The Normal Value of Tibial Tubercle Trochlear Groove Distance in Patients with Normal Knee Examinations Using MRI

AUTHORS

Reza Nafisi Moghadam 1 , Zoheira Arefmanesh 2 , *

1 Yazd University of Medical Sciences, Yazd, Iran

2 Resident

How to Cite: Nafisi Moghadam R, Arefmanesh Z. The Normal Value of Tibial Tubercle Trochlear Groove Distance in Patients with Normal Knee Examinations Using MRI, Iran J Radiol. Online ahead of Print ; 14(Special Issue):e48000. doi: 10.5812/iranjradiol.48000.

ARTICLE INFORMATION

Iranian Journal of Radiology: 14 (Special Issue); e48000
Published Online: April 12, 2017
Article Type: Abstract
Received: December 20, 2016
Accepted: February 7, 2017
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Abstract

Abstract: Patellar instability is a multifactorial common knee pathology that has a high recurrence rate, and the symptoms continue and ultimately predispose the patient to chondromalacia and osteoarthritis. Tibial tuberosity-trochlear groove distance (TTTG) is very important in the assessment of patellofemoral joint instability. The purpose of this study was to report normal value of TTTG in males and females in different age groups and to assess the reliability of MRI in measuring TTTG. All patients presenting with knee pain and normal examinations of knee joint, with a normal MRI report, referring to ShahidSadoughi hospital of Yazd, Iran, from April 2014 to September 2014, were included into the study. MR images were studied once by two radiologists and for the second time by one radiologist. Mean value of TTTG was reported for males and females and in three age groups. Intra- and inter-observer reliability was calculated. A total of 98 patients were eligible to evaluate during 6 months (68 male and 30 female). Mean TTTG was 10.9 2.5 mm in total, which was 10.8 2.8 mm and 11.3 2.3 mm in males and females, respectively (P > 0.05). Mean TTTG in males ? 30 years, 30-50 years and, ? 51 years old were 10.8 2.6 mm, 10.8 2.7 mm, and 10.8 2.6 mm, respectively; that was 12.1 3.4 mm, 11.4 1.9 mm, and 10.5 1.7 mm in females ? 30 years, 31 - 50 years and, ? 51 years old, respectively (95 % CI). The coefficient of variation was < 10% for both intra- and inter-observer analysis. The results of the present study showed no significant difference in TTTG value between males and females in different age groups. In addition, it demonstrated that MRI is a reliable method in assessment of TTTG and identified normal value for TTTG at 10.9 2.5 mm.

Keywords

Knee Anatomy Magnetic Resonance Imaging TTTG

© 2017, Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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