Alveolar ridge augmentation using nonresorbable hydroxylapatite with or without autogenous cancellous bone.

Area of Science:

• Oral and Maxillofacial Surgery
• Biomaterials Science
• Dental Implantology

Background:

• Alveolar ridge deficiency presents challenges for denture stability and implant placement.
• Traditional bone grafting methods (rib, iliac crest) can lead to significant resorption and morbidity.
• A need exists for predictable and stable bone augmentation materials.

Purpose of the Study:

• To evaluate the efficacy of particulate hydroxylapatite (HA) for alveolar ridge augmentation over a four-year period.
• To compare HA augmentation with autogenous bone grafts and other alloplasts.
• To assess the impact of HA augmentation on subsequent prosthetic rehabilitation and surgical procedures.

Main Methods:

• Prospective evaluation of HA used alone and with autogenous cancellous bone.
• Subperiosteal delivery via syringe injection under local or general anesthesia.
• Assessment of ridge height/width stability, prosthetic outcomes, and need for secondary procedures.

Main Results:

• HA augmentation resulted in stable and significant increases in alveolar ridge height and width.
• No significant postoperative resorption was observed, unlike with onlay bone grafts.
• Denture construction could begin earlier, and fewer denture relines were required post-HA augmentation.
• Reduced need for vestibuloplasty compared to onlay bone grafting.
• Improved stability and comfort for patients' dentures.

Conclusions:

• Particulate hydroxylapatite is a safe and effective material for alveolar ridge augmentation, offering stable and predictable results.
• HA provides a firm, nonmobile mucosal base, enhancing denture retention and stability.
• HA augmentation offers superior and more permanent outcomes than traditional onlay bone grafts and other alloplasts.
• HA shows potential as a bone substitute in various maxillofacial reconstructive procedures.