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Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2010 Nov;110(5):e24-36. doi: 10.1016/j.tripleo.2010.06.006.

Esthetic alveolar ridge preservation with calcium phosphate and collagen membrane: preliminary report.

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Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.



The objective of this study was to evaluate clinically, histologically and radiographically a ridge preservation technique used on extraction sockets grafted with biphasic calcium phosphate (BCP) and a resorbable collagen membrane.


Patients having a labial socket wall defect more than one-third in mesio-distal socket width after maxillary central incisor tooth extraction were included. The labial defect was sealed with resorbable collagen membrane and the defect filled with BCP. The grafted socket was covered with a resorbable collagen wound dressing material. The treated sockets were evaluated after a 4-month healing period when implants were placed and followed for up to 12 months.


There were 8 subjects enrolled in this study. A statistical difference was found only in ridge width reduction at 3 mm below the cement-enamel junction of the adjacent teeth (P < .05) with 1 mm widening at 8 mm. The amount of new bone formation was extensively varied with diminutive graft remnants. Most cells in the connective tissue were osteopontin positive indicating they were osteoblast-like cells. A declination in the radiodensity of the grafted socket was observed during the analyzed period.


Ridge preservation with BCP with collagen membrane can be used as an alternative treatment for maintaining ridge dimension before implant placement.

[Indexed for MEDLINE]

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