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Effect of J-Shaped Incision After Total Knee Arthroplasty (J-TKA)

NCT07514598 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 62

Last updated 2026-05-29

No results posted yet for this study

Summary

This prospective randomized controlled trial evaluates whether a modified J-shaped skin incision can reduce peri-incisional numbness after primary total knee arthroplasty (TKA) compared with the conventional midline skin incision. Peri-incisional numbness is a common postoperative complaint after TKA and is thought to be mainly related to injury of the infrapatellar branch of the saphenous nerve. Although often considered a minor issue, it may adversely affect postoperative comfort, pain perception, and patient satisfaction.

A total of 62 patients undergoing primary TKA for Kellgren-Lawrence grade 4 varus knee osteoarthritis were randomized to either a conventional midline incision or a modified J-shaped incision. In the J-shaped technique, the distal part of the incision is curved laterally at the level of the tibial tuberosity in an effort to decrease injury to the infrapatellar branch of the saphenous nerve. The primary outcome is the extent of peri-incisional sensory loss, assessed using Semmes-Weinstein 10-g monofilament testing with a grid-mapping method before surgery and at 2 and 6 months after surgery. Secondary outcomes include pain scores, functional knee scores, range of motion, blood loss, tourniquet time, and wound-related complications.

Conditions

  • Osteoarthritis, Knee

Interventions

PROCEDURE

Conventional Midline Incision

A conventional midline skin incision is used during primary total knee arthroplasty.

PROCEDURE

J-shaped Incision

A modified J-shaped skin incision is used during primary total knee arthroplasty, in which the distal portion of the incision is curved laterally at the level of the tibial tuberosity.

Sponsors & Collaborators

  • Fatih Sultan Mehmet Training and Research Hospital

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
56 Years
Max Age
81 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-09-17
Primary Completion
2026-04-17
Completion
2026-05-17

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07514598 on ClinicalTrials.gov