Phillip M. Mitchell

Surgical training using three-dimensional simulation in placement of cervical lateral mass screws: a blinded randomized control trial

BACKGROUND CONTEXT The skills and knowledge that residents have to master has increased, yet the amount of hours that the residents are allowed to work has been reduced. There is a strong need to improve training techniques to compensate for these changes. One approach is to use simulation-training methods to shorten the learning curve for surgeons in training. PURPOSE To analyze the effect of surgical training using three-dimensional (3D) simulation on the placement of lateral mass screws in the cervical spine on either cadavers or sawbones. STUDY DESIGN A blinded randomized control study. METHODS Fifteen orthopedic residents, postgraduate year (PGY) 1 to 6, were asked to simulate Magerl lateral mass screw trajectories from C3-C7 on cadavers using a navigated drill guide, but with no feedback as to the actual trajectory within the bone (Baseline 1). This was repeated to determine baseline accuracy (Baseline 2). They were then randomized into three groups: Group 1, control, did not receive any training, whereas Groups 2 and 3 received 3D navigational feedback as to the intended drill trajectory on sawbones and cadavers, respectively. All three groups then performed final simulated drilling (final test). All 3D images were deidentified and reviewed by a blinded single fellowship-trained orthopedic spine surgeon. Each image/screw was measured for the starting site, caudad/cephalad angle, and medial/lateral angle to determine trajectory accuracy. RESULTS The aggregate mean difference from a perfect screw was compiled for each session for each group. A negative difference shows improvement, whereas a positive difference shows regression. The difference between final test and Baseline 1 in the control group was 2.4°, suggesting regression. In contrast, the differences for groups sawbone and cadaver were -8.2° and -7.2°, respectively, suggesting improvement. When comparing the difference in aggregate sum angle for the sawbones and cadaver groups with the control group, the difference was statistically significant (p<.0001). CONCLUSIONS Training with 3D navigation significantly improved the ability of orthopedic residents to properly drill simulated lateral mass screws. As such, training with 3D navigation may be a useful adjunct in resident surgical education.

Olecranon fractures: factors influencing re-operation

PurposeWe evaluated factors influencing re-operation in tension band and plating of isolated olecranon fractures.MethodsFour hundred eighty-nine patients with isolated olecranon fractures who underwent tension band (TB) or open reduction internal fixation (ORIF) from 2003 to 2013 were identified at an urban level 1 trauma centre. Medical records were reviewed for patient information and complications, including infection, nonunion, malunion, loss of function or hardware complication requiring an unplanned surgical intervention. Electronic radiographs of these patients were reviewed to identify Orthopaedic Trauma Association (OTA) fracture classification and patients who underwent TB or ORIF.ResultsOne hundred seventy-seven patients met inclusion criteria of isolated olecranon fractures. TB was used for fixation in 43 patients and ORIF in 134. No statistical significance was found when comparing complication rates in open versus closed olecranon fractures. In a multivariate analysis, the key factor in outcome was method of fixation. Overall, there were higher rates of infection and hardware removal in the TB compared with the ORIF group.ConclusionsOur results demonstrate that the dominant factor driving re-operation in isolated olecranon fractures is type of fixation. When controlling for all variables, there is an increased chance of re-operation in patients with TB fixation.

Decreased infection rates following total joint arthroplasty in a large county run teaching hospital: a single surgeon's experience and possible solution.

Total joint arthroplasty is a common orthopaedic procedure producing valuable improvements in patients quality of life. A dreaded complication of this procedure is deep seated, periprosthetic infection. This complication can lead to multiple reoperations and upwards of

No Incidence of Postoperative Knee Sepsis With Suprapatellar Nailing of Open Tibia Fractures.

100,000 of increased cost burden. At one 900 bed county run teaching hospital, with a historically high infection rate in total joints, the total joint service was closed and restarted using a new protocol, dropping infection rates from 12.9% to 1.9% (P = 0.007).

Posterior to Anteriorly Directed Screws for Management of Talar Neck Fractures

Objective: To evaluate the incidence of knee sepsis after suprapatellar (SP) nailing of open tibia fractures. Design: Retrospective; Setting: ACS level 1 trauma center. Patients/Participants: We reviewed 139 open tibia fractures that underwent SP nailing as definitive treatment over a 5-year period (January 1, 2011 to January 1, 2016). Most patients (90%, n = 126) underwent intramedullary nailing at the time of their initial surgery. We defined knee sepsis as intra-articular infection requiring operative debridement, either open or arthroscopically, within 1 months time. Intervention: Open tibia fractures treated with an SP tibial nail. Main Outcome Measurements: Demographic data, fracture characteristics, Gustilo and Anderson classification of open fractures, and occurrence of knee sepsis. Results: In 139 open tibia fractures, there were no cases of knee sepsis in the 30 days after treatment with an SP intramedullary nail. Eighty-seven percent of our cohort had Gustilo and Anderson type II (41%) or type III (46%) open fractures. Most open fractures (83%) underwent primary wound closure during the index procedures. Twenty-five limbs (18%) had evidence of infection at the open fracture site of their open fracture necessitating operative intervention and/or antibiotics: none, however, developed knee sepsis. Conclusions: Although the SP approach carries intra-articular risks, we found a low risk of knee sepsis using this technique in the treatment of open tibia fractures. Our data suggest that there is no greater risk of intra-articular infection using an SP portal as compared with an infrapatellar one. Level of Evidence: Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Orthopaedic trauma and the evolution of healthcare policy in America.

Background: Screws placed from posterior to anterior have been shown to be biomechanically and anatomically superior in the fixation of talar neck and neck-body fractures, yet most surgeons continue to place screws from an anterior start point. The safety and efficacy of percutaneously applied posterior screws has not been clinically defined, and functional outcomes after their use is lacking. Methods: After institutional review board approval, we performed a retrospective review of 24 consecutive talar neck fractures treated by a single surgeon that utilized posterior-to-anterior screw fixation. Clinical, radiographic, and functional outcomes were assessed at a minimum follow-up of 12 months. Functional outcomes including the American Orthopaedic Foot & Ankle Society (AOFAS) hindfoot score, Olerud-Molander Scores, and the Short Form 36 (SF-36) measurement were collected and reviewed. Average patient follow-up was 44 months. Results: According to the classification system of Canale and Kelly, there were 4 type I fractures, 15 type II fractures, 4 type III fractures, and 1 type IV fracture. Four patients had open fractures. One superficial wound infection occurred, 1 patient reported FHL stiffness, and 6 complained of numbness or paresthesias in the distribution of the sural nerve (5 transient, 1 permanent). One reoperation was required to exchange a screw impinging on the talonavicular joint. Radiographically, 44% developed a positive Hawkins sign, and the specificity of this finding was 100% for talar dome viability. Avascular necrosis developed in 43% of patients, with 33% revascularizing and none going on to collapse. Subtalar arthrosis developed in 62% of patients. Conclusion: Screws placed from posterior to anterior are a useful technique in the treatment of talar neck fractures. Functional outcomes following their use appear favorable compared with recent reports with minimal risk to local structures. Level of Evidence: Level IV, retrospective case series.

Comparison of Ankle Fusion Rates With and Without Anterior Plate Augmentation.

Summary: Healthcare policy has changed drastically, and with the 50-year anniversary of the passage of Medicare approaching in 2015, the authors evaluate the development of the current healthcare system and its relationship to the development of modern orthopaedic trauma. With more changes in healthcare policy forthcoming, it is increasingly important for the orthopaedic traumatologist to understand how changes in policy will affect practice. Historically, the motivators for change have remained largely the same over the past 50 years. The development of diagnosis-related groups, the resource-based relative value scale, and the sustainable growth rate are 3 defining policies that were designed to control costs, but which had an unexpected effect on those caring for the trauma population. Healthcare reform has a unique effect on those systems where care is dictated by a defining event or injury. Evaluating the development of trauma systems, the authors find that legislation directed toward the trauma population has been driven by the study of patient outcomes, providing an opportunity for orthopaedic traumatologists to contribute to future changes in policy. As healthcare policy changes begin to take effect, having a thorough understanding of reform and its drivers will be increasingly important in taking an active role in advocating for the field of orthopaedic trauma and its patients.

2017@@@Damage Control Plating in Open Tibial Shaft Fractures: A Cheaper and Equally Effective Alternative to Spanning External Fixation@@@86: 93

Background: The optimal fixation construct for tibiotalar arthrodesis continues to be debated. While biomechanical data and clinical series support anterior plate augmentation, comparative studies assessing its use are sparse. The purpose of this study was to compare the rates of successful tibiotalar arthrodesis with and without anterior plate augmentation of a compression screw construct. Methods: We studied 64 patients (65 ankles) undergoing tibiotalar arthrodesis done by a single surgeon over a 10-year period (2006-2016) with anterior plate augmentation beginning in 2010. Twenty-six ankles had a construct using compression screws only and 39 ankles had anterior plate augmentation of a compression screw construct. We reviewed clinical notes, operative reports, and postoperative radiographs to evaluate for union, incidence of revision, and postoperative complications. Results: The nonunion rate in the compression screw (CS) cohort was 15.4% and 7.7% in the anterior plate augmentation (AP) cohort (P = .33). The revision rate was 7.7% in the CS group and 2.6% in the AP cohort (P = .34). The use of autograft harvested through a separate incision was 19.2% and 17.9% in the CS and AP cohorts, respectively. There were 2 deep postoperative infections in the AP group and none in the patients with CS only (P = .24). There were no superficial wound complications in either group. Conclusion: Anterior plate augmentation was a viable fixation strategy in tibiotalar arthrodesis. In a trend toward an improved rate of fusion and decreased revision rate in the anterior plate augmentation cohort. Level of Evidence: Level III, retrospective comparative series.

13-Year experience in external fixation of the pelvis: complications, reduction and removal

Abstract The purpose of this study was to evaluate damage control plating (DCP) as an alternative to external fixation (EF) in the provisional stabilization of open tibial shaft fractures. Through retrospective analysis, the study found 445 patients who underwent operative fixation for tibial shaft fractures from 2008 to 2012. Twenty patients received DCP or EF before intramedullary nailing with a minimum follow-up of 3 months. Charts and radiographs were reviewed for postoperative complications. Hospital charges were reviewed for implant costs. Nine patients (45%) with DCP and 11 patients (55%) with EF were analyzed. There was no significant difference in the complication rates. The mean implant cost of DCP was

Heterotopic ossification after hemiarthroplasty of the hip – A comparison of three common approaches

1028, whereas mean EF construct cost was