Comparison of autogenous and allograft bone rings in surgically created vertical bone defects around implants in a sheep model


BENLİDAYI M. E. , TATLI U. , SALİMOV F. , TÜKEL H. C. , Yuksel O.

CLINICAL ORAL IMPLANTS RESEARCH, vol.29, no.11, pp.1155-1162, 2018 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 11
  • Publication Date: 2018
  • Doi Number: 10.1111/clr.13379
  • Title of Journal : CLINICAL ORAL IMPLANTS RESEARCH
  • Page Numbers: pp.1155-1162

Abstract

Objectives The aim of this study was to compare autogenous and allograft bone rings in surgically created vertical bone defects. Material and methods Results Four male, 1-year-old sheep were used in this study. In each sheep, eight vertical bone defects 7 mm in diameter were created using trephine drill in the iliac wing. Autogenous and allograft bone rings 5 mm in height and 7 mm in diameter were used for vertical augmentation around implants. The study consisted of four groups according to the bone ring type and amount of vertical augmentation, autogenous 2 mm, allograft 2 mm, autogenous 4 mm, and allograft 4 mm. Two of the animals were sacrificed after 4 months, and the remaining two animals were sacrificed after 8 months. Undecalcified sections were prepared from harvested samples. Histological assessment and histomorphometric analysis were performed. Autogenous 2 mm group showed higher values than allograft 2 mm group, and autogenous 4 mm group showed higher values than allograft 4 mm group in terms of bone area and bone-to-implant contact (BIC) after 4 months. However, allograft 2 mm group showed higher bone area and BIC values than autogenous 2 mm group after 8 months. Also, autogenous 4 mm and allograft 4 mm groups showed comparable results after 8 months. Allograft 2 mm and allograft 4 mm groups showed higher bone area and BIC values at 8 months compared with 4 months. Conclusions Allograft bone ring looks promising in augmentation of surgically created vertical bone defects around implants after 8 months of healing.