Bone resorption is the physiological — and often pathological — process by which osteoclast cells break down mineralized bone tissue, reducing both the density and volume of the alveolar bone that supports teeth. In dentistry, this loss of bony structure is a central concern because the alveolar bone provides the foundation that anchors teeth through the periodontal ligament and determines the long-term viability of both natural teeth and implant-based restorations.

Common Causes

Bone resorption can be triggered by a range of local and systemic factors:

• Periodontal disease: Bacterial biofilm and the resulting chronic inflammatory response are the most prevalent drivers of alveolar bone loss, often advancing silently until significant damage has occurred.
• Tooth loss: After extraction, the absence of functional loading causes surrounding bone to remodel and diminish — a process called disuse atrophy — which can compromise future restorative options.
• Occlusal trauma: Excessive or poorly distributed biting forces can overload the periodontal ligament and initiate localized resorptive changes at the crestal bone.
• Systemic conditions: Osteoporosis, diabetes, and medications such as corticosteroids reduce bone mineral density and heighten susceptibility to accelerated loss.
• Orthodontic movement: Controlled, intentional resorption on the pressure side of a tooth is a normal and expected part of orthodontic treatment.

Clinical Significance and Management

Clinicians detect and monitor bone resorption primarily through periapical and panoramic radiographs, measuring crestal bone height relative to the cementoenamel junction (CEJ). Cone-beam computed tomography (CBCT) adds three-dimensional precision when surgical planning or implant placement is involved. Serial radiographs taken over time remain the standard for tracking disease progression.

Management depends on the underlying cause. Treating periodontal disease through scaling, root planing, and surgical debridement can halt further loss and, in some cases, permit partial regeneration. When bone volume is insufficient for implant placement, grafting procedures — using autogenous bone, allograft, or synthetic substitutes — aim to restore the ridge prior to surgery. Successful osseointegration of a dental implant depends directly on the quantity and quality of the remaining bone at the recipient site.

Early identification of bone resorption substantially improves treatment outcomes, making routine radiographic monitoring and periodontal assessment essential components of preventive dental care.