Bohler angle
Original Editor - Elien Vanderlinden
Top Contributors - Angeliki Chorti, Elien Vanderlinden, Kim Jackson and Claire KnottDescription
The Böhler (or Bohler, Boehler) angle, is also found as the calcaneal angle or tuber joint angle. [1] It is considered in the assessment of displaced intra-articular calcaneal fractures. The Böhler angle is named after Lorenz Böhler (1885-1973), an Austrian surgeon, who is also known as the founder of traumatology. [2]
Intended Use
With calcaneal fractures, this angle may become smaller, straighter, and can even reverse. The degree of reduction in the Böhler angle reflects the severity of a calcaneal fracture, and the degree to which the Böhler angle is restored at surgery is connected to functional outcomes. [3]
Measurement
This is an angle seen on a lateral foot radiograph. Measurement is taken between the highest point of the anterior process of the calcaneus and the highest point of the posterior articular facet (line 1), and the highest point of the posterior articular facet with the highest point of the calcaneal tuberosity (line 2). [4]
Interpretation
The Böhler angle is normally between 25° and 40°. However, mildly decreased Böhler angles have been reported in normal individuals and a normal Böhler angle does not exclude a non-displaced calcaneal fracture. [5] Despite variations between individuals, the angles on left and right feet of a single individual do not seem to show any differences. [1]
Resources
Grala P, Machyñska-Buæko Z, Kierzynka G. Surgical treatment of articular calcaneal fractures. Ortop Traumatol Rehabil. 2007; 9(1): 89-97.
Seyahi A, Serkan Uludag S, Koyuncu LO, Atalar AC, Demirhan M. The calcaneal angles in the Turkish population. Acta Orthop Traumatol Turc. 2009;43(5):406-11.
References
- ↑ 1.0 1.1 Amini B, Worsley C, Weerakkody Y, Knipe H, Al Kabbani A, Bell D, et al. Böhler angle. Reference article, Radiopaedia.org. Available from: https://doi.org/10.53347/rID-1002 [accessed 12-7-2024]
- ↑ Bohler J. Lorenz Böhler: in memoriam. J Trauma. 1973 Jul;13(7):658-9.
- ↑ Su Y, Chen W, Zhang T, Wu X, Wu Z, Zhang Y. Bohler's angle's role in assessing the injury severity and functional outcome of internal fixation for displaced intra-articular calcaneal fractures: a retrospective study. BMC Surg. 2013 Sep 24;13:40.
- ↑ Lau BC, Allahabadi S, Palanca A, Oji DE. Understanding Radiographic Measurements Used in Foot and Ankle Surgery. J Am Acad Orthop Surg. 2022 Jan 15;30(2):e139-e154.
- ↑ Sengodan V, Amruth K, Karthikeyan. Bohler's and Gissane Angles in the Indian Population. J Clin Imaging Sci. 2012;2:77.