RESUMO
OBJECTIVES: This randomized controlled trial used resonance frequency analysis (RFA) to assess the effects of the presence or absence of a cast rigid bar splinting multiple implants in the stability of immediately loaded implants. MATERIAL AND METHODS: Twenty-nine edentulous patients were randomly divided into two groups: G1 with full-arch implant-fixed prostheses and G2 with multiple implant splinting via acrylic resin denture bases. All implants were immediately loaded. RFA measurements assessed implant stability at three different times (T0--at baseline, T1--4 months, and T2--8 months. Wilcoxon and Friedman tests and a multivariate model with repeated measures for longitudinal data were used for statistical comparison (α = 0.05). RESULTS: Twenty-nine patients were assessed (G1 = 15 and G2 = 14). Implant and prostheses survival rates were 100% for both groups after the 8-month observation period and no significant differences in the mean ISQ values were found at the different implant stability assessment times (P > 0.05). CONCLUSIONS: The different splinting protocols did not appear to affect implant stability during the 8-month observation period.
Assuntos
Implantes Dentários , Carga Imediata em Implante Dentário , Arcada Edêntula/reabilitação , Mandíbula/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Ligas Dentárias , Planejamento de Prótese Dentária , Falha de Restauração Dentária , Bases de Dentadura , Planejamento de Dentadura , Retenção de Dentadura , Prótese Total Inferior , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Taxa de Sobrevida , Resultado do TratamentoRESUMO
AIM: Primary and secondary stabilities of immediately loaded mandibular implants restored with fixed prostheses (FP) using rigid or semi-rigid splinting systems were clinically and radiographically evaluated. METHODS: Fifteen edentulous patients were rehabilitated using hybrid FP; each had 5 implants placed between the mental foramens. Two groups were randomly divided: group 1-FP with the conventional rigid bar splinting the implants and group 2-semi-rigid cantilever extension system with titanium bars placed in the 2 distal abutment cylinders. Primary stability was evaluated using resonance frequency analysis after installation of the implant abutments. The measurements were made at 3 times: T0, at baseline; T1, 4 months after implant placement; and T2, 8 months after implant placement. Presence of mobility and inflammation in the implant surrounding regions were checked. Stability data were submitted to statistical analysis for comparison between groups (P < 0.05). RESULTS: Implant survival rate for the implants was of 100% in both groups. No significant differences in the mean implant stability quotient values were found for both groups from baseline and after the 8-month follow-up. CONCLUSION: The immediate loading of the implants was satisfactory, and both splinting conditions (rigid and semi-rigid) can be successfully used for the restoration of edentulous mandibles.