Bohler's Angle and Critical Angle of Gissane: Morphometry in Adult Indian Population

Abstract

ABSTRACT Introduction For the quantification of intra-articular fracture of the calcaneus, different types of angles have been mentioned in the literature. Of these, the Bohler's angle (BA) and the critical angle of Gissane (CAG) are used in common practice. However, there is a great paucity of literature conducted on the Indian populace to find out the normal range of BA and CAG. In this article, our objective is to homologate and confirm the normal range of BA and the CAG in the Indian population and compare their values to the published international reference values. Materials and methods It is an observational cross-sectional study done between 2017 and 2019. X-rays were anonymized by hiding the identification data. The BA and CAG were measured together and by two authors simultaneously. Each angle was measured two times. Two-sample T-test was chosen to compare the means of the values and the p value <0.05 was considered significant. Results Three hundred and eighty-four (n = 384) X-rays were studied. The average age of the patients was 41.73 years. The mean (°) of BA was 33.53 ± (SD) 6.78 (max = 46.35, min = 16.23) and the mean (°) of CAG was 115.90 ± (SD) 11.00 (max = 142.88, min = 90.22). Conclusion The distinct apprehension of the normal dispersion of Bohler's angle and the CAG is utmost needed for the clinical practice in a population (racial) group. So, it is praiseworthy to conduct a multicenter study over a large Indian population (considering racial variation) with inter and intra-rater reliability. How to cite this article Mishra PK, Pathak S, Tenguria A. Bohler's Angle and Critical Angle of Gissane: Morphometry in Adult Indian Population. J Foot Ankle Surg (Asia Pacific) 2021;8(2):72–75.