Comparison of anterior and posterior mini-implant-Assisted maxillary incisor intrusion: Root resorption and treatment efficiency

Abstract

Objective: To compare, through cone-beam computed tomography (CBCT), the root resorption and treatment efficiency of two different mini-implant-Assisted modalities in intruding the maxillary incisors. Materials and Methods: Thirty-Two adults who had deep bite and elongated maxillary incisors were randomly allocated to two groups: Anterior mini-implant group (AMG) and posterior miniimplant group (PMG). In the AMG, approximately 40 g of force was applied per side with elastic chains from mini-implants placed between the lateral incisors and canines and in the PMG, with beta-Titanium wires from mini-implants placed between the second premolars and first molars. This study was conducted on CBCT scans taken before intrusion and after 4 months of intrusion. Data were analyzed by means of a paired t-Test, independent t-Test, and Pearson's correlation test. Results: One patient was excluded from the AMG due to mini-implant loosening. While the incisors showed a significant reduction in length and volume, this amount was greater in the AMG, especially in the central incisors (P