Sriman Vishnu, E (2022) Enamel Deproteinization as an Effective Bond Survival Rate Enhancer of Orthodontic Brackets Bonded with Conventional Composites: A Split Mouth Randomised Clinical Trial. Masters thesis, Chettinad Dental College and Research Institute, Kanchipuram.
Full text not available from this repository.Abstract
AIM OF THE STUDY: To evaluate clinically the role of enamel deproteinization with 5.25% sodium hypochlorite on the survival rate of orthodontic brackets during the leveling and aligning stage of fixed appliance therapy. MATERIALS AND METHODS: A total of 20 patients with complete permanent dentition in the age group of 15- 30 years were included in this study with a variety of malocclusions that required fixed orthodontic treatment for both the maxillary and mandibular dentition . Group A (Right upper and Right lower quadrant) - The enamel surface is etched with 37% phosphoric acid and the brackets were bonded with Transbond XT without enamel deproteinization (Total number of brackets 190) Group B (Left upper and Left lower quadrant) – The enamel surface is pretreated with 5.25% sodium Hypochlorite prior to acid etching with 37% Phosphoric acid and the brackets are bonded with Transbond XT. (Total number of brackets – 190) The follow-up and assessment of bond failure rate of the brackets was done for a period of 6 months till the end of leveling and aligning. Pearson’s Chi square test is used to assess the bracket failure rate. P value was predetermined at ≤ 0.05. RESULTS: During the 6-month observation period a total of 18 (4.7%) brackets failed, of which 4 (2.1%) brackets were debonded in the experimental group (Enamel deproteinization with 5.25% Sodium hypochlorite prior to acid etching + Transbond XT) and 14 (7.4%) bracket failure was observed in the control group (Acid etching +Transbond XT) group which was statistically significant (p=0.016). The maxillary arches had 8 debonded brackets (4.2% failure rate), and the mandibular arches had 10 debonded brackets (5.3% failure rate) which were not statistically significant (p = 0.629). Posterior brackets (premolars) showed more bracket failures (7.8%) failure rates than anterior brackets (2.9%). The Pearson Chi square test showed no significant differences between anterior and posterior brackets in terms of survival rate (P=0.334). CONCLUSION: The application of 5.25% sodium hypochlorite prior to bonding orthodontic brackets with the Transbond XT increases the bracket survival rate of orthodontic brackets. Enamel deproteinization with 5.25% sodium hypochlorite prior to etching with 37% phosphoric acid can be preferred to increase the bond survival rate of orthodontic bracket during the course of orthodontic treatment.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | 241919703 |
| Uncontrolled Keywords: | Enamel Deproteinization, Sodium hypochlorite, Bracket survival rate. |
| Subjects: | DENTAL > Orthodontics and Dentofacial Orthopedics |
| Depositing User: | Subramani R |
| Date Deposited: | 08 May 2022 10:09 |
| Last Modified: | 14 May 2022 03:43 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/19807 |
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