scholarly journals External Root Resorption after Orthodontic Treatment with Invisalign®: A Retrospective Study

2020 ◽  
Vol 12 (11) ◽  
pp. 125
Author(s):  
Haya AlSagr ◽  
Shahd AlMujel ◽  
Sadeen AlShiha ◽  
Najlaa AlShathri ◽  
Deema AlShammary
Keyword(s):  
Retrospective Study ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Root Apex ◽  
Post Treatment ◽  
Riyadh City ◽  
Crown Length ◽  
Anterior Teeth ◽  
External Root Resorption ◽  
Pre Treatment

AIM: To measure the incidence and severity of root resorption after orthodontic treatment with Invisalign. MATERIAL AND METHODS: This retrospective study was conducted at Riyadh, Saudi Arabia from June 2017 to January 2018. Pre- treatment and post-treatment Orthopantographs were obtained from orthodontic records of 29 patients managed with aligners (Invisalign®, Align Technologies, Santa Clara, CA, USA) at different dental clinics in Riyadh City. The selected sample was fulfilled the following criteria: (1) Class I malocclusion, (2) Mild to moderate crowding, (3) Non-extraction orthodontic treatment, (3) No evidence of root resorption before orthodontic treatment, (4) No root abnormalities or dilaceration, and (5) Good quality of pre- and post-treatment Orthopantographs. One examiner performed the measurements directly on the Orthopantographs using electronic digital caliper (Mitutoyo Manufacturing Co. Ltd., Tokyo, Japan) with an accuracy of 0.01mm. The measurements were performed on maxillary and mandibular central incisors, lateral incisors, and canines pre- and post-operatively, resulting in a total of 696 measurements. The crown length was measured from incisal edge to cemento- enamel-junction, while the root length from cemento-enamel-junction to root apex. RESULTS: In our study, 72% of the teeth demonstrated root resorption, in regard to the severity of root resorption, we found that mild root resorption > 0% up to 2% in all the affected teeth. Upper Anterior teeth have more significant resorption rate than lower anterior teeth P<0.05. CONCLUSION: The present study showed that incidence of root resorption was high after orthodontic treatment with Invisalign®, however the severity is very low and it is limited to the surface resorption only.

scholarly journals Apical root resorption during orthodontic treatment with aligners? A retrospective radiometric study

2013 ◽  
Vol 9 (1) ◽  
Author(s):  
Elena Krieger ◽  
Thomas Drechsler ◽  
Irene Schmidtmann ◽  
Collin Jacobs ◽  
Simeon Haag ◽  
...  
Keyword(s):  
Root Length ◽  
Orthodontic Treatment ◽  
Influence Factor ◽  
Root Resorption ◽  
Post Treatment ◽  
Anterior Crowding ◽  
Anterior Teeth ◽  
Lateral Cephalograms ◽  
Length Changes ◽  
Pre Treatment

Abstract Introduction Objective of this study was to investigate the incidence and severity of apical root resorptions (ARR) during orthodontic treatment with aligners. Materials and methods The sample comprised 100 patients (17–75 years of age) with a class I occlusion and anterior crowding before treatment, treated exclusively with aligners (Invisalign®, Align Technologies, Santa Clara, CA, USA). The following teeth were assessed: upper and lower anterior teeth and first molars. Root and crown lengths of a total of 1600 teeth were measured twice in pre- and post-treatment panoramic radiographs. Afterwards, relative changes of the root length during treatment were calculated by a root-crown-ratio taking pre- and post-treatment root and crown lengths into consideration. A reduction of this ratio was considered as a shortening of the initial root length. Additionally, tooth movements of the front teeth were assessed by lateral cephalograms and the 3-dimensonal set up of each patient. Results All patients had a reduction of the pre-treatment root length with a minimum of two teeth. On average 7.36 teeth per patient were affected. 54% of 1600 measured teeth showed no measurable root reduction. A reduction of >0%-10% of the pre-treatment root length was found in 27.75%, a distinct reduction of >10%-20% in 11.94%. 6.31% of all teeth were affected with a considerable reduction of >20%. We found no statistically significant correlation between relative root length changes and the individual tooth, gender, age or sagittal and vertical orthodontic tooth movement; except for extrusion of upper front teeth, which was considered as not clinical relevant due to the small amount of mean 4% ARR. Conclusions The present study is the first analyzing ARR in patients with a fully implemented orthodontic treatment with aligners (i.e. resolving anterior crowding). The variety was high and no clinical relevant influence factor could be detected. A minimum of two teeth with a root length reduction was found in every patient. On average, 7.36 teeth per patient were affected.

scholarly journals Comprehensive orthodontic treatment in an adolescent patient with Class II Division 1 malocclusion and ankylosed maxillary central incisors

2019 ◽  
Vol 9 ◽  
pp. 190-197
Author(s):  
Matthew Wen Jian Lau
Keyword(s):  
Poor Prognosis ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Class Ii ◽  
Anterior Teeth ◽  
External Root Resorption ◽  
Facial Esthetics ◽  
Division 1 ◽  
Traumatic Episode

While uncommon in orthodontics, the extraction of central incisors may be indicated when such teeth are of poor prognosis. This report details orthodontic treatment of a 13-year and 5-month-old Chinese female, who presented with Class II/1 malocclusion on a Class II skeletal jaw base relationship. Her maxillary central incisors were ankylosed and had undergone severe external root resorption following a previous traumatic episode. Orthodontic treatment involved removal of the maxillary central incisors and the mandibular first premolars. Pre-adjusted edgewise appliances with MBT prescription were used. To enhance anterior esthetics, prosthetic buildup of the four maxillary anterior teeth was performed before appliance removal. Tight intercuspation of teeth and optimal facial esthetics were achieved at appliance debond and maintained at 2-year follow-up.

scholarly journals The influence of bracket torque on external apical root resorption in bimaxillary protrusion patients: a retrospective study

2022 ◽  
Vol 22 (1) ◽  
Author(s):  
Xiaojuan Zhang ◽  
Hong Zhou ◽  
Xiangling Liao ◽  
Yi Liu
Keyword(s):  
Root Resorption ◽  
Three Dimensional ◽  
Post Treatment ◽  
Maxillary Central Incisor ◽  
Paired Samples ◽  
Anterior Teeth ◽  
Significant Difference ◽  
High Torque ◽  
Pre Treatment ◽  
Bimaxillary Protrusion

Abstract Background To evaluate the difference in root resorption between standard torque self-ligating brackets and high torque self-ligating brackets in bimaxillary protrusion patients after orthodontic treatment. Methods Pre-treatment and post-treatment Cone beam computed tomography (CBCT) of 32 patients (16 treated with the high torque DamonQ 0.022″ bracket and 16 with the 0.022″ standard torque self-ligating bracket) were selected. The first premolars were extracted from all patients before treatment. After mini-screw implants were inserted into the buccal region between the second premolar and first molar, 150 g of force was applied to retract the upper and lower anterior teeth to close the extraction space on each side. CBCT images of all patients were taken before and after treatment. Three-dimensional reconstruction of the maxillary central incisor, lateral incisor and canine was conducted with Mimics 20.0 software. The volumes of the roots were calculated using Gomagics Studio 12.0 software. The differences between the pre-treatment and post-treatment root volumes were statistically evaluated with a paired-samples t-test. Results There was no statistically significant difference in root resorption degree between the two kinds of torque brackets. The patient’s degree of root resorption in the high torque self-ligating group was greater than that in the standard torque group. Conclusions There was no significant difference in root external apical resorption between the high torque self-ligating brackets and the standard torque self-ligating brackets in bimaxillary protrusion patients.

scholarly journals The Influence of Bracket Torque on External Apical Root Resorption in Bimaxillary Protrusion Patients: A Retrospective Study

2021 ◽  
Author(s):  
Zhang Xiaojuan ◽  
Zhou Hong ◽  
Liao Xiangling ◽  
Sang Jinhua
Keyword(s):  
Root Resorption ◽  
Three Dimensional ◽  
Clinical Work ◽  
Post Treatment ◽  
Maxillary Central Incisor ◽  
Anterior Teeth ◽  
Significant Difference ◽  
High Torque ◽  
Pre Treatment ◽  
Bimaxillary Protrusion

Abstract Objectives: To evaluate the difference in root resorption between standard torque self-ligating brackets and high torque self-ligating brackets in bimaxillary protrusion patients after orthodontic treatment.Materials and Methods: Pre-treatment and post-treatment CBCT of 32 patients (16 treated with the high torque DamonQ 0.022” bracket and 16 with the 0.022” standard torque self-ligating bracket) were selected. The first premolars were extracted from all patients before treatment. After mini-screw implants were inserted into the buccal region between the second premolar and first molar, 150 g of force was applied to retract the upper and lower anterior teeth to close the extraction space on each side. CBCT images of all patients were taken before and after treatment. Three-dimensional reconstruction of the maxillary central incisor, lateral incisor and canine was conducted with Mimics 20.0 software. The volumes of the roots were calculated using Gomagics Studio 12.0 software. The differences between the pre-treatment and post-treatment root volumes were statistically evaluated with a paired-samples t-test.Results: There was no statistically significant difference in root resorption degree between the two kinds of torque brackets. The patient’s degree of root resorption in the high torque self-ligating group was greater than that in the standard torque group.Conclusions: There was no significant difference in root external apical resorption between the high torque self-ligating brackets and the standard torque self-ligating brackets in bimaxillary protrusion patients.Clinical Relevance: A comparison of the effects of different torque brackets on root resorption can provide some guidance for bracket selection in clinical work.

scholarly journals Is there Correlation between the Root Apex Anatomy with External Root Resorption?

2014 ◽  
Vol 5 (3) ◽  
pp. 162-165
Author(s):  
Mateus Rodrigues Tonetto ◽  
Shelon Cristina Souza Pinto ◽  
Alvaro Henrique Borges ◽  
Mônica Barros Silva ◽  
Carlo Ralph de Musis ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Root Resorption ◽  
Panoramic Radiography ◽  
Root Apex ◽  
Panoramic Radiograph ◽  
Short Root ◽  
External Root Resorption ◽  
Before And After ◽  
Tooth Type ◽  
Fixed Appliances

ABSTRACT The aim of this study was to correlate the root apex anatomies with external root resorption in patients orthodontically treated through panoramic radiography and cone beam computed tomography (CBCT) methods. Two hundred and forty dental roots were evaluated by tomographic and radiograph images from thirty patients submitted to orthodontic treatment. Orthodontic treatment with fixed appliances was developed based on the technique of straight arc (Straightwire) with Roth prescription. Dental roots anatomy were classified based on shape as: Score 0 – normal root; Score 2 – short root; Score 2 – blunt; Score 3 – bent; and Score 4 – pipette shape. Measurements of external root resorption (ERR) were performed before and after orthodontic treatment by means of CBCT and panoramic radiograph. All patients and 72% of the 173 roots presented with ERR. The frequency of root type, the normal root (score 0) was 88.75% in panoramic radiography and only 18.75% for CBCT. The frequency of ERR was high in maxillary central incisors (73%), maxillary lateral incisors (73%), mandibular central incisors (72%), mandibular lateral incisors (70%). Statistical analysis showed no correlation between the methods, type root and tooth type (p < 0.05). The CBCT had better results for identifying apical roots resorption than panoramic radiograph, but the correlation between the type of root and ERR was not confirmed. How to cite this article Gilbert TJ, Silva MB, Pinto SCS, Bhandi SH, de Musis CR, Castro I, Estrela C, Borges AH, Tonetto MR, Bandeca MC. Is there Correlation between the Root Apex Anatomy with External Root Resorption? World J Dent 2014;5(3):162-165.

scholarly journals Severe root resorption resulting from orthodontic treatment: Prevalence and risk factors

2015 ◽  
Vol 20 (1) ◽  
pp. 52-58 ◽  
Author(s):  
Caroline Pelagio Raick Maués ◽  
Rizomar Ramos do Nascimento ◽  
Oswaldo de Vasconcellos Vilella
Keyword(s):  
Risk Factors ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Root Apex ◽  
Dental Arch ◽  
Chi Square ◽  
Prolonged Therapy ◽  
Treatment Prevalence ◽  
External Root Resorption ◽  
Treatment Onset

OBJECTIVE: To assess the prevalence of severe external root resorption and its potential risk factors resulting from orthodontic treatment. METHODS: A randomly selected sample was used. It comprised conventional periapical radiographs taken in the same radiology center for maxillary and mandibular incisors before and after active orthodontic treatment of 129 patients, males and females, treated by means of the Standard Edgewise technique. Two examiners measured and defined root resorption according to the index proposed by Levander et al. The degree of external apical root resorption was registered defining resorption in four degrees of severity. To assess intra and inter-rater reproducibility, kappa coefficient was used. Chi-square test was used to assess the relationship between the amount of root resorption and patient's sex, dental arch (maxillary or mandibular), treatment with or without extractions, treatment duration, root apex stage (open or closed), root shape, as well as overjet and overbite at treatment onset. RESULTS: Maxillary central incisors had the highest percentage of severe root resorption, followed by maxillary lateral incisors and mandibular lateral incisors. Out of 959 teeth, 28 (2.9%) presented severe root resorption. The following risk factors were observed: anterior maxillary teeth, overjet greater than or equal to 5 mm at treatment onset, treatment with extractions, prolonged therapy, and degree of apex formation at treatment onset. CONCLUSION: This study showed that care must be taken in orthodontic treatment involving extractions, great retraction of maxillary incisors, prolonged therapy, and/or completely formed apex at orthodontic treatment onset.

scholarly journals Root Resorption in Orthodontic Treatment: Scoping Review

2018 ◽  
Vol 7 (2) ◽  
pp. 47-51
Author(s):  
Neeta Aryal ◽  
Mao Jing
Keyword(s):  
Scoping Review ◽  
Orthodontic Treatment ◽  
Tooth Movement ◽  
Root Resorption ◽  
Orthodontic Tooth Movement ◽  
Conventional Radiography ◽  
Promising Tool ◽  
External Root Resorption ◽  
Long Time ◽  
Orthodontic Patients

Introduction: Root resorption is the loss of apical root tissue leading to the shortness of root which is often evident in orthodontic tooth movement. Proper management during orthodontic treatment however can minimize this undesirable outcome. The present article attempts to review the etiology of root resorption, methods of diagnosis, and strategies for prevention.Materials & Method: A scoping review was done with the purpose to carry out the narrative integration of the relevant evidences on root resorption and orthodontic treatment from the published literatures. The resulting papers were studied and reviewed thoroughly for the key explanation of root resorption in orthodontic patients. A total of 41 published research articles were reviewed.Discussion: According to the literatures root resorption is common iatrogenic outcome in orthodontic treatment. Biological, mechanical, and combined biological and mechanical factors result in external root resorption. Though most clinicians diagnose root resorption by conventional radiography, researches have clearly shown that CBCT is the promising tool. The clinicians need to counsel orthodontic patients and their parents that the root resorption might be a potential consequence of the treatment lasting for long time. In case of severity; it is essential to reassess the patient and minimize the underlying cause. It is necessary to understand the role of orthodontist in preventing root resorption

scholarly journals Predisposing factors to severe external root resorption associated to orthodontic treatment

2013 ◽  
Vol 18 (1) ◽  
pp. 110-120 ◽  
Author(s):  
Gracemia Vasconcelos Picanço ◽  
Karina Maria Salvatore de Freitas ◽  
Rodrigo Hermont Cançado ◽  
Fabricio Pinelli Valarelli ◽  
Paulo Roberto Barroso Picanço ◽  
...  
Keyword(s):  
Root Length ◽  
Orthodontic Treatment ◽  
Alveolar Bone ◽  
Root Resorption ◽  
Treatment Time ◽  
Predisposing Factors ◽  
Crown Root ◽  
External Root Resorption ◽  
Lateral Cephalograms ◽  
Maxillary Incisors

OBJECTIVE: The aim of this study was to evaluate predisposing factors among patients who developed moderate or severe external root resorption (Malmgren's grades 3 and 4), on the maxillary incisors, during fixed orthodontic treatment in the permanent dentition. METHODS: Ninety-nine patients who underwent orthodontic treatment with fixed edgewise appliances were selected. Patients were divided into two groups: G1 - 50 patients with no root resorption or presenting only apical irregularities (Malmgren's grades 0 and 1) at the end of the treatment, with mean initial age of 16.79 years and mean treatment time of 3.21 years; G2 - 49 patients presenting moderate or severe root resorption (Malmgren's grades 3 and 4) at the end of treatment on the maxillary incisors, with mean initial age of 19.92 years and mean treatment time of 3.98 years. Periapical radiographs and lateral cephalograms were evaluated. Factors that could influence the occurrence of severe root resorption were also recorded. Statistical analysis included chi-square tests, Fisher's exact test and independent t tests. RESULTS: The results demonstrated significant difference between the groups for the variables: Extractions, initial degree of root resorption, root length and crown/root ratio at the beginning, and cortical thickness of the alveolar bone. CONCLUSION: It can be concluded that: Presence of root resorption before the beginning of treatment, extractions, reduced root length, decreased crown/root ratio and thin alveolar bone represent risk factors for severe root resorption in maxillary incisors during orthodontic treatment.

scholarly journals The Impact of Orthodontic Treatment on Pre-Existing Gingival Recessions: A Retrospective Study

2021 ◽  
Vol 11 (19) ◽  
pp. 9036
Author(s):  
Guostė Antanavičienė ◽  
Eglė Zasčiurinskienė ◽  
Dalia Smailienė ◽  
Nomeda Basevičienė
Keyword(s):  
Retrospective Study ◽  
Orthodontic Treatment ◽  
Negative Impact ◽  
Open Bite ◽  
Class Iii ◽  
Before And After ◽  
Pre Treatment ◽  
Mandibular Teeth ◽  
The Impact ◽  
Plaster Models

(1) Background: This retrospective study aimed to examine the change of gingival recessions (GR) before and after orthodontic treatment (OT). (2) Methods: Patients who had at least one GR on the vestibular surface of maxillary/mandibular teeth mesial to first molars were included. GR was measured on good quality plaster models before and after OT. (3) Results: Significant improvement of mean GR at patient level was found between T0 and T1 (0.45 mm, 95% CI: 0.28, 0.62) (p < 0.001). In 51.4% of patients GRs became better, in 37.8% GRs did not change. and in 10.8% GRs became worse. At tooth level the mean GR improvement was 0.54 mm (CI: 0.42, 0.65; median 0.55 mm Q1; Q3: 0.12, 0.96) (p < 0.001). GR improved in 67 teeth (58.7%), did not change in 41 (36.0%), and worsened in 6 (5.3%). Full healing was observed in 15 teeth. A reduced GR improvement was found in cases with pre-treatment open bite (OR 3.89; CI: 1.35, 11.16; p = 0.008) and dental Class III patients (OR 2.6; CI: 1.11, 6.0; p = 0.026). (4) Conclusion: There was an improvement of GR after OT in more than half of the patients. Class III malocclusion and reduced pre-treatment overbite had a negative impact on GR improvement.

Generalized severe idiopathic external root resorption and the importance of pre-treatment radiographs: a case report

2015 ◽  
Vol 8 (1) ◽  
pp. 19-22
Author(s):  
Tina Halai ◽  
Natalie Milner ◽  
Madiha Al-Anqoodi ◽  
Mariyah Nazir
Keyword(s):  
Case Report ◽  
Root Resorption ◽  
External Root Resorption ◽  
Pre Treatment
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