In vitro evaluation of the influence of bone cortical thickness on the primary stability of conventional- and short-sized implants.

Autor:	Barros LA; DDS, pHD. Department of Diagnosis and Surgery, Univ. Est. Paul. - UNESP, Araraquara, Brazil., da Silva CF; MS. Department of Periodontology/Implantology, Dental School, Federal University of Uberlândia - UFU, Uberlândia, Brazil., Camargos GV; DDS. Department of Periodontology/Implantology, Dental School, Federal University of Uberlândia - UFU, Uberlândia, Brazil., Marcantonio E Jr; DDS. Department of Diagnosis and Surgery, Univ. Est. Paul. - UNESP, Araraquara, Brazil., de Oliveira GJ; DDS. Department of Periodontology/Implantology, Dental School, Federal University of Uberlândia - UFU, Uberlândia, Brazil., Barros-Filho LA; DDS. Department of Oral Surgery, Dental School, Universidade de Araraquara, UNIARA, Araraquara, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of clinical and experimental dentistry [J Clin Exp Dent] 2022 Feb 01; Vol. 14 (2), pp. e138-e143. Date of Electronic Publication: 2022 Feb 01 (Print Publication: 2022).
DOI:	10.4317/jced.58886
Abstrakt:	Background: The aim of this in vitro study was to evaluate the influence of the cortical thickness on the primary stability of short and conventional-sized implants with two types of prosthetic connection. Material and Methods: Seventy-two implants were used. These implants were placed in polyurethane blocks that simulated low-density bone tissue (type IV bone), with two bone cortical heights (type I bone): 1mm and 3mm. The implants were divided into 6 groups with 12 implants each according to the type of prosthetic connections (external-hexagon -EH and morse taper- MT) and implant sizes (conventional- 4x10mm and short 5x5mm; 5.5x5mm; 5x6mm; 5.5x6mm). Insertion torque (IT) and resonance frequency analyzes (RFA) were performed to evaluate the primary stability of the implants. Results: All implants installed in blocks with 3mm of cortical thickness showed greater IT than those installed in 1mm. The short-sized MT implants had a higher IT than conventional implants of the same connection. Short-sized EH implants showed less IT than short-sized MT implants in blocks with 3mm of cortical. In blocks with 1mm of cortical, conventional EH implants had a higher IT compared to short-sized EH implants. The conventional sized implants presented higher RFA values despite the thickness of the cortical in the blocks. Conclusions: The greater bone cortical thickness and implants size provides greater primary stability of the implants regardless the prosthetic connection. Key words: Implants connection, implants macrostructure, primary stability. Competing Interests: Conflicts of interest The authors declares to have no conflicts of interesting. (Copyright: © 2022 Medicina Oral S.L.)
Databáze:	MEDLINE
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