Avaliação da interface protética pilar-implante de conexões cônicas por técnica de microtomografia 3D : estudo in vitro
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Data
2017-09-29
Autores
Ribeiro, Luiz Rogério Oliveira
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Universidade Federal do Espírito Santo
Resumo
Fitting accuracy of an implant system components can determine the success of a treatment in implantology. Objective: To evaluate the prosthetic connection area of 03 implant systems with conical connection before and after placing prosthetic abutment. Materials and methods: Eighteen implants of three systems with conical prosthetic connection and the respective indexed and screwed straight posts were made: Group 1: Ankylos (ANK), Group 2: SIN (SIN) and Group 3: Titanium Fix (TF). Implants were placed vertically in a cylindrical form with self-curing acrylic resin and examined (T1) by a microtomograph (Bruker micro-CT Skyscan 1076 - Belgium). Then abutments were placed in the implants and the samples were taken for a second scan (T2). Parameters analyzed were: D1- Angle (°) of the internal walls of the implant conical connection, D2- Height (mm) of the conical connection of the implant available for contact, D3- Internal diameter (mm) of the conical connection in the most cervical portion, D4- Area (mm²) of the available conical connection of the implant, D5- Area (mm²) of the conical connection of the effective abutment / implant contact. Data were subjected to the Kruskal-Wallis and Wilcoxon tests (=5%) and Spearman correlation (=1%). Results: There was a statistical difference for D1 between T1 and T2 times, comparing ANK (5.78 and 6.32), SIN (8.63 and 9.54) and TF (11.01 and 11.44) (p<0.05). For D2, there was no statistical difference between T1 and T2 times for ANK (2.12 and 1.87) (p=0.11) and SIN (1.64 and 1.57) (p=0.24) but there were in the TF (1.04 and 0.68) (p<0.05). For the D3, there was a statistical difference between T1 and T2 in ANK (2.49 and 2.56), SIN (2.68 and 2.72) and TF (2.75 and 2.82) (p<0.05). For D4, there was no statistical difference for ANK (25.36 and 22.58) (p>=0.24) but there were for SIN (25,22 and 22,57) and TF (18,34 and 16,01) (p<0.05). For D5, there were similar statistical results for ANK (22.58) (p= 1.00) and SIN (20.73) (p=0.10) and larger than TF (12.71) (p>0,05). There was a positive statistical correlation between D1/T1 and D2/T2 and D2/T1 and D1/T2 (p <0.01) between D4/T1 and D5/T2 (p<0.01). Conclusion: Conical connections present differences in most of the studied parameters, demonstrating that the characteristics of the conical connection of each system is unique. The insertion of the abutment caused changes in the conical connection in all parameters studied. The Area (mm²) of the effective pillar/implant contact conical connection is dependent on the implant system.
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Palavras-chave
X-ray microtomography , Dental implant , Morse pivotal implant connection , Morse pivotal implant interface , Microtomografia por raio-X , Implante dentário , Conexão implante dentário-pivô morse , Interface implante dentário-pivô morse