Background: Lateral hinge fracture (LHF) is associated with nonunion and plate breakage in high tibial osteotomy (HTO). Mechanical studies investigating fixation strategies for LHFs to restore stability and avoid plate breakage are absent. This study used computer simulation to compare mechanical stabilities in HTO for different LHFs fixed with medial and bilateral locking plates. Methods: A finite element knee model was created with HTO and three types of LHF, namely T1, T2, and T3 fractures, based on the Takeuchi classification. Either medial plating or bilateral plating was used to fix the HTO with LHFs. Furthermore, the significance of the locking screw at the combi hole (D-hole) of the medial TomoFix plate was evaluated. Results: The osteotomy gap shortening distance increased from 0.53 to 0.76, 0.79, and 0.72 mm after T1, T2, and T3 LHFs, respectively, with medial plating only. Bilateral plating could efficiently restore stability and maintain the osteotomy gap. Furthermore, using the D-hole screw reduced the peak stress on the medial plate by 28.7% (from 495 to 353 MPa), 26.6% (from 470 to 345 MPa), and 32.6% (from 454 to 306 MPa) in T1, T2, and T3 LHFs, respectively. Conclusion: Bilateral plating is a recommended strategy to restore HTO stability in LHFs. Furthermore, using a D-hole locking screw is strongly recommended to reduce the stress on the medial plate for lowering plate breakage risk.

Background: Functional recovery following the surgical fixation of acetabular posterior wall fractures remains a challenge. This study compares outcomes of posterior wall fracture reconstruction using an anatomical posterior acetabular plate (APAP) versus conventional reconstruction plates. Methods: Forty patients with acetabular fractures involving the posterior wall or column underwent surgery, with 20 treated using APAPs (APAP group) and 20 with conventional pelvic reconstruction plates (control group). Baseline patient characteristics, intraoperative blood loss and time, reduction quality, postoperative function, and postoperative complications were compared using appropriate non-parametric statistical tests. A general linear model for repeated measures analysis of variance was employed to analyze trends in functional recovery. Results: No significant differences were observed in baseline characteristics. APAP significantly reduced surgical time by 40 min (186.5 ± 51.0 versus 225.0 ± 47.7, p =0.004) and blood loss (695 ± 393 versus 930 ± 609, p = 0.049) compared to conventional plates. At 3 and 6 months following surgery, the APAP group exhibited higher functional scores (modified Merle d’Aubigné scores 10 ± 1.8 versus 7.8 ± 1.4, p < 0.001; 13.4 ± 2.8 versus 10.1 ± 2.1, p = 0.001), converging with the control group by 12 months (modified Merle d’Aubigné scores 14.2 ± 2.6 versus 12.7 ± 2.6, p = 0.072; OHS 31.6 ± 12.3 versus 30.3 ± 10.1, p = 0.398). Radiologically, the APAP group demonstrated superior outcomes (p = 0.047). Complication and conversion rates to hip arthroplasty did not significantly differ between groups (10% versus 15%, p = 0.633). Conclusions: The use of an APAP in reconstructing the posterior acetabulum significantly reduces surgical time, decreases intraoperative blood loss, and leads to earlier functional recovery compared to conventional reconstruction plates. The APAP provides stable fixation of the posterior wall and ensures the durable maintenance of reduction, ultimately yielding favorable surgical outcomes.

This study evaluated the safety and clinical efficacy of an innovative anatomical locking plate known as the anatomical posterior acetabular plate (APAP) for posterior plating for acetabular fractures. From January 2015 to December 2018, 19 patients who had posterior wall or posterior column fractures and underwent open reduction and internal fixation (ORIF) with the APAP using the standard Kocher–Langenbeck approach were included. Relevant surgical data were collected for clinical evaluation. Reduction quality was graded according to Matta’s radiological criteria. Functional outcomes were evaluated using the modified Merle d’Aubigné scoring system and the Oxford Hip Score (OHS) questionnaire. Satisfactory anatomical reduction was achieved in 16 (84.2%) patients. The final modified Merle d’Aubigné scores were excellent for one hip (5.3%), good for ten hips (52.6%), fair for six hips (31.6%), and poor for two hips (10.5%). The mean OHS was 33.3 (10–44). The incidence of heterotopic ossification, posttraumatic osteoarthritis, and osteonecrosis of the femoral head was 10.5%, 21%, and 26.3%, respectively. The rate of conversion to total hip arthroplasty was 15.8% after 4 years. The results of this study indicate that the APAP provides adequate fixation and satisfactory short-term results in treating posterior acetabular fractures.

Background: Scapular body fractures, when significantly displaced or malunited, can cause glenohumeral discomfort and functional disability. This study compares single- and dual-plating techniques in terms of pain, function, and active range of motion (aROM) in patients with scapular body fractures. Methods: Twenty-eight patients with scapular fractures were retrospectively analyzed, with sixteen undergoing single plating treatment and twelve dual plating treatment. The mean age was 44.9 years, and the mean follow-up was 14 months for single plating and 13.8 months for dual plating. Outcomes included Disabilities of the Arm, Shoulder and Hand (DASH) scores, the Visual Analog Scale (VAS) for pain, aROM measurements, and the time to return to work. Functional outcomes were assessed using two-way ANOVA with Šidák’s multiple comparisons test at 2 weeks, 4 weeks, 3 months, 6 months, and 1 year. The time to return to work was analyzed with survival analysis and a log-rank test. Results: The single plating group had higher DASH scores than the dual plating group at 2 weeks (44.88 ± 10.81 vs. 32.75 ± 6.05, p = 0.005), 4 weeks (28.50 ± 5.91 vs. 22.83 ± 4.24, p = 0.033), and 3 months (19.63 ± 2.45 vs. 16.00 ± 2.45, p = 0.004), indicating greater disability. VAS scores were also higher in the single plating group at 2 weeks (4.00 ± 1.21 vs. 2.33 ± 0.88, p = 0.002) and 4 weeks (2.50 ± 1.03 vs. 1.17 ± 0.94, p = 0.008), suggesting faster pain relief in the dual plating group. However, differences were no longer significant after 3 months. At 1 year, the dual plating group demonstrated better external rotation (73 ± 3° vs. 63 ± 5°, p = 0.032), with no significant differences in internal rotation, abduction, or forward flexion. Dual plating patients returned to work earlier (Hazard Ratio = 3.346, 95% CI: 1.208 to 9.269, p = 0.020). Conclusions: In the current cohort, dual plating for scapular fractures offers superior early pain relief and functional outcomes compared to single plating, along with better external rotation at 1 year and an earlier return to work. These findings suggest that dual plating may facilitate faster recovery and enhanced active range of motion in selected patients, a hypothesis that warrants further investigation through future randomized trials.