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Evaluation of Resorption and Osseointegration of Autogenous Bone Ring Grafting in Vertical Bone Defect With Simultaneous Implant Placement in Dogs.

Authors
  • Yu, Ke1
  • Liu, Wenjia2
  • Su, Naichuan3
  • Chen, Helin3
  • Wang, Hang3
  • Tan, Zhen3
  • 1 State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China; College of Stomatology, Hospital of Stomatology, Southwest Medical University, Luzhou, China. , (China)
  • 2 Sichuan Hospital of Stomatology, Chengdu, China. , (China)
  • 3 State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China School & Hospital of Stomatology, Sichuan University, Chengdu, China. , (China)
Type
Published Article
Journal
The Journal of oral implantology
Publication Date
Aug 01, 2021
Volume
47
Issue
4
Pages
295–302
Identifiers
DOI: 10.1563/aaid-joi-D-19-00199
PMID: 32870248
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The aim of this research was to evaluate the resorption and osseointegration of an autogenous bone ring, which was grafted in a local vertical alveolar defect with simultaneous implant placement. Six Beagle dogs were enrolled in the study; their 4 nonadjacent mandibular premolars were extracted, and the buccal plate was removed to create bone defects in 2 of the 4 sites. Three months after extraction, Straumann implants (Ø 3.3 mm, length of 8 mm) were placed in the bone defect sites with simultaneous autogenous bone ring grafting and in the conventional extraction sites. After a 3-month healing period and a 3-month loading period, the animals were euthanized. The harvested samples were analyzed using micro-computed tomography (CT) scanning and histological analysis. From the micro-CT measurements, the average vertical bone resorption of the bone ring was 0.23 ± 0.03 mm, which was not significantly different from that around the conventional implant, 0.24 ± 0.12 mm (P > .05). The ratio of the bone volume to the total volume of the bone ring group was 91.11 ± 0.02, which was higher than that of the control group, 88.38 ± 2.34 (P < .05). From the hard tissue section, the bone rings developed fine osseointegration with the implants and the base alveolar bone. The results suggest autogenous bone ring grafting with simultaneous implant placement can survive in a local vertical bone defect with little bone resorption and good osseointegration in dogs with strict management. A bone ring graft must be compared with guided bone regeneration, and a larger and longer observation must be confirmed in clinical patients.

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