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

Nissan, J; Mardinger, O; Strauss, M; Peleg, M; Sacco, R; Chaushu, G; (2011) Implant-supported restoration of congenitally missing teeth using cancellous bone block-allografts. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology , 111 (3) pp. 286-291. 10.1016/j.tripleo.2010.04.042. Green open access

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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.

Type: Article
Title: Implant-supported restoration of congenitally missing teeth using cancellous bone block-allografts
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.tripleo.2010.04.042
Publisher version: https://doi.org/10.1016/j.tripleo.2010.04.042
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute
URI: https://discovery.ucl.ac.uk/id/eprint/10041710
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