The extended posterolateral approach for split depression lateral tibial plateau fractures extending into the posterior column: 2 years follow up results of a prospective study

ObjectiveTo prospectively study the outcome of surgically treated split depression lateral tibial plateau fractures extending into the posterior column using the extended posterolateral approach.MethodsTwenty-one patients with split depression lateral tibial plateau fractures (AO: 41-B3) with extension into the posterior column were treated with open reduction and internal fixation through an extended posterolateral approach with osteotomy of the fibular neck ± Gerdy tubercle. Follow up radiographs was assessed for quality of articular reduction and limb axis. Functional assessment was performed at last follow up using the Tegner–Lysholm score. Complications pertaining to the surgical approach were recorded.ResultsThe approach was performed in 15 patients with a fibular neck osteotomy alone and 6 patients required a Gerdy's tubercle osteotomy also. All fractures and osteotomies had united. Anatomical articular reduction was achieved in 16 patients. Radiological limb alignment was restored in all patients except for a reversed posterior slope in 1 patient. Arthritic changes were seen in 3 patients. The mean Tegner–Lysholm score was 87.3 (range: 76–95) at last follow up. No specific complications related to the surgical approach like common peroneal nerve injury and lateral instability of the knee was encountered.ConclusionThe extended posterolateral approach offers excellent exposure posterior to the fibular head to perform articular reduction and fixation achieving satisfactory radiological and functional results in split depression lateral tibial plateau fractures extending into the posterior column.     

Correlation of parameters on preoperative CT images with intra-articular soft-tissue injuries in acute tibial plateau fractures: A review of 132 patients receiving ARIF

IntroductionTibial plateau fractures often occur in conjunction with soft-tissue injuries of knees. The hypothesis of this study is that parameters of CT imaging can predict intra-articular soft-tissue injuries.Patients and methodsPatients who underwent arthroscopically assisted reduction and internal fixation (ARIF) for acute tibial plateau fractures performed by a single orthopedic surgeon between 2005 and 2015 were included in this retrospective study. Patients with concomitant ipsilateral femoral fractures, who had received revision surgery or who had undergone index surgery more than 30 days from the event were excluded. We measured lateral plateau depression and widening, medial plateau depression and displacement, and column involvement observed on preoperative CT scans. Intra-articular soft-tissue injuries were diagnosed based on findings from knee arthroscopy. The correlation of imaging parameters with soft-tissue injuries was analyzed by the area under a receiver operating characteristic (AUROC) curve and multivariate logistic regression.ResultsOne-hundred and thirty-two patients were enrolled in the study. The average age was 45.7 ± 13.1 years (range: 18–75 years). Lateral tibial plateau depressions >11 mm were significantly associated with increased risk of lateral meniscus tears (p = 0.001). However, there was no significant threshold of lateral tibial plateau widening that could be used to predict lateral meniscus tear. Greater risk of anterior cruciate ligament (ACL) avulsion fracture was observed in younger patients, patients with high-energy-pattern tibial plateau fractures, patients with fractures involving anteromedial or posterolateral columns, and patients with medial tibial plateau displacement >3 mm (p < 0.05).ConclusionMeasuring lateral tibial plateau depression and column involvement on preoperative CT scans can help predict a higher risk of lateral meniscus tear and ACL avulsion fracture respectively in patients with acute tibial plateau fractures.     

The anterolateral supra-fibular-head approach for plating posterolateral tibial plateau fractures: A novel surgical technique

ObjectiveThe posterolateral (PL) tibial plateau quadrant is laterally covered by the fibular head and posteriorly covered by a mass of muscle ligament and important neurovascular structures. There are several limitations in exposing and fixing the PL tibial plateau fractures using a posterior approach. The aim of this study is to present a novel anterolateral supra-fibular-head approach for plating PL tibial plateau fractures.MethodsFive fresh and ten preserved knee specimens were dissected to measure the following parameters:1) the vertical distance from the apex of the fibular head to the lateral plateau surface, 2) the transverse distance between the PL platform and fibula collateral ligament (FCL), and 3) the tension of the FCL in different knee flexion positions. Clinically, isolated PL quadrant tibial plateau fractures were treated via an anterolateral supra-fibular-head approach and lateral rafting plate fixation. The outcome of the patients was assessed after a short to medium follow-up period.ResultsThe distance from the apex of the fibular head to the lateral condylar surface was 12.2 ± 1.6 mm on average. With the knee extended and the FCL tensioned, the transverse distance between the PL platform and the FCL was 6.7 ± 1.1 mm. With the knee flexed to 60° and the FCL was in the most relaxed position, the distance increased to 21.1 ± 3.0 mm. Clinically, a series of 7 cases of PL tibial plateau fractures were treated via this anterolateral supra-fibular-head approach. The patient was placed in a lateral decubitus position with the knee flexed to approximately 60 degrees. After the posterior retraction of the FCL, the plate was placed more posteriorly to provide a raft or horizontal belt fixation of the PL tibial plateau fragment. After an average of 14.3 months of follow up, the knee range of motion(ROM) was 121.4°±8.8° (range: 105°-135°), the HSS score was 96.7 ± 2.6 (range: 90-100), and the SMFA dysfunction score was 22.4 ± 3.8 (range: 16-28) points.ConclusionThe anterolateral supra-fibular-head approach can provide direct visualization of the posterolateral tibial plateau quadrant and put the plate more posteriorly to provide a raft for the fragments such that good clinical outcomes can be anticipated.     

Predictors of osteoarthritis following operative treatment of medial tibial plateau fractures

PurposeTo determine factors influencing the development of posttraumatic osteoarthritis (OA) following medial tibial plateau fractures and to evaluate concomitant injuries associated with these fractures.Materials and methodsA chart review of patients with operatively treated medial tibial plateau fractures admitted to our Level I trauma centre from 2002 to 2008 was performed. Of 63 patients, 41 participated in a clinical and radiographic examination. The mean age was 47 years (range 16–78) and the mean follow-up time was 7.6 (range 4.7–11.7) years. All patients had preoperative computed tomography (CT) scans and postoperative radiographs. At the end of follow-up, standing radiographs, mechanical axis, and CT scans were evaluated.ResultsOf the 41 patients, 24 had no or mild (Kellgren-Lawrence grade 0–2) OA and 17 had severe (grade 3–4) OA. Initial articular depression measured from preoperative CT scans was a significant predictor of OA (median 1.8 mm vs 4.5 mm, p = 0.009). Fracture line extension to the lateral plateau (p = 0.68) or fracture comminution (p = 0.21) had no effect on the development of posttraumatic OA, nor did articular depression at the end of follow-up (p = 0.68) measured from CT scans. Mechanical axis >4° of varus and ≥2 mm articular depression or step-off were associated with worse WOMAC pain scores, but did not affect other functional outcome scores. Six patients (10%) had permanent peroneal nerve dysfunction. Ten patients (16%) required LCL reconstruction and nine (14%) ACL avulsions were treated at the time of fracture stabilisation.ConclusionsThe amount of articular depression measured from preoperative CT scans seems to predict the development of posttraumatic OA, probably reflecting the severity of chondral injury at the time of fracture. Restoration of mechanical axis and articular congruence are important in achieving a good clinical outcome.     

Intra-articular tibial plateau fracture characteristics according to the “Ten segment classification”

BackgroundCurrently existing classifications of tibial plateau fractures do not help to guide surgical strategy. Recently, a segment-based mapping of the tibial plateau has been introduced in order to address fractures with a fracture-specific surgical approach. The goal of the present study was to analyze incidence and fracture specifics according to a new 10-segment classification of the tibial plateau.MethodsA total of 242 patients with 246 affected knees were included (124 females, 118 males, mean age 51.9 ± 16.1 years). Fractures were classified according to the OTA/AO classification. Fracture pattern was analyzed with respect to a 10-segment classification based on CT imaging of the proximal tibial plateau 3 cm below the articular surface.Results161 Patients suffered an OTA/AO type 41-B and 85 patients an OTA/AO type 41-C tibial plateau fracture. Females had an almost seven times higher risk to suffer a fracture due to low-energy trauma (OR 6.91, 95% CI (3.52, 13.54), p < 0.001) than males. In 34% of the patients with affection of the medial tibial plateau, a fracture comminution, primarily due to low-energy trauma (p < 0.001), was observed. In type B fractures, the postero-latero-lateral (65.2%), the antero-latero-lateral (64.6%) and the antero-latero-central (60.9%) segment were most frequently affected. Every second type C fracture showed an unique fracture line and zone of comminution. The tibial spine was typically involved (89.4%). A typical fracture pattern of high-energy trauma demonstrated a zone of comminution of the lateral plateau and a split fracture in the medial plateau. The most frequently affected segments were the postero-latero-central (85.9%), postero-central (84.7%), and antero-latero-central (78.8%) segment.ConclusionPosterior segments were the most frequently affected in OTA/AO type B and C fractures. Acknowledging the restricted visibility of posterior segments, whose reduction and fixation is crucial for long-term success, our findings implicate the use of posterior approaches more often in the treatment of tibial plateau fractures. Also, low-energy trauma was identified as an important cause for tibial plateau fractures.     

Moore I postero-medial articular tibial fracture in alpine skiers: Surgical management and return to sports activity

PurposeOver the past 10 years, like many authors, we observed an increasing number of Moore I tibial plateau fractures related to alpine skiing for which the surgeon may face difficult choices regarding surgical approach and fixation means. Some authors have recently been suggesting a posterior approach associated to open reduction and osteosynthesis by a buttress plate. But in our knowledge there is no specific study on sports activity recovery after Moore I tibial fractures. The aim of this work was to assess sports activities and clinical outcomes after surgically treated Moore I tibial plateau fractures in an athletic population of skiers.MethodsWe conducted a prospective case series between 2012 and 2014. This included fifteen patients aged 39.6 ± 7 years whom presented with a Moore I tibial plateau fracture during a skiing accident. 12 cases (80%) presented with an associated tibial spine fracture. Treatment consisted of a standard antero-medial approach, with a medial para patellar arthrotomy to allow direct visualisation of articular reduction and spinal fixation. Two or three 6.5 mm long cancellous bone screws were placed antero-posteriorly so as to ensure perfect compression of the fracture site. Radiological and functional results were assessed by an independent observer (Lysholm-Tegner, UCLA, KOOS scores) at the longest follow-up.ResultsMean follow-up was 18.2 ± 6 months (12–28). An immediate postoperative anatomical reduction was achieved in all cases and remained stable in time. At last follow-up Lysholm mean score was 85 ± 14 points (59–100), UCLA score was 7.3 ± 1.6 (4–10) and Tegner score was 4.6 ± 1.3 (3–6). Mean KOOS score was 77 ± 15 (54–97). 87% of patients had resumed their skiing activity and 93% were satisfied or very satisfied from their post-operative surgical outcome. We observed no pseudarthrosis or secondary varus displacement.ConclusionIn our series 87% of patients had resumed back to their sporting activities. Surgical management of Moore I tibial plateau fractures by isolated antero-posterior screwing provides excellent clinical and radiological results. The anteromedial incision has a dual advantage of anatomical reduction, tibial spine fixation (in 80% of our cases) and posteromedial fragment reduction.     

Complications and unplanned outcomes following operative treatment of tibial plateau fractures

IntroductionThe operative management of tibial plateau fractures is challenging and post-operative complications do occur. The purpose of this study was three-fold. 1). To report complications and unplanned outcomes in patients who had sustained tibial plateau fractures and were operatively managed 2). To report predictors of these post-operative events 3). To report if differences in clinical outcomes exist in patients who sustained a post-operative event.MethodsOver 11 years, all tibial plateau fractures were prospectively followed. Clinical outcomes were assessed using the validated Short Musculoskeletal Functional Assessment (SMFA) score. Demographics, initial injury characteristics, surgical details and post-operative events were prospectively recorded. Student’s t-tests were used for continuous variables and chi-squared analysis was used for categorical variables. Binary logistic regression and multivariate linear regression were conducted for independent predictors of post-operative events and complications and functional outcomes, respectively.Results275 patients with 279 tibial plateau fractures were included in our analysis. Ten patients (3.6%) sustained a deep infection. Six patients (2.2%) developed a superficial infection. One patient (0.4%) presented with early implant failure. Two patients (0.7%) developed a fracture nonunion. Eight patients (2.9%) developed a venous thromboembolism. Seventeen patients (6.2%) went on to re-operation for symptomatic implant removal. Nine patients (3.3%) underwent a lysis of adhesions procedure. Univariate analysis demonstrated bicondylar tibial plateau fractures (P < 0.001), Moore fracture-dislocations (P = 0.005), open fractures (P = 0.022), and compartment syndrome (P = 0.001) to be associated with post-operative complications and unplanned outcomes. Long-term functional outcomes were worse among patients who developed a post-operative complication or unplanned outcome (P = 0.031).ConclusionOrthopaedic trauma surgeons should be aware of complications and unplanned outcomes following operatively managed tibial plateau fractures, along with having the knowledge of factors that are associated with development of post-operative events.     

Surgical site infection in tibial plateau fractures with ipsilateral compartment syndrome

AimThe aim of this study was to investigate the effects of compartment syndrome and timing of fasciotomy wound closure on surgical site infection (SSI) after surgical fixation of tibial plateau fractures. Our primary hypothesis was that SSI rate is increased for fractures with compartment syndrome versus those without, even accounting for confounders associated with infection. Our secondary hypothesis was that infection rates are unrelated to timing of fasciotomy closure or fixation.Materials and methodsWe conducted a retrospective cohort study of operative tibial plateau fractures with ipsilateral compartment syndrome (n = 71) treated with fasciotomy at our level I trauma center from 2003 through 2011. A control group consisted of 602 patients with 625 operatively treated tibial plateau fractures without diagnosis of compartment syndrome. The primary outcome measure was deep SSI after ORIF.ResultsFractures with compartment syndrome had a higher rate of SSI (25% versus 8%, p < 0.001). The difference remained significant in our multivariate model (odds ratio, 7.27; 95% confidence interval, 3.8–13.9). Delay in timing of fasciotomy closure was associated with a 7% increase per day in odds of infection (95% confidence interval, 0.2–13; p < 0.05).ConclusionsTibial plateau fractures with ipsilateral compartment syndrome have a significant increase in rates of SSI compared with those without compartment syndrome (p < 0.001). Delays in fasciotomy wound closure were also associated with increased odds of SSI (p < 0.05).     

Long-term radiographic appearance of calcium-phosphate synthetic bone grafts after surgical treatment of tibial plateau fractures

ObjectivesSynthetic bone grafts (SBGs) are widely used to fill bone defects after fracture reduction. This study assessed the long-term resorption of two different calcium phosphate products (A = ChronOS™ inject and B = Norian^® SRS^®; both DePuy Synthes, Oberdorf, Switzerland) used in the surgical treatment of tibial plateau fractures.DesignLong-term clinical and radiologic follow-up of 52 patients after surgical treatment of intraarticular tibial plateau fractures augmented with SBGs.SettingThe study was performed at a level 3 trauma center.PatientsBetween January 2000 and December 2006 a total of 52 patients with intraarticular tibial plateau fractures were operatively treated and augmented with SBGs consisting of a Brushite matix with β-TCP granules (SBG A) or hydroxylapatite with 4–6% carbonate content (SBG B). 46 patients could be contacted and 38 were included in the study. Half of the patients received SBG A and the other half SBG B.Main outcome measurementsLoss of reduction and SBG resorption was investigated by comparison of follow-up X-ray images to pre- and postoperative X-ray images. Furthermore, pain, activity level and knee function were evaluated by means of questionnaires and clinical examination.ResultsThe mean age of patients was 59.7 ± 12.5 years. The follow-up was 8.6 ± 0.9 years for SBG A and 11.6 ± 1.4 years for SBG B (p < 0.001). In most cases SBG A was completely resorbed in a homogenous pattern, while SBG B was still visible on the X-ray images revealing a peripheral resorption pattern. A loss of reduction (>2 mm) could be observed in two patients with SBG A and two patients with SBG B, although only one of them had an impaired knee function.ConclusionsThe composite SBG A reveals a comprehensive long-term resorption in comparison to SBG B. Nevertheless, both provided suitable mechanical support as part of the surgical treatment of tibial plateau fractures.Level of evidenceCase series, Level IV.     

A combined approach for the treatment of lateral and posterolateral tibial plateau fractures

IntroductionThe treatment of tibial plateau fractures involving the lateral and posterolateral column is a demanding and fine surgical challenge. The purpose of this study was to evaluate the safety and clinical efficacy of combined approach for the treatment of lateral and posterolateral tibial plateau fractures.MethodsA prospective study was performed in 17 patients with lateral and posterolateral tibial plateau fractures between January 2009 and December 2012. There were 12 males and 5 females with a mean age of 40 years. All of them received dual-plate fixation through the combined approach, with the patients in a floating position. The combined approaches included a conventional anterolateral approach and an inverted L-shaped posterolateral approach. Operation time, intraoperative blood loss, fracture healing time, Hospital for Special Surgery (HSS) knee score, knee flexion and extension range of motion, and complications were recorded to evaluate treatment effects.ResultsThere were no intraoperative complications related to this technology. Mean operation time was 144 min with a mean intraoperative blood loss volume of 233 mL. The mean follow-up was 23 months. All 17 patients had good postoperative fracture healing. Mean union time was 12 weeks. At the final follow-up, the average HSS score was 92.5, with the average knee flexion of 125° and an average knee extension of 2°. Two patients had complications in postoperative incisions with aseptic fat liquefaction. After thorough debridement, second-stage wounds healing were achieved. No neurovascular injury occurred. No collapse of reduced articular surface was detected.ConclusionsThe combined approach with dual-plate offers direct and complete surgical exposure and provide an effective method for the treatment of lateral and posterolateral tibial plateau fractures.     

Metaphyseal locking plate as an external fixator for open tibial fracture: Clinical outcomes and biomechanical assessment

ObjectiveThis study aimed to evaluate the outcome of using a metaphyseal locking plate as a definitive external fixator for treating open tibial fractures based on biomechanical experiments and analysis of clinical results.MethodsA metaphyseal locking plate was used as an external fixator in 54 open tibial fractures in 52 patients. The mean follow-up was 38 months (range, 20–52 months). Moreover, static axial compression and torsional tests were performed to evaluate the strength of the fixation techniques.ResultsThe average fracture healing time was 34.5 weeks (range, 12–78 weeks). At 4 weeks postoperatively and at the final follow-up, the average Hospital for Special Surgery knee score was 85 (range, 81–100) and 94 (range, 88–100), respectively, and the American Orthopaedic Foot and Ankle Society score was 88 (range, 80–100) and 96 (range, 90–100), respectively. Based on the static test result, the axial stiffness was significantly different among groups (p = 0.002), whereas the torsional stiffness showed no significant difference (p = 0.068).ConclusionsClinical outcomes show that the use of locking plate as a definitive external fixator is an alternative choice for tibial fractures after obtaining appropriate fracture reduction. However, external locked plating constructs were not as strong as standard locked plating constructs. Therefore, the use of external locked plating constructs as a definitive treatment warrants further biomechanical study for construct strength improvement.     

Characteristics of postoperative weight bearing and management protocols for tibial plateau fractures: Findings from a scoping review

ObjectiveTo identify and describe the characteristics of existing practices for postoperative weight bearing and management of tibial plateau fractures (TPFs), identify gaps in the literature, and inform the design of future research.MethodsSeven electronic databases and clinical trial registers were searched from inception until November 17th 2016. Studies were included if they reported on the surgical management of TPFs, had a mean follow-up time of ≥1 year and provided data on postoperative management protocols. Data were extracted and synthesized according to study demographics, patient characteristics and postoperative management (weight bearing regimes, immobilisation devices, exercises and complications).Results124 studies were included involving 5156 patients with TPFs. The mean age across studies was 45.1 years (range 20.8–72; 60% male), with a mean follow-up of 34.9 months (range 12–264). The most frequent fracture types were AO/OTA classification 41-B3 (29.5%) and C3 (25%). The most commonly reported non-weight bearing time after surgery was 4–6 weeks (39% of studies), with a further 4–6 weeks of partial weight bearing (51% of studies), resulting in 9–12 weeks before full weight bearing status was recommended (55% of studies). Loading recommendations for initial weight bearing were most commonly toe-touch/<10 kg (28%), 10 kg–20 kg (33%) and progressive (39%). Time to full weight bearing was positively correlated with the proportion of fractures of AO/OTA type C (r = 0.465, p = 0.029) and Schatzker type IV–VI (r = 0.614, p < 0.001). Similar rates of rigid (47%) and hinged braces were reported (58%), most frequently for 3–6 weeks (43% of studies). Complication rates averaged 2% of patients (range 0–26%) for abnormal varus/valgus and 1% (range 0–22%) for non-union or delayed union.ConclusionsPostoperative rehabilitation for TPFs most commonly involves significant non-weight bearing time before full weight bearing is recommended at 9–12 weeks. Partial weight bearing protocols and brace use were varied. Type of rehabilitation may be an important factor influencing recovery, with future high quality prospective studies required to determine the impact of different protocols on clinical and radiological outcomes.     

The pivotal role of the coronal fracture line for a new three-dimensional CT-based fracture classification of bicondylar proximal tibial fractures

IntroductionClassical fracture classifications (AO/OTA, Schatzker) are commonly used to characterize bicondylar proximal tibial fractures. However, none of these classifications allows for a treatment algorithm. The aim of our study was to use 3D appearance of these fractures in CT imaging to improve the clinical value of the classification.Materials and methods3D appearance of 81 CT scans of bicondylar proximal tibial fractures were systematically analyzed and were classified in 3 subtypes, based on the fracture lines orientation. The novel classification was compared for reliability and for clinical relevance with AO and Schatzker classification.ResultsA total of 159 fracture lines were identified which were most frequently oriented in sagittal (89/159), and in coronal (41/159) direction. Based on the orientation of the major fracture lines three fracture types were defined. A special emphasis was drawn to the coronal fracture line of the medial plateau leading to a surgical treatment algorithm. Interobserver reliability was analyzed for all 81 patients resulting in an excellent reliability of К = 0.936 for the 3D classification scheme compared to К = 0.720 for the AO/OTA, К = 0.785 for the Schatzker classification. Correlations with clinical parameters were only observed for the 3D classification.DiscussionThe presented classification scheme based on the 3D geometry of bicondylar proximal tibial fractures demonstrates a good reliability of clinical relevance.     

Comparison of different locking plate fixation methods in lateral malleolus fractures

BackgroundSeveral fixation methods may be used for displaced lateral malleolar fractures. We aimed to compare clinical and radiologic outcomes associated with use of locking one third tubular plate vs. anatomical distal fibula locking plate in lateral malleolar fractures.MethodsA total of 62 orthopedic patients operated for lateral malleolus fracture were included in this retrospective study. Patients were divided into two groups regarding the plate used for fixation as locking one third tubular plate (group I; n = 37) and locking anatomical distal fibula plate (group II; n = 25). Data on Danis–Weber ankle fracture classification (Type A, Type B), duration of follow up, clinical outcome [ankle range of motion (ROM), American Orthopaedic Foot & Ankle Society (AOFAS) score], radiological outcomes (adequacy of reduction, loss of alignment), time to fracture healing and complications were recorded in study groups.ResultsNo significant difference was noted between groups in terms of AOFAS score [87.0 (73–100) vs. 85.0 (71–100), respectively (p = 0.339)] and no patients had severe restriction in sagittal and hindfoot motion in both groups. The two groups showed similar healing time [9.0 (7–13) weeks vs. 10.0 (8–13) weeks, respectively (p = 0.355)] and complication rate [0.0% vs. 4.0%, respectively (p = 0.403)].ConclusionsThis study revealed no significant difference between use of locking one third tubular plate and locking anatomical distal fibula plate in lateral malleolar fixation, in terms of clinical and radiological outcomes, complication rates and fracture healing time.     

Interobserver reliability of the Schatzker and Luo classification systems for tibial plateau fractures

IntroductionTibial plateau fracture classification systems have limited interobserver reliability and new systems emerge. The purpose of this study was to compare the reliability of the Luo classification and the Schatzker classification for two-dimensional computed tomography (2DCT) and to study the effect of adding three-dimensional computed tomography (3DCT).Materials and MethodsEighty-one observers, orthopedic surgeons and residents, were randomized to either 2DCT or 2D- and 3DCT evaluation of a spectrum of 15 complex tibial plateau fractures using web-based platforms in order to classify according to the Schatzker and according to Luo's Three Column classification. Reliability was calculated with the use of Siegel and Castellan's multirater kappa measure. Kappa values were interpreted according to the categorical rating by Landis and Koch.ResultsOverall interobserver reliability of the Schatzker classification was significantly better compared to the Luo classification (k_Schatzker = 0.32 and k_Luo = 0.28, P = 0.021), however, ‘fair’ for both fracture classification systems. For the Schatzker classification observers agreed significantly better on 2DCT compared to 2D- and 3DCT (k_2DCT = 0.37 and k_2D+3DCT = 0.29, P < 0.001). The addition of 3DCT did not improve the overall interobserver reliability for the Luo classification as well, as kappa values were not significantly different on 2DCT and 2D- and 3DCT (k_2DCT = 0.31 and k_2D+3DCT = 0.25, P = 0.096).ConclusionsThe agreement between observers was significantly better for the Schatzker classification compared to Luo's Three Column classification, however agreement was fair for both classification systems. Furthermore, the addition of 3DCT reconstructions did not improve the reliability of CT-based evaluation of tibial plateau fractures. Considering that new classification systems and 3DCT do not seem to improve agreement between surgeons, other efforts are needed that lead to more reliable diagnosis of complex tibial plateau fractures.     

Asymmetry in gait pattern following bicondylar tibial plateau fractures—A prospective one-year cohort study

IntroductionDespite the high number of studies evaluating outcomes following tibial plateau fractures, the literature lacks studies including the objective assessment of gait pattern. The purpose of the present study was to evaluate asymmetry in gait patterns at 12 months after frame removal following ring fixation of a tibial plateau fracture.Patients and methodsThe study design was a prospective cohort study. The primary outcome measurement was the gait patterns 12 months after frame removal measured with a pressure-sensitive mat. The mat registers footprints and present gait speed, cadence, as well as temporal and spatial parameters of the gait cycle. Gait patterns were compared to a healthy reference population.ResultsTwenty-three patients were included with a mean age of 54.4 years (32–78 years). Patients presented with a shorter step-length of the injured leg compared to the non-injured leg (asymmetry of 11.3%). Analysis of single-support showed shorter support time of the injured leg compared to the non-injured leg (asymmetry of 8.7%). Moreover, analysis of swing-time showed increased swing-time of the injured leg (asymmetry of 8.9%). Compared to a healthy reference population, increased asymmetry in all gait patterns was observed. The association between asymmetry and health-related quality of life (HRQOL) showed moderate associations (single-support: R = 0.50, P = 0.03; step-length: R = 0.43, P = 0.07; swing-time: R = 0.46, P = 0.05).ConclusionCompared to a healthy reference population, gait asymmetry is common 12 months after frame removal in patients treated with external ring fixation following a tibial plateau fracture of the tibia.     

A biomechanical study of proximal tibia bone grafting through the lateral approach

BackgroundAutologous bone graft remains the gold standard source of bone graft. Iliac crest has traditionally been the most popular source for autologous bone graft. However, iliac crest bone graft harvesting is associated with high donor site morbidity. Bone graft harvesting from the proximal tibia has shown great potential with reported low complication rates. However, there is a paucity of biomechanical studies concerning the safety as well as yield of proximal bone graft harvesting.PurposeThis biomechanical study was designed to investigate (1) the stability of the harvested proximal tibial during physiological loading, and (2) the maximum size of the cortical window that can be safely created and (3) volume of accessible bone graft.MethodsBone grafts were harvested from eleven cadaveric tibiae using a circular cortical window along the lateral proximal tibia. These harvested proximal tibiae were then loaded under physiological conditions (mean 2320N, range 1650–3120N) using a customized test fixture. Strain rosettes were mounted at 7 locations in the harvested proximal tibia to record the changes in strain at the harvested proximal tibia. The change in strain with increasing cortical window size (10–25 mm diameter) was also studied. Bone principal strains as well as volume of bone harvested were recorded.ResultsA repeated measures ANOVA was used to analyze the change in bone strains with the cortical window size. Statistically significant (p < 0.05) increases in bone strains at the anterior and medial aspects of the tibia were observed with increasing size of osteotomies (−328.85 με, SD = 232.21 to −964.78 με, SD = 535.89 and 361.64 με, SD = 229.90 to −486.08 με, SD = 270.40 respectively), and marginally significant changes in strain at the lateral and posterior aspects. None of the tibiae failed under normal walking loads even with increasing osteotomies size of 10–25  mm diameter. A smaller osteotomy of 10 mm diameter yielded an average volume of 7.15 ml of compressed bone graft, while a larger osteotomy of 25 mm diameter yielded on average an additional 3.64 ml of bone graft. Bone grafting of the proximal tibia through the lateral approach with a circular osteotomy is a feasible option even with osteotomies of 25 mm diameter. Even though increased bone strains were observed, the strains did not exceed the yield strain of cortical bone when loaded under normal walking conditions. The quantity of bone harvested from the proximal tibia is comparable to that harvested from the iliac crest.ConclusionsThis biomechanical study demonstrated the stability of the harvested proximal tibia under conditions of full weight bearing ambulation. It has also refined the technique of proximal bone graft harvesting by determining the maximum size of the cortical window. The findings of this study add to the overall understanding of proximal tibial bone graft harvesting, providing objective data regarding stability as well as yield. This information would be useful during selection of source of autologous bone graft.     

Anteromedialisation tibial tubercle osteotomy for recurrent patellar instability in young active patients: A retrospective case series

IntroductionRecurrent patellar instability can be a source of continued pain and functional limitation in the young, active patient population. Instability in the setting of an elevated tibial tubercle–trochlear groove (TT–TG) distance can be effectively managed with a tibial tubercle osteotomy. At the present time, clinical outcome data are limited with respect to this surgical approach to patellar instability.MethodsA retrospective chart review was performed to identify all cases of tibial tubercle osteotomy for the management of patellar instability performed at our institution with at least 1 year of post-operative follow-up. Patient demographic information was collected along with relevant operative data. Each patient was evaluated post-operatively with their outcomes assessed utilising a visual analogue score of pain, patient satisfaction, Tegner Activity Scale and Kujala score.Results31 patients (23 females and 8 males) with mean age of 27 years (17–43 years) and a mean BMI of 26.3 kg/m² (19.6–35.8) at time of surgery who underwent a tibial tubercle osteotomy as treatment for recurrent patellar instability were identified. The cohort had a mean follow up of 4.4 years (1.5–11.8 years). The mean pre-operative TT–TG distance was 18 mm (10–22 mm). The mean VAS pain score demonstrated a significant improvement from 6.8 (95% CI 6.1–7.5) at baseline to 2.8 (95% CI 1.9–3.7) post-operatively (p < 0.001). The Tegner score improved from 4.1 (95% CI 3.4–4.8) pre-operatively to 5.2 (95% CI 4.5–5.9) at the time of final follow up (p < 0.04). The Kujala score for anterior knee pain improved postoperatively from 62 (95% CI 55.4–68.7) to 76.5 (95% CI 69.5–83.5) at final follow up (p < 0.001). 26 of the 31 patients (83.8%) had good to excellent Kujala scores. 27 of 31 patients (87.1%) reported that they would undergo the procedure again if necessary.ConclusionFor the management of recurrent patellar instability in the setting of an increased tibial tubercle–trochlear groove distance, a corrective tibial tubercle osteotomy is an effective treatment modality to reliably prevent patellar instability while reducing pain and improving function in this cohort of young, active patients.     

Shortening Scarf osteotomy for correction of severe hallux valgus. Does shortening affect the outcome?

BackgroundTranslation and shortening of Scarf osteotomy allows correction of severe hallux valgus deformity. Shortening may result in transfer metatarsalgia.AimTo evaluate outcome of patients undergoing shortening Scarf osteotomy for severe hallux valgus deformities.Materials and MethodsFifteen patients (20 feet, mean age 58 years) underwent shortening Scarf osteotomy for severe hallux valgus deformities. Outcomes were pre and postoperative AOFAS scores, IM and HV angles, patient satisfaction.ResultsMean follow-up was 25 months (range 22–30). The IM angle improved from a median of 18.60 (range 13.4–26.20) preoperatively to 9.70 (range 8.0–13.70) postoperatively (8.9; 95% CI = 7.6–10.3; p < 0.001). The HV angle improved from a mean of 43.2 (range 27.4–68.2) preoperatively to 13.6 (range 3.0–37.4) postoperatively (29.6; 95% CI = 26.1–33.2; p < 0.001).The median AOFAS score improved from 29.2 (range 14–60) preoperatively to 82.2 (range 55–100) postoperatively (53.0; 95% CI = 48.0–58.5; p < 0.001). All patients rated their satisfaction as either satisfied or very satisfied. None had symptoms of transfer metatarsalgia at final follow-up. All osteotomies united.ConclusionsShortening Scarf osteotomy is a viable option for treating severe hallux valgus deformities with no transfer metatarsalgia.     

Are bilateral tibial shaft fractures associated with an increased risk for adverse outcome?

IntroductionLong bone fractures are assumed to be an independent risk factor for systemic complications and death after trauma. Multiple studies have identified an increased risk for mortality and morbidity in patients with bilateral femoral fractures. Data about bilateral tibial shaft fractures is rare. The aim of our study was to analyze if patients with bilateral tibial shaft fractures are at higher risk for systemic complications.MethodsWe performed a retrospective analysis of the TraumaRegister DGU^® from 1993 to 2008. Inclusion criteria were unilateral or bilateral tibial shaft fractures and an age ≥16. Additionally to the overall collective we analyzed different subgroups (divided into different injury severities and treatment periods).Results1899 patients with unilateral and 175 patients with bilateral tibial shaft fractures were included. Age, gender and mean ISS (25.8 vs. 26.2, p = 0.51) in the two groups were comparable. Regarding the entire study population, patients with bilateral tibial shaft fractures showed no significant higher incidence of respiratory organ failure (29.5% vs. 23.1%, p = 0.076) or mortality (20.0% vs. 16.3%, p = 0.203). However, subgroup analysis showed a significant higher rate of pulmonary organ failure for bilateral tibial shaft fractures as compared to unilateral tibial shaft fractures in the group ISS < 25 (20.7% vs. 11.7%, p = 0.023). Multivariate regression analysis identified the additional tibial shaft fracture as an independent risk factor for pulmonary organ failure (OR = 1.56) but not for mortality.DiscussionThe additional tibial shaft fracture is an independent risk factor for pulmonary organ failure but not for multiple organ failure or mortality. The impact of the additional tibial shaft fracture is especially pronounced in less severely injured patients (ISS < 25). These findings are comparable to results of bilateral femoral fracture studies and we therefore suggest to treat patients with bilateral tibial shaft fractures with the same caution as those with bilateral femoral fractures.