Closing Loops; Geometry and Mechanical Properties: A Review

Introduction: To verify the literature concerning mechanical properties, measuring methods and resultant force system developed by closing loops (CL). The effectiveness of a certain CL is related to its geometry nature wire material. obtain necessary performance must work in elastic range be geometrically configured express an adequate system, which result compensatory gable bends preactivation. It was performed search MEDLINE from 1974 2014 using for “orthodontic AND retraction springs” loops”. From 147 papers resulted Pubmed, 50 were chosen. Overall, many works seek not only improve knowledge about but also better understanding their behavior. FEM, Holographic Photoelastic studies, are tests commonly used before testing them experimentally. Wire material cross-section show great influence choice geometric variables because modulus elasticity (E), resiliency (R) moment inertia (I). Experimental should preceded numerical latter idealize particular setting, allows modifying variables.