Bundle bone (also known as alveolar bone proper) is a histologic term for the portion of the bone of the alveolar process that surrounds teeth and into which the collagen fibers of the periodontal ligament are embedded.^[1] It can also be referred to as alveolar bone proper.

Bundle bone is functionally dependent in that it resorbs following tooth extraction or loss.^[1]

Bundle bone is very flexible and constantly remodels to accommodate the changing shape and size of the dental structures it contains. Bundle bone can be divided into two main parts: a thin layer of compact (radiodense) bone (the ‘cortex’ of alveolus) that lines the alveolus proper, in which Sharpey's fibers insert, that is radiographically termed the lamina dura (lamina dura denta).^{[citation needed]}