The Archives of Bone and Joint Surgery

The Archives of Bone and Joint Surgery

Position of the Patella among Emirati Adult Knees. Is Insall-Salvati Ratio Applicable to Middle-Easterners?

Document Type : RESEARCH PAPER

Authors
Saeed Althani 1
Alisina Shahi 2
Timothy Tan 2
Ali Al-Belooshi 1
1 Department of Surgery, United Arab Emirates University, Al Ain, UAE
2 Rothman Institute at Thomas Jefferson University, Philadelphia, PA, USA
10.22038/abjs.2016.5477
Abstract
 
 
Background: Abnormal patellar height is associated with anterior knee pain and several conditions that affect the patellofemoral joint. The aim of this study was to 1) report the incidence of patella alta and patella baja and 2) investigate whether the normal limits of the Insall-Salvati ratio is applicable in adult Middle-Easterners.
Methods: A radiographic review of the lateral radiographs of 736 Middle-Eastern knees were performed. Patellar tendon length (TL) and the patellar length (TP) was digitally measured and the ratios of these measures was used to calculate the Insall-Salvati ratio.
Results: The overall mean TL/PL ratio was 1.20±0.17. The Insall-Salvati ratio was higher (p=0.0013) in males (1.22± 0.12) than in females (1.18±0.17). According to our measurement, the recommended levels for defining abnormal patellar position should be 0.86 for patella baja and 1.54 for patella alta.
Conclusion: The use of TL/PL ratio demonstrated a higher incidence of patella alta and a higher mean TL/PL ratio compared to other techniques. The normal ranges for the TL/PL differs from western populations and may be attributed to lifestyle differences.
 
 
 
Keywords
Insall-Salvati ratio
Middle-Easterner
Patellar position
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The Archives of Bone and Joint Surgery
Volume 4, Issue 2 - Serial Number 2
April 2016
Pages 137-140

  • Receive Date 31 December 2014
  • Revise Date 15 October 2015
  • Accept Date 02 November 2015