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Clinical and Histomorphometric Assessment of Lateral Alveolar Ridge Augmentation Using a Corticocancellous Freeze-Dried Allograft Bone Block

Authors :
Ahmadi, Roya Shariatmadar
Sayar, Ferena
Rakhshan, Vahid
Iranpour, Babak
Jahanbani, Jahanfar
Toumaj, Ahmad
Akhoondi, Nasrin
Source :
Journal of Oral Implantology; June 2017, Vol. 43 Issue: 3 p202-210, 9p
Publication Year :
2017

Abstract

Horizontal ridge augmentation with allografts has attracted notable attention because of its proper success rate and the lack of disadvantages of autografts. Corticocancellous block allografts have not been adequately studied in humans. Therefore, this study clinically and histomorphometrically evaluated the increase in ridge width after horizontal ridge augmentation using corticocancellous block allografts as well as implant success after 12 to 18 months after implantation. In 10 patients receiving implants (3 women, 7 men; mean age 45 years), defective maxillary alveolar ridges were horizontally augmented using freeze-dried bone allograft blocks. Ridge widths were measured before augmentation, immediately after augmentation, and ∼6 months later in the reentry surgery for implantation. This was done at points 2 mm (A) and 5 mm (B) apically to the crest. Biopsy cores were acquired from the implantation site. Implant success was assessed 15.1 ± 2.7 months after implantation (range 12–18 months). Data were analyzed using Friedman and Dunn tests (α 0.05). At point A, ridge widths were 2.77 ± 0.37, 8.02 ± 0.87, and 6.40 ± 0.66 mm, respectively, before surgery, immediately after surgery, and before implantation. At point B, ridge widths were 3.40 ± 0.39, 9.35 ± 1.16, and 7.40 ± 1.10 mm, respectively, before surgery, immediately after surgery, and before implantation. The Friedman test showed significant increases in ridge widths, both at point A and point B (both P .0000). Postaugmentation resorption was about 1.5–2 mm and was statistically significant at points A and B (P< .05, Dunn). The percentage of newly formed bone, residual graft material, and soft tissue were 33.0 ± 11.35 (95 confidence interval CI 24.88–41.12), 37.50 ± 19.04 (95 CI 23.88–51.12), and 29.5, respectively. The inflammation was limited to grades 1 or zero. Twelve to 18 months after implantation, no implants caused pain or showed exudates or pockets. Radiographic bone loss was 2.0 ± 0.7 mm (range 1–3). It can be concluded that lateral ridge augmentation with corticocancellous allograft blocks might be successful both clinically and histologically. Implants might have a proper clinical success after a minimum of 12 months.

Details

Language :
English
ISSN :
01606972 and 15481336
Volume :
43
Issue :
3
Database :
Supplemental Index
Journal :
Journal of Oral Implantology
Publication Type :
Periodical
Accession number :
ejs42819005
Full Text :
https://doi.org/10.1563/aaid-joi-D-16-00042