Capsular distension in high-energy femoral shaft fractures is associated with occult femoral neck fracture: a preliminary retrospective comparative study.

OBJECTIVES: To determine the association between hip capsular distension, the computed tomography (CT) capsular sign, and lipohemarthrosis as they relate to occult femoral neck fracture (FNF) in the setting of ipsilateral femoral shaft fracture (FSF). DESIGN: Retrospective comparative study. SETTING: Level 1 trauma center. PATIENTS/PARTICIPANTS: Two hundred and forty-two patients with high-energy FSF and no evidence of FNF on preoperative radiographs and pelvis CT. All patients were stabilized with non-reconstruction style nails. INTERVENTION: Pelvis CT scans were examined for hip capsular distension irrespective of the other side, differing side-to-side measurements of capsular distension (i.e., the CT capsular sign), and lipohemarthrosis. MAIN OUTCOME MEASUREMENTS: FNF was observed for on postoperative radiographs. Relative risk (RR), number needed to treat (NNT), sensitivity (SN), and specificity (SP) were determined. RESULTS: Fifty-eight patients (24.0%) had capsular distension. Forty-two patients (17.4%) had differing capsular measurements (i.e., the CT capsular sign), and 16 (6.6%) had symmetrical distension from bilateral hip effusions. Eight patients (3.3%) had lipohemarthrosis. Four FNFs (1.7%) were identified. Three patients had capsular distension, 2 had CT capsular signs, and 1 had lipohemarthrosis. The last patient had no CT abnormalities. Only capsular distension (RR = 10, CI = 1.001-90, P = 0.049; SN = 75%, SP = 77%; NNT = 22) and lipohemarthrosis (RR = 23, CI = 1.6-335, P = 0.022; SN = 50%, SP = 96%; NNT = 8) were associated with occult FNF. CONCLUSIONS: Capsular distension is associated with FNF irrespective of the contralateral hip. Preemptive stabilization using a reconstruction nail could be considered in the setting of capsular distension or lipohemarthrosis to prevent displacement of an occult FNF. LEVEL OF EVIDENCE: Diagnostic Level III.

Single-Incision Fasciotomy Decreases Infection Risk Compared with Dual-Incision Fasciotomy in Treatment of Tibial Plateau Fractures With Acute Compartment Syndrome.

OBJECTIVES: Comparison of surgical site infection (SSI) rates in tibial plateau fractures with acute compartment syndrome treated with single-incision (SI) versus dual-incision (DI) fasciotomies. DESIGN: Retrospective cohort study. SETTING: Two, Level-1, academic, trauma centers. PATIENTS: Between January 2001 and December 2021, one-hundred ninety patients with a diagnosis of tibial plateau fracture and acute compartment syndrome met inclusion criteria (SI: n = 127, DI: n = 63) with a minimum of 3-month follow-up after definitive fixation. INTERVENTION: Emergent 4-compartment fasciotomy, using either SI or DI technique, and eventual plate and screw fixation of the tibial plateau. OUTCOMES: The primary outcome was SSI requiring surgical debridement. Secondary outcomes included nonunion, days to closure, method of skin closure, and time to SSI. RESULTS: Both groups were similar in demographic variables and fracture characteristics (all P > 0.05). The overall infection rate was 25.8% (49 of 190), but the SI fasciotomy patients had significantly fewer SSIs compared with the DI fasciotomy patients [SI 18.1% vs. DI 41.3%; P < 0.001; OR 2.28, (confidence interval, 1.42-3.66)]. Patients with a dual (medial and lateral) surgical approach and DI fasciotomies developed an SSI in 60% (15 of 25) of cases compared with 21.3% (13 of 61) of cases in the SI group ( P < 0.001). The nonunion rate was similar between the 2 groups (SI 8.3% vs. DI 10.3%; P = 0.78). The SI fasciotomy group required fewer debridement's ( P = 0.04) until closure, but there was no difference in days until closure (SI 5.5 vs. DI 6.6; P = 0.09). There were zero cases of incomplete compartment release requiring return to the operating room. CONCLUSIONS: Patients with DI fasciotomies were more than twice as likely to develop an SSI compared with SI patients despite similar fracture and demographic characteristics between the groups. Orthopaedic surgeons should consider prioritizing SI fasciotomies in this setting. LEVEL OF EVIDENCE: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Updated Blocking Techniques for Lower Extremity Medullary Nailing: Beyond the Concavity of Deformity.

Modern blocking techniques are useful to achieve anatomic alignment and stable fixation during end-segment nailing. Whether with screws or drill bits, blocking implants can correct both angular and translational deformities. Understanding the biomechanics of blocking implants allows the surgeon to properly plan their placement based on principles rather than dogma. We use case examples to highlight updates in blocking techniques during acute surgical fixation and chronic deformity correction.

A Single Proximal Interlocking Bolt May Be Sufficient for Retrograde Nailing of Extra-articular Femur Fractures.

OBJECTIVE: To evaluate whether a single proximal interlocking bolt was sufficient during the treatment of extra-articular femur fractures with retrograde medullary nailing. DESIGN: Retrospective comparative study. SETTING: Academic Level 1 trauma center. PATIENTS: The study included 136 patients with extra-articular femur fractures treated with retrograde medullary nailing who met inclusion and follow-up criteria. INTERVENTION: The intervention included surgical treatment for a femur fracture with retrograde medullary nailing, with comparisons made between those treated with a single proximal interlocking (1 IL) bolt and those treated with 2 proximal interlocking bolts (2 IL). MAIN OUTCOME MEASUREMENT: The main outcome measurements were as follows: (1) rate of nonunion and (2) rate of catastrophic implant failure. RESULTS: There was no difference in the rate of nonunion requiring surgical intervention between the 2 groups. There were no catastrophic failures in either group. CONCLUSIONS: A single proximal interlocking bolt may be sufficient when using retrograde nailing for the treatment of extra-articular femur fractures. LEVEL OF EVIDENCE: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Reduction and fixation of high-energy proximal tibiofibular joint dislocations: a technical trick.

We present our technique for screw stabilization and our clinical experience treating a series of patients presenting with proximal tibiofibular joint fracture-dislocations.

Operative Management of a Nonunion at the Superior Angle of the Scapula: A Case Report.

CASE: We present the case of a 40-year-old man with a fracture to the superior angle of the scapula who was treated nonoperatively for 10 months-leading to a symptomatic nonunion. The patient underwent reconstruction of the nonunion for a painful shoulder and was followed clinically for 3 years. He demonstrated major improvement in function and symptoms. CONCLUSION: Nonunions of the scapular superior angle can be effectively managed with surgical reconstruction.

External Fixator-Assisted Reduction of Distal Femur Fractures: A Technical Trick.

SUMMARY: Restoration of anatomical alignment while preserving the soft-tissue envelope around the fracture site remains a challenge during distal femur fracture fixation. Although the lateral distal femoral locking plate allows surgeons to achieve adequate bony stability, their application has been associated with malalignment leading to inferior outcomes. We propose a biologically friendly, percutaneous technique that sequentially reduces and aligns distal femur fractures with an anterior external fixator before definitive fixation with a lateral distal femoral locking plate.

Pilon Fractures in Patients Older Than 60 Years of Age: Should We Be Fixing These?

OBJECTIVES: To compare complications after operatively treated pilon fracture between elderly patients (≥60 years) and younger patients (<60 years). DESIGN: Retrospective comparative study. SETTING: Two Level-1 academic trauma. PATIENTS/PARTICIPANTS: Of the 740 tibial plafond fractures (OTA/AO 43-B & 43-C) treated January 2006 through December 2016, 538 patients had a minimum of 1 year follow up. INTERVENTION: Open reduction-internal fixation (ORIF). MAIN OUTCOME MEASUREMENT: Treatment failure defined as either nonunion or arthrosis. RESULTS: A total of 72 patients comprised the elderly group (mean age 66 years) and 466 patients comprised the younger group (mean age 44 years) (P < 0.001). Besides significantly more tobacco use in the younger group, patient demographics and fracture characteristics did not differ. Locking plates were used significantly more in elderly patients (47% vs. 32%, P = 0.01). Using chi-square analysis, we were unable to detect a difference in treatment failure (elderly 43% vs. young 37%, P = 0.33), infection (elderly 10% vs. young 13%, P = 0.4), or malunion (elderly 3% vs. young 4%, P = 1.0). Using regression analysis, age >60 was not associated with treatment failure [odds ratio (OR) 1.2 (0.7-2.1), P = 0.52]. Bone loss (OR 2.7 [1.8-4.1], P < 0.001), open fracture (OR 1.6 [1-2.5], P = 0.03), and malreduction (OR 4.2 [2.5-7.3], P < 0.001) were associated with failure. CONCLUSIONS: Age >60 years is not an independent predictor of surgical treatment failure of pilon fractures as defined by nonunion or arthrosis. This is the largest cohort of pilon fracture in elderly patients and indicates that we should continue to treat elderly patients similar to their younger counterparts using ORIF. LEVEL OF EVIDENCE: Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Risk Factors for Tibial Plafond Nonunion: Medial Column Fixation May Reduce Nonunion Rates.

OBJECTIVES: To identify the incidence and risk factors for development of tibial plafond nonunion. DESIGN: Retrospective comparative study. SETTING: Two Level 1 academic trauma centers. PATIENTS/PARTICIPANTS: Seven hundred forty tibial plafond fractures (OTA/AO 43B3 and 43C) treated January 2006 to December 2015. INTERVENTION: Open reduction and internal fixation. MAIN OUTCOME MEASUREMENT: Nonunion. RESULTS: Five hundred eighteen patients with a mean age of 43 years (range, 18-81 years) and mean follow-up of 27 months (range, 12-115 months) were involved. Seventy-two patients (72/518, 14%) were identified as having a nonunion. Surgical approach was not associated with nonunion in univariate analysis. Multiple regression model 1 identified OTA/AO 43C [odds ratio (OR) = 4.43; 95% confidence interval (CI), 1.01-19.41; P = 0.048], tobacco use (OR = 2.02; 95% CI, 1.10-3.71; P = 0.024), both minimal and substantial bone loss (P = 0.006 and P < 0.001, respectively), and open fracture (OR = 1.96; 95% CI, 1.10-3.48; P = 0.022) as risk factors for tibial plafond nonunion. Model 2 identified locking plate (OR = 1.97; 95% CI, 1.13-3.40; P = 0.016) and failure to treat the medial column (vs. screw P = 0.047, or plate P = 0.038) as risk factors. CONCLUSIONS: The tibial plafond nonunion rate was 14%. Bone loss, open fracture, failure to treat the medial column, locking plates, and tobacco use were all significant risk factors for developing tibial plafond nonunion. Equally important, surgical approach was not significantly associated with plafond nonunion. LEVEL OF EVIDENCE: Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Syndesmosis and Syndesmotic Equivalent Injuries in Tibial Plafond Fractures.

OBJECTIVES: To identify the incidence and fracture characteristics associated with syndesmotic injury in tibial plafond fractures and report the incidence of posttraumatic osteoarthrosis (PTOA). DESIGN: Retrospective comparative study. SETTING: Two level-1 academic trauma centers. PATIENTS/PARTICIPANTS: Of the 735 tibial plafond fractures (OTA/AO 43-B3 and 43-C) treated from January 2006 through December 2015, 108 patients (108/735, 15%) were identified with syndesmosis injury. INTERVENTION: Either acute or missed syndesmotic injury. MAIN OUTCOME MEASUREMENT: PTOA. RESULTS: Fourteen fractures (14/735, 2%) had missed syndesmotic injury. Volkmann fragment of ≤10 mm (P = 0.04) and fibular avulsion fracture (P = 0.05) were significantly more common in missed syndesmosis. Ninety fractures (14/14 missed, 76/94 acute) had greater than 12-month follow-up (mean, 26 months; range, 12-102 months). Nearly all patients with missed syndesmosis injury developed arthrosis (13/14, 93%), and 45% (34/76 fractures) of plafond fractures with acute syndesmosis injury developed arthrosis (P < 0.001). Although controlling for malreduction, patients with missed syndesmosis had significantly more PTOA development (P = 0.018). Controlling for malreduction, patients with syndesmotic fixation and a ≤10-mm Chaput or Volkmann fragment or fibular avulsion fracture (8/31, 26%) were less likely to develop PTOA than if they had a similar fracture pattern without syndesmotic fixation (9/10, 90%) (P = 0.011). CONCLUSIONS: Fifteen percent of tibia plafond fractures have a syndesmosis or syndesmotic equivalent injury. Missed syndesmosis injury has a high rate of PTOA development. Patients with a ≤10-mm Chaput or Volkmann fragment and/or fibular avulsion fracture benefit from syndesmotic fixation. LEVEL OF EVIDENCE: Prognostic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Disengagement and intrapelvic migration of a dynamic helical hip screw.

Some proximal femur fractures may be treated surgically with the use of fracture fixation hardware such as the sliding hip screw and its variants. These devices allow the femoral head and neck fragment to compress against the trochanteric or shaft fragment as the hip screw telescopes into the barrel of the side plate. We describe an unusual complication in which the hip screw disengaged in the opposite direction, migrated through the hip joint, and came to rest inside the pelvic cavity. The separated components of the device were surgically removed without further complication.

Intertrochanteric Osteotomy for Femoral Neck Nonunion: Does "Undercorrection" Result in an Acceptable Rate of Femoral Neck Union?

OBJECTIVES: To analyze the radiographic outcomes of intertrochanteric osteotomy for the treatment of femoral neck nonunion with "undercorrection" of the Pauwels angle and relative preservation of the proximal femoral anatomy. DESIGN: Retrospective cohort study. SETTING: Level-1 trauma center. PATIENTS: Thirty-two patients with established femoral neck nonunions that had been treated with intertrochanteric osteotomy were retrospectively identified through Current Procedural Terminology codes. Seven patients were treated with 30 degree closing wedge osteotomy and 25 with a 20 degree or smaller osteotomy. INTERVENTION: Valgus-producing intertrochanteric osteotomy with a blade plate. MAIN OUTCOME MEASUREMENTS: Femoral neck and intertrochanteric osteotomy osseous union. RESULTS: Thirty-one of 32 patients (97%) went on to osseous union of the femoral neck and all intertrochanteric osteotomies healed. There was no significant difference in the rate of union of the femoral neck between those patients treated with 30 versus 20 degree or less osteotomies. After osteotomy, the mean Pauwels angle decreased from 71 degrees (range 52-95 degrees) to 47 degrees (range 23-67 degrees) and the mean proximal femoral offset decreased by 11 mm (range 0-23 mm). Seven patients developed radiographic signs of avascular necrosis after osteotomy (22%). Three patients of these patients were converted to total hip arthroplasty (9%). Patients treated with a 30 degree osteotomy were more likely to develop avascular necrosis (67% vs. 12%, P-value = 0.014). CONCLUSIONS: Valgus-producing intertrochanteric osteotomy with a smaller degree of correction than has been traditionally described leads to an excellent rate of radiographic union while preserving more of the native proximal femoral anatomy. LEVEL OF EVIDENCE: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Institutional and Seasonal Variations in the Incidence and Causative Organisms for Posttraumatic Infection following Open Fractures.

OBJECTIVES: The current literature focuses on wound severity, time to debridement, and antibiotic administration with respect to risk of infection after open fracture. The purpose of this analysis was to determine if either the incidence of posttraumatic infection or causative organism varies with treating institution or the season in which the open fracture occurred. DESIGN: Retrospective review. SETTING: Seven level 1 regional referral trauma centers located in each of the 7 climatic regions of the continental United States (Northwest, High Plains, Midwest/Ohio Valley, New England/Mid-Atlantic, Southeast, South, and Southwest). PATIENTS/PARTICIPANTS: Five thousand one hundred twenty-seven skeletally mature patients with open extremity fractures treated between 2008 and 2012 at one of the 7 institutions. INTERVENTION: Open reduction and internal fixation of fracture following institutional protocol for antibiotic prophylaxis, debridement, and soft-tissue management. MAIN OUTCOME MEASUREMENTS: Seasonal variation on the incidence of infection and the causative organism after treatment for open fracture as recorded by each individual treating institution. Charts were analyzed to extract information regarding date of injury, Gustilo-Anderson type of open fracture, subsequent treatment for a posttraumatic wound infection, and the causative organisms. Patients were placed into one of the 4 groups based on the time of year that the injury occurred: spring (March-May), summer (June-August), fall (September-November), and winter (December-February). Univariate/multivariate analyses and Fisher test were used to assess whether any observed differences were of statistical significance. RESULTS: The overall incidence of infection for all open fractures across the 7 different institutions was 7.6% and this did not vary significantly by season. There were, however, significant differences in overall infection rates between the different institutions: Southeast 4.3%, Northwest 13%, Northeast 7.7%, Southwest 9.3%, Midwest/Ohio Valley 5.5%, High Plains 14.6%, and South 7.4%. The following institutions demonstrated a significant seasonal variation in the incidence of infection: Northwest = fall 11% versus winter 18.5%, Southwest = winter 1.5% and fall 17.3%, Northeast = winter 5.2% and spring 9.7%, and Southeast = fall 2.8% and spring 6.0%. The High Plains, Midwest/Ohio Valley, and Southern institutions did not demonstrate a significant seasonal variation in infection rates. Finally, the most commonly encountered causative organism varied not only by region, but by season as well. Staphylococcus aureus (both methicillin sensitive and resistant) continues to be the most prevalent organism in the continental United States. CONCLUSIONS: A substantial seasonal and institutional variation exists regarding the incidence of infection and causative organisms for posttraumatic wound infection after open fractures. Although this may represent a difference in treatment regimens between individual surgeons and institutions, a decades-old general nation-wide empiric antibiotic prophylaxis regimen for all open fractures may in fact be outdated and suboptimal. We recommend that surgeons consult with their infectious disease colleagues to better understand the seasonal variation of infection and causative organism for their individual hospital, and adjust their prophylactic and treatment regimens accordingly. LEVEL OF EVIDENCE: Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Incarcerated Cortical Fragments in Intramedullary Nailing.

In fractures with varying degrees of comminution, it is possible for cortical bone fragments to become entrapped within the intramedullary canal. There have been prior case reports on complications associated with incarcerated fragments; however, there has been no proposed solution. The current case shows how 2 cortical fragments in the distal segment of a comminuted femur fracture impeded passage of the intramedullary reamer and induced deformity at the fracture site during the reaming. The authors describe a simple method of retrieval without having to formally open the fracture site. Recognizing the presence of an incarcerated fragment and appropriately managing it intraoperatively allows for fracture fixation to occur uneventfully. [Orthopedics. 2016; 39(3):e582-e586.].

Hyperextension Varus Bicondylar Tibial Plateau Fracture Pattern: Diagnosis and Treatment Strategies.

OBJECTIVES: The authors have identified a subset of bicondylar tibial plateau fractures with a hyperextension varus deformity (HEVBTP). The radiographic hallmarks of this pattern are (1) sagittal plane malalignment with loss of the normal posterior slope of the tibial plateau, (2) tension failure of the posterior cortex, (3) compression of the anterior cortex, and (4) varus deformity in the coronal plan. The purpose of this study was to describe this fracture pattern, to compare the associated injuries with non-HEVBTP fractures, and to suggest treatment strategies that may allow for improved reduction and stabilization. DESIGN: Retrospective Cohort Study. SETTING: Level 1 trauma center. PATIENTS: Preoperative radiographs and CT scans were reviewed in 208 patients who sustained 212 bicondylar tibial plateau fractures (OTA 41C). Twenty-five fractures in 23 patients fulfilled the radiographic criteria for HEVBTP fracture pattern. The remaining 187 bicondylar tibial plateau fractures were used as a control group. INTERVENTION: Initial spanning external fixation, followed by open reduction internal fixation and bone grafting with/without augmentation. MAIN OUTCOME MEASUREMENT: Associated injury rate compared with OTA 41C patients without HEVBTP pattern, nonunion rates, and loss of reduction rates. RESULTS: Thirty-two percent of the HEVBTP fractures demonstrated significant associated injuries compared with 16% in the control group. The incidence of popliteal artery disruption requiring repair was 12% in the HEVBTP group compared with 1% in the control group. Patients with HEVBTP had either partial or complete peroneal nerve injury in 16% of cases (8% in control group) and 12% of patients developed a leg compartment syndrome (10% in control group). CONCLUSIONS: The HEVBTP pattern is a unique fracture. The surgeon must recognize the possible associated injuries that accompany this injury. We suggest fixation strategies that address this injury's individual components which may help to avoid failure. LEVEL OF EVIDENCE: Prognostic Level II. See Instructions for Authors for a complete description of levels of evidence.

Coronal Plane Small-Fragment Fixation in Supracondylar Intercondylar Femur Fractures.

Supracondylar intercondylar distal femur fractures are devastating injuries that frequently have a concurrent coronal plane fracture, which mandates dedicated operative fixation. The purpose of this study was to determine whether small-fragment cortical lag screws oriented in the sagittal plane were sufficient to stabilize coronal plane fractures associated with supracondylar intercondylar distal femur fractures. The authors evaluated short-term radiographic outcomes in 56 coronal plane fractures in 44 knees (27 [61.4%] male, 17 [38.6%] female; mean age, 43 years [range, 19-97 years]) sustaining a supracondylar intercondylar distal femur fracture between January 2001 and November 2013. Coronal plane fractures were stabilized with sagittally oriented small-fragment cortical lag screws measuring 3.5 mm or smaller, and the supracondylar intercondylar component was stabilized with a lateral periarticular plate. Fracture displacement was defined as greater than 2 mm of gapping/translation of the coronal plane fragment on any radiographic view. Thirty-three (75.0%) knees had open injuries. Fifty-five (98.2%) of 56 coronal plane fractures went on to radiographic union with no displacement of the coronal fragment; one knee developed avascular necrosis and required arthrodesis. Fifteen (34.1%) of 44 knees required secondary procedures unrelated to the coronal plane fracture. The reduction of coronal plane fractures associated with supracondylar intercondylar distal femur fractures can be reliably maintained when stabilized with small-fragment cortical lag screws oriented in the sagittal plane.

Open surgical management of high energy ipsilateral fractures of the fibula and calcaneus.

BACKGROUND: Simultaneous ipsilateral fractures of the calcaneus and fibula are the result of high-energy injuries. Open surgical treatment of both fractures can be performed with incisions based on the described blood supply of the lower extremity. METHODS: A retrospective review for all patients with ipsilateral fractures of the calcaneus and fibula was performed over an eight-year period. Thirty-eight patients were identified. Eleven patients (28.9%) were treated with open reduction and internal fixation through two separate incisions. Average follow-up was 48.8 weeks. RESULTS: Two patients (18.1%) required a secondary procedure. Three patients (27.2%) developed incisional cellulitis that resolved with oral antibiotics and one patient required local wound care. All fractures united. CONCLUSIONS: Ipsilateral fractures of the calcaneus and fibula require open reduction and internal fixation when closed or percutaneous treatment is not appropriate. We describe an operative approach based on the angiosomes of the lower extremity that allows for treatment of these complex injuries and report the associated complications.

How much articular displacement can be detected using fluoroscopy for tibial plateau fractures?

INTRODUCTION: While there is conflicting evidence regarding the importance of anatomic reduction for tibial plateau fractures, there are currently no studies that analyse our ability to grade reduction based on fluoroscopic imaging. The purpose of this study was to determine the accuracy of fluoroscopy in judging tibial plateau articular reduction. METHODS: Ten embalmed human cadavers were selected. The lateral plateau was sagitally sectioned, and the joint was reduced under direct visualization. Lateral, anterior-posterior (AP), and joint line fluoroscopic views were obtained. The same fluoroscopic views were obtained with 2mm displacement and 5mm displacement. The images were randomised, and eight orthopaedic traumatologists were asked whether the plateau was reduced. Within each pair of conditions (view and displacement from 0mm to 5mm) sensitivity, specificity, and intraclass correlations (ICC) were evaluated. RESULTS: The AP-lateral view with 5mm displacement yielded the highest accuracy for detecting reduction at 90% (95% CI: 83-94%). For the other conditions, accuracy ranged from (37-83%). Sensitivity was highest for the reduced lateral view (79%, 95% CI: 57-91%). Specificity was highest in the AP-lateral view 98% (95% CI: 93-99%) for 5mm step-off. ICC was perfect for the AP-lateral view with 5mm displacement, but otherwise agreement ranged from poor to moderate at ICC=0.09-0.46. Finally, there was no additional benefit to including the joint-line view with the AP and lateral views. CONCLUSION: Using both AP and lateral views for 5mm displacement had the highest accuracy, specificity, and ICC. Outside of this scenario, agreement was poor to moderate and accuracy was low. Applying this clinically, direct visualization of the articular surface may be necessary to ensure malreduction less than 5mm.

Indomethacin prophylaxis for heterotopic ossification after acetabular fracture surgery increases the risk for nonunion of the posterior wall.

OBJECTIVES: To determine if indomethacin has a positive clinical effect for the prophylaxis of heterotopic ossification (HO) after acetabular fracture surgery. To determine whether indomethacin affects the union rate of acetabular fractures. DESIGN: Prospective randomized double-blinded trial. SETTING: Level 1 regional trauma center. PATIENTS: Skeletally mature patients treated operatively for an acute acetabular fracture through a Kocher-Langenbeck approach. INTERVENTION: Patients were randomly allocated to 1 of 4 groups comparing placebo (group 1) to 3 days (group 2), 1 week (group 3), and 6 weeks (group 4) of indomethacin treatment. MAIN OUTCOME MEASUREMENTS: Factors analyzed included the overall incidence, Brooker class and volume of HO, radiographic union of the acetabular fracture, and pain. Patients were followed clinically and radiographically at 6 weeks, 3 months, 6 months, and 1 year. Serum levels of indomethacin were drawn at 1 month to assess compliance. Computed tomographic scans were performed at 6 months to assess healing and volume of HO. RESULTS: Ninety-eight patients were enrolled into this study, 68 completed the follow-up and had the 6-month computed tomographic scan, and there was a 63% compliance rate with the treatment regimen. Overall incidence of HO was 67% for group 1, 29% for group 2 (P = 0.04), 29% for group 3 (P = 0.019), and 67% for group 4. The volume of HO formation was 17,900 mm for group 1, 33,800 mm for group 2, 6300 mm for group 3 (P = 0.005), and 11,100 mm for group 4. The incidence of radiographic nonunion was 19% for group 1, 35% for group 2, 24% for group 3, and 62% for group 4 (P = 0.012). Seventy-seven percent of the nonunions involved the posterior wall segment. Pain visual analog scores (VASs) were significantly higher for patients with radiographic nonunion (VAS 4 vs. VAS 1, P = 0.002). CONCLUSIONS: Treatment with 6 weeks of indomethacin does not appear to have a therapeutic effect for decreasing HO formation after acetabular fracture surgery and appears to increase the incidence of nonunion. Treatment with 1 week of indomethacin may be beneficial for decreasing the volume of HO formation without increasing the incidence of nonunion. LEVEL OF EVIDENCE: Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.