Anterior cruciate ligament (ACL) is the most commonly injured knee ligament and its injury can result in limitations in activities of daily living and mobility. [1] Surgical treatment is suggested in active young athletes, in patients who have combined ligament injuries, concomitant meniscal lesions, persistent pain despite the conservative treatments, or knee instability. In this sense, anatomical reconstruction with grafting is a well-established surgical method in the treatment of ACL injury. [2,3] Autografting, allografting, and synthetic grafting methods have been previously described for ACLObjectives: This study aims to compare the postoperative change of femoral and tibial tunnel widths after hamstring tendon (HT) and bone-patellar tendon-bone (BPTB) autografting in primary anterior cruciate ligament (ACL) reconstruction surgery with the anteromedial portal technique.Patients and methods: This case-control and retrospective study included 39 patients (36 males, 3 females; mean age 30.1±7.9; range, 17 to 44 years) who underwent primary ACL reconstruction surgery with either BPTB autografting method (BPTB group, n=18) or HT autografting method (HT group, n=21) between March 2014 and December 2016. Femoral fixation was achieved with bioabsorbable screw in BPTB group and endobutton in HT group. Tibial fixation was achieved with bioabsorbable interference screw in both groups. Femoral and tibial tunnel widths of groups were compared on digital radiographs.Results: When we compared the baseline values with the second-year results, the mean of femoral tunnel widths were significantly lower on radiographs at the second-year evaluation in both groups (p<0.001 for all). However, the means of tibial tunnel widths were significantly lower only in the BPTB group (p<0.001 for BPTB group and p=0.616 for HT group). Change levels of anteroposterior and lateral widths were more prominent in BPTB group than HT group (p<0.001 for all). Conclusion:Changes in tunnel widths show us superior ossification in BPTB grafting. This can be explained by superior bone-to-bone healing. As a result of radiological evaluation, we think that BPTB grafting can be more strong and durable.

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Background: Ankle sprains occur frequently in both athletes and the general population. The social and economic consequences can be significant. In an effort to understand the injury, dynamic and static structures around the ankle have been investigated in detail, but anatomical factors predisposing to lateral ankle instability have not been fully clarified. The aim of this study was to radiologically investigate the relationship between bony variations of the distal tibiofibular joint and arthroscopically proven ankle instability. Methods: Fifty patients with arthroscopically proven ankle instability and 50 patients without instability were included in this study. Measurements were obtained from a magnetic resonance imaging (MRI) section 1 cm proximal to the tibiotalar joint; distal tibiofibular joint anterior facet length ( a), posterior facet length ( b), angle between the anterior and posterior facets ( c), fibular notch depth ( d), tibia thickness ( e), and fibula thickness ( f) was measured. Results: It was found that instability was more frequent when the length of a ( P < .001) and e ( P < .001) were shorter. In addition, when value of a/ b and e/f were evaluated, it was observed that the number of individuals who had instability increased as the ratio became smaller ( P < .016-.020, respectively). Pearson correlation analysis indicated strong negative correlation between the values of a- e and instability ( r = −0.348, P < .001, and r = −0.328, P = .001; respectively). Conclusion: Lateral ankle sprains are common, and a clear understanding of the relevant structures and clinical function of the ankle complex should extend beyond the talocrural joint. This study demonstrated that the presence of narrow anterior facet ( a) and thinner tibia ( e) were strongly correlated with lateral ankle instability. Level of Evidence: Level III, retrospective case control study.

Objectives This study aims to identify the most accurate dorsovolar principal axis of the distal radius and carpus identified on axial computed tomography (CT) sections and to establish normative data for angular measurements among these axes. Patients and methods Between December 2019 and December 2021, normal axial CT images of wrists of a total of 42 individuals (25 males, 17 females; mean age: 31±8.4 years; range, 18 to 45 years) were retrospectively analyzed. Eight axes were identified on axial CT images: four distal radial axes (the volar cortical, medial cortical, central, and sigmoid notch axes) and four carpal axes (the scapholunate, lunotriquetral, capitohamate, and pisotrapezial axes). Twenty-two angular parameters were measured with reference to four principal axes (the volar cortical, medial cortical, central, and pisotrapezial axes). Results The mean sigmoid notch rotation (version) angles relative to the four principal axes were 8±5° (range, –2° to 18°), 6±5° (range, –2° to 13°), 1±5° (range, –8° to 14°), and 4±4° (range, –3° to 15°), respectively. The mean scapholunate rotation angles were –13±5° (range, –27° to –6°), –15±6° (range, –29° to –8°), –21±5° (range, –30° to –11°), and –8±5° (range, –28° to –6°), respectively. Among four principal axes, the volar cortical and medial cortical axes were nearly collinear with both of relatively fixed carpal axes. The four principal axes showed angular differences between 2° and 8° with each other. There was no significant difference between men and women for all measurements. Conclusion The axial CT sections can be used to describe the various angulations between the normal wrist axes such as the sigmoid notch and scapholunate joint rotation angles. Despite slight differences among the four principal axes, the volar cortical and medial cortical axes are more consistent with the relatively fixed carpal axes.