To analyze stress distribution on anterior teeth apex, and their surrounding structures during maxillary anterior retraction using continuous archwire with various miniscrew vertical positions and various height of the anterior retraction hook (ARH). Six 3D maxillary models were constructed from a dry skull and the original objects of brackets, miniscrews, ARH, and archwire. The length of ARH (short / 2 mm, long / 5 mm) and the miniscrew vertical position (3 mm, 5 mm, 8 mm as measured from CEJ) were varied to change the force application direction. Simulations were undertaken using ANSYS 15.0 (ANSYS Inc., USA) by applying 150 gram retraction force. Maximum principle (MaxPS), minimum principle (MinPS) and von Mises (vonMS) stresses were evaluated on each Region of Interest (ROI) visually and numerically. The stress pattern between short and long ARH were almost similar, except on alveolar bone around the anterior teeth. The difference of ARH length showed statistically significant stress differences on anterior teeth apex and its surroundings. Meanwhile, miniscrew and its surroundings showed opposite results. The highest stress can be observed at the cervical of anterior teeth apex. Equal amount of stress also can be found at the surrounding structures around them.
|Number of pages||8|
|Journal||Journal of International Dental and Medical Research|
|Publication status||Published - 1 Jan 2018|
- Finite Element