Characteristics of Patellofemoral Measurement in Indonesian Population Using Magnetic Resonance Imaging

Abstract

BACKGROUND: The patellofemoral join is a unique complex joint formed by articulation of the patella and the femoral trochlea. Normal measures for patellofemoral parameters have been published.
 AIM: This study aimed to describe the characteristics of patellofemoral measurements in Indonesian population using magnetic resonance imaging (MRI).
 METHODS: This descriptive total sampling study was conducted from May 2019 to August 2020. The parameters of the measurements in this study include Insall-Salvati ratio, Caton-Deschamps index, trochlear angle, lateral trochlear inclination, TT (tibia tubercle) – TG (trochlear groove) distance, and trochlear depth. The mean results of the measurements were compared with the normal value measurements that are internationally used.
 RESULTS: A total of 100 normal knees MRI scan from patients consisting of 54 (54%) males and 46 (46%) females, with an average age of 35.09 ± 12.77 (19–60) years old. The average body mass index (BMI) was 28.07 ± 3.0 (22–34). Based on ethnicity, subjects were mostly Javanese (66%), Sundanese (12%), Madura (4%), Minangkabau (7%), and the others (11%). The mean of Insall-Salvati ratio was 1.09 ± 0.17 (0.49–1.60). The mean of Caton-Deschamps index was 0.97 ± 0.16 (0.62–1.64). The mean of trochlear angle was 138.97° ± 119.7 (122°–160°). The mean of lateral trochlear inclination was 20.37° ± 4.56 (11.0°–30.6°). The mean of TT-TG distance was 13.76 ± 5.86 (4.9–41), and the mean of trochlear depth was 5.18 ± 1.87 (1.05–8.6). Those values were within normal range of international values. There were no significant differences between comparison of males and females.
 CONCLUSION: The means of Insall-Salvati ratio, Caton-Deschamps index, trochlear angle, lateral trochlear inclination, and TT-TG trochlear depth of the Indonesian people were within the international normal range, and higher than other countries’ published measurements.

Patellar height measurement in Indonesian normal adult population

“…This finding is similar to the results of a study by Rhatomy et al (2021), who found no significant difference in patellar height between men and women using the Insall-Salvati and Caton-Deschamps methods. However, Hong et al (2020) found a significant difference in patellar height between men and women using the Insall-Salvati method [ 11 , 15 ].…”

“…In Indonesia, research on patellar height measurement has been carried out. This study describes the characteristics of patellar height measurement with MRI modality [ 15 ].…”