Effect of implant design and bone density in primary stability|
Oliscovicz, Nathalia Ferraz; Shimano, Antônio Carlos; Junior, Elcio Marcantonio; Lepri, César Penazzo & dos Reis, Andréa Cândido
Aim: To evaluate the influence of the format and surface treatment of implants, as well as the
substrate used in primary stability.
Methods: Thirty-two Conexão® implants were used: 8 conical
(CC) (11.5 x 3.5 mm) and 24 cylindrical (11.5 x 3.75 mm) – 8 external hexagon implants without
surface treatment (MS), 8 external hexagon implants with double Porous treatment (MP), 8
internal hexagon implants with Porous treatment (CA). They were inserted in Nacional®
polyurethane in three densities (15, 20 and 40 PCF). The insertion torque (IT) (N.cm) was
quantified using the digital Mackena® torque meter, and the pullout force (PF) (N) by means of
axial traction force with a 200 kg load cell, performed in a Universal Test Machine (Emic® DL-
10000) and the Tesc 3.13 software. Data were analyzed statistically by ANOVA and Tukey’s test
with a significance level of 5%.
Results: Difference was observed between groups (p<0.05).
Regarding the IT, MP and MS inserted to the substrate 40PCF showed higher values with
statistically significant difference with all interactions implants x substrate; the 15 and 20PCF densities
was not significant in all groups of implants. MP, MS, CC and CA did not differ significantly, even
inserted in a lower density, where CC showed better IT compared with other densities. For PF, the
best performance was the interaction implant CA x 40PCF substrate, showing a difference from the
other implants inserted in all substrates.
Conclusions: The higher bone density and cylindrical
implants with surface treatment provides greater IT and PF.
dental implants; biomechanics; bone substitutes; polyurethanes