Where is the MOST probable place of bone resorption after a deciduous molar has pulpal gangrene?

The most probable place of bone resorption after a deciduous molar has pulpal gangrene is typically in the interradicular septum. This area is located between the roots of multi-rooted teeth and plays a critical role in supporting the tooth structure. When pulpal gangrene occurs, it often leads to infection and inflammation that can extend to surrounding tissues, including the bone.

The interradicular septum is particularly vulnerable due to its close proximity to the pulp of the infected tooth. The bacterial infection and associated inflammatory response can result in osteoclastic activity, leading to the resorption of bone within this septal area. Bone loss here can compromise the stability of the tooth and potentially lead to further complications, such as tooth mobility or loss.

While the periapical area can also experience bone resorption due to infection, the interradicular septum is more directly impacted in cases of pulpal gangrene, especially in deciduous teeth where the roots are still developing. The periodontal ligament space and crest of the alveolar ridge do not specifically correlate to the resorption patterns observed with pulpal gangrene as noted in the interradicular region.