Contrast Study On Clinical Tast Of Two Kinds Of Transfer Trays In Lingual Bracket Bonding

Background:Precisely placement of bracket and bonding is essential part of Lingual Orthodontics treatment. It high degree of accuracy that can't be achieved with lingual bracket positioning by direct bonding because difficulty of directly viewing and the wide anatomical variation of the lingual surfaces of the teeth. So Only then uses the indirect bonding method can be precisely placement of bracket。Indirect bonding techniques include the TARG system,the CLASS system and the Hiro system etc….interiorly , indirect bonding technique in common use The brackets are positioned and placed on the set-up model with the help of a full-sized rigid rectangular archwire. The individually transfer trays for each bracket are made transparency self-curing denture acrylic. It use ligature wire to hold the tray and bracket together. It will consuming more time and Process more complex. In this task, The Improvement transfer trays be made in hard- thermoforming material and Light Cure Resin Adhesive and needn't ligature wire. It will reduce chairside time and Precise positioning of bracket. This article contrast study on clinical tests of two kinds of transfer trays , Seeks one kind of fast, simple and accurate lingual bracket individually transfer trays to provide the reference.Objective:1,Seeks one kind of simple and accurate lingual bracket individually transfer trays.2,To compare rate of accuracy of the improvement transfer trays and the self-curing denture acrylic transfer trays to bonding lingual bracket.3,To compare with rate of bracket losing to use the improvement transfer trays and the self-curing denture acrylic transfer trays to bonding lingual bracketMethods:1,Selects 6 examples non-extraction lingual orthodontics treatment patient. Altogether 144 teeth, each tooth to bonding lingual bracket 3 times. Each time is separated for 1 week. Total 432 times. 6 example patients random divide into two groups, each group of 3 example. A group is the improvement transfer trays group ,and B group is the self-curing denture acrylic transfer trays group.2,A,B groups malocclusion model first on tooth-arrangement test. Then distinction make the improvement transfer trays and the self-curing denture acrylic transfer trays. Simultaneously, Surveys and records vertical dimension from the basement of each bracket to middle point of anterior teeth Margin,tongue tip of premolar,lingual sulcus of molar.3,After Complete scaling,37% phosphoric acid etching lingual surface of tooth 20s,water vapor washing 10s,drying,and put cotton-roll. Distinction uses two kind of trays and 3M Transband XTTM light-cured resin adhesive to bonding lingual bracket. Surveys and records vertical dimension from the basement of each bracket to middle point of anterior teeth Margin,tongue tip of premolar,lingual sulcus of molar. Archwire ligation and Soft food and liquid food in the 72 hours.observes and records losing Situation of bracket.(Counting including bracket losing in bonding .) Finally, all data statistics analysis.4,We removing archwire,bracket and cleaning it. Patient be order to return visit after a week and repeat above step.Results:1,A group making and the clinical practice aspect has certain superiority.2,In two group of date, The different rate of accuracy of bonding lingual bracket Without statistics significance.3,The rate of bracket losing of two groups that To bonding of lingual bracket in 72 hours Without statistics significance.Conclusion:1,The improvement transfer trays making and the clinical practice aspect has certain superiority.2,The accuracy of bonding lingual bracket of the improvement transfer trays and the self-curing denture acrylic transfer trays result similar.3,Use the improvement transfer trays and the self-curing denture acrylic transfer trays to bonding of lingual bracket 72 hours later, bracket losing result similar.