Showing papers by "Gautam M. Shetty published in 2017"

Mobile-bearing medial unicompartmental knee arthroplasty restores limb alignment comparable to that of the unaffected contralateral limb.

Abstract: Background and purpose — Medial unicompartmental knee arthroplasty (UKA) is undertaken in patients with a passively correctable varus deformity We investigated whether restoration of natural soft

A Combined Closing Wedge Distal Femoral Osteotomy and Medial Reefing Procedure for Recurrent Patellar Dislocation with Genu Valgum.

Abstract: PURPOSE Recurrent patellar dislocation is often associated with genu valgum The purpose of this study was to analyze the short-term results of single-incision, closing-wedge distal femoral osteotomy (CWDFO) combined with medial reefing and lateral release for recurrent patellar instability with genu valgum MATERIALS AND METHODS Combined CWDFO/medial reefing/lateral release was performed on 10 knees Clinical evaluation was based on pre- and postoperative Knee Society Score (KSS) and Kujala patellofemoral score Radiographic evaluation was performed with reference to the weight-bearing line (WBL), the femorotibial angle (FTA), and the mechanical lateral distal femoral angles in the knee-standing view RESULTS At a mean follow-up of 20±117 months (range, 12-42 months), KSS scores improved significantly, from 467±52 preoperatively to 87±44 postoperatively (p<0001), as did the Kujala score, from 44±8 preoperatively to 866±68 postoperatively (p<0001) The WBL decreased significantly, from 76±7% preoperatively to 41±11% postoperatively (p<0001) The FTA was improved significantly, from 127±17° preoperatively to 4±4° postoperatively (p<0001), as was the mLDFA, from 83±4° preoperatively to 91±13° postoperatively (p<0001) CONCLUSION Use of single-incision CWDFO combined with medial reefing and lateral release prevents patellar dislocation, corrects deformity, and improves clinical outcomes

The Effect of Sagittal Knee Deformity on Preoperative Measurement of Coronal Mechanical Alignment during Total Knee Arthroplasty

Abstract: The purpose of this prospective study was to determine correlation between coronal mechanical alignment measured on preoperative standing full-length radiographs and navigation during total knee arthroplasty (TKA) in the presence of an associated sagittal deformity (hyperextension and flexion deformity)Coronal mechanical alignment measured on preoperative, standing, full-length, hip-to-ankle anteroposterior radiographs was compared with intraoperative measurements recorded with computer navigation in 200 primary navigated TKAsThe mean difference in mechanical alignment between the two techniques was significantly greater (p=0001) in patients with an associated flexion deformity >10° when compared to knees with associated flexion deformity ≤10°; 48% of knees with a flexion deformity >10° had a difference of ≥3° between the full-length radiograph and navigation alignment measurements There was a strong correlation between the radiographic and navigation measurement techniquesThe mean difference in coronal mechanical alignment between the two techniques was significantly higher in patients with an associated flexion deformity >10° Hence, surgeons should take caution when relying on preoperative full-length radiographs for determining coronal mechanical alignment in patients with an associated flexion deformity >10° where using navigation may be more reliable

Open-wedge high tibial osteotomy versus unicompartmental knee arthroplasty: no difference in progression of patellofemoral joint arthritis.

Abstract: Purpose The purpose of this retrospective comparative study was to evaluate and compare, radiographically and clinically, progression of osteoarthritis (OA) in the patellofemoral (PF) compartment after open-wedge high tibial osteotomy (OWHTO), and unicompartmental knee arthroplasty (UKA) over a minimum follow-up of 5 years.

Windswept deformities - An indication to individualise valgus correction angle during total knee arthroplasty.

Abstract: Purpose We aimed to determine variation in femoral valgus correction angle (VCA) between the two limbs in a patient with windswept deformity undergoing total knee arthroplasty (TKA) Methods Femoral VCA was measured on full-length, hip-to-ankle, standing radiographs and was compared between the varus and the valgus limbs in 66 patients with windswept deformities Results The mean VCA in varus knees was significantly higher compared to mean VCA in valgus knees (p = 0002) Conclusion Significant difference in VCA is present between the varus and the valgus limbs in most patients with windswept deformity undergoing TKA

Efficacy of a novel iPod-based navigation system compared to traditional navigation system in total knee arthroplasty

Abstract: Background: This prospective study aimed to verify the efficacy of a novel, hand-held, iPod-based navigation system in comparison to traditional navigation system for total knee arthroplasty (TKA).Methods: Limb alignment, tibial and distal femoral bone cut thickness and plane were recorded intraoperatively using both iPod-based and traditional navigation system in 36 knees undergoing primary TKAs.Results: Intraoperatively, the iPod-based navigation system showed good to excellent correlation and reliability for tibial and distal femoral bone cut thickness, plane of the femoral cut and limb alignment when compared to the traditional navigation system.Conclusions: Despite its quick registration feature, the iPod-based system has an efficacy similar to traditional navigation system and is a positive step towards making navigation systems for TKA more compact, user-friendly, time and cost-effective.