scholarly journals Accuracy of Patient-Specific Drilling Guides in Acetabular Fracture Surgery: A Human Cadaver Study

2021 ◽  
Vol 11 (8) ◽  
pp. 763
Author(s):  
Anne M. L. Meesters ◽  
Nick Assink ◽  
Kaj ten Duis ◽  
Eelco M. Fennema ◽  
Joep Kraeima ◽  
...  
Keyword(s):  
Acetabular Fracture ◽  
Preoperative Planning ◽  
Soft Tissue Injuries ◽  
Ct Scans ◽  
Screw Placement ◽  
Patient Specific ◽  
Surgical Guides ◽  
Entry Points ◽  
3D Printed ◽  
Fracture Surgery

Due to the complex anatomical shape of the pelvis, screw placement can be challenging in acetabular fracture surgery. This study aims to assess the accuracy of screw placement using patient-specific surgical drilling guides applied to pre-contoured conventional implants in acetabular fracture surgery. CT scans were made of four human cadavers to create 3D models of each (unfractured) pelvis. Implants were pre-contoured on 3D printed pelvic models and optically scanned. Following virtual preoperative planning, surgical drilling guides were designed to fit on top of the implant and were 3D printed. The differences between the pre-planned and actual screw directions (degrees) and screw entry points (mm) were assessed from the pre- and postoperative CT-scans. The median difference between the planned and actual screw direction was 5.9° (IQR: 4–8°) for the in-plate screws and 7.6° (IQR: 6–10°) for the infra-acetabular and column screws. The median entry point differences were 3.6 (IQR: 2–5) mm for the in-plate screws and 2.6 (IQR: 2–3) mm for the infra-acetabular and column screws. No screws penetrated into the hip joint or caused soft tissue injuries. Three-dimensional preoperative planning in combination with surgical guides that envelope pre-contoured conventional implants result in accurate screw placement during acetabular fracture surgery.

Is Preoperative Planning for Hip Surgery Using Three-Dimensional Printed Models Associated with Improved Intra- and Postoperative Outcomes? A Systematic Review

2019 ◽  
Vol 03 (03) ◽  
pp. 151-160
Author(s):  
Michael J. Mosca ◽  
Pablo Castañeda
Keyword(s):  
3D Printing ◽  
Clinical Outcomes ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
Postoperative Outcomes ◽  
Hip Surgery ◽  
Patient Specific ◽  
Original Research ◽  
Surgical Guides ◽  
3D Printed

AbstractUse of three-dimensional (3D) printed models for preoperative planning, patient-specific surgical guides, and implants in orthopaedic surgery is a burgeoning technology. It has not been established if 3D-printed models for preoperative planning are associated with improved clinical outcomes or if they are cost-effective for hip surgeries including total hip arthroplasty (THA), periacetabular osteotomy (PAO), proximal femoral osteotomy (PFO), and/or hip fractures. The purpose of this study was to conduct a systematic search and literature review to determine if preoperative planning for hip surgery using 3D-printed models was associated with improved intra- and postoperative outcomes. Specific aims were to determine the (1) types of applications and studies conducted, (2) types of 3D printing/materials used, (3) specific outcomes evaluated, (4) efficacy of 3D printing in planning for hip surgery, and (5) limitations of current research. The authors searched Medline, Embase, Cochrane Database of Systematic Reviews, CINAHL, and PubMed from inception through July 2017. Original research publications were included if the primary purpose was to evaluate 3D-printed models' ability to assist with the planning of hip surgeries. Papers were excluded if they were reviews, abstracts, and not available in English, their models were not patient-specific, or their research did not evaluate surgery of the acetabulofemoral joint or pelvis. Of the 3,369 unique papers identified, 21 met inclusion criteria after full-text review. Among the included studies, six evaluated 3D printing in THA, seven in PAO/PFO, and eight in fracture repairs/reconstruction. The research included nine case reports, three case series, one retrospective uncontrolled study, six prospective uncontrolled studies, and two prospective controlled studies. 3D printed models resulted in: reduced intraoperative improvisation, operating room time, blood loss/transfusions, improved positioning of plates/screws/implants, clinical scores, measures of realignment, and functional status. Recent innovations in 3D printing are promising but unproven to improve clinical outcomes in hip surgeries due to limitations of published research. This may impact utilization and reimbursement of 3D-printed models in hip surgery. Studies of resource utilization, cost-effectiveness, and controlled trials with standardized methods and clinical outcomes of relevance are needed.

scholarly journals 3D-printed, patient-specific DIEP flap templates for preoperative planning in breast reconstruction: a prospective case series

Gland Surgery ◽  
2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Michael P. Chae ◽  
David J. Hunter-Smith ◽  
Ru Dee Chung ◽  
Julian A. Smith ◽  
Warren Matthew Rozen
Keyword(s):  
Breast Reconstruction ◽  
Preoperative Planning ◽  
Case Series ◽  
Patient Specific ◽  
Diep Flap ◽  
3D Printed ◽  
Prospective Case Series

Computer-assisted extra-articular distal radius osteotomies using patient-specific surgical guides

10.29007/svbd ◽  
2018 ◽  
Author(s):  
Vasilii Shishkin ◽  
Valeriy Golubev
Keyword(s):  
Distal Radius ◽  
Patient Specific ◽  
Control Group ◽  
Computer Assisted ◽  
X Ray ◽  
Surgical Guides ◽  
Planning Approach ◽  
3D Printed ◽  
Planning Group

Malunions of the distal radius are often treated with correction osteotomies, which can be challenging to perform.In this report, 23 patients with symptomatic distal radius malunions were treated using 3D printed patient-specific surgical guides to facilitate surgery. Patients were compared with a control group of 23 patients that underwent similar surgery with a conventional x-ray planning approach.Postoperatively all patients in the computer-assisted group showed recovery of ROM, with no anatomical abnormalities on x-ray examination. 6 patients in the conventional planning group had reduced ROM with a residual volar tilt on x-ray images.Computer-assisted planning with the use of 3D printed patient-specific surgical guides enhances results of corrective osteotomies of distal radius malunions.

scholarly journals Augmented Reality, Surgical Navigation, and 3D Printing for Transcanal Endoscopic Approach to the Petrous Apex

OTO Open ◽  
2018 ◽  
Vol 2 (4) ◽  
pp. 2473974X1880449 ◽  
Author(s):  
Samuel R. Barber ◽  
Kevin Wong ◽  
Vivek Kanumuri ◽  
Ruwan Kiringoda ◽  
Judith Kempfle ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Skull Base ◽  
Surgical Planning ◽  
Preoperative Planning ◽  
Endoscopic Approach ◽  
Physical Models ◽  
Petrous Apex ◽  
Patient Specific ◽  
Lateral Skull Base ◽  
3D Printed

Otolaryngologists increasingly use patient-specific 3-dimensional (3D)–printed anatomic physical models for preoperative planning. However, few reports describe concomitant use with virtual models. Herein, we aim to (1) use a 3D-printed patient-specific physical model with lateral skull base navigation for preoperative planning, (2) review anatomy virtually via augmented reality (AR), and (3) compare physical and virtual models to intraoperative findings in a challenging case of a symptomatic petrous apex cyst. Computed tomography (CT) imaging was manually segmented to generate 3D models. AR facilitated virtual surgical planning. Navigation was then coupled to 3D-printed anatomy to simulate surgery using an endoscopic approach. Intraoperative findings were comparable to simulation. Virtual and physical models adequately addressed details of endoscopic surgery, including avoidance of critical structures. Complex lateral skull base cases may be optimized by surgical planning via 3D-printed simulation with navigation. Future studies will address whether simulation can improve patient outcomes.

Development of Life-Size Patient-Specific 3D-Printed Dural Venous Models for Preoperative Planning

2018 ◽  
Vol 110 ◽  
pp. e141-e149 ◽  
Author(s):  
Figen Govsa ◽  
Asli Beril Karakas ◽  
Mehmet Asim Ozer ◽  
Cenk Eraslan
Keyword(s):  
Preoperative Planning ◽  
Patient Specific ◽  
3D Printed

scholarly journals 3D printed patient-specific bone models for anatomy education from medical imaging

2021 ◽  
Author(s):  
Arivazhagan Pugalendhi ◽  
◽  
SenthilMurugan Arumugam ◽  
Rajesh Ranganathan ◽  
Sivakumar Ganesan ◽  
...  
Keyword(s):  
3D Printing ◽  
Surgical Planning ◽  
Thin Layers ◽  
Physical Models ◽  
Patient Specific ◽  
Anatomy Education ◽  
Healthcare Applications ◽  
Surgical Guides ◽  
Solid Objects ◽  
3D Printed

Evolution of 3D printing from medical image datasets are escalating and has widespread in healthcare applications such as anatomical models, surgical guides, and customized implants. In 3D printing, solid objects are fabricated by the frequently added the thin layers of material as per the digital model. This paper demonstrates the fabrication of 3D printed patient-specific bone models of leg and ankle foot from Digital Imaging and Communications in Medicine (DICOM) files. Processing of DICOM file is prepared by D2P (DICOM to PRINT) software and physical models are produced by Stratasys uPrint 3D printer. This 3D printed anatomical model eliminates the requirement of actual human bones, significance of preservation and mistakes in assembly of bones. The results of the study not only encourage education, surgical planning and validating medical devices but stimulate exciting innovations.

scholarly journals Accuracy Assessment of Pedicle and Lateral Mass Screw Insertion Assisted by Customized 3D-Printed Drill Guides: A Human Cadaver Study

2018 ◽  
Vol 16 (1) ◽  
pp. 94-102 ◽  
Author(s):  
Peter A J Pijpker ◽  
Joep Kraeima ◽  
Max J H Witjes ◽  
D L Marinus Oterdoom ◽  
Maarten H Coppes ◽  
...  
Keyword(s):  
Thoracic Spine ◽  
Patient Specific ◽  
Lateral Mass ◽  
Lateral Mass Screw ◽  
Upper Thoracic Spine ◽  
Screw Insertion ◽  
Drill Guide ◽  
Entry Points ◽  
3D Printed ◽  
Upper Thoracic

Abstract BACKGROUND Accurate cervical screw insertion is of paramount importance considering the risk of damage to adjacent vital structures. Recent research in 3-dimensional (3D) technology describes the advantage of patient-specific drill guides for accurate screw positioning, but consensus about the optimal guide design and the accuracy is lacking. OBJECTIVE To find the optimal design and to evaluate the accuracy of individualized 3D-printed drill guides for lateral mass and pedicle screw placement in the cervical and upper thoracic spine. METHODS Five Thiel-embalmed human cadavers were used for individualized drill-guide planning of 86 screw trajectories in the cervical and upper thoracic spine. Using 3D bone models reconstructed from acquired computed tomography scans, the drill guides were produced for both pedicle and lateral mass screw trajectories. During the study, the initial minimalistic design was refined, resulting in the advanced guide design. Screw trajectories were drilled and the realized trajectories were compared to the planned trajectories using 3D deviation analysis. RESULTS The overall entry point and 3D angular accuracy were 0.76 ± 0.52 mm and 3.22 ± 2.34°, respectively. Average measurements for the minimalistic guides were 1.20 mm for entry points, 5.61° for the 3D angulation, 2.38° for the 2D axial angulation, and 4.80° for the 2D sagittal angulation. For the advanced guides, the respective measurements were 0.66 mm, 2.72°, 1.26°, and 2.12°, respectively. CONCLUSION The study ultimately resulted in an advanced guide design including caudally positioned hooks, crosslink support structure, and metal inlays. The novel advanced drill guide design yields excellent drilling accuracy.

Accuracy of Placement of Pedicle Screws in the Lumbosacral Region of Dogs Using 3D-Printed Patient-Specific Drill Guides

2020 ◽  
Author(s):  
Cristina Toni ◽  
Bill Oxley ◽  
Stephen Clarke ◽  
Sebastien Behr
Keyword(s):  
Cauda Equina ◽  
Three Dimensional ◽  
Clinical Signs ◽  
Pedicle Screws ◽  
Screw Placement ◽  
Patient Specific ◽  
Inclusion Criteria ◽  
Lumbosacral Region ◽  
Dorsal Stabilization ◽  
3D Printed

Abstract Objective The aim of this study was to report the accuracy of pedicle screw placement using three-dimensional (3D)-printed, patient-specific drill guides in the lumbosacral region of dogs. Study Design This was a retrospective study. Thirty-two pedicle screws were placed in five dogs. Medical records were reviewed between November 2015 and November 2018 for dogs showing clinical signs associated with cauda equina syndrome. Inclusion criteria included preoperative magnetic resonance imaging, pre- and postoperative computed tomography (CT) and dorsal stabilization, with pedicle screws placed using 3D-printed, patient-specific drill guides and polymethylmethacrylate. Screw placement was evaluated for medial or lateral breaching on postoperative CT. Results Five dogs met the inclusion criteria. Four had degenerative lumbosacral stenosis and one had discospondylitis. All dogs had failed medical management prior to surgery. Of 32 bicortical pedicle screws placed, 30 were fully contained inside the pedicle and 2 were partially breaching the vertebral canal (less than one-third of the screw diameter). Postoperative CT revealed good alignment of L7-S1 in all planes. Conclusions This technique enabled an accurate and safe placement of pedicle screws in the lumbosacral region of dogs with lumbosacral disease. Three-dimensional, printed patient-specific drill guides are a safe and effective method of placing pedicle screws in dogs with lumbosacral disease.

Sign in / Sign up

Export Citation Format

Share Document