Effects of Denture Cleansing Solutions on Different Materials Used for Fabrication of Polymer Attachment Components

Author(s)

Sanches Mariotto, Ligia Gabrielle ^[1] ; da Costa Valente, Mariana Lima ^[2] ; de Castro, Denise Tornavoi ^[3] ; dos Reis, Andrea Candido ^[2]

Affiliation

^[1] Univ Sao Paulo, Med Sch, Clin Hosp, Oral & Maxillofacial Surg & Traumatol, Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Sch Dent Ribeirao Preto, Dept Dent Mat & Prosthodont, Ribeirao Preto - Brazil

^[3] Sch Dent Uberaba, Dept Biomat, Uberaba, MG - Brazil

• Document type: Journal article
• Source: International Journal of Prosthodontics; v. 33, n. 1, p. 74-80, JAN-FEB 2020.
• Web of Science Citations: 0

Abstract

Aims: To evaluate the effects of different cleansing solutions on the physical-mechanical properties (roughness, surface hardness, and fatigue resistance) of three polymeric materials used to manufacture retentive attachments for overdentures. Materials and Methods: The roughness and surface hardness analyses each employed 150 specimens measuring O 9 mm x 2 mm in thickness (polyacetal, polytetrafluoroethylene {[}PTFE], and polyethylene terephthalate {[}PET]; n = 50 each). For fatigue resistance analysis, 180 retentive attachments measuring 4 mm x 3 mm in height (n = 60 each) were used. The properties were evaluated before and after immersion in different cleansing solutions: distilled water, alkaline peroxide, 0.5% sodium hypochlorite (NaOCl), and Listerine. After the data distribution was verified using Shapiro-Wilk test, parametric or nonparametric analysis was applied (alpha =.05). Results: The use of NaOCl caused a significant alteration in the roughness of the materials (P =.011), with a reduction in roughness in polyacetal and an increase in PTFE. The type of solution also influenced the surface hardness (P =.036); with the exception of distilled water, the other solutions promoted increased hardness. During the 24-month period, immersion in water, peroxide, and NaOCl (0.5%) caused increased fatigue resistance (P <.05) of the PET attachments. The immersion protocol resulted in greater fatigue resistance (P <.05) in polyacetal, while PTFE was not affected (P >.05). Conclusion: Regarding the physical-mechanical properties evaluated, the polymers PET, polyacetal, and PTFE were susceptible to cleansing solutions. (AU)

• FAPESP's process: 16/23569-7 - Physical-chemical and mechanical properties of attachments submitted to denture cleansing solutions
• Grantee: Lígia Gabrielle Sanches Mariotto
• Support Opportunities: Scholarships in Brazil - Scientific Initiation