Morphologic changes of the incisive canal and its proximity to maxillary incisor roots after anterior tooth movement

Yu, Ji Hee; Nguyen, Tung; Kim, Yong Il; Hwang, Soonshin; Kim, Kyung Ho; Chung, Chooryung J.

doi:10.1016/j.ajodo.2020.08.022

Cited by 10 publications

(20 citation statements)

References 33 publications

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“…Even though remodeling of the IC was reported in some previous studies, contact with or invasion of the U1 roots to the IC was fairly high after maximum anterior retraction. 21 Chung et al 12 reported only 24% of subjects showed IC remodeling after maximum retraction and, a more recent study by Yu et al 21 reported only 11.4% of subjects showed some signs of IC remodeling. In addition, the remodeling group still demonstrated apical root resorption, though it was less than in the non-remodeling group.…”

Section: Discussionmentioning

confidence: 98%

Proximity of upper central incisors to incisive canal among subjects with maxillary dentoalveolar protrusion in various facial growth patterns:

Al-Rokhami¹,

Sakran²,

Alhammadi³

et al. 2022

The Angle Orthodontist

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Objective To investigate the position of the upper central incisor roots (U1) relative to the incisive canal (IC) among subjects with maxillary dentoalveolar protrusion in various facial growth patterns. Materials and Methods 240 cone beam computed tomography images of skeletal Class I and II maxillary or bimaxillary protrusive subjects with a mean age of 23.74 ± 3.73 years were enrolled according to their facial growth pattern. The IC volume was measured using Mimics 21 software (Materialise, Leuven, Belgium). The U1 inter-root distance, width of IC, and their proximity were estimated using Invivo6 software (Anatomage, San Jose, CA). Results The IC volume was slightly greater among the high angle facial group and female patients than the other groups. Overall, the IC width was greater than the U1 inter-root distance in 55.65%, 57.6%, and 65% among the average, low, and high angle facial groups, respectively, and in 56.5% and 62.9% of males and females, respectively. The overall anteroposterior (sagittal) distances between the U1 roots and IC were 4.36 ± 1.18, 4.78 ± 1.17, and 3.83 ± 0.90 mm among the average, low, and high angle facial groups, respectively. Conclusions The high angle facial group and female patients showed slightly greater IC dimensions than the other groups. The overall maximum sagittal distances between the U1 and IC were around 5.5, 6, and 4.7 mm among the average, low, and high angle facial groups, respectively. The low angle facial group and male patients tended to have greater sagittal distances. Therefore, the present findings could serve as a guideline when a considerable amount of upper incisor retraction is planned for Class I or II maxillary or bimaxillary dentoalveolar protrusion patients.

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Section: Discussionmentioning

confidence: 98%

Proximity of upper central incisors to incisive canal among subjects with maxillary dentoalveolar protrusion in various facial growth patterns:

Al-Rokhami¹,

Sakran²,

Alhammadi³

et al. 2022

The Angle Orthodontist

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“…2023, 13, 6899 2 of 11 maxillary artery [22][23][24][25][26][27][28]. Because the IC is located between the palatine cortical plate and MCI, the presence and morphometric properties of the IC should also be included as essential components of the treatment planning procedure [29,30].…”

Section: Introductionmentioning

confidence: 99%

“…Maxillary incisor retraction is presumed to influence MCI invasion into the IC, and the thrust into the IC or contact between the peri-cortical bone of the IC and tooth root induces root resorption [7,9,20,[30][31][32][33]. According to radiographic examination, the IC is surrounded by a radiopaque cortex, shown as a well-defined radiopaque area [28].…”

Section: Introductionmentioning

confidence: 99%

Factors Associated with the Proximity of the Incisive Canal to the Maxillary Central Incisor

2023

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The position of the maxillary central incisors (MCIs) is an important factor in treatment planning since it is related to esthetics and physiological function. This study aimed to evaluate maxillofacial morphology related to the proximity of the MCI to the incisive canal (IC) using cone-beam computed tomography (CBCT). In 157 patients, the distance between the MCI and IC was measured using CBCT images, and the maxillofacial morphology was measured using cephalograms. The relationship between age, sex, and cephalometric analysis was subsequently investigated using stepwise multiple regression analysis, with the distance between the MCI root apex and IC as the objective variable, and age, sex, and cephalometric variables as explanatory variables. The results demonstrated significant associations between the distance separating point A and the pterygomaxillary fissure projected on the palatal plane (B = 0.092, p < 0.01), the maxillary central incisal edge to the Frankfort horizontal plane (B = −0.058, p < 0.01), and the mandibular plane (B = −0.036, p = 0.031). Age and sex showed no association with the distance between the IC and MCI. Particular attention should be paid to the proximity of the tooth root to the IC in patients with short anteroposterior diameters of the maxilla and an anterior labial tilt of the dolichofacial type.

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“…The results of earlier studies confirmed that the palatal cortical plate was a limiting (anatomical) factor for MCI retractions [ 16 , 17 , 18 , 19 ]. However, since NPC is located between the palatal cortical plate and central incisors, it is not surprising why recent studies [ 20 , 21 ] have shown that their presence and morphometric characteristics should be also included as one of the key factors in planning procedures accompanied by teeth movement in the anterior maxilla in order to avoid contact of MCIs and NPC and even invasion into NPC [ 21 ]. Thus, Yu and collaborators noted that root retraction above 4 mm resulted in NPC invasion in 54% of patients [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, since NPC is located between the palatal cortical plate and central incisors, it is not surprising why recent studies [ 20 , 21 ] have shown that their presence and morphometric characteristics should be also included as one of the key factors in planning procedures accompanied by teeth movement in the anterior maxilla in order to avoid contact of MCIs and NPC and even invasion into NPC [ 21 ]. Thus, Yu and collaborators noted that root retraction above 4 mm resulted in NPC invasion in 54% of patients [ 21 ]. Furthermore, Chung and coworkers [ 22 ] found a direct correlation between the degree of NPC invasion and severity of root resorption (the largest degree of NPC invasion presented at 6.2 mm of root resorption).…”

Section: Introductionmentioning

confidence: 99%

The Shape of Nasopalatine Canal as a Determining Factor in Therapeutic Approach for Orthodontic Teeth Movement—A CBCT Study

et al. 2021

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The aim of this study was to evaluate the impact of the nasopalatine canal (NPC) shape and its morphometric characteristics on expected teeth movement by assessing the distance to maxillary central incisors (MCIs) according to NPC type. The retrospective study was performed on 133 CBCT images. The following parameters were obtained: the antero-posterior diameter (A-P) of the nasal foramen (NF), canal length, A-P and mediolateral diameter (M-L) of the incisive foramen (IF), and the distance between NPC and MCIs. With the exception of being hourglass-shaped, each NPC shape showed specific impacts of NPC shape on the relationship between NPC diameters at different sections and distances to MCIs. In banana-shaped NPC, a significant correlation was observed for A-P NF diameter, while in cylindrical-shaped NPC, a significant correlation was observed for NPC length. The increase in M-L IF, A-P IF, A-P NF, and NPC length in funnel-shaped NPC may be a risk factor for interventions that could result in teeth movement. According to the results, it seems that the proposed methodological approach for analysis of CBCT slices in the anterior maxilla may offer detailed information that could be an additional tool in planning the procedures that result in expected teeth movement.

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Morphologic changes of the incisive canal and its proximity to maxillary incisor roots after anterior tooth movement

Cited by 10 publications

References 33 publications

Proximity of upper central incisors to incisive canal among subjects with maxillary dentoalveolar protrusion in various facial growth patterns:

Proximity of upper central incisors to incisive canal among subjects with maxillary dentoalveolar protrusion in various facial growth patterns:

Factors Associated with the Proximity of the Incisive Canal to the Maxillary Central Incisor

The Shape of Nasopalatine Canal as a Determining Factor in Therapeutic Approach for Orthodontic Teeth Movement—A CBCT Study

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