The calcaneus is the most commonly fractured tarsal bone, notwithstanding the fact that the fractures of the tarsus are relatively infrequent [1]. In 1931, Boehler [2] first described the tuber-joint ankle to estimate the degree of displacement. The purpose of our study was to determine the physiological range of the Boehler’s angle of the uninjured calcanei in the adult Croatian Caucasian population and evaluate its correlation with age, sex and laterality as well as to analyze the interrater reliability.

The Boehler’s angle was measured by three independent raters on 130 consecutive lateral digital radiographs of the uninjured calcanei in the adult Croatian Caucasian population (30–69 years) (Fig 1). The angle was formed by two lines connecting the apices of the anterior calcaneal process and the posterior calcaneal facet and the apices of the posterior calcaneal facet and the posterior calcaneal tuberosity (Fig 2). The enthesopathy of the Achilles tendon and the plantar aponeurosis, the calcaneal spur and the supramalleolar fracture of the fibula along...

The overall mean value of the Boehler’s angle of the uninjured calcanei in the adult Croatian Caucasian population was 33.73°±5.17° (20.9°–46.3°) (Fig 3). The value of the Boehler’s angle was independent of sex (rpb= -.08, P=.344) and laterality (rpb=.04, P=.618), yet negatively, though poorly correlated with age (rp=-.19, r2=.036=3.6 %, P=.033) (Fig 4). The interrater reliability was excellent (ICC=0.938, 95%CI=0.918–0.954).

Discussion Our study has shown that the value of the Boehler’s angle in the adult uninjured Croatian Caucasian population was not significantly related to sex and laterality, whereas the poor correlation with age was, indeed, statistically significant, yet clinically irrelevant. The most common causes of the calcaneal bone injury are the fall from height and the axial loading [3]. The radiographic calcaneal angles exhibit a wide range of physiological limits and distributions with regard to different populations. As an accepted method of fracture displacement evaluation,...

Marko Šimunović1, Dinko Nizić2, Kristina Potočki1, Marko Radoš1 , 1Clinical institute of diagnostic and interventional radiology, Zagreb University hospital center, Kišpatićeva 12, 10000, Zagreb, Croatia, 2Special hospital for pulmonary diseases, Rockefellerova 3, 10000 Zagreb, Croatia [email protected]

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