AUTHOR(S): Dr. Ruchira Shreevats, Dr. Prashanth CS, Dr. Amarnath BC and Dr. Akshai Shetty

ABSTRACT:The design of an appliance for en-masse anterior tooth retraction using mini implants as anchorage with varying anterior retraction hook and varying alveolar bone height situations in adult patients for bodily tooth movements using Finite element analysis (FEA) to determine the best combination of above factors. A mini implant of diameter 1.2mm and length 8mm was placed in between the maxillary 2nd premolar and 1st molar root with working wires as 0.019X.025 inch stainless steel wire in 0.022inch slot and 0.017x0.025inch stainless steel wire in 0.018 inch slot & anterior retraction hook (ARH) soldered between lateral incisor and canine with varying alveolar bone height situations of 100%, 75% and 50% along with the varying retraction hook uptil 10mm. Conclusion is that bodily tooth movement differs with varying retraction hook on both base archwires with varying alveolar bone height.

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