Root surface areas of maxillary permanent teeth in anterior normal overbite and anterior open bite assessed using cone-beam computed tomography

Suteerapongpun, Piyadanai; Sirabanchongkran, Supassara; Wattanachai, Tanapan; Sriwilas, Patiyut; Jotikasthira, Dhirawat

doi:10.5624/isd.2017.47.4.241

Cited by 6 publications

(8 citation statements)

References 12 publications

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“…A recent study using CBCT reported that root surface areas of maxillary incisors are smaller in open bite individuals, when compared to controls without open bite. 11 They attributed their results to the occlusal hypofunction mentioned above, and speculated that some abnormal pressure from a tongue thrusting habit could cause root resorption of these teeth. Nevertheless, their sample size and age range were smaller than in the present study, and it may have influenced their results.…”

Section: Discussionmentioning

confidence: 99%

“…However, the root length was not directly measured. 8,9 In addition, only two studies that evaluated dental root length in panoramic radiographs 10 and root area in CBCT 11 concluded that patients with open bite, especially those with a high mandibular plane angle, have shorter dental roots and smaller root areas of the maxillary incisors, when compared to individuals with normal overbite. These studies mention that their findings may be related to the loss of occlusal contact in the anterior teeth.…”

Section: Introductionmentioning

confidence: 99%

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Incisor root length in individuals with and without anterior open bite: a comparative CBCT study

Arriola-Guillén

Valera-Montoya

Rodríguez-Cárdenas

et al. 2020

Dental Press J. Orthod.

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Objective: This study aimed to compare the root length of maxillary and mandibular incisors between individuals with open bite versus matched individuals with adequate overbite. Methods: This comparative, matched and retrospective study included 48 cone beam computed tomographies (CBCTs) obtained at a university radiological center. Scans belonged to 24 individuals with open bite (overbite ≤ 0 mm) and 24 individuals with adequate overbite (controls). Both groups were matched by age, sex, malocclusion classification and skeletal characteristics (ANB and FMA angles). Root length of each maxillary and mandibular incisor was measured in millimeters (mm) in a sagittal section from a perpendicular line to the enamel cement junction until the root apex (384 length measurements were made). The means of root length in both groups were compared using t-tests. In addition, correlations between variables were evaluated with the Pearson correlation coefficient (α = 0.05). Results: In both groups, the root length of the upper central incisors was approximately 12 mm and the root length of the maxillary lateral incisors was approximately 13 mm (p˃ 0.05). Likewise, the root length of lower central incisors in both groups measured approximately 12 mm (p˃ 0.05). However, the mandibular lateral incisor roots of open bite patients were significantly longer than in the normal overbite patients (approximately 1 mm, p= 0.012 right side, p= 0.001 left side). Conclusions: Root length of maxillary incisors and central mandibular incisor is similar in individuals with or without open bite, but the mandibular lateral incisor roots in open bite patients were significantly longer than in the normal overbite patients.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Incisor root length in individuals with and without anterior open bite: a comparative CBCT study

Arriola-Guillén

Valera-Montoya

Rodríguez-Cárdenas

et al. 2020

Dental Press J. Orthod.

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“…CBCT and micro-CT images were converted from Digital Imaging and Communications in Medicine (DICOM) format to stereolithography (STL) format using Mimics Research 15.01 simulation software (Materialise, Leuven, Belgium) in accordance with previously described methods. 3 11 The resulting 3-dimensional tooth model was saved in STL format before being imported into the 3-Matic Research 7.01 software (Materialise). The cemento-enamel junction (CEJ) was manually identified, and the RSA was automatically measured using 3-Matic Research software ( Fig.…”

Section: Methodsmentioning

confidence: 99%

Effects of the cone-beam computed tomography protocol on the accuracy and image quality of root surface area measurements: An in vitro study

Intarasuksanti,

Prapayasatok,

Kampan

et al. 2023

Imaging Sci Dent

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Purpose The objective of this study was to evaluate and compare the accuracy and image quality of root surface area (RSA) measurements obtained with various cone-beam computed tomography (CBCT) protocols, relative to the gold standard of micro-computed tomography (CT), in an in vitro setting. Materials and Methods Four dry human skulls were scanned using 8 different protocols, with voxel sizes of 0.15 mm, 0.3 mm, and 0.4 mm. Three-dimensional models of the selected teeth were constructed using CBCT and micro-CT protocols, and the RSA was automatically measured by the image-processing software. The absolute difference in the percentage of the RSA (%ΔRSA) was calculated and compared across the 8 CBCT protocols using repeated-measures analysis of variance. Finally, image quality scores of the RSA measurements were computed and reported in terms of percent distribution. Results No significant differences were observed in the %ΔRSA across the 8 protocols ( P >0.05). The deviation in %ΔRSA ranged from 1.51% to 4.30%, with an increase corresponding to voxel size. As the voxel size increased, the image quality deteriorated. This decline in quality was particularly noticeable at the apical level of the root, where the distribution of poorer scores was most concentrated. Conclusion Relative to CBCT protocols with voxel sizes of 0.15 mm and 0.3 mm, the protocols with a voxel size of 0.4 mm demonstrated inferior image quality at the apical levels. In spite of this, no significant discrepancies were observed in RSA measurements across the different CBCT protocols.

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“…The dental roots of maxillary central incisors in patients with anterior open bite have been reported to be short, which may be related to the loss of occlusal contact (Uehara et al, 2013). The previous study reported that the root surface areas of the maxillary central and lateral incisors in the anterior open bite group were significantly lower than in the normal overbite group (Suteerapongpun et al, 2017). In the present study, the measurements of tooth volume and root volume in the anterior open bite group were found to be significantly lower, and the pulp cavity volume and root canal volume ratio were significantly higher than the anterior normal overbite group.…”

Section: Comparison With Other Studiesmentioning

confidence: 98%

“…in open bite malocclusion) are so-called hypofunctional teeth. Atrophic changes have been reported in the periodontium of hypofunctional teeth, including reduced alveolar bone mass, narrow periodontal ligament space, reduced root surface areas and structural changes of the gingiva (Motokawa et al, 2013a; Steigman et al, 1989; Suteerapongpun et al, 2017). Moreover, hypofunctional teeth are more prone to abnormal root shapes and root resorption compared to functional teeth (Motokawa et al, 2013b).…”

Section: Introductionmentioning

confidence: 99%

Effect of occlusal hypofunction on centre of resistance in maxillary central incisor using the finite element method

et al. 2023

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Objectives: To determine differences in the location of centre of resistance (Cres) between functional and hypofunctional teeth and to evaluate the relationship between the pulp cavity volume and locations of the Cres, using the finite element (FE) method. Design: Retrospective cohort study. Participants: FE models of right maxillary central incisor, derived from cone-beam computed tomography (CBCT) images of 46 participants, were divided into normal function (n = 23) and hypofunction (n = 23) groups using anterior overbite and cephalometric measurements. Methods: Measurements of the tooth and pulp cavity volume were made from CBCT. Cres levels were presented as percentages of the root length from the root’s apex. All data were analysed and compared using the independent t-test ( P < 0.05). The relationship between the location of Cres and volume ratios were evaluated statistically. Results: The means of the pulp cavity/tooth volume and root canal/ root volume ratio of the maxillary central incisor in anterior open bite group were significantly greater than those in the normal group. The average location of Cres in the anterior open bite group was 0.6 mm (3.7%) apically from the normal group, measured from root apex. The difference was statistically significant ( P < 0.01). There was a significant correlation between root canal/root volume ratio and locations of Cres (r = −0.780, P < 0.001). Conclusions: The Cres in the hypofunctional group was located more apical than the functional group. As the pulp cavity volume increased, the levels of Cres apically shifted.

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Root surface areas of maxillary permanent teeth in anterior normal overbite and anterior open bite assessed using cone-beam computed tomography

Cited by 6 publications

References 12 publications

Incisor root length in individuals with and without anterior open bite: a comparative CBCT study

Incisor root length in individuals with and without anterior open bite: a comparative CBCT study

Effects of the cone-beam computed tomography protocol on the accuracy and image quality of root surface area measurements: An in vitro study

Effect of occlusal hypofunction on centre of resistance in maxillary central incisor using the finite element method

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