Medial Wall Fractures Research Articles

A Case of Compressive Optic Neuropathy Caused by Orbital Emphysema

Purpose: We report a patient with compressive optic neuropathy (CON) in whom visual acuity (VA) was restored after removing conjunctival emphysema through the conjunctiva.Case summary: A 55-year-old man was transferred to emergency department complaining of decreased VA in the right eye after trauma to the right temporal side of the head. The best-corrected visual acuity (BCVA) was 0.6 in the right eye. We confirmed a relative afferent pupillary defect and limited eye movement inferiorly in the right eye. The patient had blown his nose several times while being transferred to the hospital. On silt-lamp examination, there was conjunctival emphysema of the right eye. Orbital computed tomography showed a medial wall fracture of the right orbit and orbital emphysema above the optic canal. The P100 wave was delayed in the visual evoked potential (VEP) exam, and there was a decreased peripheral visual field on the Humphrey visual field test. Based on these findings, we diagnosed CON and treated him accordingly. To decompress the intra-orbital area, we injected mannitol intravenously, applied intraocular pressure-lowering and antibiotic eye drops in the right eye, and removed part of the conjunctival emphysema through the conjunctiva. At the 3-week follow-up, the BCVA had improved to 1.0 in the right eye with a normalized P100 wave on the VEP exam.Conclusions: In a case of CON caused by orbital emphysema after trauma, it is important to decrease the intra-orbital pressure as soon as possible to enable a good prognosis for the VA.

Assessing the need for specialty consultation for isolated medial orbital wall fractures

ObjectiveThis objective was to assess if the current practice of interfacility transfer and immediate specialty consult is justified by the rate of surgical repair for isolated medial orbital wall fractures. Study DesignThis is a retrospective descriptive study utilizing the records of all patients with isolated medial orbital wall fractures who presented to the ED at Boston Medical Center from January 2014 to December 2022. A descriptive analysis was completed. Results65 patients with isolated medial orbital wall fractures were identified. No patient underwent surgical intervention for repair of their fracture. 15% of the patients were transferred from an outside facility. The facial trauma team was consulted for 70% of the patients. Concomitant consultation of the ophthalmology and facial trauma teams occurred for 54% of the patients. Patients with no specialty consult had the shortest average length of ED stay. The no-show rate for follow-up appointments was 70%. ConclusionsThe absence of surgical repair for isolated medial orbital wall fractures across multiple surgical specialties, multiple attending providers, a wide age range, and all mechanisms of injury along with a 70% follow-up no-show rate may call into question the conventional approach of interfacility transfer and specialty consult for these fractures.

Analysis of risk factors for patients with traumatic optic neuropathy and comparison of visual outcomes of management strategies

BackgroundTraumatic optic neuropathy (TON) is a rare complication of facial trauma that results in vision loss. Clinical diagnosis of TON is based on a history of head trauma and an ophthalmic examination; however, the risk factors for TON and the ideal treatment strategy remain undetermined. This study investigated the predictive risk factors for TON and analyzed the effectiveness of current treatments with respect to visual outcomes in patients with TON. MethodsThis study retrospectively enrolled patients with periorbital facial bone fracture between 2008 and 2019. Initial facial bone computed tomography, ophthalmic exam results, initial Glasgow Coma Scale, and Injury Severity Score (ISS) were recorded. This study classified patients into 4 intervention groups (i.e., medication, surgery, combination therapy, and observation) to compare the outcome of visual acuity. ResultsThis study enrolled 1168 patients with facial bone fractures, 93 (7.96%) of whom were diagnosed as having TON. Independent risk factors for TON included optic canal fracture, medial orbital wall fracture, retrobulbar hematoma, and head Abbreviated Injury Scale ≥ 4. Patients with TON who initially presented with no light perception tended to have poor final visual acuity (VA) outcomes. The results indicated no significant difference in VA improvement among patients receiving observation, mega-dose corticosteroid therapy, surgical decompression, or combined steroid therapy and decompression. ConclusionClinicians can achieve early prediction of TON in patients with an initial unconscious state and the determined risk factors. The results indicated that conservative observation yielded noninferior VA outcomes in patients with TON compared with those receiving medication or surgical treatment.

Efficacy of Nasal Septal Complex in the Endoscopic Reconstruction of Medial Orbital Wall.

The aim of this study is to investigate the efficacy of nasal septal complex reconstructing the medial orbital wall under some specific circumstances. The authors performed a study that included 10 patients who underwent isolated medial orbital wall fracture (blow-out fracture). All the reconstruction surgery of the patient included in this study fixed defect of medial orbital wall using autologous nasal septal complex (composed of nasal septal cartilage and perpendicular plate of ethmoid). The authors observed postoperative improvements of diplopia or ocular motility disorders of the affected orbit. The surgeries had gained satisfactory results, and without severe postoperative complications. After long-term follow-up, postoperative CT indicated the implant-covered defect of medial orbital wall, and there's no incarceration of the medial rectus. Meanwhile, the authors found there is no crack in the implant, and the surgery using nasal septal complex achieved premorbid orbital form. Autologous nasal septal complex provides a better complement to endoscopic reconstruction of medial orbital wall; this strategy allows nasal septum to reconstruct isolated medial orbital wall defects of various degrees, such as nasal septum fracture and dysplasia of perpendicular plate of ethmoid.

Efficacy of Fat and Perifascial Areolar Tissue Graft in Refractory Esotropia: A Case Report

Purpose: This case report presents a novel approach for the management of refractory esotropia using adhesiolysis and fat and perifascial areolar tissue (PAT) transplantation.Case summary: A 62-year-old male presented with left eye strabismus fixus following iatrogenic medial rectus (MR) muscle injury and medial orbital wall fracture during endoscopic sinus surgery. One month later, he underwent MR laceration repair and orbital wall reconstruction. Despite three subsequent interventions for exotropia and its subsequent conversion to esotropia, the left eye esodeviation progressively worsened, culminating in strabismus fixus. Initial examination revealed significant left eye esotropia with fixed gaze and 5-mm enophthalmos. Surgery included implant removal, adhesiolysis between the eyeball and surrounding tissues, scar and MR recession, and placement of a fat and PAT graft on the medial aspect of the eyeball to prevent postoperative re-adhesion. Three years of follow-up demonstrated sustained orthophoria in primary gaze with improved extraocular muscle function and enophthalmos.Conclusions: Fat and PAT graft has potential in oculoplastics for preventing re-adhesion and augmenting orbital volume in patients with refractory restrictive strabismus due to multiple surgeries.

Management of Isolated Medial Orbital Wall Fracture with Intraoral Periapical X-ray Film: A Case Report with Literature Review

Management of Isolated Medial Orbital Wall Fracture with Intraoral Periapical X-ray Film: A Case Report with Literature Review

The “Rocky” Factor: Minimizing Globe Injury in Subsequent Orbital Floor Fractures in Repeat Offenders

Background: Recurrent or repeat orbital floor and/or medial wall fractures may have an increased risk of globe injury and vision loss. To see if the initial orbital floor repair technique and/or chosen material for reconstruction impact the result, we studied repeat offenders who engage in: (1) repeat assaults, (2) unprotected sports injuries, or (3) seizure disorders. Methods: From 715 patients who underwent traumatic orbital floor repair over an 18-year period, 58 “repeat offenders” suffered a subsequent orbital fracture and were studied. Type of repair and outcomes including globe injuries were documented. Results: Repeat offenders who had a second orbital fracture had initial repairs with: resorbable plates (63.8%), titanium mesh (12.1%), and split cranial bone grafts (14%). More significant globe injuries occurred when initial repair was with titanium plates (86%) and bone grafts (14%) compared to resorbable plates (0%). Of the total group with initial orbital fractures and repair, 15% were categorized as “at risk” to be repeat offenders based on their medical history and activity. Of the “repeat offenders” who had an additional orbital fracture, 95% (50/58) fell into the “at risk” category for “repeat offending.” Conclusion: Resorbable plate orbital floor and/or medial wall fracture repair may offer less significant globe injury for repeat offenders at risk for subsequent orbital trauma.

Clinical Significance of the Inferomedial Orbital Strut in Orbital Blowout Fractures: Incidence of Symptomatic Diplopia in a Fractured vs. Intact Strut.

Background/Objectives: This study aims to compare the clinical findings, particularly symptomatic diplopia, associated with an inferomedial orbital strut fracture versus intact strut and to determine the clinical significance of the inferomedial orbital strut in patients with orbital floor and medial orbital wall fractures. Methods: A 10-year retrospective observational study involving orbital blowout fracture cases was conducted in our institution. Patients with fractures of the orbital floor medial to the infraorbital groove and medial orbital wall, as seen on computed tomography (CT) scans, were included in this study. Patients with concomitant orbital rim fracture and those with old orbital fractures were excluded. Fracture of the inferomedial orbital strut was diagnosed via coronal CT images and patients were classified into those with an inferomedial orbital strut fracture and those without. Results: A total of 231 orbits from 230 patients was included in the study (fractured strut on 78 sides and intact strut on 153 sides). Approximately 2/3 of patients in both groups had the field of binocular single vision in primary position upon first examination (p = 0.717). Patients with strut fractures demonstrated only comminuted or open fractures, while those without strut fractures showed diverse fracture patterns (p < 0.001). Conclusions: Inferomedial orbital strut fracture does not automatically result in diplopia in patients with orbital blowout fractures. The integrity of the orbital periosteum plays a more essential role in hampering extraocular muscle displacement, thereby preventing symptomatic diplopia in these patients.

Prediction of substantial closed-globe injuries in orbital wall fractures.

To determine risk factors for substantial closed-globe injuries in orbital fractures (SCGI) and to develop the best multivariate model for the prediction of SCGI. A retrospective study was performed on patients diagnosed with orbital fractures at Farabi Hospital between 2016 and 2022. Patients with a comprehensive ophthalmologic examination and orbital CT scan were included. Predictive signs or imaging findings for SCGI were identified by logistic regression (LR) analysis. Support vector machine (SVM), random forest regression (RFR), and extreme gradient boosting (XGBoost) were also trained using a fivefold cross-validation method. A total of 415 eyes from 403 patients were included. Factors associated with an increased risk of SCGI were reduced uncorrected visual acuity (UCVA), increased difference between UCVA of the traumatic eye from the contralateral eye, older age, male sex, grade of periorbital soft tissue trauma, trauma in the occupational setting, conjunctival hemorrhage, extraocular movement restriction, number of fractured walls, presence of medial wall fracture, size of fracture, intraorbital emphysema and retrobulbar hemorrhage. The area under the curve of the receiver operating characteristic for LR, SVM, RFR, and XGBoost for the prediction of SCGI was 57.2%, 68.8%, 63.7%, and 73.1%, respectively. Clinical and radiographic findings could be utilized to efficiently predict SCGI. XGBoost outperforms the logistic regression model in the prediction of SCGI and could be incorporated into clinical practice.

Endoscopic Dacryocystorhinostomy Following Nasolacrimal Drainage System Trauma and Medial Orbital Wall Reconstruction

Study Design Case series. Objective To describe the assessment and surgical approach to dacryocystorhinostomy (DCR) for patients with nasolacrimal duct obstruction (NLDO) in the presence of orbital wall hardware. Methods The pre-operative assessment, management and outcomes of two patients with secondary acquired NLDO following medial orbital wall fracture repair treated by nasal endoscopic DCR. Results Anatomical and functional success was achieved in both cases at 6 weeks post operatively without disruption of the orbital plate. There was persistent success at 1 and 3 years’ post-operatively. Conclusions Endoscopic DCR is a good option for the treatment of NLDO in patients with previous medial orbital wall fracture repair where the location of the plate may complicate the external approach.

Mid-term Results of Total Hip Arthroplasty for Posttraumatic Osteoarthritis after Acetabular Fracture.

The prognosis of total hip replacement (THR) after open reduction and internal fixation (ORIF) versus THR following non-operative treatment of acetabular fractures is unclear. Few studies have been conducted in this regard. Therefore, the purpose of the current study was to perform an assessment and compare the functional outcomes for study subjects in the ORIF and non-ORIF groups during the follow-up period compared to baseline. This longitudinal comparative study, which included 40 patients who underwent THR for either posttraumatic arthritis after fixation of an acetabular fracture or arthritis following conservative management of a fracture, was conducted for 60 months. Twenty-four patients had undergone ORIF, and 16 patients had undergone nonoperative/conservative management for acetabular fractures. Following THR, the patients were followed up for monitoring of functional outcomes for the Harris hip score (HHS) and comparison between the ORIF and non-ORIF groups was performed. The HHS showed significant improvement in both ORIF and non-ORIF groups. At the end of the mean follow-up period, no significant variation in scores was observed between the groups, i.e., ORIF group (91.61±6.64) compared to non-ORIF group (85.74±11.56). A significantly higher number of re-interventions were required for medial wall fractures and combined fractures compared to posterior fractures (P<0.05). THR resulted in improved functional outcome during follow-up in both the groups; however, the ORIF group was observed to have better functional outcome. Re-intervention was not required for any of the posterior fractures at the end of the mean follow-up period.

How to Reduce Inferomedial Orbital Wall Fracture Using a Navigation System: Tips and Pearls.

The orbit is a confined space with a defined bony structure. Bony protrusion into the ethmoid or maxillary sinuses by the blowout fracture can displace orbital tissues, including rectus muscles and adjacent fascial septae. Especially, reconstructing the orbit's floor and medial wall can be challenging when the inferomedial strut or posterior bony ledge is affected, leading to a loss of critical anatomic landmarks and support. Correctly positioning an implant in the precise anatomic location can be challenging. Recent updates to the navigation system have addressed this issue. Despite its early application, using a navigation system in these orbital fractures advances plastic surgeons in a way that has more confidence and accuracy in surgical planning. The video demonstrates how these 2 can be combined in an operating room. Intraoperatively, the authors check the superior, anterior, and posterior ends of the medial wall fracture and the posterior end of the floor fracture. A single orbital implant was trimmed and reshaped to match defect measurements. The implant placement was meticulously executed to repair the fracture while ensuring the inferior oblique muscle was not injured. After confirming the correct placement of the implant, it was secured to the inferior orbital rim using a single screw. Depending on the medial orbital wall fracture depth or degree of soft tissue herniation, the authors used an artificial dermal matrix or trimmed absorbable mesh plate to cover the uppermost part of the medial wall fracture to prevent postoperative enophthalmos. Finally, a forced duction test was performed. Our study shows that navigation-assisted inferomedial orbital wall reconstruction using materials readily available in the market is safe and effective.

ORBITAL TRAUMA IN A CHILD WITH RETROBULBAR HEMORRHAGE

Introduction : Retrobulbar hemorrhage vision threatening condition associated with cranio- facial trauma. Rapidly fill the orbit and cause an “orbital compartment syndrome” that subsequently cuts off perfusion to vital ocular structures. Treatment must be initiated immidietly to prevent permanent visual loss.&#x0D; Case Illustration : 10-year-old boy, with left eye blurring of vision, swelling and multiple facial injury post motor accident. Visual acuity was perception of light on left eye, 6/5 and right eye with upper and lower lid laceration wounds. He had a dense afferent pupillary defect and the ocular movements of the left eye were limited in all directions of gaze. The orbit was tense with significant resistance to retropulsion. Diagnosed with acute retrobulbar haemorrhage following blunt trauma with medial wall fracture. Intravenous acetazolamide and timolol was commenced continued with emergency lateral canthotomy. His vision immediately improved to 6/60 and 3 hours later was 6/18. He was treated for left traumatic optic neuropathy with IV Mehtylprednisolone for 3 days followed two weeks oral prednisolone&#x0D; Discussion :&#x0D; Conclusion : Retrobulbar haemorrhage is a vision-threatening emergency often necessitating immediate lateral canthotomy for preservation of vision. In children, as the optic nerve canal is smaller, a lesser volume is available for the nerve to expand, thus early visual impairment could occur following trauma. Prompt recognition and appropriate treatment of this ocular emergency is imperative, for timely management determines the ultimate outcome.

ORBITAL TRAUMA IN A CHILD WITH RETROBULBAR HEMORRHAGE

Introduction : Retrobulbar hemorrhage vision threatening condition associated with cranio- facial trauma. Rapidly fill the orbit and cause an “orbital compartment syndrome” that subsequently cuts off perfusion to vital ocular structures. Treatment must be initiated immidietly to prevent permanent visual loss.&#x0D; Case Illustration : 10-year-old boy, with left eye blurring of vision, swelling and multiple facial injury post motor accident. Visual acuity was perception of light on left eye, 6/5 and right eye with upper and lower lid laceration wounds. He had a dense afferent pupillary defect and the ocular movements of the left eye were limited in all directions of gaze. The orbit was tense with significant resistance to retropulsion. Diagnosed with acute retrobulbar haemorrhage following blunt trauma with medial wall fracture. Intravenous acetazolamide and timolol was commenced continued with emergency lateral canthotomy. His vision immediately improved to 6/60 and 3 hours later was 6/18. He was treated for left traumatic optic neuropathy with IV Mehtylprednisolone for 3 days followed two weeks oral prednisolone&#x0D; Discussion :&#x0D; Conclusion : Retrobulbar haemorrhage is a vision-threatening emergency often necessitating immediate lateral canthotomy for preservation of vision. In children, as the optic nerve canal is smaller, a lesser volume is available for the nerve to expand, thus early visual impairment could occur following trauma. Prompt recognition and appropriate treatment of this ocular emergency is imperative, for timely management determines the ultimate outcome.

ORBITAL TRAUMA IN A CHILD WITH RETROBULBAR HEMORRHAGE

Introduction : Retrobulbar hemorrhage vision threatening condition associated with cranio- facial trauma. Rapidly fill the orbit and cause an “orbital compartment syndrome” that subsequently cuts off perfusion to vital ocular structures. Treatment must be initiated immidietly to prevent permanent visual loss.&#x0D; Case Illustration : 10-year-old boy, with left eye blurring of vision, swelling and multiple facial injury post motor accident. Visual acuity was perception of light on left eye, 6/5 and right eye with upper and lower lid laceration wounds. He had a dense afferent pupillary defect and the ocular movements of the left eye were limited in all directions of gaze. The orbit was tense with significant resistance to retropulsion. Diagnosed with acute retrobulbar haemorrhage following blunt trauma with medial wall fracture. Intravenous acetazolamide and timolol was commenced continued with emergency lateral canthotomy. His vision immediately improved to 6/60 and 3 hours later was 6/18. He was treated for left traumatic optic neuropathy with IV Mehtylprednisolone for 3 days followed two weeks oral prednisolone&#x0D; Discussion :&#x0D; Conclusion : Retrobulbar haemorrhage is a vision-threatening emergency often necessitating immediate lateral canthotomy for preservation of vision. In children, as the optic nerve canal is smaller, a lesser volume is available for the nerve to expand, thus early visual impairment could occur following trauma. Prompt recognition and appropriate treatment of this ocular emergency is imperative, for timely management determines the ultimate outcome.

UNSALVAGEABLE EYE: HOW CAN WE DO MORE?

Introduction : Unsalvageable eye, consisting of total visual loss, orbital wall fracture, and disfigured globe, is devastating for both patients and caretakers. This impairment is a challenge for ophthalmologists to manage. Although visual rehabilitation is impossible, the appropriate management results in outcome that would improve patient’s quality of life (QoL). We aim to report our successful case of orbital reconstruction with satisfactory outcome.&#x0D; Case Illustration : A 75-year-old male presented to our clinic with total visual loss of right eye (RE) after motorcycle accident three months prior. Examination revealed phthisical RE, partially-healed full-thickness inferior palpebral laceration, and inferomedial blow out fracture (BOF). Electroretinography and visual evoked potential examination showed a decrease of right optic nerve conduction. The patient expressed discontentment with his current physical condition. Simultaneous procedures of orbital floor and medial wall fracture repair using silicone block followed by lid reconstruction, and mucous membrane grafting for ocular surface were performed. An ocular prosthesis was fitted. The patient was pleased with the outcome.&#x0D; Discussion : Ophthalmologists are often left with little room to aid patients with this condition. More can be done to unsalvageable eye cases. This case shows that improvement of patient’s QoL can be achieved by orbital reconstruction and ocular prosthesis fitting.&#x0D; Conclusion : The main objective of managing unsalvageable eye is to restore patient’s orbital anatomical features, hence, improving his QoL.

Association of Ocular Injuries in Patients with Head Injury: A Tertiary-Level Armed Forces Experience

ABSTRACT Introduction: The incidence of trauma is on an increasing trend worldwide. It has drastically increased due to urbanization, vehicular congestion, alcoholism, and poor infrastructure facilities, especially in developing countries. In the Armed Forces, the additional burden of trauma is also seen due to various unit activities, organized sports, and other adventure sports. Head injury cases are often associated with various ocular injuries. These ocular injuries, if subtle in nature, can be missed initially and progress into ophthalmological complications and rarely into permanent visual impairment. The aim of this study was to critically analyze the association of various ocular injuries in patients with head injury. Materials and Methods: A cross-sectional study was conducted in a tertiary-level Armed Forces Hospital from July 2016 to December 2018. A total of 40 patients were evaluated who had head injury along with ocular injuries. The Glasgow Coma Scale (GCS) was used to assess the severity of the head injury. Ocular manifestations such as subconjunctival hemorrhage, ecchymosis, soft tissue injuries such as lid tear, corneal injuries, and bony and associated nerve injuries were evaluated. Results: A total of 40 patients with head injury with ocular manifestations were studied. Road traffic accident (RTA) was the most common cause, followed by accidental fall from height and sports injuries. There was a male preponderance (n = 32 (80%)) over females (n = 8 (20%)). Unilateral ocular manifestation (n = 32 (80%)) was more common than bilateral involvement (n = 8 (20%)). The most frequent ocular manifestations were subconjunctival hemorrhage and ecchymosis (35 (87.5%)), followed by lid laceration (6 (15%)), corneal tear (04 (10%)), vitreous hemorrhage (01 (2.5%)), evisceration (2 (05%)), and cranial nerve injury (06 (12.5%)). Orbital wall fracture was seen in 15 (37.5%) patients, including lateral wall fracture (n = 08 (20%)), medial wall fracture (n = 04 (10%)), orbital floor fracture (n = 02 (05%)), and orbital roof fracture (n = 01 (2.5%)). Conclusion: Ocular injuries can occur in patients with head injury irrespective of the mode and kinematics involved (severe head injury may present with minimal ocular manifestations or vice versa). These patients require hospitalization, observation, thorough ophthalmic evaluation, and periodic assessment to minimize morbidity and complications.

Eyeing risks: Navigating ophthalmic challenges in sinus surgery

This is a descriptive case report of a 25-year-old male who presented with right eye diminution of vision associated with ophthalmoplegia and strabismus following functional endoscopic sinus surgery (FESS) for deviated nasal septum. On examination, he had a large angle right exotropia with enophthalmos and restricted extra ocular movements. Pupils were dilated and fixed suggestive of optic neuropathy and fundus revealed a central retinal artery occlusion. Multimodal radiological imaging revealed optic nerve sheath hematoma, fracture of medial orbital wall and orbital floor along with medial rectus disinsertion with posterior discontinuation. Due to delayed presentation at our clinic, he was managed conservatively with intravenous and oral corticosteroids. The patient displayed mild improvement in ocular movement and vision. He was advised orbital reconstruction of the medial wall and floor for enophthalmos correction and cosmesis. Although a relatively safe procedure, FESS can result into varied orbital complications, including damage to the extraocular muscles, optic nerve and its vascular supply. This case report, to the best of our knowledge is the first of its kind to document ophthalmoplegia due to medial rectus disinsertion along with central retinal artery occlusion. It also highlights the perioperative risk factors and provides insight into the intraoperative signs to be cautious of during sinus surgeries

Insights into orbital morphological features and fracture patterns in medial and inferior wall fracture: a retrospective cohort study

This study investigated the orbital morphological features that lead to fractures at different sites by comparing patients with isolated inferior wall fracture (IWF) to patients with isolated medial wall fracture (MWF). This study analyzed the orbital morphologic characteristics of all orbital fracture patients who underwent orbital computed tomography (CT) scans between January 2017 and October 2022. On CT scans, the bony structures of the orbit were measured. We investigated the bilateral symmetry of orbital. In addition, orbital morphological differences were compared between patients with fractures of the medial wall and those with fractures of the inferior wall. A total of 135 patients with orbital fractures were included in the study. Of these, 91 were isolated MWFs and 44 were isolated IWF. We confirmed the symmetry of bilateral orbits and measured the orbit of the uninjured side. No differences were found between the MWF group and the IWF group in terms of ocular prominence, horizontal orbital diameter, orbital rim angle, sagittal orbital depth, sagittal orbital depth, and angle of inferior wall inclination. The distance between the infraorbital nerve (ION) entry point and the orbital rim was significantly smaller in the inferior lateral wall fracture group than in the MWF group (11.87 ± 2.54 vs 14.90 ± 4.64, P < 0.001), and the percentage of type 1 ION was significantly lower in the IWF group than in the MWF group (40.9% vs 65.9%, P = 0.012). We demonstrated the symmetry of bilateral orbits and found that when the point where the ION enters the infraorbital canal is near the orbital rim, patients are more prone to suffering a fracture of the inferior wall after orbital trauma. It is less likely for patients with type 1 ION to suffer an IWF following an orbital fracture.

Reconstruction of Medial Orbital Wall Using Autologous Perpendicular Plate of Ethmoid.

The aim of this study is to investigate the feasibility of perpendicular plate of ethmoid as material for the reconstruction of medial orbital wall. The main outcome measurement was preoperative and postoperative orbital volume. The authors performed a study including 17 patients who have isolated medial orbital wall fracture (blow-out fracture). All the patients were fixed the defect using autologous perpendicular plate of ethmoid under endonasal approach. The authors compared the preoperative and postoperative orbital volume difference (unaffected orbit, affected orbit) of all the patients, and observed the improvement of diplopia or ocular motility disorders after operation. All 17 medial orbital wall reconstruction surgeries were successful with no severe postoperative ophthalmic complications. Statistically significant differences were found between the preoperative and postoperative orbital tissue volumes for the affected orbit. There was no statistically significant difference found between the tissue volume of the contralateral unaffected orbit and the affected orbit after reconstruction. And postoperative computed tomography showed the implant is in place and there is no medial rectus incarceration. Autologous perpendicular plate of ethmoid proved to be safe and effective in the reconstruction of medial orbital wall under endonasal approach with cost-effectivence, low complication rate, high biocompatibility, and minimally invasion.