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Gómez VJ, Martín-González A, Zafra-Vallejo V, Zubillaga-Rodríguez I, Fernández-García A, Sánchez-Aniceto G. Controversies in point-of-care 3D printing for oncological and reconstructive surgery with free software in oral and maxillofacial surgery: European regulations, costs, and timeframe. Int J Oral Maxillofac Surg 2024; 53:650-660. [PMID: 38290865 DOI: 10.1016/j.ijom.2024.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 12/01/2023] [Accepted: 01/05/2024] [Indexed: 02/01/2024]
Abstract
The aim of this paper is to discuss the controversies surrounding the most recent European regulations, as well as the cost, for a 3D printing workflow using free-source software in the context of a tertiary level university hospital in the Spanish public health system. Computer-aided design and manufacturing (CAD/CAM) for head and neck oncological surgery with the printing of biomodels, cutting guides, and patient-specific implants has made it possible to simplify and make this type of highly complex surgery more predictable. This technology is not without drawbacks, such as increased costs and the lead times when planning with the biomedical industry. A review of the current European legislation and the literature on this subject was performed, and comparisons made with the authors' in-house 3D printing setup using free software and different 3D printers. The cost analysis revealed that for the cheapest setup with free software, it would be possible to amortize the investment from case 2, and in all cases the initial investment would be amortized before case 9. The timeframe ranged from 2 weeks with the biomedical industry to 72 h with point-of-care 3D printing. It is now possible to develop point-of-care 3D printing in any hospital with almost any budget.
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Affiliation(s)
- V J Gómez
- Oral and Maxillofacial Surgery Department, 12 de Octubre University Hospital, Madrid, Spain.
| | - A Martín-González
- Engineering Department, 3D Printing Point-of-Care Unit, 12 de Octubre University Hospital, Madrid, Spain
| | - V Zafra-Vallejo
- Oral and Maxillofacial Surgery Department, 12 de Octubre University Hospital, Madrid, Spain
| | - I Zubillaga-Rodríguez
- Oral and Maxillofacial Surgery Department, 12 de Octubre University Hospital, Madrid, Spain
| | - A Fernández-García
- Oral and Maxillofacial Surgery Department, 12 de Octubre University Hospital, Madrid, Spain
| | - G Sánchez-Aniceto
- Oral and Maxillofacial Surgery Department, 12 de Octubre University Hospital, Madrid, Spain
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Aftabi H, Sagl B, Lloyd JE, Prisman E, Hodgson A, Fels S. To what extent can mastication functionality be restored following mandibular reconstruction surgery? A computer modeling approach. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2024; 250:108174. [PMID: 38640839 DOI: 10.1016/j.cmpb.2024.108174] [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: 12/30/2023] [Revised: 03/26/2024] [Accepted: 04/10/2024] [Indexed: 04/21/2024]
Abstract
STATEMENT OF PROBLEM Advanced cases of head and neck cancer involving the mandible often require surgical removal of diseased sections and subsequent replacement with donor bone. During the procedure, the surgeon must make decisions regarding which bones or tissues to resect. This requires balancing tradeoffs related to issues such as surgical access and post-operative function; however, the latter is often difficult to predict, especially given that long-term functionality also depends on the impact of post-operative rehabilitation programs. PURPOSE To assist in surgical decision-making, we present an approach for estimating the effects of reconstruction on key aspects of post-operative mandible function. MATERIAL AND METHODS We develop dynamic biomechanical models of the reconstructed mandible considering different defect types and validate them using literature data. We use these models to estimate the degree of functionality that might be achieved following post-operative rehabilitation. RESULTS We find significant potential for restoring mandibular functionality, even in cases involving large defects. This entails an average trajectory error below 2 mm, bite force comparable to a healthy individual, improved condyle mobility, and a muscle activation change capped at a maximum of 20%. CONCLUSION These results suggest significant potential for adaptability in the masticatory system and improved post-operative rehabilitation, leading to greater restoration of jaw function.
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Affiliation(s)
- Hamidreza Aftabi
- Department of ECE, University of British Columbia, Vancouver, V6T 1Z4, BC, Canada.
| | - Benedikt Sagl
- Center for Clinical Research, University Clinic of Dentistry, Medical University of Vienna, Vienna, 1090, Austria
| | - John E Lloyd
- Department of ECE, University of British Columbia, Vancouver, V6T 1Z4, BC, Canada
| | - Eitan Prisman
- Department of Surgery, University of British Columbia, Gordon and Leslie Diamond Health Care Centre, Vancouver, V5Z 1M9, BC, Canada
| | - Antony Hodgson
- Department of Mechanical Engineering, University of British Columbia, Vancouver, V6T 1Z4, BC, Canada
| | - Sidney Fels
- Department of ECE, University of British Columbia, Vancouver, V6T 1Z4, BC, Canada
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Liu Z, Zhong Y, Lyu X, Zhang J, Huang M, Liu S, Zheng L. Accuracy of the modified tooth-supported 3D printing surgical guides based on CT, CBCT, and intraoral scanning in maxillofacial region: A comparison study. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2024:101853. [PMID: 38555078 DOI: 10.1016/j.jormas.2024.101853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 03/27/2024] [Indexed: 04/02/2024]
Abstract
BACKGROUND Tooth-supported surgical guides have demonstrated superior accuracy compared with bone-supported guides. This study aimed to modify the fabrication of tooth-supported guides for compatibility with tumor resection procedures and investigate their accuracy. METHODS Patients with tumors who underwent osteotomy with the assistance of modified tooth- or bone-supported surgical guides were included. Virtual surgical planning (VSP) was employed to align three dimensional (3D) models extracted from intraoperative computed tomography (CT) images. The distances and angular deviations between the actual osteotomy plane and preoperative plane were recorded. A comparative analysis of osteotomy discrepancies between tooth-supported and bone-supported guides, as well as among tooth-supported guides based on CT, cone-beam CT (CBCT), or intraoral scanner (IOS) was conducted. The factors influencing the precision of the guides were analyzed. RESULTS Sixty patients with 81 resection planes were included in this study. In the tooth-supported group, the mean deviations in the osteotomy plane and angle were 1.39 mm and 4.30°, respectively, whereas those of the bone-supported group were 2.16 mm and 4.95°. In the tooth-supported isotype guide groups, the mean deviations of the osteotomy plane were 1.39 mm, 1.47 mm, 1.23 mm across CT, CBCT, and IOS, respectively. The accuracy of the modified tooth-supported guides remained consistent regardless of number and position of the teeth supporting the guide and location of the osteotomy lines. CONCLUSIONS The findings indicate that the modified tooth-supported surgical guides demonstrated high accuracy in the maxillofacial region, contributing to a reduction in the amount of surgically detached soft tissue.
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Affiliation(s)
- Zezhao Liu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center for Stomatology & National Clinical Research Center for Oral Diseases, Beijing & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Yiwei Zhong
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center for Stomatology & National Clinical Research Center for Oral Diseases, Beijing & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Xiaoming Lyu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center for Stomatology & National Clinical Research Center for Oral Diseases, Beijing & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Jie Zhang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center for Stomatology & National Clinical Research Center for Oral Diseases, Beijing & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Mingwei Huang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center for Stomatology & National Clinical Research Center for Oral Diseases, Beijing & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Shuming Liu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center for Stomatology & National Clinical Research Center for Oral Diseases, Beijing & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Lei Zheng
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Center for Stomatology & National Clinical Research Center for Oral Diseases, Beijing & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China.
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Marschall JS, Oppenheim MA, Kushner GM. Can a Point-of-Care 3D Printing Workflow Produce Accurate and Successful Results for Craniomaxillofacial Trauma? J Oral Maxillofac Surg 2024; 82:207-217. [PMID: 38012957 DOI: 10.1016/j.joms.2023.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 10/21/2023] [Accepted: 11/06/2023] [Indexed: 11/29/2023]
Abstract
BACKGROUND Computer-aided design and manufacturing (CAD/CAM) is having a profound impact on craniomaxillofacial surgery, and point-of-care (POC) solutions for repairing facial trauma are starting to emerge. PURPOSE The purpose of this study was to demonstrate the success and accuracy of a POC 3D printing workflow for craniomaxillofacial trauma. STUDY DESIGN, SETTING, SAMPLE A retrospective cohort study was undertaken to analyze subjects presenting to a level 1 trauma center after sustaining facial trauma and were then treated using the POC 3D printing workflow. Subjects were excluded if they were not treated with the POC 3D printing workflow, were lost to follow-up, or if clinical data were incomplete. PREDICTOR VARIABLE Predictor variables included the cause of trauma (mechanism), location of the mandibular fracture, type of fracture, mandibular severity score, and repair error (ie, root mean square error (RMSE) value for planned vs actual outcome). MAIN OUTCOME VARIABLE(S) The primary outcome variables were case success and case error. Success was defined as clinical and radiographic evidence of bony stability at 3 months. Case accuracy was calculated overlaying preoperative plan data to postoperative data generating a numerical value (RMSE value, mm). COVARIATES Covariates included age (years), gender (male/female), surgery time (mins), and CAD/CAM time (preoperative). ANALYSES Descriptive statistics were calculated for each variable. Dependence between rates or counts was established using the Wilcoxon rank sum or Fisher's exact test. Linear regression model was computed to discern how predictor variables influence RMSE. A P value < .05 was considered statistically significant. RESULTS The sample included 27 subjects (19 male/8 female). The average age of all subjects was 46.4 ± 18.0 years. Common mechanisms of injury were assault (33%) and self-inflicted gunshots (SIGSW; 30%), and the average severity score for mandible injury was (13.5 ± 3.3). Ninety-three percent of cases were deemed successful. The average repair accuracy (RMSE value) was 3.4 ± 1.8 mm. A linear regression model indicated those injured by a fall (β-coefficient 1.99; P = .010), motor vehicle collision (β-coefficient 1.49; P = .043), or SIGSW (β-coefficient 2.82; P < .001) correlated with RMSE. CONCLUSION AND RELEVANCE In-house CAD/CAM technologies can be utilized at the POC to repair complex facial trauma accurately and successfully.
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Affiliation(s)
- Jeffrey S Marschall
- Assistant Professor, Department of Oral and Maxillofacial Surgery, University of Iowa Hospital and Clinics, Iowa City, IA.
| | | | - George M Kushner
- Professor and Chairman, Department of Oral and Maxillofacial Surgery, University of Louisville, Louisville, KY
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Tran KL, Yang DH, Wang E, Ham JI, Wong A, Panchal M, Dial HS, Durham JS, Prisman E. Dental implantability of mandibular reconstructions: Comparing freehand surgery with virtual surgical planning. Oral Oncol 2023; 140:106396. [PMID: 37068411 DOI: 10.1016/j.oraloncology.2023.106396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 04/05/2023] [Accepted: 04/11/2023] [Indexed: 04/19/2023]
Affiliation(s)
- Khanh Linh Tran
- Division of Otolaryngology, Department of Surgery, Faculty of Medicine, University of British Columbia, Diamond Health Care Centre, 4th Floor, 2775 Laurel Street, Vancouver, BC V5Z 1M9, Canada
| | - David H Yang
- Faculty of Dentistry, University of British Columbia, 2151, Wesbrook Mall, Vancouver, BC V6T 1Z3 Canada
| | - Edward Wang
- Division of Otolaryngology, Department of Surgery, Faculty of Medicine, University of British Columbia, Diamond Health Care Centre, 4th Floor, 2775 Laurel Street, Vancouver, BC V5Z 1M9, Canada
| | - Jennifer Inseon Ham
- Division of Otolaryngology, Department of Surgery, Faculty of Medicine, University of British Columbia, Diamond Health Care Centre, 4th Floor, 2775 Laurel Street, Vancouver, BC V5Z 1M9, Canada
| | - Angela Wong
- Faculty of Dentistry, University of British Columbia, 2151, Wesbrook Mall, Vancouver, BC V6T 1Z3 Canada
| | - Maharshi Panchal
- Division of Otolaryngology, Department of Surgery, Faculty of Medicine, University of British Columbia, Diamond Health Care Centre, 4th Floor, 2775 Laurel Street, Vancouver, BC V5Z 1M9, Canada
| | - Harkaran Singh Dial
- Division of Otolaryngology, Department of Surgery, Faculty of Medicine, University of British Columbia, Diamond Health Care Centre, 4th Floor, 2775 Laurel Street, Vancouver, BC V5Z 1M9, Canada
| | - James Scott Durham
- Division of Otolaryngology, Department of Surgery, Faculty of Medicine, University of British Columbia, Diamond Health Care Centre, 4th Floor, 2775 Laurel Street, Vancouver, BC V5Z 1M9, Canada
| | - Eitan Prisman
- Division of Otolaryngology, Department of Surgery, Faculty of Medicine, University of British Columbia, Diamond Health Care Centre, 4th Floor, 2775 Laurel Street, Vancouver, BC V5Z 1M9, Canada.
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Tran KL, Mong ML, Durham JS, Prisman E. Benefits of Patient-Specific Reconstruction Plates in Mandibular Reconstruction Surgical Simulation and Resident Education. J Clin Med 2022; 11:jcm11185306. [PMID: 36142953 PMCID: PMC9501640 DOI: 10.3390/jcm11185306] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 08/21/2022] [Accepted: 08/31/2022] [Indexed: 11/28/2022] Open
Abstract
Poorly contoured mandibular reconstruction plates are associated with postoperative complications. Recently, a technique emerged whereby preoperative patient-specific reconstructive plates (PSRP) are developed in the hopes of eliminating errors in the plate-bending process. This study’s objective is to determine if reconstructions performed with PSRP are more accurate than manually contoured plates. Ten Otolaryngology residents each performed two ex vivo mandibular reconstructions, first using a PSRP followed by a manually contoured plate. Reconstruction time, CT scans, and accuracy measurements were collected. Paired Student’s t-test was performed. There was a significant difference between reconstructions with PSRP and manually contoured plates in: plate-mandible distance (0.39 ± 0.21 vs. 0.75 ± 0.31 mm, p = 0.0128), inter-fibular segment gap (0.90 ± 0.32 vs. 2.24 ± 1.03 mm, p = 0.0095), mandible-fibula gap (1.02 ± 0.39 vs. 2.87 ± 2.38 mm, p = 0.0260), average reconstruction deviation (1.11 ± 0.32 vs. 1.67 ± 0.47 mm, p = 0.0228), mandibular angle width difference (5.13 ± 4.32 vs. 11.79 ± 4.27 mm, p = 0.0221), and reconstruction time (16.67 ± 4.18 vs. 33.78 ± 8.45 min, p = 0.0006). Lower plate-mandible distance has been demonstrated to correlate with decreased plate extrusion rates. Similarly, improved bony apposition promotes bony union. PSRP appears to provide a more accurate scaffold to guide the surgeons in assembling donor bone segments, which could potentially improve patient outcome and reduce surgical time. Additionally, in-house PSRP can serve as a low-cost surgical simulation tool for resident education.
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Nyirjesy SC, Heller M, von Windheim N, Gingras A, Kang SY, Ozer E, Agrawal A, Old MO, Seim NB, Carrau RL, Rocco JW, VanKoevering KK. The role of computer aided design/computer assisted manufacturing (CAD/CAM) and 3- dimensional printing in head and neck oncologic surgery: A review and future directions. Oral Oncol 2022; 132:105976. [PMID: 35809506 DOI: 10.1016/j.oraloncology.2022.105976] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 06/17/2022] [Indexed: 01/12/2023]
Abstract
Microvascular free flap reconstruction has remained the standard of care in reconstruction of large tissue defects following ablative head and neck oncologic surgery, especially for bony structures. Computer aided design/computer assisted manufacturing (CAD/CAM) and 3-dimensionally (3D) printed models and devices offer novel solutions for reconstruction of bony defects. Conventional free hand techniques have been enhanced using 3D printed anatomic models for reference and pre-bending of titanium reconstructive plates, which has dramatically improved intraoperative and microvascular ischemia times. Improvements led to current state of the art uses which include full virtual planning (VP), 3D printed osteotomy guides, and patient specific reconstructive plates, with advanced options incorporating dental rehabilitation and titanium bone replacements into the primary surgical plan through use of these tools. Limitations such as high costs and delays in device manufacturing may be mitigated with in house software and workflows. Future innovations still in development include printing custom prosthetics, 'bioprinting' of tissue engineered scaffolds, integration of therapeutic implants, and other possibilities as this technology continues to rapidly advance. This review summarizes the literature and serves as a summary guide to the historic, current, advanced, and future possibilities of 3D printing within head and neck oncologic surgery and bony reconstruction. This review serves as a summary guide to the historic, current, advanced, and future roles of CAD/CAM and 3D printing within the field of head and neck oncologic surgery and bony reconstruction.
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Affiliation(s)
- Sarah C Nyirjesy
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Margaret Heller
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Natalia von Windheim
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Amelia Gingras
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Stephen Y Kang
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Enver Ozer
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Amit Agrawal
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Matthew O Old
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Nolan B Seim
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Ricardo L Carrau
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - James W Rocco
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States
| | - Kyle K VanKoevering
- Department of Otolaryngology- Head and Neck Surgery, The James Cancer Hospital and Solove Research Institute, The Ohio State University Wexner Medical Center, 915 Olentangy River Road, Columbus, OH 43210, United States.
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Pu JJ, Choi WS, Yeung WK, Yang WF, Zhu WY, Su YX. A Comparative Study on a Novel Fibula Malleolus Cap to Increase the Accuracy of Oncologic Jaw Reconstruction. Front Oncol 2022; 11:743389. [PMID: 35070962 PMCID: PMC8767155 DOI: 10.3389/fonc.2021.743389] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 12/07/2021] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVES Although computer-assisted surgery using fibula flap has been widely applied for oncologic jaw reconstruction in recent years, the inaccurate positioning of the fibula harvest guide brings sliding and rotational errors, which leads to compromised accuracy in simultaneous implant placement and dental rehabilitation. This study aimed to develop a novel three-dimensional (3D)-printed patient-specific fibula malleolus cap to increase oncologic reconstruction accuracy. METHODS In this prospective comparative study with a recent historical control cohort, patients in need of oncologic jaw reconstruction with fibula free flaps were recruited. In the study group, the fibula was harvested with the guide of the malleolus cap, whereas in the control group, without the malleolus cap. Deviations of location and angulation of distal fibula osteotomies, jaw reconstruction segments, and simultaneous dental implants were compared. RESULTS Twenty patients were recruited, with 10 in each arm. The application of the malleolus cap significantly reduced the deviations in locations and angles of distal fibula osteotomies, from 9.5 to 4.1 mm and 25.3° to 8.7°. For the simultaneous dental implants placed in the fibula flaps, there was a significant increase in the accuracy of implant platform locations (the average deviation from 3.2 to 1.3 mm), apex locations (from 3.8 to 1.5 mm), and angles (from 11.3° to 4.6°). No significant difference was detected in the accuracy of fibula reconstruction segments. CONCLUSIONS We developed a novel fibula malleolus cap to overcome the sliding and rotational errors during fibula flap harvesting for oncologic jaw reconstruction, with increased accuracy in simultaneous dental implants. This is a step forward to achieve a satisfactory functional outcome of jaw reconstruction with dental rehabilitation.
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Affiliation(s)
- Jingya Jane Pu
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Wing Shan Choi
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Wai Kan Yeung
- Division of Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Wei-Fa Yang
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Wang-Yong Zhu
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Yu-Xiong Su
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
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Deane EC, Liu AQ, Nguyen S, Anderson DW, Durham JS, Prisman E. Synchrony in head and neck surgery: Feasibility and outcomes of simultaneous scapular free flap reconstruction. Head Neck 2021; 44:760-769. [PMID: 34936161 DOI: 10.1002/hed.26963] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/15/2021] [Accepted: 12/10/2021] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The scapula free flap is a versatile option in head and neck reconstruction but is less amenable to simultaneous harvest and ablation. METHODS Retrospective series (2015-2021) of consecutive scapula flaps. Cases categorized as simultaneous versus sequential, compared for operative time, oncological and patient-reported outcomes. RESULTS Seventy consecutive scapula free flaps were performed (n = 21 simultaneous, n = 49 sequential). Mandible reconstruction was performed in 51.0% and 61.9% of sequential and simultaneous cases, respectively; 49.0% and 38.1% addressed bony maxillary defects. Simultaneous surgery reduced operative time by 37.9% (151 min, p < 0.00001) and there were fewer tracheostomies performed (p < 0.005). Rates of positive margins and free flap compromise were equivalent (n = 1, 4.8% vs. n = 2, 4.1%). There was no difference in patient-reported outcomes. CONCLUSIONS This series demonstrates feasibility, efficacy, and outcomes of bony scapula reconstruction of maxillofacial defects comparing simultaneous and sequential approaches. Benefits of the two-team approach are highlighted including decreased operative time.
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Affiliation(s)
- Emily C Deane
- Department of Otolaryngology - Head & Neck Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Alice Q Liu
- Department of Otolaryngology - Head & Neck Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sally Nguyen
- Department of Otolaryngology - Head & Neck Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Donald W Anderson
- Department of Otolaryngology - Head & Neck Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - James Scott Durham
- Department of Otolaryngology - Head & Neck Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Eitan Prisman
- Department of Otolaryngology - Head & Neck Surgery, University of British Columbia, Vancouver, British Columbia, Canada
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Institutional-based and commercial virtual surgical planning in maxillomandibular reconstruction - Comparing the digital plan and postoperative scan. J Plast Reconstr Aesthet Surg 2021; 75:1399-1407. [PMID: 34952809 DOI: 10.1016/j.bjps.2021.11.075] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 11/14/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND Virtual surgical planning (VSP) is increasingly used in maxillomandibular osseous free flap reconstruction. Non-commercial ('in-house') VSP may offer the same level of accuracy and other benefits, without the inflated costs and time delays inherent in using commercial providers. Comparisons between commercial and in-house methods are lacking. This study aims to determine the accuracy of VSP, compare in-house and commercially planned cases, and explore predictors of the reconstruction error. METHODS Seventy-six patients who had a virtually planned maxillomandibular reconstruction between January 2012 and July 2020 were retrospectively identified. The preoperative digital plan was compared to the postoperative CT scan in terms of length of bone segments, angle between adjacent segments and intercondylar, and intergonial angle distances (mandibular reconstructions only). RESULTS Forty-four patients fulfilled the inclusion criteria. The mean intergonial and intercondylar distances error was 1.7 ± 1.01 mm, mean segment length error was 1.3 ± 1.40 mm, and mean angles error was 1.9 ± 2.32°. The difference in error of in-house VSP compared to commercial VSP was not statistically significant for intercondylar and intergonial distance (p = 0.76), segment length (p = 0.15), or angle between segments (p = 0.92). The increased error was associated with osteoradionecrosis as the indication for surgery, greater number of segments, and secondary reconstructions. CONCLUSION VSP is an accurate method of maxillary and mandibular reconstruction. In-house VSP may be similar in accuracy to commercial VSP options. Higher levels of inaccuracy are likely to occur in more complex reconstructions, particularly secondary reconstructions, and in the setting of osteoradionecrosis.
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Versatility of a single piece scapular tip and lateral border free flap for mandibular reconstruction: A virtual study on angle correspondence. Oral Oncol 2021; 121:105379. [PMID: 34140234 DOI: 10.1016/j.oraloncology.2021.105379] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/04/2021] [Accepted: 06/07/2021] [Indexed: 11/20/2022]
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Nguyen S, Tran KL, Wang E, Britton H, Durham JS, Prisman E. Maxillectomy defects: Virtually comparing fibular and scapular free flap reconstructions. Head Neck 2021; 43:2623-2633. [PMID: 33961717 DOI: 10.1002/hed.26731] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 03/17/2021] [Accepted: 04/22/2021] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND This study virtually compares patient-specific fibular and scapular reconstructions for maxillectomies. METHODS Nine maxillectomy defects were created on 10 maxillas and virtually reconstructed with patient-specific fibulas and scapulas. Reconstructions were compared for restoring midface cephalometrics, dental implantability, and pedicle length. RESULTS Of 90 maxillectomy defects, the vertically oriented scapula provided improved orbital floor and maxillary height reconstructions (p < 0.001), albeit at the cost of dental implantability compared to the fibula (p < 0.001). In two defects crossing the midline, the fibula, allowing for more osteotomies, provided improved maxillary projection. In the remaining three defects crossing the midline, the horizontally oriented scapula was comparable to the fibula. Fibular and scapular reconstructions were amenable for dental implantation and had similar pedicle lengths, although favoring scapula in extensive defects. CONCLUSION Fibular and scapular reconstructions of maxillectomy defects provide unique strengths. This virtual analysis can guide a goal-oriented reconstruction based on defect type and patient-specific goals.
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Affiliation(s)
- Sally Nguyen
- Division of Otolaryngology-Head & Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Khanh Linh Tran
- Division of Otolaryngology-Head & Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Edward Wang
- Division of Otolaryngology-Head & Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Heidi Britton
- Division of Otolaryngology-Head & Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - James Scott Durham
- Division of Otolaryngology-Head & Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Eitan Prisman
- Division of Otolaryngology-Head & Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
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Computerized Surgical Planning in Mandibular Reconstruction: Barriers to Implementation and Cost-Saving Initiatives. J Craniofac Surg 2021; 32:2215-2216. [PMID: 33770050 DOI: 10.1097/scs.0000000000007625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Arnold J, Sarkar K, Smith D. 3D printed bismuth oxide-polylactic acid composites for radio-mimetic computed tomography spine phantoms. J Biomed Mater Res B Appl Biomater 2020; 109:789-796. [PMID: 33103853 DOI: 10.1002/jbm.b.34744] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 09/03/2020] [Accepted: 10/12/2020] [Indexed: 11/08/2022]
Abstract
Polylactic acid (PLA) composite filaments with varying concentrations of bismuth oxide microparticle additives were fabricated for use with commercially available fused filament fabrication (FFF) printing systems for the production of spine phantoms that mimic the radiopacity of bone. Thermal analysis showed that the additives had limited impact on the glass transition temperature and melting point of the filaments, allowing for their use in commercial FFF systems with standard printer settings. The ultimate strength of the printed test specimens was found to reduce slightly when bismuth oxide was added in high concentrations, with a moderate reduction of 12% compared to PLA at the highest concentration of 30 wt%. The modulus of the specimens increased by up to 24% with the addition of the additive. The radiopacity of specimens printed with the composite filaments were measured by X-ray microcomputed tomography (micro-CT) and clinical computed tomography (CT). The CT number was found to increase by approximately 196 HU per wt% of bismuth oxide added to the filaments. A phantom model of a cervical spine deformity was successfully printed by FFF with a composite filament which was calibrated to mimic the radiopacity of cervical and cortical bone. The results indicate that the composite filaments have direct applicability for the production of phantoms used for education and preoperative planning.
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Affiliation(s)
- John Arnold
- Department of Mechanical Engineering, University of New Orleans, New Orleans, Louisiana, USA
| | - Korak Sarkar
- Ochsner Neurosciences Medical 3D Lab, Ochsner Health, New Orleans, Louisiana, USA
| | - Damon Smith
- Department of Mechanical Engineering, University of New Orleans, New Orleans, Louisiana, USA
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Arce K, Morris JM, Alexander AE, Ettinger KS. Developing a Point-of-Care Manufacturing Program for Craniomaxillofacial Surgery. Atlas Oral Maxillofac Surg Clin North Am 2020; 28:165-179. [PMID: 32741513 DOI: 10.1016/j.cxom.2020.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kevin Arce
- Division of Oral and Maxillofacial Surgery, Section of Head and Neck Oncologic Surgery and Reconstruction, Department of Surgery, Mayo Clinic and Mayo College of Medicine, 200 First St. SW, Mail Code: RO_MA_12_03E-OS, Rochester, MN 55905, USA.
| | - Jonathan M Morris
- Division of Neuroradiology, Medical Director of Anatomic Modeling Lab, Department of Radiology, Mayo Clinic and Mayo College of Medicine, 200 First St. SW, Mail Code: RO_MA_02_48WRAD, Rochester, MN 55905, USA
| | - Amy E Alexander
- Anatomic Modeling Lab, Department of Radiology, Mayo Clinic, 200 First St. SW, Mail Code: RO_JO_06_201RAD, Rochester, MN 55905, USA
| | - Kyle S Ettinger
- Division of Oral and Maxillofacial Surgery, Section of Head and Neck Oncologic Surgery and Reconstruction, Department of Surgery, Mayo Clinic and Mayo College of Medicine, 200 First St. SW, Mail Code: RO_MA_12_03E-OS, Rochester, MN 55905, USA
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Wang E, Durham JS, Anderson DW, Prisman E. Clinical evaluation of an automated virtual surgical planning platform for mandibular reconstruction. Head Neck 2020; 42:3506-3514. [DOI: 10.1002/hed.26404] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/12/2020] [Accepted: 07/14/2020] [Indexed: 01/14/2023] Open
Affiliation(s)
- Edward Wang
- Division of Otolaryngology, Department of Surgery University of British Columbia, Gordon and Leslie Diamond Health Care Centre Vancouver British Columbia Canada
| | - J. Scott Durham
- Division of Otolaryngology, Department of Surgery University of British Columbia, Gordon and Leslie Diamond Health Care Centre Vancouver British Columbia Canada
| | - Donald W. Anderson
- Division of Otolaryngology, Department of Surgery University of British Columbia, Gordon and Leslie Diamond Health Care Centre Vancouver British Columbia Canada
| | - Eitan Prisman
- Division of Otolaryngology, Department of Surgery University of British Columbia, Gordon and Leslie Diamond Health Care Centre Vancouver British Columbia Canada
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Full-Digital Workflow for Fabricating a Custom-Made Direct Metal Laser Sintering (DMLS) Mandibular Implant: A Case Report. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17082693. [PMID: 32295196 PMCID: PMC7215385 DOI: 10.3390/ijerph17082693] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/07/2020] [Accepted: 04/08/2020] [Indexed: 12/20/2022]
Abstract
Direct Laser Metal Sintering (DLMS) is an additive manufacturing (AM) technique that is capable of manufacturing metal parts according to a three-dimensional (3D) design made using computer-assisted-design (CAD) software, thanks to a powerful laser beam that melts selectively micro-powder layers, one on top of the other, until the desired object is generated. With DMLS, it is now possible to fabricate custom-made titanium implants for oral and maxillofacial applications. We present the case of a 67-year-old woman diagnosed with a squamous cell carcinoma of the mandible. The patient underwent subtotal mandibular resection; conventional reconstruction procedures failed to rehabilitate the function of the mandible. A prosthesis replacing the resected mandible was designed and fabricated using a digital workflow. The extensive bone defect was rehabilitated with a prosthesis replacing the mandibular bone and supporting a morse-taper dental prosthesis. The masticatory function was reestablished.
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Lu T, Shao Z, Liu B, Wu T. Recent advance in patient-specific 3D printing templates in mandibular reconstruction. J Mech Behav Biomed Mater 2020; 106:103725. [PMID: 32250956 DOI: 10.1016/j.jmbbm.2020.103725] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 02/22/2020] [Accepted: 03/01/2020] [Indexed: 11/16/2022]
Abstract
Patient-specific 3D printing template is used in mandibular defect reconstruction with multiple deficiencies. During the operation, the template can accurately transfer the preoperative design, assisting surgeons to complete the surgery with high efficiency and accuracy. The template design has been continuously improved to obtain good application for miscellaneous classification and description. This review attempted to preliminarily analyse and summarise recent advancements in personalized 3D printing templates in mandibular reconstruction from the aspects of functional classification, existing problems, improved strategies and post-surgery evaluation by reviewing studies and through our combined clinical work and experience on hundreds of reconstruction surgeries.
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Affiliation(s)
- Tingwei Lu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, Wuhan University, Hubei Province, China; Department of Oral and Maxillofacial-Head & Neck Oncology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, PR China
| | - Zhe Shao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, Wuhan University, Hubei Province, China
| | - Bing Liu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, Wuhan University, Hubei Province, China.
| | - Tianfu Wu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, Wuhan University, Hubei Province, China.
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Shkedy Y, Howlett J, Wang E, Ongko J, Scott Durham J, Prisman E. Predicting the Number of Fibular Segments to Reconstruct Mandibular Defects. Laryngoscope 2019; 130:E619-E624. [PMID: 31886903 DOI: 10.1002/lary.28473] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/29/2019] [Accepted: 11/29/2019] [Indexed: 11/07/2022]
Abstract
OBJECTIVES Several classification schemes have been proposed to categorize mandibular defects following surgical resection; however, there is a paucity of data to guide an optimal reconstruction. This study examines the feasibility of using a geometric algorithm to simplify and determine the optimal reconstruction for a given mandibular defect. This algorithm is then applied to three different mandible defect classification schemes to correlate the defect type and number of bony segments required for reconstruction. METHODS Computed tomography (CT) scans of 48 mandibles were decomposed into curvilinear representations and analyzed using the Ramer-Douglas-Peucker algorithm. In total, 720 mandibular defects were created and subsequently analyzed utilizing three commonly referenced classification systems. For each defect, the number of bony segments required to reconstruct each defect was computed. RESULTS A wide variance in the number of segments needed for optimal reconstruction was observed across existing classifications. A six-segment total mandible reconstruction best reconstituted mandibular form in all 48 mandibles. CONCLUSION Defect classification schemes are not adaptable to predicting the number of fibula segments required for a given defect. Additionally, cephalometric templates may not be applicable in all clinical settings. The Ramer-Douglas-Peucker algorithm is well suited for providing case-specific predictions of reconstruction plans in a reproducible manner. LEVEL OF EVIDENCE IV Laryngoscope, 130:E619-E624, 2020.
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Affiliation(s)
- Yotam Shkedy
- Department of Otolaryngology-Head and Neck Surgery, Rambam Healthcare Campus, Haifa, Israel.,The Technion, Israel Institute of Technology, Haifa, Israel
| | - Joel Howlett
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Edward Wang
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jennifer Ongko
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - J Scott Durham
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Eitan Prisman
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
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