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Hayashi A, Fushima K, Arisaka H. Evaluating the long-term stability of a predefined palatal region for tooth movement analysis. J Dent 2024; 149:105230. [PMID: 39059706 DOI: 10.1016/j.jdent.2024.105230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 07/04/2024] [Accepted: 07/09/2024] [Indexed: 07/28/2024] Open
Abstract
OBJECTIVES We conducted a three-dimensional (3D) analysis of orthodontic tooth movement (TM) using digital dental models (DMs), focusing on the palatal region of interest (PROI), aiming to evaluate the long-term stability of the PROI, validate the 3D TM analysis with PROI registration, and compare it with conventional lateral cephalometric analyses. METHODS Twenty adult patients treated with a multibracket appliance were evaluated at their first visit (T0) and at least 5 years later (T1) using DMs and lateral cephalograms (LCs). The long-term stability of PROI was assessed by calculating the point cloud distances between DM-T0 and DM-T1. TM analysis using DM with PROI registration for the maxillary central incisors was assessed through linear and angular measurements in the sagittal view and subsequently compared with the LCs. RESULTS The average point cloud distance of the PROI between DM-T0 and DM-T1 was 0.21 mm (standard deviation, 0.13 mm). TM analysis using DMs demonstrated excellent reproducibility for both linear and angular measurements (intra-rater correlation coefficient, > 0.99). The 95 % limits of agreement between the DM and LC measurements were < 5.14° for angular change, 3.53 mm for horizontal displacement, and 0.98 mm for vertical displacement. No significant differences were observed in the angular and linear measurements when the TM was compared using the DMs and LCs. CONCLUSIONS The PROI remained stable for over 5 years, supporting the reproducibility and accuracy of TM assessment using PROI registration in orthodontic clinical practice. CLINICAL SIGNIFICANCE DM analysis lacks the risks associated with X-ray exposure and can be easily performed in daily clinical practice, indicating its potential for future clinical applications. These findings further support the use of DM with PROI registration for TM analysis in orthodontic clinical practice, emphasizing its long-term stability and reproducibility.
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Affiliation(s)
- Atsushi Hayashi
- Graduate School of Dentistry, Department of Anesthesiology, Kanagawa Dental University, Turuya-cho 3-31-6, Kanagawa-ku, Yokohama, Kanagawa, Japan 221-0835
| | - Kenji Fushima
- Kanagawa Dental University, Inaoka-cho 82, Yokosuka, Kanagawa, Japan 238-0003.
| | - Hirofumi Arisaka
- Department of Anesthesiology, Kanagawa Dental University, Turuya-cho 3-31-6, Kanagawa-ku, Yokohama, Kanagawa, Japan 221-0835
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Meade MJ, Weir T, Byrne G. Comparison of digital study model superimposition methods using implant-supported crowns and best-fit algorithms. Am J Orthod Dentofacial Orthop 2024; 166:384-392.e2. [PMID: 39046381 DOI: 10.1016/j.ajodo.2024.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 06/01/2024] [Accepted: 06/01/2024] [Indexed: 07/25/2024]
Abstract
INTRODUCTION Research regarding orthodontic changes using the superimposition of digital study models (DSMs) is commonplace. Information regarding the accuracy of data processing by superimposition software is limited. The study aimed to compare different methods of superimposing DSMs using implant-supported crowns (ISC) as a stable reference structure. METHODS DSMs containing ISCs were sourced from a database of patients treated with clear aligner therapy. The DSM representing the planned treatment outcome was superimposed on the pretreatment DSM. Three tooth points were selected for comparison on the contralateral side of each ISC. Differences in Cartesian coordinates for each tooth point for each arch superimposition method, used by the Geomagic Control X (3D systems, Rock Hill, NC) software system, were recorded. Paired t tests for the reference standard superimposition method best-fit high-resolution using the entire dental arch compared with initial, best-fit low-resolution, and best-fit high-resolution using the ISC only were calculated. RESULTS The DSMs of 54 dental arches containing ISCs were evaluated. All mean differences for displacements of selected points on the contralateral side to the ISC in the 3 Cartesian planes were <0.05 mm (P <0.05) and below the threshold of clinical significance. In addition, the standard superimposition techniques (initial, best-fit low-resolution, and best-fit high-resolution) resulted in nonstatistically significant and nonclinically significant differences in the position of the ISC. CONCLUSIONS Researchers can be confident that the described superimposition methodologies, with and without ISCs as a stable reference structure, are a valid method for accurately assessing most intraarch dental changes.
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Affiliation(s)
- Maurice J Meade
- Orthodontic Unit, Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia.
| | - Tony Weir
- Orthodontic Unit, Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia
| | - Graeme Byrne
- La Trobe University Statistics Consultancy Platform, Melbourne, Victoria, Australia
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Kubota R, Fushima K, Arisaka H. Analysis of Three-Dimensional Tooth Movement: A Comparative Study Between Digital Dental Models and Craniofacial Models. Cureus 2024; 16:e67094. [PMID: 39286703 PMCID: PMC11405094 DOI: 10.7759/cureus.67094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/17/2024] [Indexed: 09/19/2024] Open
Abstract
OBJECTIVE This study aims to validate the efficacy of using a digital dental model (DM) with reference to the palatal region of interest (PROI) for assessing orthodontic tooth movement (TM) by comparing it with the analysis of a computed tomography (CT) model with reference to the cranial region of interest (CROI). MATERIALS AND METHODS Thirty-four patients (mean age: 21 years and 11 months) with jaw deformities underwent DM and CT scans before and after presurgical orthognathic treatment. Linear and angular measurements during TM were conducted in three dimensions using both DM and CT to assess reliability. RESULTS DM analysis with PROI registration exhibited high levels of reproducibility, with minimal standard errors in X, Y, and Z displacements (<0.15 mm) and 0.43 degrees in angular change. CT analysis with CROI registration demonstrates similarly high reproducibility, with standard errors inferior to DM analysis (<0.20 mm). Bland-Altman analysis indicated agreement in linear changes of each X, Y, and Z displacement between DM and CT measurements, with limits of agreement (LOA) below 0.91 mm. CONCLUSIONS The results of this study suggest that the PROI, focusing on the third palatal rugae and the horizontal part of the palatal vault, serves as a reliable reference region for evaluating three-dimensional (3D) tooth movement. CLINICAL SIGNIFICANCE Digital dental models offer distinct advantages including the absence of X-ray exposure, no metal artifacts, and the ability to generate high-resolution 3D models. The methodology demonstrated high precision and reproducibility, supporting its potential clinical utility in orthodontic treatment planning and assessment.
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Affiliation(s)
- Rie Kubota
- Department of Anesthesiology, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, JPN
| | - Kenji Fushima
- Dentistry and Orthodontics, Kanagawa Dental University, Yokosuka, JPN
| | - Hirofumi Arisaka
- Department of Anesthesiology, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, JPN
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Corte-Real A, Ribeiro R, Machado R, Silva AM, Nunes T. Digital intraoral and radiologic records in forensic identification: Match with disruptive technology. Forensic Sci Int 2024; 361:112104. [PMID: 38936201 DOI: 10.1016/j.forsciint.2024.112104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 06/07/2024] [Accepted: 06/11/2024] [Indexed: 06/29/2024]
Abstract
While clinical dentistry has seamlessly integrated the digital revolution, there is a gap in the technological capabilities of forensic dentistry.The study aimed to compare the superimposition accuracy of two different three-dimensional record formats, namely the intraoral scanner and cone beam computer tomography, in the context of forensic identification.The sample consisted of randomly selected adults (n=10) of both sexes aged between 20 and 50 years. Following the acquisition of data using the Medit i700 wireless scanner and the iCAT Tomograph with InVivo software, the records were analysed and compared through superimposition using Medit Scan Clinic software to assess the technical precision of anatomical identification details.The results obtained through the superimposition of dental and bone records following intra- and inter-observer analysis enabled an accurate comparison and identification of an individual. This method can differentiate between positive and negative matches, achieving exclusion results and offering a potential solution to overcoming the absence of a standardisation procedure in human identification.
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Affiliation(s)
- Ana Corte-Real
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
| | - Rita Ribeiro
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
| | - Ricardo Machado
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
| | - Ana Mafalda Silva
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
| | - Tiago Nunes
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
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Holz IS, Carvalho FAR, Almeida RCC. Superimposition of virtual models using palatal rugae and maximum habitual intercuspation. Dental Press J Orthod 2024; 29:e24spe2. [PMID: 38775602 PMCID: PMC11104951 DOI: 10.1590/2177-6709.29.2.e24spe2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 03/20/2024] [Indexed: 05/25/2024] Open
Abstract
INTRODUCTION The superimposition of 3 dimensions (3D) digital models has been increasingly used for evaluating dental changes resulting from orthodontic treatment, and different superimposition techniques have been described. Although the maxilla has areas with greater stability for superimposition, such as the palatal rugae, there is still no reliable method for superimposing models of the lower arch. OBJECTIVE Therefore, this article aims to describe a technique for superimposing virtual models. METHODS To evaluate pre- and post-orthodontic treatment changes, the Geomagic Qualify 2013 software (3D Systems®, Rock Hill, South Carolina, USA) was used, with reference points in the maxilla, including the rugae and a reference area in the palate and midpalatal raphe. The lower arch was superimposed using the maximum habitual intercuspation (MHI) model as reference. RESULTS AND CONCLUSION 3D models superimposition using palatal rugae and MHI occlusion seems to offer satisfactory results in the interpretation of clinical changes at different follow-up moments in terms of development and/or orthodontic treatment.
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Affiliation(s)
- Isabella Simões Holz
- Rio de Janeiro State University, Faculty of Dentistry, Department of Orthodontics (Rio de Janeiro/RJ, Brazil)
| | - Felipe A R Carvalho
- Rio de Janeiro State University, Faculty of Dentistry, Department of Orthodontics (Rio de Janeiro/RJ, Brazil)
| | - Rhita C C Almeida
- Rio de Janeiro State University, Faculty of Dentistry, Department of Orthodontics (Rio de Janeiro/RJ, Brazil)
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Hage L, Kmeid R, Amm E. Comparison between 2D cephalometric and 3D digital model superimpositions in patients with lateral incisor agenesis treated by canine substitution. Am J Orthod Dentofacial Orthop 2024; 165:93-102. [PMID: 37737803 DOI: 10.1016/j.ajodo.2023.07.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 07/01/2023] [Accepted: 07/01/2023] [Indexed: 09/23/2023]
Abstract
INTRODUCTION This study aimed to assess the reliability of measurements obtained after superimposing 3-dimensional (3D) digital models by comparing them with those obtained from lateral cephalometric radiographs in patients with lateral agenesis space closure by mesialization. METHODS Data were collected from premaxillary and postmaxillary dental casts and lateral cephalometric radiographs of 26 patients presenting lateral incisor agenesis and treated with rapid maxillary expanders and space closure by mesialization of the lateral sectors. Sagittal and vertical movements of the incisors and the maxillary molars were evaluated with lateral cephalometric radiographs and digitized 3D models superimposed on the palatal area. Paired sample t tests were used to determine if any significant difference existed between the 2 measuring techniques and between 2 different localizations of superimpositions. RESULTS Cephalograms and 3D digital model measurements were statistically similar in molars and incisor movements according to anteroposterior and vertical planes. Regarding incisor movements in the anteroposterior plane, measurements derived from second ruga 3D models were significantly greater than those derived from third ruga 3D digital models. CONCLUSIONS The 3D model superimposition method using the palate as a reference area is clinically reliable for assessing anteroposterior and vertical tooth movement as cephalometric superimposition in patients treated with rapid maxillary expanders and space closure by mesialization.
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Affiliation(s)
- Leya Hage
- Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon.
| | - Roland Kmeid
- Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon; Cranio-Facial Research Laboratory, Saint-Joseph University of Beirut, Beirut, Lebanon
| | - Elie Amm
- Department of Orthodontics and Dentofacial Orthopedics, Henry Goldman School of Dental Medicine, Boston University, Boston, Mass
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Jang W, Choi YJ, Cha JY, Kang YG, Kim E, Kim KH. Three-dimensional evaluation of dentopalatal changes after rapid maxillary expansion in growing children. Am J Orthod Dentofacial Orthop 2024; 165:103-113. [PMID: 37768260 DOI: 10.1016/j.ajodo.2023.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 07/01/2023] [Accepted: 07/01/2023] [Indexed: 09/29/2023]
Abstract
INTRODUCTION In growing children with transverse malocclusion problems, various types of rapid maxillary expanders (RMEs) have been effectively used in skeletal and dental expansions. We evaluated 3-dimensional dentopalatal changes in growing children who underwent maxillary expansion using RMEs and bonded RMEs. METHODS We investigated dentopalatal changes in 20 patients treated with bonded RMEs, 19 with RMEs, and 38 control patients. Dental plaster models before and after expansion were scanned 3-dimensionally and superimposed to evaluate transverse expansion, expansion ratio, angular expansion, and palatal expansion height ratio. RESULTS Using bonded RMEs, similar anterior and posterior dental expansions were achieved with an efficiency of 69%-76% (expansion ratio), and palatal soft-tissue expansion occurred more apically in the posterior area (palatal expansion height ratio, 1.00) than in the anterior area (palatal expansion height ratio, 0.64). Using RMEs, a larger posterior dental expansion was achieved, with an efficiency of 106%-117% (expansion ratio), than anterior dental expansion (55%-60%), and palatal soft-tissue expansion occurred more apically in the posterior area (palatal expansion height ratio, 0.99) than anterior area (palatal expansion height ratio, 0.23). CONCLUSIONS Dental expansions in the anterior and posterior areas were similar using bonded RMEs, whereas the posterior dental expansions were larger than those of the anterior area using RMEs. The entire palatal soft-tissue slope expanded in the posterior area, whereas the occlusal part expanded in the anterior area using RMEs and bonded RMEs.
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Affiliation(s)
- Woowon Jang
- Yonsei Twins Orthodontic Dental Clinic, Seoul, South Korea
| | - Yoon Jeong Choi
- Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, South Korea
| | - Jung-Yul Cha
- Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, South Korea
| | - Yoon Goo Kang
- Department of Orthodontics, Kyung Hee University, Seoul, South Korea
| | - Euiseong Kim
- Department of Conservative Dentistry and Oral Research Center, College of Dentistry, Yonsei University, Seoul, South Korea
| | - Kyung-Ho Kim
- Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Institute of Craniofacial Deformity, Yonsei University, Seoul, South Korea.
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Ravlyk L, Warunek S, Covell D, Tanberg W, Al-Jewair T. Comparison of GUMMETAL® and stainless steel alloy during canine retraction: A pilot split-mouth randomized controlled trial. Int Orthod 2023; 21:100810. [PMID: 37774499 DOI: 10.1016/j.ortho.2023.100810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 08/17/2023] [Accepted: 08/22/2023] [Indexed: 10/01/2023]
Abstract
OBJECTIVES A TiNb alloy wire (GUMMETAL® [GM], Toyota Central R&D Labs, Inc., Nagakute, Japan) was recently developed with unique properties for orthodontic applications. This pilot split-mouth randomized controlled trial compared maxillary canine retraction during space closure using sliding mechanics on GM vs. stainless steel (SS) archwires. METHODS Subjects who met the inclusion criteria were treated with fixed appliances and maxillary first-premolar extractions between September 2020 and March 2022. After leveling and aligning, maxillary archwires, fabricated by crimping together segments of 0.016×0.022" GM and SS archwires, were placed and canine retraction initiated using nickel-titanium coil springs. Digital models of the maxillary arch were superimposed at 0, 4, 8 and 12 weeks and the amount of canine movement (mm), rate of movement (mm/month), and 3-dimensional changes (rotational, vertical extrusion, tip) were measured and compared statistically. RESULTS Of the 12 subjects recruited, only six completed the study with a median age of 15.8 years (12.0-17.4 years). At 12 weeks, the median canine retraction was 3.41mm (IQR: 2.10, 4.76) with GM versus 3.71mm (IQR: 1.62, 6.45) with SS. The retraction rate was 1.14mm/month (IQR: 0.69, 1.59) with GM, versus 1.24mm/month (IQR: 0.54, 2.15) with SS. The median rotational, vertical and tip changes of the canine were 7.90̊, 0.59mm and 6.15̊ with GM, and 7.25̊, 0.29mm and 2.05̊ with SS. Intergroup differences with all measurements were not statistically significant. CONCLUSION No significant differences were found between GM and SS during maxillary canine retraction. GM demonstrated clinical potential for space closure mechanics, however, future larger studies are needed.
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Affiliation(s)
- Lubomyr Ravlyk
- Department of Orthodontics, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, United States
| | - Stephen Warunek
- Department of Orthodontics, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, United States
| | - David Covell
- Department of Orthodontics, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, United States
| | - William Tanberg
- Department of Orthodontics, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, United States
| | - Thikriat Al-Jewair
- Department of Orthodontics, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, United States.
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Souza RXSD, Souza GASD, Colares JP, Ianni TMDS, Magalhães CSD, Guerrero-Vargas JA, Montalvany-Antonucci CC, Macari S. A new way of analyzing tooth movement using universal coordinate system geometry single point superposition in a 3D model. Dental Press J Orthod 2023; 28:e232333. [PMID: 37820226 PMCID: PMC10564451 DOI: 10.1590/2177-6709.28.4.e232333.oar] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 05/24/2023] [Indexed: 10/13/2023] Open
Abstract
INTRODUCTION Superposing 3D models is an imminent need. However, current methods rely on marking multiple points on the maxilla and mandible, which could increase point marking and overlapping errors. OBJECTIVE This study aimed at developing a method for superimposing 3D models of the maxillary and mandibular arches with Autodesk Inventor® engineering software, using a single universal coordinate system (UCS) point superposition. METHODS A total of 104 STL (stereolithography) models of the maxillary and mandibular arches exported from My iTero® platform were retrospectively selected, in which T0 and T1 were the initial and refinement periods, respectively (n=26 per group). The X, Y, and Z coordinates associated with a single point in each arch were inserted into the models with SlicerCMF® software for model orientation. The arch models with UCS registration were transferred to Autodesk Inventor® for superimposition and to measure tooth movements performed during Invisalign® treatment. Arch expansion, intrusion and rotation were analyzed by two examiners. The statistics were performed using intraclass correlation coefficients (ICC), Dahlberg's formula, and t-test (p<0.05). RESULTS A reliable method of superimposing 3D digital models using a single UCS point in the maxilla and mandible was developed. ICC showed excellent intra- and inter-examiner correlation (ICC>0.90). A systematic error was not found concerning linear and angular measurements (<1mm and <1.5°, respectively). Digital dental movements could be analyzed, including arch expansion, dental intrusion, and tooth rotation. CONCLUSIONS The developed method was proven reliable and reproducible for superimposing 3D models of the maxillary and mandibular arches by using UCS system.
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Affiliation(s)
| | | | - João Pacheco Colares
- Federal University of Minas Gerais, Faculty of Dentistry, Department of Restorative Dentistry (Belo Horizonte/MG, Brazil)
| | - Tânia Mara de Souza Ianni
- Federal University of Minas Gerais, Faculty of Dentistry, Department of Restorative Dentistry (Belo Horizonte/MG, Brazil)
| | - Cláudia Silami de Magalhães
- Federal University of Minas Gerais, Faculty of Dentistry, Department of Restorative Dentistry (Belo Horizonte/MG, Brazil)
| | - José Alejandro Guerrero-Vargas
- Federal University of Minas Gerais, Faculty of Dentistry, Department of Restorative Dentistry (Belo Horizonte/MG, Brazil)
- Universidad ECCI, Faculty of Engineering, Department of Mechanical Engineering (Bogotá, Colombia)
| | | | - Soraia Macari
- Federal University of Minas Gerais, Faculty of Dentistry, Department of Restorative Dentistry (Belo Horizonte/MG, Brazil)
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Farronato M, Begnoni G, Boodt LD, Thevissen P, Willems G, Cadenas de Llano-Pérula M. Are palatal rugae reliable markers for 3D superimposition and forensic human identification after palatal expansion? A systematic review. Forensic Sci Int 2023; 351:111814. [PMID: 37722313 DOI: 10.1016/j.forsciint.2023.111814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 08/29/2023] [Indexed: 09/20/2023]
Abstract
OBJECTIVES Palatal rugae are periodic structures situated in the palatal mucosa, often used as landmarks for human identification and superimposition of digital dental models. This review aims to collect the current evidence regarding whether orthodontic palatal expansion could affect the stability of the palatal rugae and to give preliminary guidelines. MATERIALS AND METHODS A systematic review of the literature was performed in the scientific databases Pubmed; Embase; WoS; and Cochrane. Grey Literature was also sought (clinicaltrial.gov; ICTRP; AHRQ; INAHTA). The search protocol, was registered in PROSPERO (N*208722). Data extraction comprised: year of publication, journal, sample size, characteristics of the experimental and control group, type of expander, expansion protocol, rugae classification, measurement method on casts, time between casts, method error, rugae change, morphology change and overall outcome. Risk of bias of the included articles was evaluated with the Newcastle-Ottawa Scale. RESULTS A total of 12394 manuscripts were retrieved after duplicate removal. From these, nine articles were finally included for data extraction. three studies scored as low risk of bias, two as medium and four as high. CONCLUSIONS The morphology of the palatal rugae can be modified by palatal expansion techniques, especially by rapid maxillary expansion. The first rugae is the most stable along with the points close to the palatal midline, which should be used as a reference both for manual or semi-automatic superimpositions. Human identification and serial superimpositions based on palatal rugae should not be carried immediately post expansion and be taken in consideration with caution in patients who underwent prior palatal expansion.
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Affiliation(s)
- Marco Farronato
- Department of Biomedical, Surgical and Dental Sciences, School of Dentistry, University of Milan, Fondazione IRCCS Cà Granda, Milan 20100, Italy.
| | - Giacomo Begnoni
- Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium
| | - Laura De Boodt
- Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium
| | - Patrick Thevissen
- Department of Imaging and Pathology, Forensic Odontology, KU Leuven, Leuven, Belgium
| | - Guy Willems
- Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium
| | - Maria Cadenas de Llano-Pérula
- Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium
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Adel SM, Vaid NR, El-Harouni N, Kassem H, Park JH, Zaher AR. Quantifying maxillary anterior tooth movement in digital orthodontics: Does the choice of the superimposition software matter? J World Fed Orthod 2023; 12:187-196. [PMID: 37625927 DOI: 10.1016/j.ejwf.2023.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/07/2023] [Accepted: 07/22/2023] [Indexed: 08/27/2023]
Abstract
BACKGROUND To compare the agreement between predetermined angular and linear tooth movement measurements processed with three digital model registration software packages. METHODS Twenty maxillary intraoral pretreatment scans of patients undergoing clear aligner therapy were randomly selected. Digital setups were generated using OrthoAnalyzer Clear Aligner Studio software to serve as the reference standard. Both pretreatment scans and setups were converted to STL files and exported to Geomagic, OrthoAnalyzer-Model Set Compare, and Compare model registration software packages. The amount of tooth movement of the maxillary incisors and canines was calculated in six degrees of freedom. RESULTS Statistical significance of the obtained results was expressed at P < 0.01 to account for multiple comparisons. The maxillary central incisors showed the highest agreement for torque and rotation as measured by all software programs. Lateral incisors showed the least agreement in linear movements as measured by Geomagic and Compare, and for tip as measured by Geomagic and OrthoAnalyzer. Maxillary canines had the highest agreement for all linear movements as measured by Geomagic and Compare, and tip as measured by Geomagic and OrthoAnalyzer. Geomagic showed excellent agreement for all measurements except for torque, whereas Compare showed excellent agreement only for rotation and linear measurements. OrthoAnalyzer showed moderate agreement for all measurements except for rotation, which showed good agreement. CONCLUSIONS Maxillary central incisor measurements showed higher agreement compared with measurements of the maxillary lateral incisors and canines. Although none of the software showed poor agreement, Geomagic seemed to have the highest accuracy.
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Affiliation(s)
- Samar M Adel
- Lecturer, Department of Orthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
| | - Nikhilesh R Vaid
- Adjunct Professor, Department of Orthodontics, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Chennai, India; Consultant Orthodontist and Director, Only Orthodontics, Mumbai, India
| | - Nadia El-Harouni
- Professor, Department of Orthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Hassan Kassem
- Assistant Professor, Department of Orthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Jae Hyun Park
- Professor and Chair, Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, Ariz and International Scholar, Graduate School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Abbas R Zaher
- Professor, Department of Orthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
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Oueiss A, Camia J, Masucci C, Charavet C, Joseph C. Exploring the mylohyoid area as a reference for three-dimensional digital mandibular superimposition. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2022; 123:672-676. [PMID: 35907610 DOI: 10.1016/j.jormas.2022.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 07/19/2022] [Accepted: 07/22/2022] [Indexed: 11/15/2022]
Abstract
INTRODUCTION the quantification of tooth movements should be obtained at different specific times and compared at different stages for every orthodontic treatment. These movements are generally measured on teleradiographs or casts. The use of Cone Beam Computed tomography (CBCT) for maxillary superimposition is clearly established in the literature, but not well defined for mandibular superimposition. This study aims to explore and evaluate the accuracy of the mylo-hyoid area as a reference for mandibular Digital Dental Cast (DDC) three-dimensional (3D) superimposition. MATERIALS AND METHODS the study compared mandibular 3D overlays with profile teleradiographs in 30 patients followed at Nice Saint Roch University Hospital. The molar and incisor coordinates on the 3D superimposition based on the mylo-hyoid area were compared to the ones on the 2D lateral cephalogram. Differences between the two methods of superimposition were assessed using paired t-tests. RESULTS No statistically significant difference was observed between the lateral cephalogram-based and mandibular DDC superimposition methods in 3D sagittal and vertical displacements of the lower first molars and central incisors. CONCLUSION The study showed the mylo-hyoid area to be an accurate superimposition landmark for the 3D evaluation of mandibular orthodontic tooth displacement. This method is also applicable for patients with conventional orthodontic treatment records. Other studies should be conducted on larger populations, subgroups (malocclusions, therapeutics) and on the use of an intra-oral camera.
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Affiliation(s)
- A Oueiss
- Nice University Hospital, France; Côte d'Azur University, Nice, France; Department of orthodontics and dentofacial orthopedics, faculty of dentistry, Nice, France.
| | - J Camia
- Nice University Hospital, France; Côte d'Azur University, Nice, France; Department of orthodontics and dentofacial orthopedics, faculty of dentistry, Nice, France
| | - C Masucci
- Nice University Hospital, France; Côte d'Azur University, Nice, France; Department of orthodontics and dentofacial orthopedics, faculty of dentistry, Nice, France
| | - C Charavet
- Nice University Hospital, France; Côte d'Azur University, Nice, France; Department of orthodontics and dentofacial orthopedics, faculty of dentistry, Nice, France; UPR 7354 MICORALIS laboratory, Nice, France
| | - C Joseph
- Nice University Hospital, France; Côte d'Azur University, Nice, France; Department of orthodontics and dentofacial orthopedics, faculty of dentistry, Nice, France; Department of pediatric dentistry, faculty of dentistry, Nice, France; UPR 7354 MICORALIS laboratory, Nice, France
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Three-dimensional dentoalveolar changes in open bite treatment in mixed dentition, spurs/posterior build-ups versus spurs alone: 1-year follow-up randomized clinical trial. Sci Rep 2022; 12:12378. [PMID: 35858941 PMCID: PMC9300740 DOI: 10.1038/s41598-022-15988-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Accepted: 07/04/2022] [Indexed: 11/12/2022] Open
Abstract
This randomized clinical trial aimed to compare the three-dimensional dentoalveolar maxillary changes after anterior open bite treatment with bonded spurs and build-ups versus bonded spurs alone. Patients from 7 to 11 years of age with anterior open bite were randomly allocated into two groups. Bonded spurs and posterior build-ups were used in the experimental group and only bonded spurs were used in the comparison group. The randomization sequence was generated at www.randomization.com. Opaque, sealed and sequentially numbered envelopes were part of the allocation concealment. Digital dental models were acquired before (T1) and after 12 months of treatment (T2) and de-identified for analysis purposes. Three-dimensional changes of maxillary permanent incisors and first molars were evaluated by means of T1 and T2 dental model superimposition. Landmark-based registration on the posterior teeth and registration on the palate using regions of interest were performed. T or Mann–Whitney U tests were used for intergroup comparisons (P < 0.05). Mean difference (MD) and 95% confidence interval (CI) were calculated. Twenty-four children (17 girls and 7 boys) were included in the experimental group (mean age 8.22 ± 1.06 years) and 25 children (14 girls and 11 boys) were included in the comparison group (mean age 8.30 ± 0.99 years). After 12 months of treatment, inferior displacements of maxillary incisors were similar in the experimental (1.55–2.92 mm) and comparison (1.40–2.65 mm) groups. Inferior displacement of the maxillary molars was also similar in both groups (MD: − 0.13 mm; 95% CI − 0.38, 0.12). The experimental and comparison groups showed medial and lateral displacements of the permanent first molars, respectively (MD, − 0.31 mm; 95% CI − 0.51, − 0.11). Lingual inclination of the permanent first molars were observed in the experimental group and buccal inclination in the comparison group (MD, − 2.16°; 95% CI − 3.72, − 0.60). Similar three-dimensional displacements of maxillary central and lateral incisors, and inferior displacements of maxillary permanent first molars were observed in both groups. Bonded spurs associated with posterior build-ups demonstrated some medial displacement and lingual inclination of the maxillary permanent first molars while opposite changes were noticed in the comparison group. Trial registration: Clinicaltrials.gov; NCT03702881, date of registration: October 11, 2018.
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Adel SM, Vaid NR, El-Harouni N, Kassem H, Zaher AR. Digital model superimpositions: are different software algorithms equally accurate in quantifying linear tooth movements? BMC Oral Health 2022; 22:103. [PMID: 35361187 PMCID: PMC8973572 DOI: 10.1186/s12903-022-02129-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 03/14/2022] [Indexed: 11/16/2022] Open
Abstract
Background To evaluate the accuracy of three different 3D digital model registration software packages for linear tooth movement measurements, with reference to a 3D digital virtual setup (DS). Methods Twenty maxillary and mandibular pre-treatment scans of patients undergoing clear aligner therapy were used. Digital Setups were generated from pre-treatment scans using OrthoAnalyzer software. Both the pretreatment digital scans (T1) and Digital Setups (T2) were converted to STL files to be imported to the three studied software packages: Geomagic, OrthoAnalyzer and Compare. Linear changes in tooth positions were calculated for all the registered pairs. Results The change in tooth position was compared between the calculated tooth movement using each of the registration software packages versus the actual generated tooth movement from the Digital Setups. Continuous data was expressed as mean and standard deviation. Intraclass Correlation Coefficients for agreements between Digital Simulation and each software was used. Intra and Inter-examiner reliabilities were also assessed using Intraclass Correlation Coefficients. Significance of the obtained results was expressed at p ≤ 0.01. Geomagic software showed agreements > 0.90 for maxillary linear tooth movements and between 0.75 and 0.90 for mandibular measurements. OrthoAnalyzer software showed agreements between 0.50 and < 0.75 for maxillary and mandibular measurements. Compare software showed agreements > 0.90 for maxillary and mandibular linear tooth movements, indicating the best consistency. Conclusions Compare and Geomagic software packages consistently showed maximum accuracy in measuring the amount of tooth movement in the maxillary arch compared to the reference standard. Compare software showed the highest agreements in the mandibular arch. None of the three studied software packages showed poor agreement with the Digital Setup across all tooth movement measurements. Buccolingual tooth movements showed the highest agreements amongst linear measurements.
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Affiliation(s)
- Samar M Adel
- Department of Orthodontics, Faculty of Dentistry, Alexandria University, Champollion Street, El Azarita, Alexandria, Egypt.
| | - Nikhilesh R Vaid
- Department of Orthodontics, Saveetha Dental College, Saveetha Insitute of Medical and Technical Sciences, Chennai, India
| | - Nadia El-Harouni
- Department of Orthodontics, Faculty of Dentistry, Alexandria University, Champollion Street, El Azarita, Alexandria, Egypt
| | - Hassan Kassem
- Department of Orthodontics, Faculty of Dentistry, Alexandria University, Champollion Street, El Azarita, Alexandria, Egypt
| | - Abbas R Zaher
- Department of Orthodontics, Faculty of Dentistry, Alexandria University, Champollion Street, El Azarita, Alexandria, Egypt
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Adel SM, Vaid NR, El-Harouni N, Kassem H, Zaher AR. TIP, TORQUE & ROTATIONS: How accurately do digital superimposition software packages quantify tooth movement? Prog Orthod 2022; 23:8. [PMID: 35284950 PMCID: PMC8918442 DOI: 10.1186/s40510-022-00402-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 02/17/2022] [Indexed: 12/03/2022] Open
Abstract
Background To investigate the accuracy of three different 3D digital model registration software for tip, torque and rotation measurements, with reference to a 3D digital virtual setup. Twenty maxillary and mandibular pre-treatment scans of patients undergoing clear aligner therapy were used. Digital setups were generated from pre-treatment scans using a tooth movement software. Both the pretreatment digital scans (T1) and digital setups (T2) were converted to STL files to be exported to the 3 studied software that employed: (1) Semiautomatic best fit registration (S-BF), (2) Interactive surface-based registration (I-SB), and (3) Automatic best fit registration (A-BF) respectively. Changes in tip, torque and rotation were calculated for all the registered pairs. Results The change in tooth position was compared between the calculated tooth movement using each of the registration software packages versus the actual generated tooth movement from the digital setups. Continuous data was expressed as mean and standard deviation. Intra Class Correlation Coefficient for agreement between digital simulation and each software was used. Intra and Inter-examiner reliabilities were also assessed using Intra Class Correlation Coefficient. Significance of the obtained results was expressed at p ≤ 0.01. Semiautomatic best fit registration software showed excellent agreement (> 0.90) for all tooth movements, except for good agreement for torque (0.808). Interactive surface-based registration software showed moderate agreement for all measurements (0.50 and < 0.75), except for good agreement for rotation (0.783). Automatic best fit registration software demonstrated excellent agreement (> 0.90) for rotation, good agreement for tip (0.890) and moderate agreement for torque (0.740). Conclusions Overall, semiautomatic best fit registration software consistently showed excellent agreement in superimpositions compared to other software types. Automatic best fit registration software consistently demonstrated better agreement for mandibular superimpositions, compared to others. Accuracy of digital model superimpositions for tooth movements studied in superimposition studies, can be attributed to the algorithm employed for quantification.
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Zhao J, Du S, Liu Y, Saif BS, Hou Y, Guo YC. Evaluation of the stability of the palatal rugae using the three-dimensional superimposition technique following orthodontic treatment. J Dent 2022; 119:104055. [PMID: 35121138 DOI: 10.1016/j.jdent.2022.104055] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/26/2022] [Accepted: 01/31/2022] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES To determine the uniqueness and stability of the palatal rugae after orthodontic treatment. METHODS Cast models of untreated subjects (n=50) were obtained twice at intervals of 8-30 months. Cast models of patients who received non-extraction (n=50) and extraction (n=50) orthodontic treatment were obtained before and after treatment at intervals of 11-41 months and 14-49 months, respectively. All 300 cast models were scanned digitally. The palatal rugae were manually extracted and transformed into 3D point clouds using reverse engineering software. An iterative closest point (ICP) registration algorithm based on correntropy was applied, and the minimum point-to-point root mean square (RMS) distances were calculated to analyze the deviation of palatal rugae for scans of the same subject (intrasubject deviation [ISD]) and between different subjects (between-subject deviation [BSD]). Differences in ISD between each group and the deviation between ISD and BSD of all 150 subjects were evaluated. RESULTS Significant differences were found in the 150 ISD and 1225 BSD in each group, as well as the 150 ISD and 11175 BSD across all groups. The mean values of ISD in untreated, non-extraction and extraction group were 0.178, 0.229 and 0.333 mm, respectively. When the first ruga was excluded in the extraction group, the mean ISD decreased to 0.241 mm, which was not significantly different from that in the non-extraction group (p=0.314). CONCLUSIONS Orthodontic treatment can influence the palatal rugae, especially in cases of extraction. Furthermore, variation mainly existed in the first ruga in cases of extraction. However, palatal rugae are still unique and may be used as a supplementary tool for individual identification. CLINICAL SIGNIFICANCE This study indicates that palatal rugae might be applied in the evaluation of orthodontic tooth movement and forensic individual identification. The registration algorithm based on correntropy provides a credible, precise, and convenient method for palatal rugae superimposition.
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Affiliation(s)
- Jiamin Zhao
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an 710004, Shaanxi, PR China; Department of Orthodontics, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an 710004, Shaanxi, PR China
| | - Shaoyi Du
- Institute of Artificial intelligence and robotics, College of Artificial Intelligence, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an 710049, Shaanxi, PR China
| | - Yuying Liu
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an 710004, Shaanxi, PR China; Institute of Artificial intelligence and robotics, College of Artificial Intelligence, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an 710049, Shaanxi, PR China
| | - Badr Sultan Saif
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an 710004, Shaanxi, PR China; Department of Orthodontics, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an 710004, Shaanxi, PR China
| | - Yuxia Hou
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an 710004, Shaanxi, PR China; Department of Orthodontics, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an 710004, Shaanxi, PR China
| | - Yu-Cheng Guo
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an 710004, Shaanxi, PR China; Department of Orthodontics, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an 710004, Shaanxi, PR China; Institute of Artificial intelligence and robotics, College of Artificial Intelligence, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an 710049, Shaanxi, PR China.
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Aliaga-Del Castillo A, Vilanova L, Janson G, Arriola-Guillén LE, Garib D, Miranda F, Massaro C, Yatabe M, Cevidanes L, Ruellas AC. Comparison and reproducibility of three methods for maxillary digital dental model registration in open bite patients. Orthod Craniofac Res 2021; 25:269-279. [PMID: 34543518 DOI: 10.1111/ocr.12535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/26/2021] [Accepted: 09/13/2021] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To compare and assess the reproducibility of 3 methods for registration of maxillary digital dental models in patients with anterior open bite. Settings and sample population Digital dental models of 16 children with an anterior open bite in the mixed dentition were obtained before (T1) and after 12 months of treatment with bonded spurs (T2). METHODS Landmarks were placed on all T2 models and 3 registration methods (R1, R2 and R3) were independently performed by 2 observers. R1 was based on 10 landmarks placed on posterior teeth. R2 was based on 5 landmarks on the palate (2 anterior, 2 posterior and 1 central). R3 used regions of interest around the 5 palatal landmarks used in R2. The differences between the registration methods were calculated by comparing the mean differences and standard deviations between the corresponding x, y and z coordinates of 6 corresponding landmarks in the T2 registered models. Repeated measures analysis of variance followed by post-hoc Bonferroni tests were used for comparisons (P < .05). The agreement between methods and the intra and interobserver reproducibility were assessed with Bland-Altman tests and intraclass correlation coefficients (ICC). RESULTS Comparisons of R2 with R3 methods showed greater agreement, mean differences ≤0.50 mm for all landmarks, than comparisons of R1 with R2, and R1 with R3, mean differences >0.50 mm for most of the y and z coordinates (P < .05). The R1 and R3 methods presented excellent intra and interobserver reproducibility and R2 method had moderate interobserver reproducibility. CONCLUSIONS Longitudinal assessments of open bite treatment using digital dental models could consider the posterior teeth and/or the palate as references. The R1 and R3 methods showed adequate reproducibility and yield different quantitative results. The choice will depend on the posterior teeth changes and dental models' characteristics.
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Affiliation(s)
| | - Lorena Vilanova
- Department of Orthodontics. Bauru Dental School, University of São Paulo, Brazil
| | - Guilherme Janson
- Department of Orthodontics. Bauru Dental School, University of São Paulo, Brazil
| | - Luis Ernesto Arriola-Guillén
- Division of Orthodontics and Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú
| | - Daniela Garib
- Department of Orthodontics. Bauru Dental School, University of São Paulo, Brazil.,Department of Orthodontics, Hospital of Rehabilitation of Craniofacial Anomalies, University of São Paulo, Brazil
| | - Felicia Miranda
- Department of Orthodontics. Bauru Dental School, University of São Paulo, Brazil
| | - Camila Massaro
- Department of Orthodontics. Bauru Dental School, University of São Paulo, Brazil
| | - Marilia Yatabe
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Lucia Cevidanes
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Antonio Carlos Ruellas
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.,Department of Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Bhai K, Judge R, Abduo J, Palamara J. Measuring tooth movement with treatment using the Dahl principle: An observational study. J Prosthet Dent 2021; 129:554-560. [PMID: 34399993 DOI: 10.1016/j.prosdent.2021.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 07/13/2021] [Accepted: 07/13/2021] [Indexed: 11/25/2022]
Abstract
STATEMENT OF PROBLEM Research on the quantification of 3-dimensional tooth movements in patients undergoing treatment using the Dahl principle is lacking. PURPOSE The purpose of this observational clinical study was to measure the magnitude, direction, duration, and rate of tooth movement occurring in patients to reestablish tooth contact and create restorative space. MATERIAL AND METHODS A total of 104 paired preoperative and postoperative physical and virtual casts from 26 patients were obtained. Commencement and completion dates were recorded to calculate movement duration to reestablish occlusion. Dental casts were digitized, and the 3-dimensional digital casts obtained were superimposed via a surface matching and analysis software program by using the global registration function. Color maps were used to visualize direction, and the annotation feature quantified magnitude of tooth movement in millimeters when specific reference points were selected. Teeth within the arch were categorized as per their location to evaluate their impact on occlusal reestablishment. The average rate of movement was determined by time taken for extrusive and intrusive movements over the treatment duration. Post hoc Tukey tests were applied if a significant difference was present in the magnitude of movement between different tooth categories. RESULTS All participants showed evidence of tooth movement during treatment. Duration of occlusal reestablishment ranged from 3.9 to 28.2 months, with more posterior tooth extrusive movements (56.9%) than anterior tooth intrusive (43.1%) movements occurring. A comparison of magnitude of extrusive or intrusive movement between categories (molar-anterior, premolar-anterior, and premolar-molar) showed that premolar and molar extrusive movements and anterior intrusive movements were significantly different (P<.001). The amount of buccal and lingual movement for molars and premolars was similar. Anterior teeth demonstrated more buccal than lingual movements. All teeth showed more mesial than distal movements. The extrusive and intrusive movement rate was 0.13 and 0.11 mm/mo, respectively. CONCLUSIONS Tooth movement occurred in patients regardless of age and sex. The results of this study indicated that tooth movements have a 3-dimensional nature. Occlusal reestablishment mainly occurred via a combination of extrusive and intrusive movements. The study further highlighted the advantages of digital technology such as surface scanners and 3-dimensional software programs that can be used to quantify change in patients undergoing treatment.
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Affiliation(s)
- Kritesh Bhai
- Past Prosthodontic Postgraduate student, Restorative Dentistry Department, Melbourne Dental School, The University of Melbourne, Melbourne, Australia.
| | - Roy Judge
- Associate Professor, Head of Prosthodontics, Restorative Dentistry Department, Melbourne Dental School, The University of Melbourne, Melbourne, Australia
| | - Jaafar Abduo
- Associate Professor, Convener of Postgraduate Diploma in Clinical Dentistry, Restorative Dentistry Department, Melbourne Dental School, The University of Melbourne, Melbourne, Australia
| | - Joseph Palamara
- Associate Professor, Coordinator of Materials Science, Restorative Dentistry Department, Melbourne Dental School, The University of Melbourne, Melbourne, Australia
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Winkler J, Gkantidis N. Intraoral scanners for capturing the palate and its relation to the dentition. Sci Rep 2021; 11:15489. [PMID: 34326472 PMCID: PMC8322384 DOI: 10.1038/s41598-021-95103-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 07/12/2021] [Indexed: 12/18/2022] Open
Abstract
Proper superimposition of intraoral scan generated 3D models enables detailed assessment of soft and hard tissue surface changes. This requires accurate 3D models and stable structures as superimposition references. In the maxilla, different reference areas have been proposed, mostly located at the palatal region. In this in vivo study we evaluated the precision of two intraoral scanners (TRIOS 3, 3Shape and CS 3600, Carestream) at the maxilla, focusing on the palate itself and also on its spatial relation to the dentition, following palatal superimposition. Precision was tested through the superimposition of repeated scans on the palate and the dental arch. Overall, the median precision of both scanners was high (< 0.1 mm). Scanner precision was comparable when the palatal area was tested individually. However, TRIOS 3 showed higher precision regarding the assessment of the dental arch, following superimposition of repeated models on the palate (median difference: approximately 40 μm). In few cases, local areas of higher imprecision were present for both scanners, exceeding 0.3 mm. Thus, scanner precision seems to be high in small, but slightly reduced considering larger areas, with differences between scanners. However, the effect on individual tooth position relative to the palate was for both scanners limited.
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Affiliation(s)
- Jonas Winkler
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland
| | - Nikolaos Gkantidis
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland.
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Stucki S, Gkantidis N. Assessment of techniques used for superimposition of maxillary and mandibular 3D surface models to evaluate tooth movement: a systematic review. Eur J Orthod 2021; 42:559-570. [PMID: 31742598 DOI: 10.1093/ejo/cjz075] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Superimposition of three-dimensional (3D) digital models offers great opportunities to assess tooth movement during time. In the literature, several superimposition techniques are described. OBJECTIVES To summarize and critically assess the available evidence from studies on serial digital 3D dental model superimposition. SEARCH METHODS MEDLINE via Ovid and PubMed, EMBASE via Ovid, Cochrane Register of Diagnostic Test Accuracy Studies, and Google Scholar were searched with no time limit (last update: December 2018). Hand and unpublished literature searches were also performed. SELECTION CRITERIA Studies of any design that had a sample size ≥5 and tested superimposition of serial 3D digital dental models to assess tooth movement were included. DATA COLLECTION AND ANALYSIS Study selection, data extraction, and risk of bias assessment were performed independently by the authors. RESULTS Twelve studies met the eligibility criteria. The total risk of bias (QUADAS-2 tool) of 10 studies was high, whereas only 2 studies had unclear bias. Ten studies had high and two studies low overall applicability concerns. From these, one study tested the mandibular alveolar bone area, three studies the rugae area, nine studies a larger palatal area, and two studies the incisive papilla area. The high heterogeneity in samples, outcomes, and methods did not allow for synthesis of a considerable amount of studies in any case. LIMITATIONS The high heterogeneity among studies and the limited evidence did not allow for solid conclusions. CONCLUSIONS AND IMPLICATIONS The following areas of the maxilla could provide reliable outcomes: (1) the medial two-thirds of the third rugae and the area 5 mm dorsal to them and (2) an area including all rugae, with the lateral margins located at least 5 mm from the gingival margins and a distal margin that does not extend beyond the first molars. No recommendation is possible for other regions of the mouth. There is an urgent need for further research in the field. REGISTRATION PROSPERO (CRD42019124365).
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Affiliation(s)
- Sven Stucki
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Switzerland
| | - Nikolaos Gkantidis
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Switzerland
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Insawak R, Lin CH, Chen YA, Ko EWC. Comparison of 3-dimensional postoperative dental movement in Class III surgical correction with and without presurgical orthodontic treatment. Biomed J 2020; 44:S282-S295. [PMID: 35292268 PMCID: PMC9068748 DOI: 10.1016/j.bj.2020.12.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 02/11/2020] [Accepted: 12/21/2020] [Indexed: 11/16/2022] Open
Abstract
Background Surgery-first approach (SFA) is an emerging concept that surgically reposition the jaw bones without presurgical orthodontic treatment phase. The study investigated 3D dental movement in the postoperative orthodontic phase with orthodontic-first (OF) and SFA in orthognathic surgery (OGS). Methods This study included consecutive 40 patients (20, SF group; 20, OF group) skeletal Class III who underwent 2-jaw OGS correction. The data of cone-beam computed tomography were acquired at 3 stages with the scan of dental models to replace the dentition of the craniofacial images; at before OGS (T0), 1 week after OGS (T1) and at the completion of treatment (T2). The skeletal changes were obtained by overall superimposition. The post-operative dental movement was measured by 3D regional superimposition between T1 and T2. Results There were no significant difference in the postsurgical orthodontic movement in both groups except significant upper and lower molars extrusion by 2 mm in the SF group. Both groups exhibited no significant difference in mandibular stability in sagittal and vertical directions. The amount of extrusion in the molars was correlated with a postoperative sagittal mandibular forward movement. The total treatment duration was significantly shorter 230 days in the SF group. Conclusion The completion of the orthodontic treatment after OGS in the SFA was mainly accomplished through molar extrusive movement in both arches. The surgical setup of dental occlusion with 4 mm posterior open bite could be corrected during the postsurgical orthodontics in SFA through molar extrusion. The dental occlusion outcome was no different between OF and SFA.
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Affiliation(s)
- Rutapakon Insawak
- Graduate Institute of Craniofacial and Oral Science, Chang Gung University, Taoyuan, Taiwan
| | - Cheng-Hui Lin
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; Craniofacial Research Center, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Ying-An Chen
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan; Craniofacial Research Center, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Ellen Wen-Ching Ko
- Graduate Institute of Craniofacial and Oral Science, Chang Gung University, Taoyuan, Taiwan; Department of Craniofacial Orthodontics, Chang Gung Memorial Hospital at Taipei, Taipei, Taiwan; Craniofacial Research Center, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan.
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Gandedkar NH, Vaid NR, Darendeliler MA, Premjani P, Ferguson DJ. The last decade in orthodontics: A scoping review of the hits, misses and the near misses! Semin Orthod 2019. [DOI: 10.1053/j.sodo.2019.10.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Teng F, Du FY, Chen HZ, Jiang RP, Xu TM. Three-dimensional analysis of the physiologic drift of adjacent teeth following maxillary first premolar extractions. Sci Rep 2019; 9:14549. [PMID: 31601925 PMCID: PMC6787091 DOI: 10.1038/s41598-019-51057-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 09/13/2019] [Indexed: 12/12/2022] Open
Abstract
We assessed the three-dimensional (3D) pattern of the physiologic drift of the remaining adjacent teeth after premolar extraction due to orthodontic reasons and the associated factors. Data were collected from 45 patients aged 17.04 ± 5.14 years who were scheduled to receive a fixed appliance after maxillary premolar extraction. Seventy-five drift models were obtained and digitalized via 3D scanning. The average physiologic drift duration was 81.66 ± 70.03 days. Angular and linear changes in the first molars, second premolars, and canines were measured using the 3D method. All the examined teeth had tipped and moved towards the extraction space, leading to space decreases. Posterior teeth primarily exhibited significant mesial tipping and displacement, without rotation or vertical changes. All canine variables changed, including distal inward rotation and extrusion. The physiologic drift tended to slow over time. Age had a limited negative effect on the mesial drift of posterior teeth, whereas crowding had a limited positive effect on canine drift. Thus, the mesial drift of molars after premolar extraction may lead to molar anchorage loss, particularly among younger patients. The pattern of the physiologic drift of maxillary canines can help relieve crowding and facilitate labially ectopic canine alignment, whereas canine drift is accelerated by more severe crowding.
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Affiliation(s)
- Fei Teng
- Department of Orthodontics, Peking University School and Hospital of Stomatology, 22# Zhongguancun South Avenue, Haidian District, Beijing, P.R. China
| | - Fei-Yu Du
- Department of Orthodontics, Peking University School and Hospital of Stomatology, 22# Zhongguancun South Avenue, Haidian District, Beijing, P.R. China
| | - Hui-Zhong Chen
- Department of Orthodontics, Peking University School and Hospital of Stomatology, 22# Zhongguancun South Avenue, Haidian District, Beijing, P.R. China
| | - Ruo-Ping Jiang
- Department of Orthodontics, Peking University School and Hospital of Stomatology, 22# Zhongguancun South Avenue, Haidian District, Beijing, P.R. China
| | - Tian-Min Xu
- Department of Orthodontics, Peking University School and Hospital of Stomatology, 22# Zhongguancun South Avenue, Haidian District, Beijing, P.R. China.
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Anacleto MA, Souki BQ. Superimposition of 3D maxillary digital models using open-source software. Dental Press J Orthod 2019; 24:81-91. [PMID: 31116291 PMCID: PMC6526761 DOI: 10.1590/2177-6709.24.2.081-091.bbo] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 01/31/2019] [Indexed: 11/22/2022] Open
Abstract
Historically, whether for research purposes or clinical monitoring, orthodontic evaluation of dental movements has been done using plaster study models and two dimensional (2D) radiographs. However, new frontiers for the diagnosis, planning and outcome assessment of orthodontic treatments have arisen, due to the revolutionary digital tools which enable a three dimensional (3D) computerized analysis of dental movements by means of digital models. However, the software for 3D analysis are often costly, resulting in limited access to orthodontists. The present study aims to describe, through a clinical case presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics, a method for the superimposition of maxillary digital models using an open-source software to evaluate dental movements.
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Affiliation(s)
- Murilo Augusto Anacleto
- Pontifícia Universidade Católica de Minas Gerais, Programa de Pós-graduação em Odontologia (Belo Horizonte/MG, Brazil)
| | - Bernardo Quiroga Souki
- Pontifícia Universidade Católica de Minas Gerais, Programa de Pós-graduação em Odontologia (Belo Horizonte/MG, Brazil)
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Talaat S, Ghoneima A, Kaboudan A, Talaat W, Ragy N, Bourauel C. Three‐dimensional evaluation of the holographic projection in digital dental model superimposition using HoloLens device. Orthod Craniofac Res 2019; 22 Suppl 1:62-68. [DOI: 10.1111/ocr.12286] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 12/14/2018] [Indexed: 12/01/2022]
Affiliation(s)
- Sameh Talaat
- Department of OrthodonticsCollege of DentistryFuture University in Egypt Cairo Egypt
- Department of Oral TechnologySchool of DentistryUniversity of Bonn Bonn Germany
| | - Ahmed Ghoneima
- Department of Orthodontics and Oral Facial GeneticsIndiana University School Dentistry Indianapolis Indiana
- Department of OrthodonticsFaculty of Dental MedicineAl‐Azhar University Cairo Egypt
- Department of OrthodonticsHamdan Bin Mohammed College of Dental MedicineMohammed Bin Rashid University of Medicine and Health Sciences Dubai United Arab Emirates
| | - Ahmed Kaboudan
- Department of Computer ScienceElShorouk Academy New Cairo Egypt
- Department of Research and DevelopmentDigiBrain4 Chicago Illinois
| | - Wael Talaat
- Department of Oral and Craniofacial Health SciencesCollege of Dental MedicineUniversity of Sharjah Sharjah United Arab Emirates
- Department of Oral and Maxillofacial SurgeryFaculty of DentistrySuez Canal University Ismailia Egypt
| | - Nivin Ragy
- Department of Oral Medicine and RadiologyCollege of DentistryFuture University in Egypt Cairo Egypt
| | - Christoph Bourauel
- Department of Oral TechnologySchool of DentistryUniversity of Bonn Bonn Germany
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26
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Garib D, Miranda F, Yatabe MS, Lauris JRP, Massaro C, McNamara JA, Kim-Berman H, Janson G, Behrents RG, Cevidanes LHS, de Oliveira Ruellas AC. Superimposition of maxillary digital models using the palatal rugae: Does ageing affect the reliability? Orthod Craniofac Res 2019; 22:183-193. [PMID: 30844126 DOI: 10.1111/ocr.12309] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/27/2019] [Accepted: 02/28/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the reliability of 3-dimensional maxillary dental changes using two methods of digital model superimposition. SETTING AND SAMPLE POPULATION The Department of Orthodontics of Bauru Dental School, University of São Paulo and University of Michigan Craniofacial Growth Center. Fifteen subjects with normal occlusion. MATERIAL & METHODS The sample was composed of digital study models of 15 normal occlusion subjects taken at 13 (T1), 18 (T2) and 60 years of age (T3). Using the software SlicerCMF 3.1, superimposition (registration) was conducted using 9 landmarks placed on the incisive papilla, second and third palatal rugae and 10 mm distal to the third palatal rugae. Two registration methods were compared: landmarks (LA) and regions of interest (ROI). Three-dimensional changes of landmarks on the buccal cusp tip of posterior teeth bilaterally and the incisal edge of the right central incisor were measured by three examiners. Intraclass correlation coefficients and Bland-Altman method evaluated intra- and inter-examiner agreements. RESULTS Good or excellent intra-examiner agreement was found for T1-T2 and T2-T3 measurements using both registration methods. Inter-examiner agreements were good to excellent for T1-T2 measurements and poor to fair for most T2-T3 measurements. Mean T1-T2 differences were less than 0.5 mm for most measurements. CONCLUSION Maxillary digital dental models of patients with normal occlusion superimposed on palatal rugae showed an adequate reliability for a 5-year interval comparison using landmarks or regions of interest. Lower than acceptable reproducibility using both superimposition methods was found for a 40-year interval comparison.
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Affiliation(s)
- Daniela Garib
- Department of Orthodontics, Bauru Dental School and Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, Brazil
| | - Felicia Miranda
- Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil
| | - Marilia S Yatabe
- Department of Orthodontics and Pediatric Dentistry, School of Dental Medicine, University of Michigan, Ann Arbor, MI, USA
| | | | - Camila Massaro
- Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil
| | - James A McNamara
- Department of Orthodontics and Pediatric Dentistry, School of Dental Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Hera Kim-Berman
- Department of Orthodontics and Pediatric Dentistry, School of Dental Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Guilherme Janson
- Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil
| | - Rolf G Behrents
- Orthodontic Program at the Center for Advanced Dental Education of Saint Louis University, Saint Louis, MO, USA
| | - Lucia H S Cevidanes
- Department of Orthodontics and Pediatric Dentistry, School of Dental Medicine, University of Michigan, Ann Arbor, MI, USA
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