Estabilidade primária de implantes cone-morse obtida pela osseodensificação versus técnicas convencional e de subfresagem: estudo ex vivo

Artigo avalia a estabilidade primária de implantes cone-morse obtida com a utilização de três técnicas de osteotomia em osso de baixa densidade.

AUTORES

Paulo Roberto Blank Gonçalves
Mestre em Implantodontia – Faculdade São Leopoldo Mandic.
Orcid: 0000-0001-5030-2283.

Carlos Eduardo Francischone
Doutor em Reabilitação Oral e professor de Implantodontia – Faculdade São Leopoldo Mandic.
Orcid: 0000-0003-2627-5646.

Alexandre Marcelo de Carvalho
Doutor em Implantodontia e professor de Implantodontia – Faculdade São Leopoldo Mandic.
Orcid: 0000-0001-8080-8314.

Bruno Salles Sotto Maior
Doutor em Prótese Dental e professor do Depto. de Clínica Odontológica – Universidade Federal de Juiz de Fora.
Orcid: 0000-0002-9462-0299.

RESUMO

Objetivo: avaliar a estabilidade primária de implantes cone-morse obtida com a utilização de três técnicas de osteotomia em osso de baixa densidade (tipo IV) proveniente de costelas bovinas frescas. Material e métodos: 30 implantes foram divididos de acordo com a técnica utilizada: grupo FC (fresagem convencional); grupo SF (subfresagem); e grupo OD (osseodensificação). Imediatamente após a instalação dos implantes, o ISQ foi aferido utilizando-se um dispositivo de RFA, e os valores de torque de inserção e remoção foram mensurados utilizando-se um torquímetro digital. Os dados foram analisados pelo teste Anova-1 critério e teste de Tukey (nível de significância 5%). Resultados: os valores ISQ, torques de inserção e remoção no grupo OD (71 ± 3 Ncm, 40 ± 7 Ncm e 38 ± 6 Ncm) foram significativamente maiores (p < 0,05) do que no grupo SF (67 ± 3 Ncm, 33 ± 6 Ncm e 31 ± 6 Ncm), e estes significativamente maiores (p < 0,05) do que no grupo FC (56 ± 3 Ncm, 23 ± 4 Ncm e 20 ± 3 Ncm). Conclusão: a técnica de osseodensificação mostrou-se superior às técnicas de subfresagem e fresagem convencional quanto à estabilidade primária de implantes cone-morse instalados em osso de baixa densidade de costelas bovinas.

Palavras-chave – Implantes dentários; Interface osso-implante; Osteotomia; Torque; Análise de frequência de ressonância.

ABSTRACT

Objective: to evaluate the primary stability of Morse taper implants after three osteotomy techniques were used in the low-density bone (type IV) of fresh bovine ribs. Material and methods: thirty implants were divided into three groups, according to the bone cutting technique used: group CD (conventional drilling); group UD (undersized drilling); and group OD (osseodensification). The ISQ was determined immediately after installing the implants, by using an RFA device, and the insertion and removal torque values were measured by using a digital torque wrench. The data were statistically analyzed using one-way analysis of variance and Tukey’s test. The level of significance used was 5%. Results: the ISQ, and the insertion and removal torque values found for group OD (71 ± 3 Ncm, 40 ± 7 Ncm and 38 ± 6 Ncm) were significantly higher (p < 0.05) than those found for group UD (67 ± 3 Ncm, 33 ± 6 Ncm and 31 ± 6 Ncm), and these were significantly higher (p < 0.05) than those found for group CD (56 ± 3 Ncm, 23 ± 4 Ncm and 20 ± 3 Ncm). Conclusion: the osseodensification technique proved superior to the conventional and undersized drilling techniques for increasing the primary stability of Morse taper implants placed in low-density bone of bovine ribs.

Key words – Dental implants; Bone-implant interface; Osteotomy; Torque; Resonance frequency analysis.

Recebido em set/2021
Aprovado em nov/2021

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