RESUMO
PURPOSE: The purpose of this clinical evaluation was to assess the clinical effect of application of everStick Ortho glass fiber-reinforced composites for orthodontic lingual retainer. METHODS: A total of 12 patients underwent orthodontic treatment using glass fiber-reinforced composites for fixed orthodontic lingual retainers. During a 24-month follow-up period after application of retainers, the condition of lingual retainers and the periodontal status were examined every 6 months. Gingival index and sulcus bleeding index were analyzed by nonparametric tests with SPSS 13.0 software package. RESULTS: During 24-month follow-up period, 11 orthodontic lingual retainers were stable without fracture while the periodontal tissue revealed no significant changes in all 12 patients. CONCLUSIONS: The application of everStick Ortho glass fiber-reinforced composites for orthodontic lingual retainer is a viable alternative to conventional retainer used in orthodontic treatment.
Assuntos
Contenções Ortodônticas , Índice Periodontal , Resinas Compostas , Vidro , HumanosRESUMO
PURPOSE: To observe the tooth surface after acid etching and removing of bonding adhesive by two means for polishing. METHODS: Thirty extracted premolars for orthodontic purpose were used in this experiment. The brackets were adhered and debonded. Then the premolars were randomly divided into two groups. They were treated by traditional method and silicone particles, and observed by roughness instrument and scanning electronic microscope. The polishing-time and surface roughness value(Ra) were recorded. SPSS13.0 software package was used for paired t test. RESULTS: There was no significant difference in Ra and polishing-time between the two groups (P>0.05). Under SEM, the scratches on tooth surface polished by silicone particles were shallower and thinner. CONCLUSION: The silicone particles could provide good requirement for tooth polishing after bracket debonding clinically.