Retraction Mechanics: A Review
نویسندگان
چکیده
Extraction space closure is an integral part of orthodontic treatment which demands a thorough understanding of the biomechanics which leads to a better ability to decide on the anchorage and treatment options and prognosis of various alternatives. In the pre-adjusted edgewise technique, retraction is achieved either with friction (sliding) or frictionless mechanics. Sliding mechanics involves, moving of the teeth along an arch wire through brackets and tubes. Segmental mechanics involves, closing fabricated loops either in a full or sectional arch wire. Both the mechanics have their own merits and demerits. This article consolidates the basic information regarding the loop and sliding mechanics, their merits and demerits and also retraction with implants, their importance and application in contemporary practice.
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