Botbreedte

Botbreedte is an anatomical term used to describe the transverse width of a bone at a given cross section. It can refer to the distance from one outer cortex to the opposite outer cortex (outer diameter) or, less commonly, the distance between the inner surfaces of the cortex (endosteal or inner diameter). The concept is part of bone geometry, which, alongside bone density, helps describe the structural properties of a bone.

Originating from Dutch, bot means bone and breedte means width, and the term is used in disciplines such as anatomy, radiology, orthopedics, and biomechanics. Botbreedte measurements contribute to understanding how bone shape influences strength and fracture risk, as geometry affects how bones bear loads and resist bending.

Measurement methods and applications: Botbreedte is typically measured on imaging studies. X-ray radiographs provide a projection-based estimate that requires correction for magnification and alignment. Computed tomography (CT) offers precise cross-sectional dimensions and enables three-dimensional reconstruction, while magnetic resonance imaging (MRI) can also be used in certain contexts. In research and clinical settings, botbreedte data support analyses of bone geometry, implant design, growth assessment in pediatrics, and comparative anatomy or forensic investigations.

Biological variation and limitations: Botbreedte varies by bone and location (diaphysis versus metaphysis), as well as by age, sex, and population. Aging can modify bone geometry through periosteal apposition or cortical thinning, influencing width measurements and mechanical strength. Imaging modality, patient positioning, and measurement protocol can affect values, so population- and bone-specific reference ranges are commonly used.

See also: bone geometry, cortical thickness, cross-sectional area.

---