Rapid 3D mandibular superimposition for growing patients

Koerich, Leonardo B.; Weissheimer, André; Menezes, Luciane Macedo de; Lindauer, Steven J.

doi:10.2319/072316-574.1

Cited by 25 publications

(28 citation statements)

References 19 publications

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“…In cone-beam computed tomography (CBCT) studies, 17,18 voxel-based three-dimensional (3D) superimposition methods were introduced to minimize measurement error, and they were reported as suitable for research in both growing and grown patients. The immediate effects of transverse skeletal and dentoalveolar changes in tooth-borne and bone-borne expenders have already been compared in a previous CBCT study.…”

Section: Introductionmentioning

confidence: 99%

Molar Inclination and Surrounding Alveolar Bone Change Relative To the Design of Bone-borne Maxillary Expanders: A Cbct study

Moon¹,

Kim²,

Ahn³

et al. 2019

The Angle Orthodontist

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Objective: To evaluate the molar inclination and skeletal and alveolar bone changes when comparing tooth bone-borne (MSE) and tissue bone-borne type maxillary expanders (C-expander) using cone-beam computed tomography (CBCT) in late adolescence. Materials and Methods: A sample of 48 late-adolescent patients were divided into two groups according to the type of expander: MSE group (n = 24, age = 19.2 ± 5.9 years) and C-expander group (n = 24, age = 18.1 ± 4.5 years). CBCT scans were taken before treatment and 3 months after expansion. Transverse skeletal and dental expansion, alveolar inclination, tooth axis, buccal alveolar bone height, thickness, dehiscence, and fenestration were evaluated on the maxillary first molar. Paired t-test, independent t-test, Pearson's chi-square test, and Spearman correlation analysis were performed. Results: The MSE group produced greater dental expansion (P < .05), whereas skeletal expansion was similar in both groups (P = .859). The C expander group had more alveolar bone inclination change (P < .01), and the MSE group had more buccal tipping of the anchorage teeth (P < .01 or .001). Buccal alveolar bone height loss and thickness changes were greater in the MSE group (P < .01 or <.001). Formation of dehiscences was more frequent in the MSE group (P < .001), whereas for fenestrations, there were no significant differences between the two groups. Buccal bone height loss in the MSE group had a negative correlation with initial buccal bone thickness. Conclusions: The incorporation of teeth into bone-borne expanders resulted in an increase in the severity of side effects. For patients in late adolescence, tissue bone-borne expanders offer comparable skeletal effects to tooth bone-borne expanders, with fewer dentoalveolar side effects.

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Section: Introductionmentioning

confidence: 99%

Molar Inclination and Surrounding Alveolar Bone Change Relative To the Design of Bone-borne Maxillary Expanders: A Cbct study

Moon¹,

Kim²,

Ahn³

et al. 2019

The Angle Orthodontist

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“…The morphological development of the mandible has been mainly investigated through subjective analysis with the superimposition of 2D images (Björk, ; Solow & Kreiborg, ) or 3D models (Koerich, Weissheimer, de Menezes, & Lindauer, ; Nguyen, Cevidanes, Franchi, Ruellas, & Jackson, ). These studies have provided some information about bone remodeling being a major factor of mandibular development: the mandible changes both in terms of size and global morphology through the activities of osteoblasts and osteoclasts (D. Enlow, ; Nguyen et al, ).…”

Section: Introductionmentioning

confidence: 99%

Morphometric characterization of the very young child mandibular growth pattern: What happen before and after the deciduous dentition development?

Remy

Godio‐Raboutet

Captier

et al. 2019

American J Phys Anthropol

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Objectives: Numerous tools have been developed to characterize the morphometry of 3D models. The aim of this study was to apply these techniques to better understand the morphometric growth pattern of healthy children's mandibles. Material and Methods:The study sample was composed of 480 very young children aged from 36 gestational weeks to 7 years old. The sample was divided into three subsamples according to the development stages of their deciduous dentition. Several biometric data were collected on 3D mandibular models.Results: There was homothetic growth during the first years of life. Once all deciduous teeth were fully erupted, the mandibular corpus warped more independently of the ramus, and the inter-individual variability was more pronounced. Throughout the growth period, several subgroups could be identified, highlighting the morphological growth pattern of the mandible. Conclusions:A particular morphogenesis of the mandible during the growth period was observed, which was correlated with deciduous dentition development. In younger individuals, this morphological pattern was mainly characterized by the progressive closure of the chin symphysis and ramus growth. The tongue movements in the oral space, depending on whether the child was bottle-or breast-fed, may explain this result. As the children grew older, the mandible widened to create sufficient space for the developing teeth buds. During the eruption of deciduous dentition, the mandible took on various morphologies, which was likely based on the child's sex and diet. Therefore, we assume that this mandibular morphogenesis is induced by the functional strains affecting the mandible during deciduous teeth development. K E Y W O R D Sdeciduous dentition development,

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“…Ruellas et al [4] suggested superimposing the mandible in growing patients on the mandibular body (mandible without teeth, alveolar bone, rami and condyles) using 3D regional registration. Koerich et al [11] showed that this was a precise method for 3D mandibular superimposition in growing subjects.…”

Section: Discussionmentioning

confidence: 99%

The three-dimensional stable mandibular landmarks in patients between the ages of 12.5 and 17.1 years

Chen

Awadi²,

Chambers³

et al. 2020

Preprint

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Background: With the aid of implants, Björk identified two-dimensional mandibular stable structures in cephalograms during facial growth. However, we do not know what the three-dimensional stable structures are with certainty. The purpose of this study was to identify the most stable mandibular landmarks in growing patients using three-dimensional images.Methods: The sample was comprised of two cone-beam computed tomography (CBCT) scans taken about 4.6 years apart in 20 growing patients between the ages of 12.5 (T1) and 17.1 years (T2). After head orientation, landmarks were located on the chin (Pog), internal symphysis (Points C, D and E), and mandibular canals, which included the mental foramina (MF and MFA) and mandibular foramina (MdF). The linear distance change between Point C and these landmarks was measured on each CBCT to test stability through time. The reliability of the suggested stable landmarks was also evaluated. Results: The total distance changes between Point C and points D, E, Pog, MF, and MFA were all less than 1.0 mm from T1 to T2. The reliability measures of these landmarks, which were measured by the Cronbach alpha, were above 0.94 in all three dimensions for each landmark. From T1 to T2, the distance changes from Point C to the right and left mandibular foramina were 3.39±3.29 mm and 3.03±2.83 mm, respectively. Conclusions: During a growth period that averaged 4.6 years, ranging from 11.2 to 19.8 years old, the structures that appeared relatively stable and could be used in mandibular regional superimpositions included Pog, landmarks on the inferior part of the internal symphysis, and the mental foramen. The centers of the mandibular foramina and the starting points of the mandibular canal underwent significant changes in the transverse and sagittal dimensions.

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Rapid 3D mandibular superimposition for growing patients

Abstract: The rapid superimposition was precise for assessing dentoalveolar changes and structures close to the registration area. However, evaluation of the condyles and ramus area had limitations and needs improvement.

Cited by 25 publications

References 19 publications

Molar Inclination and Surrounding Alveolar Bone Change Relative To the Design of Bone-borne Maxillary Expanders: A Cbct study

Molar Inclination and Surrounding Alveolar Bone Change Relative To the Design of Bone-borne Maxillary Expanders: A Cbct study

Morphometric characterization of the very young child mandibular growth pattern: What happen before and after the deciduous dentition development?

The three-dimensional stable mandibular landmarks in patients between the ages of 12.5 and 17.1 years

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