Evaluation of crown inclination and angulation after orthodontic treatment using digital models

Castro, Iury Oliveira; Gribel, Bruno Frazāo; Alencar, Ana Helena Gonçalves de; Valladares‐Neto, José; Estrela, Carlos

doi:10.1007/s00056-018-0136-2

Cited by 13 publications

(16 citation statements)

References 23 publications

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“…The straight-wire technique, Roth prescription [28], slots 0.022 × 0.028 mm, had been used for their orthodontic therapy, and the outcomes were reported to be in agreement with Andrews's six keys of normal occlusion [29]. The arches sequence was 0.012 NiTi, 0.014 NiTi, 0.016 NiTi, 0.016 stainless steel, 0.018 stainless steel, 0.017 × 0.025 NiTi, 0.018 × 0.025 titanium molybdenum alloy and 0.019 × 0.025 stainless steel.…”

Section: Methodsmentioning

confidence: 64%

Correlation between Dental Vestibular–Palatal Inclination and Alveolar Bone Remodeling after Orthodontic Treatment: A CBCT Analysis

et al. 2019

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The aim of this study was to evaluate the correlation between dental vestibular–palatal inclination changes and the cortical bone remodeling after fixed orthodontic treatment using cone beam computed tomography (CBCT). Twenty-two patients with Angle Class I malocclusion, permanent dentition, and mild to moderate dental crowding were included in the present three-dimensional (3D) analysis. Bone dimensions were evaluated by CBCT scans obtained before and after orthodontic treatment, whereas the torque values were calculated by means of digital models using the 3D VistaDent software. A paired t-test was used to compare the changes between the pretreatment and post-treatment measurements. The correlations between variables were analyzed with linear regression analysis. A significant correlation between torque variations and bone thickness changes was observed for the apical buccal level of the anterior side (P < 0.05). Limited and not significant alveolar bone resorption for the apical thickness of anterior teeth occurred at ± 5 degrees of torque variation, while for tooth inclination exceeding +5 or −5 degrees, the bone remodeling was more evident. The present study demonstrated that anterior region was the most affected area by bone remodeling and that torque variation was highly related to apical bone thickness adaptation for maxillary and mandibular incisors and maxillary canines.

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Section: Methodsmentioning

confidence: 64%

Correlation between Dental Vestibular–Palatal Inclination and Alveolar Bone Remodeling after Orthodontic Treatment: A CBCT Analysis

et al. 2019

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“…Assessment of mesiodistal and buccolingual angulation, needed to guide orthodontic biomechanics and treatment objectives, as proposed by Andrews, 1,2 continues to contribute to the literature until the present days. [3][4][5][6][7][8][9][10][11] Tooth displacement is ruled by the crown and root positions. A correct and accurate understanding of these changes can be extremely helpful in clinical practice, since the ideal treatment goal is to correctly position the whole tooth and not only the clinical crown.…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14] Different methodologies have since then been proposed to assess the mesiodistal and buccolingual angulation in stone casts and, more recently, in digital dental models (DDMs). [6][7][8]12,13 The challenge is to develop an adequate and reproducible method to measure mesiodistal and buccolingual angulation, considering that the buccal crown contour is not a uniform curve and DDMs do not show the tooth root. [12][13][14][15][16][17][18] Conventional radiographs have also been used to assess the changes in mesiodistal and buccolingual angulation.…”

Section: Introductionmentioning

confidence: 99%

Comparison of linear and angular changes assessed in digital dental models and cone‐beam computed tomography

Massaro

Losada

Cevidanes

et al. 2019

Orthod Craniofacial Res

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Objective-To compare the three-dimensional (3D) linear displacements and the mesiodistal and buccolingual angulation changes after orthodontic treatment in digital dental models (DDMs) and 3D models derived from cone-beam computed tomography (CBCT). Settings and Sample Population-Digital dental model and CBCT scans were selected from 24 adults who had undergone orthodontic treatment for mandibular anterior crowding. Material and Methods-3D linear displacements and changes in angular measurements (mesiodistal and buccolingual angulation) were assessed in pre-and posttreatment DDM and CBCT images using the software ITK-snap and 3D SlicerCMF. Intra-and inter-rater agreement of measurements in DDM and CBCT were tested using the intraclass correlation coefficient (ICC).

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“…Malocclusion is regarded as one of the three oral diseases according to the research of the World Health Organization (Cheng et al, 2015;Stewart et al, 2001;Wu., 2018). Digital forming technology is used more and more extensively in the modern field of orthodontics to treat the malocclusion (Schmidt et al, 2018), such as dental 3D digital reconstruction technology, digitalized brackets indirect bonding technology and orthodontics archwire bending robotic technology (Castro et al, 2018). Clinically, orthodontic archwire-assisted forming equipment and orthodontic archwire bending machines have been used to bend orthodontic archwires (Jiang et al, 2018), such as the Suresmile system.…”

Section: Introductionmentioning

confidence: 99%

Digital expression and interactive adjustment method of personalized orthodontic archwire for robotic bending

Jiang

Zuo

et al. 2019

JAMDSM

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The robotic archwire bending technology has been used clinically to free orthodontic doctors from the heavy labor because of the improvement of the digital medical technology, and the digital expression of orthodontic archwire is necessary to realize the robotic archwire bending. Because of the differences between the human tooth arrangement and the difficulty of archwire shape design, it is difficult to realize the digital expression of orthodontic archwire. A method for the digital expression and interactive adjustment of personalized orthodontic archwire is presented in this paper. The straight section and the transitional section of the brackets are defined according to the reference points of the brackets. The transitional sections of the brackets are built by the mathematical model of Cubic Bezier curve. The process of handmade archwire bending, the method of discretization and combination are considered in the establishment of the mathematical model and model library about special function arch curve. The ways of the adjustment of the straight sections, the deformation of the transitional section shape, the selections of the position and type of special function arch curve are used in the study of the method for the digital expression and interactive adjustment of personalized orthodontic archwire. The interactive adjustment software is designed by the LABVIEW software. The archwire bending experiment is carried out, the error rate of the bent archwire ranged between 1.1% and 6.7% which proves the digital expression and interactive adjustment method of personalized orthodontic archwire for robotic bending is feasible and effective.

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Evaluation of crown inclination and angulation after orthodontic treatment using digital models

Abstract: Crown inclination and angulation found at the end of orthodontic treatment did not match the prescription of the brackets for most teeth, as measured using digital models.

Cited by 13 publications

References 23 publications

Correlation between Dental Vestibular–Palatal Inclination and Alveolar Bone Remodeling after Orthodontic Treatment: A CBCT Analysis

Correlation between Dental Vestibular–Palatal Inclination and Alveolar Bone Remodeling after Orthodontic Treatment: A CBCT Analysis

Comparison of linear and angular changes assessed in digital dental models and cone‐beam computed tomography

Digital expression and interactive adjustment method of personalized orthodontic archwire for robotic bending

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