Contact of the incisive canal and upper central incisors causing root resorption after retraction with orthodontic mini-implants: A CBCT study

Pan, Yichen; Chen, Si

doi:10.2319/042318-311.1

Cited by 34 publications

(50 citation statements)

References 18 publications

(28 reference statements)

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“…It is assumed that the size and configuration of the incisive canal contributes to root resorption. This notion is further supported by the fact that the difference in the amount of resorption between roots contacting the incisive canal and those without contact in a previous study 21 was similar to the difference between the left and right central incisors in the present case (Table 2). Previously, Cho et al 6 reported that the incisive canal width is larger than the inter-root distance in over 60% patients.…”

Section: And Thesupporting

confidence: 89%

Unilateral maxillary central incisor root resorption after orthodontic treatment for Angle Class II, division 1 malocclusion with significant maxillary midline deviation: A possible correlation with root proximity to the incisive canal

2020

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Root resorption can be caused by several factors, including contact with the cortical bone. Here we report a case involving a 21-year-old female with Angle Class II, division 1 malocclusion who exhibited significant root resorption in the maxillary right central incisor after orthodontic treatment. The patient presented with significant left-sided deviation of the maxillary incisors due to lingual dislocation of the left lateral incisor and a Class II molar relationship. Cephalometric analysis demonstrated a Class I skeletal relationship (A pointnasion-B point, 2.5 o) and proclined maxillary anterior teeth (upper incisor to sella-nasion plane angle, 113.4 o). The primary treatment objectives were the achievement of stable occlusion with midline agreement between the maxillary and mandibular dentitions and appropriate maxillary anterior tooth axes and molar relationship. A panoramic radiograph obtained after active treatment showed significant root resorption in the maxillary right central incisor; therefore, we performed cone-beam computed tomography, which confirmed root resorption along the cortical bone around the incisive canal. The findings from this case, where different degrees of root resorption were observed despite comparable degrees of orthodontic movement in the bilateral maxillary central incisors, suggest that the incisive canal could be an inducing factor for root resorption. However, further investigation is necessary to confirm this assumption.

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Section: And Thesupporting

confidence: 89%

Unilateral maxillary central incisor root resorption after orthodontic treatment for Angle Class II, division 1 malocclusion with significant maxillary midline deviation: A possible correlation with root proximity to the incisive canal

2020

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“…In 2-dimensional cephalometric radiograph, Björk et al 22 – 24 have established superimposition based on stable regions using metallic implants. Since its introduction in 1980s 25 , CBCT has proved to be an efficient tool in detecting problems of craniofacial structures and made it possible to superimpose on three-dimensional structures 3 , 4 .…”

Section: Discussionmentioning

confidence: 99%

Accuracy and reliability of maxillary digital model (MDM) superimposition in evaluating teeth movement in adults compared with CBCT maxillary superimposition

Pan

Wang

Dai

et al. 2020

Sci Rep

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Superimposition of 3D maxillary digital dental models of different time points based on palatal vault region has been used to evaluate tooth movement during orthodontic treatment. This study evaluated the accuracy and reliability of 3D maxillary digital model (MDM) superimposition in adults by comparing it with CBCT maxillary superimposition. In CBCT maxillary superimposition, voxel-based superimposition was firstly conducted, and MDMs were matched with corresponding CBCT models (CBCT-MDM superimposition). MDM superimposition (palatal vault regional superimposition) were performed on another pair of pre- and posttreatment MDMs. The position and orientation of upper first molars (U6s) and upper central incisors (U1s) on the posttreatment MDMs were compared to assess the accuracy of the MDM superimposition methods. The reliability was validated in both MDM superimposition and CBCT maxillary superimposition. In terms of accuracy, the average linear deviations in U6 and U1 positions were less than ± 0.3 mm, the average angular deviations of U6s and U1s were less than ± 0.2°, both have no significant difference from zero. The ICCs for MDM superimposition ranged from 0.85 to 0.99. The ICCs for CBCT-MDM superimposition were larger than 0.99 in all items. MDM superimposition was an efficient, accurate and reliable method for evaluating teeth movement in adults, although its reliability is slightly lower than CBCT maxillary superimposition.

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“…In addition, insufficiency of the maxillary width during tooth movement could be a risk associated with root resorption [28]. One study observed the relationship between contact the incisive canal of upper central incisors and root resorption [29]. The results showed that contact between upper incisors and the cortical plate of the incisive canal cause significantly more apical root resorption.…”

Section: Discussionmentioning

confidence: 99%

Morphological changes of the anterior alveolar bone due to retraction of anterior teeth: a retrospective study

Sun

Chen

et al. 2019

Preprint

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Background: The morphology of the anterior alveolar bone may change after the retraction of incisors in premolar extraction cases in orthodontics. Methods: Pre- (T0) and post-treatment (T1) lateral cephalograms of 477 subjects in the maxilla and 226 subjects in the mandible who underwent the orthodontic treatment with extraction of 2 premolars in upper or lower arches were included. Alveolar bone width and height in both the maxillary and mandible incisor area were measured at T0 and T1 respectively. By superimposing the T0 and T1 cephalometric tracings, changes of points A and B, and the movement of the incisors were also measured. Results: The alveolar bone width (ABW) showed a significant decrease in both maxilla and mandible (P<0.001) except the labial side of the mandible, which exhibited slight increase, though statistically insignificant (P>0.05). The alveolar bone height (ABH) showed a significant increase in the labial side of maxilla and a significant decrease in the lingual side of maxilla and mandible. A strong positive correlation was observed between incisor movement and position changes of points A and B both in the horizontal and vertical direction. Conclusions: Anterior alveolar bone width and height generally decreased after orthodontic treatment. Incisor retraction led to a significant position changes of points A and B.

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Contact of the incisive canal and upper central incisors causing root resorption after retraction with orthodontic mini-implants: A CBCT study

Cited by 34 publications

References 18 publications

Unilateral maxillary central incisor root resorption after orthodontic treatment for Angle Class II, division 1 malocclusion with significant maxillary midline deviation: A possible correlation with root proximity to the incisive canal

Unilateral maxillary central incisor root resorption after orthodontic treatment for Angle Class II, division 1 malocclusion with significant maxillary midline deviation: A possible correlation with root proximity to the incisive canal

Accuracy and reliability of maxillary digital model (MDM) superimposition in evaluating teeth movement in adults compared with CBCT maxillary superimposition

Morphological changes of the anterior alveolar bone due to retraction of anterior teeth: a retrospective study

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