Ridge preservation is a surgical procedure performed at or shortly after tooth extraction to maintain the architecture of the alveolar ridge and minimize the bone resorption that naturally follows tooth loss. By placing bone graft material — and often a collagen membrane — into the extraction socket, the procedure protects the height and width of the jawbone required for future restorative work.
Why It Matters
After a tooth is removed, the surrounding alveolar bone begins to resorb rapidly. Research indicates that up to 50% of ridge volume can be lost within the first year, with the most significant dimensional changes occurring in the first three to six months. This bone loss can compromise the placement of dental implants, affect the stability of removable prostheses, and alter facial contours over time. Ridge preservation substantially reduces this resorption, creating a more predictable site for subsequent treatment.
How the Procedure Works
Following atraumatic extraction, the socket is thoroughly debrided and a bone grafting material is placed to fill the void. Common graft options include:
- Autografts — bone harvested from the patient’s own body, offering the highest osteogenic potential
- Allografts — processed donor bone, widely used for its availability and clinical predictability
- Xenografts — bovine or porcine-derived bone mineral, valued for its slow resorption rate
- Alloplastic materials — synthetic substitutes such as hydroxyapatite or beta-tricalcium phosphate
A resorbable or non-resorbable membrane is often placed over the graft to exclude soft tissue ingrowth and support guided bone regeneration. The site is then sutured closed, and healing progresses over three to six months before implant placement is considered.
Clinical Considerations
Proper case selection and technique directly influence outcomes. The condition of the extraction socket, presence of infection, and the patient’s systemic health all affect graft integration. The procedure is most predictable when performed at the time of extraction rather than as a delayed intervention. Clinicians must also account for adjacent structures — including remnants of the periodontal ligament and the integrity of the cortical bone walls — which influence vascularization and long-term graft stability.
When implant-supported restoration is part of the treatment plan, ridge preservation is one of the most cost-effective steps a patient can take, significantly reducing the need for more complex augmentation procedures down the line.