Shamara Aysha, S (2020) Evaluation and Comparison of the total metal ion release between Stainless Steel Brackets and Ceramic Brackets with Metal Inserts in artificial saliva, at different pH levels: An In-Vitro study. Masters thesis, Sri Ramakrishna Dental College and Hospital, Coimbatore.
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Abstract
AIM OF THE STUDY: To evaluate and compare the total metal ion release between Stainless Steel brackets and Ceramic brackets with Metal Inserts in artificial saliva at different pH levels. An In-Vitro study. MATERIALS AND METHODOLOGY: The materials used in the study were: 1. Orthodontic Brackets: a) Stainless Steel milled brackets, b) Stainless Steel MIM brackets, c) Ceramic brackets with Metal Inserts. 2. Artificial saliva 3. Magnetic Stirrer 4. pH meter 5. Incubator 6. Hot plate 7. Atomic Absorption Spectrophotometer METHODOLOGY: The study consists of 3 Groups – A, B and C which are further divided into 3 sub-groups each, according to the pH levels 4, 7 and 8 respectively. A set of 11 brackets were immersed in each sub group of Group A, Group B and Group C, at different pH levels. The samples were incubated at 37 degree Celsius for up to 45 days. The samples were collected on each of the following days, 7th, 14th, 21st, 28th and 45th day. The amount of Nickel and chromium ions released from each sample, at different pH levels, at different time intervals were checked by using atomic absorption spectrophotometer. RESULTS: The results were analysed using Student t test analysis. Intragroup and intergroup findings were done. The Intra-group comparison, for all the 3 pH levels, at different time intervals, showed that the maximum amount of nickel and chromium ions released on the 7th day, followed by gradual decrease thereafter. The Intergroup comparison between Group A, Group B and Group C showed that the maximum amounts of Nickel and Chromium Ions were released from Group A. CONCLUSION: The results showed that milled brackets released more nickel and chromium ions when compared to MIM and Ceramic brackets with metal slots, thus proving the manufacturing process does have an influence on the metal ion release, though the amount of Metal Ions released were well below the hypersensitivity/toxicity level.
| Item Type: | Thesis (Masters) |
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| Additional Information: | 241719352 |
| Uncontrolled Keywords: | Metal Ions, Nickel, Chromium, MIM brackets, Milled brackets, Artificial saliva, Atomic absorption spectrophotometer, pH. |
| Subjects: | DENTAL > Orthodontics and Dentofacial Orthopedics |
| Depositing User: | Subramani R |
| Date Deposited: | 24 Feb 2021 11:32 |
| Last Modified: | 24 Feb 2021 13:57 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/14463 |
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