Stabilization Of Cervical Spine Research Articles

Biomechanical study of the stability of posterior cervical expansive open-door laminoplasty combined with bilateral C4/5 foraminotomy and short-segment lateral mass screw fixation: a finite element analysis

BackgroundPosterior cervical expansive open-door laminoplasty (EODL) may cause postoperative C5 palsy, and it can be avoided by EODL with bilateral C4/5 foraminotomy. However, prophylactic C4/5 foraminotomy can compromise cervical spine stability. To prevent postoperative C5 palsy and boost cervical stability, We propose a new operation method: EODL combined with bilateral C4/5 foraminotomy and short-segment lateral mass screw fixation. However, there are no studies on the biomechanical properties of this surgery.PurposeEvaluating the biomechanical characteristics of EODL combined with bilateral C4/5 foraminotomy and short-segment lateral mass screw fixation and other three classic surgery.MethodsAn original model (A) and four surgical models (B-E) of the C2-T1 vertebrae of a female patient were constructed. (B) EODL; (C) EODL combined with bilateral C4/5 foraminotomy; (D) C3-6 expansive open-door laminoplasty combined with bilateral C4/5 foraminotomy and short-segment lateral mass screw fixation; (E) C3-6 expansive open-door laminoplasty combined with bilateral C4/5 foraminotomy and C3-6 lateral mass screw system. To compare the biomechanical properties of cervical posterior internal fixation; (E) C3-6 expansive open-door laminoplasty combined with bilateral C4/5 foraminotomy and C3-6 lateral mass screw system. To compare the biomechanical properties of cervical posterior internal fixation methods, six physiological motion states were simulated for the five models using a 100N load force and 1.5Nm torque. The biomechanical advantages of the four internal fixation systems were evaluated by comparing the ranges of motion (ROMs) and maximum stresses.Results The overall ROM of Model C outperformed the other four models, reaching a maximum ROM in the extension state of 10.59°±0.04°. Model C showed a significantly higher ROMs of C4/5 segment than other four models. Model D showed a significantly lower ROM of C4/5 segment than both Model B and Model C. Model E showed a significantly lower ROM of C4/5 segment than Model D. The stress in the four surgical models were mainly concentrated on the internal fixation systems.ConclusionEODL combined with bilateral C4/5 foraminotomy and short-segment lateral mass screw fixation can maintain the stability of the spine and has minimal effects on the patient’s cervical spine ROMs in the extension and flexion state. As a result, it may be a promising treatment option for cervical spondylotic myelopathy (CSM) to prevention of postoperative C5 palsy.

Cervical facet joint degeneration, facet joint angle and paraspinal muscle degeneration are correlated with degenerative cervical spondylolisthesis at C4/5: a propensity score-matched study

BACKGROUND CONTEXTPrior studies have hypothesized that degenerative cervical spondylolisthesis (DCS) may be influenced by loss of stability due to disc, facet joint or cervical alignment. Meanwhile, it is commonly believed that the facet joints and paraspinal muscles participate in maintaining cervical spine stability. However, the impact of paraspinal muscle morphology and detailed facet joint features on DCS requires further investigation. PURPOSETo compare facet joint characteristics, disc degeneration and muscle morphology between patients with DCS and those without DCS. STUDY DESIGN/SETTINGRetrospective cohort study. PATIENT SAMPLEConsecutive surgical patients with degenerative cervical spondylosis from June 2016 to August 2023 were recruited. OUTCOME MEASURESDCS was assessed on X-ray based on the translation distance. Cervical facet joint degeneration (CFD), the facet joint angle on the axial plane (FA-A) and the facet joint angle on the sagittal plane (FA-S), and facet joint tropism (FT) were measured on computerized tomography (CT). Paraspinal muscle degeneration was assessed on magnetic resonance imaging (MRI) including by the adjusted cross-sectional area (aCSA), the functional aCSA, the fat infiltration ratio (FI%). The Pfirrmann grade of the cervical disc was also evaluated. METHODSDemographic and clinical data were compared in matched and unmatched cohorts. Disc degeneration, muscle degeneration and facet joint characteristics, including FA, FT and CFD, were compared between patients with and without DCS. Furthermore, the degree of CFD was compared with that of adjacent segments in both groups. Additionally, logistic regression was performed to determine independent risk factors for DCS. Finally, the receiver operating characteristic (ROC) curve, area under the curve (AUC) and cutoff value for the risk factors were calculated. RESULTSA total of 431 surgical patients were propensity score matched for age, sex and BMI, and 146 patients were included in the final analysis, with 73 patients in the DCS group and 73 patients in the non-DCS group. DCS patients exhibited more severe CFD at C4/5 (segment with spondylolisthesis). Additionally, DCS was generally associated with more severe CFD, a more horizontal FA-S, more FT and worse paraspinal muscle health but similar disc degeneration. In addition, anterior spondylolisthesis was related to more severe CFD and decreased functional aCSA of the flexors and extensors. Finally, more severe CFD, a more horizontal FA-S and a higher FI% on deep extensor were revealed to be risk factors for DCS, with cutoff values of 1.5, 44.5̊, and 37.1%, respectively. CONCLUSIONSThis study demonstrated that CFD, the FA and FT and parasipnal muscle degeneration were associated with DCS. And may provide novel insight into the pathogenesis and nature history of DCS and suggest the evolution of degeneration in the cervical spine.

Effect of smartphone use on cervical spine stability

Using a smartphone often involves a sustained head-forward tilt posture, which may deteriorate the mechanism of muscle reaction efficiency or reduce the stiffness of connective tissues of the cervical spine. These changes in muscular and connective tissues can impair cervical spine stability and contribute to developing neck pain symptoms. In this experiment, change in the cervical spine stability associated with a sustained smartphone use posture was evaluated by quantifying the effective stiffness and the reflexive responses of the head to sudden perturbations. Seventeen young smartphone users maintained their heads tilted forward approximately 30° for 30 min while watching videos on their smartphones in sitting. Data show that the measures of cervical spine stability did not change significantly after the smartphone use task despite developing mild to moderate neck and upper body discomfort symptoms. Study findings imply that keeping the head tilt posture for 30 min for smartphone use did not significantly alter spinal stability, rejecting its association with neck discomfort.

Free-hand technique of C7 pedicle screw insertion using a simply defined entry point without fluoroscopic guidance for cervical spondylotic myelopathy patients with C3 to C6 instrumented by lateral mass screws: a retrospective cohort study

BackgroundNowadays, both lateral mass screw (LMS) and pedicle screw were effective instrumentation for posterior stabilization of cervical spine. This study aims to evaluate the feasibility of a new free-hand technique of C7 pedicle screw insertion without fluoroscopic guidance for cervical spondylotic myelopathy (CSM) patients with C3 to C6 instrumented by lateral mass screws.MethodsA total of 53 CSM patients underwent lateral mass screws instrumentation at C3 to C6 levels and pedicle screw instrumentation at C7 level were included. The preoperative 3-dimenional computed tomography (CT) reconstruction images of cervical spine were used to determine 2 different C7 pedicle screw trajectories. Trajectory A passed through the axis of the C7 pedicle while trajectory B selected the midpoint of the base of C7 superior facet as the entry point. All these 53 patients had the C7 pedicle screw inserted through trajectory B by free-hand without fluoroscopic guidance and the postoperative CT images were obtained to evaluate the accuracy of C7 pedicle screw insertion.ResultsTrajectory B had smaller transverse angle, smaller screw length, and smaller screw width but both similar sagittal angle and similar pedicle height when compared with trajectory A. A total of 106 pedicle screws were inserted at C7 through trajectory B and only 8 screws were displaced with the accuracy of screw placement as high as 92.5%.ConclusionIn CSM patients with C3 to C6 instrumented by LMS, using trajectory B for C7 pedicle screw insertion is easy to both identify the entry point and facilitate the rod insertion.

Prehospital Cervical Spine (C-spine) Stabilization and Airway Management in a Trauma Patient: A Review.

Severe traumatic damage to the brain-to-body signaling bundle that results in bruising and a partial or total tear of the spinal cord is known as a spinal cord injury (SCI). SCI may develop at the time of an eventor after. It can also developwhile handling the patient andcan worsen during the transportation of the patient. So prehospital care is crucial to prevent or minimize SCI. Prehospital care involves examining the patient, immobilizing the cervical spine (C-spine), providing cardiovascular support (keeping the mean arterial blood pressure over 85 mmHg), and carefully managing the airway (possibly intubating the patient using manual in-line stabilization (MILS)).Methylprednisolone (MPS) and other pharmacological treatments have not been shown to offer clinically meaningful and essential benefits for people with SCI. The therapeutic use of MPS in patients with SCI in the prehospital context is no longer supported. Additionally, whether or not pharmaceutical drugs will be effective in therapeutic hypothermiais unknown. When performing endotracheal intubation on these patients, the potential for C-spine damage is always considered. During intubation, the MILSapproach significantly reduces C-spine movement. The MILS method, however, can potentially restrict mouth opening and result in subpar laryngoscopic vision. These issues can be handled using the recently developed video laryngoscope, such as Airtraq laryngoscope and AirWay Scope (AWS). Compared to a direct laryngoscope, the AWSand Airtraqlaryngoscope reduced the improvement of intubation conditions and the acceleration of tracheal intubation through the occiput-C1 and C2-C4 levels of the C-spineextension movement.

Comparison of laminoplasty and posterior segment fusion with laminoplasty and anterior segment fusion for treating acute extensional cervical spinal cord injury in pre-existing canal stenosis: a multicenter retrospective study

Background: Patients with pre-existing cervical spinal canal stenosis (CSCS) are more likely to suffer from an extensional spinal cord injury (SCI). However, the appropriate surgical alternatives for extended cervical SCIs in individuals with pre-existing CSCS remain unknown. The purpose of this study was to evaluate the clinical efficacies of laminoplasty and posterior short-segment fusion (PSF) with laminoplasty and anterior short-segment fusion (ASF) in the treatment of these patients. Methods: The clinical data of 258 patients from six spine centers were included in this retrospective study. Patients were divided into two different groups based on the surgical approach: laminoplasty and PSF (PSF group) and laminoplasty and ASF (ASF group). ASIA grades and JOA scores were obtained before and after surgery to assess neurological function. Results: There were 116 patients in the PSF group and 142 patients in the ASF group. The average operation time, intraoperative blood loss, and hospital stay were 188 min, 298 ml, and 7.6 days, respectively, in PSF group, compared to 245 min, 366 ml, and 10.4 days in PSF group, respectively. Complete decompression was achieved in all patients, and fusion was achieved 6 months after surgery. A post-operative computed tomography scan revealed that 39/464 (8.4%) screws had perforated, but no neurovascular complications occurred. Both surgical strategies improved the ASIA grade and there was no significant difference between the two groups (P = 0.926). The JOA score improved from 6.21 ± 1.85 to 10.90 ± 3.56 in the PSF group and from 6.45 ± 2.17 to 11.48 ± 3.62 in the ASF group, but at the final follow-up, there was no significant difference between the two groups (P = 0.134). The incidence of post-operative complications in the ASF group (24/142, 16.9%) (P = 0.043) was higher than that in the PSF group (6/116, 5.17%). Conclusions: Cervical laminoplasty combined with short-segment transpedicular screw fixation is a reliable option to treat extensional cervical SCIs in patients with CSCS. This surgical strategy is beneficial for achieving sufficient cervical spinal cord decompression, preserving cervical spine stability, and avoiding extra anterior cervical decompression and fusion, thereby reducing surgery time, intraoperative blood loss volume, post-operative complication rate, and length of hospital stay. Relevance for Patients: Cervical laminoplasty combined with posterior segmental fusion (PSF) reduces operative time, bleeding, and complications and achieves adequate spinal cord decompression in the treatment of extension cervical SCI in patients with CSCS.

Efficacy of Cervical Spinal Stabilization Exercise on Reducing Pain for People with Cervical Spondylosis

Background: The synovial joint capsule, subchondral bone, and joint cartilage are all impacted by the gradualdegenerative condition known as OA. This research work is designed to check the efficacy of modified progressiveresistance training for OA knee patients.Purpose: To compare the effectiveness of cervical stabilization exercises and conventional physiotherapy exercisein reducing pain for patients with cervical spondylosis.Materials and Methods: The study took place in Eyan Physiotherapy Centre, Sriperumbudur, A total no of 40subjects were recruited for this study through the purposeful sampling method. All subjects were recruited basedon the inclusion and exclusion criteria. The recruited subjects were assigned to two groups (Group A: 20 Subjects)underwent Cervical Stabilization Exercise and (Group B: 20 Subjects) underwent Conventional Exercise. Allindividuals are assessed for pain using Algometer as a pre-test prior to the intervention and again after 6 weeks ofintervention. The entire study process was performed from November 2022 to April 2023.Results: This study states that cervical stabilization exercises are found to be more significant and more effectivein reducing pain compared to conventional therapy. The comparison of post mean value of Algometer of both thegroups. Group-A(Cervical Stabilization Exercise) was 4.30 and Group B(Conventional Exercise) was 3.65 whichshows gradual increase with p value <0.0001 statistically significant.Conclusion: This study recommended that clinicians consider incorporating cervical stabilization exercises intothe treatment plan for individuals with cervical spondylosis. The evidence supporting the efficacy of cervicalstabilization exercise in reducing pain in individuals with cervical spondylosis.

Everyday Water-Related Emergencies: A Didactic Course Expanding Wilderness Medicine Education.

This small group session is appropriate for any level of emergency medicine resident physicians. Drowning is defined as the process of experiencing respiratory impairment from submersion or immersion in liquid. It is the third leading cause of unintentional injury-related deaths worldwide, accounting for 7% of all injury-related deaths.1 Our group sought to improve resident education regarding the basics of water safety and rescues as an event developed by our wilderness medicine (WM) interest group. With the growing number of WM Fellowships, specialty tracks, interest clubs and the regular inclusion of WM topics in residency didactics, exposure to WM topics has increased greatly.2 There is a large overlap between wilderness medicine and the field of emergency medicine. Both require stabilization, improvisation, and the treatment of environmental/exposure illnesses. It is imperative that emergency medicine physicians understand the complex pathophysiology of drowning, as well as recognize and manage potential associated traumatic injuries including fractures and critical hemorrhage. Our goal is to provide additional curricular instruction on prehospital management of water-related emergencies and related injuries to emergency medicine residents. By the end of the session, the learner will be able to: 1) describe the pathophysiology of drowning and shallow water drowning, 2) prevent water emergencies by listing water preparations and precautions to take prior to engaging in activities in and around water, 3) recognize a person at risk of drowning and determine the next best course of action, 4) demonstrate three different methods for in-water c-spine stabilization in the case of a possible cervical injury, 5) evaluate and treat a patient after submersion injury, 6) appropriately place a tourniquet for hemorrhage control, and 7) apply a splint to immobilize skeletal injury. A group of 16 resident learners received a thirty-minute introduction discussion (with open discussion) regarding water safety, basic water rescue methods, and submersion injury pathophysiology. They then progressed through three stations designed to emphasize select skills and knowledge related to submersion injury management, water rescue, and tourniquet and splint placement. Participants completed a six-item questionnaire after the event designed to help gage participant comfort level of treatment, management, and experience regarding water safety, drowning, and related traumatic emergencies. Each item was ranked from 0 for "strongly disagree" to 10 for "strongly agree." Total mean scores before and after were compared. Sixteen individuals participated in the sessions and survey. The total mean score for the six-item analysis increased following the workshop (26.3 before versus 46.9 after, p = 0.001). The positive improvement in all categories indicated increased comfort in the topics of the small group sessions, with the largest improvement in the question about comfort in effectively evaluating and treating a patient presenting to the ED after a submersion injury. Utilizing discussions and hands-on group sessions increased residents' perceived learning. This model can be applied to an extensive number of wilderness medicine topics for learners of all levels. For individuals with time-restrictive schedules, this model is an efficient mode of learning and teaching drowning and injury management skills with the potential for further topics and future courses. Wilderness medicine, water safety, pathophysiology of drowning, in-water rescues, in-water cervical spine stabilization, management of drowning in the ED, splinting, tourniquets.

Cervical Spinal Immobilization: A Head-to-Head Comparison of a One-Step Spray-on Foam Splint Versus Structural Aluminum Malleable Splint Immobilization.

Cervical spine immobilization in a low-resource environment is difficult secondary to limited equipment, prolonged transportation, and secondary complications. A structural aluminum malleable (SAM) splint is commonly utilized because of its availability and multipurpose intention. A one-step spray-on foam immobilization technique (Fast Cast) has been shown to be effective in lower-extremity splinting. The aim of this study was to demonstrate the ability of the Fast Cast to effectively immobilize the cervical spine in a head-to-head comparison against the SAM splint. We hypothesized that there would be no difference in surgeon scoring between Fast Cast and SAM splints for the immobilization of the cervical spine. This was a cadaveric experimental comparative study that compared a SAM splint versus Fast Cast for the immobilization of an unstable cervical spine. Each of the three cadaveric specimens had a corpectomy without fixation performed. A board-certified emergency medicine physician specialized in disaster medicine performed all SAM immobilizations. An orthopedic surgeon performed Fast Cast immobilizations. Each method of immobilization was done on each cadaver. Lateral fluoroscopic imaging was taken before and after immobilization and after log roll/gravity stress. Five board-certified orthopedic surgeons served as graders to independently score each splint. A 5-point Likert scale based on 10 splinting criteria (50 total points possible) was utilized to evaluate cervical spine immobilization. The lead statistical analyst was blinded to the immobilization groups. The statistical significance was assessed via a Wilcoxon signed-rank test and chi-square Fisher's exact test with significance between groups set at α < .05. Inter-rater reliability of the Likert scale results was assessed with the interclass correlation coefficient. Inter-rater reliability for the current Likert scale in the evaluation of cervical spine stabilization was good (interclass correlation coefficient = 0.76). For the cumulative Likert scale score, Fast Cast (32 [28-34]) exhibited a higher total score than SAM (44 [42-47]; P < .01). Likewise, Fast Cast exhibited a greater likelihood of higher Likert scores within each individual question as compared to SAM (P ≤ 0.04). In 100% of cases, raters indicated that Fast Cast passed the gravity stress examination without intrinsic loss of reduction or splinting material, whereas 33% of SAM passed (P < .01). In 100% of cases, raters indicated that Fast Cast passed the initial radiographic alignment following immobilization, whereas 66% of SAM passed (P = .04). In 100% of cases, raters indicated that Fast Cast passed radiographic alignment after the gravity stress examination, whereas 47% of SAM passed (P < .01). The Fast Cast exceeded our expectations and was shown to be rated not equivalent but superior to SAM splint immobilization for the cervical spine. This has significant clinical implications as the single-step spray-on foam is easy to transport and has multifaceted applications. It also eliminates pressure points and circumferential wrapping and obstruction to airway/vascular access while immobilizing the cervical spine and allowing for radiographic examination. Further studies are needed for human use and application.

Posterior cervical full-endoscopic technique for the treatment of cervical spondylotic radiculopathy with foraminal bony stenosis: A retrospective study.

In the treatment of cervical spondylotic radiculopathy (CSR), spinal endoscopy has been developed vigorously in the past 30 years. However, its effectiveness and subsequent problem of cervical spine stability have always been the controversial hotspots. This study aims to conduct a retrospective study using posterior cervical full-endoscopic technique for the treatment of CSR with foraminal bony stenosis, and evaluate its clinical effect and application value. All 22 patients treated for CSR with foraminal bony stenosis using posterior cervical full-endoscopic technique were analyzed since Dec 1, 2016, to Apr 30, 2020. The data collection included operation time, length of stay, wound healing, surgical complications, visual analog scale (VAS), Japanese Orthopaedic Association (JOA) scores, intervertebral foramen diameter, intervertebral foramen area and cervical instability. The relevant indicators were observed on admission, at postoperative 1 week and 3 months, and at the last follow-up. The operation time was 141.6 ± 13.7 min. The length of stay was 6.0 ± 2.5 days. VAS and JOA at different time points after operation were decreased compared with before operation (p < 0.05). There were no statistical differences between VAS or JOA at different postoperative time points (p > 0.05). The height, anteroposterior diameter and area of intervertebral foramen after operation were significantly increased compared with before operation (p < 0.05). Posterior cervical full-endoscopic technique shows the advantages of smaller invasion, faster recovery, significant effectiveness and fewer complications in our study. Meanwhile, it has little influence on the ROM and stability of the cervical spine. Therefore, it is a minimally invasive, safe and effective surgical method for the treatment of CSR with foraminal bony stenosis.

Improvement of cervical spine mobility and stance stability by wearing a custom-made mandibular splint in male recreational athletes.

The range of motion (ROM) of the cervical spine and postural stability are important for an economical and motorically adequate adaptation of the body to any situation. Therefore, this study aims to analyze whether these two components of postural and movement control can be influenced by means of a splint in a centric position compared to habitual occlusion. 38 recreational male athletes volunteered. Cervical spine ROM was recorded using an ultrasound system and the a pressure measuring plate for postural stability (length of center of pressure (CoP) movement, area of CoP). The two dental occlusion conditions employed were the habitual occlusion and wearing a splint in an idealized, condylar position close to the centric position. Level of significance was set at ρ ≤ 0.05. The cervical spine mobility increased significantly by wearing the splint regarding rotation to the left (+3.9%) and right (+2.7%) and lateral flexion to the left (+4.4%) and right (+6.7%). Wearing the splint reduced the area of sway deflections by about 31.5% in the bipedal stance and by about 2.4% (left) and 28.2% (right) in the unipedal stance. The CoP trace was reduced in the sagittal plane by approximately 8.2% in the right single-leg stance. The major findings seem to demonstrate that wearing a splint that keeps the jaw close to the centric relation may increase the cervical ROM and may improve balance stability in male recreational athletes. Changing the jaw relation in athletes can possibly aid the release of performance potentials by improving coordination skills.

Refining the role of cervical spine immobilization and stabilization in pediatric non-accidental trauma, a retrospective series of 1008 patients.

Prompt detection of traumatic cervical spine injury is important as delayed or missed diagnosis can have disastrous consequences. Given the understood mechanism of non-accidental trauma (NAT), it is reasonable to suspect that cervical spine injury can occur. Current management of young children being evaluated for NAT includes placement of a rigid collar until clinical clearance or an MRI can be obtained. Currently, there exists a lack of robust data to guide cervical bracing. Anecdotally, our group has not observed a single patient with a diagnosis of NAT who required operative stabilization for cervical spine instability. This study will be the largest series to date and aims to systematically investigate this observation to determine the likelihood that children with a diagnosis of NAT harbor cervical spine instability related to their injuries. Patient data from the Children's Hospital Colorado Trauma Registry diagnosed with non-burn-only NAT were reviewed retrospectively. Children less than 4years of age pulled from the registry from January 1, 2005, to March 31, 2021, were included. Demographic, admission/discharge, imaging, and clinic management data were collected for each patient and analyzed. There were 1008 patients included in the cohort. The age at presentation ranged from 5days to 4years (mean 10.4months). No patient had X-ray or CT findings concerning for cervical instability. Three patients had MRI findings concerning for cervical instability. Two of these underwent external bracing, and the third died from unrelated injuries during their hospitalization. Only four patients were discharged in a cervical collar, and all were ultimately cleared from bracing. No patient underwent a spinal stabilization procedure. While the mechanism of injury in many NAT cases would seem to make significant cervical spine injury possible, this single-center retrospective review of a large experience indicates that such injury is exceedingly rare. Further study is merited to understand the underlying pathophysiology. However, it is reasonable to consider cervical collar clearance in the setting of normal radiographs and a reassuring neurological exam. Furthermore, if concerns exist regarding cervical spine instability on MRI, an initial trial of conservative management is warranted.

Endoscopy-assisted high anterior cervical approach in craniovertebral junction (CVJ)

Surgical procedures in the craniovertebral junction (CVJ) suffer from specific challenges due to the proximity between the cranium and spine containing the critical neurovascular structures and the brainstem, respectively. Owing to the complex transitional zone, it is highly challenging for classic surgical approaches to practically acquire the additional exposure to neurovascular structures of the CVJ. Inspired by these facts, we explore the feasibility of an endoscopy-assisted high anterior cervical approach in the CVJ. To explore the feasibility of an endoscopy-assisted approach, we quantitatively assessed the surgical corridor and extent of exposure of the CVJ in 6 cadaveric specimens using 0° and 30° endoscopes. The applied endoscopes provided adequate exposure to neurovascular structures and the brainstem in the CVJ. Notably, the resection of the anterior arch of C1 is avoided in minimal anterior clivectomy. Further, improved exposure of the CVJ is obtained after removing the odontoid. An endoscope-assisted high anterior cervical approach in the CVJ significantly preserved the cervical spine stability while minimalizing the risk of neurovascular injury within the surgical corridor.

The Impact of Suboccipital Muscle Release on Pain and Range of Motion in the Cervical Spine of Young Adults

Introduction: Limited mobility and pain in the cervical spine affect 50% of the population, leading to disability and a reduction in quality of life. It is important to use effective forms of therapy. One of them, enjoying growing popularity, is deep tissue massage, the stability of which requires confirmation in scientific research. Research objective: The aim of the study was to investigate how a single deep tissue massage therapy aimed at suboccipital muscles reduces pain and improves the range of motion in the cervical spine and how long the improvement lasts. Research materials and methods: The study participants included 41 people aged 20-34. The respondents were randomly divided into 2 groups: study (21 people) and control (20 people). The subjects completed a questionnaire consisting of 14 questions and were subjected to 2 tests for evaluating cervical spine stability: the covering membrane test and the anterior occipital membrane test. Then, the measurements of pain on the VAS scale (0-10) and the range of cervical mobility were collected. Measurements were taken before, immediately after, as well as 2 and 4 weeks following the therapeutic intervention. The therapy in the study group consisted of a single, 10-minute relaxation session of the sub-occipital muscles. In the control group, cervical spine traction, lasting 30 seconds, was performed 3 times. Results: In the study group, the pain decreased statistically significantly (p&lt;0.05), before the therapy it totalled 4.33 ± 1.49, while after the therapy, its value decreased to 2.05 ± 0.86 and lasted up to 2 weeks after the massage – 2.67 ± 1.49. In the control group, the pain level before the therapy was 4.25 ± 0.76, and following the therapy, it decreased to 3 ± 0.95 and then increased to the mean value of 4 ± 1 (after 2 weeks). On average, the level equalled 4.25 ± 0.76 (after 4 weeks). In the study group, the range of flexion motion was, on average, 3.24 ± 1.00 cm, extension, mean 6.90 ± 1.14 cm, lateral flexion to the left, on avg. 4.76 ± 0.62, to the right on avg. 4.90 ± 1.04 cm, left rotation on avg. 8.43 ± 0.81, and right rotation on avg., 8.19 ± 1.08 cm. After deep tissue massage therapy, the results differed from the range of motion results obtained in the control group: flexion totalled 5.67 ± 0.48 cm immediately after therapy and 4.90 ± 1.34 cm 2 weeks post-intervention, extension 8.57 ± 0.87 cm immediately after therapy and 7.62 ± 1.47 cm 2 weeks after therapy, and finally, left lateral flexion 5.52 ± 0.81 directly following the therapy and 5.43 ± 0.93 cm 2 weeks after therapy. Conclusions: 1. Single-session deep tissue massage therapy significantly reduces pain and increases range of motion in the cervical spine. 2. The effects last up to 2 weeks following the therapy.

Pediatric mandibular fracture with concomitant craniovertebral ligament injuries and retroclival hematoma: A rare occurrence

The mandible is one of the most commonly fractured facial bone in children. The principle of management of pediatric mandibular fracture bears no resemblance to its adult counterpart due to concerns regarding the growing facial skeleton and development of dentition. Pediatric mandibular fractures with traumatic retroclival hematoma and concomitant craniovertebral junction injuries is an extremely rare entity reported in literature. Manipulation during operative procedure for mandibular fractures could potentially cause serious injuries to the spinal cord, leading to significant disability and mortality. The authors report a case of a 12-year-old child with right parasymphysis and left angle of mandible fracture treated by open reduction internal fixation (ORIF). Her craniovertebral ligamentous injuries and retroclival hematoma were treated conservatively with good outcome. The presence of a halo frame for cervical spine stabilization during ORIF contributed to the difficulty in operative management. • Attending surgeons should have a high level of suspicion for cervical spine injury in pediatric maxillofacial fracture cases. • Improper examination and manipulation to the head and neck region could cause serious injuries to the spinal cord leading to devastating outcomes in the young child. • Multidisciplinary team management is important in concomitant maxillofacial and cervical spine injuries for safe and optimal outcome.

Comparative effect of upper thoracic spine mobilization with mobility exercises and upper cervical spine mobilization with stabilization exercises in mechanical neck pain: a randomized clinical trial

Background &amp; Objective: Neck pain is a very prevalent health condition. Physiotherapists use multiple treatment options for treating mechanical neck pain. We evaluated the effects of upper thoracic spine mobilization and mobility exercise and upper cervical spine mobilization and stabilization exercises in treating patients with mechanical neck pain.&#x0D; Methodology: A randomized clinical trial was conducted comprising of 36 patients recruited from different clinics of Faisalabad, both genders, ages from 20-40 y, and randomly divided into two groups. Group A underwent upper thoracic mobilization and mobility exercise while Group B underwent upper cervical mobilization with stabilization exercises for 2 times a week for 4 weeks. Pain scores on Numerical Pain Rating Scale (NPRS) and cervical range of movements (ROM) scores were measured before treatment and then weekly for 4 weeks, while Neck Disability Index (NDI) was assessed at baseline and at the end of 4th week. SPSS version. 22 was used to analyze the data. Independent sample t-test was used for between group compression and P ≤ 0.05 (95%) was considered as significant.&#x0D; Results: There was significant improvement in mean NPRS scores at 1st week, 2nd week, 3rd week and 4th week post-treatment (P &lt; 0.05). There was significant improvement in mean cervical ROM at 2nd week, 3rd week and 4th week post-treatment readings (P &lt; 0.05) and mean NDI score at 4th week (P &lt; 0.05).&#x0D; Conclusion: Both groups were found effective in improving pain, range of motion and neck function, but significant improvement in outcomes was observed in upper cervical mobilization and stabilization exercises group.&#x0D; Abbreviations: NPRS - Numerical Pain Rating Scale; ROM - Range of movements; NDI - Neck Disability Index; MNP - Mechanical neck pain;&#x0D; Key words: Adult; Cervical Vertebrae / physiopathology; Disability Evaluation; Exercise Therapy / methods; Female; Humans; Male; Manipulation, Spinal / methods; Neck / physiopathology; Neck Pain / physiopathology; Neck Pain / rehabilitation; Pain Measurement; Range of Motion, Articular; Thoracic Vertebrae / physiopathology; Treatment Outcome; Young Adult&#x0D; Citation: Tahir R, Sohail MAA, Ain NU, Aine QU, Mannan H, Maqbool A. Comparative effect of upper thoracic spine mobilization with mobility exercises and upper cervical spine mobilization with stabilization exercises in mechanical neck pain: a randomized clinical trial. Anaesth. pain intensive care 2022;26(4):488-495.&#x0D; DOI: 10.35975/apic.v26i4.1952&#x0D; Received: April 11, 2022; Reviewed: June 23, 2022; Accepted: July 14, 2022

Anterior cervical transpedicular screw fixation system in subaxial cervical spine: A finite element comparative study.

Multilevel cervical corpectomy has raised the concern among surgeons that reconstruction with the anterior cervical screw plate system (ACSPS) alone may fail eventually. As an alternative, the anterior cervical transpedicular screw (ACTPS) has been adopted in clinical practice. We used the finite element analysis to investigate whether ACTPS is a more reasonable choice, in comparison with ACSPS, after a 2-level corpectomy in the subaxial cervical spine. These 2 types of implantation models with the applied 75 N axial pressure and 1 N • m pure moment of the couple were evaluated. Compared with the intact model, the range of motion (ROM) at the operative segments (C4–C7) decreased by 97.5% in flexion-extension, 91.3% in axial rotation, and 99.3% in lateral bending in the ACTPS model, whereas it decreased by 95.1%, 73.4%, 96.9% in the ACSPS model respectively. The ROM at the adjacent segment (C3/4) in the ACTPS model decreased in all motions, while that of the ACSPS model increased in axial rotation and flexion-extension compared with the intact model. Compared to the ACSPS model, whose stress concentrated on the interface between the screws and the titanium plate, the stress of the ACTPS model was well-distributed. There was also a significant difference between the maximum stress value of the 2 models. ACTPS and ACSPS are biomechanically favorable. The stability in reducing ROM of ACTPS may be better and the risk of failure for internal fixator is relatively low compared with ACSPS fixation except for under lateral bending in reconstruction the stability of the subaxial cervical spine after 2-level corpectomy.

Subaxial Lateral Mass Prosthesis for Posterior Reconstruction of Cervical Spine.

Posterior facetectomy or lateral mass resection is often used during cervical dumbbell tumor resection, jeopardizing the stability of cervical spine. The space after resection of one or more lateral masses, if left unfilled might hamper bone fusion and structural support. There were the aims to obtain the relevant morphometry of the lateral mass of the subaxial cervical spine (C3-C7) and to design a lateral mass prosthesis for the posterior reconstruction of the cervical spine. The computed tomography (CT) scans of healthy volunteers were obtained. RadiAnt DICOM Viewer software (Version 2020.1, Medixant, Poland) was used to measure the parameters of lateral mass, such as height, anteroposterior dimension (APD), mediolateral dimension (MLD), and facet joint angle. According to the parameters, a series of cervical lateral mass prostheses were designed. Cadaver experiment was conducted to demonstrate its feasibility. Twenty-three volunteers with an average age of 30.1 ± 7.1 years were enrolled in this study. The height of the lateral mass was 14.1 mm on average. The facet joint angle, APD, and MLD of the lateral mass averaged 40.1 degrees, 11.2 mm, and 12.2 mm, respectively. With these key data, a lateral mass prosthesis consisting of a column and a posterior fixation plate was designed. The column has a 4.0-mm radius, 41-degree surface angle, and adjustable height of 13, 15, or 17 mm. In the cadaver experiment, the column could function as a supporting structure between adjacent facets, and it would not violate the exiting nerve root or the vertebral artery. This study provided a detailed morphology of the lateral mass of the subaxial cervical spine. A series of subaxial cervical lateral mass prostheses were designed awaiting further clinical application.

Numerical investigation on the stability of human upper cervical spine (C1–C3)

The finite element method (FEM) is an efficient and powerful tool for studying human spine biomechanics. In this study, a detailed asymmetric three-dimensional (3D) finite element (FE) model of the upper cervical spine was developed from the computed tomography (CT) scan data to analyze the effect of ligaments and facet joints on the stability of the upper cervical spine. A 3D FE model was validated against data obtained from previously published works, which were performed in vitro and FE analysis of vertebrae under three types of loads, i.e. flexion/extension, axial rotation, and lateral bending. The results show that the range of motion of segment C1-C2 is more flexible than that of segment C2-C3. Moreover, the results from the FE model were used to compute stresses on the ligaments and facet joints of the upper cervical spine during physiological moments. The anterior longitudinal ligaments (ALL) and interspinous ligaments (ISL) are found to be the most active ligaments, and the maximum stress distribution is appear on the vertebra C3 superior facet surface under both extension and flexion moments.

Design of Personalized Cervical Fixation Orthosis Based on 3D Printing Technology.

The movement of the cervical spine should be restricted throughout the rehabilitation phase after it has been injured. Cervical orthosis is commonly utilized in clinical settings to guarantee cervical spine stability. However, to date, the investigations are limited to patient-specific cervical fixation orthoses. This study provides a new idea for making personalized orthoses. The CT data of the patient's cervical spine were collected, then mimics were used for reconstructing the skin of the cervical spine, the Geomagic Studio was used for surface fitting, the Inspire Studio was used for structural topology optimization, redundant structures were removed, the resulting orthotics were postprocessed, and finally, it was printed with a 3D printer. No signs of pain or discomfort were observed during the wearing. The cervical spine range of motion in flexion, extension, lateral flexion, and rotation is all less than 8° after using the device. Low cost, quick manufacturing time, high precision, attractive appearance, lightweight structure, waterproof design, and practical customized orthotics for patients are all advantages of 3D printing technology in the field of orthopedics. Many possible benefits of using 3D printing to build new orthotics include unique design, stiffness, weight optimization, and improved biomechanical performance, comfort, and fit. Personalized orthotics may be designed and manufactured utilizing 3D printing technology.