Evaluation of space closure rate, tipping and rotation of canine during it's retraction with sliding mechanics(An In vitro study)

Obaidi, Hussain Ai; Saeed, Yonis M

doi:10.33899/rden.2005.163262

	Evaluation of space closure rate, tipping and rotation of canine during it's retraction with sliding mechanics(An In vitro study)
Al-Rafidain Dental Journal
Article 8, Volume 6, Issue 3, 2006, Pages 64-70 PDF (782.9 K)
Document Type: Research Paper
DOI: 10.33899/rden.2005.163262
Authors
Hussain Ai Obaidi; Yonis M Saeed
Abstract
Aim: To evaluate of the effects of using different methods of elastic chain attachment, different shapes of base arch wire (round and rectangular) and different ligation techniques on the rate of space closure, degree of tipping and degree of rotation of canine during translatory displacement of canine's bracket via wire using Typodont simulation system. Materials and Methods: Typodont teeth situated in well–aligned position, The criteria of the subject are covered and immobilized by the acrylic bite except canine; Elastic chain exerting 180gm of force on canine measured carefully by Tension Gauge; The available space was (14 mm) measured by digital vernia; The angle between bite plane extension bar and canine extension bar were (90) measured by protractor directly on a photograghs that were taken for Typodont using digital camera from both vertical and horizontal direction. The data were subjected to the statistical analysis at P≤ 0.05 significant level. Results: Canine sliding over rectangular arch wire gave rise to significant decrease in degree of tipping and rotation with significant reduction in rate of space closure, Second, stainless steel ligature and elastomeric ties of conventional ligation technique gave rise to a significant decrease in the degree of tipping and rotation with significant reduction in rate of space closure, elastic chain onto hook of canine bracket, gave rise to significant decrease of tipping and rotational degree with significant increase in rate of space closure. Conclusions: the methods in which elastic chain is attached to canine's hook using rectangular wire with elastomeric ties and the elastic chain is attached to canine's hook using rectangular wire with stainless steel ligature are favorable affecting canine sliding, where both were produced significantly the lowest degree of tipping and rotation with satisfactory rate of space closure.
Keywords
canine retraction; sliding mechanics

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