Effects of root–cortex relationship, root shape, and impaction side on treatment duration and root resorption of impacted canines

2021 ◽  
Author(s):  
Mehmet Amuk ◽  
Nisa Gul Amuk ◽  
Taner Ozturk
Keyword(s):  
Risk Factors ◽  
Treatment Duration ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Positive Root ◽  
Alpha Angle ◽  
Root Cortex ◽  
Impacted Canines ◽  
Computed Tomography Images ◽  
Categorical Groups

Summary Objectives This retrospective longitudinal study aimed to evaluate the factors that affect the orthodontic treatment duration (OTD) and external apical root resorption (EARR) of maxillary impacted canines (MIC) as root–cortex relationship, root shape, impaction side, and gender. Material and method Thirty-eight patients (mean age 15.28 ± 1.48 years) who had unilateral MIC and undergone orthodontic treatment were included in this study. Root–cortex relationship, root–cortex intersection amount, root shape, impaction side, height, alpha angle, impaction zone, and length of the MIC were evaluated on cone-beam computed tomography images at the beginning of the treatment. Final assessments were performed on ortopantograms at the end of the treatment as canine angulation and tooth length. The sample was characterized by descriptive statistics; t-tests, Mann–Whitney U-test, ANOVA, and Kruskal–Wallis tests were used for the comparison of EARR and OTD values between the categorical groups. Results Root shape affected OTD, and the longest value was detected in MIC with bent root (P < 0.000). The presence of root–cortex relationship also prolonged OTD for approximately 3 months (P = 0.006). MIC with risk factors like positive root–cortex relationship and bent roots had higher EARR values than those with negative root–cortex relationship and normal roots (P = 0.042, P = 0.021, respectively). EARR of the palatal MIC was also higher than the buccal MIC (P = 0.009). OTD was significantly influenced by root–cortex intersection amount (P = 0.004). Conclusion The presence of root–cortex relationship and abnormal root shape were risk factors for greater EARR of MIC along OTD, which was also significantly influenced by root shape and root–cortex relationship.

scholarly journals External apical root resorption after orthodontic treatment: Incidence, severity and risk factors

2021 ◽  
Vol 15 (2) ◽  
pp. 100-105
Author(s):  
Fatih Bayir ◽  
Esra Bolat Gumus
Keyword(s):  
Risk Factors ◽  
Treatment Duration ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Prolonged Treatment ◽  
Apical Root Resorption ◽  
Related Risk ◽  
Treatment Type ◽  
Chi Squared ◽  
External Apical Root Resorption

Background. This study aimed to evaluate the incidence and severity of orthodontically induced inflammatory external apical root resorption (OIIEARR) and the relationship between OIIEARR and possible risk factors such as orthodontic treatment type, treatment duration, gender, and age of the patients. A further aim was to determine the prevalence of OIIEARR in different tooth groups. Methods. The study sample consisted of 1356 orthodontically treated patients (857 females and 498 males; mean age: 14.4±2.8 years). OIIEARR was evaluated using pre- and post-treatment panoramic radiographs for all the tooth groups. Teeth with severe resorption were also assessed. Patient- and treatment-related risk factors for OIIEARR were assessed statistically using Pearson’s chi-squared test, independent-samples t test, and one-way ANOVA. Results. The incidence of severe root resorption following orthodontic treatment was 14.8%. Males exhibited a higher incidence of root resorption compared to females. Orthodontic treatment duration and treatment with extractions were positively correlated with OIIEARR (P<0.05). OIIEARR was observed most frequently in maxillary incisors, followed by mandibular incisors. Conclusion. Orthodontic treatment with extraction, prolonged treatment duration, and large movements of the incisors should especially be taken into consideration for OIIEARR risk. Routine radiographic follow-up during orthodontic treatment is recommended.

scholarly journals KPG Index versus OPG Measurements: A Comparison between 3D and 2D Methods in Predicting Treatment Duration and Difficulty Level for Patients with Impacted Maxillary Canines

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Domenico Dalessandri ◽  
Marco Migliorati ◽  
Luca Visconti ◽  
Luca Contardo ◽  
Chung How Kau ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Treatment Duration ◽  
Orthodontic Treatment ◽  
Cone Beam ◽  
Occlusal Plane ◽  
Difficulty Level ◽  
Intrarater Reliability ◽  
Impacted Canines ◽  
Tip Position

Aim. The aim of this study was to test the agreement between orthopantomography (OPG) based 2D measurements and the KPG index, a new index based on 3D Cone Beam Computed Tomography (CBCT) images, in predicting orthodontic treatment duration and difficulty level of impacted maxillary canines.Materials and Methods. OPG and CBCT images of 105 impacted canines were independently scored by three orthodontists att0and after 1 month (t1), using the KPG index and the following 2D methods: distance from cusp tip and occlusal plane, cusp tip position in relation to the lateral incisor, and canine inclination. Pearson’s coefficients were used to evaluate the degree of agreement and theχ2with Yates correction test was used to assess the independence between them.Results. Inter- and intrarater reliability were higher with KPG compared to 2D methods. Pearson’s coefficients showed a statistically significant association between all the indexes, while theχ2with Yates correction test resulted in a statistically significant rejection of independency only for one 2D index.Conclusions. 2D indexes for predicting impacted maxillary canines treatment duration and difficulty sometimes are discordant; a 3D index like the KPG index could be useful in solving these conflicts.

scholarly journals Orthodontic treatment in impacted maxillary canines. A review of the literature

2021 ◽  
Vol 9 (4) ◽  
pp. e085
Author(s):  
Alexandra J. Aquino-Valverde ◽  
Datfne Milagros Barrientos-Sánchez ◽  
Katherine Joselyn Atoche-Socola
Keyword(s):  
Orthodontic Treatment ◽  
Root Resorption ◽  
Cost Benefit ◽  
Review Of The Literature ◽  
Canine Tooth ◽  
Correct Position ◽  
Adequate Treatment ◽  
Impacted Canines ◽  
Selection Of ◽  
Treatment Surgery

The prevalence of impacted maxillary canines is 1 to 3%, with approximately 50% of impacted canines causing root resorption of adjacent teeth. If the permanent canine has not acquired its correct position, evaluation by an orthodontist is necessary to determine the most adequate treatment. Surgery and orthodontic treatment are used for the treatment of impacted canines in the maxilla affecting permanent dentition. Selection of the most adequate treatment to achieve the correct position of the canine tooth depends on the position of the canine. This article summarizes the different techniques available and describes their advantages, and cost-benefit considerations. The objective of this literature review is to describe the etiology of impacted maxillary canines and provide an update of the information on orthodontic treatments available for these patients.

An Insight into Risk Factors for Root Resorption During Orthodontic Treatment

2016 ◽  
Vol 17 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Rohaya Megat Abdul Wahab ◽  
Noor Ayuni Ahmad Shafiai ◽  
Shahrul Hisham Zaina Ariffin
Keyword(s):  
Risk Factors ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Insight Into

Root resorption in orthodontic treatment with application of aligners. A retrospective study using cone-beam computed tomography

2019 ◽  
pp. 46-50
Author(s):  
N.D. Pilipenko ◽  
S.Yu. Maksyukov
Keyword(s):  
Risk Factors ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Cone Beam ◽  
Cortical Plate ◽  
Average Value ◽  
Absolute Reduction ◽  
Potential Risk Factors ◽  
Maxillary Incisors ◽  
The Difference

he aim of this work is to study the coverage and severity of the inflammatory resorption of the root of the maxillary incisors caused by orthodontic treatment with aligners using CBCT to determine possible risk factors. Measurement of the length of the root of the maxillary incisors was carried out on orthodontic images of CBCT in the pre- and post-therapeutic periods in 80 patients who received complex orthodontic treatment with aligners The average value of the absolute reduction of the root length varied between 0.47±.061 mm and 0.55±0.70 mm, and the difference between the central and lateral upper incisors was not significant. The defeat of the root reduction of more than 25%, amounted to 1.25% of cases. Potential risk factors included gender, malocclusion, crowding of teeth, and the approach of the tops of the roots of the teeth to the cortical plate in the post-therapeutic period. Complex treatment with aligners gives minimal root resorption. Sex, malocclusion, crowding of teeth, and the approach of the tops of the roots of the teeth to the cortical plate in the post-therapeutic period significantly affect the likelihood of changes in the length of the root.

scholarly journals Apical root displacement is a critical risk factor for apical root resorption after orthodontic treatment

2018 ◽  
Vol 88 (6) ◽  
pp. 740-747 ◽  
Author(s):  
Kyoung-Won Kim ◽  
Sung-Jin Kim ◽  
Ji-Yeon Lee ◽  
Yoon-Jeong Choi ◽  
Chooryung J. Chung ◽  
...  
Keyword(s):  
Risk Factors ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Critical Factor ◽  
Mixed Effects ◽  
Mixed Effects Model ◽  
Linear Mixed Effects ◽  
Apical Root Resorption ◽  
Lateral Cephalograms ◽  
Mandibular Incisors

ABSTRACT Objectives: To identify risk factors for apical root resorption (ARR) of maxillary and mandibular incisors using mathematical quantification of apical root displacement (ARD) and multiple linear mixed-effects modeling. Materials and Methods: Periapical radiographs of maxillary and mandibular incisors and lateral cephalograms of 135 adults were taken before and after orthodontic treatment. ARR was measured on the periapical radiographs, and movement of central incisors was evaluated on the superimposed pre- and posttreatment lateral cephalograms. ARD was mathematically calculated from pretreatment tooth length, inclination change, and movement of the incisal edge. Linear mixed-effects model analysis was performed to identify risk factors for ARR, and standardized coefficients (SCs) were calculated to investigate the relative contribution of the risk factors to ARR. Results: Vertical ARD showed the highest SCs for both maxillary and mandibular incisors. Horizontal ARD showed the second highest SC for mandibular incisors but was not significantly correlated with the ARR of maxillary incisors. When horizontal and vertical ARDs were included in the mixed-effects model, the use of self-ligating brackets was significantly correlated with increased ARR of mandibular incisors. Conclusions: ARD is a critical factor for ARR after orthodontic treatment. Careful monitoring of ARR is recommended for patients requiring significant ARD of incisors.

scholarly journals External Root Resorption (ERR) after orthodontic treatment: Review article

2021 ◽  
Vol 12 (3) ◽  
pp. 158-163
Author(s):  
Fernando Mauricio Villalta Mendoza ◽  
Viviana Carolina Cordero Morales ◽  
Christian Daniel Piedra Arpi ◽  
Jorge Antonio Reinoso Ortiz
Keyword(s):  
Risk Factors ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Genetic Alterations ◽  
Review Article ◽  
Negative Consequences ◽  
External Root Resorption ◽  
Treatment Review

External root resorption (ERR) after orthodontic treatment represents one of its associated negative consequences. For several years, the existence of risk factors that contribute to the establishment of this alteration has been described, where we find genetic alterations related to the orthodontic treatment performed.

scholarly journals Apical Root Resorption: A Prospective Radiographic Study of Maxillary Incisors

2011 ◽  
Vol 05 (03) ◽  
pp. 318-323 ◽  
Author(s):  
Ilken Kocadereli ◽  
Turkan Nadire Yesil ◽  
Pınar Sahin Veske ◽  
Serdar Uysal
Keyword(s):  
Image Analysis ◽  
Treatment Duration ◽  
Orthodontic Treatment ◽  
Root Resorption ◽  
Radiographic Study ◽  
Flatbed Scanner ◽  
Time Intervals ◽  
Evaluation Period ◽  
Apical Root Resorption ◽  
Maxillary Incisors

ABSTRACTObjectives: The aim of this study was to determine the prevalence of apical root resorption in maxillary incisors during the initial stages of active orthodontic treatment and to test the hypothesis that root resorption increases with the progress of the treatment. Methods: The study sample consisted of 80 teeth of 20 patients (14 female, 6 male) with a mean age of 14.9±2.8 years. Root resorption was determined with standardized digitized periapical radiographs. All the periapical radiographs were obtained at the beginning of orthodontic treatment (T0) and 3 months (T1), 6 months (T2) and 9 months (T3) after the beginning of the treatment by a paralleling device. They were digitalized as 600 dpi with a flatbed scanner and analyzed by software for image analysis at 400x magnification utilizing a personal computer. Results: All of the 4 maxillary incisors had an increasing amount of resorption during the 9-month period. The amount of root resorption between the time intervals was statistically significant (P<.05). Conclusions: Root resorption of maxillary incisors can be detected in the early stages of orthodontic treatment and appears to be related to treatment duration. According to 9-month evaluation period, apical root resorption is of limited clinical significance for the average orthodontic patient. (Eur J Dent 2011;5:318-323)

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