Assessment the retentive force and XRD analysis on the recycling esthetic thermoplastic acetal clasps

• Autor(a) principal: Zwwyer, Rasha Mohammed
• Data de Publicação: 2024
• Outros Autores: Mansoor, Nidhal Sahib
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Dental Science
• Texto Completo: https://ojs.ict.unesp.br/index.php/cob/article/view/4005

Objective: To reduce environmental biohazards, technicians should be educated with safe biological waste disposalprocedures and dental material recycling. The present study assesses the retentive force, deformation test and XRDanalysis of re-injection acetal resin clasps. Material and Methods: specimens were prepared for clasp retention testinjection according to the manufacture’s instruction for acetal resin. The first group represent control group with (100%New) and other five groups as experimental groups (group II (25% old +75% new), group III (50% old + 50%) new,and group IV (75% old + 25% new) with different percentages between new acetal materials and old acetal materials,while two last groups with several times (group V (100% old) and group VI (re-injection two times)) only used oldacetal materials. The X-ray diffraction (XRD) device used to give structural information for the materials to be tested.The study data were analyzed via One-way ANOVA (LSD) at a significant P-value of (p-<0.05) and a confidence level of95%. Results: After comparing the results, a significant improvement in the retentive force of acetal clasp specimens afterre-injection two times there was found high mean value in group re-injection two times and lower mean value recordedin control group. In XRD patterns of there was no diffraction peak refers to crystal structure of acetal resin. Conclusion:the present study findings concluded that the recycling of acetal resin enhanced the retentive force of acetal clasp andnot affected on the crystal structures of material. KEYWORDSAcetal clasp; Esthetic clasp; Recycling; Retentive force; XRD.