Efficient Contributions Proportion of the Molar Under Sequential Distalization with Clear Aligners and Micro-Implant Anchorage-Finite Element Research

Abstract

Introduction The purpose of this work is to examine the biomechanical impacts of molar distalization anchorage reinforcement utilising clear aligners (CAs) with microimplants. further looks at possible therapeutic approaches to improve anchoring throughout the progressive distalization phase. Methodology: In order to simulate the CAs, microimplants, alveolar bone, periodontal ligament (PDL), and upper teeth, finite element models were created. In group I, the second molars moved 0.25 mm in a distal direction, whereas in group II, the first molars moved 0.25 mm in a distal direction after the second molars were positioned in a target location. Three models made up each group set: Model A was the control model, Model B represented the use of microimplants that were affixed to the aligner using precise incisions, and Model C represented the usage of microimplants attached by buttons. Results In the absence of anchoring reinforcement, the distalization of the second molars accounted for only 52.86% of the 0.25-mm step distance. The mesial movement of the anchoring teeth and other undesirable movements were responsible for the remaining %. Models B and C demonstrated a reduced loss of anchoring and an enhanced effective contribution ratio of molar distaliation. On the other hand, there was a minor rise in the undesirable movement of molar rotation and tilting. Because of the reciprocal tension created by the distalization of the first molar, group II's second molar experienced a process known as mesial relapse. Moreover, the efficacy of molar distalization in terms of contribution ratio was found to be positively correlated with the magnitude of force applied. In cases where stronger anchorage reinforcement is required, precision cuts is the superior method. Conclusions- The utilization of microimplants in conjunction with CAs can facilitate the effective contribution ratio of molar distalization. However, it is important to note that complete elimination of anchorage loss is not achievable. To mitigate undesired movement, careful planning of anchorage preparation and overcorrection is recommended.