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


METHODS
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.


RESULTS
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.


CONCLUSIONS
Ridge preservation with BCP with collagen membrane can be used as an alternative treatment for maintaining ridge dimension before implant placement.
Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
Sasikarn
S
Kesmas
Somporn
S
Swasdison
Somchai
S
Yodsanga
Somchai
S
Sessirisombat
Pornchai
P
Jansisyanont
D020341:Absorbable Implants; D000328:Adult; D000539:Alveolar Process / Q000473:pathology; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D001706:Biopsy; D015519:Bone Density / Q000502:physiology; D018786:Bone Substitutes / Q000627:therapeutic use*; D002130:Calcium Phosphates / Q000627:therapeutic use*; D002508:Cephalometry; D003094:Collagen; D003238:Connective Tissue / Q000473:pathology; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D004955:Esthetics, Dental; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000601:surgery; D008297:Male; D008437:Maxilla / Q000473:pathology / Q000601:surgery*; D008567:Membranes, Artificial; D008875:Middle Aged; D010006:Osteoblasts / Q000473:pathology; D010012:Osteogenesis / Q000502:physiology; D053495:Osteopontin / Q000032:analysis; D011446:Prospective Studies; D016300:Radiography, Bitewing; D014081:Tooth Extraction / Q000379:methods; D020390:Tooth Socket / Q000601:surgery*
D018786:Bone Substitutes; D002130:Calcium Phosphates; D015921:Dental Implants; D008567:Membranes, Artificial; D053495:Osteopontin; D003094:Collagen; C485829:calcium phosphate, dibasic, anhydrous