Abstract
Aim: The aim of this study was to investigate the degree of external apical root resorption (EARR) following En-masse retraction (EM) and compared it to two steps retraction technique (TS) using friction mechanics.
Materials and Methods: Thirty adult female with maxillary protrusion were randomly allocated by a computer sequence generator with 1:1 allocation ratio. EM group (mean age = 17.7 ± 1.89 years) and TS group (mean age = 17.7 ± 1.77 years). Mini-screws were inserted followed by first premolars extraction then randomization was accomplished. Patients received treatment with either EM procedure or TS to close the extraction spaces after alignment and leveling with the same pre-adjusted fixed appliances. Pre- and post treatment CBCT images of both groups was used to evaluate the EARR from (T0) start of retraction till end of space closure (T1).
Results: The data of 20 patients (10 in EM group and 10 in TS group) were analyzed. EARR was detected in both groups with more root resorption in EM group by total average decrease in root length by -1.14 mm while in TS group by -0.66 mm as an average decrease in root length.
Conclusion: The difference in EARR between the study groups was statistically significant. The highest RR values were found in TS group to be -1.01 mm in upper left central (UL1), while the greatest RR in EM group to be -1.5 mm in upper left canine (UL3).
Recommended Citation
El Ashwal AA, Dehis hM, Eid F. Assessment of external apical root resorption following En-masse and two steps retraction in maxillary protrusion cases: A randomized controlled clinical trial. Future Dental Journal. 2024; 9(2):103-109. doi: https://doi.org/10.54623/fdj.9026.
DOI
https://doi.org/10.54623/fdj.9026