Which design tolerates rotational mismatch better in unicompartmental knee arthroplasty: fixed or mobile bearing?

Unicompartmental knee arthroplasty is an effective method for the treatment of medial compartment osteoarthritis. However, appropriate surgical tech- nique and optimum implant positioning are crucial for a satisfactory outcome. This study aimed to demonstrate the relation between the clinical scores and the alignment of the components in UKA. A total of 182 patients with medial compartment osteoarthritis and treated by UKA between January 2012 and January 2017 were enrolled in this study. Computed tomography (CT) was used to measure the rotation of components. Patients were divided into two groups according to the insert design. These groups were divided into three subgroups according to the angle of the tibia relative to the femur (TFRA) (A): TFRA 0° to 5° either internal or external rotation; (B): TFRA >5° internal rotation, and (C): TFRA >5° external rotation. There was no significant difference between the groups in terms of age, body mass index (BMI) and follow-up period. KSS scores increased as the tibial component rotation (TCR) external rotation increased, but there was no correlation for WOMAC score. (P: 0,039 r: 0,207; P:0,347 r:0,095, respectively) Post-operative KSS and WOMAC scores decreased as TFRA external rotation was increased. (p: 0,001; p:0,001, respectively) No correlation has been observed between femoral component rotation (FCR) internal rotation and post-operative KSS and WOMAC scores. (p: 0,261; p: 0,502, respectively) Any mismatch between the components is better tolerated by mobile-bearing designs compared to fixed-bearing designs. Orthopedic surgeons should take care of rotational mismatch of components, not only the axial alignment of the components.

The Combination of Inlay Patellofemoral Arthroplasty and Medial Unicompartmental Knee Arthroplasty Versus Total Knee Arthroplasty for Mediopatellofemoral Osteoarthritis: A Comparison of Mid-Term Outcomes.

BACKGROUND: To the best of our knowledge, there have been no studies in the literature related to the use of second-generation inlay patellofemoral arthroplasty and unicompartmental knee arthroplasty combination (inlay PFA/UKA) in the treatment of mediopatellofemoral osteoarthritis (MPFOA). The aim of this study is to evaluate the efficacy of inlay PFA/UKA in MPFOA. METHODS: The study included 49 patients applied with inlay PFA/UKA because of MPFOA and 49 patients applied with TKA, matched one-to-one according to age, gender, body mass index, follow-up period, preoperative Knee Society Score, and range of motion. All the patients were evaluated clinically using the Knee Society Score, Knee Injury Osteoarthritis Outcome Score, and range of motion, and were also evaluated radiologically. Complication rates and length of hospital stay were compared. RESULTS: The mean follow-up period was 54 ± 4 and 54.4 ± 3.9 months in inlay PFA/UKA and TKA groups, respectively. (P = .841). No statistically significant difference was determined between the 2 groups in respect of the mean clinical scores at the final follow-up examination (P ≥ .129). Total complications were fewer and length of hospital stay was shorter in the inlay PFA/UKA group than in the TKA group (P = .037 and P = .002). There was no radiographic evidence of progression of lateral compartment osteoarthritis according to Kellgren-Lawrence in any patient in the inlay PFA/UKA group. CONCLUSION: In selected patient groups, inlay PFA/UKA is an alternative to TKA, with lower complication rates, shorter length of hospital stay, and clinical and functional results similar to those of TKA without osteoarthritis progression in the unresurfaced lateral compartment in the mid-term. LEVEL OF EVIDENCE: III.

Placement of Standard Sized Acetabular Cup Between True and False Acetabulum in Patients with Crowe III/IV Dysplasia: A Safe Option in THA Without Femoral Osteotomy.

Introduction: There is no consensus in literature on the surgical treatment of patients with Crowe type III/IV patients. Each arthroplasty procedure has its own advantages and disadvantages. In this study by placing the acetabular cup between the true and false acetabulum, we aimed to share our experience about criteria of patient selection, surgical technique, and mid-term results of THA (total hip arthroplasty) in which the risk of dislocation was minimized using a standard-sized acetabular cup. Materials and Methods: We reviewed the clinical and radiographic data of the patients with Crowe type III/IV treated by cementless THA without femoral shortening osteotomy from January 2015 to January 2020. The clinical (Harris hip score, Trendelenburg sign, limb lengths) and radiographic (AP/L hip X-ray, 3D CT) examinations before surgery; 1, 3 months and 1 year after the surgery were evaluated. All postsurgical complications were noted. Results: Among all, 268 patients met the inclusion criteria. Thirty-two patients (11.9%) were male and 236 (88.1%) were female. Mean age was 46.8 years. Mean follow-up duration was 42.4 (26-57) months. Mean Harris Hip score (HHS) was 49.7 and Trendelenburg sign was positive in all patients preoperatively. In the final evaluation, mean HHS significantly improved to 80.2 (p < 0.005) and none of the patients had Trendelenburg sign. Mean lengthening of the operated leg was 4.3 cm. Conclusion: Total hip arthroplasty with placement of acetabular cup between true and false acetabulum can be successfully preferred in selected patients with Crowe III/IV dysplasia.

A New Concept of Mosaicplasty: Autologous Osteoperiosteal Cylinder Graft Covered With Cellularized Scaffold.

A concern regarding osteochondral autograft transfer for chondral defects is donor-site morbidity of the knee, the most common source of the autograft. To avoid the drawbacks of osteochondral autograft transfer, a cylindrical osteoperiosteal graft harvested from the iliac crest covered by a same-sized cylinder of hyaluronic acid-based polymer scaffold pretreated with bone marrow aspirate concentrate and transferred to the chondral defect recipient site in the exact size for restoration of the subchondral bone and the articular cartilage.

Open reduction internal fixation versus minimally invasive percutaneous fixation for calcaneus fractures: Mid-term outcomes and social consequences.

OBJECTIVES: This study aims to evaluate the mid-term clinical, functional, radiological, and socioeconomic outcomes of calcaneus fractures treated with open reduction-internal fixation (ORIF) versus minimally invasive percutaneous fixation (MIPF). PATIENTS AND METHODS: A total of 48 patients (34 males, 14 females; mean age: 44.05 years; range, 19 to 64 years) who underwent either ORIF or MIPF for calcaneus fractures between January 2010 and January 2016 were retrospectively analyzed. The patients were divided into two groups as the ORIF group (n=36) and MIPF group (n=12). The American Orthopaedic Foot & Ankle Society (AOFAS) score, Maryland Foot Score (MFS), and the Short Form-36 (SF-36) scores were assessed for the clinical assessment. The mean duration of operation, mean length of hospitalization, pedobarographic gait analysis, the incidence of contralateral knee pain, increased shoe size, and change of profession due to significant heel pain were also evaluated. The Böhler's angle, Gissane angle, and calcaneal varus were measured for radiological assessment. RESULTS: There was a significant difference in the mean operation time (p=0.001) and length of hospitalization (p=0.001) between the two groups. There was no significant difference between the pre- and postoperative third-year Böhler's and Gissane angles (p=0.05, p=0.07, p=0.09, respectively). There were no significant differences between the postoperative first-, second-, and third-year AOFAS, MFS, and SF-36 scores (p=0.57, p=0.55 p=0.85, p=0.64, p=0.21, p=0.51, p=0.20, p=0.15, p=0.22, respectively). Thirteen patients in the ORIF group and five patients in the MIPF group changed their job due to significant heel pain. The increased shoe size was correlated with the residual calcaneal varus (p=0.001). CONCLUSION: Both methods have pros and cons in the treatment of calcaneal fractures. Although MIPF is more advantageous in terms of operation duration and length of hospitalization, more favorable radiological results can be obtained with ORIF. Calcaneal varus should be corrected to prevent the increased shoe size and contralateral knee pain.

Mid-term outcomes of arthroscopic suture fixation technique in tibial spine fractures in the pediatric population.

BACKGROUND: Tibial spine fractures are avulsion injuries that are a similar mechanism to anterior cruciate ligament rupture. Although its incidence is not very common, it can cause possible complications and permanent sequelae in the knee joint if not treated correctly. The aim of this study was to evaluate the mid-term results of the arthroscopic suture technique for tibial spine fractures in a pediatric population. METHODS: Analyzed retrospectively were 28 patients who underwent the arthroscopic suture fixation technique at our clinic, due to type 2 (with >5 mm displacement), 3 and 4 tibial spine fractures, between January 2013 and December 2017. The demographic features, injury mechanism, fracture classification, mean follow-up time, radiographic healing time, return to activity time, instability examination, joint range of motion (ROM), and knee injury and Osteoarthritis Outcome Score (KOOS) parameters of the patients were evaluated both clinically and functionally. RESULTS: The mean age of the patients was 14.2. In addition, 17 patients were male (61%) and 20 had a healthy body mass index (71%). According to the modified Meyer and McKeever classification, type 2 tibial spine fracture was most common. The mean follow-up period was 4.64 years and the mean radiological healing time was calculated as 2.17 months. Of these patients, 27 were fully functional in terms of ROM (96%). Secondary surgery was performed on 1 patient due to arthrofibrosis and severely limited ROM. The mean 6-month KOOS was 82.3, while the 12-month KOOS was 91.4 and the 24-month KOOS was 95.7. A significant difference was observed between these scores (p=0.024). CONCLUSION: The outcomes of the arthroscopic suture technique for the treatment of tibial spine fractures in a pediatric population were both clinically and functionally satisfactory. Anatomic reduction and early rehabilitation increased the success rate in the treatment of these fractures. Longer follow-up will provide more information.

Comparative Analysis of Single Lateral Locked Plate and Double Locked Plate Application in the Treatment of Bicondylar Tibial Plateau Fractures.

Background and objective Bicondylar tibial plateau fractures (BTPFs) have been controversial in terms of surgery planning, due to articular joint surface comminution, severe soft tissue injury, and the risk of complications. The aim of this study was to conduct a clinical, functional, and radiologic comparison of the dual locked plate (DLP) and single lateral locked plate (SLLP) techniques. Methods Retrospectively analysed were 54 patients who underwent surgical treatment with DLP or SLLP due to the diagnosis of BTPFs, between January 2018 and June 2020. Patients were evaluated in the clinic with regard to their demographic characteristics, mechanisms of injury, follow-up periods, measurement of the range of motion degrees, functional scores, and radiographic parameters. The Knee Injury and Osteoarthritis Outcome Score (KOOS), Lysholm Knee Score (Lysholm) and Oxford Knee Score (OKS) were chosen as the functional scores. The condylar width, medial proximal tibial angle (MPTA), posterior tibial slope (PTS) and fracture union time were calculated radiographically. Results The patients in the DLP group achieved significantly higher scores for all three scales when the KOOS, Lysholm, and OKS, respectively (P = 0.008, P = 0.048, P = 0.006), were compared. Radiographically, the mean increase in the condylar width of 1.72 mm in the DLP group and 2.59 mm in the SLLP group was measured (P = 0.010, P = 0.010, respectively). The mean decrease in MPTA was 1.75° in the DLP group and 3.54° in the SLLP group, which was statistically significant (P = 0.005, P = 0.001, respectively). An increase in the posterior tibial slope was measured at a mean of 1.8° in the DLP group and 1.4° in the SLLP group (P = 0.001, P = 0.008, respectively). On the other hand, when the condylar width, MPTA and PTS between the DLP and SLLP groups were compared, no significant difference was found (P = 0.179, P = 0.247, P = 0.611, respectively). Conclusion Better results were obtained in patients who underwent the DLP procedure when compared to those who had the SLLP. There was no radiographic difference between the two surgical procedures. Although DLP is an effective and reliable method in the treatment of BTPFs, the SLLP procedure also provides satisfactory results in patients with appropriate indications.