Importance of Angulation of Micro-Implants in Various Growth Pattern Patients -An Original Research

Abstract

Aim: We aimed to evaluate the associations between craniofacial growth pattern with interradicular distances (IRDs), cortical widths (CWs), and jaw heights (JHs) and angulation of mini-implants. Methodology: Cone-beam computerized-tomography data pertaining to 60 Class-I patients were divided into 3 growth groups: normal, horizontal, and vertical. IRDs and CWs were measured for bimaxillary canines to second molars, on buccal and lingual sides, at three transverse planes (1, 3, and 5 mm apically to the alveolar crest). JHs were measured in both jaws, between canines and second molars. The role of growth patterns and other variables were analyzed; also safe zones were mapped with statistical substantiation. With the help of stent and a drill, The angulation of placement of the mini-implant was at 70° to the long axis of the tooth. Results: IRDs were greater in the mandible, males, at points more distant from the ridge crest, and on the lingual side. Cortexes were thicker in the horizontal growth pattern, mandible, males, older patients, and lingual sides. JHs were greater in vertical growth pattern, mandible, and males. The cone beam computed tomography image showed the mini-implant at an angle of 70° to the long axis of the tooth. Conclusion: Cortex might be thicker in patients with a horizontal growth pattern. Height might be greater in vertical growth pattern. Interradicular distances might not be affected by growth pattern.