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Comparison of autogenous and allograft bone rings in surgically created vertical bone defects around implants in a sheep model
Author(s) -
Benlidayi Mehmet Emre,
Tatli Ufuk,
Salimov Fariz,
Tükel Hüseyin Can,
Yüksel Orcan
Publication year - 2018
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.13379
Subject(s) - trephine , medicine , implant , dentistry , iliac bone , surgery
Objectives The aim of this study was to compare autogenous and allograft bone rings in surgically created vertical bone defects. Material and methods 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. Results 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.