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.     

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.     

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.     

桃红四物汤加减辅助手术治疗胫骨平台骨折的临床效果观察分析

目的 观察分析桃红四物汤加减辅助手术治疗胫骨平台骨折的临床效果.方法 以2014年6月至2015年6月在本院进行手术治疗的100例胫骨平台骨折患者为研究对象,其中50例患者在常规治疗及手术治疗的基础上加用桃红四物汤加减治疗,记为治疗组;另外50例患者仅采用常规治疗及手术治疗,记为对照组.通过观察比较两组患者术后7、14 d膝关节疼痛值、肿胀和术后100d膝关节AKS评分,分析桃红四物汤加减的临床疗效.结果 两组术后7、14 d膝关节疼痛值、肿胀情况比较,差异有统计学意义(P＜0.05).两组术后100 d膝关节AKS评分比较,治疗组优良率74％,对照组66％,差异有统计学意义(P＜0.05).结论 桃红四物汤加减辅助手术治疗胫骨平台骨折,临床效果显著,术后患者愈合快.     

Radiological evaluation of patellofemoral instability and possible causes of assessment errors

Patellofemoral instability (PI) is the disruption of the patella’s relationship with the trochlear groove as a result of abnormal movement of the patella. To identify the presence of PI, conventional radiographs (anteroposterior, lateral, and axial or skyline views), magnetic resonance imaging, and computed tomography are used. In this study, we examined four main instability factors: Trochlear dysplasia, patella alta, tibial tuberosity–trochlear groove distance, and patellar tilt. We also briefly review some of the other assessment methods used in the quantitative and qualitative assessment of the patellofemoral joint, such as patellar size and shape, lateral trochlear inclination, trochlear depth, trochlear angle, and sulcus angle, in cases of PI. In addition, we reviewed the evaluation of coronal alignment, femoral anteversion, and tibial torsion. Possible causes of error that can be made when evaluating these factors are examined. PI is a multi-factorial problem. Many problems affecting bone structure and muscles morphologically and functionally can cause this condition. It is necessary to understand normal anatomy and biomechanics to make more accurate radiological measurements and to identify causes. Knowing the possible causes of measurement errors that may occur during radiological measurements and avoiding these pitfalls can provide a more reliable road map for treatment. This determines whether the disease will be treated medically and with rehabilitation or surgery without causing further complications.     

Computer-assisted navigation in ACL reconstruction improves anatomic tunnel placement with similar clinical outcomes

BackgroundWhile the use of navigation systems in anterior cruciate ligament (ACL) reconstruction theoretically improves tunnel placement accuracy and clinical outcomes, the existing literature remains inconclusive. We aimed to evaluate the potential benefits of navigated ACL reconstruction on tunnel placement and clinical outcomes.MethodsIn this retrospective study, we evaluated a cohort of patients who underwent conventional or navigated (OrthoPilot system) primary ACL reconstruction at our institution from June 2004 to October 2009. Anteroposterior and lateral radiographic knee assessments were evaluated to assess postoperative tunnel positioning. Clinical outcomes, including the International Knee Documentation Committee classification, Lysholm score, and Tegner score, were evaluated preoperatively and 1-year postoperatively. Radiographic and clinical outcomes were compared and analysed using independent 2-sample t-tests and Chi-square tests.ResultsSixty patients met the inclusion criteria and were included for analysis, comprising of 26 navigated and 34 conventional reconstructions. Postoperative radiographs showed no differences in tibial tunnel position between both groups, but a significantly smaller deviation from the recommended position in the navigated group (navigated: 5.96 %; conventional: 7.92 %; p = 0.008). Femoral tunnel placements in the navigated group were significantly more perpendicularly away from the Blumensaat line (navigated: 38.90 %; conventional: 31.94 %; p = 0.001), with a greater deviation from recommended position (navigated: 11.00 %; conventional: 6.94 %; p = 0.009). There were no differences in 1-year postoperative clinical outcomes (p > 0.05).ConclusionNavigated ACL reconstruction resulted in a more anatomic femoral tunnel placement and similar clinical outcomes as conventional reconstruction. Further research should be conducted to clarify the potential biomechanical and clinical impacts of navigated ACL reconstruction.     

A soft ankle brace increases soleus Hoffman reflex amplitude but does not modify presynaptic inhibition during upright standing

External ankle supports, such as ankle braces, may improve postural stability by stimulating cutaneous receptors. It remains unknown whether these supports have an effect on the posture central regulation. The aim of this study was to determine the effect of wearing a soft ankle brace on soleus H-reflex amplitude and presynaptic inhibition during standing. Sixteen subjects stood on a rigid floor with their eyes opened, either barefoot or wearing a soft ankle brace. H-reflex amplitude was measured on the soleus muscle by stimulating the tibial nerve electrically. Modulation of presynaptic inhibition was assessed by conditioning the H-reflex with fibular nerve (D1 inhibition) and femoral nerve (heteronymous facilitation) electrical stimulations. The unconditioned H-reflex amplitude was significantly greater when wearing the ankle brace than barefoot, whereas D1 and HF conditioned soleus H-reflex did not differ significantly between bracing conditions. These results suggest that the ankle brace increased the soleus motoneuron excitability without altering presynaptic mechanisms, potentially because of increased cutaneous mechanoreceptors afferent signals provided by the soft ankle brace.     

The “Road to Union” protocol for the reconstruction of isolated complex high-energy tibial trauma

IntroductionThe purpose of this study was to describe a standardized staged approach, “The Road to Union”, for the reconstruction of isolated complex tibial trauma, both acute and chronic in nature.MethodsThis retrospective study included all patients treated for complex tibial trauma at a specialized limb reconstruction centre, including acute open fracture as well as infected and aseptic non-unions. This standardized approach includes eight specific steps, employed in sequence. The time in external fixation (EFT), the external fixation index (EFI), and the distraction consolidation index (DCI) were the primary outcome measures. The relationship between EFI and DCI was assessed using Pearson’s moment correlations.ResultsThirty-two patients with a mean age of 34.7 ± 14.2 years were included; 12 were treated for complex open tibial fractures with bone loss, 13 for infected non-unions, and 6 for aseptic non-union. The mean bone defect was 66 ± 32 mm. The total EFT was 42.5 ± 14.8 weeks; the EFI measured 51.9 ± 25.3 days/cm, and the DCI measured 48.3 ± 21.4 days/cm. Union was achieved in 29 out of 32 patients (91%), and there was a strong and significant relationship between EFI and DCI (r = 0.92, p = 0.0001) measurements. Pin site infections were observed in 11 patients, and 3 patients had persistent non-union. Three patients underwent delayed amputations when reconstructive procedures were unable to achieve union.ConclusionThe findings of this study demonstrate that a standardized staged treatment protocol of debridement, circular external fixation, soft-tissue management, distraction osteogenesis, and functional rehabilitation can result in a high rate of union in cases of complex tibial trauma, both acute and chronic in nature.Level of evidenceLevel IV; case series     

高压氧治疗成年患者胫骨骨折延迟愈合的临床疗效观察

目的观察高压氧疗法是否对治疗成年患者胫骨骨折延迟愈合有效,研究其在治疗成年胫骨骨折延迟愈合中的作用。方法选取2010年12月~2013年1月于吉林大学中日联谊医院收治的成年胫骨骨折延迟愈合的患者44例,将这些患者随机分为对照组和试验组,其中对照组22例,年龄29~57岁(平均年龄41岁);试验组(高压氧组)22例,年龄30~55岁(平均年龄40岁)。对照组给予促进骨折愈合药物(骨瓜提取物)静脉滴注治疗,并给予中频脉冲电治疗及功能康复训练。试验组在对照组的治疗基础上加用高压氧治疗。于第30天、60天、90天、120天、150天、180天各拍摄X线正侧位片,行骨痂影像观察并评分。采用SPSS11.5软件,采用χ2和t检验进行组间比较。结果 治疗6个月后,对照组痊愈4例,有效7例,无效11例,总有效率为50%,治愈率为18%;试验组:痊愈12例,有效9例,无效1例,总有效率为95%,治愈率为55%。两组总有效率、治愈率对比有统计学差异(P0.05)。结论 高压氧疗法对于治疗成年人胫骨骨折延迟愈合有效,高压氧治疗能够显著促进骨痂的形成。     

Effect of bioactive coating of the tibial component on migration pattern in uncemented total knee arthroplasty: a randomized RSA study of 14 knees presented according to new RSA-guidelines

Background  Bioactive coating of uncemented total knee arthroplasty (TKA) is believed to increase bone ingrowth and enhance early fixation of the TKA. In a prospective randomized study using radiostereometric analysis (RSA) we examined migrations of the tibial implant, in an uncemented TKA with and without bioactive coating. The study was performed according to new RSA guidelines, and focus was put on some important methodological issues. Materials and methods  Twenty-three patients with osteoarthrosis of the knee received an uncemented Duracon TKA either with bioactive (hydroxyapatite or periapatite) coating (+HA) or without bioactive coating (−HA). Patients had RSA examinations postoperatively and at 3, 6 and 12 months. Nine patients were excluded during the study resulting in 14 knees for final analysis. Results  At 12 months follow-up we found no significant differences in migrations between the two groups. However, in general the −HA group migrated more than the +HA group, and we found a significant larger variation in migration pattern in the −HA group. In the +HA group the tibia component stabilized after 6 months, whereas the −HA group showed continuous migration. Subsidence and posterior tilt were the main migration patterns in both groups. Conclusions  Bioactive coating of TKA seems to enhance early stabilization of the tibia component. Similar results are found in previous studies.