Directions of orthodontic tooth movements associated with external apical root resorption of the maxillary central incisor

Author(s):  
Robert J. Parker ◽  
Edward F. Harris
2019 ◽  
Vol 41 (6) ◽  
pp. 575-582 ◽  
Author(s):  
Eglė Zasčiurinskienė ◽  
Henrik Lund ◽  
Rune Lindsten ◽  
Henrik Jansson ◽  
Krister Bjerklin

Summary Background No evidence is present on the risk for external apical root resorption (EARR) during orthodontic treatment (OT) of adult patients with periodontal disease. Aim To examine EARR after OT in subjects with periodontal disease and to analyse how intrusion and change in inclination of the most proclined maxillary incisors influence EARR. Methods The study included 50 patients with periodontal disease. Sub-gingival debridement by ultrasonic instrumentation supplemented with hand instruments was performed by experienced dental hygienist after baseline examination for all patients. For the control group, final periodontal treatment (PT) was performed before orthodontic tooth movement. For the test group patients, final PT was performed after levelling and alignment phases were finished, before the active space closure with elastic chain and/or inter-arch elastic traction for sagittal correction was started. OT was performed with a straight-wire appliance. Micro-implants or implants were used for posterior anchorage. Cone beam computed tomography examinations were performed before and after OT. EARR of all single-rooted teeth were measured. EARR of the most proclined maxillary incisor was related to intrusion and change in inclination angle. Results EARR after OT was observed in median 80.7 per cent (interquartile range 22.02) of single-rooted teeth [mean 1.2 (standard deviation 0.44) mm]. In 82.3 per cent of teeth, EARR was 2 mm or less. Severe EARR was found in 8 per cent of patients and five maxillary incisors (less than 1 per cent of all teeth). The amount of intrusion and change in inclination angle of the most proclined maxillary central incisor influenced the extent of EARR. Mean EARR was significantly higher when OT lasted more than 18 months (P = 0.02). Conclusions OT in conjunction with PT in periodontal patients resulted in EARR in 81 per cent of all single-rooted teeth. Intrusion and change in inclination angle of the most proclined maxillary central incisor influenced the extent of EARR, as did longer OT.


2003 ◽  
Vol 82 (5) ◽  
pp. 356-360 ◽  
Author(s):  
R.A. Al-Qawasmi ◽  
J.K. Hartsfield ◽  
E.T. Everett ◽  
L. Flury ◽  
L. Liu ◽  
...  

External apical root resorption (EARR) is a common orthodontic treatment sequela. Previous studies implicate a substantial genetic component for EARR. Using a candidate gene approach, we investigated possible linkage of EARR associated with orthodontic treatment with the TNSALP, TNF α , and TNFRSF11A gene loci. The sample was comprised of 38 American Caucasian families with a total of 79 siblings who completed comprehensive orthodontic treatment. EARR was assessed by means of pre- and post-treatment radiographs. Buccal swab cells were collected for extraction and analysis of DNA. No evidence of linkage was found with EARR and the TNF α and TNSALP genes. Non-parametric sibling pair linkage analysis identified evidence of linkage (LOD = 2.5; p = 0.02) of EARR affecting the maxillary central incisor with the microsatellite marker D18S64 (tightly linked to TNFRSF11A). This indicates that the TNFRSF11A locus, or another tightly linked gene, is associated with EARR.


2020 ◽  
Vol 9 (42) ◽  
pp. 3159-3162
Author(s):  
Gaurav Umesh Chaudhari ◽  
Sumanthini Venkatsubramanyam Margasahayam ◽  
Vanitha Umesh Shenoy ◽  
Akash Kiran More ◽  
Anuradha Bhausaheb Patil

2017 ◽  
Vol 42 (2) ◽  
pp. E55-E58 ◽  
Author(s):  
EG Reston ◽  
RPR Bueno ◽  
LQ Closs ◽  
J Zettermann

SUMMARY Internal bleaching in endodontically treated teeth requires care and protection to prevent harm to the periodontal ligament due to peroxide and may result in external root resorption. There is a myriad of treatment options when this occurs, such as monitoring, extraction, and subsequent rehabilitation with implants or fixed prosthodontics. In some cases, such as the one described here, a conservative attempt to maintain the tooth as a single structure can be made by sealing the resorptive defect. In the present case, we show a multidisciplinary approach where orthodontics, periodontics, and restorative dentistry were involved in treating the maxillary right central incisor (#8) of a 65-year-old patient with extensive cervical resorption, whose chief complaint was esthetics. The proposed treatment was extrusion of the tooth followed by curettage and restoration of the defect with glass ionomer cement. The patient has been followed for 15 years with no signs of recurrence, maintenance of periodontal health, and patient satisfaction with the esthetic outcome.


2008 ◽  
Vol 41 (11) ◽  
pp. 997-1004 ◽  
Author(s):  
J. M. Armas ◽  
L. Savarrio ◽  
L. M. Brocklebank

2017 ◽  
Vol 14 (6) ◽  
pp. 403 ◽  
Author(s):  
Farnaz Younessian ◽  
Azita Tehranchi ◽  
Azin Sadighnia ◽  
AmirH Abdi ◽  
Armin Shirvani

2003 ◽  
Vol 27 (3) ◽  
pp. 235-238 ◽  
Author(s):  
Sham Bhat ◽  
S. Sharan ◽  
Imneet Madan

External resorption is sequelae of necrotic periodontal membrane over a large area of root following an injury to the tooth. This usually occurs after severe dental injuries such as intrusion, severe luxations or exarticulation injuries complicated by a prolonged extra oral period. This case report presents a clinical and radiographic follow up (13 months) of treatment of inflammatory external root resorption on maxillary central incisor using Vitapex®. Gradual healing of resorption was observed radiographically with no tenderness or pathological mobility.


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