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Loma Salcedo H, Huasco Huarcaya NE. [Degree of reliability of the assessment of the Bolton analysis in three-dimensional virtual models versus plaster models. a review]. REVISTA CIENTÍFICA ODONTOLÓGICA 2023; 11:e155. [PMID: 38288455 PMCID: PMC10809974 DOI: 10.21142/2523-2754-1102-2023-155] [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] [Received: 04/08/2023] [Accepted: 05/31/2023] [Indexed: 02/01/2024] Open
Abstract
Introduction Bolton analysis is used to determine anomalies with respect to the dental mass, for diagnosis and treatment planning purposes, the possibility of using a digital method was introduced and tested to measure the size of the mesiodistal tooth. In this way, digital dental technology has made digital study models become popular in orthodontics. Objective to evaluate the degree of reliability of the evaluation of the Bolton analysis in three-dimensional virtual models versus plaster models through a review of the literature. Materials and methods A search was carried out in the primary databases of the international scientific literature on health sciences: Medline, through PubMed, SciELO, Lilacs, and Embase. Review articles published between the year 2000 and October 2021 were included. Results The desktop scanner was the best option for digitizing dental models, but this does not detract from CBCT and intraoral laser scanners, which are still an option. Reasonable validity for digitizing 3D models with results within the "clinically acceptable" range was found. Conclusions 3D digital models generated with intraoral and extraoral scanners are reliable and accurate compared to conventional impressions and save time, in most cases statistically significant differences were found, but of little clinical relevance.
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Affiliation(s)
- Humberto Loma Salcedo
- División de Ortodoncia, Universidad Científica del Sur. Lima, Perú. , Universidad Científica del Sur División de Ortodoncia Universidad Científica del Sur Lima Peru
| | - Nelly Erlinda Huasco Huarcaya
- División de Ortodoncia, Universidad Científica del Sur. Lima, Perú. , Universidad Científica del Sur División de Ortodoncia Universidad Científica del Sur Lima Peru
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Shailendran A, Weir T, Freer E, Kerr B. Accuracy and reliability of tooth widths and Bolton ratios measured by ClinCheck Pro. Am J Orthod Dentofacial Orthop 2021; 161:65-73. [PMID: 34417034 DOI: 10.1016/j.ajodo.2020.06.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 05/01/2020] [Accepted: 06/01/2020] [Indexed: 01/25/2023]
Abstract
INTRODUCTION This study aimed to assess the accuracy and reliability of tooth widths and Bolton ratios measured in ClinCheck Pro. METHODS Five sets of typodonts were scanned using an iTero scanner, and the digital models were electronically transmitted to Align Technology for treatment planning. The typodont teeth were then segmented and measured using 3-dimensional optical profilometry (3D OP) and a calibrated digital caliper. Tooth widths estimated by ClinCheck Pro were compared with those measurements obtained using 3D OP and digital calipers. To determine the reliability of ClinCheck Pro measured tooth widths and Bolton ratios, the records of 30 consecutive patients treated with the Invisalign appliance without interproximal reduction were obtained. Values at the initial ClinCheck Pro treatment plan were compared with those from additional aligner scans. Accuracy, the agreement between methods, and reliability were investigated using the Bland Altman method. RESULTS A systematic under measurement was observed in the tooth widths measured by ClinCheck Pro (mean, 0.36 mm) compared with those obtained using 3D OP and digital caliper (individually segmented teeth). Although the overall reliability of ClinCheck Pro measured tooth widths was good (intraclass correlation coefficient, 0.96), the reliability of Bolton ratios was only moderate with wide confidence intervals. CONCLUSIONS ClinCheck Pro systematically underestimates tooth widths compared with 3D OP and digital caliper (individually segmented teeth). In addition, clinicians need to be cautious while relying solely on ClinCheck's Bolton ratios estimation for the treatment plan. These findings may be due to "shape assumptions" in the interproximal areas and could have clinical implications.
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Affiliation(s)
- Arun Shailendran
- Discipline of Orthodontics, School of Dentistry, The University of Queensland, Brisbane, Australia.
| | - Tony Weir
- Discipline of Orthodontics, School of Dentistry, The University of Queensland, Brisbane, Australia
| | - Elissa Freer
- Discipline of Orthodontics, School of Dentistry, The University of Queensland, Brisbane, Australia
| | - Brett Kerr
- Discipline of Orthodontics, School of Dentistry, The University of Queensland, Brisbane, Australia
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Alshahrani AA, Alshahrani I, Addas MK, Shaik S, Binhomran FM, AlQahtani J. The Tooth Size Discrepancy among Orthodontic Patients and Normal Occlusion Individuals from Saudi Arabia: A Three-Dimensional Scan Analysis of Diagnostic Casts. Contemp Clin Dent 2020; 11:141-149. [PMID: 33110327 PMCID: PMC7583543 DOI: 10.4103/ccd.ccd_455_19] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 04/16/2020] [Accepted: 05/01/2020] [Indexed: 11/23/2022] Open
Abstract
Background/Purpose: Tooth size discrepancy is one of the causative factors of malocclusion. This study aimed to establish the TDS among various malocclusion classes and normal occlusion subjects in a Southern Saudi population. Materials and Methods: The study casts of orthodontic patients from Southern Saudi Arabia (mean age: 19.6 years ± 2.45; n = 120) were randomly selected and grouped into eight equal classes based on Angle's classification and gender. An additional 30 study casts, devoid of malocclusion, having excellent intercuspation and class I occlusion, were grouped into two controls (n = 15) based on gender. The study casts were three-dimensional scanned to measure mesiodistal widths of all the teeth. The calculated anterior ratios (AR) and overall ratio (OR) were statistically analyzed with analysis of variance and t-tests. Results: There were no significant differences in “OR” and “AR” between the genders (P > 0.05) and among the malocclusion and control subgroups (P > 0.05). The mean “OR” (92.01 ± 0.18) and “AR” (78.60 ± 0.27) of the malocclusion group were significantly higher than that of Bolton's ratios (P > 0.05). The “AR” of the control group was significantly higher than Bolton's standards (P = 0.048). However, “OR” was no different (P = 0.105). Malocclusion patients displayed a discrepancy (±2 standard deviation) in “AR” of 22.5% and 'OR' of 6.7% from Bolton's mean (BM). Similarly, the control group displayed a discrepancy in “AR” of 20% and “OR” of 10% from BM. Conclusion: The mean “OR” and “AR” of the Southern Saudi population showed no sexual dimorphism and no significant difference among various malocclusion and control subgroups. The “AR” of the malocclusion and control subgroups did not comply with Bolton's standards.
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Affiliation(s)
| | - Ibrahim Alshahrani
- Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Mohamed Khaled Addas
- Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Sharaz Shaik
- Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | | | - Jaber AlQahtani
- Consultant Restorative Dentist, M.O.H, Asir Central Hospital, Abha, Saudi Arabia
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Magkavali-Trikka P, Halazonetis DJ, Athanasiou AE. Estimation of root inclination of anterior teeth from virtual study models: accuracy of a commercial software. Prog Orthod 2019; 20:43. [PMID: 31754914 PMCID: PMC6872682 DOI: 10.1186/s40510-019-0298-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 11/08/2019] [Indexed: 11/11/2022] Open
Abstract
Background The aim of the study was to assess the accuracy of commercially available software in estimating anterior tooth root inclination from digital impressions of the crowns of the teeth. Subjects and methods Following sample size calculation and application of inclusion and exclusion criteria, 55 anterior natural teeth derived from 14 dry human skulls were selected. Impressions were taken and plaster study models were fabricated. Plaster models were scanned using the high-resolution mode of an Ortho Insight 3D laser scanner. The teeth on the digital scans were segmented and virtual roots were predicted and constructed by the Ortho Insight 3D software. The 55 natural teeth were removed from the dry skulls and scanned using the Identica extraoral white-light scanner in order to calculate their actual root angulation. The teeth were scanned twice, once to acquire the crown and the cervical part of the root, and a second time to acquire the remaining part of the root, including the apex. The two scanned segments were joined in software by superimposing them along their common part. The accuracy of the digital models generated by the Ortho Insight 3D scanner in predicting root angulation was assessed by comparing these results to the corresponding measurements of the 55 natural teeth. The long axes of the tooth models obtained from the software prediction and the scanning of the actual teeth were computed and the discrepancy between them was evaluated. The error of the methods was evaluated by repeating the measurements on 14 teeth and showed an acceptable range. Results The predicted tooth angulation was found to differ significantly from the actual angulation, both statistically and clinically. The angle between the predicted and actual long axes ranged from 2.0 to 37.6°(average 9.7°; median 7.4°). No statistically significant difference was found between tooth categories. Conclusions Further investigations and improvements of the software are needed before it can be considered clinically effective.
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Affiliation(s)
- Panagiota Magkavali-Trikka
- Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates.
| | - Demetrios J Halazonetis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
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Fallis DW. Assessing the accuracy of two posterior tooth-size discrepancy prediction methods based on virtual occlusal setups. Angle Orthod 2019; 90:239-246. [PMID: 31613145 DOI: 10.2319/053019-371.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To assess accuracy of the Bolton and Johnson/Bailey (JB) analyses in identifying clinically significant posterior tooth-size discrepancies using virtually constructed occlusal setups. MATERIALS AND METHODS Virtual models and cone-beam computed tomography data sets from 30 patients were utilized to construct 60 (two per patient) virtual posterior occlusal setups. Observed discrepancies in cusp-embrasure relationships were compared to estimated posterior interarch tooth-size discrepancies (ITSDs) calculated via Bolton and JB posterior analyses. Clinical significance for discrepancies was established at >1 mm from ideal cusp-embrasure relationships in accordance with current American Board of Orthodontics methodology. Data within groups were normally distributed, thus comparisons were completed via paired t-tests. Paired nominal data were analyzed utilizing McNemar's test, and simple linear regression was used to model the relationship of predicted to observed discrepancies. RESULTS McNemar's test revealed significant differences (P ≤ .05) between the Bolton and JB groups' frequencies in matching the virtual setups correctly. JB predictions matched 100% (right) and 97% (left) setups; whereas, Bolton predictions matched only 23% (right and left) setups. A positive correlation was observed between JB predictions and cusp-embrasure discrepancies, demonstrating that average posterior discrepancy values increased 0.28 mm for every 1 mm predicted via the JB analysis. CONCLUSIONS The JB analysis correctly characterized, but overestimated, the degree of posterior ITSDs corresponding to a clinically significant discrepancy in the virtual setups. Algebraically calculated posterior ITSDs based on the Overall and Anterior Bolton ratios were not accurate predictors of discrepancies observed in the virtual setups. Both Bolton and JB demonstrated weaknesses that limit precise identification of clinically significant ITSDs.
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Dastoori M, Bouserhal JP, Halazonetis DJ, Athanasiou AE. Anterior teeth root inclination prediction derived from digital models: A comparative study of plaster study casts and CBCT images. J Clin Exp Dent 2018; 10:e1069-e1074. [PMID: 30607223 PMCID: PMC6311401 DOI: 10.4317/jced.55180] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 10/03/2018] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND To assess the accuracy of digital models generated using commercially available software to predict anterior teeth root inclination characteristics and compare the results to relevant data obtained from CBCT images. MATERIAL AND METHODS Following sample size calculation and after application of inclusion and exclusion criteria, pre-treatment maxillary and mandibular plaster models and the corresponding CBCT scans of 31 patients attending a private orthodontic clinic were selected. The subjects were 10 males and 21 females with age range 12 to 40 years. Plaster models were scanned using the high resolution mode of an Ortho Insight 3D scanner and CBCT scans were taken using a Kodak 9500 Cone Beam 3D System machine. The teeth on the digital scans were segmented and virtual roots were predicted and constructed by the Ortho Insight 3D software. The long axes of the predicted roots and the actual roots, as segmented from the CBCT images, were computed using best-fit lines. The inter-axis angle was used to assess error in root inclination prediction by the software. Mann-Whitney and Kruskal-Wallis tests were used. Intra-examiner error was evaluated using the Bland-Altman method. RESULTS The maximum disparity in angle between images derived from digital models and CBCT data was almost 40 degrees (upper left canine). The upper and lower canines produced the worst results, followed by the lower lateral incisors. The upper central incisors showed the best results, although the maximum angle of difference exceeded 20 degrees (with the median around 8 degrees). CONCLUSIONS Root morphology imaging prediction is not a primary function of this software and this study confirmed its limitation as a sole tool in routine clinical applications. At present these predictions cannot be considered accurate or reliable unless correlated clinically with a radiographic image. Key words:Digital models, CBCT, tooth root inclination prediction software.
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Affiliation(s)
- Mahmoud Dastoori
- Former resident, Department of Orthodontics, Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE; Orthodontic Specialist, London Dental Clinic, Dubai, UAE
| | - Joseph P Bouserhal
- Professor, Department of Orthodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon
| | - Demetrios J Halazonetis
- Professor and Chairman, Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Athanasios E Athanasiou
- Dean and Professor of Orthodontics, Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE
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Ajami S, Fattahi H, Zare M, Jenabi P. Bolton discrepancy in an Iranian population and its relation with maxillary lateral incisors' size. Electron Physician 2018; 10:6454-6461. [PMID: 29765569 PMCID: PMC5942565 DOI: 10.19082/6454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Accepted: 06/02/2017] [Indexed: 11/20/2022] Open
Abstract
Background Bolton's two main ratios describing the proportional size of upper and lower teeth, could contribute to estimating the excess or deficiency of tooth size necessary to obtain an ideal occlusion. However, the mean Bolton values are not the same among different societies. Determining the prevalence of tooth size deviations from population-specific Bolton indices might help local orthodontists to have a more concise treatment plan. Objective The study aimed to define the prevalence of clinically significant tooth size discrepancies (TSD) in an Iranian population and to evaluate the influence of lateral incisors' size on this discrepancy. Methods This cross-sectional study was conducted on study casts of orthodontic patients attending Imam Reza Dental Clinic from September 2008 to December 2016. The sample comprised of 150 randomly selected pre-treatment study casts (64 males and 86 females from 17 to 28). The mesiodistal diameter of all permanent teeth from the first molar on the right to the first molar on the left was measured using 2 similar digital calipers, and Bolton analysis was calculated. Subjective visual estimation of Bolton discrepancy was also performed. SPSS v18.0, Wilcoxon signed ranks test, Pearson correlation and Receiver Operating Characteristic (ROC) curve analysis were used for statistical analysis. A p<0.05 was considered statistically significant. Results In the sample group, 34.7% had anterior Bolton index (ABI) and 20.7% had total Bolton index (TBI) greater than 2 Standard Deviations (2SDs) of Bolton's means, and about half of them required correction of the ABI considering the actual size of discrepancies (mm). The sensitivity of estimating clinically significant tooth size discrepancy more than 2SDs of Bolton's ABI and the visual judgment was 96.0% and a cut-off point of -0.12mm was obtained. Conclusion Bolton's analysis should be routinely performed in all orthodontic patients, and visual estimation of TSD would be suggested as a screening method in the first visit prior to measurements and set-ups.
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Affiliation(s)
- Shabnam Ajami
- DMD, MScD., Assistant Professor of Orthodontics, Othodontic Research Centre, Department of Orthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamidreza Fattahi
- DMD, MScD., Orhodontic Research Centre, Orthodontist, Private Practice, Shiraz, Iran
| | - Mahsa Zare
- Postgraduate Student, Department of Pediatric Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Peyman Jenabi
- Postgraduate Student of Endodontics, Department of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
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Bowes M, Dear W, Close E, Freer TJ. Tooth width measurement using the Lythos digital scanner. AUSTRALASIAN ORTHODONTIC JOURNAL 2017. [DOI: 10.21307/aoj-2020-087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Introduction
Digital models have become more widely accepted for orthodontic diagnostic purposes. Intraoral scanners have the advantage of eliminating the need for conventional impressions. The aim of the present study was to assess the reliability and reproducibility of the Lythos intraoral scanner and to determine if a significant advantage is delivered over stone model and caliper measurements in tooth width and Bolton ratio accuracy.
Methods
The study comprised 30 typodont models for which conventional alginate impressions and digital scans were obtained to generate stone and digital models, respectively. Mesiodistal tooth width measurements and Bolton ratios were obtained with either calipers and stone models or with Digicast (Ormco Lythos digital model software, Ormco, CA, USA) software using digital models. Pearson’s correlation coefficients tested intra-examiner reliability. Interclass correlation coefficients were used to assess agreement between examiners (reproducibility). The differences in the mean tooth width measurements and Bolton ratios from the typodont values and either the digital or conventional method were used to assess validity by applying two tailed t-tests.
Results
The measurements obtained from the Lythos and stone models had near perfect intra-examiner agreement (Pearson ≥ 0.98). The inter-examiner reproducibility for tooth widths, anterior Bolton and overall Bolton ratio was high and similar for both methods (Lythos scanner Interclass correlation coefficient (ICC) above 0.89, stone models ICC above 0.92). Stone model measurements were statistically twice as accurate as those derived from the digital system (0.032 mm versus 0.074 mm). There were no significant differences in accuracy between the methods for Bolton calculations. Clinically, there was no difference between the methods for tooth width measurements and Bolton calculations.
Conclusions
The Lythos system is as reliable and reproducible as conventional calipers and stone models in tooth width measurements and Bolton calculations. The caliper method presents a statistically more valid tooth width measurement technique but the clinical significance of this is questionable.
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Affiliation(s)
- Michael Bowes
- * Orthodontics Department , University of Queensland , Brisbane , QLD , Australia
| | - William Dear
- † private practice , Gold Coast , QLD , Australia
| | - Emily Close
- + private practice , Toowoomba , QLD , Australia
| | - Terrence J. Freer
- * Orthodontics Department , University of Queensland , Brisbane , QLD , Australia
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Three-dimensional evaluation of morphologic tooth symmetry in various malocclusions. Am J Orthod Dentofacial Orthop 2016; 150:459-66. [DOI: 10.1016/j.ajodo.2016.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 04/01/2016] [Accepted: 04/01/2016] [Indexed: 11/21/2022]
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Jiang T, Lee SM, Hou Y, Chang X, Hwang HS. Evaluation of digital dental models obtained from dental cone-beam computed tomography scan of alginate impressions. Korean J Orthod 2016; 46:129-36. [PMID: 27226958 PMCID: PMC4879315 DOI: 10.4041/kjod.2016.46.3.129] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 08/30/2015] [Accepted: 09/17/2015] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To investigate the dimensional accuracy of digital dental models obtained from the dental cone-beam computed tomography (CBCT) scan of alginate impressions according to the time elapse when the impressions are stored under ambient conditions. METHODS Alginate impressions were obtained from 20 adults using 3 different alginate materials, 2 traditional alginate materials (Alginoplast and Cavex Impressional) and 1 extended-pour alginate material (Cavex ColorChange). The impressions were stored under ambient conditions, and scanned by CBCT immediately after the impressions were taken, and then at 1 hour intervals for 6 hours. After reconstructing three-dimensional digital dental models, the models were measured and the data were analyzed to determine dimensional changes according to the elapsed time. The changes within the measurement error were regarded as clinically acceptable in this study. RESULTS All measurements showed a decreasing tendency with an increase in the elapsed time after the impressions. Although the extended-pour alginate exhibited a less decreasing tendency than the other 2 materials, there were no statistically significant differences between the materials. Changes above the measurement error occurred between the time points of 3 and 4 hours after the impressions. CONCLUSIONS The results of this study indicate that digital dental models can be obtained simply from a CBCT scan of alginate impressions without sending them to a remote laboratory. However, when the impressions are not stored under special conditions, they should be scanned immediately, or at least within 2 to 3 hours after the impressions are taken.
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Affiliation(s)
- Tingting Jiang
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Sang-Mi Lee
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Yanan Hou
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea.; Department of Orthodontics, Peking University School of Stomatology, Beijing, PR China
| | - Xin Chang
- Department of Orthodontics, Dalian Medical University, Dalian, PR China
| | - Hyeon-Shik Hwang
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea.; Dental Science Research Institute, Chonnam National University, Gwangju, Korea
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Dimensional accuracy of digital dental models from cone-beam computed tomography scans of alginate impressions according to time elapsed after the impressions. Am J Orthod Dentofacial Orthop 2016; 149:287-94. [PMID: 26827986 DOI: 10.1016/j.ajodo.2015.08.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 08/01/2015] [Accepted: 08/01/2015] [Indexed: 11/23/2022]
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Martin CB, Chalmers EV, McIntyre GT, Cochrane H, Mossey PA. Orthodontic scanners: what’s available? J Orthod 2015; 42:136-43. [DOI: 10.1179/1465313315y.0000000001] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Bugaighis I, Karanth D, Borzabadi-Farahani A. Tooth size discrepancy in a Libyan population, a cross-sectional study in schoolchildren. J Clin Exp Dent 2015; 7:e100-5. [PMID: 25810819 PMCID: PMC4367995 DOI: 10.4317/jced.51819] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 08/12/2014] [Indexed: 11/28/2022] Open
Abstract
UNLABELLED Objetives: The aim of this cross-sectional study was to investigate the tooth size discrepancy (TSD) in a group of Libyan schoolchildren, and to compare TSD between sexes. MATERIAL AND METHODS The sample comprised 333 Libyan schoolchildren (162 males with a mean (SD) age of 14.4 (1.1) years, and 171 females with a mean age of 14.1 (1.1) years). Anterior and overall TSD ratios were computed using descriptive statistics. Sex differences were statistically assessed using an independent t-test (P<0.05). RESULTS Males showed significantly wider MD tooth width compared to females (P<0.05), except for the maxillary first premolars and mandibular central incisors. There were significant differences (P<0.05) between the paired (right and left sides) tooth measurements except for the maxillary and mandibular central and lateral incisors as well as mandibular canines. The mean (SD) for overall and anterior TSD ratios were 91.3% (2.1) and 78.2% (2.6), respectively, with no significant sex differences for both variables (P> 0.05). The percentages of participants showing more than 2 SD variation for the anterior and overall ratios comprised 3% and 4.2% of the total sample, respectively. CONCLUSIONS The anterior and overall TSD ratios for the examined subjects were established and showed no significant sexual dimorphism. Key words:Tooth size discrepancy, Libyan, schoolchildren.
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Affiliation(s)
- Iman Bugaighis
- BDS, MDS, PhD. Department of Orthodontics, Dental Faculty, Benghazi University, Benghazi, Libya
| | - Divakar Karanth
- BDS, MDS, M Orth RCS. The Multispecialty Dental Clinic, Porvorim, Bardez, Goa, India
| | - Ali Borzabadi-Farahani
- MScD, M Orth RCS, Fellowship Craniofac Orth (CHLA/USC). Orthodontics, Warwick Dentistry, Warwick Medical School, University of Warwick, Coventry; Maxillofacial Unit and Orthodontics, Northampton General Hospital, Northampton, UK
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Shahid F, Khursheed Alam M, Fadhli Khamis M, Matsuda S, Shoumura M, Osuga N. Crown Dimension in relation to Arch Perimeter, Arch Length and Arch Width in Ideal Occlusion: A Digital Model Study. J HARD TISSUE BIOL 2015. [DOI: 10.2485/jhtb.24.289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Fazal Shahid
- Orthodontic Unit, School of Dental Science, Universiti Sains Malaysia
| | | | - Mohd Fadhli Khamis
- Forensic Dentistry Unit, School of Dental Science, Universiti Sains Malaysia
| | - Saeka Matsuda
- Department of Pediatric Denristry, Matsumoto Dental University, School of Dentistry
| | - Masahito Shoumura
- Department of Pediatric Denristry, Matsumoto Dental University, School of Dentistry
| | - Naoto Osuga
- Department of Pediatric Denristry, Matsumoto Dental University, School of Dentistry
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Shahid F, Khursheed Alam M, Fadhli Khamis M, Komori A, Kubo K, Maeda H. A New Method to Measure and Assess Tooth Size and Tooth Size Discrepancy Via Circumferential Measurements using Stereomicroscope. J HARD TISSUE BIOL 2015. [DOI: 10.2485/jhtb.24.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Fazal Shahid
- Orthodontic Unit, School of Dental Science, Universiti Sains Malaysia
| | | | - Mohd Fadhli Khamis
- Forensic Dentistry Unit, School of Dental Science, Universiti Sains Malaysia
| | - Atsuo Komori
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Katsutoshi Kubo
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Hatsuhiko Maeda
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
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Shqaidef A, Ayoub AF, Khambay BS. How accurate are rapid prototyped (RP) final orthognathic surgical wafers? A pilot study. Br J Oral Maxillofac Surg 2014; 52:609-14. [PMID: 24933576 DOI: 10.1016/j.bjoms.2014.04.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 04/21/2014] [Indexed: 10/25/2022]
Abstract
Computer packages have been introduced to simulate the movements of the jaw in three dimensions to facilitate planning of treatment. After final 3-dimensional virtual planning, a rapid prototype wafer can be manufactured and used in theatre. Our aim was to assess the accuracy of rapid prototyping of virtual wafers derived from laser scanned dental models using CAD/CAM software. Upper and lower plaster models from 10 orthognathic patients, the articulated models, and the conventional wafers were scanned. The virtual wafers were made from CAD/CAM software, and printed on a stereolithographic printer. We also scanned the articulated models with rapid prototype wafers in place. The validity of the final rapid prototype wafer was measured by the accuracy with which upper and lower models related to one another. The absolute mean error of the rapid prototype wafer when aligned with the dental models was 0.94 (0.09) mm. The absolute distance of the 2 models articulated by conventional and rapid prototype wafers ranged from 0.04 - 1.73mm. The rapid prototype wafers were able to orientate the upper and lower dental models with an absolute mean error of 0.94 (0.09) mm, but it ranged from 0.04-1.73mm.
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Affiliation(s)
- Abedalrahman Shqaidef
- Orthodontic Postgraduate Student, Glasgow Dental School, School of Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow
| | - Ashraf F Ayoub
- Professor of Oral and Maxillofacial Surgery, Glasgow Dental School, School of Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow
| | - Balvinder S Khambay
- Associate Professor of Orthodontics, Paediatric Dentistry and Orthodontics, Faculty of Dentistry, Hong Kong University, Hong Kong.
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