Application of 3D tooth model for monitoring of implant space and inter-root distance without radiographs: a proof of concept study

Abstract Background Radiographs are integral in evaluating implant space and inter-root distance. The purpose of this report is to introduce a method for evaluating the 3D root position with minimal radiation using a 3D tooth model composed of an intraoral-scanned crown and a cone-beam computed tomography (CBCT)-scanned root. Materials and methods Intraoral scan and CBCT scan of the patient were obtained before treatment. In the CBCT image, tooth segmentation was performed by isolating individual teeth from the maxillary and mandibular alveolar bone using software program. The 3D tooth model was fabricated by combining segmented individual teeth with the intraoral scan. Results A post-treatment intraoral scan was integrated into the tooth model, and the resulting position of the root could be predicted without additional radiographs. It is possible to monitor the root position after a pretreatment CBCT scan using a 3D tooth model without additional radiographs. Conclusion The application of the 3D tooth model benefits the patient by reducing repeated radiation exposure while providing the clinician with a precise treatment evaluation to monitor tooth movement.

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Application of 3D tooth model for monitoring of implant space and inter-root distance without radiographs: A proof of concept study

10.21203/rs.3.rs-20887/v1 ◽

2020 ◽

Author(s):

Mirinae Park ◽

Kyung-Min Lee

Keyword(s):

Radiation Exposure ◽

Alveolar Bone ◽

Tooth Movement ◽

Treatment Evaluation ◽

Post Treatment ◽

Proof Of Concept ◽

Concept Study ◽

Cbct Image ◽

Software Program ◽

Root Position

Abstract Background Radiographs are integral for evaluating of implant space and inter-root distance. The purpose of this report is to introduce a method for evaluating 3D root position with minimal radiation using 3D tooth model which is composed of intraoral-scanned crown and CBCT-scanned root. Materials and methods An intraoral scan and CBCT scan of the patient were obtained before treatment. In the CBCT image, tooth segmentation was performed by isolating individual tooth from the maxillary and mandibular alveolar bone using software program. By combining segmented individual tooth with the intraoral scan, consequently, 3D tooth model was fabricated. Results After treatment, the additional intraoral scan at post-treatment was integrated into the tooth model and the resulting position of the root could be predicted without additional radiographs. It is possible to monitor the root position using 3D tooth model without the need for additional radiographs after a pretreatment CBCT scan. Conclusion The application of 3D tooth model benefits the patient by reducing radiation exposure while providing the clinician with a precise treatment evaluation for monitoring tooth movement.

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Analysis of the root position of the maxillary incisors in the alveolar bone using cone-beam computed tomography

Imaging Science in Dentistry ◽

10.5624/isd.2017.47.3.181 ◽

2017 ◽

Vol 47 (3) ◽

pp. 181 ◽

Cited By ~ 3

Author(s):

Yun-Hoa Jung ◽

Bong-Hae Cho ◽

Jae Joon Hwang

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Alveolar Bone ◽

Cone Beam ◽

Root Position ◽

Maxillary Incisors

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Volumetric evaluation of root resorption on the upper incisors using cone beam computed tomography after 1 year of orthodontic treatment in adult patients with marginal bone loss

The Angle Orthodontist ◽

10.2319/121717-868.1 ◽

2018 ◽

Vol 88 (6) ◽

pp. 710-718 ◽

Cited By ~ 3

Author(s):

Pornputthi Puttaravuttiporn ◽

Mutita Wongsuwanlert ◽

Chairat Charoemratrote ◽

Chidchanok Leethanakul

Keyword(s):

Computed Tomography ◽

Bone Loss ◽

Cone Beam Computed Tomography ◽

Orthodontic Treatment ◽

Alveolar Bone ◽

Tooth Movement ◽

Root Resorption ◽

Cone Beam ◽

Volume Loss ◽

Root Volume

ABSTRACTObjectives:To determine upper incisor root resorption, volume loss, and the relationship between root volume loss and tooth movement after 1 year of orthodontic treatment in patients with marginal bone loss.Materials and Methods:A total of 30 women (46.3 ± 5.4 years old) with moderate upper incisor bone loss who required intrusion during orthodontic treatment were recruited. Pre- and post-treatment cone beam computed tomography images were reconstructed. Upper incisors at pre- and post-treatment were superimposed; labio- and palato-apical, middle, and coronal third root volumes were assessed. Tooth movement and alveolar bone height were measured from lateral cephalometric radiographs and cone beam computed tomography. Changes in root volume/alveolar bone height were compared using paired-sample t-tests, percentage root volume loss for each tooth/segment was evaluated by one-way analysis of variance, and the relationship between percentage root loss and degree of tooth movement was assessed by linear regression.Results:Mean root volume significantly decreased on the labio- and palato-apical aspects of 12 and labio-apical aspects of 21 and 22 (P ≤ .024). Palato-apical segment volume loss was greater on lateral than central incisors (P ≤ .016). Two-dimensional root length and cementoenamel junction-bone crest distance did not change between T0 and T1, with no significant relationship between tooth movement amount and percentage root volume loss.Conclusions:Delivery of 40 g intrusive force to the four upper incisors using a T-loop and the leveling phase lead to more apical root volume loss on lateral than central incisors. There was no relationship between extent of tooth movement and upper incisor root volume loss.

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Alveolar bone heights of maxillary central incisors in unilateral cleft lip and palate patients using cone-beam computed tomography evaluation

Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie ◽

10.1007/s00056-020-00276-w ◽

2021 ◽

Author(s):

Marcin Stasiak ◽

Anna Wojtaszek-Słomińska ◽

Bogna Racka-Pilszak

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Cleft Lip ◽

Cleft Lip And Palate ◽

Alveolar Bone ◽

Contralateral Side ◽

Cone Beam ◽

Rank Test ◽

Cross Sectional ◽

Alveolar Bone Grafting

Abstract Purpose The aims of this retrospective cross-sectional study were to measure and compare labial and palatal alveolar bone heights of maxillary central incisors in unilateral cleft lip and palate patients, following STROBE (Strengthening the Reporting of Observational Studies in Epidemiology) guidelines. Patients and methods The study group consisted of 21 patients with a mean age of 16 years. High-resolution cone-beam computed tomography was performed at least one year after secondary alveolar bone grafting. The experimental side was the cleft side and the contralateral side without congenital cleft was the control. Measurements were performed on incisors’ midsagittal cross-sections. The Wilcoxon signed-rank test was used for intergroup comparisons. Results The labial and palatal distances between alveolar bone crests and cementoenamel junctions were significantly greater on the cleft side than on the noncleft side. Mean differences were 0.75 and 1.41 mm, respectively. The prevalence of dehiscences at the cleft side maxillary central incisors was 52% on the labial surface and 43% on the palatal surface. In the controls, it was 19% and 14%, respectively. Conclusion The cleft-adjacent maxillary central incisors had more apically displaced alveolar bone crests on the labial and palatal sides of the roots than the controls. Higher prevalence of dehiscences was found on the cleft side. Bone margin differences predispose to gingival height differences of the central incisors. These differences could increase the demands of patients to obtain more esthetic treatment results with orthodontic extrusion and periodontal intervention on the cleft side.

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