Mariana Lima da Costa Valente1, Denise Tornavoi de Castro1, Antonio Carlos Shimano2, César Penazzo Lepri3, Andréa Cândido dos Reis1. 1. Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil. 2. Department of Biomechanics, Medicine, and Rehabilitation of Locomotive Apparatus, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil. 3. Department of Biomaterials, School of Dentistry of Uberaba, Uberaba, Brazil.
Abstract
BACKGROUND: The macrogeometry of dental implants strongly influences the primary stability and hence the osseointegration process. PURPOSE: Compare the performance of conventional and modified implant models in terms of primary stability. MATERIALS AND METHODS: A total of 36 implants (Neodent®) with two different formats (n = 18): Alvim CM (Conical CM, Ø 4.3 mm × 10 mm in length) and Titamax Ti (Cylindrical HE, Ø 4.0 mm × 11 mm in length) were inserted into artificial bone blocks. Nine implants from each set were selected to undergo external geometry changes. The primary stability was quantified by insertion torque and resonance frequency using an Osstell device and the pullout test. One-way analysis of variance and Tukey's test were used for statistical evaluation. RESULTS: The comparative analysis of the implants showed a significant increase of the insertion torque for the modified Conical CM implants (p = 0.000) and Cylindrical HE (p = 0.043); for the resonance frequency the modified Cylindrical HE showed a lower statistical mean (p = 0.002) when compared to the conventional model, and in the pullout test both modified implants showed significant reduction (p = 0.000). CONCLUSIONS: Within the limitations of this study, the proposed modification showed good stability levels and advantages when compared to the conventional implants.
BACKGROUND: The macrogeometry of dental implants strongly influences the primary stability and hence the osseointegration process. PURPOSE: Compare the performance of conventional and modified implant models in terms of primary stability. MATERIALS AND METHODS: A total of 36 implants (Neodent®) with two different formats (n = 18): Alvim CM (Conical CM, Ø 4.3 mm × 10 mm in length) and Titamax Ti (Cylindrical HE, Ø 4.0 mm × 11 mm in length) were inserted into artificial bone blocks. Nine implants from each set were selected to undergo external geometry changes. The primary stability was quantified by insertion torque and resonance frequency using an Osstell device and the pullout test. One-way analysis of variance and Tukey's test were used for statistical evaluation. RESULTS: The comparative analysis of the implants showed a significant increase of the insertion torque for the modified Conical CM implants (p = 0.000) and Cylindrical HE (p = 0.043); for the resonance frequency the modified Cylindrical HE showed a lower statistical mean (p = 0.002) when compared to the conventional model, and in the pullout test both modified implants showed significant reduction (p = 0.000). CONCLUSIONS: Within the limitations of this study, the proposed modification showed good stability levels and advantages when compared to the conventional implants.
Authors: Manuel Fernández-Domínguez; Victor Ortega-Asensio; Elena Fuentes-Numancia; Juan Manuel Aragoneses; Horia Mihail Barbu; María Piedad Ramírez-Fernández; Rafael Arcesio Delgado-Ruiz; José Luis Calvo-Guirado; Nahum Samet; Sergio Alexandre Gehrke Journal: J Clin Med Date: 2019-05-07 Impact factor: 4.241