The effect of osseodensification drilling for endosteal implants with different surface treatments: A study in sheep

Autor(es)

Lahens, Bradley ^[1] ; Lopez, Christopher D. ^[1] ; Neiva, Rodrigo F. ^[2] ; Bowers, Michelle M. ^[1] ; Jimbo, Ryo ^[3] ; Bonfante, Estevam A. ^[4] ; Morcos, Jonathan ^[1] ; Witek, Lukasz ^[1] ; Tovar, Nick ^[1] ; Coelho, Paulo G. ^{[1, 5]}

Afiliação do(s) autor(es)

^[1] NYU, Coll Dent, Dept Biomat & Biomimet, New York, NY 10010 - USA

^[2] Univ Florida, Dept Periodontol, Coll Dent, Gainesville, FL 32610 - USA

^[3] Malmo Univ, Fac Odontol, Dept Oral & Maxillofacial Surg & Oral Med, Malmo - Sweden

^[4] Univ Sao Paulo, Bauru Sch Dent, Dept Prosthodont & Periodontol, Bauru, SP - Brazil

^[5] NYU, Sch Med, Hansjorg Wyss Dept Plast Surg, New York, NY 10016 - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS; v. 107, n. 3, p. 615-623, APR 2019.
• Citações Web of Science: 0

Resumo

This study investigated the effects of osseodensification drilling on the stability and osseointegration of machine-cut and acid-etched endosteal implants in low-density bone. Twelve sheep received six implants inserted into the ilium, bilaterally (n=36 acid-etched, and n=36 as-machined). Individual animals received three implants of each surface, placed via different surgical techniques: (1) subtractive regular-drilling (R): 2.0 mm pilot, 3.2 and 3.8 mm twist drills); (2) osseodensification clockwise-drilling (CW): Densah Bur (Versah, Jackson, MI) 2.0 mm pilot, 2.8, and 3.8 mm multifluted tapered burs; and (3) osseodensification counterclockwise-drilling (CCW) Densah Bur 2.0 mm pilot, 2.8 mm, and 3.8 mm multifluted tapered burs. Insertion torque was higher in the CCW and CW-drilling compared to the R-drilling (p<0.001). Bone-to-implant contact (BIC) was significantly higher for CW (p=0.024) and CCW-drilling (p=0.006) compared to the R-drilling technique. For CCW-osseodensification-drilling, no statistical difference between the acid-etched and machine-cut implants at both time points was observed for BIC and BAFO (bone-area-fraction-occupancy). Resorbed bone and bone forming precursors, preosteoblasts, were observed at 3-weeks. At 12-weeks, new bone formation was observed in all groups extending to the trabecular region. In low-density bone, endosteal implants inserted via osseodensification-drilling presented higher stability and no osseointegration impairments compared to subtractive regular-drilling technique, regardless of evaluation time or implant surface. (c) 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 615-623, 2019. (AU)

• Processo FAPESP: 12/19078-7 - Desenvolvimento e processamento de compósito de Al2O3-ZrO2 para próteses monolíticas CAD/CAM: efeito do envelhecimento na resistência à flexão biaxial
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