Fibroblast Growth Factor Soaked Collagen Membrane Shows No Biomechanical or Histological Advantages in the Treatment of Chronic Rotator Cuff Tears in a Rabbit Model.

PURPOSE: To investigate the histological and biomechanical effects of a fibroblast growth factor (FGF-2)-soaked collagen membrane used to treat a full-thickness chronic rotator cuff (RC) rupture in a rabbit model. METHODS: Forty-eight shoulders from 24 rabbits were used. At the beginning of the procedure, 8 rabbits were killed to assess the control group (Group IT) with intact tendons. To establish a chronic RC tear model, a full-thickness subscapularis tear was created on both shoulders of the remaining 16 rabbits and left for 3 months. The transosseous mattress suture technique was used to repair tears in the left shoulder (Group R). The tears in the right shoulder (Group CM) were treated using the same approach, with an FGF-soaked collagen membrane inserted and sutured over the repair site. Three months after the procedure, all rabbits were killed. Biomechanical testing was performed on the tendons to determine failure load, linear stiffness, elongation intervals, and displacement. Histologically, the modified Watkins score was used to evaluate tendon-bone healing. RESULTS: There was no significant difference among the three groups in terms of failure load, displacement, linear stiffness, and elongation (P > .05). The total modified Watkins score was not affected by applying the FGF-soaked collagen membrane to the repair site (P > .05). Fibrocytes, parallel cells, large-diameter fibers, and the total modified Watkins score were significantly lower in both repair groups when compared to the intact tendon group (P < .05). CONCLUSIONS: In addition to tendon repair, FGF-2 soaked collagen membrane -application at the repair site provides neither biomechanical nor histological advantages in the treatment of chronic RC tears. CLINICAL RELEVANCE: FGF-soaked collagen membrane augmentation provides no impact on the chronic RC tear healing tissue. The need to investigate alternative methods that may have a positive effect on healing in chronic RC repairs continues.

Sonication of explants enhances the diagnostic accuracy of synovial fluid and tissue cultures and can help determine the appropriate antibiotic therapy for prosthetic joint infections.

PURPOSES: This study aimed to evaluate the sensitivity and specificity of the sonication cultures according to the International Consensus Meeting 2018 criteria and to evaluate the effect of sonication on the antibiotic treatment of patients. METHODS: Sixty-four patients who were scheduled for revision hip or knee arthroplasties were included in the study. Aspiration fluid, tissue, and sonication cultures were performed from all patients and compared in terms of sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and overall accuracy. Other targets of the study were to investigate the rate of change in the antibiotic treatment. RESULTS: The sensitivity, specificity, PPV, NPV, and overall accuracy of the fluid culture obtained by the sonication method were 71.4%, 96.6%, 96.2%, 73.7%, and 82.8%, respectively. The sensitivity, specificity, PPV, NPV, and overall accuracy of the fluid culture obtained after tissue sampling were 68.6%, 100%, 100.0%, 72.5%, and 82.8%, respectively. There was no statistically significant difference between the sonication method and tissue culture in terms of sensitivity and specificity (p = 1.0). The sensitivity, specificity, PPV, NPV, and overall accuracy of the fluid culture obtained by the aspiration method were 28.6%, 93.1%, 83.3%, 51.9%, and 57.8%, respectively. Treatment change was applied in 10 (15.6%) patients. CONCLUSION: Our prospectively collected data revealed that sonication of the explants alone did not increase the sensitivity, and we found that sonicate culture sometimes changed the antibiotic therapy strategy in patients with periprosthetic joint infection because different microorganisms were detected. TRIAL REGISTRATION: This study was prospectively registered in a public trials registry ( https://clinicaltrials.gov/ , NCT04304885).

Could intermittent change of conventional dressing affect risk of periprosthetic joint infection after primary total joint arthroplasty?

PURPOSE: Periprosthetic joint infection (PJI) is one of the most dreaded and challenging complications after total joint arthroplasty (TJA). The aim of this study was to evaluate the effect of keeping the dressing without change on the occurrence of PJI in patients undergoing TJA. METHODS: 4877 Patients with a minimum follow-up of 90 days were included to investigate the effect of dressing on the PJI occurring within 3 months of surgery. Patients were divided into two consecutive groups as the intermittent change of traditional dressing (group 1-before 2019) and keeping dressing for 5 days without change (group 2-after 2019). A backward stepwise logistic regression model was used to estimate independent risk factors for PJI. RESULTS: Group 1 and group 2 consisted of 4172 and 705 patients, and the numbers of diagnosed PJI cases in the groups were 40 (1.0%) and 10 (1.4%), respectively (p = 0.1). The backward stepwise logistic regression model analysis revealed that keeping the dressing unchanged and removing it after the first week postoperatively was not an independent risk factor for the occurrence of PJI. Older age, diabetes mellitus and coronary artery diseases were independent risk factors for PJI (p < 0.05). CONCLUSION: Our study results present, that intermittent change of conventional dressing is unnecessary, because it does not decrease the risk of PJI after TJA. LEVEL OF EVIDENCE: Level III Therapeutic.

Two-surgeon simultaneous bilateral total knee arthroplasty does not provide poor prosthetic alignment : A prospective randomized controlled study.

PURPOSE: Two-surgeon, simultaneous bilateral total knee arthroplasty (TKA) is considered as an unpredictable, complex procedure in terms of its radiographic and functional outcomes because of different surgeons and teams, and too many instruments and hands in a narrow space. We compared radiological and functional results of simultaneous bilateral TKA and single-surgeon sequential bilateral TKA. METHODS: The 136 participants with a minimum of 24 months follow-up were prospectively randomized into 2 groups: two-surgeon bilateral TKA and single-surgeon bilateral TKA. We prespecified primary outcome of the study as between-group differences in terms of component alignment in the coronal and sagittal planes. Short-term functional outcomes were evaluated prospectively using the Oxford Knee Score (OKS) and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC). RESULTS: Each group consisted of 136 knees of 68 patients. The mean tibial medial angles (TMA) were 89°â€¯± 3 ° and 88°â€¯± 5° in two-surgeons and single surgeon groups, respectively (p = 0.24). Radiological outcomes showed that the mean femoral lateral angles (FLA) were 87.9 ± 3.5° and 85.84 ± 3.7° (p = 0.12), posterior tibial slope angles (PTSA) were 8.2 ± 16.9° and 7.6 ± 17.8° (p = 0.84), and femoral flexion angles (FFA)were 86.8 ± 3.8° and 86.3 ± 3.5° (p = 0.41), anterior femoral offset ratios (AFOR) (%) were 29.5 ± 11.1 and 27.7 ± 7.9 (p = 0.31), and posterior femoral offset ratio (PFOR) (%) were 108.41 ± 31.3 and 108.45 ± 25.7 (p = 0.98), respectively. CONCLUSION: Two-team simultaneous bilateral TKA is as safe as single stage one-surgeon sequential bilateral TKA in terms of short-term component radiological and the functional outcomes.

Comparison of tapered-wedge short and standard-length femoral stems in single-stage bilateral direct anterior total hip arthroplasty.

PURPOSE: This study was performed to compare short and standard-length tapered-wedge-type femoral stems in single-stage bilateral total hip arthroplasty (THA) through a direct anterior approach (DAA). MATERIALS AND METHODS: The patients were divided into two groups according to their femoral stem types as short tapered-wedge stem and standard-length tapered-wedge stem groups. Outcome parameters were the surgical time, estimated blood loss (EBL), length of stay (LOS), thigh pain, Harris Hip Score (HHS), and visual analog scale (VAS) score clinically, and canal fill ratio (CFR), coronal plan alignment of the stems, subsidence, and postoperative leg length difference (LLD), radiologically. RESULTS: The short-stem group and standard-length-stem group consisted of 20 patients (40 hips, mean age 52.0 ± 14.1) and 22 patients (44 hips, mean age 49.4 ± 11.9), respectively. There were no significant differences between the groups in terms of mean surgical times (p = 0.6), EBL (p = 0.2), LOS (p = 0.2), the rate of thigh pain (p = 0.4), improvements in HHS (p = 0.4) and VAS scores (p = 0.6), LLD (p = 0.3), amount of subsidence (p = 0.9), and varus or valgus misalignment (p = 0.7). The CFR at the level of the lesser trochanter was significantly higher in the short-stem group (0.79 ± 0.1) than the standard-length-stem group (0.73 ± 0.1) (p < 0.01). CONCLUSION: In single-stage bilateral THA through DAA, short, tapered-wedge femoral stems provide similar radiographic and functional results to standard stems at short-term follow-up.

Onlay fibula autografting technique and its comparison with cortical allograft for the reconstruction of periprosthetic bone defects around the femur.

BACKGROUND: Bone defect around the femur related to revisions or periprosthetic fractures (PFF) is an issue. We present a bone defect reconstruction technique in femoral revisions and/or PFF using fibula autograft and compared our radiological and clinical results to that of allograft. METHODS: A total of 53 patients who underwent revision hip arthroplasty and/or PFF fixation with the use of cortical fibula autograft (FG group) or cortical allograft (CG group) were evaluated. After exclusions, 20 patients who had minimum two years of follow-up were investigated for each group, for their radiological and clinical outcomes. RESULTS: In FG and CG groups, the median ages were 69.5(44-90) and 62(38-88) years, follow-ups were 59(28-72) and 120(48-216) months, defect lengths were seven (1-10) and ten (1-17) cm, and grafts lengths were 16.5(10-30) and 20(12-37) cm, respectively. The rate of graft incorporation was 90% in each group and median time to incorporations were seven (4-12) and 12(6-24) months (p < 0.001), and graft resorption (moderate and severe) rates were 10% and 25% (p = 0.41), respectively. Median Harris Hip (77.6 vs 78.0), WOMAC (23.2 vs 22), SF-12 physical (50.0 vs 46.1), and SF-12 mental (53.8 vs 52.5) scores were similar between the groups, respectively. Kaplan-Meier survivorship analyses revealed an estimated mean survival of 100% at six years in FG group and 90% at 14 years in CG group. CONCLUSION: In the reconstruction of periprosthetic bone defects after femoral revision or PPF, onlay cortical fibula autografts provide comparable clinical and radiological outcomes to allografts. Its incorporation is faster, it is cost-effective and easy to obtain without apparent morbidity.

Does performing total joint arthroplasty in the afternoon or evening increase the risk of prosthetic joint infection?

PURPOSE: Does performing total joint arthroplasty in the afternoon or evening increase the rate of early prosthetic joint infection and the likelihood of early prosthetic joint infection? METHODS: We evaluated patients retrospectively, who underwent primary total hip (THA) or knee arthroplasty (TKA) between January 2016 and December 2019, met the inclusion criteria and had at least 90 days of follow-up. Patients were divided into two groups. Group I consisted of patients whose surgeries had been started and finished before 14:00, and group II included patients whose surgeries started after 14:01. All patients were operated after non-septic cases in specific orthopedic operating rooms. Their demographic data and comorbidities were noted. Primary outcome was to compare the risk of PJI between the groups. RESULTS: Group I and group II included 2309 and 1881 patients. Total number of patients with the diagnosis of PJI was 58 (1.4%). It was 31 (1.3%) and 27 (1.4%), respectively (p = 0.79). Performing total joint arthroplasty after 14:01 did not increase likelihood of infection (p = 0.83, OR 1.03). Among the parameters, PJI was significantly associated with age (p < 0.01, OR 0.99), smoking status (p < 0.01, OR 0.15) and operating time (p = 0.04, OR 0.99) in TKA and with direct anterior approach (p = 0.02, OR 4.72) in THA. Age (p = 0.06, OR 1.03) was the factor affecting the risk of subsequent PJI after total joint arthroplasty. CONCLUSION: Performing total joint arthroplasty in the afternoon or in the evening, after aseptic cases does not increase the risk of subsequent of PJI.

Safety of one-stage bilateral total knee arthroplasty -one surgeon sequential vs. two surgeons simultaneous: a randomized controlled study.

PURPOSE: This study aimed to examine the complications by comparing two surgeons simultaneous bilateral total knee arthroplasty (two-surgeon bilateral TKA) to one surgeon sequential bilateral total knee arthroplasty (single-surgeon bilateral TKA). METHODS: Two hundred forty-six participants were prospectively randomized into two groups: two-surgeon bilateral TKA and single-surgeon bilateral TKA. While two surgeons performed simultaneous total knee arthroplasty in the two-surgeon bilateral TKA group, one surgeon performed sequentially in the single-surgeon bilateral TKA group. Ninety-day major, and minor complications rate, operative time, estimated blood loss (EBL) and patient-reported outcome measures were analysed. RESULTS: The two surgeons operated in two-surgeon bilateral TKA group 246 knees in 123 patients, while the single surgeon operated in single-surgeon bilateral TKA group 246 knees of 123 patients. The median operating time was 120 (range 70-151) minutes in the two-surgeon bilateral TKA group and 140 (range 75-190) minutes in the single-surgeon bilateral TKA group (p < 0.001). The median EBL was higher in the two-surgeon bilateral TKA group (p < 0.001). The 90-day complications were two major complications (1.6%) in the two-surgeon bilateral TKA group and 11 (8.9%) in the single-surgeon bilateral TKA group (p = 0.01). CONCLUSION: Two-surgeon simultaneous bilateral TKA is a safe method with lower complication rates compared with single-surgeon sequential bilateral TKA and can be preferred for experienced teams. However, peri- and post-operative care is required to decrease the risk of bleeding, particularly in patients undergoing two-surgeon simultaneous bilateral TKA. TRIAL REGISTRATION: This study was retrospectively registered in a public trials registry ( https://clinicaltrials.gov/ , NCT04299516).

Investigation of the changing etiology and risk factors of prosthetic joint infections : a university hospital surveillance study from 2011-2017.

We sought to characterize the causative pathogens of prosthetic joint infections (PJIs), evaluate the trends in microbial etiologies, and identify potential risk factors for PJI. This was a retrospective study analyzing 70 patients with PJI following 3,253 total joint arthroplasties between 2011 and 2017. Staphylococci were the most common cause of infection (52.9%). There was a significant trend in the percentage of carbapenem-resistant gram-negative bacilli (GNB) (increased to 66.7% in 2016 from 0.0% in 2011) (p=0.021). GNB and polymicrobial etiology were found at significantly high levels in cases involving early PJIs (p=0.005 and p=0.048, respectively). While staphylococci were significantly higher in PJIs after total knee arthroplasty (75%), GNB were significantly higher in PJIs after total hip arthroplasty (49.1%) (p<0.001 and p=0.001, respectively). Binary logistic regression analysis showed that the risk of PJI was significantly higher in cases with fracture and diabetes mellitus (odds ratio [OR], 4.3, 95% confidence interval [CI], 1.78-10.5 ; OR, 4.1, 95% CI, 1.66-10.5, respectively). These results suggest that the empirical and targeted antimicrobial treatment of PJIs may become more difficult in the future.

Anthropometric measurements of tibial plateau and correlation with the current tibial implants.

PURPOSE: The aim of the study was to make an anthropometric analysis at the resected surfaces of the proximal tibia in the Turkish population and to compare the data with the dimensions of tibial components in current use. We hypothesized that tibial components currently available on the market do not fulfil the requirements of this population and a new tibial component design may be required, especially for female patients with small stature. METHODS: Anthropometric data from the proximal tibia of 226 knees in 226 Turkish subjects were measured using magnetic resonance imaging. We measured the mediolateral, middle anteroposterior, medial and lateral anteroposterior dimensions and the aspect ratio of the resected proximal tibial surface. All morphological data were compared with the dimensions of five contemporary tibial implants, including asymmetric and symmetric design types. RESULTS: The dimensions of the tibial plateau of Turkish knees demonstrated significant differences according to gender (P < 0.05). Among the different tibial implants reviewed, neither asymmetric nor symmetric designs exhibited a perfect conformity to proximal tibial morphology in size and shape. The vast majority of tibial implants involved in this study tend to overhang anteroposteriorly, and a statistically significant number of women (21 %, P < 0.05) had tibial anteroposterior diameters smaller than the smallest available tibial component. CONCLUSION: Tibial components designed according to anthropometric measurements of Western populations do not perfectly meet the requirements of Turkish population. These data could provide the basis for designing the optimal and smaller tibial component for this population, especially for women, is required for best fit. LEVEL OF EVIDENCE: II.

Biomechanical Comparison of 2 Different Femoral Stems in the Shortening Osteotomy of the High-Riding Hip.

BACKGROUND: We hypothesized that a rectangular cross-sectional femoral stem may produce more initial stability of the transverse subtrochanteric femoral shortening osteotomy rather than a circular cross-sectional stem. METHODS: Twenty, fourth-generation, synthetic femur models were inserted with either circular or rectangular cross-sectional femoral stems after 3 cm of transverse subtrochanteric shortening. Half of the models were tested with axial bending and the other half with torsional loads. After the femora underwent cyclic loading, they were loaded until failure. Outcome parameters were stiffness values before and after cyclical loading, failure loads/torques, and displacements at the osteotomy sites. RESULTS: In axial bending tests, the results were not significantly different between the groups. Under rotational forces, the mean stiffness value before cyclical loading and failure torque of the cylindrical stems was significantly higher than that of rectangular cross-sectional stems (11.8 ± 1.2 vs 7.1 ± 2.8 Nm/degree; P = .009 and 136.9 ± 60.2 vs 27.1 ± 17.5 Nm; P = .027 Nm, respectively). The mean amounts of displacements at the osteotomy sites were not significantly different between the groups in any direction in both axial and rotational tests. CONCLUSIONS: According to the results of the study, using straight, cylindrical femoral stems can increase rotational stability of the transverse osteotomy more than the rectangular cross-sectional stems although the latter one has the advantages of rectangular geometrical design.

Acetabular dysplasia may be related to global joint hyperlaxity.

PURPOSE: Some patients with shoulder laxity complain of coxalgia without a history of trauma. We hypothesised that patients who have recurrent shoulder instability accompanied with generalised joint hyperlaxity tend to have acetabular dysplasia. METHODS: Pelvic radiographs of 26 young patients with hyperlaxity who had shoulder instability complaints without any history of hip joint trauma were evaluated by measuring their centre-edge angle (CEA) and acetabular angle (AA). In addition, Beighton generalised joint laxity tests were performed. All of the patients had shoulder pain and instability accompanied with hyperlaxity. We performed magnetic resonance imaging examination to show SLAP-Bankart lesions and pelvis anteroposterior X-rays to detect acetabular dysplasia. RESULTS: The average age of the study group was 26 ± 8.03 years (13-39). Six patients were female and 20 were male. When CEA (<22.6 degrees) was used as a criterion for acetabular dysplasia, the dysplasia rate of our patient group was 3.84 % for the right hip, 3.84 % for the left hip and 3.84 % overall. When AA (>42.2 degrees) was used as the dysplasia criterion, the dysplasia rate of patient group was 30.76 % for the right hip, 57.69 % for the left hip and 57.69 % overall. CONCLUSIONS: CEA values were significantly lower (p = 0.009) and AA values were significantly higher (p < 0.001) in our study group than the previously-reported average values of the Turkish population. We think that acetabular dysplasia is more frequent in patients with hyperlaxity; further studies are needed to test this idea.

The effect of infraspinatus hypotrophy and weakness on the arthroscopic treatment of spinoglenoid notch cyst associated with superior labrum anterior-to-posterior lesions.

PURPOSE: Patients with spinoglenoid notch cyst associated with superior labrum anterior-to-posterior (SLAP) lesions were evaluated. The patients were all treated by arthroscopic cyst decompression combined with SLAP repair. The hypothesis of the study was that the patients who underwent prolonged conservative treatment period prior to surgery would exhibit significant infraspinatus hypotrophy and weakness, and their postoperative clinical and functional outcomes would be less satisfactory. METHODS: Sixteen patients exhibited positive MRI and EMG findings with clinical signs of weakness and pain. The median age was 40.5 years (range 32-52), and the study group consisted of 11 males and 5 females with a median follow-up period of 26 months (12-48). The median duration of symptoms and conservative treatment prior to the surgical intervention was 3.5 months (1-14). Seven patients in group A exhibited infraspinatus hypotrophy. Group B comprised 9 patients without infraspinatus hypotrophy. RESULTS: The results of the pre- and postoperative Constant scores, visual analogue scale (VAS) scores, and external rotation strength test rates were compared between groups. They all improved in terms of pain, strength, and function (P < 0.05). Significant differences were observed between the pre- and postoperative external rotation strengths and Constant scores (P < 0.05). However, no significant difference was observed between the pre- and postoperative VAS scores (n.s.). A significant correlation was observed in group A between surgical timing, the preoperative external rotation strength ratio (P = 0.04) and the postoperative VAS scores (P = 0.013). CONCLUSION: The arthroscopic treatment was satisfactory with good clinical outcomes. Infraspinatus hypotrophy occurred in cases of prolonged surgical duration and significantly affected external rotation strength and functional outcomes. LEVEL OF EVIDENCE: Retrospective comparative study, Level III.

The olecranon osteotomy provides better outcome than the triceps-lifting approach for the treatment of distal humerus fractures.

INTRODUCTION: Intra-articular distal humeral fractures can be approached in a variety of ways. The purpose of this study is to evaluate and compare the functional outcomes of two approaches: approach with olecranon osteotomy and triceps-lifting approach for the treatment of intra-articular distal humeral fractures. METHODS: This study shows a consecutive series of 54 intra-articular distal humeral fractures of 54 patients who were treated with open reduction and internal fixation with anatomic plating. Lateral plating was performed in 10 (45.5 %) patients, and medial and lateral parallel plating was performed in 12 (54.5 %) patients in olecranon osteotomy group, while lateral plating was performed in 8 (25 %) patients, and medial and lateral parallel plating was performed in 24 (75 %) patients in triceps-lifting group. RESULTS: Mean follow-up was 38.3 months for olecranon osteotomy group and 41.4 months for triceps-lifting group. Functional outcomes according to MAYO elbow score and extension-flexion motion arc values were significantly better in olecranon osteotomy group (p < 0.05). CONCLUSION: Approach with olecranon osteotomy provided better functional outcomes than triceps-lifting approach. Additionally, intra-articular distal humerus fractures can be safely treated with olecranon osteotomy which provides more control over the elbow joint and better visualisation and allows early postoperative rehabilitation.

Distal femur morphology and the suitability of standard guides for knee arthroplasty in the Turkish population.

OBJECTIVE: The aim of this study was to evaluate the posterior condylar angle (PCA) and condylar twist angle (CTA) of the distal femur in the Turkish population and its concordance with the current standard prosthesis guides used in total knee arthroplasty (TKA). METHODS: Two hundred and forty knees of 120 Turkish subjects (60 male and 60 female) were included in this study. PCA, CTA, femoral mediolateral lengths (fML), medial femoral anteroposterior lengths (fMAP), lateral femoral anteroposterior lengths (fLAP), distances between the trochlear groove and fMAP (DBTG-fMAP), distances between the trochlear groove and fLAP (DBTG-fLAP), medial posterior condylar cartilage thickness (MPCCT) and lateral posterior condylar cartilage thicknesses (LPCCT) were measured on magnetic resonance imaging (MRI). RESULTS: The median CTA was 7° (range: 0°-13.0°) and the median PCA was 4° (range 0°-11.0°) (P < .0001). The median fML was 79.5 mm (range: 65.7-98.9). The median length of the fMAP was 58.2 mm (range: 46.8-69.0) and the median length of fLAP was 58.2 mm (range: 48.4-73.0). The DBTG-fMAP was 15.2 mm (range: 5.2-23.2), and DBTG-fLAP length was 21.9mm (range: 16.4-29.4). The median MPCCT and LPCCT were 2.4 mm (range: 1.6-3.6) and 2.3 mm (range: 1.2-2.8), respectively. The intraclass correlation coefficient for quantifying interobserver and intraobserver reliability showed excellent agreement regarding the PCA and CTA. CONCLUSION: This study has shown us that PCA and CTA may be higher in the Turkish population. Although it is not known whether these results have any clinical utility, it may be useful for surgeons to keep this in mind to prevent femoral component malposition. LEVEL OF EVIDENCE: Level IV, Diagnostic Study.

Does obesity negatively affect the functional results of arthroscopic partial meniscectomy? A retrospective cohort study.

PURPOSE: The purpose of this study was to evaluate the impact of body mass index (BMI) on early functional results of patients who undergo isolated partial meniscectomy. METHODS: The functional results for 1,090 patients who underwent partial meniscectomy, in 2 different orthopaedic clinics, were evaluated retrospectively. The study includes cases with arthroscopic partial meniscectomy for isolated meniscal tears; patients with concomitant knee pathology were excluded. Three hundred forty-one (31%) patients with isolated lateral meniscal tears, 628 (58%) patients with isolated medial meniscal tears, and 121 (11%) patients with both medial and lateral meniscal tears underwent arthroscopic partial meniscectomy. We divided these patients into 3 subgroups on the basis of their BMI; <26, between 26 and 30, ≥30. Preoperative functional results were compared with 1-year postoperative follow-up results using the International Knee Documentation Committee (IKDC),(26) Lysholm Knee Scale,(27) and Oxford Scoring System(28) scores. RESULTS: According to all 3 knee scales, age, side of lesion, and tear type had no effect on functional outcome. When compared with the group with BMI <26, the patients with BMI between 26 and 30 and the patients with BMI ≥30 had significantly worse outcomes as measured by the IKDC, Oxford Scoring System, and Lysholm Knee Scale scores. Patients with BMI between 26 and 30 and ≥30 did not have significantly different functional outcomes. CONCLUSIONS: Short-term outcomes after arthroscopic partial menisectomy reflect significant improvement in subjective outcome. However, patients with moderate or significant obesity (BMI >26) have inferior short-term outcomes compared with nonobese patients. LEVEL OF EVIDENCE: Level IV, therapeutic case series.