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Taghvaei M, Taheri M, Sadighi A, Zegarski R, Schaer TP, Palmese GR, Najafi AR, Siegler S. Fixation strength of swelling copolymeric anchors in artificial bone. J Orthop Res 2024; 42:1223-1230. [PMID: 38111190 DOI: 10.1002/jor.25770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 12/05/2023] [Accepted: 12/12/2023] [Indexed: 12/20/2023]
Abstract
Fixation with suture anchors and metallic hardware for osteosynthesis is common in orthopedic surgeries. Most metallic commercial bone anchors achieve their fixation to bone through shear of the bone located between the threads. They have several deficiencies, including stress-shielding due to mechanical properties mismatch, generation of acidic by-products, poor osteointegration, low mechanical strength and catastrophic failure often associated with large bone defects that may be difficult to repair. To overcome these deficiencies, a swelling porous copolymeric material, to be used as bone anchors with osteointegration potential, was introduced. The purpose of this study was to investigate the fixation strength of these porous, swelling copolymeric bone anchors in artificial bone of various densities. The pull-out and subsidence studies indicate an effective fixation mechanism based on friction including re-fixation capabilities, and minimization of damage following complete failure. The study suggests that this swelling porous structure may provide an effective alternative to conventional bone anchors, particularly in low-density bone.
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Affiliation(s)
- Moein Taghvaei
- School of Biomedical Engineering, Drexel University, Philadelphia, Pennsylvania, USA
| | - Mehrangiz Taheri
- Department of Mechanical Engineering, Drexel University, Philadelphia, Pennsylvania, USA
| | - Amirreza Sadighi
- Department of Mechanical Engineering, Drexel University, Philadelphia, Pennsylvania, USA
| | - Ryan Zegarski
- Department of Mechanical Engineering, Drexel University, Philadelphia, Pennsylvania, USA
| | - Thomas P Schaer
- School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | | | - Ahmad R Najafi
- Department of Mechanical Engineering, Drexel University, Philadelphia, Pennsylvania, USA
| | - Sorin Siegler
- Department of Mechanical Engineering, Drexel University, Philadelphia, Pennsylvania, USA
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Kang KS, Park KM, Ahn JW, Jo MY, Oh YR, Youn JH, Lee JW, Je DY, Jung TG. Validation of the Finite Element Model versus Biomechanical Assessments of Dental Implants and Total Knee Replacements. Bioengineering (Basel) 2023; 10:1365. [PMID: 38135955 PMCID: PMC10740907 DOI: 10.3390/bioengineering10121365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/17/2023] [Accepted: 11/23/2023] [Indexed: 12/24/2023] Open
Abstract
Computer modeling and simulation (CM&S) technology is widely used in the medical device industry due to its advantages such as reducing testing time and costs. However, the developer's parameter settings during the modeling and simulation process can have a significant impact on the results. This study developed a test model for the rotational shear strength of dental implants and the constraint force of total knee replacements based on CM&S technology and proposes ideal parameters to ensure reliability. For dental implants, the load area and sliding contact conditions were considered, and for total knee replacements, the friction coefficient, medial-lateral displacement, valgus-varus rotation, and elastic modulus were considered. By comparing the simulation results and mechanical tests, boundary conditions with an error rate of less than 1.5% were selected. When a jig (gripper and collector) was applied with the same boundary conditions, an error rate of 48~22% occurred; otherwise, it was confirmed that the error rate was within 10~0.2%. The FE model was verified with an error of 2.49 to 3% compared to the mechanical test. The friction coefficient variable had the greatest influence on the results, accounting for 10 to 13%, and it was confirmed that valgus-varus rotation had a greater influence on the results than medial-lateral displacement. Relatively, the elastic modulus of the insert had the least effect on the results. These research results are expected to make CM&S techniques useful as a medical device digital development tool (M3DT) in the development of total knee replacements and dental implants.
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Affiliation(s)
- Kwan-Su Kang
- Medical Device Development Center, Osong Medical Innovation Foundation, Cheongju-si 28160, Republic of Korea; (K.-S.K.); (K.-M.P.); (J.-W.A.)
- Department of Biomedical Engineering, School of Medicine, Chungbuk National University, Cheongju-si 28644, Republic of Korea
| | - Kwang-Min Park
- Medical Device Development Center, Osong Medical Innovation Foundation, Cheongju-si 28160, Republic of Korea; (K.-S.K.); (K.-M.P.); (J.-W.A.)
| | - Jin-Woo Ahn
- Medical Device Development Center, Osong Medical Innovation Foundation, Cheongju-si 28160, Republic of Korea; (K.-S.K.); (K.-M.P.); (J.-W.A.)
| | - Min-Young Jo
- Department of Biomedical Engineering, College of Biomedical Science & Engineering, Inje University, Gimhae-si 50834, Republic of Korea; (M.-Y.J.); (Y.-R.O.); (J.-H.Y.); (J.-W.L.); (D.-Y.J.)
| | - Yu-Rim Oh
- Department of Biomedical Engineering, College of Biomedical Science & Engineering, Inje University, Gimhae-si 50834, Republic of Korea; (M.-Y.J.); (Y.-R.O.); (J.-H.Y.); (J.-W.L.); (D.-Y.J.)
| | - Jin-Ho Youn
- Department of Biomedical Engineering, College of Biomedical Science & Engineering, Inje University, Gimhae-si 50834, Republic of Korea; (M.-Y.J.); (Y.-R.O.); (J.-H.Y.); (J.-W.L.); (D.-Y.J.)
| | - Jeong-Woo Lee
- Department of Biomedical Engineering, College of Biomedical Science & Engineering, Inje University, Gimhae-si 50834, Republic of Korea; (M.-Y.J.); (Y.-R.O.); (J.-H.Y.); (J.-W.L.); (D.-Y.J.)
| | - Dong-Young Je
- Department of Biomedical Engineering, College of Biomedical Science & Engineering, Inje University, Gimhae-si 50834, Republic of Korea; (M.-Y.J.); (Y.-R.O.); (J.-H.Y.); (J.-W.L.); (D.-Y.J.)
| | - Tae-Gon Jung
- Medical Device Development Center, Osong Medical Innovation Foundation, Cheongju-si 28160, Republic of Korea; (K.-S.K.); (K.-M.P.); (J.-W.A.)
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