Effects of orthodontic force on root surface damage caused by contact with temporary anchorage devices and on the repair process
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Objective: This study aimed to evaluate the effects of force loading on root damage caused by contact with temporary anchorage devices (TADs) during orthodontic treatment and to examine the repair process 4, 8, and 12 weeks after TAD contact by micro-computed tomography (CT). Methods: We enrolled 42 volunteers who required bilateral upper first premolar extractions. The experimental study design was as follows. For both first premolars, cantilever springs were placed, and then TADs were immediately inserted between the premolars of all volunteers. According to the removal order of the appliances, the participants were divided into the TAD group (Group T: n = 21, only TAD removal) and the spring group (Group S: n = 21, only spring removal). A splitmouth design was adopted in both groups as follows. For each volunteer, the left premolars were extracted 4, 8, or 12 weeks after TAD–root contact. The right premolars were extracted immediately after contact in both groups (Groups T-C and S-C) and used as positive controls. Resorption volumes and numbers of craters were determined by micro-CT. Results: The numbers of resorption craters were higher in Group T than in Group S at 8 and 12 weeks (p < 0.01). Crater volumes were higher in Group T than in Group S at 4 and 12 weeks (p < 0.01, both). Conclusions: Root injury was not completely repaired 12 weeks after root–TAD contact, even when the TADs were removed in cases of continuous force application.
Abstract
Objective: This study aimed to evaluate the effects of force loading on root damage caused by contact with temporary anchorage devices (TADs) during orthodontic treatment and to examine the repair process 4, 8, and 12 weeks after TAD contact by micro-computed tomography (CT). Methods: We enrolled 42 volunteers who required bilateral upper first premolar extractions. The experimental study design was as follows. For both first premolars, cantilever springs were placed, and then TADs were immediately inserted between the premolars of all volunteers. According to the removal order of the appliances, the participants were divided into the TAD group (Group T: n = 21, only TAD removal) and the spring group (Group S: n = 21, only spring removal). A splitmouth design was adopted in both groups as follows. For each volunteer, the left premolars were extracted 4, 8, or 12 weeks after TAD–root contact. The right premolars were extracted immediately after contact in both groups (Groups T-C and S-C) and used as positive controls. Resorption volumes and numbers of craters were determined by micro-CT. Results: The numbers of resorption craters were higher in Group T than in Group S at 8 and 12 weeks (p < 0.01). Crater volumes were higher in Group T than in Group S at 4 and 12 weeks (p < 0.01, both). Conclusions: Root injury was not completely repaired 12 weeks after root–TAD contact, even when the TADs were removed in cases of continuous force application.
참고문헌 (27)
- Papadopoulos MA, "The use of miniscrew implants for temporary skeletal anchorage in orthodontics : a comprehensive review", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 103, pp.6~15 (2007)
- Alves M Jr, "Root repair after contact with mini-implants : systematic review of the literature", Eur J Orthod, 35, pp.491~499 (2013)
- Cakir E, "Treatment of Class II malocclusion with mandibular skeletal anchorage", Am J Orthod Dentofacial Orthop, 151, pp.1169~1177 (2017)
- Reynders RM, "Barriers and facilitators to the implementation of orthodontic mini implants in clinical practice : a systematic review", Syst Rev, 5, pp.181~ (2016)
- Kim JK, "Applications of orthodontic mini implants" (2007), Quintessence Publishing Company
- Kravitz ND, "Risks and complications of orthodontic miniscrews", Am J Orthod Dentofacial Orthop, 131, pp.43~51 (2007)
- Liou EJ, "Do miniscrews remain stationary under orthodontic forces", Am J Orthod Dentofacial Orthop, 126, pp.42~47 (2004)
- Kadioglu O, "Contact damage to root surfaces of premolars touching miniscrews during orthodontic treatment", Am J Orthod Dentofacial Orthop, 134, pp.353~360 (2008)
- Maino BG, "Root damage and repair after contact with miniscrews", J Clin Orthod, 41, pp.762~766 (2007)
- Ahmed V KS, "Root damage and repair in patients with temporary skeletal anchorage devices", Am J Orthod Dentofacial Orthop, 141, pp.547~555 (2012)
- Demir N, "Evaluation of the marginal fit of full ceramic crowns by the microcomputed tomography(micro-CT)technique", Eur J Dent, 8, pp.437~444 (2014)
- Malkoç MA, "Micro-CT detection and characterization of porosity in luting cements", J Prosthodont, 24, pp.553~561 (2015)
- Harris DA, "Darendeliler MA. Physical properties of root cementum: part 8. Volumetric analysis of root resorption craters after application of controlled intrusive light and heavy orthodontic forces:a microcomputed tomography scan study", Am J Orthod Dentofacial Orthop, 130, pp.639~647 (2006)
- Chan EK, "A new method for volumetric measurement of orthodontically induced root resorption craters", Eur J Oral Sci, 112, pp.134~139 (2004)
- Weiland F., "Constant versus dissipating forces in orthodontics : the effect on initial tooth movement and root resorption", Eur J Orthod, 25, pp.335~342 (2003)
- Malek S, "Physical properties of root cementum: part I. A new method for 3-dimensional evaluation", Am J Orthod Dentofacial Orthop, 120, pp.198~208 (2001)
- Cheng LL, "Repair of root resorption 4 and 8 weeks after the application of continuous light and heavy forces for 4 weeks : a microcomputedtomography study", Am J Orthod Dentofacial Orthop, 136, pp.320. e1~320. e10 (2009)
- Kim H, "Histologic evaluation of rootsurface healing after root contact or approximation during placement of mini-implants", Am J Orthod Dentofacial Orthop, 139, pp.752~760 (2011)
- Hembree M, "Effects of intentional damage of the roots and surrounding structures with miniscrew implants", Am J Orthod Dentofacial Orthop, 135, pp.280~ (2009)
- Renjen R, "Root and pulp response after intentional injury from miniscrew placement", Am J Orthod Dentofacial Orthop, 136, pp.708~714 (2009)
- Huang LH, "Dental implants for orthodontic anchorage", Am J Orthod Dentofacial Orthop, 127, pp.713~722 (2005)
- Lee YK, "Root and bone response to the proximity of a miniimplant under orthodontic loading", Angle Orthod, 80, pp.452~458 (2010)
- Gonzales C, "Repair of root resorption 2 to 16 weeks after the application of continuous forces on maxillary first molars in rats : a 2-and 3-dimensional quantitative evaluation", Am J Orthod Dentofacial Orthop, 137, pp.477~485 (2010)
- Rygh P., "Orthodontic root resorption studied by electron microscopy", Angle Orthod, 47, pp.1~16 (1977)
- Reitan K., "Effects of force magnitude and direction of tooth movement on different alveolar bone types", Angle Orthod, 34, pp.244~255 (1964)
- Owman-Moll P, "Repair of orthodontically induced root resorption in adolescents", Angle Orthod, 65, pp.403~408 (1995)
- Xu X, "Using microcomputed tomography to evaluate the dynamics of orthodontically induced root resorption repair in a rat model", PLoS One, 11, pp.e0150135~ (2016)