Faculty Bibliography

We retrospectively reviewed the clinical and functional outcomes after operative fixation of ipsilateral fractures of the proximal ulna, radial head or neck, and radial head dislocation (Monteggia variant). Twenty of 25 patients who sustained this injury returned for followup at a mean of 2.3 years and were evaluated by an independent examiner. Radiographically, 17 of 20 fractures united after the index surgery. The three patients who had nonunions develop had Bado Type 2 fracture patterns. The fractures of two patients united after revision internal fixation, and bone grafting. Seven patients had heterotopic ossification develop and 14 of 20 patients had arthritic changes develop. The mean Broberg and Morrey score was 79.1 (range, 32.5-100) and the mean disability of the arm, shoulder and hand score was 64.1 (worse outcome than the general population). Eight of 20 patients required revision surgery (three for recurrent instability, three for nonunion of the ulna, one for radial head excision and hardware removal, and one for hardware removal alone). Nine of 20 patients had fair or poor outcomes according to the Broberg and Morrey scale. Physicians should counsel patients that functional impairment is common after these complex high-energy injuries. LEVEL OF EVIDENCE: Prognostic study, Level IV (case series). See the Guideline for Authors for a complete description of levels of evidence

OBJECTIVES: This study evaluated the use of a staged protocol involving temporary spanning external fixation and delayed formal definitive fixation in the management of high-energy proximal tibia fractures (OTA types 41) with regard to soft-tissue management, development of complications, and functional outcomes. SETTING: Two level-one trauma centers and a tertiary care orthopaedic center. PATIENTS: Fifty-three patients with 57 high-energy tibial plateau fractures. METHODS: The authors instituted a protocol of immediate placement of knee spanning external fixation with management of soft-tissue injuries for all high-energy proximal tibia fractures. Between August 1999 and May 2002, 62 consecutive patients with 67 high-energy proximal tibia fractures (OTA types 41A, B, C) underwent temporary knee spanning external fixation on the day of admission. Nine patients with 10 fractures who transferred care after initial stabilization or sustained an extraarticular fracture were excluded. The remaining 53 patients with 57 fractures underwent repair of articular fractures and meta-diaphyseal fracture repair with plates and screw constructs or conversion to a ring fixator. These patients had a mean age of 47 years (standard deviation (SD), 14). Of these 53 patients, 42 (79%) were men and 11 (21%) were women. Characteristics of the 57 fractures were: 42 Schatzker VI (74%), 12 Schatzker V (21%), 2 Schatzker IV (4%), and 1 Schatzker II (2%). There were 41 closed fractures and 16 open fractures. (One patient had bilateral fractures with 1 extremity open and 1 closed). Orthopaedic evaluation at latest follow-up included a clinical and radiographic examination and functional outcome measurement with the Western Ontario McMaster functional knee score (WOMAC). Eight patients with 8 fractures were lost to follow-up. This left 45 patients with 49 fractures with a mean follow-up of 15.7 (SD, 5.7; range, 8-40) months. RESULTS: Complications included 3 (5%) deep wound infections, 2 (4%) nonunions, and 2 patients (4%) with significant knee stiffness (<90 degrees). Nine patients (16%) underwent additional surgery after definitive skeletal stabilization related to their injury. Range of knee motion at final follow-up was 1 degrees (SD, 4) to 106 degrees (SD, 15). The mean WOMAC was 91 (SD, 55). Poor results did not correlate with demographic or injury characteristics. DISCUSSION: We had a relatively low rate of wound infection in these complex injuries (5% overall). There was only 1 wound problem in our subset of patients with closed fractures and 2 infections in those with open fractures. One downside of this technique may be residual knee stiffness. The benefits of temporizing spanning external fixation include osseous stabilization, access to soft tissues, and prevention of further articular damage. Our relatively low rates of complications in patients who sustain high-energy proximal tibia fractures and the access this technique affords in open fractures and those with compartment syndrome lead us to recommend this technique in all high-energy intra-articular and extra-articular fractures of the proximal tibia. CLINICAL RELEVANCE: This study supports the practice of delayed internal fixation until the soft-tissue envelope allows for definitive fixation

Hip fractures have been among the most studied injury patterns in adults. The number of hip fractures is increasing exponentially, and their treatment costs place great economic strain on society. Recently developed hip fracture treatments, emphasizing cost containment, deformity prevention, and evidence-based medicine, are attempts to optimize patient outcomes. In this article, we outline some of these developments with respect to femoral neck and intertrochanteric fractures

Geriatric fracture patients deserve special considerations in the perioperative period. The goal of geriatric fracture management is restoring mobility and limiting a prolonged recumbency period. A comprehensive multidisciplinary approach involving surgical, medical, rehabilitation, and social work specialists is advocated. Indications, surgical timing, and optimization of comorbid conditions are important issues to be addressed. In addition, anesthesia and postoperative pain control require individual attention in this population. Serving as the background to all these issues are the varied social needs of the elderly who could have a limited support network. This review focuses on the current recommendations for perioperative management of the geriatric patient with a hip fracture

Hip fractures are common injuries in the elderly and are associated with considerable morbidity and mortality. Although technical advances in the treatment of the elderly have resulted in improved fracture fixation and surgical outcomes, clinical pathways have been developed to further improve patient outcome while shortening hospital length of stay after hip fracture. We describe the clinical pathway used since 1990 at the Hospital for Joint Diseases. The outcomes of 747 patients treated before 1990 were compared with outcomes of 318 patients treated at our hospital after initiation of the clinical pathway. Use of the clinical pathway was associated with significant decreases in the acute care hospital length of stay, in-hospital mortality, and 1-year mortality

OBJECTIVE: To review the biomechanical principles that guide fracture fixation with plates and screws; specifically to compare and contrast the function and roles of conventional unlocked plates to locked plates in fracture fixation. We review basic plate and screw function, discuss the design rationale for the new implants, and examine the biomechanical evidence that supports the use of such implants. DATA SOURCES: Systematic review of the per reviewed English language orthopaedic literature listed on PubMed (National Library of Medicine online service). STUDY SELECTION: Papers selected for this review were drawn from peer review orthopaedic journals. All selected papers specifically discussed plate and screw biomechanics with regard to fracture fixation. PubMed search terms were: plates and screws, biomechanics, locked plates, PC-Fix, LISS, LCP, MIPO, and fracture fixation. DATA SYNTHESIS: The following topics are discussed: plate and screw function-neutralization plates and buttress plates, bridge plates; fracture stability-specifically how this effects gap strain and fracture union, conventional plate biomechanics, and locking plate biomechanics. CONCLUSIONS: Locked plates and conventional plates rely on completely different mechanical principles to provide fracture fixation and in so doing they provide different biological environments for healing. Locked plates may increasingly be indicated for indirect fracture reduction, diaphyseal/metaphyseal fractures in osteoporotic bone, bridging severely comminuted fractures, and the plating of fractures where anatomical constraints prevent plating on the tension side of the bone. Conventional plates may continue to be the fixation method of choice for periarticular fractures which demand perfect anatomical reduction and to certain types of nonunions which require increased stability for union

OBJECTIVE: To compare the screw sliding characteristics and biomechanical stability of four-part intertrochanteric hip fractures stabilized with an intramedullary nail using either one large-diameter lag screw (intramedullary hip screw [IMHS]; Smith & Nephew, Memphis, TN) or two small-diameter lag screws (trochanteric antegrade nail [TAN]; Smith & Nephew, Memphis, TN). DESIGN: Laboratory investigation using eight matched pairs of cadaveric human femurs with simulated, unstable intertrochanteric hip fractures. INTERVENTION: One femur of each matched pair was stabilized with an IMHS intramedullary nail, and the other was stabilized with a TAN intramedullary nail. Femurs were statically, then cyclically loaded on a servohydraulic materials testing machine. Finally, all specimens were loaded to failure. MAIN OUTCOME MEASURES: Screw sliding and inferior and lateral head displacements were measured for applied static loads from 500N to 1250N. The same measurements were obtained before and after cyclically loading the specimens at 1250N. Ultimate failure strength of the implant constructs also was determined. RESULTS: There was no significant difference between the TAN and IMHS in static or cyclical loading with respect to screw sliding or inferior and lateral head displacements. There was a statistically significant difference (P < 0.02) in failure strength, with the IMHS construct failing at an average of 2162N and the TAN construct failing at an average of 3238N. CONCLUSION: The two constructs showed equivalent rigidity and stability in all parameters assessed in elastic and cyclical tests. The TAN had a greater ultimate failure load

The accuracy of measuring angulation of stable proximal humerus fractures using the axillary lateral projection was investigated. A closing wedge osteotomy with apex anterior angulation was performed on two cadaveric humeri to simulate a stable surgical neck fracture. One specimen was fixed at 30 degrees angulation and the other at 55 degrees. Axillary radiographs were taken with each specimen articulating with the glenoid of a cadaveric scapula. The humerus was held in neutral rotation. Abduction was set at 30 degrees, 60 degrees, and 90 degrees. In each position of abduction, an axillary lateral radiograph was taken in 30 degrees forward flexion, neutral, and 30 degrees extension to simulate various arm positions. A total of nine radiographs were taken for each specimen. The axillary view is not accurate for measurement of proximal humerus angulation at the arm positions commonly encountered in the trauma setting

BACKGROUND:: Bicondylar tibial plateau fractures are complex injuries, historically associated with high complication rates. The purpose of this study was: 1) to evaluate the clinical use L.I.S.S plating system for stabilization of bicondylar tibial plateau fractures. 2) To compare the biomechanics of this plating system with a double plate construct. METHODS AND MATERIALS:: Thirty-eight patients who sustained a complex tibial plateau fracture (OTA type 41C) at one of three level-one trauma centers were stabilized using the Less Invasive Stabilization System (L.I.S.S.). The cohort of patients was evaluated clinically and radiographically for outcomes at a mean 15 months.In phase 2 of this study a model of a bicondylar tibial plateau fractures was made in six matched pairs of embalmed, human tibia and randomized to fixation with either a L.I.S.S plate or a standard double plate construct. The tibias were then subjected to an axial cyclic load of 500N for 10 cycles (3Hz) to approximate 2 months in vivo and displacements measured. RESULTS:: Thirty-six of /38 (95%) patients united at 4 months after surgery with no loss of fixation nor infection. Two patients underwent prophylactic autogenous bone grafting for bone loss and united by 3 months postgrafting. Significant loss of knee range of motion (<90) was seen in five patients.Biomechanically, no differences in permanent inferior displacement of the medial fragment were found in initial axial loading and after 10 cycles between the two plate constructs. However, when loaded to 500N the L.I.S.S plate construct demonstrated almost twice the displacement of the medial fragment compared with the dual plate construct. No specimen lost fixation during cycling. CONCLUSION:: The L.I.S.S plating system provides stable fixation of complex bicondylar tibial plateau fractures allowing early range of knee motion with favorable clinical results