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Validation of a technique for integration of a digital dental model into stereophotogrammetric images of the face using cone-beam computed tomographic data. Br J Oral Maxillofac Surg 2016; 54:584-6. [DOI: 10.1016/j.bjoms.2016.01.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 01/14/2016] [Indexed: 11/22/2022]
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52
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The impact of different cone beam computed tomography and multi-slice computed tomography scan parameters on virtual three-dimensional model accuracy using a highly precise ex vivo evaluation method. J Craniomaxillofac Surg 2016; 44:632-6. [DOI: 10.1016/j.jcms.2016.02.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 01/15/2016] [Accepted: 02/04/2016] [Indexed: 11/20/2022] Open
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53
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Comparison of digital dental images yielded by digital dental casts, cone-beam computed tomography, and multislice computed tomography for measurement of dental area. Oral Radiol 2016. [DOI: 10.1007/s11282-016-0242-z] [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]
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54
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Lee SJ, Woo SY, Huh KH, Lee SS, Heo MS, Choi SC, Han JJ, Yang HJ, Hwang SJ, Yi WJ. Virtual skeletal complex model- and landmark-guided orthognathic surgery system. J Craniomaxillofac Surg 2016; 44:557-68. [PMID: 27012762 DOI: 10.1016/j.jcms.2016.02.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 01/30/2016] [Accepted: 02/19/2016] [Indexed: 11/26/2022] Open
Abstract
In this study, correction of the maxillofacial deformities was performed by repositioning bone segments to an appropriate location according to the preoperative planning in orthognathic surgery. The surgery was planned using the patient's virtual skeletal models fused with optically scanned three-dimensional dentition. The virtual maxillomandibular complex (MMC) model of the patient's final occlusal relationship was generated by fusion of the maxillary and mandibular models with scanned occlusion. The final position of the MMC was simulated preoperatively by planning and was used as a goal model for guidance. During surgery, the intraoperative registration was finished immediately using only software processing. For accurate repositioning, the intraoperative MMC model was visualized on the monitor with respect to the simulated MMC model, and the intraoperative positions of multiple landmarks were also visualized on the MMC surface model. The deviation errors between the intraoperative and the final positions of each landmark were visualized quantitatively. As a result, the surgeon could easily recognize the three-dimensional deviation of the intraoperative MMC state from the final goal model without manually applying a pointing tool, and could also quickly determine the amount and direction of further MMC movements needed to reach the goal position. The surgeon could also perform various osteotomies and remove bone interference conveniently, as the maxillary tracking tool could be separated from the MMC. The root mean square (RMS) difference between the preoperative planning and the intraoperative guidance was 1.16 ± 0.34 mm immediately after repositioning. After surgery, the RMS differences between the planning and the postoperative computed tomographic model were 1.31 ± 0.28 mm and 1.74 ± 0.73 mm for the maxillary and mandibular landmarks, respectively. Our method provides accurate and flexible guidance for bimaxillary orthognathic surgery based on intraoperative visualization and quantification of deviations for simulated postoperative MMC and landmarks. The guidance using simulated skeletal models and landmarks can complement and improve conventional navigational surgery for bone repositioning in the craniomaxillofacial area.
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Affiliation(s)
- Sang-Jeong Lee
- Department of Biomedical Radiation Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
| | - Sang-Yoon Woo
- Department of Biomedical Radiation Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
| | - Kyung-Hoe Huh
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Sam-Sun Lee
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Min-Suk Heo
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Soon-Chul Choi
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Jeong Joon Han
- Department of Oral and Maxillofacial Surgery, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Hoon Joo Yang
- Department of Oral and Maxillofacial Surgery, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Soon Jung Hwang
- Department of Oral and Maxillofacial Surgery, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea.
| | - Won-Jin Yi
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea.
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55
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Computed tomography-based virtual fracture reduction techniques in bimandibular fractures. J Craniomaxillofac Surg 2016; 44:177-85. [DOI: 10.1016/j.jcms.2015.11.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 10/15/2015] [Accepted: 11/23/2015] [Indexed: 11/22/2022] Open
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56
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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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57
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Katsumura S, Sato K, Ikawa T, Yamamura K, Ando E, Shigeta Y, Ogawa T. “High-precision, reconstructed 3D model” of skull scanned by conebeam CT: Reproducibility verified using CAD/CAM data. Leg Med (Tokyo) 2016; 18:37-43. [DOI: 10.1016/j.legalmed.2015.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 11/18/2015] [Accepted: 11/24/2015] [Indexed: 11/28/2022]
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58
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A new, highly precise measurement technology for the in vitro evaluation of the accuracy of digital imaging data. J Craniomaxillofac Surg 2015; 43:1335-9. [DOI: 10.1016/j.jcms.2015.06.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 05/24/2015] [Accepted: 06/17/2015] [Indexed: 12/31/2022] Open
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Yang WM, Ho CT, Lo LJ. Automatic Superimposition of Palatal Fiducial Markers for Accurate Integration of Digital Dental Model and Cone Beam Computed Tomography. J Oral Maxillofac Surg 2015; 73:1616.e1-10. [PMID: 25957873 DOI: 10.1016/j.joms.2015.04.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/22/2015] [Accepted: 04/06/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE Obtaining a detailed dentition image is important for 3-dimensional orthognathic surgical simulation. The purpose of the present study was to evaluate the accuracy of a method using automatic superimposition of intraoral fiducial markers for integrating the digital dental model with the cone beam computed tomography (CBCT) scan. PATIENTS AND METHODS A preliminary test was performed on a plastic skull model for the proper selection of the size and number of the fiducial markers fixed to the palatal plate. Five patients were enrolled in the present study. Plaster dental models were taken and scanned. Integration of the upper dental and occlusion dental image with the CBCT scan was performed by superimposition of the markers. The occlusion dental image was used to connect the lower dental image and the corresponding position of the CBCT mandibular dentition. The root mean square difference (RMSD) was used to evaluate the accuracy of fiducial marker superimposition, and the Euclidean distances were measured between 2 occlusion surfaces to evaluate the registration accuracy. RESULTS The RMSD was less than 0.13 mm in the superimposition of fiducial markers, and the Euclidean distance was less than 0.28 mm in the occlusal surface deviation. The results showed high accuracy on integration. The patients reported good tolerance to the markers. CONCLUSION This superimposition method provided high accuracy for the replacement of dentition using CBCT and was patient- and user-friendly for clinical application.
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Affiliation(s)
- Wei-Min Yang
- Attending Staff, Department of Dentistry, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Cheng-Ting Ho
- Assistant Professor, Department of Orthodontics, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Lun-Jou Lo
- Professor, Department of Plastic and Reconstructive Surgery, and Craniofacial Research Center, and Chairman, Department of Surgery, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan.
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60
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Uechi J, Tsuji Y, Konno M, Hayashi K, Shibata T, Nakayama E, Mizoguchi I. Generation of virtual models for planning orthognathic surgery using a modified multimodal image fusion technique. Int J Oral Maxillofac Surg 2015; 44:462-9. [DOI: 10.1016/j.ijom.2014.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 07/29/2014] [Accepted: 11/07/2014] [Indexed: 11/16/2022]
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61
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Nilsson J, Thor A, Kamer L. Development of workflow for recording virtual bite in the planning of orthognathic operations. Br J Oral Maxillofac Surg 2015; 53:384-6. [DOI: 10.1016/j.bjoms.2014.12.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 12/29/2014] [Indexed: 11/24/2022]
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62
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Lin HH, Lo LJ. Three-dimensional computer-assisted surgical simulation and intraoperative navigation in orthognathic surgery: a literature review. J Formos Med Assoc 2015; 114:300-7. [PMID: 25744942 DOI: 10.1016/j.jfma.2015.01.017] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 01/26/2015] [Accepted: 01/31/2015] [Indexed: 10/23/2022] Open
Abstract
By incorporating three-dimensional (3D) imaging and computer-aided design and manufacturing techniques, 3D computer-assisted technology has been applied widely to provide accurate guidance for assessment and treatment planning in clinical practice. This technology has recently been used in orthognathic surgery to improve surgical planning and outcome. The modality will gradually become popular. This study reviewed the literature concerning the use of computer-assisted techniques in orthognathic surgery including surgical planning, simulation, intraoperative translation of the virtual surgery, and postoperative evaluation. A Medline, PubMed, ProQuest, and ScienceDirect search was performed to find relevant articles with regard to 3D computer-assisted orthognathic surgery in the past 10 years. A total of 460 articles were revealed, out of which 174 were publications addressed the topic of this study. The purpose of this article is to present an overview of the state-of-art methods for 3D computer-assisted technology in orthognathic surgery. From the review we can conclude that the use of computer-assisted technique in orthognathic surgery provides the benefit of optimal functional and aesthetic results, patient satisfaction, precise translation of the treatment plan, and facilitating intraoperative manipulation.
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Affiliation(s)
- Hsiu-Hsia Lin
- Craniofacial Research Center, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Lun-Jou Lo
- Plastic and Reconstructive Surgery, and Craniofacial Research Center, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan.
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63
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Reyes A, Turkyilmaz I, Prihoda TJ. Accuracy of surgical guides made from conventional and a combination of digital scanning and rapid prototyping techniques. J Prosthet Dent 2015; 113:295-303. [PMID: 25681352 DOI: 10.1016/j.prosdent.2014.09.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 09/29/2014] [Accepted: 09/29/2014] [Indexed: 11/25/2022]
Abstract
STATEMENT OF PROBLEM Surgical guides aid in accurately placing dental implants to achieve a predictable restorative outcome. Which surgical guide fabrication technique results in the most accurately fitting surgical guide is unknown. PURPOSE The purpose of this investigation was to determine the internal fit of dental implant surgical guides on dentate and edentulous ridges by using implant surgical guides fabricated from conventional and computer-aided design/computer-aided manufacturing (CAD/CAM) techniques. MATERIAL AND METHODS Eighty surgical guides were fabricated from conventional and CAD/CAM techniques; half were designed from Kennedy Class 2 (K2) casts, and half were designed from Kennedy Class 3 (K3) casts. Conventional surgical guides were fabricated from acrylic resin. The CAD/CAM surgical guides were scanned by using cone beam computed tomography (CBCT) or an optical scan (OS). The guides were printed with stereolithography (SL) or 3-dimensional digital printing (3DP). All surgical guides were cemented to their respective design casts, sectioned, and measured at standardized locations. A 2-way ANOVA and the post hoc Fisher least square difference t test was performed (α=.05). RESULTS The 2-way ANOVA indicated that the difference between surgical guide groups and Kennedy class was statistically significant (P<.05) and the interaction between groups and Kennedy class was statistically significant (P<.05). The OS/3DP CAD/CAM guide was the best-fitting cast for the K2 cast group, and the conventional guide was the best-fitting guide for the K3 group. CONCLUSIONS Conventionally fabricated and OS surgical guides have greater accuracy of fit than CBCT scanned surgical guides.
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Affiliation(s)
- Ashley Reyes
- Resident, Graduate Prosthodontics, Department of Prosthodontics, Lackland Air Force Base San Antonio, Texas
| | - Ilser Turkyilmaz
- Assistant Professor, Department of Comprehensive Dentistry, The University of Texas Health Science Center at San Antonio, Texas.
| | - Thomas J Prihoda
- Professor, Department of Pathology, The University of Texas Health Science Center at San Antonio, Texas
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64
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Yan S, Shi SG, Niu ZY, Pei ZH, Shi SM, Mu C. Soft tissue image reconstruction using cone-beam computed tomography combined with laser scanning: a novel method to evaluate the masticatory mucosa. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 118:725-31. [DOI: 10.1016/j.oooo.2014.08.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 08/12/2014] [Accepted: 08/16/2014] [Indexed: 02/07/2023]
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65
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Lin X, Chen T, Liu J, Jiang T, Yu D, Shen SGF. Point-based superimposition of a digital dental model on to a three-dimensional computed tomographic skull: an accuracy study in vitro. Br J Oral Maxillofac Surg 2014; 53:28-33. [PMID: 25300890 DOI: 10.1016/j.bjoms.2014.09.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 09/10/2014] [Indexed: 11/18/2022]
Abstract
We investigated the accuracy of point-based superimposition of a digital dental model on to a 3-dimensional computed tomographic (CT) skull with intact dentition. The physical model was scanned by CT to give a virtual skull model, and a plaster dental model was taken and laser-scanned to give a digital dental model. Three different background investigators were recruited and calibrated to make the point-based superimposition, and afterwards were asked to repeat 5 superimpositions each. Five bone-to-tooth measurements for the maxilla and 6 for the mandible were selected to indicate the relation of teeth to skull. Repeated measures were made on the physical model to act as a control group, and on the virtual model to act as the test group. The absolute agreement intra-class correlation coefficient (ICC) was used to assess the intra/inter-investigator reliability; Bland-Altman analysis was used to calculate the general differences, limits of agreement, and precision ranges of the estimated limits. Inter/intra-investigator reliability was excellent with ICC varying from 0.986 to 1; Bland-Altman analysis indicated that general difference was 0.01 (0.25)mm, the upper limit of agreement was 0.50mm and the lower limit -0.47 mm, and the precision range for the upper limit was 0.43 mm to 0.57 mm and for the lower limit -0.54 mm to -0.40 mm. Clinically acceptable accuracy can be achieved using a direct point-based method to superimpose a digital dental model on to a 3-dimensional CT skull.
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Affiliation(s)
- X Lin
- Department of Stomatology, The Chinese PLA General Hospital Hainan Branch, Sanya, Hainan, China; Department of Oral & Maxillofacial Surgery, The Chinese PLA General Hospital Institution of Stomatology, Beijing, China; Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - T Chen
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - J Liu
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - T Jiang
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - D Yu
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - S G F Shen
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China.
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66
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Nabha W, Hong YM, Cho JH, Hwang HS. Assessment of metal artifacts in three-dimensional dental surface models derived by cone-beam computed tomography. Korean J Orthod 2014; 44:229-35. [PMID: 25309862 PMCID: PMC4192524 DOI: 10.4041/kjod.2014.44.5.229] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 03/17/2014] [Accepted: 03/18/2014] [Indexed: 11/18/2022] Open
Abstract
Objective The aim of this study was to assess artifacts induced by metallic restorations in three-dimensional (3D) dental surface models derived by cone-beam computed tomography (CBCT). Methods Fifteen specimens, each with four extracted human premolars and molars embedded in a plaster block, were scanned by CBCT before and after the cavitated second premolars were restored with dental amalgam. Five consecutive surface models of each specimen were created according to increasing restoration size: no restoration (control) and small occlusal, large occlusal, disto-occlusal, and mesio-occluso-distal restorations. After registering each restored model with the control model, maximum linear discrepancy, area, and intensity of the artifacts were measured and compared. Results Artifacts developed mostly on the buccal and lingual surfaces. They occurred not only on the second premolar but also on the first premolar and first molar. The parametric values increased significantly with increasing restoration size. Conclusions Metallic restorations induce considerable artifacts in 3D dental surface models. Artifact reduction should be taken into consideration for a proper diagnosis and treatment planning when using 3D surface model derived by CBCT in dentofacial deformity patients.
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Affiliation(s)
- Wael Nabha
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Young-Min Hong
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jin-Hyoung Cho
- Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Hyeon-Shik Hwang
- Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
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67
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Kang SH, Lee JW, Lim SH, Kim YH, Kim MK. Dental image replacement on cone beam computed tomography with three-dimensional optical scanning of a dental cast, occlusal bite, or bite tray impression. Int J Oral Maxillofac Surg 2014; 43:1293-301. [PMID: 25015906 DOI: 10.1016/j.ijom.2014.06.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 04/29/2014] [Accepted: 06/17/2014] [Indexed: 11/28/2022]
Abstract
The goal of the present study was to compare the accuracy of dental image replacement on a cone beam computed tomography (CBCT) image using digital image data from three-dimensional (3D) optical scanning of a dental cast, occlusal bite, and bite tray impression. A Bracket Typodont dental model was used. CBCT of the dental model was performed and the data were converted to stereolithography (STL) format. Three experimental materials, a dental cast, occlusal bite, and bite tray impression, were optically scanned in 3D. STL files converted from the CBCT of the Typodont model and the 3D optical-scanned STL files of the study materials were image-registered. The error range of each methodology was measured and compared with a 3D optical scan of the Typodont. For the three materials, the smallest error observed was 0.099±0.114mm (mean error±standard deviation) for registering the 3D optical scan image of the dental cast onto the CBCT dental image. Although producing a dental cast can be laborious, the study results indicate that it is the preferred method. In addition, an occlusal bite is recommended when bite impression materials are used.
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Affiliation(s)
- S-H Kang
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
| | - J-W Lee
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea
| | - S-H Lim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea
| | - Y-H Kim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea
| | - M-K Kim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea
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68
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Kim NK, Kim HY, Kim HJ, Cha IH, Nam W. Considerations and Protocols in Virtual Surgical Planning of Reconstructive Surgery for More Accurate and Esthetic Neomandible with Deep Circumflex Iliac Artery Free Flap. Maxillofac Plast Reconstr Surg 2014; 36:161-7. [PMID: 27489828 PMCID: PMC4281915 DOI: 10.14402/jkamprs.2014.36.4.161] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 07/24/2014] [Indexed: 11/17/2022] Open
Abstract
Purpose: The reconstruction of mandibular defects poses many difficulties due to the unique, complex shape of the mandible and the temporomandibular joints. With development of microvascular anastomosis, free tissue transplantation techniques, such as deep circumflex iliac artery (DCIA) flap and fibular free flap (FFF), were developed. The DCIA offers good quality and quantity of bone tissue for mandibular segmental defect and implant for dental rehabilitation. Virtual surgical planning (VSP) and stereolithography-guided osteotomy are currently successfully applied in three-dimensional mandibular reconstruction, but most use FFF. There are only a few articles on reconstruction with the DCIA that assess the postoperative results. Methods: Three patients admitted during a five month period (April of 2013 to August of 2013) underwent resection of mandible and DCIA musculo-osseous reconstruction using a VSP and stereolithographic modeling and assessment of outcomes included technical accuracy, esthetic contour, and functional outcomes. Results: This technique yielded iliac bone segment with excellent apposition and duplication of the preoperative plan. Flap survival was 100 percent and all patients maintained preoperative occlusion and contour. Conclusion: Based on our experience, we offer considerations and logically consistent protocols by classification of mandibular defects, and demonstrate the benefits in VSP and stereolithographic modeling of mandibular reconstructive surgery with DCIA flap.
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Affiliation(s)
- Nam-Kyoo Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University
| | - Hyun Young Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University
| | - Hyung Jun Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University; Oral Cancer Research Institute, College of Dentistry, Yonsei University
| | - In-Ho Cha
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University; Oral Cancer Research Institute, College of Dentistry, Yonsei University
| | - Woong Nam
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University; Oral Cancer Research Institute, College of Dentistry, Yonsei University
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69
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Ye N, Long H, Xue J, Wang S, Yang X, Lai W. Integration accuracy of laser-scanned dental models into maxillofacial cone beam computed tomography images of different voxel sizes with different segmentation threshold settings. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 117:780-6. [DOI: 10.1016/j.oooo.2014.02.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 02/05/2014] [Accepted: 02/19/2014] [Indexed: 11/25/2022]
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70
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Tooth model reconstruction based upon data fusion for orthodontic treatment simulation. Comput Biol Med 2014; 48:8-16. [DOI: 10.1016/j.compbiomed.2014.02.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 02/03/2014] [Accepted: 02/05/2014] [Indexed: 11/19/2022]
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71
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Hernández-Alfaro F, Guijarro-Martínez R. New protocol for three-dimensional surgical planning and CAD/CAM splint generation in orthognathic surgery: an in vitro and in vivo study. Int J Oral Maxillofac Surg 2013; 42:1547-56. [DOI: 10.1016/j.ijom.2013.03.025] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 02/10/2013] [Accepted: 03/20/2013] [Indexed: 10/26/2022]
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72
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Whyms BJ, Vorperian HK, Gentry LR, Schimek EM, Bersu ET, Chung MK. The effect of computed tomographic scanner parameters and 3-dimensional volume rendering techniques on the accuracy of linear, angular, and volumetric measurements of the mandible. Oral Surg Oral Med Oral Pathol Oral Radiol 2013; 115:682-91. [PMID: 23601224 DOI: 10.1016/j.oooo.2013.02.008] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 01/04/2013] [Accepted: 02/14/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVES This study investigates the effect of scanning parameters on the accuracy of measurements from three-dimensional (3D), multi-detector computed tomography (MDCT) mandible renderings. A broader range of acceptable parameters can increase the availability of computed tomographic (CT) studies for retrospective analysis. STUDY DESIGN Three human mandibles and a phantom object were scanned using 18 combinations of slice thickness, field of view (FOV), and reconstruction algorithm and 3 different threshold-based segmentations. Measurements of 3D computed tomography (3DCT) models and specimens were compared. RESULTS Linear and angular measurements were accurate, irrespective of scanner parameters or rendering technique. Volume measurements were accurate with a slice thickness of 1.25 mm, but not 2.5 mm. Surface area measurements were consistently inflated. CONCLUSIONS Linear, angular, and volumetric measurements of mandible 3D MDCT models can be confidently obtained from a range of parameters and rendering techniques. Slice thickness is the primary factor affecting volume measurements. These findings should also apply to 3D rendering using cone-beam CT (CBCT).
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Affiliation(s)
- Brian J Whyms
- Waisman Center, University of Wisconsin-Madison, Madison WI 53705, USA
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73
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Digital replacement of the distorted dentition acquired by cone beam computed tomography (CBCT): a pilot study. Int J Oral Maxillofac Surg 2013; 42:1488-93. [DOI: 10.1016/j.ijom.2013.01.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 12/07/2012] [Accepted: 01/10/2013] [Indexed: 11/20/2022]
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74
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Lin HH, Chiang WC, Lo LJ, Wang CH. A new method for the integration of digital dental models and cone-beam computed tomography images. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2013; 2013:2328-31. [PMID: 24110191 DOI: 10.1109/embc.2013.6610004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This study introduces a regional-surface-based registration without markers for integration of laser-scanned dental images into maxillofacial cone-beam computed tomography (CBCT) images. The method just needs to manually select three similar areas without artifact on the digital dental image and CBCT image, and then the process is automatically complete the fusion (superimposition) of maxillofacial model and the digital dental model. Then the differences such as mean error and root-mean-square (RMS) error are automatically computed between the 2 images according to the selected surfaces and expressed in a color scale. Experimental results show that the mean errors between the 2 models at the integrated model range from 0.15 mm to 0.45 mm and the RMS errors range 0.18 mm to 0.49 mm. The numbers are similar to the results of previous methods and reach a desirable error. Moreover, it is robust feasibility for especially serious artifacts CBT images. It is worth mentioning that all measurements of intra-operator reproducibility and inter-operator reliability are excellent.
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75
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Abdel-Moniem Barakat A, Abou-ElFetouh A, Hakam MM, El-Hawary H, Abdel-Ghany KM. Clinical and radiographic evaluation of a computer-generated guiding device in bilateral sagittal split osteotomies. J Craniomaxillofac Surg 2013; 42:e195-203. [PMID: 24099655 DOI: 10.1016/j.jcms.2013.08.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 06/25/2013] [Accepted: 08/28/2013] [Indexed: 10/26/2022] Open
Abstract
The bilateral sagittal split osteotomy (BSSO) is one of the main orthognathic surgery procedures used for managing skeletal mandibular excess, deficiency or asymmetry. It is known to be a technique-sensitive procedure with high reported incidences of inferior alveolar nerve injury, bad splits and post-surgical relapse. With the increasing use of computer-assisted techniques in orthognathic surgery, the accurate transfer of the virtual plan to the operating room is currently a subject of research. This study evaluated the efficacy of computer-generated device at maintaining the planned condylar position and minimizing inferior alveolar nerve injury during BSSO. The device was used in 6 patients who required isolated mandibular surgery for correction of their skeletal deformities. Clinical evaluation showed good recovery of the maximal incisal opening and a reproducible occlusion in 5 of the 6 patients. Radiographic evaluation showed better control of the condyle position in both the vertical and anteroposterior directions than in the mediolateral direction. The degree of accuracy between the planned and achieved screw positions were judged as good to excellent in all cases. Within the limitations of this study and the small sample size, the proposed device design allowed for good transfer of the virtual surgical plan to the operating room.
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Affiliation(s)
- Ahmed Abdel-Moniem Barakat
- Oral and Maxillofacial Surgery Department (Prof. Ragia Mounir), Faculty of Oral & Dental Medicine, Cairo University, 11 El-Saraya Street, El-Manial, 11451 Cairo, Egypt
| | - Adel Abou-ElFetouh
- Oral and Maxillofacial Surgery Department (Prof. Ragia Mounir), Faculty of Oral & Dental Medicine, Cairo University, 11 El-Saraya Street, El-Manial, 11451 Cairo, Egypt.
| | - Maha Mohammed Hakam
- Oral and Maxillofacial Surgery Department (Prof. Ragia Mounir), Faculty of Oral & Dental Medicine, Cairo University, 11 El-Saraya Street, El-Manial, 11451 Cairo, Egypt
| | - Hesham El-Hawary
- Oral and Maxillofacial Surgery Department (Prof. Ragia Mounir), Faculty of Oral & Dental Medicine, Cairo University, 11 El-Saraya Street, El-Manial, 11451 Cairo, Egypt
| | - Khaled Mahmoud Abdel-Ghany
- Central Metallurgical Research and Development Institute (Dr. Khaled Abdel-Ghany), El-Tebbeen, Helwan, 11421 Cairo, Egypt
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76
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Ayoub AF, Khambay B. A paradigm shift in the diagnosis & management of dentofacial deformities. Saudi Dent J 2013; 24:121-5. [PMID: 23960540 DOI: 10.1016/j.sdentj.2012.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Ashraf F Ayoub
- Professor of Oral & Maxillofacial Surgery, The University of Glasgow, UK Head of Biotechnology, and Craniofacial Sciences Research Section, Director of postgraduate programme in Oral, and Maxillofacial Surgery, Glasgow University Dental School, 378 Sauchiehall Street, Glasgow G2 3JZ, UK
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Lin HH, Chiang WC, Lo LJ, Sheng-Pin Hsu S, Wang CH, Wan SY. Artifact-resistant superimposition of digital dental models and cone-beam computed tomography images. J Oral Maxillofac Surg 2013; 71:1933-47. [PMID: 23911142 DOI: 10.1016/j.joms.2013.06.199] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 06/10/2013] [Accepted: 06/11/2013] [Indexed: 11/16/2022]
Abstract
PURPOSE Combining the maxillofacial cone-beam computed tomography (CBCT) model with its corresponding digital dental model enables an integrated 3-dimensional (3D) representation of skeletal structures, teeth, and occlusions. Undesired artifacts, however, introduce difficulties in the superimposition of both models. We have proposed an artifact-resistant surface-based registration method that is robust and clinically applicable and that does not require markers. MATERIALS AND METHODS A CBCT bone model and a laser-scanned dental model obtained from the same patient were used in developing the method and examining the accuracy of the superimposition. Our method included 4 phases. The first phase was to segment the maxilla from the mandible in the CBCT model. The second phase was to conduct an initial registration to bring the digital dental model and the maxilla and mandible sufficiently close to each other. Third, we manually selected at least 3 corresponding regions on both models by smearing patches on the 3D surfaces. The last phase was to superimpose the digital dental model into the maxillofacial model. Each superimposition process was performed twice by 2 operators with the same object to investigate the intra- and interoperator differences. All collected objects were divided into 3 groups with various degrees of artifacts: artifact-free, critical artifacts, and severe artifacts. The mean errors and root-mean-square (RMS) errors were used to evaluate the accuracy of the superimposition results. Repeated measures analysis of variance and the Wilcoxon rank sum test were used to calculate the intraoperator reproducibility and interoperator reliability. RESULTS Twenty-four maxilla and mandible objects for evaluation were obtained from 14 patients. The experimental results showed that the mean errors between the 2 original models in the residing fused model ranged from 0.10 to 0.43 mm and that the RMS errors ranged from 0.13 to 0.53 mm. These data were consistent with previously used methods and were clinically acceptable. All measurements of the proposed study exhibited desirable intraoperator reproducibility and interoperator reliability. Regarding the intra- and interoperator mean errors and RMS errors in the nonartifact or critical artifact group, no significant difference between the repeated trials or between operators (P < .05) was observed. CONCLUSIONS The results of the present study have shown that the proposed regional surface-based registration can robustly and accurately superimpose a digital dental model into its corresponding CBCT model.
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Affiliation(s)
- Hsiu-Hsia Lin
- Assistant Research Fellow, Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou Chang Gung University, Taoyuan, Taiwan, Republic of China
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78
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Impact of the number of registration points for replacement of three-dimensional computed tomography images in dental areas using three-dimensional light-scanned images of dental models. Oral Radiol 2013. [DOI: 10.1007/s11282-013-0136-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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79
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Rangel FA, Maal TJJ, Bronkhorst EM, Breuning KH, Schols JGJH, Bergé SJ, Kuijpers-Jagtman AM. Accuracy and reliability of a novel method for fusion of digital dental casts and Cone Beam Computed Tomography scans. PLoS One 2013; 8:e59130. [PMID: 23527111 PMCID: PMC3604103 DOI: 10.1371/journal.pone.0059130] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Accepted: 02/11/2013] [Indexed: 11/18/2022] Open
Abstract
Several methods have been proposed to integrate digital models into Cone Beam Computed Tomography scans. Since all these methods have some drawbacks such as radiation exposure, soft tissue deformation and time-consuming digital handling processes, we propose a new method to integrate digital dental casts into Cone Beam Computed Tomography scans. Plaster casts of 10 patients were randomly selected and 5 titanium markers were glued to the upper and lower plaster cast. The plaster models were scanned, impressions were taken from the plaster models and the impressions were also scanned. Linear measurements were performed on all three models, to assess accuracy and reproducibility. Besides that, matching of the scanned plaster models and scanned impressions was done, to assess the accuracy of the matching procedure. Results show that all measurement errors are smaller than 0.2 mm, and that 81% is smaller than 0.1 mm. Matching of the scanned plaster casts and scanned impressions show a mean error between the two surfaces of the upper arch of 0.14 mm and for the lower arch of 0.18 mm. The time needed for reconstructing the CBCT scans to a digital patient, where the impressions are integrated into the CBCT scan of the patient takes about 15 minutes, with little variance between patients. In conclusion, we can state that this new method is a reliable method to integrate digital dental casts into CBCT scans. As far as radiation exposure, soft tissue deformation and digital handling processes are concerned, it is a significant improvement compared to the previously published methods.
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Affiliation(s)
- Frits A. Rangel
- Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- 3D Facial Imaging Research Group Nijmegen–Bruges, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Thomas J. J. Maal
- 3D Facial Imaging Research Group Nijmegen–Bruges, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- Department of Oral and Craniomaxillofacial Surgery, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Ewald M. Bronkhorst
- Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - K. Hero Breuning
- Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- 3D Facial Imaging Research Group Nijmegen–Bruges, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Jan G. J. H. Schols
- Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- 3D Facial Imaging Research Group Nijmegen–Bruges, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Stefaan J. Bergé
- 3D Facial Imaging Research Group Nijmegen–Bruges, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- Department of Oral and Craniomaxillofacial Surgery, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Anne Marie Kuijpers-Jagtman
- Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- 3D Facial Imaging Research Group Nijmegen–Bruges, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- * E-mail:
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80
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Creation of 3D multi-body orthodontic models by using independent imaging sensors. SENSORS 2013; 13:2033-50. [PMID: 23385416 PMCID: PMC3649418 DOI: 10.3390/s130202033] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Revised: 01/22/2013] [Accepted: 02/01/2013] [Indexed: 01/01/2023]
Abstract
In the field of dental health care, plaster models combined with 2D radiographs are widely used in clinical practice for orthodontic diagnoses. However, complex malocclusions can be better analyzed by exploiting 3D digital dental models, which allow virtual simulations and treatment planning processes. In this paper, dental data captured by independent imaging sensors are fused to create multi-body orthodontic models composed of teeth, oral soft tissues and alveolar bone structures. The methodology is based on integrating Cone-Beam Computed Tomography (CBCT) and surface structured light scanning. The optical scanner is used to reconstruct tooth crowns and soft tissues (visible surfaces) through the digitalization of both patients' mouth impressions and plaster casts. These data are also used to guide the segmentation of internal dental tissues by processing CBCT data sets. The 3D individual dental tissues obtained by the optical scanner and the CBCT sensor are fused within multi-body orthodontic models without human supervisions to identify target anatomical structures. The final multi-body models represent valuable virtual platforms to clinical diagnostic and treatment planning.
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81
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Barone S, Paoli A, Razionale AV. Computer-aided modelling of three-dimensional maxillofacial tissues through multi-modal imaging. Proc Inst Mech Eng H 2012; 227:89-104. [DOI: 10.1177/0954411912463869] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Recent developments in digital imaging techniques have allowed a wide spread of three-dimensional methodologies based on capturing anatomical tissues by different approaches, such as cone-beam computed tomography, three-dimensional photography and surface scanning. In oral rehabilitation, an objective method to predict surgical and orthodontic outcomes should be based on anatomical data belonging to soft facial tissue, facial skeleton and dentition (maxillofacial triad). However, none of the available imaging techniques can accurately capture the complete triad. This article presents a multi-modal framework, which allows image fusion of different digital techniques to create a three-dimensional virtual maxillofacial model, which integrates photorealistic face, facial skeleton and dentition. The methodology is based on combining structured light surface scanning and cone-beam computed tomography data processing. The fusion procedure provides multi-modal representations by aligning different tissues on the basis of common anatomical constraints.
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Affiliation(s)
- Sandro Barone
- Department of Mechanical, Nuclear and Production Engineering, University of Pisa, Pisa, Italy
| | - Alessandro Paoli
- Department of Mechanical, Nuclear and Production Engineering, University of Pisa, Pisa, Italy
| | - Armando V Razionale
- Department of Mechanical, Nuclear and Production Engineering, University of Pisa, Pisa, Italy
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82
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Rino Neto J, Silva FPLD, Chilvarquer I, Paiva JBD, Hernandez AM. Hausdorff Distance evaluation of orthodontic accessories' streaking artifacts in 3D model superimposition. Braz Oral Res 2012; 26:450-6. [PMID: 23018231 DOI: 10.1590/s1806-83242012000500012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 07/01/2012] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to determine whether image artifacts caused by orthodontic metal accessories interfere with the accuracy of 3D CBCT model superimposition. A human dry skull was subjected three times to a CBCT scan: at first without orthodontic brackets (T1), then with stainless steel brackets bonded without (T2) and with orthodontic arch wires (T3) inserted into the brackets' slots. The registration of image surfaces and the superimposition of 3D models were performed. Within-subject surface distances between T1-T2, T1-T3 and T2-T3 were computed and calculated for comparison among the three data sets. The minimum and maximum Hausdorff Distance units (HDu) computed between the corresponding data points of the T1 and T2 CBCT 3D surface images were 0.000000 and 0.049280 HDu, respectively, and the mean distance was 0.002497 HDu. The minimum and maximum Hausdorff Distances between T1 and T3 were 0.000000 and 0.047440 HDu, respectively, with a mean distance of 0.002585 HDu. In the comparison between T2 and T3, the minimum, maximum and mean Hausdorff Distances were 0.000000, 0.025616 and 0.000347 HDu, respectively. In the current study, the image artifacts caused by metal orthodontic accessories did not compromise the accuracy of the 3D model superimposition. Color-coded maps of overlaid structures complemented the computed Hausdorff Distances and demonstrated a precise fusion between the data sets.
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Affiliation(s)
- José Rino Neto
- Department of Orthodontics, School of Dentistry, Univ of São Paulo, Brazil
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83
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Rangel FA, Maal TJJ, Bergé SJ, Kuijpers-Jagtman AM. Integration of digital dental casts in cone-beam computed tomography scans. ISRN DENTISTRY 2012; 2012:949086. [PMID: 23050159 PMCID: PMC3461639 DOI: 10.5402/2012/949086] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Accepted: 08/30/2012] [Indexed: 12/03/2022]
Abstract
Cone-beam computed tomography (CBCT) is widely used in maxillofacial surgery. The CBCT image of the dental arches, however, is of insufficient quality to use in digital planning of orthognathic surgery. Several authors have described methods to integrate digital dental casts into CBCT scans, but all reported methods have drawbacks. The aim of this feasibility study is to present a new simplified method to integrate digital dental casts into CBCT scans. In a patient scheduled for orthognathic surgery, titanium markers were glued to the gingiva. Next, a CBCT scan and dental impressions were made. During the impression-taking procedure, the titanium markers were transferred to the impression. The impressions were scanned, and all CBCT datasets were exported in DICOM format. The two datasets were matched, and the dentition derived from the scanned impressions was transferred to the CBCT of the patient. After matching the two datasets, the average distance between the corresponding markers was 0.1 mm. This novel method allows for the integration of digital dental casts into CBCT scans, overcoming problems such as unwanted extra radiation exposure, distortion of soft tissues due to the use of bite jigs, and time-consuming digital data handling.
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Affiliation(s)
- Frits A Rangel
- Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, 309 Dentistry, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
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84
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Park TJ, Lee SH, Lee KS. A method for mandibular dental arch superimposition using 3D cone beam CT and orthodontic 3D digital model. Korean J Orthod 2012; 42:169-81. [PMID: 23112948 PMCID: PMC3481990 DOI: 10.4041/kjod.2012.42.4.169] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Revised: 06/05/2012] [Accepted: 06/07/2012] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE The purpose of this study was to develop superimposition method on the lower arch using 3-dimensional (3D) cone beam computed tomography (CBCT) images and orthodontic 3D digital modeling. METHODS Integrated 3D CBCT images were acquired by substituting the dental portion of 3D CBCT images with precise dental images of an orthodontic 3D digital model. Images were acquired before and after treatment. For the superimposition, 2 superimposition methods were designed. Surface superimposition was based on the basal bone structure of the mandible by surface-to-surface matching (best-fit method). Plane superimposition was based on anatomical structures (mental and lingual foramen). For the evaluation, 10 landmarks including teeth and anatomic structures were assigned, and 30 times of superimpositions and measurements were performed to determine the more reproducible and reliable method. RESULTS All landmarks demonstrated that the surface superimposition method produced relatively more consistent coordinate values. The mean distances of measured landmarks values from the means were statistically significantly lower with the surface superimpositions method. CONCLUSIONS Between the 2 superimposition methods designed for the evaluation of 3D changes in the lower arch, surface superimposition was the simpler, more reproducible, reliable method.
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Affiliation(s)
- Tae-Joon Park
- Department of Orthodontics, Graduate School, Kyung Hee University School of Dentistry, Seoul, Korea
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85
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Registration accuracy in the integration of laser-scanned dental images into maxillofacial cone-beam computed tomography images. Am J Orthod Dentofacial Orthop 2011; 140:585-91. [DOI: 10.1016/j.ajodo.2011.04.018] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 04/01/2011] [Accepted: 04/01/2011] [Indexed: 11/24/2022]
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86
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Ritter L, Reiz SD, Rothamel D, Dreiseidler T, Karapetian V, Scheer M, Zöller JE. Registration accuracy of three-dimensional surface and cone beam computed tomography data for virtual implant planning. Clin Oral Implants Res 2011; 23:447-52. [PMID: 21488966 DOI: 10.1111/j.1600-0501.2011.02159.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Virtual wax-ups based on three-dimensional (3D) surface models can be matched (i.e. registered) to cone beam computed tomography (CBCT) data of the same patient for dental implant planning. Thereby, implant planning software can visualize anatomical and prosthetic information simultaneously. The aim of this study is to assess the accuracy of a newly developed registration process. MATERIAL AND METHODS Data pairs of CBCT and 3D surface data of 16 patients for dental implant planning were registered and the discrepancy between the visualized 3D surface data and the corresponding CBCT data were measured on 64 teeth at seven points by two investigators in two iterations with a total of 1792 measurements. RESULTS All data pairs were matched successfully and mean distances between CBCT and 3D surface data were between 0.03(±0.33) and 0.14(±0.18) mm. At two of seven measuring points, statistically significant correlations were determined between the measured error and the presence and type of restorations. Registration errors in maxilla and mandible were not statistically significantly different. CONCLUSION According to the results of this study, registration of 3D surface data and CBCT data works reliably and is sufficiently accurate for dental implant planning. Thereby, barium-sulfate scanning templates can be avoided and dental implant planning can be accomplished fully virtual.
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Affiliation(s)
- L Ritter
- Department for Craniomaxillofacial and Plastic Surgery, University Hospital of Cologne, Cologne, Germany.
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87
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Plooij JM, Maal TJJ, Haers P, Borstlap WA, Kuijpers-Jagtman AM, Bergé SJ. Digital three-dimensional image fusion processes for planning and evaluating orthodontics and orthognathic surgery. A systematic review. Int J Oral Maxillofac Surg 2010; 40:341-52. [PMID: 21095103 DOI: 10.1016/j.ijom.2010.10.013] [Citation(s) in RCA: 178] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2009] [Revised: 05/30/2010] [Accepted: 10/13/2010] [Indexed: 10/18/2022]
Abstract
The three important tissue groups in orthognathic surgery (facial soft tissues, facial skeleton and dentition) can be referred to as a triad. This triad plays a decisive role in planning orthognathic surgery. Technological developments have led to the development of different three-dimensional (3D) technologies such as multiplanar CT and MRI scanning, 3D photography modalities and surface scanning. An objective method to predict surgical and orthodontic outcome should be established based on the integration of structural (soft tissue envelope, facial skeleton and dentition) and photographic 3D images. None of the craniofacial imaging techniques can capture the complete triad with optimal quality. This can only be achieved by 'image fusion' of different imaging techniques to create a 3D virtual head that can display all triad elements. A systematic search of current literature on image fusion in the craniofacial area was performed. 15 articles were found describing 3D digital image fusion models of two or more different imaging techniques for orthodontics and orthognathic surgery. From these articles it is concluded, that image fusion and especially the 3D virtual head are accurate and realistic tools for documentation, analysis, treatment planning and long term follow up. This may provide an accurate and realistic prediction model.
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Kim BC, Lee CE, Park W, Kang SH, Zhengguo P, Yi CK, Lee SH. Integration accuracy of digital dental models and 3-dimensional computerized tomography images by sequential point- and surface-based markerless registration. ACTA ACUST UNITED AC 2010; 110:370-8. [DOI: 10.1016/j.tripleo.2010.03.036] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 03/22/2010] [Accepted: 03/23/2010] [Indexed: 11/29/2022]
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89
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Kang SH, Kim MK, Park WS, Lee SH. Accurate computerised mandibular simulation in orthognathic surgery: a new method for integrating the planned postoperative occlusion model. Br J Oral Maxillofac Surg 2010; 48:305-7. [PMID: 19616350 DOI: 10.1016/j.bjoms.2009.06.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/08/2009] [Indexed: 11/30/2022]
Affiliation(s)
- Sang-Hoon Kang
- Department of Oral and Maxillofacial Surgery, National Health Insurance Corporation Ilsan Hospital, 1232, Baekseok-dong, Ilsan-donggu, Goyang-si, Gyeonggi-do, 410-719, Republic of Korea.
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90
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Virtual occlusion in planning orthognathic surgical procedures. Int J Oral Maxillofac Surg 2010; 39:457-62. [PMID: 20226628 DOI: 10.1016/j.ijom.2010.02.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2008] [Revised: 08/03/2009] [Accepted: 02/01/2010] [Indexed: 11/20/2022]
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AL-RAWI B, HASSAN B, VANDENBERGE B, JACOBS R. Accuracy assessment of three-dimensional surface reconstructions of teeth from Cone Beam Computed Tomography scans. J Oral Rehabil 2010; 37:352-8. [DOI: 10.1111/j.1365-2842.2010.02065.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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92
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Song HK, Son WS, Park SB, Kim SS, Kim YI. The assessment of dentoalveolar compensation in facial asymmetry individuals: integration of cone beam CT and laser scanned dental cast images. ACTA ACUST UNITED AC 2010. [DOI: 10.4041/kjod.2010.40.6.373] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hyo-Kyung Song
- Resident, Department of Orthodontics, School of Dentistry, Pusan National University, Korea
| | - Woo-Sung Son
- Professor, Department of Orthodontics, School of Dentistry, Pusan National University, Korea
| | - Soo-Byung Park
- Professor, Department of Orthodontics, School of Dentistry, Pusan National University, Korea
| | - Seong-Sik Kim
- Associate Professor, Department of Orthodontics, School of Dentistry, Pusan National University, Korea
| | - Yong-Il Kim
- Clinical Assistant Professor, Department of Orthodontics, School of Dentistry, Pusan National University, Korea
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93
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Hassan B, Couto Souza P, Jacobs R, de Azambuja Berti S, van der Stelt P. Influence of scanning and reconstruction parameters on quality of three-dimensional surface models of the dental arches from cone beam computed tomography. Clin Oral Investig 2009; 14:303-10. [PMID: 19506922 PMCID: PMC2868994 DOI: 10.1007/s00784-009-0291-3] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Accepted: 05/18/2009] [Indexed: 11/25/2022]
Abstract
The study aim is to investigate the influence of scan field, mouth opening, voxel size, and segmentation threshold selections on the quality of the three-dimensional (3D) surface models of the dental arches from cone beam computed tomography (CBCT). 3D models of 25 patients scanned with one image intensifier CBCT system (NewTom 3G, QR SLR, Verona, Italy) using three field sizes in open- and closed-mouth positions were created at different voxel size resolutions. Two observers assessed the quality of the models independently on a five-point scale using specified criteria. The results indicate that large-field selection reduced the visibility of the teeth and the interproximal space. Also, large voxel size reduced the visibility of the occlusal surfaces and bone in the anterior region in both maxilla and mandible. Segmentation threshold was more variable in the maxilla than in the mandible. Closed-mouth scan complicated separating the jaws and reduced teeth surfaces visibility. The preliminary results from this image-intensifier system indicate that the use of medium or small scan fields in an open-mouth position with a small voxel is recommended to optimize quality of the 3D surface model reconstructions of the dental arches from CBCT. More research is needed to validate the results with other flat-panel detector-based CBCT systems.
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Affiliation(s)
- Bassam Hassan
- Department of Oral Radiology, Academic Centre for Dentistry Amsterdam, Louwesweg 1, 1066EA Amsterdam, The Netherlands.
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94
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Swennen G, Mommaerts M, Abeloos J, De Clercq C, Lamoral P, Neyt N, Casselman J, Schutyser F. A cone-beam CT based technique to augment the 3D virtual skull model with a detailed dental surface. Int J Oral Maxillofac Surg 2009; 38:48-57. [PMID: 19118978 DOI: 10.1016/j.ijom.2008.11.006] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2007] [Revised: 07/30/2008] [Accepted: 11/03/2008] [Indexed: 11/26/2022]
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95
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Nkenke E, Vairaktaris E, Kramer M, Schlegel A, Holst A, Hirschfelder U, Wiltfang J, Neukam FW, Stamminger M. Three-dimensional analysis of changes of the malar-midfacial region after LeFort I osteotomy and maxillary advancement. Oral Maxillofac Surg 2008; 12:5-12. [PMID: 18600355 DOI: 10.1007/s10006-008-0094-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
AIM It has been the objective of the present prospective study to assess visible volume changes of the facial soft tissue after LeFort I osteotomy with advancement and to determine the soft-tissue-to-hard-tissue ratios of advancement. PATIENTS AND METHODS Twenty adult patients (ten female, ten male, mean age 33.9 +/- 14.9 years) received a LeFort I osteotomy with advancement because of a maxillary protrusion. Lateral skull radiographs and optical three-dimensional (3D) scans of the facial surface were assessed preoperatively and 12 months after surgery. The lateral skull radiographs were used to carry out standard linear and angular cephalometric measurements. The pre- and postoperative optical 3D surface scans were registered. A well-defined area in the malar region was used to determine the visible volume changes for each side separately. The mean accommodation vector that transforms the preoperative into the postoperative surface was assessed for each facial half separately. The soft-tissue-to-hard-tissue ratios between the incision superius and the labrale superius, the maximal parasagittal advancement of soft tissue, and the accommodation vectors were calculated. RESULTS A mean advancement of the incision superius of 5.3 +/- 2.1 mm was accompanied by a volume increase of 5.2 +/- 4.1 cm(3) in the right malar-midfacial region and 4.6 +/- 4.7 cm(3) on the left side, respectively, revealing a symmetrical volume change (p = 0.370). The soft-tissue-to-hard-tissue ratios were 80 +/- 94% for labrale superius and incision superius, 56 +/- 79% (right) and 51 +/- 56% (left) for accommodation vector and incision superius and 97 +/- 79% (right) and 98 +/- 89% (left) for maximal parasagittal advancement of soft tissue and incision superius. DISCUSSION The determination of volume changes and accompanying accommodation vectors complete the cephalometric analysis during the follow-up of patients undergoing LeFort I osteotomy. The data show that maxillary advancement leads to a more pronounced shifting of the soft tissues in the malar-midfacial area than of the upper lip. The new parameters will help to assess normative soft tissue data based on 3D imaging with a view to an improved three-dimensional prediction of the operative outcome of orthognathic surgery away from the midline.
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Affiliation(s)
- Emeka Nkenke
- Department of Oral and Maxillofacial Surgery, University of Erlangen-Nuremberg, Glueckstr. 11, 91054 Erlangen, Germany.
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96
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97
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Chapuis J, Schramm A, Pappas I, Hallermann W, Schwenzer-Zimmerer K, Langlotz F, Caversaccio M. A new system for computer-aided preoperative planning and intraoperative navigation during corrective jaw surgery. ACTA ACUST UNITED AC 2007; 11:274-87. [PMID: 17521077 DOI: 10.1109/titb.2006.884372] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A new system for computer-aided corrective surgery of the jaws has been developed and introduced clinically. It combines three-dimensional (3-D) surgical planning with conventional dental occlusion planning. The developed software allows simulating the surgical correction on virtual 3-D models of the facial skeleton generated from computed tomography (CT) scans. Surgery planning and simulation include dynamic cephalometry, semi-automatic mirroring, interactive cutting of bone and segment repositioning. By coupling the software with a tracking system and with the help of a special registration procedure, we are able to acquire dental occlusion plans from plaster model mounts. Upon completion of the surgical plan, the setup is used to manufacture positioning splints for intraoperative guidance. The system provides further intraoperative assistance with the help of a display showing jaw positions and 3-D positioning guides updated in real time during the surgical procedure. The proposed approach offers the advantages of 3-D visualization and tracking technology without sacrificing long-proven cast-based techniques for dental occlusion evaluation. The system has been applied on one patient. Throughout this procedure, we have experienced improved assessment of pathology, increased precision, and augmented control.
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Affiliation(s)
- Jonas Chapuis
- MEM Research Center, Institute for Surgical Technology and Biomechanics, University of Berne, 3014 Berne, Switzerland.
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98
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Nkenke E, Eitner S, Radespiel-Tröger M, Vairaktaris E, Neukam FW, Fenner M. Patient-centred outcomes comparing transmucosal implant placement with an open approach in the maxilla: a prospective, non-randomized pilot study. Clin Oral Implants Res 2007; 18:197-203. [PMID: 17348884 DOI: 10.1111/j.1600-0501.2006.01335.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It was the aim of the study to assess differences in patient morbidity between transmucosal implant placement and implant installation after elevation of mucoperiosteal flaps. In five of the patients, implants were placed in the maxilla transmucosally using a CAD/CAM surgical template [test group (TG)]. In the remaining five patients, the implants were installed after the elevation of mucoperiosteal flaps [control group (CG)]. Directly after surgery, at days 1 and 7 after surgery the patients rated pain and discomfort on a visual analogue scale (0=minimal pain and discomfort, 100=maximal pain and discomfort). Optical three-dimensional images were assessed preoperatively and at days 1 and 7 after surgery to determine the visible soft tissue swelling of the upper lip and cheeks. Directly postoperatively, the mean pairwise difference between both groups in view of pain and discomfort ratings (control minus test) was 45.6 (SD, 20.7). At days 1 and 7, the mean differences were 51.6 (SD, 21.8) and 19 (SD, 8), respectively. The overall test of the area under curve (AUC) against the null hypothesis 'AUC of pairwise differences of pain score over study time equals null' yielded a significant difference (P=0.01). The mean pairwise difference between both groups in view of soft tissue volume increase was 6.1 (SD, 2) cm(3) at day 1 after surgery and 4.6 (SD, 1.2) cm(3) at day 7. The overall test of the AUC against the null hypothesis 'AUC of pairwise differences of oedema measurements over study time equals null' yielded a significant difference (P=0.002). Within the limitations of this pilot study, it could be shown that transmucosal implant placement reduces patient morbidity significantly compared with an open approach.
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Affiliation(s)
- Emeka Nkenke
- Department of Oral and Maxillofacial Surgery, University of Erlangen-Nuremberg, Erlangen, Germany.
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99
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Swennen GRJ, Mommaerts MY, Abeloos J, De Clercq C, Lamoral P, Neyt N, Casselman J, Schutyser F. The Use of a Wax Bite Wafer and a Double Computed Tomography Scan Procedure to Obtain a Three-Dimensional Augmented Virtual Skull Model. J Craniofac Surg 2007; 18:533-9. [PMID: 17538314 DOI: 10.1097/scs.0b013e31805343df] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
A detailed visualization of the interocclusal relationship is essential in a three-dimensional virtual planning setup for orthognathic and facial orthomorphic surgery. The purpose of this study was to introduce and evaluate the use of a wax bite wafer in combination with a double computed tomography (CT) scan procedure to augment the three-dimensional virtual model of the skull with a detailed dental surface. A total of 10 orthognathic patients were scanned after a standardized multislice CT scanning protocol with dose reduction with their wax bite wafer in place. Afterward, the impressions of the upper and lower arches and the wax bite wafer were scanned for each patient separately using a high-resolution standardized multislice CT scanning protocol. Accurate fitting of the virtual impressions on the wax bite wafer was done with surface matching using iterative closest points. Consecutively, automatic rigid point-based registration of the wax bite wafer on the patient scan was performed to implement the digital virtual dental arches into the patient's skull model (Maxilim, version 2.0; Medicim NV, St-Niklaas, Belgium). Probability error histograms showed errors of < or =0.16 mm (25% percentile), < or =0.31 mm (50% percentile), and < or =0.92 (90% percentile) for iterative closest point surface matching. The mean registration error for automatic point-based registration was 0.17 +/- 0.07 mm (range, 0.12-0.22 mm). The combination of the wax bite wafer with the double CT scan procedure allowed for the setup of an accurate three-dimensional virtual augmented model of the skull with detailed dental surface. However, from a clinical workload, data handling, and computational point of view, this method is too time-consuming to be introduced in the clinical routine.
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Affiliation(s)
- Gwen R J Swennen
- Division of Maxillo-Facial Surgery, Department of Surgery, General Hospital St-Jan Bruges, Ruddershove, Bruges, Belgium.
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100
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Ayoub A, Xiao Y, Khambay B, Siebert J, Hadley D. Towards building a photo-realistic virtual human face for craniomaxillofacial diagnosis and treatment planning. Int J Oral Maxillofac Surg 2007; 36:423-8. [DOI: 10.1016/j.ijom.2007.02.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Revised: 12/15/2006] [Accepted: 02/01/2007] [Indexed: 10/23/2022]
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