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Implant-supported restoration of congenitally missing teeth using cancellous bone block-allografts

Nissan, Joseph and Mardinger, Ofer and Strauss, Morris and Peleg, Michael and Sacco, Roberto and Chaushu, Gavriel (2011) Implant-supported restoration of congenitally missing teeth using cancellous bone block-allografts. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology, Vol. 11 (3), p. 286-291. ISSN 1079-2104. Article.

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DOI: 10.1016/j.tripleo.2010.04.042

Abstract

Background and objective
Patients with congenitally missing teeth may present with undeveloped alveolar bone morphology, making implant reconstruction a challenge. The aim of the present study was to evaluate the outcome of dental implants after ridge augmentation with cancellous freeze-dried block bone allografts in patients with congenitally missing teeth.
Study design
Twelve patients with a mean age of 21 ± 4 years, were included. Congenitally missing teeth included maxillary lateral incisors, a maxillary canine, and mandibular central and lateral incisors. A bony deficiency of >3 mm horizontally and <3 mm vertically according to computerized tomography served as inclusion criteria. Twenty-one implants were inserted after a healing period of 6 months. Five out of 21 implants were immediately restored. Bone measurements were taken before bone augmentation, during implant placement, and at second-stage surgery.
Results
Nineteen cancellous allogeneic bone-blocks were used. The mean follow-up time was 30 ± 16 months. Bone block and implant survival rates were 100% and 95.2%, respectively. Mean bone gain was statistically significant (P < .001): 5 ± 0.5 mm horizontally and 2 ± 0.5 mm vertically. All of the patients received a fixed implant-supported prosthesis. Soft tissue complications occurred in 4 patients (30%). Complications after cementation of the crowns were seen in 1 implant (4.8%). All implants remained clinically osseointegrated at the end of the follow-up examination. There was no crestal bone loss around the implants beyond the first implant thread.
Conclusion
Cancellous bone block-allografts can be used successfully for implant-supported restorations in patients with congenitally missing teeth.

Item Type:Article
ID Code:5566
Status:Published
Refereed:Yes
Uncontrolled Keywords:Oral and maxillofacial surgery, dental implants, congenitally missing teeth
Subjects:Area 06 - Scienze mediche > MED/28 Malattie odontostomatologiche
Divisions:001 Università di Sassari > 03 Istituti > Clinica odontoiatrica
Publisher:Mosby
ISSN:1079-2104
Copyright Holders:© 2011 Mosby
Deposited On:07 Mar 2011 18:05

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