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Zuo Q, Li A, Teng H, Liu Z. Influence of internal angle and shape of the lining on residual stress of Class II molar restorations. Comput Methods Biomech Biomed Engin 2024; 27:680-688. [PMID: 38229450 DOI: 10.1080/10255842.2024.2301792] [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: 09/19/2023] [Accepted: 12/28/2023] [Indexed: 01/18/2024]
Abstract
Polymerization shrinkage is a major side effect of resin composite materials that affects the success and longevity of caries restorations. This study was to analyze the effect of the internal angle and shape of the lining on the shrinkage residual stress of dental restorations in Class II mesio-occlusal-distal (MOD) cavities through finite element analysis (FEA). A 3D reconstructed model of a human mandibular first molar was created from micro-CT images, and then the tooth was prepared as a Class II MOD cavity. 3D models of four regular internal corner shapes of Class II MOD cavities with different internal angles of lining and one 90° filleted corner model were created. The thermal expansion technique was applied to approximate the shrinkage impact of composite resin polymerization in the FE software ABAQUS. Von Mises stress was taken as a metric. The results showed that the level of residual stresses in the Class II MOD cavities was greatly dependent on the internal angle of the lining. The maximum von Mises stress in tooth tissue decreased as the internal angle of the lining increased. The internal shapes of the lining had no obvious effect on the stress, and the filleted corner model had less stress. This lining strategy is appropriate for Class II MOD cavities with serious loss of tooth tissue.
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Affiliation(s)
- Qianqian Zuo
- Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China
- Sichuan University Yibin Park, Yibin Institute of Industrial Technology, Yibin, China
| | - Annan Li
- Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China
- Sichuan University Yibin Park, Yibin Institute of Industrial Technology, Yibin, China
| | - Haidong Teng
- Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China
- Sichuan University Yibin Park, Yibin Institute of Industrial Technology, Yibin, China
| | - Zhan Liu
- Key Lab for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu, China
- Sichuan University Yibin Park, Yibin Institute of Industrial Technology, Yibin, China
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Effects of photobiomodulation at different wavelengths on orthodontically induced root resorption in orthodontic retention period: a micro-CT and RT-PCR study. Lasers Med Sci 2020; 35:1419-1429. [DOI: 10.1007/s10103-020-03014-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 03/30/2020] [Indexed: 02/05/2023]
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Wallner J, Schwaiger M, Hochegger K, Gsaxner C, Zemann W, Egger J. A review on multiplatform evaluations of semi-automatic open-source based image segmentation for cranio-maxillofacial surgery. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2019; 182:105102. [PMID: 31610359 DOI: 10.1016/j.cmpb.2019.105102] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 09/09/2019] [Accepted: 09/27/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND AND OBJECTIVES Computer-assisted technologies, such as image-based segmentation, play an important role in the diagnosis and treatment support in cranio-maxillofacial surgery. However, although many segmentation software packages exist, their clinical in-house use is often challenging due to constrained technical, human or financial resources. Especially technological solutions or systematic evaluations of open-source based segmentation approaches are lacking. The aim of this contribution is to assess and review the segmentation quality and the potential clinical use of multiple commonly available and license-free segmentation methods on different medical platforms. METHODS In this contribution, the quality and accuracy of open-source segmentation methods was assessed on different platforms using patient-specific clinical CT-data and reviewed with the literature. The image-based segmentation algorithms GrowCut, Robust Statistics Segmenter, Region Growing 3D, Otsu & Picking, Canny Segmentation and Geodesic Segmenter were investigated in the mandible on the platforms 3D Slicer, MITK and MeVisLab. Comparisons were made between the segmentation algorithms and the ground truth segmentations of the same anatomy performed by two clinical experts (n = 20). Assessment parameters were the Dice Score Coefficient (DSC), the Hausdorff Distance (HD), and Pearsons correlation coefficient (r). RESULTS The segmentation accuracy was highest with the GrowCut (DSC 85.6%, HD 33.5 voxel) and the Canny (DSC 82.1%, HD 8.5 voxel) algorithm. Statistical differences between the assessment parameters were not significant (p < 0.05) and correlation coefficients were close to the value one (r > 0.94) for any of the comparison made between the segmentation methods and the ground truth schemes. Functionally stable and time-saving segmentations were observed. CONCLUSION High quality image-based semi-automatic segmentation was provided by the GrowCut and the Canny segmentation method. In the cranio-maxillofacial complex, these segmentation methods provide algorithmic alternatives for image-based segmentation in the clinical practice for e.g. surgical planning or visualization of treatment results and offer advantages through their open-source availability. This is the first systematic multi-platform comparison that evaluates multiple license-free, open-source segmentation methods based on clinical data for the improvement of algorithms and a potential clinical use in patient-individualized medicine. The results presented are reproducible by others and can be used for clinical and research purposes.
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Affiliation(s)
- Jürgen Wallner
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria; Computer Algorithms for Medicine Laboratory, Graz 8010, Austria.
| | - Michael Schwaiger
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria; Computer Algorithms for Medicine Laboratory, Graz 8010, Austria
| | - Kerstin Hochegger
- Computer Algorithms for Medicine Laboratory, Graz 8010, Austria; Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz 8010, Austria
| | - Christina Gsaxner
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria; Computer Algorithms for Medicine Laboratory, Graz 8010, Austria; Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz 8010, Austria
| | - Wolfgang Zemann
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria
| | - Jan Egger
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria; Computer Algorithms for Medicine Laboratory, Graz 8010, Austria; Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz 8010, Austria; Shanghai Jiao Tong University, School of Mechanical Engineering, Dong Chuan Road 800, Shanghai 200240, China
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Ausiello P, Ciaramella S, Di Rienzo A, Lanzotti A, Ventre M, Watts DC. Adhesive class I restorations in sound molar teeth incorporating combined resin-composite and glass ionomer materials: CAD-FE modeling and analysis. Dent Mater 2019; 35:1514-1522. [PMID: 31395448 DOI: 10.1016/j.dental.2019.07.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 07/22/2019] [Accepted: 07/22/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To investigate the influence of different resin composite and glass ionomer cement material combinations in a "bi-layer" versus a "single-layer" adhesive technique for class I cavity restorations in molars using numerical finite element analysis (FEA). MATERIALS AND METHODS Three virtual restored lower molar models with class I cavities 4mm deep were created from a sound molar CAD model. A combination of an adhesive and flowable composite with bulk fill composite (model A), of a glass ionomer cement with bulk fill composite (model B) and of an adhesive with bulk fill composite (model C), were considered. Starting from CAD models, 3D-finite element (FE) models were created and analyzed. Solid food was modeled on the occlusal surface and slide-type contact elements were used between tooth surface and food. Polymerization shrinkage was simulated for the composite materials. Physiological masticatory loads were applied to these systems combined with shrinkage. Static linear analyses were carried out. The maximum normal stress criterion was adopted as a measure of potential damage. RESULTS All models exhibited high stresses principally located along the tooth tissues-restoration interfaces. All models showed a similar stress trend along enamel-restoration interface, where stresses up to 22MPa and 19MPa was recorded in the enamel and restoration, respectively. A and C models showed a similar stress trend along the dentin-restoration interface with a lower stress level in model A, where stresses up to 11.5MPa and 7.5MPa were recorded in the dentin and restoration, respectively, whereas stresses of 17MPa and 9MPa were detected for model C. In contrast to A and C models, the model B showed a reduced stress level in dentin, in the lower restoration layer and no stress on the cavity floor. SIGNIFICANCE FE analysis supported the positive effect of a "bi-layer" restorative technique in a 4mm deep class I cavities in lower molars versus "single-layer" bulk fill composite technique.
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Affiliation(s)
- Pietro Ausiello
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Italy.
| | - Stefano Ciaramella
- Department of Industrial Engineering, Fraunhofer JL IDEAS - University of Naples Federico II, Italy
| | - Alessandra Di Rienzo
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Italy
| | - Antonio Lanzotti
- Department of Industrial Engineering, Fraunhofer JL IDEAS - University of Naples Federico II, Italy
| | - Maurizio Ventre
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II & Center for Advanced Biomaterials for HealthCare@CRIB, Istituto Italiano di Tecnologia, Naples, Italy
| | - David C Watts
- School of Medical Sciences and Photon Science Institute, University of Manchester, United Kingdom
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López Gualdrón CI, Bravo Ibarra ER, Murillo Bohórquez AP, Garnica Bohórquez I. Present and future for technologies to develop patient-specific medical devices: a systematic review approach. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2019; 12:253-273. [PMID: 31496840 PMCID: PMC6689557 DOI: 10.2147/mder.s215947] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 07/08/2019] [Indexed: 01/25/2023] Open
Abstract
The main purpose of this investigation was to systematically review the literature regarding case studies on patient-specific implants and devices, with the goal of analyzing the process of developing custom-made medical devices. A content analysis was performed to identify design processes and methodologies implemented to develop devices such as implants adapted to bone geometries. Reverse engineering, computer-aided design, simulation of assets, and rapid prototyping technologies were selected according to their interoperability in a process framework for developing new products. Finally, results from the case studies and process stages identified in the consulted research were analyzed. These results showed a relationship between the scope and complexity of the process and the stage of technology integration of the patient-specific device development. The analyzed case studies were characterized by technical, scientific, and multidisciplinary components to achieve research goals. Likewise, integration of technologies using patient-specific technologies is needed for product development that converges into designing devices, such as implants, biomodels, and cutting drilling guides.
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Affiliation(s)
| | - Edna-Rocío Bravo Ibarra
- Industrial and Business Studies School, Universidad Industrial de Santander, Bucaramanga, Colombia
| | | | - Israel Garnica Bohórquez
- Industrial and Business Studies School, Universidad Industrial de Santander, Bucaramanga, Colombia
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Lanzotti A, Martorelli M, Maietta S, Gerbino S, Penta F, Gloria A. A comparison between mechanical properties of specimens 3D printed with virgin and recycled PLA. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.procir.2019.02.030] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jeon JH, Hwang SS, Kim JH, Kim WC. Trueness and precision of scanning abutment impressions and stone models according to dental CAD/CAM evaluation standards. J Adv Prosthodont 2018; 10:335-339. [PMID: 30370023 PMCID: PMC6202429 DOI: 10.4047/jap.2018.10.5.335] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 04/15/2018] [Accepted: 05/08/2018] [Indexed: 11/17/2022] Open
Abstract
PURPOSE The purpose of the present study was to compare scanning trueness and precision between an abutment impression and a stone model according to dental computer-aided design/computer-aided manufacturing (CAD/CAM) evaluation standards. MATERIALS AND METHODS To evaluate trueness, the abutment impression and stone model were scanned to obtain the first 3-dimensional (3-D) stereolithography (STL) file. Next, the abutment impression or stone model was removed from the scanner and re-fixed on the table; scanning was then repeated so that 11 files were obtained for each scan type. To evaluate precision, the abutment impression or stone model was scanned to obtain the first 3-D STL file. Without moving it, scanning was performed 10 more times, so that 11 files were obtained for each scan type. By superimposing the first scanned STL file onto the other STL files one by one, 10 color-difference maps and reports were obtained; i.e., 10 experimental scans per type. The independent t-test was used to compare root mean square (RMS) data between the groups (α=.05). RESULTS The RMS±SD values of scanning trueness of the abutment impression and stone model were 22.4±4.4 and 17.4±3.5 µm, respectively (P<.012). The RMS±SD values of scanning precision of the abutment impression and stone model were 16.4±2.9 and 14.6±1.6 µm, respectively (P=.108). CONCLUSION There was a significant difference in scanning trueness between the abutment impression and stone model, as evaluated according to dental CAD/CAM standards. However, all scans showed high trueness and precision.
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Affiliation(s)
- Jin-Hun Jeon
- Department of Dental Technology, Medical Campus, Kyung-Dong University, Wonju, Republic of Korea
| | - Seong-Sig Hwang
- Department of Dental Technology, Medical Campus, Kyung-Dong University, Wonju, Republic of Korea
| | - Ji-Hwan Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea
| | - Woong-Chul Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea
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Wallner J, Hochegger K, Chen X, Mischak I, Reinbacher K, Pau M, Zrnc T, Schwenzer-Zimmerer K, Zemann W, Schmalstieg D, Egger J. Clinical evaluation of semi-automatic open-source algorithmic software segmentation of the mandibular bone: Practical feasibility and assessment of a new course of action. PLoS One 2018; 13:e0196378. [PMID: 29746490 PMCID: PMC5944980 DOI: 10.1371/journal.pone.0196378] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 04/12/2018] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Computer assisted technologies based on algorithmic software segmentation are an increasing topic of interest in complex surgical cases. However-due to functional instability, time consuming software processes, personnel resources or licensed-based financial costs many segmentation processes are often outsourced from clinical centers to third parties and the industry. Therefore, the aim of this trial was to assess the practical feasibility of an easy available, functional stable and licensed-free segmentation approach to be used in the clinical practice. MATERIAL AND METHODS In this retrospective, randomized, controlled trail the accuracy and accordance of the open-source based segmentation algorithm GrowCut was assessed through the comparison to the manually generated ground truth of the same anatomy using 10 CT lower jaw data-sets from the clinical routine. Assessment parameters were the segmentation time, the volume, the voxel number, the Dice Score and the Hausdorff distance. RESULTS Overall semi-automatic GrowCut segmentation times were about one minute. Mean Dice Score values of over 85% and Hausdorff Distances below 33.5 voxel could be achieved between the algorithmic GrowCut-based segmentations and the manual generated ground truth schemes. Statistical differences between the assessment parameters were not significant (p<0.05) and correlation coefficients were close to the value one (r > 0.94) for any of the comparison made between the two groups. DISCUSSION Complete functional stable and time saving segmentations with high accuracy and high positive correlation could be performed by the presented interactive open-source based approach. In the cranio-maxillofacial complex the used method could represent an algorithmic alternative for image-based segmentation in the clinical practice for e.g. surgical treatment planning or visualization of postoperative results and offers several advantages. Due to an open-source basis the used method could be further developed by other groups or specialists. Systematic comparisons to other segmentation approaches or with a greater data amount are areas of future works.
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Affiliation(s)
- Jürgen Wallner
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
- Computer Algorithms for Medicine (Cafe) Laboratory, Graz, Austria
| | - Kerstin Hochegger
- Computer Algorithms for Medicine (Cafe) Laboratory, Graz, Austria
- Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz, Austria
| | - Xiaojun Chen
- School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Irene Mischak
- Department of Dental Medicine and Oral Health, Medical University of Graz, Billrothgasse 4, Graz, Austria
| | - Knut Reinbacher
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Mauro Pau
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Tomislav Zrnc
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Katja Schwenzer-Zimmerer
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Wolfgang Zemann
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Dieter Schmalstieg
- Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz, Austria
| | - Jan Egger
- Computer Algorithms for Medicine (Cafe) Laboratory, Graz, Austria
- Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz, Austria
- BioTechMed-Graz, Krenngasse 37/1, Graz, Austria
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Calì M, Zanetti EM, Oliveri SM, Asero R, Ciaramella S, Martorelli M, Bignardi C. Influence of thread shape and inclination on the biomechanical behaviour of plateau implant systems. Dent Mater 2018; 34:460-469. [DOI: 10.1016/j.dental.2018.01.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 01/14/2018] [Accepted: 01/14/2018] [Indexed: 10/18/2022]
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Ausiello P, Ciaramella S, Fabianelli A, Gloria A, Martorelli M, Lanzotti A, Watts DC. Mechanical behavior of bulk direct composite versus block composite and lithium disilicate indirect Class II restorations by CAD-FEM modeling. Dent Mater 2017; 33:690-701. [DOI: 10.1016/j.dental.2017.03.014] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 03/17/2017] [Accepted: 03/17/2017] [Indexed: 11/28/2022]
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Ausiello P, Ciaramella S, Garcia-Godoy F, Gloria A, Lanzotti A, Maietta S, Martorelli M. The effects of cavity-margin-angles and bolus stiffness on the mechanical behavior of indirect resin composite class II restorations. Dent Mater 2017; 33:e39-e47. [DOI: 10.1016/j.dental.2016.11.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 10/28/2016] [Accepted: 11/01/2016] [Indexed: 10/20/2022]
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Rudolph H, Salmen H, Moldan M, Kuhn K, Sichwardt V, Wöstmann B, Luthardt RG. Accuracy of intraoral and extraoral digital data acquisition for dental restorations. J Appl Oral Sci 2016; 24:85-94. [PMID: 27008261 PMCID: PMC4775014 DOI: 10.1590/1678-775720150266] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 10/04/2015] [Indexed: 12/13/2022] Open
Abstract
The computer-aided design (CAD) and computer-aided manufacturing (CAM) process chain for dental restorations starts with taking an impression of the clinical situation. For this purpose, either extraoral digitization of gypsum models or intraoral digitization can be used. Despite the increasing use of dental digitizing systems, there are only few studies on their accuracy.
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Affiliation(s)
- Heike Rudolph
- Klinik für Zahnärztliche Prothetik, Zentrum Zahn-, Mund-, und Kieferheilkunde, Universität Ulm, Ulm, Germany
| | - Harald Salmen
- Klinik für Zahnärztliche Prothetik, Zentrum Zahn-, Mund-, und Kieferheilkunde, Universität Ulm, Ulm, Germany
| | - Matthias Moldan
- Klinik für Zahnärztliche Prothetik, Zentrum Zahn-, Mund-, und Kieferheilkunde, Universität Ulm, Ulm, Germany
| | - Katharina Kuhn
- Klinik für Zahnärztliche Prothetik, Zentrum Zahn-, Mund-, und Kieferheilkunde, Universität Ulm, Ulm, Germany
| | - Viktor Sichwardt
- Poliklinik für Zahnärztliche Prothetik, Justus-Liebig Universität, Giessen, Germany
| | - Bernd Wöstmann
- Poliklinik für Zahnärztliche Prothetik, Justus-Liebig Universität, Giessen, Germany
| | - Ralph Gunnar Luthardt
- Klinik für Zahnärztliche Prothetik, Zentrum Zahn-, Mund-, und Kieferheilkunde, Universität Ulm, Ulm, Germany
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Jeon JH, Kim DY, Lee JJ, Kim JH, Kim WC. Repeatability and reproducibility of individual abutment impression, assessed with a blue light scanner. J Adv Prosthodont 2016; 8:214-8. [PMID: 27350856 PMCID: PMC4919492 DOI: 10.4047/jap.2016.8.3.214] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 03/02/2016] [Accepted: 04/26/2016] [Indexed: 11/23/2022] Open
Abstract
PURPOSE We assessed the repeatability and reproducibility of abutment teeth dental impressions, digitized with a blue light scanner, by comparing the discrepancies in repeatability and reproducibility values for different types of abutment teeth. MATERIALS AND METHODS To evaluate repeatability, impressions of the canine, first premolar, and first molar, prepared for ceramic crowns, were repeatedly scanned to acquire 5 sets of 3-dimensional data via stereolithography (STL) files. Point clouds were compared and the error sizes were measured (n=10, per type). To evaluate reproducibility, the impressions were rotated by 10-20° on the table and scanned. These data were compared to the first STL data and the error sizes were measured (n=5, per type). One-way analysis of variance was used to assess the repeatability and reproducibility of the 3 types of teeth, and Tukey honest significant differences (HSD) multiple comparison test was used for post hoc comparisons (α=.05). RESULTS The differences with regard to repeatability were 4.5, 2.7, and 3.1 µm for the canine, premolar, and molar, indicating the poorest repeatability for the canine (P<.001). For reproducibility, the differences were 6.6, 5.8, and 11.0 µm indicating the poorest reproducibility for the molar (P=.007). CONCLUSION Our results indicated that impressions of individual abutment teeth, digitized with a blue light scanner, had good repeatability and reproducibility.
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Affiliation(s)
- Jin-Hun Jeon
- Department of Dental Technology, Medical campus, KyungDong University, Wonju, Republic of Korea
| | - Dong-Yeon Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea
| | - Jae-Jun Lee
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea
| | - Ji-Hwan Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea
| | - Woong-Chul Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea
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Szymor P, Kozakiewicz M, Olszewski R. Accuracy of open-source software segmentation and paper-based printed three-dimensional models. J Craniomaxillofac Surg 2016; 44:202-9. [DOI: 10.1016/j.jcms.2015.11.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 10/08/2015] [Accepted: 11/04/2015] [Indexed: 10/22/2022] Open
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Martorelli M, Maietta S, Gloria A, De Santis R, Pei E, Lanzotti A. Design and Analysis of 3D Customized Models of a Human Mandible. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.procir.2015.11.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Jeon JH, Choi BY, Kim CM, Kim JH, Kim HY, Kim WC. Three-dimensional evaluation of the repeatability of scanned conventional impressions of prepared teeth generated with white- and blue-light scanners. J Prosthet Dent 2015; 114:549-53. [DOI: 10.1016/j.prosdent.2015.04.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 04/21/2015] [Accepted: 04/22/2015] [Indexed: 11/24/2022]
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Hayashi K, Chung O, Park S, Lee SP, Sachdeva RC, Mizoguchi I. Influence of standardization on the precision (reproducibility) of dental cast analysis with virtual 3-dimensional models. Am J Orthod Dentofacial Orthop 2015; 147:373-80. [DOI: 10.1016/j.ajodo.2014.11.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 11/01/2014] [Accepted: 11/01/2014] [Indexed: 11/26/2022]
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Diagnostic Applications of Cone-Beam CT for Periodontal Diseases. Int J Dent 2014; 2014:865079. [PMID: 24803932 PMCID: PMC3997156 DOI: 10.1155/2014/865079] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 02/03/2014] [Indexed: 01/31/2023] Open
Abstract
Objectives. This paper aims to review the diagnostic application of cone beam computed tomography (CBCT) in the field of periodontology. Data. Original articles that reported on the use of CBCT for periodontal disease diagnosis were included. Sources. MEDLINE (1990 to January 2014), PubMed (using medical subject headings), and Google Scholar were searched using the following terms in different combinations: “CBCT,” “volumetric CT,” “periodontal disease ,” and “periodontitis.” This was supplemented by hand-searching in peer-reviewed journals and cross-referenced with the articles accessed. Conclusions. Bony defects, caters, and furcation involvements seem to be better depicted on CBCT, whereas bone quality and periodontal ligament space scored better on conventional intraoral radiography. CBCT does not offer a significant advantage over conventional radiography for assessing the periodontal bone levels.
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