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Abstract(s)
Introdução: A perda óssea marginal (POM) apresenta uma etiologia multifatorial que não se encontra totalmente estabelecida na literatura, vários parâmetros podem influenciar este processo, essencialmente biológicos e mecânicos, e relacionados com o implante, os tecidos peri-implantares, a prótese e as individualidades de cada paciente. Objetivos: Comparar as alterações ósseas marginais a longo prazo, que ocorrem em implantes dentários colocados em setores posteriores mandibulares usando diferentes pilares protéticos, com diferentes alturas, colocados em diferentes tempos de tratamento. Materiais e Métodos: O estudo foi planeado como retrospetivo observacional de grupos controlo, englobando uma amostra de pacientes com áreas mandibulares posteriores edentulas com necessidade de pelo menos 2 implantes. Distribuídos em 3 grupos: Grupo A (implantes imediatamente conectados a pilar protético de 2mm), Grupo B (implantes imediatamente conectados a pilar protético de 1mm) e Grupo C (implantes conectados a pilar protético de 2mm num segundo tempo cirúrgico).Foram realizadas medições radiográficas e clínicas durante um período de 60 meses. A POM foi delineada como a principal variável em estudo. O nível de significância usado foi de 5% (p ≤ 0,05). Resultados: Foram incluídos no estudo 33 indivíduos, com um total de 67 implantes. A Média de POM a 5 anos foi de -0,153±0,310; 0,030±0,291; e 0,319±0,439mm para os grupos A,B e C, respetivamente, sendo significativa nos grupos A e C, e com diferenças significativas entre os mesmos. O momento da colocação do pilar protético (p =0,000), POM em baseline (p=0,000) e variação da POM a 1 ano (p=0,019) foram fatores preditores significativos da variação da POM a 5 anos. Conclusão: A colocação imediata de pilares de 2mm nas áreas posteriores da mandíbula apresenta-se como uma opção de tratamento favorável em termos de manutenção óssea marginal peri-implantar a longo prazo, quando comparada com a colocação imediata de pilares curtos ou com o protocolo convencional de dois momentos cirúrgicos.
Introduction: Marginal bone loss (POM) has a multifactorial etiology that is not fully established in the literature, several parameters can influence this process, essentially biological and mechanical, and related to the implant, the peri-implant tissues, the prosthesis and the individualities of each patient. Objectives: The aim of this study was to compare how long-term marginal bone changes that occur in dental implants used in the posterior mandibular sectors using different prosthetic abutments, with different heights, at different times of treatment. Materials and Methods: The study was designed as an observational retrospective of control groups, comprising a sample of patients with posterior mandibular areas and edentulous with the need for at least 2 implants. Distributed in 3 groups: Group A (implants immediately connected to a 2mm prosthetic abutment), Group B (implants immediately connected to a 1mm prosthetic abutment) and Group C (implants connected to a 2mm prosthetic abutment in a second surgical procedure). Radiographic and clinical measurements were performed over a period of 60 months. MBL was outlined as the main variable under study. The level of significance used was 5% (p ≤ 0.05). Results: 33 patients were included in the study, with a total of 67 implants. The mean MBL at 5 years was -0.153 ± 0.310; 0.030 ± 0.291; and 0.319 ± 0.439mm for groups A, B and C, respectively, being significant in groups A and C, and with significant differences between them. The timing of the placement of the prosthetic abutment (p = 0.000), MBL in baseline (p = 0.000) and variation of the MBL at 1 year (p = 0.019) were significant predictive factors for the variation of the MBL at 5 years. Conclusion: The immediate placement of 2mm abutments in the posterior areas of the mandible presents itself as a favorable treatment option in terms of long-term peri-implant marginal bone maintenance, when compared with the immediate placement of short abutments or with the conventional protocol. of two surgical moments.
Introduction: Marginal bone loss (POM) has a multifactorial etiology that is not fully established in the literature, several parameters can influence this process, essentially biological and mechanical, and related to the implant, the peri-implant tissues, the prosthesis and the individualities of each patient. Objectives: The aim of this study was to compare how long-term marginal bone changes that occur in dental implants used in the posterior mandibular sectors using different prosthetic abutments, with different heights, at different times of treatment. Materials and Methods: The study was designed as an observational retrospective of control groups, comprising a sample of patients with posterior mandibular areas and edentulous with the need for at least 2 implants. Distributed in 3 groups: Group A (implants immediately connected to a 2mm prosthetic abutment), Group B (implants immediately connected to a 1mm prosthetic abutment) and Group C (implants connected to a 2mm prosthetic abutment in a second surgical procedure). Radiographic and clinical measurements were performed over a period of 60 months. MBL was outlined as the main variable under study. The level of significance used was 5% (p ≤ 0.05). Results: 33 patients were included in the study, with a total of 67 implants. The mean MBL at 5 years was -0.153 ± 0.310; 0.030 ± 0.291; and 0.319 ± 0.439mm for groups A, B and C, respectively, being significant in groups A and C, and with significant differences between them. The timing of the placement of the prosthetic abutment (p = 0.000), MBL in baseline (p = 0.000) and variation of the MBL at 1 year (p = 0.019) were significant predictive factors for the variation of the MBL at 5 years. Conclusion: The immediate placement of 2mm abutments in the posterior areas of the mandible presents itself as a favorable treatment option in terms of long-term peri-implant marginal bone maintenance, when compared with the immediate placement of short abutments or with the conventional protocol. of two surgical moments.
Description
Keywords
Perda óssea marginal Implantes dentários Marginal bone loss Dental implants