The influence of joint line position on functional outcome in primary total knee arthroplasty

Authors

  • Nikhil Gupta Department of Orthopedics, Ruby Hall Clinic, Pune, Maharashtra, India
  • Rajesh Singh Department of Orthopedics, Ruby Hall Clinic, Pune, Maharashtra, India
  • Akash Saxena Department of Orthopedics, Ruby Hall Clinic, Pune, Maharashtra, India

DOI:

https://doi.org/10.18203/issn.2455-4510.IntJResOrthop20211605

Keywords:

Arthroplasty, Joint line, Functional outcome

Abstract

Background: To find out the cut off for position of joint line which will provide a good functional outcome.

Methods: 58 patients underwent total knee arthroplasty using standard medial parapatellar approach were included in this study. Pre-operative and post-operative radiological joint line were assessed. Pre-operative and post-operative functional assessment were done using oxford knee score and International knee society score. functional outcome was assessed at 1, 3 and 6 months. Influence of post-operative joint line change on functional outcome was assessed on follow up visit in 6th month.

Results: Of 58 patients studied, mean age ± SD was 69.0±7.5 years. Joint line elevation of 36, 16, 8 and 2 patients were between 0-2, 2-4 4-8 and>8 mm respectively with mean ± SD of joint line elevation of 2.24±2.07 mm in the group. Mean OKS-knee score at 6 months follow-up of study group was 36.60 with mean IKSS-knee score of 38.17 at 6 months follow up of group<4 mm which was significant (p<0.05) when compared to mean IKSS-knee score at 6 months follow up of group>4 mm (28.40).

Conclusions: It was concluded that joint line restoration is necessary for getting a good functional outcome after primary total knee arthroplasty. The functional outcome of patients with joint line elevation between 4-8mm showed inferior outcomes in comparison to the patients with joint line elevation within 4 mm.

Author Biographies

Nikhil Gupta, Department of Orthopedics, Ruby Hall Clinic, Pune, Maharashtra, India

SENIOR RESIDENT, DEPTT OF ORTHOPAEDICS, SANJAY GANDHI MEMORIAL HOSPITAL, MANGOLPURI ,DELHI- 110083

Ex- Junior Resident(DNB Resident) , Deptt. of Orthopaedics, Ruby Hall Clinic, Bund Garden, Pune, Maharashtra.

Rajesh Singh, Department of Orthopedics, Ruby Hall Clinic, Pune, Maharashtra, India

Senior resident, Deptt. of Orthopaedics, Gaja Raja Medical College, Gwalior, Madhya Pradesh

Akash Saxena, Department of Orthopedics, Ruby Hall Clinic, Pune, Maharashtra, India

Ex. Junior resident (DNB Resident), Ruby Hall Clinic, Bund Garden, Pune

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Published

2021-04-26

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Original Research Articles