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Augmentation of severly resorbed alveolar crests with bovine bone blocks: A human histology pilot study

Journal article
Authors Christer Slotte
Ulf Nannmark
Published in Clinical Implant Dentistry and Related Research
Volume 19
Issue 3
Pages 581-585
ISSN 1523-0899
Publication year 2017
Published at Institute of Odontology, Section 1
Institute of Clinical Sciences, Section for Anesthesiology, Biomaterials and Orthopaedics, Department of Biomaterials
Pages 581-585
Language English
Links doi.org/10.1111/cid.12478
Keywords allogenic, atrophy, bone graft, bone resorption, histology, oral implants, titanium, xenogenic, defects, grafts, Dentistry, Oral Surgery & Medicine
Subject categories Surgical research, Dentistry

Abstract

BackgroundAllo-/xenogenic bone blocks are used to treat bone defects. Few human histologic studies are found on their integration and capacity to augment new bone. PurposeTo study incorporation and stability of collagenated bovine bone blocks (CBB). Short term effects, histology, and morphometry on biopsy specimens are presented. Materials and MethodsNine patients exhibiting extremely narrow alveolar ridges had CBB adapted and fixed to the recipient bone and covered with collagen barriers. At median 6 months healing (range 2-14 months) biopsies were harvested and dental implants placed. Evaluation was done on the handling, primary healing together, and morphologic assessments of the biopsies. ResultsNew bone varied from 7.7% to 34.5%, lowest value being found in a patient showing graft exposure. Residual biomaterial varied between 2.9% and 48.2%. Implant placement was successful in all cases and all patients were rehabilitated with fixed superstructures. Several critical issues are discussed on the clinical handling of the material for example, soft tissue management and use of barrier membranes. ConclusionsCBB was found to integrate well in a predictable way. New bone could be seen at early time points and may shorten treatment time with implants in cases with thin alveolar ridges.

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