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J Oral Sci ; 63(1): 92-97, 2020 Dec 23.
Artículo en Inglés | MEDLINE | ID: mdl-33311012


PURPOSE: Implant component fractures are one of the most serious complications in implant treatment. With a better understanding of the risk factors for fracture in the preoperative, surgery, superstructure, and post-loading phases of implant treatment, low-risk treatment could reduce implant component fractures, leading to a better prognosis. The aim of this study was to clarify the risk factors for abutment and implant fractures that occur after loading, and to perform a retrospective, approximately 10-year follow-up study to explore the risk factors in each treatment phase. METHODS: Subjects were fitted with an implant prosthesis between January 2008 and December 2009. In total, 1,126 Ankylos implants in 430 patients were included for analysis. Binary logistic regression analysis was performed to extract factors related to non-fracture and fracture of the abutment or implant as a dependent variable. RESULTS: Gender (OR = 3.466, 95% CI 1.296-9.268, P = 0.013), gonial angle (OR = 3.420, 95% CI 1.308-8.945, P = 0.012), and splinting status of the superstructure (OR = 4.456, 95% CI 1.861-10.669, P = 0.001) were identified as significant risk factors. CONCLUSION: The risk of fracture is increased in males, especially those with a mandibular angle of less than 120° on panoramic radiographs, and those with a non-splinted superstructure.

Implantes Dentales , Implantes Dentales/efectos adversos , Prótesis Dental de Soporte Implantado , Fracaso de la Restauración Dental , Estudios de Seguimiento , Humanos , Masculino , Mandíbula , Estudios Retrospectivos , Factores de Riesgo
Microbiol Immunol ; 52(2): 64-8, 2008 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-18380803


Gram-positive streptococcal mutans-like strains, but with clearly different colony formation than S. orisuis on Mitis Salivarius agar, were isolated from the pig oral cavity and identified by 16S rRNA sequencing, G+C content, DNA-DNA homology and extensive biochemical and serological testing. The phenotypic data showed that the strains were similar to S. orisuis except for susceptibility to bacitracin. DNA-DNA homology between the isolates and S. orisuis was 72~81%. However, serological data showed that they have a different sero-specific antigen from S. orisuis and other mutans streptococci. A new serotype, designated p, strains are classified in a serovar of S. orisuis, one of mutans streptococci.

Boca/microbiología , Streptococcus mutans/clasificación , Streptococcus mutans/aislamiento & purificación , Porcinos/microbiología , Animales , Antibacterianos/farmacología , Bacitracina/farmacología , Técnicas de Tipificación Bacteriana , Composición de Base , ADN Bacteriano/química , ADN Bacteriano/genética , ADN Ribosómico/química , ADN Ribosómico/genética , Genes de ARNr , Datos de Secuencia Molecular , Hibridación de Ácido Nucleico , Filogenia , ARN Bacteriano/genética , ARN Ribosómico 16S/genética , Análisis de Secuencia de ADN , Homología de Secuencia de Ácido Nucleico , Serotipificación