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Zheng H, Feng E, Xiao Y, Liu X, Lai T, Xu Z, Chen J, Xie S, Lin F, Zhang Y. Is AI 3D-printed PSI an accurate option for patients with developmental dysplasia of the hip undergoing THA? BMC Musculoskelet Disord 2024; 25:308. [PMID: 38649919 PMCID: PMC11034034 DOI: 10.1186/s12891-024-07449-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 04/16/2024] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND In traditional surgical procedures, significant discrepancies are often observed between the pre-planned templated implant sizes and the actual sizes used, particularly in patients with congenital hip dysplasia. These discrepancies arise not only in preoperative planning but also in the precision of implant placement, especially concerning the acetabular component. Our study aims to enhance the accuracy of implant placement during Total Hip Arthroplasty (THA) by integrating AI-enhanced preoperative planning with Patient-Specific Instrumentation (PSI). We also seek to assess the accuracy and clinical outcomes of the AI-PSI (AIPSI) group in comparison to a manual control group. METHODS This study included 60 patients diagnosed with congenital hip dysplasia, randomly assigned to either the AIPSI or manual group, with 30 patients in each. No significant demographic differences between were noted the two groups. A direct anterior surgical approach was employed. Postoperative assessments included X-rays and CT scans to measure parameters such as the acetabular cup anteversion angle, acetabular cup inclination angle, femoral stem anteversion angle, femoral offset, and leg length discrepancy. Functional scores were recorded at 3 days, 1 week, 4 weeks, and 12 weeks post-surgery. Data analysis was conducted using SPSS version 22.0, with the significance level was set at α = 0.05. RESULTS AND CONCLUSION The AIPSI group demonstrated greater prosthesis placement accuracy. With the aid of PSI, AI-planned THA surgery provides surgeons with enhanced precision in prosthesis positioning. This approach potentially offers greater insights and guidelines for managing more complex anatomical variations or cases.
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Affiliation(s)
- Han Zheng
- Department of Arthrosis Surgery, Fuzhou Second Hospital, Fuzhou, China
- The Second School of Medicine, Fujian University of Traditional Chinese, Fujian, China
| | - Eryou Feng
- Department of Arthrosis Surgery, Fuzhou Second Hospital, Fuzhou, China.
- Fujian Provincial Clinical Medical Research Center for First Aid and Rehabilitation in Orthopaedic Trauma(2020Y2014), Fuzhou, China.
| | - Yao Xiao
- Fuzhou Changle Hospital of Traditional Chinese Medicine, Fuzhou, China
| | - Xingyu Liu
- Longwood Valley Medical Technology Co Ltd, Beijing, China
| | - Tianyu Lai
- Department of Arthrosis Surgery, Fuzhou Second Hospital, Fuzhou, China
| | - Zhibiao Xu
- Department of Arthrosis Surgery, Fuzhou Second Hospital, Fuzhou, China
| | - Jingqiao Chen
- Department of Arthrosis Surgery, Fuzhou Second Hospital, Fuzhou, China
| | - Shiwei Xie
- Department of Arthrosis Surgery, Fuzhou Second Hospital, Fuzhou, China
| | - Feitai Lin
- Department of Arthrosis Surgery, Fuzhou Second Hospital, Fuzhou, China
| | - Yiling Zhang
- Longwood Valley Medical Technology Co Ltd, Beijing, China.
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2
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D'Amelio A, Van Lieshout EMM, Wakker AM, Verhofstad MHJ, Van Vledder MG. 3D-printed patient specific instruments for corrective osteotomies of the lower extremity. Injury 2022; 53 Suppl 3:S53-S58. [PMID: 36075778 DOI: 10.1016/j.injury.2022.08.069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 08/14/2022] [Accepted: 08/15/2022] [Indexed: 02/02/2023]
Abstract
3D-printing has become a promising adjunct in orthopedic surgery over the past years. A significant drop in costs and increased availability of the required hardware and software needed for using the technique, have resulted in a relatively fast adaptation of 3D-printing techniques for various indications. In this review, the role of 3D-printing for deformity corrections of the lower extremity is described.
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Affiliation(s)
- Andrea D'Amelio
- Trauma Research Unit Department of Surgery, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, the Netherlands; S.C. Ortopedia e Traumatologia 1 U, AOU Città della Salute e della Scienza di torino, Ospedale C.T.O., Via Zuretti 29, 10126 Torino, Italy
| | - Esther M M Van Lieshout
- Trauma Research Unit Department of Surgery, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, the Netherlands
| | - Alexander M Wakker
- Trauma Research Unit Department of Surgery, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, the Netherlands
| | - Michael H J Verhofstad
- Trauma Research Unit Department of Surgery, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, the Netherlands
| | - Mark G Van Vledder
- Trauma Research Unit Department of Surgery, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, the Netherlands.
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Vendries V, Ungi T, Harry J, Kunz M, Podlipská J, MacKenzie L, Venne G. Three-dimensional ultrasound for knee osteophyte depiction: a comparative study to computed tomography. Int J Comput Assist Radiol Surg 2021; 16:1749-1759. [PMID: 34313914 PMCID: PMC8580923 DOI: 10.1007/s11548-021-02456-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 07/06/2021] [Indexed: 11/29/2022]
Abstract
Purpose Osteophytes are common radiographic markers of osteoarthritis. However, they are not accurately depicted using conventional imaging, thus hampering surgical interventions that rely on pre-operative images. Studies have shown that ultrasound (US) is promising at detecting osteophytes and monitoring the progression of osteoarthritis. Furthermore, three-dimensional (3D) ultrasound reconstructions may offer a means to quantify osteophytes. The purpose of this study was to compare the accuracy of osteophyte depiction in the knee joint between 3D US and conventional computed tomography (CT). Methods Eleven human cadaveric knees were pre-screened for the presence of osteophytes. Three osteoarthritic knees were selected, and then, 3D US and CT images were obtained, segmented, and digitally reconstructed in 3D. After dissection, high-resolution structured light scanner (SLS) images of the joint surfaces were obtained. Surface matching and root mean square (RMS) error analyses of surface distances were performed to assess the accuracy of each modality in capturing osteophytes. The RMS errors were compared between 3D US, CT and SLS models. Results Average RMS error comparisons for 3D US versus SLS and CT versus SLS models were 0.87 mm ± 0.33 mm (average ± standard deviation) and 0.95 mm ± 0.32 mm, respectively. No statistical difference was found between 3D US and CT. Comparative observations of imaging modalities suggested that 3D US better depicted osteophytes with cartilage and fibrocartilage tissue characteristics compared to CT. Conclusion Using 3D US can improve the depiction of osteophytes with a cartilaginous portion compared to CT. It can also provide useful information about the presence and extent of osteophytes. Whilst algorithm improvements for automatic segmentation and registration of US are needed to provide a more robust investigation of osteophyte depiction accuracy, this investigation puts forward the potential application for 3D US in routine diagnostic evaluations and pre-operative planning of osteoarthritis.
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Affiliation(s)
- Valeria Vendries
- Anatomical Sciences Program and Department of Biomedical and Molecular Sciences, Queens University, Kingston, ON, K7L3 N6, Canada.
| | - Tamas Ungi
- School of Computing, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Jordan Harry
- Anatomical Sciences Program and Department of Biomedical and Molecular Sciences, Queens University, Kingston, ON, K7L3 N6, Canada
| | - Manuela Kunz
- School of Computing, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Jana Podlipská
- Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Les MacKenzie
- Anatomical Sciences Program and Department of Biomedical and Molecular Sciences, Queens University, Kingston, ON, K7L3 N6, Canada
| | - Gabriel Venne
- Department of Anatomy and Cell Biology, McGill University, Montreal, QC, H3A 0G4, Canada
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Sta S, Ogor J, Letissier H, Stindel E, Hamitouche C, Dardenne G. Towards markerless computer assisted surgery: Application to total knee arthroplasty. Int J Med Robot 2021; 17:e2296. [PMID: 34085387 DOI: 10.1002/rcs.2296] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 05/25/2021] [Accepted: 06/01/2021] [Indexed: 11/10/2022]
Abstract
PURPOSE A new approach is proposed to localise surgical instruments for Computer Assisted Orthopaedic Surgery (CAOS) that aims at overpassing the limitations of conventional CAOS solutions. This approach relies on both a depth sensor and a 6D pose estimation algorithm. METHODS The Point-Pair Features (PPF) algorithm was used to estimate the pose of a Patient-Specific Instrument (PSI) for Total Knee Arthroplasty (TKA). Four depth sensors have been compared. Three scores have been computed to assess the performances: The Depth Fitting Error (DFE), the Pose Errors, and the Success Rate. RESULTS The obtained results demonstrate higher performances for the Microsoft Kinect Azure in terms of DFE. The Occipital Structure core shows better behavior in terms of Pose Errors and Success Rate. CONCLUSION This comparative study presents the first depth-sensor based solution allowing the intraoperative markerless localization of surgical instruments in orthopedics.
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Affiliation(s)
- Salaheddine Sta
- IMT-Atlantique Bretagne- Pays de la Loire, Brest, France.,LaTIM, INSERM, SFR IBSAM, Brest, France
| | | | - Hoel Letissier
- LaTIM, INSERM, SFR IBSAM, Brest, France.,Université de Bretagne Occidentale (UBO), Brest, France.,CHU Brest, Brest, France
| | - Eric Stindel
- LaTIM, INSERM, SFR IBSAM, Brest, France.,Université de Bretagne Occidentale (UBO), Brest, France.,CHU Brest, Brest, France
| | - Chafiaa Hamitouche
- IMT-Atlantique Bretagne- Pays de la Loire, Brest, France.,LaTIM, INSERM, SFR IBSAM, Brest, France
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Yan L, Wang P, Zhou H. 3D Printing Navigation Template Used in Total Hip Arthroplasty for Developmental Dysplasia of the Hip. Indian J Orthop 2020; 54:856-862. [PMID: 33133409 PMCID: PMC7572928 DOI: 10.1007/s43465-020-00093-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Accepted: 03/18/2020] [Indexed: 02/04/2023]
Abstract
BACKGROUND The purpose of our study was to explore the feasibility of 3D printing navigation template used in total hip arthroplasty (THA) for adult developmental dysplasia of the hip (DDH). MATERIALS AND METHODS 25 patients who received THA for DDH from February 2014 to May 2018 were randomized into the control or intervention group. Of these patients, 12 received THAs assisted with 3D printing navigation templates, 13 THAs underwent THAs without navigation templates. The mean follow-up was 1.6 (range, 1.2-3.8) years. Clinical scores and radiographic results were evaluated for two groups. RESULTS Operating time, intra- and postoperative hemorrhage and Harris Hip Score (HHS) at 6 months postoperatively in the 3D printing group were better than those for patients in the conventional hip replacement group, while infection and implant loosening were 0 in the two groups. There were no significant differences in anteversion angle, abduction angle and the distance from rotation center to the ischial tuberosity line in 3D printing group as compared to the normal side. The abduction angle and the distance from rotation center to the ischial tuberosity line were significantly different between the two sides in the traditional group. CONCLUSION Application of the 3D printing template for THA with DDH can facilitate the surgical procedure and create an ideal artificial acetabulum placement.
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Affiliation(s)
- Liang Yan
- grid.263761.70000 0001 0198 0694Department of Orthopedics, The Second Affiliate Hospital of Soochow University, Soochow, 215000 Jiangsu China ,Department of Orthopedics, Nantong Rich Hospital, Nantong, 226300 Jiangsu China
| | - Peng Wang
- Department of Orthopedics, Nantong Rich Hospital, Nantong, 226300 Jiangsu China
| | - Haibin Zhou
- grid.263761.70000 0001 0198 0694Department of Orthopedics, The Second Affiliate Hospital of Soochow University, Soochow, 215000 Jiangsu China
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Abstract
Surgeons and engineers constantly search for methods to improve the surgical positioning of implants used for joint arthroplasty. Rapid prototyping is being used to develop patient-specific instrumentation (PSI) and has already been successfully translated into large-scale clinical use for knee arthroplasty. PSI has been used in shoulder arthroplasty; however, it is not yet known whether PSI provides improved accuracy and outcomes compared with conventional methods in either shoulder arthroplasty or knee arthroplasty. In the hip, PSI has been limited to the positioning of custom-manufactured implants and a small number of surgeons testing the emerging solutions from different manufacturers. Early results indicate consistent accurate positioning of implants with the use of PSI in hip arthroplasty but with added costs and uncertain effect on clinical outcomes.
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Electromagnetically tracked personalized templates for surgical navigation. Int J Comput Assist Radiol Surg 2017; 12:1049-1058. [PMID: 28332159 DOI: 10.1007/s11548-017-1563-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 03/13/2017] [Indexed: 10/19/2022]
Abstract
PURPOSE An electromagnetic (EM) surgical tracking system was developed for orthopedic navigation. The reportedly poor accuracy of point-based EM navigation was improved by using anatomical impressions, which were EM-tracked personalized templates. Lines, rather than points, were consistently used for calibration and error evaluation. METHODS Technical accuracy was tested using models derived from CT scans of ten cadaver shoulders. Tracked impressions were first designed, calibrated, and tested using lines as fiducial objects. Next, tracked impressions were tested against EM point-based navigation and optical point-based navigation, in environments that were either relatively empty or that included surgical instruments. Finally, a tracked impression was tested on a cadaver forearm in a simulated fracture-repair task. RESULTS Calibration of anatomical impressions to EM tracking was highly accurate, with mean fiducial localization errors in positions of 0.3 mm and in angles of [Formula: see text]. Technical accuracy on physical shoulder models was also highly accurate; in an EM field with surgical instruments, the mean of target registration errors in positions was 2.2 mm and in angles was [Formula: see text]. Preclinical accuracy in a cadaver forearm in positions was 0.4 mm and in angles was [Formula: see text]. The technical accuracy was significantly better than point-based navigation, whether by EM tracking or by optical tracking. The preclinical accuracy was comparable to that achieved by point-based optical navigation. CONCLUSIONS EM-tracked impressions-a hybrid of personalized templates and EM navigation-are a promising technology for orthopedic applications. The two technical contributions are the novel hybrid navigation and the consistent use of lines as fiducial objects, replacing traditional point-based computations. The accuracy improvement was attributed to the combination of physical surfaces and line directions in the processes of calibration and registration. The technical studies and preclinical trial suggest that EM-tracked impressions are an accurate, ergonomic innovation in image-guided orthopedic surgery.
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Zheng P, Xu P, Yao Q, Tang K, Lou Y. 3D-printed navigation template in proximal femoral osteotomy for older children with developmental dysplasia of the hip. Sci Rep 2017; 7:44993. [PMID: 28322290 PMCID: PMC5359566 DOI: 10.1038/srep44993] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 02/17/2017] [Indexed: 12/15/2022] Open
Abstract
To explore the feasibility of 3D-printed navigation template in proximal femoral varus rotation and shortening osteotomy for older children with developmental dysplasia of the hip (DDH). Between June 2014 and May 2015, navigation templates were designed and used for 12 DDH patients. Surgical information and outcomes were compared to 13 patients undergoing the same surgery but without navigation template. In template-guided patient group, operation time (21.08 min vs. 46.92 min), number of X-ray exposures (3.92 vs. 6.69), and occurrence of femoral epiphysis damage (0 vs. 0.92) were significantly decreased (P < 0.05). Furthermore, after 12–18 months follow-up, 66.7% and 16.7% of the hips in template-guided group were rated as excellent or good, respectively, according to the McKay criteria; 83.3% and 16.7% by using the Severin criteria respectively. By contrast, 46.2% and 23.1% of the hips in traditional operation group were classed as excellent or good, respectively, using the McKay criteria; 46.2% and 30.8% by using the Severin criteria respectively. The template-guided group achieved a better outcome; however, there was no significant difference. Application of the navigation template for older DDH children can reduce the operation time, radiation exposure, and epiphysis damage, which also simplifies surgery and improves precision.
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Affiliation(s)
- Pengfei Zheng
- Department of Pediatric Orthopaedics, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210008, China.,Digital Medicine Institute, Nanjing Medical University, Nanjing, Jiangsu, 210006, China
| | - Peng Xu
- Department of Pediatric Orthopaedics, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210008, China.,Digital Medicine Institute, Nanjing Medical University, Nanjing, Jiangsu, 210006, China
| | - Qingqiang Yao
- Digital Medicine Institute, Nanjing Medical University, Nanjing, Jiangsu, 210006, China.,Department of Orthopedics, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, 210006, China
| | - Kai Tang
- Department of Pediatric Orthopaedics, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210008, China.,Digital Medicine Institute, Nanjing Medical University, Nanjing, Jiangsu, 210006, China
| | - Yue Lou
- Department of Pediatric Orthopaedics, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210008, China.,Digital Medicine Institute, Nanjing Medical University, Nanjing, Jiangsu, 210006, China
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Application of computer-aided design and 3D-printed navigation template in Locking Compression Pediatric Hip Plate ΤΜ placement for pediatric hip disease. Int J Comput Assist Radiol Surg 2017; 12:865-871. [PMID: 28190127 DOI: 10.1007/s11548-017-1535-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 02/01/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND To investigate the feasibility and accuracy of a drill template based on computer-aided design (CAD) and 3D printing technology for the placement of screws in Locking Compression Pediatric Hip Plate (LCP-PHP). METHODS LCP-PHP was used in 11 children [5 with femoral neck fracture and 6 with development dysplasia of hip (DDH)]. Using the CT data, the proximal femur model was created by a 3D printer. Fracture reduction and the placement of the screw in the femoral neck and the LCP-PHP were simulated by the computer. The navigation template was designed by the software to match the proximal femur. After the feasibility of the 3D model operation was demonstrated before the operation, the guide pins and the screws were inserted with the help of the navigate template in the operation. RESULTS During surgery, the navigation template for each case was matched to the bony markers of the proximal femur. With the help of the template, in femoral neck fracture cases, three screws could be accurately inserted into the femoral neck to implant the LCP-PHP and stabilize the fracture. The template for DDH includes all operation parameters and steps for proximal femoral varus rotation and shortening osteotomy, which made the surgery much easier to perform. Radiographs taken after surgery showed that the postoperative results closely corresponded to the preoperative computer simulation. The average time taken for LCP-PHP placement was 26.5 min; radiography was used during surgery only for an average of 6.0 times. Postoperative radiographs showed good results. CONCLUSION With the use of CAD and 3D printing technology, accurate placement of individualized navigation template of LCP-PHP can be achieved. This technology can reduce intraoperative damage to the femoral neck epiphysis, decrease operation time, reduce intraoperative hemorrhage, and decrease radiation exposure to patients and personnel during the surgery.
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Tack P, Victor J, Gemmel P, Annemans L. 3D-printing techniques in a medical setting: a systematic literature review. Biomed Eng Online 2016; 15:115. [PMID: 27769304 PMCID: PMC5073919 DOI: 10.1186/s12938-016-0236-4] [Citation(s) in RCA: 547] [Impact Index Per Article: 68.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 10/09/2016] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Three-dimensional (3D) printing has numerous applications and has gained much interest in the medical world. The constantly improving quality of 3D-printing applications has contributed to their increased use on patients. This paper summarizes the literature on surgical 3D-printing applications used on patients, with a focus on reported clinical and economic outcomes. METHODS Three major literature databases were screened for case series (more than three cases described in the same study) and trials of surgical applications of 3D printing in humans. RESULTS 227 surgical papers were analyzed and summarized using an evidence table. The papers described the use of 3D printing for surgical guides, anatomical models, and custom implants. 3D printing is used in multiple surgical domains, such as orthopedics, maxillofacial surgery, cranial surgery, and spinal surgery. In general, the advantages of 3D-printed parts are said to include reduced surgical time, improved medical outcome, and decreased radiation exposure. The costs of printing and additional scans generally increase the overall cost of the procedure. CONCLUSION 3D printing is well integrated in surgical practice and research. Applications vary from anatomical models mainly intended for surgical planning to surgical guides and implants. Our research suggests that there are several advantages to 3D-printed applications, but that further research is needed to determine whether the increased intervention costs can be balanced with the observable advantages of this new technology. There is a need for a formal cost-effectiveness analysis.
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Affiliation(s)
- Philip Tack
- Department of Public Health, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium.
| | - Jan Victor
- Ghent University Hospital, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium
| | - Paul Gemmel
- Departement of Economics & Business Administration, Ghent University, Tweekerkenstraat 2, 9000, Ghent, Belgium
| | - Lieven Annemans
- Department of Public Health, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium
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Abstract
With advances in both medical imaging and computer programming, two-dimensional axial images can be processed into other reformatted views (sagittal and coronal) and three-dimensional (3D) virtual models that represent a patients’ own anatomy. This processed digital information can be analyzed in detail by orthopedic surgeons to perform patient-specific orthopedic procedures. The use of 3D printing is rising and has become more prevalent in medical applications over the last decade as surgeons and researchers are increasingly utilizing the technology’s flexibility in manufacturing objects. 3D printing is a type of manufacturing process in which materials such as plastic or metal are deposited in layers to create a 3D object from a digital model. This additive manufacturing method has the advantage of fabricating objects with complex freeform geometry, which is impossible using traditional subtractive manufacturing methods. Specifically in surgical applications, the 3D printing techniques can not only generate models that give a better understanding of the complex anatomy and pathology of the patients and aid in education and surgical training, but can also produce patient-specific surgical guides or even custom implants that are tailor-made to the surgical requirements. As the clinical workflow of the 3D printing technology continues to evolve, orthopedic surgeons should embrace the latest knowledge of the technology and incorporate it into their clinical practice for patient-specific orthopedic applications. This paper is written to help orthopedic surgeons stay up-to-date on the emerging 3D technology, starting from the acquisition of clinical imaging to 3D printing for patient-specific applications in orthopedics. It 1) presents the necessary steps to prepare the medical images that are required for 3D printing, 2) reviews the current applications of 3D printing in patient-specific orthopedic procedures, 3) discusses the potential advantages and limitations of 3D-printed custom orthopedic implants, and 4) suggests the directions for future development. The 3D printing technology has been reported to be beneficial in patient-specific orthopedics, such as in the creation of anatomic models for surgical planning, education and surgical training, patient-specific instruments, and 3D-printed custom implants. Besides being anatomically conformed to a patient’s surgical requirement, 3D-printed implants can be fabricated with scaffold lattices that may facilitate osteointegration and reduce implant stiffness. However, limitations including high cost of the implants, the lead time in manufacturing, and lack of intraoperative flexibility need to be addressed. New biomimetic materials have been investigated for use in 3D printing. To increase utilization of 3D printing technology in orthopedics, an all-in-one computer platform should be developed for easy planning and seamless communications among different care providers. Further studies are needed to investigate the real clinical efficacy of 3D printings in orthopedic applications.
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Affiliation(s)
- Kwok Chuen Wong
- Department of Orthopedics and Traumatology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong,
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Chan B, Auyeung J, Rudan JF, Ellis RE, Kunz M. Intraoperative application of hand-held structured light scanning: a feasibility study. Int J Comput Assist Radiol Surg 2016; 11:1101-8. [PMID: 27017498 DOI: 10.1007/s11548-016-1381-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 03/07/2016] [Indexed: 11/29/2022]
Abstract
PURPOSE Structured light scanning is an emerging technology that shows potential in the field of medical imaging and image-guided surgery. The purpose of this study was to investigate the feasibility of applying a hand-held structured light scanner in the operating theatre as an intraoperative image modality and registration tool. METHODS We performed an in vitro study with three fresh frozen knee specimens and a clinical pilot study with three patients (one total knee arthroplasty and two hip replacements). Before the procedure, a CT scan of the affected joint was obtained and isosurface models of the anatomies were created. A conventional surgical exposure was performed, and a hand-held structured light scanner (Artec Group, Palo Alto, USA) was used to scan the exposed anatomy. Using the texture information of the scanned model, bony anatomy was selected and registered to the CT models. Registration RMS errors were documented, and distance maps between the scanned model and the CT model were created. RESULTS For the in vitro trial, the average RMS error was 1.00 mm for the femur and 1.17 mm for the tibia registration. We found comparable results during clinical trials, with an average RMS error of 1.3 mm. CONCLUSIONS The results of this preliminary study indicate that structured light scanning could be applied accurately and safely in a surgical environment. This could result in a variety of applications for these scanners in image-guided interventions as intraoperative imaging and registration tools.
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Affiliation(s)
- Brandon Chan
- School of Computing, Queen's University, 557 Goodwin Hall, Kingston, ON, K7L 2N8, Canada
| | - Jason Auyeung
- Department of Biomedical and Molecular Sciences, Queen's University, Botterell Hall, 18 Stuart Street, Kingston, ON, K7L 3N6, Canada
| | - John F Rudan
- Department of Surgery, Queen's University, Kingston General Hospital, 76 Stuart Street, Kingston, ON, K7L 2V7, Canada
| | - Randy E Ellis
- School of Computing, Queen's University, 557 Goodwin Hall, Kingston, ON, K7L 2N8, Canada.,Department of Biomedical and Molecular Sciences, Queen's University, Botterell Hall, 18 Stuart Street, Kingston, ON, K7L 3N6, Canada.,Department of Surgery, Queen's University, Kingston General Hospital, 76 Stuart Street, Kingston, ON, K7L 2V7, Canada.,Department of Mechanical and Materials Engineering, Queen's University, McLaughlin Hall, Kingston, ON, K7L 3N6, Canada
| | - Manuela Kunz
- School of Computing, Queen's University, 557 Goodwin Hall, Kingston, ON, K7L 2N8, Canada. .,Human Mobility Research Centre, Queen's University and Kingston General Hospital, Kingston General Hospital, 76 Stuart Street, Kingston, Ontario, K7L 2V7, Canada.
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