Sangeetha, M G (2015) Comparative study of rate of retraction and molar control between Dual Dimensional wires and Rectangular wires during retraction, using Miniscrews. Masters thesis, Tamilnadu Government Dental College and Hospital, Chennai.
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Abstract
INTRODUCTION: Conventional rectangular wires used for retraction of anteriors in premolar extraction cases, causes increased resistance to sliding due to various factors like stiffness friction, binding etc., thereby increases the treatment time and also puts a strain on the molars due to the reciprocating forces of retraction. Dual Dimensional wire has been used in this study to reduce the resistance and allow easy sliding of the archwire during retraction, along with good control of molars with the help of miniscrews as direct anchorage. AIM AND OBJECTIVES: To study the rate of space closure and molar control between Dual Dimensional wire and Rectangular wire during retraction using miniscrews. To compare the rate of space closure and molar control between the above two wires. MATERIALS AND METHODS: Sixteen patients, chosen in the age group of 17-25,who fulfilled the inclusion and exclusion criteria were segregated as Group A and B, for Dual Dimensional wire and conventional Rectangular wire respectively. Models, Cephalograms were taken before and after the study period (4 months).Clinical procedure involved placing the microimplants and the wires in the respective groups followed by retraction with NiTi coil springs, attached between the implant head and S hook fixed mesial to canine. At the end of study period, results were analysed using SPSS software. RESULTS: The results showed significant difference in the amount of space closure between Dual Dimensional wire and rectangular group with 0.7 mm more in the DDW group, in the given study period. The mean change in the amount of space closure was 4.01mm and 3.31 mm in DDW and Rectangular wire group respectively. Mesial tangent on the right molars showed marginal significance (0.049). Minor changes were observed in the position of molars in both the groups with more changes in the Rectangular wire, though the changes were statistically insignificant. CONCLUSION: In the era of low friction systems and Microimplant, it becomes prudent to choose Dual Dimensional wire over conventional wire for smooth and easy sliding of archwire during retraction, when miniscrews act as anchorage provider, to control the molars, and hence faster tooth movement leading to reduced retraction time for space closure, in orthodontic treatments.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Dual Dimensional wire ; rectangular wire ; NiTi coil spring ; microscrews, hooks. |
| Subjects: | DENTAL > Orthodontics and Dentofacial Orthopedics |
| Depositing User: | Subramani R |
| Date Deposited: | 14 Oct 2018 19:23 |
| Last Modified: | 14 Oct 2018 19:23 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/9891 |
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