Hospital For Special Surgery Knee Research Articles

The reliability and validity of the Lie‑To‑Sit‑To‑Stand‑To‑Walk transfer test in total knee arthroplasty.

Total knee arthroplasty (TKA) is the standard procedure for treating end-stage knee osteoarthritis. Nevertheless, some residual issues can persist, leading to various problems, including pain, compromised strength, impaired proprioception, postural instability, dynamic balance issues, and gait deficiencies. The Lie-to-Sit-to-Stand-to-Walk Transfer Test (LSSWT) implements a multi-faceted methodology to evaluate basic transfer abilities. The purpose of this study is to investigate the validity, reliability, and minimal clinically important difference of the LSSWT in TKA patients. Twenty-two patients with TKA were enrolled in this study. The patients were administered the LSSWT, the Timed Up and Go Test (TUG), and the Hospital for Special Surgery (HSS) knee score. Patients rested between the tests for an hour to prevent fatigue. The mean age was 68.1 ± 2.59 years and the mean HSS Knee Score was 85.43 ± 3.47 of the patients. The relative (ICC coefficient) and absolute (SEM and SRD95) reliability values were 0.88, 1.21, and 3.33 respectively. The Spearman correlation coefficient of the LSSWT with the TUG was 0.63. The LSSWT displays excellent reliability and high validity in assessing fall risk, complex dynamic balance, and mobility required for daily activities in patients post-TKA. The low MCID value (3.33) indicates its sensitivity and ability to identify minor changes in a patient's status over time or in response to rehabilitation applications. Therefore, it is recommended to use the LSSWT when evaluating fall risk, dynamic balance, and mobility for community living, discharge planning, or facility admission.

Application of modified Frosch approach for Schatzker typeⅡtibial plateau fractures with posterolateral column

To explore clnical efficacy of modified Frosch approach for Schatzker typeⅡtibial plateau fracture with posterolateral column. From January 2019 to September 2020, totally 11 patients with Schatzker typeⅡtibial plateau fractures with posterolateral column were treated, including 7 males and 4 females, aged from 21 to 49 years old. Modified Frosch approach was adopted for lateral decubitus position, and posterolateral fractures were fixed with support plates or posterolateral screws. Anterolateral fixation with conventional tibial plateau lateral locking plate. Tibial plateau varus angle and posterior inclination angle were measured by X-ray immediately and 12 months after operation, as well as knee motion at 12 months after operation. Knee function at 12 months after operation was evaluated by knee score of Hospital for Special Surgery(HSS). Eleven patients were followed up for 12 to 15 months. Varus angle and inclination angle at immediately after operation ranged from 76° to 86° and 6° to 10°, respectively, and 79° to 88° and 6° to 10°, respectively at 12 months after operation. The range of extension of knee ranged from 0° to 5°, and flexion was 106° to 137° at 12 months after operation. Postoperative HSS knee score at 12 months ranged from 74 to 94 scores, 8 patients were excellent and 3 good. Modified Frosch approach is an effective surgical method for Schatzker typeⅡtibial plateau fracture with posterolateral column. A single incision is used to complete fracture exposure and fixation at two sites, avoiding use of combined incisions, and could obtain good postoperative knee joint function. During operation, popliteal fossa structure should be familiar, and the common peroneal nerve should be protected to avoid injury.

Outcomes of Anterior Lateral Approach and Gerdy's Tubercle Osteotomy for Tibial Plateau Fractures Involving the Posterior Lateral Condyle: A Retrospective Study of 20 Patients.

BACKGROUND The objective of this investigation was to assess the effectiveness of using T-shaped steel plates through the anterior lateral approach and Gerdy's tubercle osteotomy for treating posterior lateral tibial plateau fractures. MATERIAL AND METHODS A retrospective analysis was conducted on clinical data from 20 patients, aged on average 53.9±10.36 years, who were admitted for tibial plateau fractures involving the posterior lateral condyle between January 2019 and October 2022. The fixation and reduction of the posterior lateral bone block were performed using the anterior lateral approach combined with Gerdy's tubercle osteotomy to address the posterior lateral tibial plateau fracture. Post-surgery assessment was conducted using the Hospital for Special Surgery (HSS) knee combined score. RESULTS During the 12-24 (14.2±1.7) month postoperative period, we conducted 20 surgeries. Within 9 to 12 weeks, fracture healing transpired without any complications such as incision infection, nerve injury, or fracture displacement being detected. Assessment of knee joint function at the final follow-up was conducted using the HSS knee combined score, with results indicating 16 cases rated as excellent, 3 cases as good, and 1 case as fair. CONCLUSIONS In tibial plateau fractures impacting the posterior lateral condyle, the anterior lateral approach, combined with Gerdy's tubercle osteotomy, allows for direct exposure and manipulation of the posterior lateral bone block fracture. Using a T-shaped support plate and a lateral locking plate provides a reliable method for fracture fixation, aiding in convenient surgical positioning and intraoperative fluoroscopy. The treatment approach effectively manages fractures located on the posterior lateral aspect of the tibial plateau.

Hexaxial external fixator versus intramedullary nail in treating segmental tibial fractures: a retrospective study

BackgroundIt’s difficult to treat segmental tibial fractures (STFs), which are intricate injuries associated with significant soft tissue damage. The aim of this study was to compare the clinical effect of hexaxial external fixator (HEF) and intramedullary nail (IMN) in treatment of STFs.MethodsA total of 42 patients with STFs were finally recruited between January 2018 and June 2022. There were 25 males and 17 females with age range of 20 to 60 years. All fractures were classified as type 42C2 using the Arbeitsgemeinschaftfür Osteosythese/Orthopaedic Trauma Association (AO/OTA) classification. 22 patients were treated with HEF and 20 patients were treated with IMN. The condition of vascular and neural injuries, time of full weight bearing, bone union time and infection rate were documented and analyzed between the two groups. The mechanical medial proximal tibial angle (mMPTA), mechanical posterior proximal tibial angle (mPPTA), mechanical lateral distal tibial angle (mLDTA), mechanical anterior distal tibial angle (mADTA), hospital for special surgery (HSS) knee joint score, American Orthopaedic Foot and Ankle Society (AOFAS) ankle joint score, range of motion (ROM) of flexion of keen joint and ROM of plantar flexion and dorsal flexion of ankle joint were compared between the two groups at the last clinical visit.ResultsThere were no vascular and neural injuries or other severe complications in both groups. All 22 patients in HEF group underwent closed reduction but 3 patients in IMN group were treated by open reduction. The time of full weight bearing was (11.3 ± 3.2) days in HEF group and (67.8 ± 5.8) days in IMN group(P < 0.05), with bone union time for (6.9 ± 0.8) months and (7.7 ± 1.4) months, respectively(P < 0.05). There was no deep infection in both groups. In the HEF group and IMN group, mMPTA was (86.9 ± 1.5)° and (89.7 ± 1.8)°(P < 0.05), mPPTA was (80.8 ± 1.9)° and (78.6 ± 2.0)°(P < 0.05), mLDTA was (88.5 ± 1.7)° and (90.3 ± 1.7)°(P < 0.05), while mADTA was (80.8 ± 1.5)° and (78.4 ± 1.3)°(P < 0.05). No significant differences were found between the two groups at the last clinical visit concerning HSS knee joint score and AOFAS ankle joint score, ROM of flexion of keen joint and ROM of plantar flexion of ankle joint (P > 0.05). The ROM of dorsal flexion of ankle joint in IMN group was (30.4 ± 3.5)°, better than (21.6 ± 2.8)° in HEF group (P < 0.05).ConclusionIn terms of final clinical outcomes, the use of either HEF or IMN for STFs can achieve good therapeutic effects. While HEF is superior to IMN in terms of completely closed reduction, early full weight bearing, early bone union and alignment. Nevertheless, HEF has a greater impact on the ROM of dorsal flexion of the ankle joint, and much more care and adjustment are needed for the patients than IMN.

The use of a walking aid before surgery is not related to worse short-term outcomes after simultaneous bilateral total knee arthroplasty

Introduction: No study has been performed to compare patients’ pre- and post-operative knee disability, functional status, and length of hospital stay after surgery between patients with and without using a walking aid. Methods: One-hundred forty-five patients were enrolled and divided into four groups based on whether they used any walking aids before surgery: no walking aid, one cane, one elbow crutch, and two elbow crutches. The groups were compared for knee disability (Hospital for Special Surgery (HSS) knee score), functional status (Iowa Level of Assistance Scale (ILAS)), and length of hospital stay. Results: For the pre-operative HSS knee scores, no statistically significant differences were found between the groups ( p &gt; 0.05). For the pre-operative ILAS scores, the patients without using walking aids had better functional status than those using any walking aids ( p &lt; 0.05). For the post-operative outcomes, no statistically significant differences were found between the groups in the HSS knee and the ILAS scores and length of hospital stay after surgery. Conclusion: In this population, using any walking aids before surgery is related to worse pre-operative functional status but not to the pre-operative knee disability. Furthermore, it is not related to the short-term outcomes after surgery.

Is proximal tibial tubercle osteotomy superior to distal tibial tubercle osteotomy for medial compartmental osteoarthritis? A meta-analysis

BackgroundOpen-wedge high tibial osteotomy (OWHTO) is commonly performed for the treatment of medial compartment knee osteoarthritis (KOA), and is classified into proximal tibial tubercle osteotomy (PTO) and distal tibial tubercle osteotomy (DTO). The PTO osteotomy point is generally located about 3–4 cm below the joint of the proximal tibia, and the osteotomy line points to the upper part of the proximal tibiofibular joint. The DTO osteotomy point is generally located about 0.5–1.0 cm below the tibial tubercle, and the osteotomy line points to the contralateral cortex. However, there is currently no consensus on which surgical technique is superior. The purpose of our study was to investigate which among the two is superior for medial KOA, with respect to knee joint parameters, clinical function, and complications.MethodsThis study was conducted as per the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. The Cochrane Central Library, MEDLINE, Embase, PubMed, CNKI, and WanFang databases were systematically searched for trials comparing PTO and DTO in patients with medial compartment KOA, from inception until March 2022. The meta-analysis was conducted using RevMan 5.2 software. The Cochrane risk-of-bias tool was used to assess methodological quality. Statistical analysis was performed with Stata 12.0. Outcomes of interest included the Insall-Salvati index (ISI), Caton-Deschamps index (CDI), Blackburne-Peel index (BPI), posterior tibial slope (PTS), and the Hospital for Special Surgery (HSS) knee-rating scale.ResultsA total of 15 retrospective studies (910 knees) were included. There were no significant differences in the age or sex of included patients. There was a significant difference in the ISI, CDI, BPI, and PTS between the two groups (all p ≤ 0.05). Further, DTO was associated with a significantly greater number of postoperative complications (p < 0.05) compared to PTO. However, there was no significant difference in the femorotibial angle (FTA), mechanical medial proximal tibial angle (mMPTA), and HSS knee score (all p > 0.05).ConclusionsCompared with DTO, PTO is associated with a greater incidence of postoperative patella baja and increased PTS, whereas DTO is associated with more postoperative complications. Nevertheless, both can significantly correct knee varus deformity and improve knee function; their early knee function scores are also similar.Trial Registration. Prospective Register of Systematic Reviews (PROSPERO) registration number CRD42021284443.

Retrograde Intramedullary Interlocking Nailing in Fractures of the Distal Femur: A Review of 20 Cases with an Average Follow-Up of One Year

Objectives: In patients with distal femur fractures, we studied the role of retrograde locked intramedullary nails. Methods: Retrograde locked intramedullary nailing was used to treat the distal femur fractures of 20 patients (15 males, 5 females; mean age 47 years; range 25 to 69 years). Two patients had fracture of the distal femur and shaft. The fractures were classified as A1 (n=12), A2 (n=6), A3 (n=2), by the AO classification. There were two Grade I open fractures and 18 closed fractures. Three fractures were managed with percutaneous technique. At the mean first follow-up time of 18 months (range 15-48 months and mean second follow up at 27 months (range 12 to 68 months), the concluding functional results were assessed by using the modified Hospital for Special Surgery (HSS) knee assessment scale. Results: The average time to achieve union was 24.2 weeks (range 14 to 42 weeks). One patient had a delayed union (44 weeks). Five knees (25%) had normal joint range of motion, ten knees (50%) were having range of motion from 100° to 110°, three knees (15%) were having range of motion of 80°, and two knees (10%) were having range of motion below the 80°. According to the modified HSS knee scale, the results were excellent in eleven cases (55%), good in six (30%), moderate in two (10%), and poor in one case (5%). In two patients (10%), the postoperative radiographic examination revealed varus angulation (10°), healing took place with severe distortion in one subject. None of the patient had any deep infection or wound issues. Conclusion: Retrograde femoral nailing is an effective method for treating distal femoral shaft fractures. The healing rate of femoral shaft fractures fixed with a retrograde nail is the same regardless of fracture location, patient age, gender, or degree of comminution. For good results surgical treatment, post-surgery immediate knee mobilisation and avoiding nail tip prominence in the knee are essential.

The Ilizarov technique in the management of haemophilic knee flexion contracture.

The Ilizarov technique has the potential to be an attractive option for severe knee flexion contracture (KFC) patients with a high risk of bleeding. However, studies on this technique in the management of haemophilic KFC are scarce. The purpose of this study was to review and analyse the results of the Ilizarov technique in correcting haemophilic KFC and to evaluate the safety and efficacy of this technique. Twelve male haemophilia patients with severe KFC who underwent distraction treatment using the Ilizarov technique from June 2013 to April 2019 were included in this study. The hospital day, flexion contracture, range of motion (ROM) of the knees, complications and functional outcomes were recorded and analysed. Functional outcomes were evaluated according to the Hospital for Special Surgery (HSS) knee scores of the preoperation, end of distraction and last follow-up. The average preoperative flexion contracture and range of motion (ROM) of the knees were 55±15° and 66±18°, respectively. The average preoperative HSS knee score was 47±5. The average duration of follow-up was 75.5±30.1 months. All flexion contractures achieved full correction (≤5°) at the end of distraction, and the flexion contracture significantly decreased to 6±5° at the last follow-up (p<.0001). The ROM of the knees was significantly increased at the last follow-up compared with that before distraction treatment (p<.0001). The HSS knee scores at the end of distraction and at the last follow-up were both significantly higher than the preoperative HSS knee score (p<.0001). No major complications were encountered. This study provided evidence for the safety and effectiveness of Ilizarov technique plus physical therapy in the management of haemophilic KFC and accumulated clinical experience for the proper application of this technology.

An Improvement in Knee Disability does not Mean an Improvement in Functional Status in Geriatric Patients after Total Knee Arthroplasty

Purpose: We aimed to investigate the relationship between the change in knee disability and change in functional status from before bilateral total knee arthroplasty (TKA) to discharge in geriatric patients. &#x0D; Methods: We retrospectively analyzed the data of 88 patients who underwent bilateral TKA. Before surgery and at discharge, the knee disability and functinal status of the patients were assessed using the Hospital for Special Surgery (HSS) knee score and the Iowa Level of Assistance Scale (ILAS), respectively. The Spearman correlation test was used to assess the correlation between the change in the HSS knee score and the change in the ILAS score.&#x0D; Results: A statistically significant difference was found in the HSS knee score between before surgery and at discharge (p0.05). A moderate relationship was found between the change in the HSS knee score and the change in the ILAS score (r = –0.48, p

Educational Attainment Affects the Early Rehabilitation of Total Knee Arthroplasty in Southwest China.

ObjectiveTo assess if the educational level of patients in Southwestern China will affect the functional recovery after total knee arthroplasty (TKA).MethodsThis retrospective study included a total of 334 patients (48 males, 286 females, with an average age of 68 years, range from 51 to 84 years) who had undergone primary unilateral TKA from March 2017 to April 2018. Patients were screened for enrollment and classified into four groups (illiterate group, the primary school group, high school group, and university group) according to their educational attainment. All patients were monitored for at least 2 years after TKA. The primary outcome was determined using the Hospital for Special Surgery knee (HSS) score at the time of follow‐up. The secondary outcomes were determined using the 12‐Item Short Form Health Survey (SF‐12) and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores, the satisfaction level, and complications of the surgery.ResultsThree hundred and thirty‐four patients were divided into four groups based on their highest educational level: 83 patients in the illiteracy group, 84 in the primary school group, 91 in the high school group, and 76 in the university group. They were followed up for at least 2 years. For the primary outcome, patients with high school and university education had noteworthy better HSS scores on the surgical‐side knee than those in the primary school and illiterate groups (illiteracy group 86.71 ± 5.94 vs primary school group 85.36 ± 5.88 vs high school group 89.48 ± 3.66 vs university group 88.95 ± 3.55; P < 0.05). For secondary outcomes, the mental component summary (MCS) in the university group was significantly lower than the other three groups (P < 0.05). The results of WOMAC scores were consistent with the results of the HSS score: patients in the university group and the high school group had better results when compared with the other two groups (P < 0.05). There were no statistical differences in the comparison of additional indicators and complications among the four groups, but more patients (12 peoples, 15.8%) in the university group were dissatisfied with knee function after TKA.ConclusionIn Southwest China, patients with high school education or above can achieve better joint function after TKA but do not get better postoperative satisfaction, which may be related to the patients' higher surgical expectations for social and mental needs.

A Prediction Modeling Based on the Hospital for Special Surgery (HSS) Knee Score for Poor Postoperative Functional Prognosis of Elderly Patients with Patellar Fractures.

Background The main aim of this study was to develop a nomogram prediction model for poor functional prognosis after patellar fracture surgery in the elderly based on the hospital for special surgery (HSS) knee score. Methods A retrospective analysis of 168 elderly patients with patellar fractures was performed to collect demographic data, knee imaging, and functional prognosis preoperatively and during the 6-month postoperative follow-up period. Good functional prognosis of knee joint was defined as the percentage of HSS knee scores on the injured side relative to the uninjured side ≥ 80% at six-month postoperative review. Multifactorial linear regression analysis and logistic regression analysis were then used to identify risk factors of functional prognosis and develop the nomogram prediction model. Furthermore, the validity and accuracy of the prediction model were evaluated using C-index, area under the curve (AUC), and decision curve analyses. Results The final screening from the 12 potential risk factors yielded three high-risk factors which were included in the nomogram prediction model: advanced age (OR 0.28 (95% CI 0.11-0.67), P = 0.005), sarcopenia (OR 0.11 (95% CI 0.05-0.26), P < 0.001), and low albumin level (OR 1.14 (95% CI 1.02-1.29), P = 0.025). The model had a good predictive ability with an AUC of 0.857 (95% CI (0.783-0.929)) for the training group and a C-index of 0.836 for the overall sample. In addition, the decision analysis curve indicated that the model had good clinical applicability. Conclusion Our predictive model is effective in predicting the risk of poor functional prognosis after patellar fracture surgery in the elderly by assessing high-risk factors such as advanced age, sarcopenia, and serum albumin levels. This prediction model can help clinicians to make individualized risk prediction, early identification of patients at high risk for poor functional outcome, and appropriate interventions.

Changes in the patellar height following open wedge high tibial osteotomy

Genu varum of the knee is a predisposing factor for osteoarthritis of the medial femoro-tibial compartment. High tibial osteotomy is the surgery of choice for such patients. Patello-femoral abnormalities have a negative effect on the prognosis of high tibial osteotomy. The aim of this study is to assess the changes in patellar height after medial open wedge high tibial osteotomy.Our study was performed in kafr el sheikh university hospital, orthopedic department during the period 2018-2019 on 30 patients.All patients were subjected to thorough clinical and radiological examination and follow up of all patients with Modified Hospital for Special Surgery knee scoring scale (modified HSS), was utilized and compared with its pre-operative valuesThere was significant decrease of patellar height from preoperatively postoperatively; this difference was statistically highly significant.The conclusion was that the High tibial osteotomy using the medial opening wedge technique causes reduction in patellar height due to relative joint line elevation and obliquity and it may be almost inevitable after this type of osteotomy.

Midterm Survival of a Varus-Valgus Constrained Implant following One-Stage Revision for Periprosthetic Joint Infection: A Single-Center Study.

Revision total knee arthroplasty (TKA) is challenging to perform in patients with periprosthetic joint infection (PJI) due to the difficulty of eradicating the infection and potential for bone and ligamentous deficits. The current study aimed to evaluate the midterm survival of varus-valgus constrained (VVC) implants used in one-stage revision TKA for chronic PJI at our institution. This retrospective analysis included 132 patients with chronic PJI who underwent one-stage revision using a VVC implant. The average follow-up was 51.6 months (range: 24-85 months). Five-year survival analysis was performed to set recurrent infection and mechanical failure as the end point. Hospital for special surgery (HSS) as functional outcomes was evaluated preoperatively and at the latest follow-up. A total of 12 patients (9.1%) underwent retreatment for reinfection (nine patients) and mechanical failure (three patients). The overall 5-year revision-free survival was 82.7%, the infection-free survival was 91.1%, and the mechanical failure-free survival was 98.3%. The preoperative HSS knee score improved from 35.6 points (range: 24.3-47.7 points) preoperatively to 76.8 points (range: 57.2-87.6 points) at the latest follow-up. Complications were identified in 20 patients (15.2%) which included aseptic osteolysis in 4 cases, acceptable flexion instability in 3 cases, arthrofibrosis in 2 patients, hematomas in 2 cases, calf intermuscular venous thrombosis in 6 patients, and femoral stem tip pain in 3 cases. This is the first study to report the outcomes of one-stage revision using VVC implants for knee PJI. Improved functional outcomes and good midterm survival are demonstrated at an average follow-up of 51.6 months.

Effects of Judet Quadricepsplasty in the Treatment of Post-traumatic Extension Contracture of the Knee.

ObjectiveTo investigate the clinical outcomes and the affecting factors of Judet's quadricepsplasty on the stiffness of post‐traumatic knee flexion.MethodsA retrospective survey was analyzed from June 2015 to October 2018. A total of 15 patients (eight males, seven females; mean age, 48.27 years) with extension contracture of the knee were treated by Judet's quadricepsplasty. All cases were injuries induced by fracture trauma. The mean interval between the initial procedure and quadricepsplasty was 56.2 months (range, 13–276 months). The knee range of motion (ROM) was assessed with a goniometer. The results of the procedure were analyzed by measuring the degrees of flexion of the operated knees at different time points (before, immediately after, and late postoperatively). We evaluated Hospital for Special Surgery (HSS) score, Judet's criteria, change in the degree of knee flexion, and complications.ResultsAll patients were followed up for 14 to 47 months, with an average of 31.53 months. The degree of flexion increased from 23.33° (range, 10°–50°) preoperatively to 107.33° (range, 100°–125°) intraoperatively, followed by a slight fall in the range of flexion in the late postoperative period, which reached an average of 95.33° (range, 60°–115°) in the last follow‐up. The knee joint function was assessed according to the Judet's criteria, eight cases (53.33%) achieved excellent results, six (40%) good, one (6.67%) fair, and zero (0.00%) poor results at final follow‐up. The long‐term excellent and good rate was 93.33%. The range of flexion of the knee during operation and at the last time of follow‐up was better than that before surgery (P < 0.001). The final flexion was significantly lower than that measured at immediate postoperative (P < 0.001). The mean postoperative HSS score for the entire group was 93.73 (range, 89–96). Fifteen excellent results were obtained according to the HSS knee score. Skin infection was seen in one patient (6.67%). There were no complications such as deep sepsis, intraoperative rupture of the quadriceps tendon, fracture of the lateral femoral condyle, skin dehiscence.ConclusionJudet quadricepsplasty is an effective method to treat knee extension contracture and improve knee range of motion (ROM). It should be performed by an experienced orthopaedic surgeon and followed by physiotherapy with continuous passive motion (CPM). The knee ROM obtained with the surgery has an excellent long‐term effect.

Proximal tibia MIPO locking plate-prospective study of functional outcome for AO/OTA type 41-B, C fracture

Objective: The aim of our study was to evaluate the functional outcome using the HSS knee scoring system and complications of tibia plateau fractures in the Indian population treated with the Locking Anterolateral plate with the MIPO technique. Method: A prospective study was carried out in our institute at Kolhapur. A total number of 57 patients with tibia plateau fracture (AO/OTA type 41-B, C) were studied between March 2019 and Jan 2021. All were treated with an anterolateral locking plate via anterolateral approach and MIPO technique. A mean follow-up of 12 months was carried out, and evaluation was done with the help of the HSS (Hospital for special surgery) Knee scoring system. Result: The mean radiological union time was 16 weeks. The outcome was measured using HSS knee scoring. The average follow up period was 12 months with good patient satisfaction. A total of 11 patients out of 57 reported complications like Non-union (2%), Delayed union (7%), Infection (5.20%) and hardware irritation (5.20%). No case of peripheral neuropathies reported in any of the patients. Conclusion: Locking anterolateral plating via the MIPO technique is a good treatment option showing good clinical outcome in the treatment of tibia plateau fracture (AO/OTA type 41-B, C). It offers a more stable fixation and good functional recovery after the surgery.

CLINICAL AND RADIOLOGICAL RESULTS OF TOTAL KNEE REPLACEMENT USING PATIENT-SPECIFIC POSITIONING GUIDES WITH AT LEAST 5 YEARS OF FOLLOW-UP

Objective: Patient-specific positioning guides have been designed to improve precision in total knee arthroplasty. The aim of this study is to evaluate the medium-term clinical and radiological outcomes with magnetic resonance imaging-based patient-specific positioning guides. Material and methods: We retrospectively reviewed patients from two centers treated with total knee arthroplasty performed with patient-specific positioning guides. We enrolled patients operated on between January 2011 and December 2013, with a minimum follow-up of 5 years. Preoperative and postoperative hip knee angle (HKA) and position of each component in the coronal plane were assessed. Overall malalignment was defined as an outlier of more than [Formula: see text] from the neutral mechanical axis and specific malalignment as when any component showed more than [Formula: see text] of deviation. Clinical outcomes were evaluated using the Hospital for Special Surgery (HSS) knee Score. Results: This study included 68 patients with a mean age of 72 years. The mean postoperative alignment (HKA) was [Formula: see text] and 26.5% of patients showed coronal malalignment [Formula: see text]. Regarding femoral components, 19.1% showed specific malalignment [Formula: see text], while 11.7% of tibial components were classified as outliers. The mean HSS Knee Score at final follow up was 89.2. Patients whose implants were mechanically aligned did not obtain better functional outcomes ([Formula: see text]). Conclusion: In our series, the use of patient-specific positioning guides resulted in a range of mechanical malalignment, similar to conventional instrumentation results reported in the literature.

Porous-coated metaphyseal sleeves and MBT implant for severe bone loss in revision total knee arthroplasty: a mean 2.4-year follow-up

BackgroundPorous-coated metaphyseal sleeves are designed to fill bone loss and facilitate osseo-integration when bone loss occurs during revision total knee arthroplasty (TKA). The purpose of this paper was to evaluate the clinical and radiographic outcomes of porous-coated metaphyseal sleeves for severe bone loss in revision TKA.MethodsForm December 2014 to March 2018, we retrospectively analyzed 36 patients receiving revision TKAs. They had Anderson Orthopaedic Research Institute (AORI) Type II and III tibial bone loss and were treated with metaphyseal sleeve. The patients were followed up for a mean time of 28.5 months. The Knee Society Score (KSS), the Hospital for Special Surgery (HSS) Knee Score, Visual Analog Scale (VAS) score and the range of motion (ROM), radiographic findings of sleeve osteo-integration were also recorded. The paired t test was used to compare the KSS, the HSS knee score and VAS score before and after the revision TKAs. A value of P < 0.05 was considered statistically significant.ResultsThirty-six patients had complete clinical and radiographic data. At the final follow-up (mean: 28.5 months), significant improvements in knee range of motion, KSS, HSS score and VAS score were observed postoperatively (P < 0.001 for all). No aseptic implant fixation failure occurred. Radiographic reviews at the final follow-up revealed that components were stable without occurrence of component migration or clinically significant osteolysis.ConclusionsThis short-term retrospective study illustrated that porous-coated metaphyseal sleeves were useful in revision TKA, with a low rate of intraoperative complications, excellent osteo-integration and stable fixation.

Delayed or neglected meniscus tear repair and meniscectomy in addition to ACL reconstruction have similar clinical outcome.

To compare the clinical outcomes of meniscus repair and meniscus resection with concurrent anterior cruciate ligament (ACL) reconstruction in patients with ACL rupture and neglected or delayed medial meniscus tears. Thirty patients with ACL ruptures and unstable vertical longitudinal medial meniscus tears were included. Patients were divided into two groups. Group I included 15 patients who underwent meniscal repair and Group II included 15 patients who underwent meniscectomy. The knee range of motion, McMurray test, Lachman test, pivot shift test, Lysholm Knee Scoring Scale, International Knee Documentation Committee (IKDC) Questionnaire, Hospital for Special Surgery (HSS) Knee score, and Tegner activity (TA) scale were used to assess all patients. The median follow-up time was 3.6 (0.5-6.5) years. Median age was 28 (16-36) years. Fourteen patients (93.3%) in Group I and six patients (40%) in Group II returned to their preinjury sport activity level (P = .007). Median maximum knee flexion was 132° (121°-140°) in Group I and 134° (121°-139°) in Group II (n.s.). All patients had full knee extension and negative McMurray test results. Lachman and pivot shift test results were similar between groups. The median IKDC Questionnaire score was 99 (86-100) in Group I and 93 (70-100) in Group II (P = .016). The difference in Lysholm Knee Scoring Scale, HSS knee, and TA scale score between groups were not significant. Clinical outcomes of patients that underwent meniscus repair were better than those that underwent meniscus resection with concurrent ACL reconstruction. The technically complicated and costly meniscus repair may achieve better clinical outcomes than meniscectomy when treating a neglected or delayed meniscal tear with a concurrent ACL tear. III.

Adductor canal block is similar to femoral nerve block for the quality of rehabilitation after arthroscopic partial meniscectomy

Adductor canal block (ACB) provides postoperative pain relief as effectively as femoral nerve block (FNB) does, and it preserves the strength of the quadriceps femoris. However, its effect on rehabilitation after arthroscopic partial meniscectomy has not been reported. The purpose of this study was to determine the effect of pre-operative ACB and FNB on the quality of rehabilitation after arthroscopic partial meniscectomy. A total of 150 patients undergoing arthroscopic partial meniscectomy were randomly allocated to the FNB group (receiving 0.3% ropivacaine 30ml at the thighroot-femoral nerve), the ACB group (receiving 0.3% ropivacaine 30ml at mid-thigh adductor canal), or the control group. The primary outcome was the Hospital for Special Surgery (HSS) knee score on the 30th postoperative day. The HSS knee score of the ACB group on the 30th day after the operation was significantly higher than those of the FNB and control groups (88.6 ± 5.3 vs. 85.3 ± 6.9 and 81.2 ± 5.9, respectively; P < 0.05). Both the ACB and FNB groups showed excellent rehabilitation, indicating similar rehabilitation quality for both treatments. ACB is similar to FNB concerning the quality of rehabilitation and pain relief after arthroscopic partial meniscectomy, while ACB has little effect on the strength of the quadriceps femoris. I TRIAL REGISTRATAION: This trial was registered in the Chinese Clinical Trial Registry (ChiCTR-INC-16008346).

Suprapatellar versus infrapatellar approaches in the treatment of tibia intramedullary nailing: a retrospective cohort study

BackgroundTibial shaft fractures are routinely managed with intramedullary nailing (IMN). An increasingly accepted technique is the suprapatellar (SP) approach. The purpose of this study was to compare the clinical and functional outcomes of knee joint after tibia IMN through an suprapatellar (SP) or traditional infrapatellar (IP) approach.MethodsRetrospective analysis was performed in patients with tibial shaft fractures that were treated with IMN through a SP or IP approach between 01/01/2014 and 31/12/2016. The clinical and functional outcomes of the knee were assessed with the Hospital for Special Surgery (HSS) Knee Score. Secondary outcomes included the operation time and intraoperative blood loss.ResultsA total of 50 patients/fractures (26 IP and 24 SP) with a minimum follow-up of 15 months were evaluated. All fractures were OTA 42. No significant differences were found between the two groups in age, gender, side of fractures, operation time, intra-operative blood loss, and follow-up time. No significant difference was seen in HSS score (P = 0.62) between them. Sub analysis of all the HSS components scores revealed no significant differences between pain (P = 0.57), the stand and walk (P = 0.54), the need for walking stick (P = 0.60) and extension lag (P = 0.60). The other HSS components showed full scores (IP 10 vs. SP 10) in both approaches, including muscle force, flexion deformity and stability components. The range of motion (ROM) component score was superior in the IP group (P = 0.04) suggesting a higher ROM.ConclusionsBoth SP and IP approach results in equivalent overall HSS knee scores. However, for the HSS component, the IP approach was superior to SP approach regarding the ROM.