Estimation of adductor ratio in the Indian population: Is it a reliable indicator for recreating joint line of the knee?

Q2 Medicine

Journal of Clinical Orthopaedics and Trauma Pub Date : 2025-03-07 DOI:10.1016/j.jcot.2025.102970

Yuvarajan Palanisamy, Abhijit Jawali, Arjun R. Prasad, David V. Rajan

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引用次数: 0

Abstract

Background

Accurate restoration of the joint line is critical in revision total knee arthroplasty (r-TKA) to ensure proper ligament tension and optimize functional outcomes.

Objective

To determine the adductor ratio in the Indian population and assess its reliability for restoring the joint line in primary total knee arthroplasty (TKA).

Methods

The study consisted of two parts. In the first part, 93 young, non-arthritic individuals were evaluated radiologically to estimate the adductor ratio. In the second part, 47 patients with grade IV osteoarthritis undergoing primary TKA were included. Pre-operative radiographic and intraoperative calliper measurements of the adductor tubercle to joint line distance (ATJL) and femoral width (FW) were taken. Pearson correlation was estimated between FW and ATJL, and Bland-Altman analysis was used to assess the agreement between pre-operative and intra-operative measurements. The error in using a standard adductor ratio was estimated.

Results

The mean adductor ratio in the non-arthritic population was 0.542, with a strong correlation between ATJL and FW (r = 0.81, p < 0.001). In the second part, the mean adductor ratio was consistent pre-operatively (0.53) and intra-operatively (0.54), with a bias of 0.001 and 95 % limits of agreement from −0.062 to 0.065. The estimated ATJL was within 5 mm of the actual measurement in 95 % of cases.

Conclusion

The adductor ratio of 0.54 is a reliable indicator for joint line restoration in the Indian population. Documentation of ATJL and FW during primary TKA is recommended for enhancing accuracy in joint line reconstruction in revision scenarios.

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来源期刊

Journal of Clinical Orthopaedics and Trauma Medicine-Orthopedics and Sports Medicine

CiteScore

4.30

自引率

0.00%

发文量

181

审稿时长

92 days

期刊介绍： Journal of Clinical Orthopaedics and Trauma (JCOT) aims to provide its readers with the latest clinical and basic research, and informed opinions that shape today''s orthopedic practice, thereby providing an opportunity to practice evidence-based medicine. With contributions from leading clinicians and researchers around the world, we aim to be the premier journal providing an international perspective advancing knowledge of the musculoskeletal system. JCOT publishes content of value to both general orthopedic practitioners and specialists on all aspects of musculoskeletal research, diagnoses, and treatment. We accept following types of articles: • Original articles focusing on current clinical issues. • Review articles with learning value for professionals as well as students. • Research articles providing the latest in basic biological or engineering research on musculoskeletal diseases. • Regular columns by experts discussing issues affecting the field of orthopedics. • "Symposia" devoted to a single topic offering the general reader an overview of a field, but providing the specialist current in-depth information. • Video of any orthopedic surgery which is innovative and adds to present concepts. • Articles emphasizing or demonstrating a new clinical sign in the art of patient examination is also considered for publication. Contributions from anywhere in the world are welcome and considered on their merits.