Analysis of the influence of implant shape on primary stability using the correlation of multiple methods

Autor(es)

da Costa Valente, Mariana Lima ^[1] ; de Castro, Denise Tornavoi ^[1] ; Shimano, Antonio Carlos ^[2] ; Lepri, Cesar Penazzo ^[3] ; dos Reis, Andrea Candido ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Dent Ribeirao Preto, Dept Dent Mat & Prosthesis, BR-14040904 Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Dept Biomech Med & Rehabil Locomot Apparat, Sch Med Ribeirao Preto, BR-14040904 Ribeirao Preto, SP - Brazil

^[3] Sch Dent Uberaba, Dept Biomat, Uberaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CLINICAL ORAL INVESTIGATIONS; v. 19, n. 8, p. 1861-1866, NOV 2015.
• Citações Web of Science: 9

Resumo

Objectives The purpose of this study was to analyze the influence of the shape of various implants and the density of substrate on primary stability using a combination of methods. Materials and methods Fifty-four NeodentA (R) brand cylindrical and conical implants with different prosthetic platforms were used. Implants were inserted into a pork rib bone and polyurethane blocks. Primary stability was assessed by insertion torque (IT), resonance frequency analysis (RFA), and pullout strength. Screws were also analyzed by scanning electron microscopy (SEM) before insertion and after removal to justify their use for inserting in different substrates. Results The conical cone morse implant had the highest average for all of the assays performed and was significantly different (p < 0.05) from the cylindrical implants for IT in the bone, pullout strength in the 40 per cubic foot (PCF) polyurethane, and the bone. The internal hex cylindrical implant had the lowest averages, which were significantly different (p < 0.05) from the conical implants for IT and RFA in the bone, pullout strength in the 40 PCF polyurethane, and the bone. The IT, RFA, and pullout strength assays were moderately correlated, and the photomicrographs did not reveal changes in the implants. Conclusions The analysis of different implants showed a better primary stability of tapered implants; the density of the substrate influences the primary stability and the 15 PCF polyurethane was not adequate to evaluate primary stability; correlation was obtained between the different methodologies of analysis of primary stability. (AU)

• Processo FAPESP: 12/09208-0 - Análise da estabilidade primária de implantes convencionais e modificados com diferentes formatos por meio de ensaios de desempenho, frequência de ressonância e caracterização micro estrutural
• Beneficiário: Andréa Cândido dos Reis
• Modalidade de apoio: Auxílio à Pesquisa - Regular