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Corresponding Author: Dr. Humaira Zainab, M.D Anatomy, Assistant Professor, Department of Anatomy, Khaja Banda Nawaz Institute of Medical Sciences, Faculty of Medicine, Khaja Banda Nawaz University, Kalaburgi, Karnataka, India. E-Mail: zainabhumaira@gmail.com Background: Calcaneus is the largest and strongest of tarsal bones of the foot and presents six surfaces out of which, superior surface shows 3 facets for articulation with the talus namely anterior, middle and posterior talar facets. Anterior two thirds of the calcaneus’s superior surface articulates with the talus. Alignment of these two bones i.e calcaneus and talus is responsible to maintain the arches of foot and also formation of subtalar joint takes place thus alignment is equally important to maintain joint stability. Objective: Aim of the present work is to study different patterns of talar articular facets on the calcaneum in order to know degree of separation of facets on anterior third of the calcaneum i.e., between anterior and middle articular facet and to correlate findings of the present study with other authors study. Material and methods: The pattern of talar articular facets with reference to their interfacet distance was studied in 150 dry adult human calcanei of unknown sex and age obtained from H.K.E region in the year 20172019. The data was statistically analysed. Results: In Type I, IA was found with a higher percentage (40%) in comparison to IB. In type II, subtype II A was found with highest percentage (14%) and subtype II C was with least percentage ( 0.66%). Out of 110 calcanei in type I, subtype IA were 60 (54.5%) and subtype IB were 50 (45.4%) . In type II out of 35 calcanei, subtype IIA was found with higher percentage of 60% (21),subtype IIB was found in 37.1%(13)and subtype IIC was found with least percentage of about 2.85%(1). Conclusion: Calcaneal morphology is of clinical significance so as to maintain normal function of the hind foot, stress conduction for weight bearing and joint mobility. During calcaneal osteotomy, care is taken not to damage middle articular facet.So this facetal study is helpful for treatment and surgical point of view.

DEGREE OF SEPARATION BETWEEN ARTICULAR FACETS (ANTERIOR AND MIDDLE) ON ANTERIOR THIRD OF SUPERIOR SURFACE OF THE CALCANEUM IN H.K.E REGION