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Korean J Orthod
Published online December 9, 2020
Copyright © The Korean Association of Orthodontists.
Tugba Haliloglu Ozkana 
; Selim Arici b
a DDS PhD, Department of Oral and Dental Health Program, Üsküdar University, İstanbul, TURKEY Orchid ID: 0000-0003-1180-8534 (First and corresponding author)
b Professor, Department of Orthodontics, Faculty of Dentistry, Ondokuz Mayıs University, Atakum, Samsun, TURKEY Orchid ID: 0000-0001-8890-2065 Phone: +90 532 436 79 23 e-mail: sarici@omu.edu.tr
Correspondence to:Address correspondence to:
Tuğba Haliloğlu Özkan, DDS PhD
Department of Oral and Dental Health Program, Üsküdar University, İstanbul, TURKEY
Phone: +90 505 598 80 28
e-mail: dttuuba@gmail.com
All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest, and none were reported.
Acknowledgement: We are grateful to Dr. Enes Özkan for editing the manuscript.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Introduction: This study aimed to identify the clinical effectiveness of two different penetration depths of micro-osteoperforations (MOPs) on the rate of orthodontic tooth movement.
Methods: Twenty four patients having a Class I or Class II malocclusion requiring the removal of upper first premolar teeth were selected. The patients were randomly divided into 2 groups: (1) the control group–received no MOPs; and (2) the experimental groups–three MOPs at 4 mm (MOP-4) and 7 mm (MOP-7) depths were randomly and equally performed to either the left or right sides distal to the canine. The retraction amount was measured on 3D digital models at the 28th day of retraction. Also, MOP related pain was measured using a Visual analog scale (VAS). The statistical difference between the groups was determined using an independent t-test for VAS; and ANOVA and post-hoc Tukey test for canine retraction.
Results: No significantly difference was found between the MOP-4 (1.22±0.9 mm/month) and MOP-7 (1.29±0.31 mm/month) groups in terms of the canine retraction rate. Both MOP-4 and MOP-7 groups demonstrated a significantly higher canine movement than the control (0.88±0.19 mm/month). MOPs did not affect the mesialization of the posterior teeth significantly (p>0.05). Pain scores of both MOP-4 and MOP-7 groups were similar and no statistically significant difference was found.
Conclusion: Three MOPs with a depth of 4 mm can be performed as an effective method to increase the rate of tooth movement. Three MOPs with a depth of 4 to 7 mm do not enhance tooth movement even more.
Keywords: orthodontic mini-implant, tooth movement
Korean J Orthod
Published online December 9, 2020
Copyright © The Korean Association of Orthodontists.
Tugba Haliloglu Ozkana ; Selim Arici b
a DDS PhD, Department of Oral and Dental Health Program, Üsküdar University, İstanbul, TURKEY Orchid ID: 0000-0003-1180-8534 (First and corresponding author)
b Professor, Department of Orthodontics, Faculty of Dentistry, Ondokuz Mayıs University, Atakum, Samsun, TURKEY Orchid ID: 0000-0001-8890-2065 Phone: +90 532 436 79 23 e-mail: sarici@omu.edu.tr
Correspondence to:Address correspondence to:
Tuğba Haliloğlu Özkan, DDS PhD
Department of Oral and Dental Health Program, Üsküdar University, İstanbul, TURKEY
Phone: +90 505 598 80 28
e-mail: dttuuba@gmail.com
All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest, and none were reported.
Acknowledgement: We are grateful to Dr. Enes Özkan for editing the manuscript.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Introduction: This study aimed to identify the clinical effectiveness of two different penetration depths of micro-osteoperforations (MOPs) on the rate of orthodontic tooth movement.
Methods: Twenty four patients having a Class I or Class II malocclusion requiring the removal of upper first premolar teeth were selected. The patients were randomly divided into 2 groups: (1) the control group–received no MOPs; and (2) the experimental groups–three MOPs at 4 mm (MOP-4) and 7 mm (MOP-7) depths were randomly and equally performed to either the left or right sides distal to the canine. The retraction amount was measured on 3D digital models at the 28th day of retraction. Also, MOP related pain was measured using a Visual analog scale (VAS). The statistical difference between the groups was determined using an independent t-test for VAS; and ANOVA and post-hoc Tukey test for canine retraction.
Results: No significantly difference was found between the MOP-4 (1.22±0.9 mm/month) and MOP-7 (1.29±0.31 mm/month) groups in terms of the canine retraction rate. Both MOP-4 and MOP-7 groups demonstrated a significantly higher canine movement than the control (0.88±0.19 mm/month). MOPs did not affect the mesialization of the posterior teeth significantly (p>0.05). Pain scores of both MOP-4 and MOP-7 groups were similar and no statistically significant difference was found.
Conclusion: Three MOPs with a depth of 4 mm can be performed as an effective method to increase the rate of tooth movement. Three MOPs with a depth of 4 to 7 mm do not enhance tooth movement even more.
Keywords: orthodontic mini-implant, tooth movement
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