A retrospective study on incisor root resorption in patients treated with bracketless invisible appliance and straight wire appliance

doi:10.19439/j.sjos.2017.01.027

Abstract

Abstract: PURPOSE: To assess root resorptions in patients treated with bracketless invisible appliance and straight wire appliance using cone-beam CT (CBCT). METHODS: Twenty-eight patients treated with bracketless invisible appliance (as experimental group) or straight wire appliance (as control group) were randomly selected. CBCT images were analyzed at 3 time points (pre-operation, 6 month after operation, post-operation). Root resorption was calculated using root length at 3 time points. The difference between the 2 groups was analyzed with SPSS16.0 software package. To those teeth with no root length reduction, the bone defect was evaluated using CBCT. RESULTS: After 6-month of treatment, 47.3% teeth from the experimental group had root resorption, while 68.3% in the control group. There was significant difference between the 2 groups (P<0.05). Root absorption of maxillary central incisors from the 2 groups was more severe than other teeth (55% in the experimental group, and 75% in the control group). After orthodontic treatment, the incidence of root resorption in the control groups increased to be 85.3% and 68.3% in the experimental group (P<0.05). To those teeth with no root resorption, bone defect was more common in the palatal side (18% in the experimental group, 14% in the control group). CONCLUSIONS: Compared with straight wire appliance, patients using bracketless invisible appliance suffer from less root resorption.

Key words: Bracketless invisible appliance, Straight wire appliance, Root resorption

CLC Number:

R783.5

WANG Guan, YANG Lu, ZHANG Yu-feng, LUO San-lian, ZHENG Ji-wei. A retrospective study on incisor root resorption in patients treated with bracketless invisible appliance and straight wire appliance[J]. Shanghai Journal of Stomatology, 2017, 26(1): 121-124.

References

[1] Lund H, Gröndahl K, Hansen K, et al. Apical root resorption during orthodontic treatment? A prospective study using cone beam CT [J]. Angle Orthod, 2012, 82(3): 480-487.
[2] Apajalahti S, Peltola JS. Apical root resorption after orthodontic treatment-a retrospective study[J]. Eur J Orthod, 2007, 29(4): 408-412.
[3] Kuncio D, Maganzini A, Shelton C, et al. Invisalign and traditional orthodontic treatment postretention outcomes compared using the American Board of Orthodontics objective grading system [J]. Angle Orthod, 2007, 77(5): 864-869.
[4] Simon M, Keilig L, Schwarze J, et al. Treatment outcome and efficacy of an aligner technique-regarding incisor torque, premolar derotation and molar distalization [J]. BMC Oral Health, 2014, 14: 68.
[5] Djeu G, Shelton C, Maganzini A. Outcome assessment of Invisalign and traditional orthodontic treatment compared with the American Board of Orthodontics objective grading system [J]. Am J Orthod Dentofacial Orthop, 2005, 128(3): 292-298.
[6] Krieger E, Drechsler T, Schmidtmann I, et al. Apical root resorption during orthodontic treatment with aligners? A retrospective radiometric study [J]. Head Face Med, 2013, 9:21.
[7] Weltman B, Vig KW, Fields HW, et al. Root resorption associated with orthodontic tooth movement: a systematic review[J]. Am J Orthod Dentofacial Orthop, 2010, 137(4): 462-476.
[8] Iwasaki LR, Haack JE, Nickel JC, et al. Human tooth movement in response to continuous stress of low magnitude[J]. Am J Orthod Dentofacial Orthop, 2000, 117(2): 175-183.
[9] Paquette DE. Clear aligner treatment [C]// Graber LW, Vanarsdall RL Jr, Vig KW. Orthodontics, current principles and techniques[M]. 5th Ed. Philadelphia: Elsevier Mosby, 2011: 639-688.
[10] Lund H, Gröndahl K, Gröndahl HG. Cone beam computed tomography for assessment of root length and marginal bone level during orthodontic treatment[J]. Angle Orthod, 2010, 80(3): 466-473.
[11] Durack C, Patel S, Davies J, et al. Diagnostic accuracy of small volume cone beam computed tomography and intraoral periapical radiography for the detection of simulated external inflammatory root resorption [J]. Int Endod J, 2011, 44(2): 136-147.
[12] Sherrard JF, Rossouw PE, Benson BW, et al. Accuracy and reliability of tooth and root lengths measured on cone-beam computed tomographs [J]. Am J Orthod Dentofacial Orthop, 2010, 137(4 Suppl): S100-108.