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Cevidanes LHS, Ruellas ACO, Jomier J, Nguyen T, Pieper S, Budin F, Styner M, Paniagua B. Incorporating 3-dimensional models in online articles. Am J Orthod Dentofacial Orthop 2015; 147:S195-204. [PMID: 25925649 PMCID: PMC4418234 DOI: 10.1016/j.ajodo.2015.02.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 02/01/2015] [Accepted: 02/01/2015] [Indexed: 11/27/2022]
Abstract
INTRODUCTION The aims of this article are to introduce the capability to view and interact with 3-dimensional (3D) surface models in online publications, and to describe how to prepare surface models for such online 3D visualizations. METHODS Three-dimensional image analysis methods include image acquisition, construction of surface models, registration in a common coordinate system, visualization of overlays, and quantification of changes. Cone-beam computed tomography scans were acquired as volumetric images that can be visualized as 3D projected images or used to construct polygonal meshes or surfaces of specific anatomic structures of interest. The anatomic structures of interest in the scans can be labeled with color (3D volumetric label maps), and then the scans are registered in a common coordinate system using a target region as the reference. The registered 3D volumetric label maps can be saved in .obj, .ply, .stl, or .vtk file formats and used for overlays, quantification of differences in each of the 3 planes of space, or color-coded graphic displays of 3D surface distances. RESULTS All registered 3D surface models in this study were saved in .vtk file format and loaded in the Elsevier 3D viewer. In this study, we describe possible ways to visualize the surface models constructed from cone-beam computed tomography images using 2D and 3D figures. The 3D surface models are available in the article's online version for viewing and downloading using the reader's software of choice. These 3D graphic displays are represented in the print version as 2D snapshots. Overlays and color-coded distance maps can be displayed using the reader's software of choice, allowing graphic assessment of the location and direction of changes or morphologic differences relative to the structure of reference. The interpretation of 3D overlays and quantitative color-coded maps requires basic knowledge of 3D image analysis. CONCLUSIONS When submitting manuscripts, authors can now upload 3D models that will allow readers to interact with or download them. Such interaction with 3D models in online articles now will give readers and authors better understanding and visualization of the results.
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Affiliation(s)
- Lucia H S Cevidanes
- Assistant professor, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Mich.
| | - Antonio C O Ruellas
- Associate professor, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; CNPq Researcher and postdoctoral fellow, School of Dentistry, University of Michigan, Ann Arbor, Mich
| | | | - Tung Nguyen
- Assistant professor, Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC
| | | | - Francois Budin
- Software engineer, Neuro Image Research and Analysis Laboratory, Department of Psychiatry, University of North Carolina, Chapel Hill, NC
| | - Martin Styner
- Associate professor, Neuro Image Research and Analysis Laboratory, Department of Psychiatry, University of North Carolina, Chapel Hill, NC
| | - Beatriz Paniagua
- Assistant professor, Neuro Image Research and Analysis Laboratory, Department of Psychiatry, University of North Carolina, Chapel Hill, NC
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Weissheimer A, Menezes LM, Koerich L, Pham J, Cevidanes LHS. Fast three-dimensional superimposition of cone beam computed tomography for orthopaedics and orthognathic surgery evaluation. Int J Oral Maxillofac Surg 2015; 44:1188-96. [PMID: 25935632 DOI: 10.1016/j.ijom.2015.04.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 02/18/2015] [Accepted: 04/06/2015] [Indexed: 11/16/2022]
Abstract
The aim of this study was to validate a method for fast three-dimensional (3D) superimposition of cone beam computed tomography (CBCT) in growing patients and adults (surgical cases). The sample consisted of CBCT scans of 18 patients. For 10 patients, as the gold standard, the spatial position of the pretreatment CBCT was reoriented, saved as a reoriented volume, and then superimposed on the original image. For eight patients, four non-growing and four growing, the pre- and post-treatment scans were superimposed. Fast voxel-based superimposition was performed, with registration at the anterior cranial base. This superimposition process took 10-15s. The fit of the cranial base superimposition was verified by qualitative visualization of the semi-transparent axial, sagittal, and coronal cross-sectional slices of all corresponding anatomical structures. Virtual 3D surface models of the skull were generated via threshold segmentation, and superimposition errors in the reoriented models and the results of treatment for the treated cases were evaluated by 3D surface distances on colour-coded maps. The superimposition error of the spatial reorientation and for growing and non-growing patients was <0.5mm, which is acceptable and clinically insignificant. The voxel-based superimposition method evaluated was reproducible in different clinical conditions, rapid, and applicable for research and clinical practice.
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Affiliation(s)
- A Weissheimer
- Department of Orthodontics, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
| | - L M Menezes
- Department of Orthodontics, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - L Koerich
- International Dental Program, Virginia Commonwealth University, Richmond, VA, USA
| | - J Pham
- Advanced Orthodontic Program, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, CA, USA
| | - L H S Cevidanes
- Department of Orthodontics at the University of Michigan School of Dentistry, Ann Arbor, MI, USA
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Volumetric analysis of implanted biphasic calcium phosphate/collagen composite by three-dimensional cone beam computed tomography head model superimposition. J Craniomaxillofac Surg 2015; 43:167-74. [DOI: 10.1016/j.jcms.2014.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 10/17/2014] [Accepted: 11/04/2014] [Indexed: 11/18/2022] Open
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Im J, Kang SH, Lee JY, Kim MK, Kim JH. Surgery-first approach using a three-dimensional virtual setup and surgical simulation for skeletal Class III correction. Korean J Orthod 2014; 44:330-41. [PMID: 25473649 PMCID: PMC4250667 DOI: 10.4041/kjod.2014.44.6.330] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Revised: 03/12/2014] [Accepted: 03/18/2014] [Indexed: 11/10/2022] Open
Abstract
A 19-year-old woman presented to our dental clinic with anterior crossbite and mandibular prognathism. She had a concave profile, long face, and Angle Class III molar relationship. She showed disharmony in the crowding of the maxillomandibular dentition and midline deviation. The diagnosis and treatment plan were established by a three-dimensional (3D) virtual setup and 3D surgical simulation, and a surgical wafer was produced using the stereolithography technique. No presurgical orthodontic treatment was performed. Using the surgery-first approach, Le Fort I maxillary osteotomy and mandibular bilateral intraoral vertical ramus osteotomy setback were carried out. Treatment was completed with postorthodontic treatment. Thus, symmetrical and balanced facial soft tissue and facial form as well as stabilized and well-balanced occlusion were achieved.
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Affiliation(s)
- Joon Im
- Department of Orthodontics, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Sang Hoon Kang
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Ji Yeon Lee
- Department of Orthodontics, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Moon Key Kim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Jung Hoon Kim
- Department of Orthodontics, National Health Insurance Service Ilsan Hospital, Goyang, Korea
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Haas OL, Becker OE, de Oliveira RB. Computer-aided planning in orthognathic surgery-systematic review. Int J Oral Maxillofac Surg 2014; 44:S0901-5027(14)00430-5. [PMID: 25432508 DOI: 10.1016/j.ijom.2014.10.025] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 08/15/2014] [Accepted: 10/31/2014] [Indexed: 10/24/2022]
Abstract
The aim of this study was to conduct a systematic review to evaluate the accuracy and benefits of computer-aided planning in orthognathic surgery. The search was performed in PubMed, EMBASE, Cochrane Library, LILACS, and SciELO. The articles identified were assessed independently and in a blinded manner by two authors using selection criteria and eligibility criteria. The database search yielded 375 studies. Following the application of search and eligibility criteria, a final nine studies were included in the systematic review. The level of agreement between the authors in the study selection process was substantial (κ=0.767) and study eligibility was considered excellent (κ=0.863). The accuracy of translation was <1.2mm in the maxilla (vertical) and <1.1mm in the mandible (sagittal), and for rotation was <1.5° in the maxilla (pitch) and <1.8° in the mandible (pitch). Two studies showed a medium potential risk of bias and six studies showed a high potential risk of bias. Computer-aided planning in orthognathic surgery was considered accurate for the studies included in this systematic review. However, the low quality of these studies means that randomized clinical trials are needed to compare computer-aided planning to conventional planning in orthognathic surgery.
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Affiliation(s)
- O L Haas
- Department of Oral and Maxillofacial Surgery, Pontificial Catholic University of Rio Grande do Sul - PUC/RS, Rio Grande do Sul, Brazil.
| | - O E Becker
- Department of Oral and Maxillofacial Surgery, Pontificial Catholic University of Rio Grande do Sul - PUC/RS, Rio Grande do Sul, Brazil
| | - R B de Oliveira
- Department of Oral and Maxillofacial Surgery, Pontificial Catholic University of Rio Grande do Sul - PUC/RS, Rio Grande do Sul, Brazil
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Stokbro K, Aagaard E, Torkov P, Bell R, Thygesen T. Virtual planning in orthognathic surgery. Int J Oral Maxillofac Surg 2014; 43:957-65. [DOI: 10.1016/j.ijom.2014.03.011] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 03/14/2014] [Accepted: 03/19/2014] [Indexed: 10/25/2022]
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Seres L, Varga E, Kocsis A, Rasko Z, Bago B, Varga E, Piffko J. Correction of a severe facial asymmetry with computerized planning and with the use of a rapid prototyped surgical template: a case report/technique article. Head Face Med 2014; 10:27. [PMID: 25014992 PMCID: PMC4121308 DOI: 10.1186/1746-160x-10-27] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 06/06/2014] [Indexed: 11/23/2022] Open
Abstract
Management of significant facial asymmetry presents a challenge due to the geometric complexity of the bony and other facial structures. Manual model surgery is an essential part of treatment planning but it can be complicated, time-consuming and may contain potential errors. Computer-aided surgery has revolutionized the correction of maxillofacial deformities. The aim of this study was to report a case of facial asymmetry when computerised simulation surgery was performed instead of manual model surgery and a virtually planned wafer splint was fabricated. A 26-year-old male was presented with a severe right-sided hemimandibular elongation. Following presurgical orthodontics high-resolution computer tomography scan was performed. The stack images were reformatted into a three-dimensional structure. Virtual Le Fort-I osteotomy was performed and the symmetry of the maxilla was corrected with the help of a three-dimensional planning software. A virtual intermediate surgical wafer was designed and produced with three-dimensional rapid prototyping technology. The mandible was rotated into the correct position following virtual bilateral sagittal split osteotomy to visualize the movements of the osteotomised mandibular segments. The two-jaw procedure was performed according to the virtual plan. The facial symmetry was improved significantly and stable occlusion was achieved. This complex case shows the advantages of computer-aided surgical planning and three-dimensional rapid prototyping for the correction of facial asymmetries.
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Affiliation(s)
- Laszlo Seres
- Department of Oral and Maxillofacial Surgery, University of Szeged, Kalvaria sgt, 57, 6725 Szeged, Hungary.
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Shibazaki-Yorozuya R, Yamada A, Nagata S, Ueda K, Miller AJ, Maki K. Three-dimensional longitudinal changes in craniofacial growth in untreated hemifacial microsomia patients with cone-beam computed tomography. Am J Orthod Dentofacial Orthop 2014; 145:579-94. [PMID: 24785922 DOI: 10.1016/j.ajodo.2013.09.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 09/01/2013] [Accepted: 09/01/2013] [Indexed: 10/25/2022]
Abstract
INTRODUCTION The purpose of this study was to evaluate the concept that the affected and contralateral sides do not grow at the same rate in patients with hemifacial microsomia. Changes in the cranial base, maxilla, mandible, and occlusal plane were evaluated on 3-dimensional images from cone-beam computed tomography data in untreated patients. METHODS Six patients were classified as having mandibular Pruzansky/Kaban type I, IIA, or IIB hemifacial microsomia. Cone-beam computed tomography (MercuRay; Hitachi, Tokyo, Japan) scans were taken before orthodontic treatment during both growth and postpuberty periods. RESULTS The cranial base as defined by the position of the mastoid process was in a different position between the affected and contralateral control sides. The nasomaxillary length or height was shorter on the affected side for all 6 patients with hemifacial microsomia regardless of its severity, and it grew less than on the contralateral control side in 5 of the 6 patients. The occlusal plane angle became more inclined in 4 of the 6 patients. The mandibular ramus was shorter on the affected side in all patients and grew less on the affected side in 5 of the 6 patients. The mandibular body grew slower, the same, or faster than on the control side. CONCLUSIONS The cranial base, position of the condyle, lengths of the condyle and ramus, and positions of the gonial angle and condyle can vary between the affected and contralateral control sides of patients with hemifacial microsomia, with the ramus and nasomaxillary length usually growing slower than they grow on the control side. These results suggest that many factors affect the growth rate of the craniofacial region and, specifically, the mandible in patients with hemifacial microsomia.
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Affiliation(s)
- Reiko Shibazaki-Yorozuya
- Assistant professor, Department of Orthodontics, School of Dentistry, Showa University, Tokyo, Japan.
| | - Akira Yamada
- Lecturer, Department of Plastic and Reconstructive Surgery, Osaka Medical School, Osaka, Japan; visiting professor, World Craniofacial Foundation, Dallas, Tex
| | - Satoru Nagata
- Director, Nagata Microtia and Reconstructive Plastic Surgery Clinic, Saitama, Japan; visiting professor, Department of Plastic and Reconstructive Surgery, University of California Irvine School of Medicine, Irvine, Calif
| | - Kouichi Ueda
- Professor and chair, Department of Plastic and Reconstructive Surgery, Osaka Medical School, Osaka, Japan
| | - Arthur J Miller
- Professor, Division of Orthodontics, Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco, Calif
| | - Koutaro Maki
- Professor and chair, Department of Orthodontics, School of Dentistry, Showa University, Tokyo, Japan
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Use of the Matching Optimal Symmetry Plane Method in Planning Surgical Correction of Facial Asymmetry—A Preliminary Report of 20 Patients. J Oral Maxillofac Surg 2014; 72:1180.e1-13. [DOI: 10.1016/j.joms.2014.02.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 12/24/2013] [Accepted: 02/05/2014] [Indexed: 11/17/2022]
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Germec-Cakan D, Canter HI, Cakan U, Demir B. Interdisciplinary treatment of a patient with bilateral cleft lip and palate and congenitally missing and transposed teeth. Am J Orthod Dentofacial Orthop 2014; 145:381-92. [PMID: 24582029 DOI: 10.1016/j.ajodo.2013.06.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 06/01/2013] [Accepted: 06/01/2013] [Indexed: 11/19/2022]
Abstract
The comprehensive treatment of a patient with cleft lip and palate requires an interdisciplinary approach for functional and esthetic outcomes. A 20-year-old woman with bilateral cleft lip and palate had a chief complaint of unesthetic appearance of her teeth and the presence of oronasal fistulae. Her clinical and radiographic evaluation showed a dolichofacial growth pattern, a Class II skeletal relationship with retroclined maxillary central incisors, 5 mm of negative overjet, maxillary constriction, maxillary and mandibular crowding, congenitally missing maxillary right incisors and left lateral incisor, and a transposed maxillary left canine. Her treatment plan included the extraction of 3 premolars, maxillary expansion, segmental maxillary osteotomy, repair of the oronasal fistulae, rhinoplasty, periodontal surgery, and prosthodontic rehabilitation. To obtain a better occlusion and reduce the dimensions of the fistulae, orthognathic surgery comprising linear and rotational movements of the maxillary segments (premaxilla, right and left maxillary alveolar segments) in all 3 axes was planned by performing 3-dimensional virtual surgery on 3-dimensional computerized tomography. At the end of the interdisciplinary treatment, a functional occlusion, a harmonious profile, and patient satisfaction were achieved. Posttreatment records after 1 year showed stable results.
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Affiliation(s)
- Derya Germec-Cakan
- Associate professor, Department of Orthodontics, Faculty of Dentistry, Yeditepe University, Istanbul, Turkey.
| | - Halil Ibrahim Canter
- Associate professor, Department of Plastic and Reconstructive Surgery, Faculty of Medicine, Acibadem University, Istanbul, Turkey
| | - Umut Cakan
- Assistant professor, Department of Prosthodontics, Faculty of Dentistry, Istanbul Medipol University, Istanbul, Turkey
| | - Becen Demir
- Periodontist in private practice, Istanbul, Turkey
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Gaia B, Pinheiro L, Umetsubo O, Costa F, Cavalcanti M. Validity of three-dimensional computed tomography measurements for Le Fort I osteotomy. Int J Oral Maxillofac Surg 2014; 43:197-203. [DOI: 10.1016/j.ijom.2013.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2012] [Revised: 04/17/2013] [Accepted: 06/10/2013] [Indexed: 10/26/2022]
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Terzic A, Combescure C, Scolozzi P. Accuracy of computational soft tissue predictions in orthognathic surgery from three-dimensional photographs 6 months after completion of surgery: a preliminary study of 13 patients. Aesthetic Plast Surg 2014; 38:184-191. [PMID: 24337148 DOI: 10.1007/s00266-013-0248-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 11/13/2013] [Indexed: 12/25/2022]
Abstract
BACKGROUND This study aimed at a preliminary evaluation of the accuracy of computed three-dimensional (3D) predictions in orthognathic surgery by comparing predicted and real postoperative results. METHODS Pre- and postoperative 3D photographs and time-matching computed tomography (CT) and cone-beam CT scans of the face of 13 patients with dentofacial deformities were analyzed. Three-dimensional photographs were fused with preoperative CT data using dedicated software (3dMDvultus, version 2.2.0.8). Postoperative CT data were superposed on the preoperative skull. With an activated rendering function, the osteotomies were simulated in the preoperative CT data and the bony segments moved to their real postoperative position, resulting in a textured soft tissue prediction. This computed skin surface was compared with the real postoperative result by dividing the face into a surgically treated lower half and an untreated upper half. A statistical quantitative analysis of the surfaces was performed. RESULTS The mean differences between surfaces were +0.27 mm for the untreated upper half and -0.64 mm for the surgically treated lower half (p < 0.001). Averaged distributions of absolute errors showed more discrepancies between predicted and real postoperative results in the lower half of the face. Errors exceeding 3 mm were encountered in 4 % of the upper halves versus 29.8 % of the lower halves (p < 0.001). CONCLUSIONS The accuracy of a specific software platform for predicting 3D soft tissue changes after surgery was insufficient. LEVEL OF EVIDENCE IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Affiliation(s)
- Andrej Terzic
- Service of Maxillo-Facial and Oral Surgery, Department of Surgery, Faculty of Medicine, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, 1205, Geneva, Switzerland.
| | - Christophe Combescure
- Department of Health and Community Medicine, Centre of Clinical Research and Division of Clinical Epidemiology, Faculty of Medicine, Geneva University Hospitals, Geneva, Switzerland
| | - Paolo Scolozzi
- Service of Maxillo-Facial and Oral Surgery, Department of Surgery, Faculty of Medicine, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, 1205, Geneva, Switzerland
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A Novel Method to Determine the Potential Rotational Axis of the Mandible During Virtual Three-Dimensional Orthognathic Surgery. J Craniofac Surg 2013; 24:2014-7. [DOI: 10.1097/scs.0b013e3182a30597] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Stella F, Dolci G, Dell'Amore A, Badiali G, De Matteis M, Asadi N, Marchetti C, Bini A. Three-dimensional surgical simulation-guided navigation in thoracic surgery: a new approach to improve results in chest wall resection and reconstruction for malignant diseases. Interact Cardiovasc Thorac Surg 2013; 18:7-12. [PMID: 24144806 DOI: 10.1093/icvts/ivt440] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Oncological surgery of the chest wall should be performed to achieve free margins of at least 2 cm for metastasis or 4 cm for primary tumours. When the lesion is not visible or palpable, difficulty in identification may lead to a larger incision and a resection wider than is necessary. METHODS We report three cases of non-palpable metastatic chest wall lesions in which the preoperative surgical planning and the intraoperative identification of the tumour, and thus the subsequent chest wall reconstruction, was supported using computer-based surgery. RESULTS The application of high-resolution three-dimensional imaging technology and navigational systems is used in preoperative surgical planning to provide virtual simulations of a patient's skeletal changes and new soft tissue profile. Intraoperatively, a mobile navigation probe was used to identify the lesion, matching surgical landmarks and the preoperative computed tomography imaging, achieving the radical resection of the tumour with correct but not excessive surgical margins. Two patients underwent partial sternectomy followed by sternal allograft reconstruction. The third patient underwent chest wall resection followed by reconstruction using titanium bars and vicryl mesh. In all cases, the postoperative period was uneventful. After a follow-up period of 13.9 and 8 months, respectively, all patients are disease free, without complications. CONCLUSIONS Application of navigation technology in thoracic surgery should be encouraged because it is easy to use and requires a limited learning curve.
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Affiliation(s)
- Franco Stella
- Thoracic Surgery Unit, S. Orsola-Malpighi University Hospital, Bologna, Italy
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Benassarou M, Benassarou A, Meyer C. La navigation en chirurgie orthognathique. Application à l’ostéotomie de Le Fort I. ACTA ACUST UNITED AC 2013; 114:219-227. [DOI: 10.1016/j.revsto.2013.06.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 06/03/2013] [Indexed: 12/01/2022]
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Dhima M, Salinas TJ, Rieck KL. Virtual surgical planning for treatment of severe mandibular retrognathia with collapsed occlusion using contemporary surgical and prosthodontic protocols. J Oral Maxillofac Surg 2013; 71:1923-32. [PMID: 23988145 DOI: 10.1016/j.joms.2013.06.216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 06/13/2013] [Accepted: 06/13/2013] [Indexed: 11/30/2022]
Abstract
PURPOSE To meet functional and esthetic needs in an older adult for treatment of complex skeletal and dentoalveolar deformities using contemporary surgical and prosthodontic protocols. METHODS An older adult with dentoalveolar complex and skeletal deformity (mandibular retrognathia) was treated by a combination of virtual planning and current surgical and prosthodontic protocols. Treatment planning steps and sequencing are presented. RESULTS Skeletal, soft tissue, and dental harmonies were attained without biological or mechanical complications. Definitive oral rehabilitation was completed with a maxillary complete denture and a mandibular metal ceramic fixed implant-retained prosthesis. CONCLUSIONS A surgical and prosthodontic team approach in combination with technologic advances can predictably optimize esthetic and functional outcomes for patients with complex skeletal and dentoalveolar deformities.
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Affiliation(s)
- Matilda Dhima
- Assistant Professor, Mayo Clinic College of Medicine; Resident, Division of Prosthetic and Esthetic Dentistry, Department of Dental Specialties, Mayo Clinic, Rochester, MN.
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[Accuracy of morphological simulation for orthognatic surgery. Assessment of a 3D image fusion software]. ACTA ACUST UNITED AC 2013; 114:276-282. [PMID: 23932034 DOI: 10.1016/j.revsto.2013.06.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 04/08/2013] [Accepted: 06/27/2013] [Indexed: 10/26/2022]
Abstract
INTRODUCTION The CT/CBCT data allows for 3D reconstruction of skeletal and untextured soft tissue volume. 3D stereophotogrammetry technology has strongly improved the quality of facial soft tissue surface texture. The combination of these two technologies allows for an accurate and complete reconstruction. The 3D virtual head may be used for orthognatic surgical planning, virtual surgery, and morphological simulation obtained with a software dedicated to the fusion of 3D photogrammetric and radiological images. TECHNICAL NOTE The imaging material include: a multi-slice CT scan or broad field CBCT scan, a 3D photogrammetric camera. The operative image processing protocol includes the following steps: 1) pre- and postoperative CT/CBCT scan and 3D photogrammetric image acquisition; 2) 3D image segmentation and fusion of untextured CT/CBCT skin with the preoperative textured facial soft tissue surface of the 3D photogrammetric scan; 3) image fusion of the pre- and postoperative CT/CBCT data set virtual osteotomies, and 3D photogrammetric soft tissue virtual simulation; 4) fusion of virtual simulated 3D photogrammetric and real postoperative images, and assessment of accuracy using a color-coded scale to measure the differences between the two surfaces.
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Clinical recommendations regarding use of cone beam computed tomography in orthodontics. Position statement by the American Academy of Oral and Maxillofacial Radiology. Oral Surg Oral Med Oral Pathol Oral Radiol 2013; 116:238-57. [DOI: 10.1016/j.oooo.2013.06.002] [Citation(s) in RCA: 221] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Accepted: 06/03/2013] [Indexed: 12/13/2022]
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Katkar RA, Kummet C, Dawson D, Moreno Uribe L, Allareddy V, Finkelstein M, Ruprecht A. Comparison of observer reliability of three-dimensional cephalometric landmark identification on subject images from Galileos and i-CAT cone beam CT. Dentomaxillofac Radiol 2013; 42:20130059. [PMID: 23833319 DOI: 10.1259/dmfr.20130059] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Recently, there has been increasing interest in the use of cone beam CT (CBCT) for three-dimensional cephalometric analysis and craniofacial reconstruction in orthodontic and orthognathic surgical treatment planning. However, there is a need to redefine the cephalometric landmarks in three dimensional cephalometric analysis and to demonstrate the reproducibility of landmark identification on the type of CBCT machine being used. METHODS CBCT images of 20 subjects aged 15-25 years were selected, ten each from Galileos(®) (Sirona Dental Systems Inc., Bensheim, Germany) and Next Generation i-CAT(®) (Imaging Sciences International, Hatfield, PA). 2 observers located 18 landmarks on each subject twice using Dolphin-3D v. 11 software (Dolphin Imaging and Management Systems, Chatsworth, CA). Inter- and intraobserver reliability was assessed using Euclidean distances and linear mixed models. RESULTS Overall, the intra- and interobserver reliability was excellent for both machines. The landmarks Gonion, Nasion, Orbitale and Anterior Nasal Spine (ANS) showed the greatest median Euclidean distances for both intra- and interobserver measurements. There were significant observer effects in the unified models for Sella, Menton and all six dental landmarks. For Sella, the distances between the measures were significantly smaller (more closely spaced) on the i-CAT machine than on the Galileos in both intra- and interobserver measurements. CONCLUSIONS The intra- and interobserver reliability was excellent for both machines. Some of the landmarks were not as reproducible as others. Which machine produced the highest reliability depended on the landmark considered.
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Affiliation(s)
- R A Katkar
- Department of Oral and Maxillofacial Radiology, University of Florida, College of Dentistry, Gainesville, FL
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71
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Did the Hand Drawn Cephalometric Tracing Technique for Orthognathic Surgery Planning say its Last Word? Objective and Subjective Evaluation. J Craniofac Surg 2013; 24:e320-5. [DOI: 10.1097/scs.0b013e31828a7698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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72
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Hodges RJ, Atchison KA, White SC. Impact of cone-beam computed tomography on orthodontic diagnosis and treatment planning. Am J Orthod Dentofacial Orthop 2013; 143:665-74. [DOI: 10.1016/j.ajodo.2012.12.011] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 12/01/2012] [Accepted: 12/01/2012] [Indexed: 11/26/2022]
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73
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74
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Cottrell DA, Edwards SP, Gotcher JE. Surgical correction of maxillofacial skeletal deformities. J Oral Maxillofac Surg 2013; 70:e107-36. [PMID: 23127998 DOI: 10.1016/j.joms.2012.07.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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75
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Chang YB, Xia JJ, Yuan P, Kuo TH, Xiong Z, Gateno J, Zhou X. 3D segmentation of maxilla in cone-beam computed tomography imaging using base invariant wavelet active shape model on customized two-manifold topology. JOURNAL OF X-RAY SCIENCE AND TECHNOLOGY 2013; 21:251-282. [PMID: 23694914 PMCID: PMC3735231 DOI: 10.3233/xst-130369] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Recent advances in cone-beam computed tomography (CBCT) have rapidly enabled widepsread applications of dentomaxillofacial imaging and orthodontic practices in the past decades due to its low radiation dose, high spatial resolution, and accessibility. However, low contrast resolution in CBCT image has become its major limitation in building skull models. Intensive hand-segmentation is usually required to reconstruct the skull models. One of the regions affected by this limitation the most is the thin bone images. This paper presents a novel segmentation approach based on wavelet density model (WDM) for a particular interest in the outer surface of anterior wall of maxilla. Nineteen CBCT datasets are used to conduct two experiments. This mode-based segmentation approach is validated and compared with three different segmentation approaches. The results show that the performance of this model-based segmentation approach is better than those of the other approaches. It can achieve 0.25 ± 0.2 mm of surface error from ground truth of bone surface.
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Affiliation(s)
- Yu-Bing Chang
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77841, USA
| | - James J. Xia
- Department of Oral and Maxillofacial Surgery, The Methodist Hospital Research Institute, and Department of Surgery (Oral and Maxillofacial Surgery), Weil Medical College of Cornell University; Departments of Pediatric Surgery and Orthodontics, University of Texas Health Science Center, Houston, TX 77030, USA
| | - Peng Yuan
- Department of Oral and Maxillofacial Surgery, The Methodist Hospital Research Institute, and Department of Surgery (Oral and Maxillofacial Surgery), The Methodist Hospital, Weill Medical College of Cornell University, Houston, TX 77030, USA
| | - Tai-Hong Kuo
- Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Zixiang Xiong
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77841, USA
| | - Jaime Gateno
- Department of Oral and Maxillofacial Surgery, the Methodist Hospital Research Institute, and Department of Surgery (Oral and Maxillofacial Surgery), Weil Medical College of Cornell University, Houston, TX 77030, USA
| | - Xiaobo Zhou
- Center for Biotechnology and Informatics, The Methodist Hospital Research Institute and Department of Radiology, The Methodist Hospital, Weill Medical College of Cornell University, Houston, TX 77030, USA
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76
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Three-dimensional assessment of transverse skeletal changes after surgically assisted rapid maxillary expansion and orthodontic treatment: A prospective computerized tomography study. Am J Orthod Dentofacial Orthop 2012. [DOI: 10.1016/j.ajodo.2012.08.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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77
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Foley B, Lewallen B, Moore K, McKenna S. Poster 37: Is Virtual Surgical Planning in Orthognathic Surgery Error Proof? J Oral Maxillofac Surg 2012. [DOI: 10.1016/j.joms.2012.06.093] [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]
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78
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Dai J, Wang X, Hu G, Shen SG. A New Method to Move Mandible to Intercuspal Position in Virtual Three-Dimensional Orthognathic Surgery by Integrating Primary Occlusion Model. J Oral Maxillofac Surg 2012; 70:e484-9. [DOI: 10.1016/j.joms.2012.05.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2012] [Revised: 04/28/2012] [Accepted: 05/02/2012] [Indexed: 10/28/2022]
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79
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Patel A, Levine J, Brecht L, Saadeh P, Hirsch DL. Digital technologies in mandibular pathology and reconstruction. Atlas Oral Maxillofac Surg Clin North Am 2012; 20:95-106. [PMID: 22365432 DOI: 10.1016/j.cxom.2011.12.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- Ashish Patel
- Division of Oral and Maxillofacial Surgery, New York University Langone Medical Center, New York, NY 10016, USA
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80
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Charuakkra A, Prapayasatok S, Janhom A, Pongsiriwet S, Verochana K, Mahasantipiya P. Diagnostic performance of cone-beam computed tomography on detection of mechanically-created artificial secondary caries. Imaging Sci Dent 2011; 41:143-50. [PMID: 22232722 PMCID: PMC3251786 DOI: 10.5624/isd.2011.41.4.143] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 07/04/2011] [Accepted: 07/06/2011] [Indexed: 11/18/2022] Open
Abstract
Purpose The aim of this study was to compare the diagnostic accuracy of cone-beam computed tomography (CBCT) images and bitewing images in detection of secondary caries. Materials and Methods One hundred and twenty proximal slots of Class II cavities were randomly prepared on human premolar and molar teeth, and restored with amalgam (n=60) and composite resin (n=60). Then, artificial secondary caries lesions were randomly created using round steel No. 4 bur. The teeth were radiographed with a conventional bitewing technique and two CBCT systems; Pax-500ECT and Promax 3D. All images were evaluated by five observers. The area under the receiver operating characteristic (ROC) curve (Az) was used to evaluate the diagnostic accuracy. Significant difference was tested using the Friedman test (p value<0.05). Results The mean Az values for bitewing, Pax-500ECT, and Promax 3D imaging systems were 0.882, 0.995, and 0.978, respectively. Significant differences were found between the two CBCT systems and film (p=0.007). For CBCT systems, the axial plane showed the greatest Az value. Conclusion Based on the design of this study, CBCT images were better than bitewing radiographs in detection of secondary caries.
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Affiliation(s)
- Arnon Charuakkra
- Division of Oral and Maxillofacial Radiology, Department of Oral Biology and Diagnostic Sciences, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
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81
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Spin-Neto R, Marcantonio E, Gotfredsen E, Wenzel A. Exploring CBCT-based DICOM files. A systematic review on the properties of images used to evaluate maxillofacial bone grafts. J Digit Imaging 2011; 24:959-66. [PMID: 21448762 PMCID: PMC3222558 DOI: 10.1007/s10278-011-9377-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Previous studies suggests that cone beam computerized tomography (CBCT) images could provide reliable information regarding the fate of bone grafts in the maxillofacial region, but no systematic information regarding the standardization of CBCT settings and properties is available, i.e., there is a lack of information on how the images were generated, exported, and analyzed when bone grafts were evaluated. The aim of this study was to (1) do a systematic review on which type of CBCT-based DICOM images have been used for the evaluation of the fate of bone grafts in humans and (2) use a software suggested in the literature to test DICOM-based data sets, exemplifying the effect of variation in selected parameters (windowing/contrast control, plane definition, slice thickness, and number of measured slices) on the final image characteristics. The results from review identified three publications that used CBCT to evaluate maxillofacial bone grafts in humans, and in which the methodology/results comprised at least one of the expected outcomes (image acquisition protocol, image reconstruction, and image generation information). The experimental shows how the influence of information that was missing in the retrieved papers, can influence the reproducibility and the validity of image measurements. Although the use of CBCT-based images for the evaluation of bone grafts in humans has become more common, this does not reflect on a better standardization of the developed studies. Parameters regarding image acquisition and reconstruction, while important, are not addressed in the proper way in the literature, compromising the reproducibility and scientific impact of the studies.
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Affiliation(s)
- Rubens Spin-Neto
- Department of Periodontology, Araraquara Dental School, UNESP-Univ. Estadual Paulista, Araraquara, São Paulo, Brazil.
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Mazza E, Barbarino GG. 3D Mechanical Modeling of Facial Soft Tissue for Surgery Simulation. Facial Plast Surg Clin North Am 2011; 19:623-37, viii. [DOI: 10.1016/j.fsc.2011.07.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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83
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Patel A, Otterburn D, Saadeh P, Levine J, Hirsch DL. 3D Volume Assessment Techniques and Computer-Aided Design and Manufacturing for Preoperative Fabrication of Implants in Head and Neck Reconstruction. Facial Plast Surg Clin North Am 2011; 19:683-709, ix. [DOI: 10.1016/j.fsc.2011.07.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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84
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Damstra J, Fourie Z, Huddleston Slater JJ, Ren Y. Reliability and the smallest detectable difference of measurements on 3-dimensional cone-beam computed tomography images. Am J Orthod Dentofacial Orthop 2011; 140:e107-14. [DOI: 10.1016/j.ajodo.2011.02.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Revised: 02/01/2011] [Accepted: 02/01/2011] [Indexed: 10/17/2022]
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85
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Halloran JP, Erdemir A. Adaptive surrogate modeling for expedited estimation of nonlinear tissue properties through inverse finite element analysis. Ann Biomed Eng 2011; 39:2388-97. [PMID: 21544674 DOI: 10.1007/s10439-011-0317-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Accepted: 04/20/2011] [Indexed: 10/18/2022]
Abstract
Simulation-based prediction of specimen-specific biomechanical behavior commonly requires inverse analysis using geometrically consistent finite element (FE) models. Optimization drives such analyses but previous studies have highlighted a large computational cost dictated by iterative use of nonlinear FE models. The goal of this study was to evaluate the performance of a local regression-based adaptive surrogate modeling approach to decrease computational cost for both global and local optimization approaches using an inverse FE application. Nonlinear elastic material parameters for patient-specific heel-pad tissue were found, both with and without the surrogate model. Surrogate prediction replaced a FE simulation using local regression of previous simulations when the corresponding error estimate was less than a given tolerance. Performance depended on optimization type and tolerance value. The surrogate reduced local optimization expense up to 68%, but achieved accurate results for only 1 of 20 initial conditions. Conversely, up to a tolerance value of 20 N(2), global optimization with the surrogate yielded consistent parameter predictions with a concurrent decrease in computational cost (up to 77%). However, the local optimization method without the surrogate, although sensitive to the initial conditions, was still on average seven times faster than the global approach. Our results help establish guidelines for setting acceptable tolerance values while using an adaptive surrogate model for inverse FE analysis. Most important, the study demonstrates the benefits of a surrogate modeling approach for intensive FE-based iterative analysis.
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Affiliation(s)
- Jason P Halloran
- Computational Biomodeling Core and Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA.
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86
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Three-dimensional quantification of mandibular asymmetry through cone-beam computerized tomography. ACTA ACUST UNITED AC 2011; 111:757-70. [PMID: 21497527 DOI: 10.1016/j.tripleo.2011.02.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 11/09/2010] [Accepted: 02/01/2011] [Indexed: 11/23/2022]
Abstract
OBJECTIVE The aim of this study was to determine if 3-dimensional (3D) shape analysis precisely diagnoses right and left differences in asymmetry patients. STUDY DESIGN Cone-beam computerized tomography (CT) data were acquired before treatment from 20 patients with mandibular asymmetry. 3D shape analysis was used to localize and quantify the extent of virtually simulated asymmetry. Two approaches were used: 1) mirroring on the midsagittal plane determined from landmarks; and 2) mirroring on an arbitrary plane and then registering on the cranial base of the original image. The validation presented in this study used simulated data and was applied to 3 clinical cases. RESULTS For mirroring on the midsagittal plane, there was a >99% probability that the difference between measured and simulated asymmetry was <0.5 mm. For mirroring with cranial base registration, there was a >84% probability of differences <0.5 mm. CONCLUSIONS Mandibular asymmetry can be precisely quantified with both mirroring methods. Cranial base registration has the potential to be used for patients with trauma situations or when key landmarks are unreliable or absent.
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87
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McCormick SU, Drew SJ. Virtual Model Surgery for Efficient Planning and Surgical Performance. J Oral Maxillofac Surg 2011; 69:638-44. [DOI: 10.1016/j.joms.2010.10.047] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 10/14/2010] [Indexed: 10/18/2022]
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