Page 144 - FINAL COMPENDIUM 2020-2021 27.2.2022

EFFECT OF MICRO-OSTEOPERFORATIONS ON EXTERNAL APICAL ROOT RESORPTION: A
RANDOMIZED CONTROLLED TRIAL

Shahrin AA, Ghani SH, Norman NH
Objective: To investigate the effect of micro-osteoperforations (MOPs) on external apical
root resorption (EARR) during the initial orthodontic alignment phase of maxillary anterior
crowding. Materials and methods: Thirty patients (25 females, 5 males; mean age, 22.66
± 3.27 years) who presented with moderate crowding of the upper labial segment and
underwent extraction-based fixed appliance treatment were recruited. They were
randomly allocated to receive adjunctive therapy with MOPs (n = 15) or treatment with
fixed appliances only (control group; n = 15). EARR was measured from long-cone
periapical radiographs taken at the start and the sixth month of treatment. A correction
factor for the enlargement difference was used to calculate EARR. Data were analysed
with descriptive statistics and repeated-measures analysis of variance. Results: The mean
root lengths of 168 teeth were measured and showed no statistically significant difference
(p > 0.05) after six months of fixed appliance treatment in the MOP (mean difference [MD]
= 0.13 mm; 95% confidence interval [CI] = −0.10–0.35) and control group (MD = 0.14 mm;
95% CI = −0.10–0.37). Most of the roots in the MOP and control groups (42.86% and
52.38%, respectively) showed only mild resorption. Less than 8% of the roots in both
groups (7.14% in the MOP group and 4.76% in the control group) showed moderate
resorption. Conclusions: Acceleration of orthodontic tooth movement with adjunctive
MOPs therapy during the alignment phase does not exacerbate EARR in patients with
moderate crowding of the upper labial segment in comparison with controls.

Keywords: Micro-osteoperforations, External apical root resorption, Orthodontic alignment,
Iatrogenic effect
Published in Korean journal of orthodontics. 2021 Mar 25;51(2):86-94

Azaitun Akma Shahrin
Orthodontic Dental Clinic
Taiping, Perak

Sarah Haniza Abdul Ghani
Noraina Hafizan Norman
Centre of Paediatric Dentistry and Orthodontic Studies
Faculty of Dentistry
Universiti Teknologi MARA
Sungai Buloh, Malaysia

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