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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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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: 19] [Impact Index Per Article: 9.5] [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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Application of Three-Dimensional Digital Technology in Orthodontics: The State of the Art. Biomimetics (Basel) 2022; 7:biomimetics7010023. [PMID: 35225915 PMCID: PMC8883890 DOI: 10.3390/biomimetics7010023] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 01/11/2022] [Accepted: 01/24/2022] [Indexed: 12/10/2022] Open
Abstract
Three-dimensional technologies are one of the most recent and relevant advancements in the field of Dentistry. These systems, including intraoral scans, 3D imaging exams (CAT scan, CBCT and MRI), CAD/CAM 3D printing devices and 3D computer software, have enabled clinicians to greatly improve patient care along with reducing treatment planning time. The present descriptive study aims to explore possible applications of 3D technologies during the diagnosis, treatment plan, case monitoring and result assessment in orthodontics. The overall upgrade provided by these technologies can improve the clinicians’ workflow and effectiveness by simplifying conventional techniques considered to be especially arduous.
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Eghbali Zarch R, Askari M, boostani H, Mirzaii-Dizgah I. Effect of propolis extract on clinical parameters and salivary level of matrix metalloproteinase 8 in periodontitis patients: A randomized controlled clinical trial. JOURNAL OF ADVANCED PERIODONTOLOGY & IMPLANT DENTISTRY 2021; 13:84-89. [PMID: 35919679 PMCID: PMC9327480 DOI: 10.34172/japid.2021.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 09/14/2021] [Indexed: 11/09/2022]
Abstract
Background. Periodontitis is the bacterial-induced inflammation of tooth-supporting structures. Local antibacterial agents are used as adjunctive therapy in the treatment of periodontitis. This study aimed to compare the effect of subgingivally delivered propolis extract (a resin produced by honey bees) with chlorhexidine (CHX) mouthwash on clinical parameters and salivary levels of matrix metalloproteinase 8 (MMP-8) in periodontitis patients.Methods. Twenty-eight periodontitis patients in stage II or III and grade B, who had deep periodontal pockets (≥4 mm) around at least three non-adjacent teeth, were divided into two groups. In the control group, patients were prescribed 0.2% CHX mouthwash twice a day for two weeks. In the 20% propolis hydroalcoholic group, subgingival irrigation was performed twice a week for two weeks. Clinical parameters were measured at baseline and after two months. Salivary samples were collected from the propolis and control groups at baseline and two months later to assess MMP-8 levels using the enzyme-linked immunosorbent assay. Additionally, salivary samples from 12 periodontally healthy subjects were used to determine the normal levels of MMP-8. The data were analyzed using SPSS. P<0.05 was considered the level of significance.Results. In the healthy group, the mean salivary levels of MMP-8 were significantly lower than that in the control and propolis groups at baseline (P<0.001). The results indicated a significant improvement in clinical parameters (P<0.001) in the propolis group compared to the control group, while MMP-8 levels decreased significantly in both groups (P<0.001).Conclusion. Propolis is recommended as adjunctive therapy for periodontitis patients. Clinical trials registration code: IRCT2016122030475N3.
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Affiliation(s)
| | - Mitra Askari
- Oral and Maxillofacial Pathology Department, Faculty of Dentistry, Tehran University of Medical Sciences, International Campus, Tehran, Iran
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Clinical expression of programmed rotation and uprighting of bilateral winged maxillary central incisors with the Invisalign appliance: A retrospective study. Am J Orthod Dentofacial Orthop 2021; 161:74-83. [PMID: 34563426 DOI: 10.1016/j.ajodo.2020.06.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 05/01/2020] [Accepted: 06/01/2020] [Indexed: 11/20/2022]
Abstract
INTRODUCTION Winged maxillary central incisors (WMCI), defined as mesiopalatal rotation of the crowns of maxillary central incisors, is a common dental trait that affects smile esthetics. This retrospective study aimed to determine the efficacy of rotation and uprighting tooth movements of bilateral WMCI with Invisalign (Align Technology, Santa Clara, Calif). METHODS Initial, predicted, and achieved stereolithography files of 30 adult patients, consecutively treated with the Invisalign SmartTrack appliance, were superimposed using Geomagic Control X 64 (3D Systems, Rock Hill, SC). The pairs of incisors were assessed for rotation using the interlabial angle (ILA), and individual incisors were measured for rotation and tip. RESULTS Programmed rotation and uprighting of WMCI are mostly undercorrected with the Invisalign appliance. The mean shortfall in ILA was 10.5° (standard deviation [SD], 10.66; 95% confidence interval [CI], 5.89-14.19; P <0.001) for a mean predicted change of 35.27°. For individual incisors, a mean shortfall of 5.38° (SD, 5.88; 95% CI, 3.58-6.76; P <0.001) was found for a mean 18.75° predicted change in rotation. A mean predicted change in tip of 7.06° showed a mean shortfall of was 2.16° (SD, 3.86°; 95% CI, 1.03-3.01; P <0.001). A moderate and statistically significant correlation between shortfalls in rotation and tip was observed (r = 0.44). Linear regression analysis was used to formulate an equation as a clinical tool to determine the likely achieved outcome on the basis of the predicted change. CONCLUSIONS Predicted changes in rotation, ILA, and tip were both under and overexpressed. In particular, tip was dependent on the magnitude of planned change. The random inconsistencies in the clinical expression of rotation and tipping warrant careful monitoring and/or remedial actions such as overcorrections aligners.
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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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Behroozian A, Kalman L, Hemmatiyan M. Inclinometer: A new device for measuring intermolar torque and angle. JOURNAL OF ADVANCED PERIODONTOLOGY & IMPLANT DENTISTRY 2021; 13:97-99. [PMID: 35919676 PMCID: PMC9327474 DOI: 10.34172/japid.2021.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 07/09/2021] [Indexed: 11/09/2022]
Abstract
The torque of posterior teeth is of great importance in esthetics and occlusion. In the present article, we introduce a simple but useful device to measure intermolar torque. The device consists of two movable and adjustable arms that lie on the selected molar teeth bilaterally; the graduated plane at the body of the appliance then shows the intermolar torque. This device can measure intermolar torque easily and rapidly, with high validity and at a low cost.
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Affiliation(s)
- Ahmad Behroozian
- Department of Orthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Les Kalman
- Restorative Dentistry Chair, Dental Outreach, Schulich School of Medicine & Dentistry, Western University, Ontario, Canada
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Ploder O, Winsauer H, Juengling K, Grill F, Bissinger O, Wolff KD, Kolk A. Is There a Significant Difference in Relapse and Complication Rate of Surgically Assisted Rapid Palatal Expansion Using Tooth-Borne, Bone-Borne, and Orthodontic Mini-Implant-Borne Appliances? J Oral Maxillofac Surg 2020; 79:213-224. [PMID: 32422194 DOI: 10.1016/j.joms.2020.04.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 04/09/2020] [Accepted: 04/09/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE For surgically assisted rapid palatal expansion (SARPE), studies comparing different devices are missing. The aim was to evaluate expansion, relapse, and the complication rates for 3 different appliances. PATIENTS AND METHODS In this retrospective cohort study, tooth-borne (TB, n = 29), bone-borne (BB, n = 12), or orthodontic mini-implant (OMI)-borne (n = 13) appliances were used for SARPE in 2 clinical centers. Patients presenting with a maxillary width discrepancy greater than 5 mm were included. Measurements of cast models and radiographs were performed preoperatively, immediately after consolidation, and at 1 year postoperatively. All distances were measured between canines, premolars, and molars. Complications (tooth damage, infection, technical failure) were evaluated. The outcome variables were expansion, relapse, and complications. Type of appliance was selected as predictor variable. Within- and between-group differences regarding expansion, relapse, and complications for the 3 appliances were statistically analyzed. RESULTS In 54 patients (aged 28.8 ± 8.6 years), mean expansion (±standard deviation) for the TB, BB, and OMI appliances immediately after consolidation was 5.29 ± 1.39 mm, 5.22 ± 1.72 mm, and 3.81 ± 2.19 mm, respectively, at the dental level, and 5.51 ± 1.40 mm, 4.66 ± 2.03 mm, and 3.51 ± 1.66 mm, respectively, at the bone level. Mean (±standard deviation) relapse for the TB, BB, and OMI appliances at 1 year postoperatively measured 1.44 ± 1.01 mm, 0.76 ± 1.37 mm, and 0.27 ± 1.63 mm, respectively, at the tooth level and 1.19 ± 0.93 mm, 0.71 ± 0.96 mm, and 0.12 ± 1.56 mm, respectively, at the bone level. Analysis of variance and the Tukey test showed significant differences between the TB and OMI appliances for expansion and relapse (P = .034 and P = .024, respectively). The overall complication rate differed significantly (P < .001), with rates of 17.2%, 66.7%, and 15.4% for the TB, BB, and OMI appliances, respectively. CONCLUSIONS BB and OMI appliances resulted in less relapse. Owing to the high complication rate, the further use of BB appliances is questionable.
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Affiliation(s)
- Oliver Ploder
- Head of Department of Oral and Maxillofacial Surgery, Academic Teaching Hospital Feldkirch, Feldkirch, Austria
| | | | - Katharina Juengling
- Postdoctoral Student, Department of Oral- and Craniomaxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany
| | - Florian Grill
- Resident, Department of Oral- and Craniomaxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany
| | - Oliver Bissinger
- Senior Physician, Department of Oral- and Craniomaxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany
| | - Klaus-Dietrich Wolff
- Head of Department of Oral- and Craniomaxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany
| | - Andreas Kolk
- Head of Department of Oral and Maxillofacial Surgery, Medical University Innsbruck, Innsbruck, Austria; Formerly, Executive Senior Physician, Department of Oral- and Craniomaxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany.
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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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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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Becker K, Wilmes B, Grandjean C, Vasudavan S, Drescher D. Skeletally anchored mesialization of molars using digitized casts and two surface-matching approaches : Analysis of treatment effects. J Orofac Orthop 2017; 79:11-18. [PMID: 29134232 DOI: 10.1007/s00056-017-0108-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 07/26/2017] [Indexed: 01/26/2023]
Abstract
PURPOSE To (1) quantify the three-dimensional treatment effect of a Mesialslider appliance using superimposed digital models, (2) to evaluate anchorage loss (measured by incisor displacement), and (3) to assess agreement between two different matching approaches, i.e., control point (CP)-based and iterative closest point (ICP) matching. METHODS In a retrospective study, the effects of a skeletally anchored uni- and bilateral mesialization appliance (Mesialslider) as well as simultaneous mesialization and distalization appliance (Mesio-Distalslider) were evaluated in 48 subjects (aged 11-53 years). Pre- and posttreatment casts were digitized and superimposed with two different approaches, i.e., using ten manually selected control points located at the anterior palate and by means of an automated ICP-matching approach using a standardized palatal reference area. The treatment effects were evaluated using control points on the maxillary central incisors and maxillary molar teeth, and the methods were compared through the application of linear regression analyses and computation of alignment errors. RESULTS Average upper molar mesialization was 6.3 ± 2.6 mm. Anchorage loss, designated as the mean amount of upper incisor displacement, was less than 0.5 mm in all dimensions investigated. Using the measurement method sufficient registration was possible using both approaches and corresponding tooth movements were significantly correlated (p < 0.01). CONCLUSIONS Accurate measurements of tooth displacement can be performed using both CP- and ICP-based matching approaches. Within the limits of performing a retrospective study, a premolar width of molar mesialization appeared possible without clinically relevant anchorage loss.
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Affiliation(s)
- Kathrin Becker
- Department of Orthodontics, University of Düsseldorf, 40225, Düsseldorf, Germany.
| | - Benedict Wilmes
- Department of Orthodontics, University of Düsseldorf, 40225, Düsseldorf, Germany
| | - Chantal Grandjean
- Department of Orthodontics, University of Düsseldorf, 40225, Düsseldorf, Germany
| | - Sivabalan Vasudavan
- Faculty of Science, The University of Western Australia, Perth, Australia.,Department of Dentistry, Boston Children's Hospital, Boston, MA, USA.,Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA
| | - Dieter Drescher
- Department of Orthodontics, University of Düsseldorf, 40225, Düsseldorf, Germany
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Talaat S, Kaboudan A, Bourauel C, Ragy N, Kula K, Ghoneima A. Validity and reliability of three-dimensional palatal superimposition of digital dental models. Eur J Orthod 2017; 39:365-370. [DOI: 10.1093/ejo/cjx008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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14
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Sawchuk D, Currie K, Vich ML, Palomo JM, Flores-Mir C. Diagnostic methods for assessing maxillary skeletal and dental transverse deficiencies: A systematic review. Korean J Orthod 2016; 46:331-42. [PMID: 27668196 PMCID: PMC5033772 DOI: 10.4041/kjod.2016.46.5.331] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 02/29/2016] [Accepted: 03/15/2016] [Indexed: 12/03/2022] Open
Abstract
Objective To evaluate the accuracy and reliability of the diagnostic tools available for assessing maxillary transverse deficiencies. Methods An electronic search of three databases was performed from their date of establishment to April 2015, with manual searching of reference lists of relevant articles. Articles were considered for inclusion if they reported the accuracy or reliability of a diagnostic method or evaluation technique for maxillary transverse dimensions in mixed or permanent dentitions. Risk of bias was assessed in the included articles, using the Quality Assessment of Diagnostic Accuracy Studies tool-2. Results Nine articles were selected. The studies were heterogeneous, with moderate to low methodological quality, and all had a high risk of bias. Four suggested that the use of arch width prediction indices with dental cast measurements is unreliable for use in diagnosis. Frontal cephalograms derived from cone-beam computed tomography (CBCT) images were reportedly more reliable for assessing intermaxillary transverse discrepancies than posteroanterior cephalograms. Two studies proposed new three-dimensional transverse analyses with CBCT images that were reportedly reliable, but have not been validated for clinical sensitivity or specificity. No studies reported sensitivity, specificity, positive or negative predictive values or likelihood ratios, or ROC curves of the methods for the diagnosis of transverse deficiencies. Conclusions Current evidence does not enable solid conclusions to be drawn, owing to a lack of reliable high quality diagnostic studies evaluating maxillary transverse deficiencies. CBCT images are reportedly more reliable for diagnosis, but further validation is required to confirm CBCT's accuracy and diagnostic superiority.
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Affiliation(s)
- Dena Sawchuk
- Department of Dentistry, School of Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Kris Currie
- Department of Dentistry, School of Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Manuel Lagravere Vich
- Department of Dentistry, School of Dentistry, University of Alberta, Edmonton, AB, Canada
| | | | - Carlos Flores-Mir
- Department of Dentistry, School of Dentistry, University of Alberta, Edmonton, AB, Canada
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