Secondary caries & local factors related to its development

• Ano de defesa: 2018
• Autor(a) principal: Maske, Tamires Timm
• Orientador(a): Cenci, Maximiliano Sérgio
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Pelotas
• Programa de Pós-Graduação: Programa de Pós-Graduação em Odontologia
• Departamento: Faculdade de Odontologia
• País: Brasil
• Palavras-chave em Português: Secondary caries; Wall lesion; Biofilm; Mmp
• Área do conhecimento CNPq: CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA
• Link de acesso: http://guaiaca.ufpel.edu.br/handle/prefix/4672

Objectives: This in situ study aimed to investigate the influence of very small gaps in SC development and additionally to link the level of SC and a threshold gap size with the caries activity level of the volunteer. Methods: For 21 days, 15 volunteers wore a modified occlusal splint loaded with dentin-composite samples restored according to different interface conditions: bonded (B = samples restored with complete adhesive procedure), no-bonded (NB = restored with composite resin without adhesive procedure), and 30, 60 and 90 µm (no adhesive procedure and with intentional gap). Eight times per day, the splint with samples was dipped in a 20% sucrose solution for 10 minutes. Before and after caries development, samples were imaged with T-WIM and lesion depth and mineral loss were calculated. Volunteers were grouped according to the average wall lesion depth and classified as high, mid and low caries activity levels. Results: No wall lesion formation was observed in B and NB groups. In general, intentional gaps led to SC lesion depth progression independent of caries activity level of volunteers. No substantial wall lesions were found for two volunteers. A trend for deeper lesion in larger gaps was observed for the high activity group. Conclusion: Very small gaps around or wider than 30 µm develop SC independent of the caries activity level of the patient and SC wall lesion progression seemed to be related to individual factors even in this standardized in situ model.