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Nasiri-Tabrizi B, Basirun WJ, Walvekar R, Yeong CH, Phang SW. Exploring the potential of intermetallic alloys as implantable biomaterials: A comprehensive review. BIOMATERIALS ADVANCES 2024; 161:213854. [PMID: 38703541 DOI: 10.1016/j.bioadv.2024.213854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 04/07/2024] [Accepted: 04/08/2024] [Indexed: 05/06/2024]
Abstract
This review delves into the utilization of intermetallic alloys (IMAs) as advanced biomaterials for medical implants, scrutinizing their conceptual framework, fabrication challenges, and diverse manufacturing techniques such as casting, powder metallurgy, and additive manufacturing. Manufacturing techniques such as casting, powder metallurgy, additive manufacturing, and injection molding are discussed, with specific emphasis on achieving optimal grain sizes, surface roughness, and mechanical properties. Post-treatment methods aimed at refining surface quality, dimensional precision, and mechanical properties of IMAs are explored, including the use of heat treatments to enhance biocompatibility and corrosion resistance. The review presents an in-depth examination of IMAs-based implantable biomaterials, covering lab-scale developments and commercial-scale implants. Specific IMAs such as Nickel Titanium, Titanium Aluminides, Iron Aluminides, Magnesium-based IMAs, Zirconium-based IMAs, and High-entropy alloys (HEAs) are highlighted, with detailed discussions on their mechanical properties, including strength, elastic modulus, and corrosion resistance. Future directions are outlined, with an emphasis on the anticipated growth in the orthopedic devices market and the role of IMAs in meeting this demand. The potential of porous IMAs in orthopedics is explored, with emphasis on achieving optimal pore sizes and distributions for enhanced osseointegration. The review concludes by highlighting the ongoing need for research and development efforts in IMAs technologies, including advancements in design and fabrication techniques.
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Affiliation(s)
- Bahman Nasiri-Tabrizi
- Faculty of Innovation and Technology, School of Engineering, Chemical Engineering Programme, No.1 Jalan Taylor's, Taylor's University Malaysia, 47500 Subang Jaya, Selangor, Malaysia.
| | - Wan Jefrey Basirun
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Rashmi Walvekar
- Faculty of Innovation and Technology, School of Engineering, Chemical Engineering Programme, No.1 Jalan Taylor's, Taylor's University Malaysia, 47500 Subang Jaya, Selangor, Malaysia; Chitkara Centre for Research and Development, Chitkara University, Himachal Pradesh 174103, India
| | - Chai Hong Yeong
- School of Medicine, Faculty of Health and Medical Sciences, Taylor's University, 47500 Subang Jaya, Malaysia
| | - Siew Wei Phang
- Faculty of Innovation and Technology, School of Engineering, Chemical Engineering Programme, No.1 Jalan Taylor's, Taylor's University Malaysia, 47500 Subang Jaya, Selangor, Malaysia
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Zhang R, Li S, Liu Y. Assessing the accuracy of fabricated implant surgical guides by reconstructing the implant position based on cone beam computed tomography images: A dental technique. J Prosthet Dent 2023; 129:267-270. [PMID: 34120760 DOI: 10.1016/j.prosdent.2021.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 11/17/2022]
Abstract
A protocol for qualitatively reviewing the accuracy of fabricated implant surgical guides is presented. Once these guides have been inserted and fixed intraorally, cone beam computed tomography (CBCT) scans are made. Implant positions can be recalculated by processing the series of sleeve images on the CBCT scans. This protocol offers an opportunity for double-checking the accuracy of a fabricated guide before surgery in certain circumstances.
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Affiliation(s)
- Rui Zhang
- Lecturer, Department of Prosthodontics, Stomatology Center, Peking University Shenzhen Hospital, Shenzhen, PR China
| | - Shuchun Li
- Associate Professor, Department of Implantology, Stomatology Center, Peking University Shenzhen Hospital, Shenzhen, PR China
| | - Yushu Liu
- Lecturer, Department of Prosthodontics and Second Dental Clinical Division, Peking University School and Hospital of Stomatology, Beijing, PR China.
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Tang Y, Zhang Y, Meng Z, Sun Q, Peng L, Zhang L, Lu W, Liang W, Chen G, Wei Y. Accuracy of additive manufacturing in stomatology. Front Bioeng Biotechnol 2022; 10:964651. [PMID: 36051587 PMCID: PMC9424550 DOI: 10.3389/fbioe.2022.964651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 06/29/2022] [Indexed: 11/13/2022] Open
Abstract
With the rapid development of the three-dimensional (3D) printing technology in recent decades, precise and personalized manufacturing has been achieved gradually, bringing benefit to biomedical application, especially stomatology clinical practice. So far, 3D printing has been widely applied to prosthodontics, orthodontics, and maxillofacial surgery procedures, realizing accurate, efficient operation processes and promising treatment outcomes. Although the printing accuracy has improved, further exploration is still needed. Herein, we summarized the various additive manufacturing techniques and their applications in dentistry while highlighting the importance of accuracy (precision and trueness).
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Affiliation(s)
- Yao Tang
- Department of Orthodontics, Cranial Facial Growth and Development Center, Peking University School and Hospital of Stomatology, Beijing, China
- NMPA Key Laboratory for Dental Materials, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, Beijing, China
| | - Yunfan Zhang
- Department of Orthodontics, Cranial Facial Growth and Development Center, Peking University School and Hospital of Stomatology, Beijing, China
- NMPA Key Laboratory for Dental Materials, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, Beijing, China
| | - Zhaoqiang Meng
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Qiannan Sun
- Department of Orthodontics, Cranial Facial Growth and Development Center, Peking University School and Hospital of Stomatology, Beijing, China
- NMPA Key Laboratory for Dental Materials, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, Beijing, China
| | - Liying Peng
- Department of Orthodontics, Cranial Facial Growth and Development Center, Peking University School and Hospital of Stomatology, Beijing, China
- NMPA Key Laboratory for Dental Materials, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, Beijing, China
| | - Lingyun Zhang
- Department of Orthodontics, Cranial Facial Growth and Development Center, Peking University School and Hospital of Stomatology, Beijing, China
- NMPA Key Laboratory for Dental Materials, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, Beijing, China
| | - Wenhsuan Lu
- Department of Orthodontics, Cranial Facial Growth and Development Center, Peking University School and Hospital of Stomatology, Beijing, China
- NMPA Key Laboratory for Dental Materials, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, Beijing, China
| | - Wei Liang
- Department of Orthodontics, Cranial Facial Growth and Development Center, Peking University School and Hospital of Stomatology, Beijing, China
- NMPA Key Laboratory for Dental Materials, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, Beijing, China
- *Correspondence: Wei Liang, ; Gui Chen, ; Yan Wei,
| | - Gui Chen
- Department of Orthodontics, Cranial Facial Growth and Development Center, Peking University School and Hospital of Stomatology, Beijing, China
- NMPA Key Laboratory for Dental Materials, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health, Beijing, China
- *Correspondence: Wei Liang, ; Gui Chen, ; Yan Wei,
| | - Yan Wei
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
- *Correspondence: Wei Liang, ; Gui Chen, ; Yan Wei,
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Material Extrusion Based Fabrication of Surgical Implant Template and Accuracy Analysis. MATERIALS 2022; 15:ma15051738. [PMID: 35268972 PMCID: PMC8911434 DOI: 10.3390/ma15051738] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/20/2022] [Accepted: 02/23/2022] [Indexed: 01/11/2023]
Abstract
An implant template with great precision is significantly critical for clinical application. Currently, the application of an immediate implant remains limited by the deviations between the planned and actual achieved positions and long periods required for preparation of implant templates. Material Extrusion (MEX), as one kind of 3D printing method, is well known for its low cost and easy operation. However, the accuracy of the implant template printed by MEX has not been fully researched. To investigate the accuracy and feasibility of in vitro computer-guided surgery assisted with a MEX printed template, unidentified plaster samples missing a maxillary molar are digitalized. Mimics software (Materialise, Leuven, Belgium) is used for preoperative design. Surgical templates are fabricated by a MEX 3D printer (Lingtong III, Beijing SHINO, Beijing, China). Postoperative CBCT data are obtained after surgical template placement. The differences in positions of X, Y, Z, and dXYZ as well as angulations between the placed and the designed template are measured on labiolingual and mesiodistal planes. The deviations of the planned and the actual outcome in each dimension are observed and analyzed. Data from different samples indicate that the mean deviation of the angle measures approximately 3.640°. For position deviation, the maximum deviation is found in the z-direction and the mean deviation is about 0.365 ± 0.136 mm. The mean deviation of space Euclidean distance dXYZ is approximately 0.537 ± 0.123 mm. Implant templates fabricated by MEX present a relatively high accuracy for tooth-supported guide implantation.
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Mukhia N, Birur NP, Shubhasini AR, Shubha G, Keerthi G. Dimensional measurement accuracy of 3-dimensional models from cone beam computed tomography using different voxel sizes. Oral Surg Oral Med Oral Pathol Oral Radiol 2021; 132:361-369. [PMID: 34246615 DOI: 10.1016/j.oooo.2021.05.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 05/09/2021] [Accepted: 05/22/2021] [Indexed: 11/17/2022]
Abstract
OBJECTIVES To compare the geometric accuracy and measurement reliability of 3-dimensional (3D) reconstructed models of the mandible created from cone beam computed tomography (CBCT) images obtained with 0.2-mm and 0.4-mm voxel sizes with the reference standard model and compare the accuracy of the CBCT-based models to each other. STUDY DESIGN The reference standard 3D model of a dry human mandible was obtained using a white light scanner. The mandible was scanned with CBCT 10 times at each voxel size. The models created from the CBCT data were compared with the reference standard by using a point-based rigid registration algorithm where the distance differences between the superimposed CBCT models and the reference standard model were recorded. The measurements derived from the 2 CBCT-based scans were also compared. RESULTS Mean deviations from the reference standard for 0.2-mm and 0.4-mm voxel scans were 0.4342 mm and 0.4580 mm, respectively (P ≥ .16). The CBCT scans with both 0.2-mm and 0.4-mm voxels produced good measurement reliability and did not significantly differ from each other (P ≥ .20). CONCLUSIONS CBCT scans with 0.2-mm and 0.4-mm voxel sizes delivered similarly accurate models. Larger voxels can be used to minimize radiation exposure.
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Affiliation(s)
- Nirza Mukhia
- Department of Oral Medicine and Radiology, K.L.E. Society's Institute of Dental Sciences, Bengaluru, India
| | - N Praveen Birur
- Department of Oral Medicine and Radiology, K.L.E. Society's Institute of Dental Sciences, Bengaluru, India.
| | - A R Shubhasini
- Department of Oral Medicine and Radiology, K.L.E. Society's Institute of Dental Sciences, Bengaluru, India
| | - G Shubha
- Department of Oral Medicine and Radiology, K.L.E. Society's Institute of Dental Sciences, Bengaluru, India
| | - G Keerthi
- Department of Oral Medicine and Radiology, K.L.E. Society's Institute of Dental Sciences, Bengaluru, India
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Additive Manufacturing Processes in Medical Applications. MATERIALS 2021; 14:ma14010191. [PMID: 33401601 PMCID: PMC7796413 DOI: 10.3390/ma14010191] [Citation(s) in RCA: 90] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/16/2020] [Accepted: 12/27/2020] [Indexed: 12/29/2022]
Abstract
Additive manufacturing (AM, 3D printing) is used in many fields and different industries. In the medical and dental field, every patient is unique and, therefore, AM has significant potential in personalized and customized solutions. This review explores what additive manufacturing processes and materials are utilized in medical and dental applications, especially focusing on processes that are less commonly used. The processes are categorized in ISO/ASTM process classes: powder bed fusion, material extrusion, VAT photopolymerization, material jetting, binder jetting, sheet lamination and directed energy deposition combined with classification of medical applications of AM. Based on the findings, it seems that directed energy deposition is utilized rarely only in implants and sheet lamination rarely for medical models or phantoms. Powder bed fusion, material extrusion and VAT photopolymerization are utilized in all categories. Material jetting is not used for implants and biomanufacturing, and binder jetting is not utilized for tools, instruments and parts for medical devices. The most common materials are thermoplastics, photopolymers and metals such as titanium alloys. If standard terminology of AM would be followed, this would allow a more systematic review of the utilization of different AM processes. Current development in binder jetting would allow more possibilities in the future.
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Turek P, Budzik G, Przeszłowski Ł. Assessing the Radiological Density and Accuracy of Mandible Polymer Anatomical Structures Manufactured Using 3D Printing Technologies. Polymers (Basel) 2020; 12:polym12112444. [PMID: 33105810 PMCID: PMC7690625 DOI: 10.3390/polym12112444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/18/2020] [Accepted: 10/19/2020] [Indexed: 12/18/2022] Open
Abstract
Nowadays, 3D printing technologies are among the rapidly developing technologies applied to manufacture even the most geometrically complex models, however no techniques dominate in the area of craniofacial applications. This study included 12 different anatomical structures of the mandible, which were obtained during the process of reconstructing data from the Siemens Somatom Sensation Open 40 system. The manufacturing process used for the 12 structures involved the use of 8 3D printers and 12 different polymer materials. Verification of the accuracy and radiological density was performed with the CT160Xi Benchtop tomography system. The most accurate results were obtained in the case of models manufactured using the following materials: E-Model (Standard Deviation (SD) = 0.145 mm), FullCure 830 (SD = 0.188 mm), VeroClear (SD = 0.128 mm), Digital ABS-Ivory (SD = 0.117 mm), and E-Partial (SD = 0.129 mm). In the case of radiological density, ABS-M30 was similar to spongious bone, PC-10 was similar to the liver, and Polylactic acid (PLA) and Polyethylene terephthalate (PET) were similar to the spleen. Acrylic resin materials were able to imitate the pancreas, kidney, brain, and heart. The presented results constitute valuable guidelines that may improve currently used radiological phantoms and may provide support to surgeons in the process of performing more precise treatments within the mandible area.
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Kim YH, Jung BY, Han SS, Woo CW. Accuracy evaluation of 3D printed interim prosthesis fabrication using a CBCT scanning based digital model. PLoS One 2020; 15:e0240508. [PMID: 33064731 PMCID: PMC7567388 DOI: 10.1371/journal.pone.0240508] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 09/29/2020] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES This study aimed to evaluate the marginal and internal gaps in 3D-printed interim crowns made from digital models of cone-beam computed tomography (CBCT) conversion data. MATERIALS AND METHODS Sixteen polyvinylsiloxane impressions were taken from patients for single crown restorations and were scanned using CBCT. The scanning data were converted to positive Standard Triangulation Language (STL) files using custom-developed software. The fabricated stone models were scanned with an intraoral optical scanner (IOS) to compare the surface accuracy with the STL data obtained by CBCT. The converted STL files were utilized to fabricate interim crowns with a photopolymer using a digital light-processing 3D printer. The replica method was used to analyze the accuracy. The marginal and internal gaps in the replica specimen of each interim crown were measured with a digital microscope. The Friedman test and Mann-Whitney U test (Wilcoxon-signed rank test) were conducted to compare the measurements of the marginal and internal gaps with a 95% level of confidence. RESULTS The root-mean-square values of the CBCT and IOS ranged from 41.00 to 126.60 μm, and the mean was 60.12 μm. The mean values of the marginal, internal, and total gaps were 132.96 (±139.23) μm, 137.86 (±103.09) μm, and 135.68 (±120.30) μm, respectively. There were no statistically significant differences in the marginal or internal gaps between the mesiodistal and buccolingual surfaces, but the marginal area (132.96 μm) and occlusal area (255.88 μm) had significant mean differences. CONCLUSION The marginal gap of the fabricated interim crowns based on CBCT STL data was within the acceptable range of clinical success. Through ongoing developments of high-resolution CBCT and the digital model conversion technique, CBCT might be an alternative method to acquire digital models for interim crown fabrication.
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Affiliation(s)
- Young Hyun Kim
- Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea
| | - Bock-Young Jung
- Department of Advanced General Dentistry, Yonsei University College of Dentistry, Seoul, Korea
| | - Sang-Sun Han
- Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea
| | - Chang-Woo Woo
- Central Dental Laboratory, Dental Hospital of Yonsei University, Seoul, Korea
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Kim T, Lee S, Kim GB, Hong D, Kwon J, Park JW, Kim N. Accuracy of a simplified 3D-printed implant surgical guide. J Prosthet Dent 2020; 124:195-201.e2. [DOI: 10.1016/j.prosdent.2019.06.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 06/04/2019] [Accepted: 06/04/2019] [Indexed: 12/21/2022]
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Alevizakos V, Mitov G, Teichert F, von See C. The color stability and wear resistance of provisional implant restorations: A prospective clinical study. Clin Exp Dent Res 2020; 6:568-575. [PMID: 32736414 PMCID: PMC7545226 DOI: 10.1002/cre2.311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 06/11/2020] [Indexed: 11/07/2022] Open
Abstract
Objectives The aim of the present clinical study was to determine the stability of color and resistance against abrasion and attrition of provisional single implant restorations. Material and Methods A group of 16 patients were treated with provisional crowns made of Telio CAD. Shortly before the insertion the crowns were photographed and scanned using a 3D‐laser scanner. After 8 weeks of clinical usage, the crowns were photographed and scanned again. The vertical occlusal wear and color changes between the restorations were measured. Results The occlusal plane of the original crown showed a statistically significant reduction of 0.052 mm ± 0.037 mm 8 weeks after placement (p < .05). For the stability of color, a change in red, green and blue was described. All three scopes (red, green and blue) showed a statistically significant reduction (p < .05). Conclusions This prospective clinical study showed that Telio CAD experienced a significant occlusal reduction and color change after an intraoral placement of 8 weeks.
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Affiliation(s)
- Vasilios Alevizakos
- Center for Digital Technologies in Dentistry and CAD/CAMDanube Private UniversityKrems an der DonauAustria
| | - Gergo Mitov
- Center for Prosthetic Dentistry and Dental BiomaterialsDanube Private UniversityKremsAustria
| | - Franziska Teichert
- Center for Digital Technologies in Dentistry and CAD/CAMDanube Private UniversityKrems an der DonauAustria
| | - Constantin von See
- Center for Digital Technologies in Dentistry and CAD/CAMDanube Private UniversityKrems an der DonauAustria
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Vasques MT, Mori M, Laganá DC. Three-dimensional printing of occlusal devices for temporomandibular disorders by using a free CAD software program: A technical report. J Prosthet Dent 2020; 123:232-235. [DOI: 10.1016/j.prosdent.2018.12.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 12/06/2018] [Accepted: 12/06/2018] [Indexed: 11/29/2022]
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Wallner J, Schwaiger M, Hochegger K, Gsaxner C, Zemann W, Egger J. A review on multiplatform evaluations of semi-automatic open-source based image segmentation for cranio-maxillofacial surgery. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2019; 182:105102. [PMID: 31610359 DOI: 10.1016/j.cmpb.2019.105102] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 09/09/2019] [Accepted: 09/27/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND AND OBJECTIVES Computer-assisted technologies, such as image-based segmentation, play an important role in the diagnosis and treatment support in cranio-maxillofacial surgery. However, although many segmentation software packages exist, their clinical in-house use is often challenging due to constrained technical, human or financial resources. Especially technological solutions or systematic evaluations of open-source based segmentation approaches are lacking. The aim of this contribution is to assess and review the segmentation quality and the potential clinical use of multiple commonly available and license-free segmentation methods on different medical platforms. METHODS In this contribution, the quality and accuracy of open-source segmentation methods was assessed on different platforms using patient-specific clinical CT-data and reviewed with the literature. The image-based segmentation algorithms GrowCut, Robust Statistics Segmenter, Region Growing 3D, Otsu & Picking, Canny Segmentation and Geodesic Segmenter were investigated in the mandible on the platforms 3D Slicer, MITK and MeVisLab. Comparisons were made between the segmentation algorithms and the ground truth segmentations of the same anatomy performed by two clinical experts (n = 20). Assessment parameters were the Dice Score Coefficient (DSC), the Hausdorff Distance (HD), and Pearsons correlation coefficient (r). RESULTS The segmentation accuracy was highest with the GrowCut (DSC 85.6%, HD 33.5 voxel) and the Canny (DSC 82.1%, HD 8.5 voxel) algorithm. Statistical differences between the assessment parameters were not significant (p < 0.05) and correlation coefficients were close to the value one (r > 0.94) for any of the comparison made between the segmentation methods and the ground truth schemes. Functionally stable and time-saving segmentations were observed. CONCLUSION High quality image-based semi-automatic segmentation was provided by the GrowCut and the Canny segmentation method. In the cranio-maxillofacial complex, these segmentation methods provide algorithmic alternatives for image-based segmentation in the clinical practice for e.g. surgical planning or visualization of treatment results and offer advantages through their open-source availability. This is the first systematic multi-platform comparison that evaluates multiple license-free, open-source segmentation methods based on clinical data for the improvement of algorithms and a potential clinical use in patient-individualized medicine. The results presented are reproducible by others and can be used for clinical and research purposes.
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Affiliation(s)
- Jürgen Wallner
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria; Computer Algorithms for Medicine Laboratory, Graz 8010, Austria.
| | - Michael Schwaiger
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria; Computer Algorithms for Medicine Laboratory, Graz 8010, Austria
| | - Kerstin Hochegger
- Computer Algorithms for Medicine Laboratory, Graz 8010, Austria; Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz 8010, Austria
| | - Christina Gsaxner
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria; Computer Algorithms for Medicine Laboratory, Graz 8010, Austria; Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz 8010, Austria
| | - Wolfgang Zemann
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria
| | - Jan Egger
- Medical University of Graz, Department of Oral and Maxillofacial Surgery, Auenbruggerplatz 5/1, Graz 8036, Austria; Computer Algorithms for Medicine Laboratory, Graz 8010, Austria; Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz 8010, Austria; Shanghai Jiao Tong University, School of Mechanical Engineering, Dong Chuan Road 800, Shanghai 200240, China
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Claassen L, Luedtke P, Yao D, Ettinger S, Daniilidis K, Nowakowski AM, Mueller-Gerbl M, Stukenborg-Colsman C, Plaass C. The geometrical axis of the talocrural joint-Suggestions for a new measurement of the talocrural joint axis. Foot Ankle Surg 2019; 25:371-377. [PMID: 30306891 DOI: 10.1016/j.fas.2018.02.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 01/04/2018] [Accepted: 02/02/2018] [Indexed: 02/04/2023]
Abstract
BACKGROUND Despite intensive research there is no consensus about the talocrural joint axis. The aim of the present study is a new method to determinate the geometric rotational axis of the talocrural joint. METHODS We analyzed 98 CT-scans of full cadaver Caucasian legs. We generated three-dimensional reconstruction models of the talus. A best fitting cone was orientated to the talar articular surface. The geometric rotational axis was defined to be the axis of this cone. RESULTS The geometric rotational axis of the talocrural joint is orientated from lateral-distal to medial-proximal (85.6°±10 compared to anatomical tibial axis in torsional plane), from posterior-distal to anterior-proximal (81.43°±44.35 compared to anatomical tibial axis in sagittal plane) and from posterior-medial to anterior-lateral (169.2°±5.91 compared to intermalleolar axis in axial plane). CONCLUSIONS The consideration of our results might be helpful for better understanding of ankle biomechanics.
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Affiliation(s)
- Leif Claassen
- Orthopedic Department of the Hannover Medical School at DIAKOVERE Annastift, Germany.
| | - Philipp Luedtke
- Orthopedic Department of the Hannover Medical School at DIAKOVERE Annastift, Germany.
| | - Daiwei Yao
- Orthopedic Department of the Hannover Medical School at DIAKOVERE Annastift, Germany.
| | - Sarah Ettinger
- Orthopedic Department of the Hannover Medical School at DIAKOVERE Annastift, Germany.
| | | | | | | | | | - Christian Plaass
- Orthopedic Department of the Hannover Medical School at DIAKOVERE Annastift, Germany.
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Clifton W, Nottmeier E, Damon A, Dove C, Pichelmann M. The Future of Biomechanical Spine Research: Conception and Design of a Dynamic 3D Printed Cervical Myelography Phantom. Cureus 2019; 11:e4591. [PMID: 31309016 PMCID: PMC6609301 DOI: 10.7759/cureus.4591] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background Three-dimensional (3D) printing is a growing practice in the medical community for patient care and trainee education as well as production of equipment and devices. The development of functional models to replicate physiologic systems of human tissue has also been explored, although to a lesser degree. Specifically, the design of 3D printed phantoms that possess comparable biomechanical properties to human cervical vertebrae is an underdeveloped area of spine research. In order to investigate the functional uses of cervical 3D printed models for replicating the complex physiologic and biomechanical properties of the human subaxial cervical spine, our institution has created a prototype that accurately reflects these properties and provides a novel method of assessing spinal canal dimensions using simulated myelography. To our knowledge, this is the first 3D printed phantom created to study these parameters. Materials and methods A de-identified cervical spine computed tomography imaging file was segmented using threshold modulation in 3D Slicer software. The subaxial vertebrae (C3-C7) of the scan were individualized by separating the facet joint spaces and uncovertebral joints within the software in order to create individual stereolithography (STL) files. Each individual vertebra was printed on an Ultimaker S5 dual-extrusion printer using white “tough” polylactic acid filament. A human cadaveric subaxial cervical spine was harvested to provide a control for our experiment. Both models were assessed and compared in flexion and extension dynamic motion grossly and fluoroscopically. The maximum angles of deformation on X-ray imaging were recorded using DICOM (Digital Imaging and Communications in Medicine) viewing software. In order to compare the ability to assess canal dimensions of the models using fluoroscopic imaging, a myelography simulation was designed. Results The cervical phantom demonstrated excellent ability to resist deformation in flexion and extension positions, attributed to the high quality of initial segmentation. The gross and fluoroscopic dynamic movement of the phantom was analogous to the cadaver model. The myelography simulator adequately demonstrated the canal dimensions in static and dynamic positions for both models. Pertinent anatomic landmarks were able to be effectively visualized for assessment of canal measurements for sagittal and transverse dimensions. Conclusions By utilizing the latest technologies in DICOM segmentation and 3D printing, our institution has created the first cervical myelography phantom for biomechanical evaluation and trainee instruction. By combining new technologies with anatomical knowledge, quality 3D printing shows great promise in becoming a standard player in the future of spinal biomechanical research.
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Affiliation(s)
| | | | - Aaron Damon
- Neurosurgery, Mayo Clinic, Jacksonville, USA
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Evaluation of the Applicability of 3d Models as Perceived by the Students of Health Sciences. J Med Syst 2019; 43:108. [PMID: 30887131 DOI: 10.1007/s10916-019-1238-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/06/2019] [Indexed: 10/27/2022]
Abstract
The methodology and style of teaching anatomy in the faculties of Health Sciences is evolving due to the changes being introduced as a result of the application of new technologies. This brings a more positive attitude in the students, enabling an active participation during the lessons. One of these new technologies is the creation of 3D models that reliably recreates the anatomical details of real bone pieces and allow access of anatomy students to bone pieces that are not damaged and possess easily identifiable anatomical details. In our work, we have presented previously created 3D models of skull and jaw to the students of anatomy in the Faculties of Health Sciences of the University of Salamanca, Spain. The faculties included were odontology, medicine, occupational therapy nursing, health sciences and physiotherapy. A survey was carried out to assess the usefulness of these 3D models in the practical study of anatomy. The total number of students included in the survey was 280.The analysis of the results presents a positive evaluation about the use of 3D models by the students studying anatomy in different Faculties of Health Sciences.
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Automated Fractured Bone Segmentation and Labeling from CT Images. J Med Syst 2019; 43:60. [DOI: 10.1007/s10916-019-1176-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 01/21/2019] [Indexed: 10/27/2022]
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Computed tomography data collection of the complete human mandible and valid clinical ground truth models. Sci Data 2019; 6:190003. [PMID: 30694227 PMCID: PMC6350631 DOI: 10.1038/sdata.2019.3] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 12/14/2018] [Indexed: 11/08/2022] Open
Abstract
Image-based algorithmic software segmentation is an increasingly important topic in many medical fields. Algorithmic segmentation is used for medical three-dimensional visualization, diagnosis or treatment support, especially in complex medical cases. However, accessible medical databases are limited, and valid medical ground truth databases for the evaluation of algorithms are rare and usually comprise only a few images. Inaccuracy or invalidity of medical ground truth data and image-based artefacts also limit the creation of such databases, which is especially relevant for CT data sets of the maxillomandibular complex. This contribution provides a unique and accessible data set of the complete mandible, including 20 valid ground truth segmentation models originating from 10 CT scans from clinical practice without artefacts or faulty slices. From each CT scan, two 3D ground truth models were created by clinical experts through independent manual slice-by-slice segmentation, and the models were statistically compared to prove their validity. These data could be used to conduct serial image studies of the human mandible, evaluating segmentation algorithms and developing adequate image tools.
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Natsis K, Piagkou M, Chryssanthou I, Skandalakis GP, Tsakotos G, Piagkos G, Politis C. A simple method to estimate the linear length of the orbital floor in complex orbital surgery. J Craniomaxillofac Surg 2018; 47:185-189. [PMID: 30497949 DOI: 10.1016/j.jcms.2018.11.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 06/29/2018] [Accepted: 11/02/2018] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The orbital floor (OrF) and infraorbital rim (IOR) repair in cases of complete destruction is challenging mainly due to the fact that the defect length cannot be measured. The aim of the current study is to develop a method of calculating the Orf length by using the gender and the lengths of the medial, superior and lateral orbital walls (OrW) of the same orbit. MATERIAL AND METHODS Ninety-seven (59 male and 38 female) European adult dry skulls were classified according to age: 20-39, 40-59 and 60 years and above. The length of each OrW was measured by using the direct distance between the optic foramen and a landmark in each orbital rim. RESULTS A side asymmetry was detected for the lengths of the inferior, superior and medial OrW. Although a gender dimorphism was detected, no correlation with the age was found. Using the Stepwise multiple regression analysis two formulas were developed, one for the right and one for the left OrF with coefficient of determination R2 0.43 and 0.57, respectively. CONCLUSIONS The proposed formulas represent a simple, applicable and individualized method to calculate the OrF linear length in cases of complete destruction of the IOR and OrF, with accuracy and without the use of expertise material. Such data may improve the surgery planning of orbital floor fractures and complex orbital reconstructions.
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Affiliation(s)
- Konstantinos Natsis
- Department of Anatomy and Surgical Anatomy, (Chairperson: Professor Dr. K. NATSIS), Medical School, Aristotle University of Thessaloniki, Greece
| | - Maria Piagkou
- Department of Anatomy, (Chairperson: Professor Dr. P. SKANDALAKIS), Medical School, National and Kapodistrian University of Athens, Greece.
| | - Ioannis Chryssanthou
- Department of Anatomy, (Chairperson: Professor Dr. P. SKANDALAKIS), Medical School, National and Kapodistrian University of Athens, Greece
| | - Georgios P Skandalakis
- Department of Anatomy, (Chairperson: Professor Dr. P. SKANDALAKIS), Medical School, National and Kapodistrian University of Athens, Greece
| | - Georgios Tsakotos
- Department of Anatomy, (Chairperson: Professor Dr. P. SKANDALAKIS), Medical School, National and Kapodistrian University of Athens, Greece
| | - Giannoulis Piagkos
- Department of Anatomy, (Chairperson: Professor Dr. P. SKANDALAKIS), Medical School, National and Kapodistrian University of Athens, Greece
| | - Constantinus Politis
- OMFS-IMPATH Research Group Department of Imaging and Pathology, (Chairperson: Professor Dr. C. Politis), Belgium; Department of Oral and Maxillofacial Surgery, Hasselt University, Diepenbeek, Belgium
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Advances in Optomechatronics: An Automated Tilt-Rotational 3D Scanner for High-Quality Reconstructions. PHOTONICS 2018. [DOI: 10.3390/photonics5040042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
3D vision systems are more and more required in a large variety of applications and mostly for mechanical and medical purposes. This paper presents the study and realization of a prototype of a structured light automated tilt-rotational 3D vision system for high-quality reconstructions of components of various sizes and in cases of freeform and complex surfaces. The main goal of this research work was to develop an instrument with the following main novelties: configurability for different object sizes, high precision and resolution levels and ability to automatically generate the mesh representing the full scanned objects without any intervention of the operator by means of a 2 degrees of freedom automated tilt-rotational mechanical positioning system. A detailed analysis of the instrument and the procedures and results of the performance tests are presented, together with the examination of possible strategies to obtain a better performance, especially by the calibration and the synchronization between the optical and the mechanical systems. As a result, the prototype and the performance parameters resulting from the experimental campaigns, are reported.
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Budzik G, Turek P. Improved accuracy of mandible geometry reconstruction at the stage of data processing and modeling. AUSTRALASIAN PHYSICAL & ENGINEERING SCIENCES IN MEDICINE 2018; 41:687-695. [PMID: 29978281 PMCID: PMC6133077 DOI: 10.1007/s13246-018-0664-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 07/02/2018] [Indexed: 01/27/2023]
Abstract
The article presents a comparative study of influence of the Lanczos resampling filter on improving the accuracy of reconstruction of mandible geometries. The research was performed on eight different patients. Digital Imaging and Communications in Medicine data were obtained on the Siemens Somatom Sensation Open 40 scanner. At the stage of reconstruction, the same parameters were utilized, while only slice thickness was changed. Modeling with voxel dimensions of 0.4 mm × 0.4 mm × 1.5 mm was chosen as the gold standard over the modeling approach comprising voxel dimensions of 0.4 mm × 0.4 mm × 3.0 mm and improved using the Lanczos resampling filter. The influence of the Lanczos resampling filter on the accuracy of reconstruction of mandible geometry is very similar for the eight presented patients. The average results show a distribution with a positive skew and kurtosis. The value of skewness is 0.713 and kurtosis is 4.221 for the model without Lanczos filtering applied. When the Lanczos filtering is applied the value of skewness is 0.542 and kurtosis is 4.313. Based on 95% confidence, changes in layer thickness from 1.5 mm to 3 mm generated errors reconstructing the geometry of the mandible at the value of 0.153 mm ± 1.209 mm. In models improved using the Lanczos resampling filter, the errors generated in reconstructing the geometry of the mandible were minimized at the value of 0.160 mm ± 1.007 mm. The presented research highlights new opportunities to improve the accuracy of reconstruction geometry of the mandible at the stage of data processing.
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Affiliation(s)
- Grzegorz Budzik
- Faculty of Mechanical Engineering & Aeronautics, Rzeszow University of Technology, Powstańców Warszawy Avenue 12, 35-959 Rzeszow, Poland
| | - Paweł Turek
- Faculty of Mechanical Engineering & Aeronautics, Rzeszow University of Technology, Powstańców Warszawy Avenue 12, 35-959 Rzeszow, Poland
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Wallner J, Hochegger K, Chen X, Mischak I, Reinbacher K, Pau M, Zrnc T, Schwenzer-Zimmerer K, Zemann W, Schmalstieg D, Egger J. Clinical evaluation of semi-automatic open-source algorithmic software segmentation of the mandibular bone: Practical feasibility and assessment of a new course of action. PLoS One 2018; 13:e0196378. [PMID: 29746490 PMCID: PMC5944980 DOI: 10.1371/journal.pone.0196378] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 04/12/2018] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Computer assisted technologies based on algorithmic software segmentation are an increasing topic of interest in complex surgical cases. However-due to functional instability, time consuming software processes, personnel resources or licensed-based financial costs many segmentation processes are often outsourced from clinical centers to third parties and the industry. Therefore, the aim of this trial was to assess the practical feasibility of an easy available, functional stable and licensed-free segmentation approach to be used in the clinical practice. MATERIAL AND METHODS In this retrospective, randomized, controlled trail the accuracy and accordance of the open-source based segmentation algorithm GrowCut was assessed through the comparison to the manually generated ground truth of the same anatomy using 10 CT lower jaw data-sets from the clinical routine. Assessment parameters were the segmentation time, the volume, the voxel number, the Dice Score and the Hausdorff distance. RESULTS Overall semi-automatic GrowCut segmentation times were about one minute. Mean Dice Score values of over 85% and Hausdorff Distances below 33.5 voxel could be achieved between the algorithmic GrowCut-based segmentations and the manual generated ground truth schemes. Statistical differences between the assessment parameters were not significant (p<0.05) and correlation coefficients were close to the value one (r > 0.94) for any of the comparison made between the two groups. DISCUSSION Complete functional stable and time saving segmentations with high accuracy and high positive correlation could be performed by the presented interactive open-source based approach. In the cranio-maxillofacial complex the used method could represent an algorithmic alternative for image-based segmentation in the clinical practice for e.g. surgical treatment planning or visualization of postoperative results and offers several advantages. Due to an open-source basis the used method could be further developed by other groups or specialists. Systematic comparisons to other segmentation approaches or with a greater data amount are areas of future works.
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Affiliation(s)
- Jürgen Wallner
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
- Computer Algorithms for Medicine (Cafe) Laboratory, Graz, Austria
| | - Kerstin Hochegger
- Computer Algorithms for Medicine (Cafe) Laboratory, Graz, Austria
- Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz, Austria
| | - Xiaojun Chen
- School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Irene Mischak
- Department of Dental Medicine and Oral Health, Medical University of Graz, Billrothgasse 4, Graz, Austria
| | - Knut Reinbacher
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Mauro Pau
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Tomislav Zrnc
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Katja Schwenzer-Zimmerer
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Wolfgang Zemann
- Department of Oral & Maxillofacial Surgery, Medical University of Graz, Auenbruggerplatz 5/1, Graz, Austria
| | - Dieter Schmalstieg
- Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz, Austria
| | - Jan Egger
- Computer Algorithms for Medicine (Cafe) Laboratory, Graz, Austria
- Institute for Computer Graphics and Vision, Graz University of Technology, Inffeldgasse 16c/II, Graz, Austria
- BioTechMed-Graz, Krenngasse 37/1, Graz, Austria
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Ordon AJ, Kozakiewicz M, Wilczynski M, Loba P. The influence of concomitant medial wall fracture on the results of orbital floor reconstruction. J Craniomaxillofac Surg 2018. [PMID: 29534910 DOI: 10.1016/j.jcms.2018.01.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
INTRODUCTION Up to 35% of orbital floor fractures extend to the medial wall. This results in restriction of both abduction and adduction, leading to horizontal diplopia. The greater the defect, the more pronounced the enophthalmos. AIM OF THE STUDY The aim of the study was to determine the influence of concomitant medial wall defects on enophthalmos and diplopia, and the influence of intraoperative revision on the results of surgical reconstruction in patients with orbital floor fracture. MATERIAL AND METHODS 78 cases of orbital floor fracture, with or without concomitant medial wall defect, were retrospectively analyzed. Reconstruction surgeries were performed in a similar fashion, but with variation in the alloplastic materials used. Careful investigation of the area was performed during the surgery. RESULTS Patients with associated medial wall defects had significantly more pronounced enophthalmos than those with isolated floor fracture, with no such difference after the orbital reconstruction. Postoperative vertical diplopia was more common in patients with an associated medial defect. CONCLUSIONS Associated medial wall defect leads to more severe enophthalmos at presentation. However, if the medial aspect of the orbital wall is revised properly, postoperative outcomes are not inferior to those in cases of isolated floor fracture.
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Affiliation(s)
- Agata Joanna Ordon
- Department of Binocular Vision Pathophysiology and Strabismus, Medical University of Lodz, Poland
| | | | | | - Piotr Loba
- Department of Ophthalmology, Medical University of Lodz, Poland; Department of Binocular Vision Pathophysiology and Strabismus, Medical University of Lodz, Poland.
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Different Digitalization Techniques for 3D Printing of Anatomical Pieces. J Med Syst 2018; 42:46. [PMID: 29372421 DOI: 10.1007/s10916-018-0903-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 01/18/2018] [Indexed: 10/18/2022]
Abstract
The use of different technological devices that allow the creation of three-dimensional models is in constant evolution, allowing a greater application of these technologies in different fields of health sciences and medical training. The equipment for digitalization is becoming increasingly sophisticated allowing obtaining three-dimensional which are more defined and similar to real image and original object. In this work, different modalities of designing 3D anatomical models of bone pieces are presented, for use by students of different disciplines in Health Sciences. To do this we digitalized bone pieces, with different models of scanners, producing images that can be transformed for 3D printing, with a Colido X 3045 printer by digital treatment with different software.
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CT image segmentation methods for bone used in medical additive manufacturing. Med Eng Phys 2018; 51:6-16. [DOI: 10.1016/j.medengphy.2017.10.008] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 09/22/2017] [Accepted: 10/09/2017] [Indexed: 01/07/2023]
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Doerfler HM, Huempfner-Hierl H, Kruber D, Schulze P, Hierl T. Template-Based Orbital Wall Fracture Treatment Using Statistical Shape Analysis. J Oral Maxillofac Surg 2017; 75:1475.e1-1475.e8. [DOI: 10.1016/j.joms.2017.03.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/26/2017] [Accepted: 03/27/2017] [Indexed: 10/19/2022]
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Cone-beam computed tomography of the orbit and optic canal volumes. J Craniomaxillofac Surg 2016; 44:1342-9. [DOI: 10.1016/j.jcms.2016.06.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 04/25/2016] [Accepted: 06/02/2016] [Indexed: 11/17/2022] Open
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