COMPARATIVE EVALUATION OF PRIMARY STABILITY OF SELF- DRILLING ORTHODONTIC TITANIUM MINI IMPLANTS FROM JJ ORTHODONTICS INSERTED IN POLYURETHANE BONE BLOCK AT DIFFERENT INSERTION ANGLES USING PULL OUT TEST - AN IN VITRO STUDY

Authors: Leena Subhash Patil, Sheetal Potnis, AbdulRehman Irfan Foujdar, Chaitali Purushottam Rekhate, Sameer Patil

DOI: 10.18231/j.jds.10122.1145163480

Keywords: Mini-Implant, Insertion Angle, Pull-Out Test, Polyurethane Block, Orthodontics, Anchorage

Abstract: Objective- To evaluate and comparing the primary stability of self-drilling orthodontic titanium mini-implants from JJ Orthodontics inserted in polyurethane bone blocks at different insertion angles using a pull-out test Material & Methods- A total of 24 newly purchased (1.6 x 8 mm) orthodontic titanium mini-implants were obtained and inserted in polyurethane foam bone blocks simulating cortical and cancellous bone layers having density of 50 PCF and 40 PCF respectively with help of implant driver manually. Each specimen was tested for pull-out strength using the Universal Testing Machine with a loading speed of 1 mm/min. Results- The mean distribution of Pull out Strength for JJ orthodontics inserted in polyurethane bone block at 900 and 600 was 98.50 ± 12.10 and 141.19 ± 12.92 respectively. A high statistically significant difference was observed in pull out strength between JJ Orthodontics at 600 and 900 angle (P<0.001). Conclusion- The pull-out strength at 600 is greater than 900, thus insertion angle plays an important role in the primary stability of the mini implant.