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Preclinical evaluation of a surgical assistant robot for use in minimally invasive abdominal surgeries.
Biomed Eng Lett
January 2025
Colorectal Cancer Center, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea.
In recent years, robotic assistance has become increasingly used and applied in minimally invasive surgeries. A new cooperative surgical robot system that includes a joystick-guided robotic scope holder was developed in this study, and its feasibility for use in minimally invasive abdominal surgery was evaluated in a preclinical setting. The cooperative surgical robot consists of a six-degree-of-freedom collaborative robot arm and a one-degree-of-freedom bidirectional telescopic end-effector specializing in surgical assistance.
View Article and Find Full Text PDFAll Suture Biceps Tenodesis Has Greater Biomechanical Strength Than Metal Button Fixation.
Arthrosc Sports Med Rehabil
December 2024
Department of Orthopaedic Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland, U.S.A.
Purpose: To evaluate the maximal load to failure, cyclic displacement, stiffness, and modes of failure of onlay subpectoral biceps tenodesis with an intramedullary unicortical metal button (MB) versus an inlay, all-suture Caspari-Weber (CW) technique.
Methods: Sixteen matched paired human cadaveric proximal humeri were randomly allocated for subpectoral BT with either CW or MB using a high-strength suture (N = 16; 8 male, 8 female, mean age = 82.5 years, range 62-99 years).
A non-metallic PEEK topology optimization reconstruction implant for large mandibular continuity defects, validated using the MANDYBILATOR apparatus.
Sci Rep
January 2025
Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands.
In cases of large mandibular continuity defects resulting from malignancy resection, the current standard of care involves using patient-specific/custom titanium reconstruction plates along with autogenous grafts (fibula, scapula, or iliac crest segments). However, when grafts are not feasible or desired, only the reconstruction plate is used to bridge the gap. Unfortunately, metal osteosynthesis and reconstruction plates, including titanium, exhibit adverse effects such as stress-shielding and limitations in accurate postoperative irradiation (especially with proton-beam therapy).
View Article and Find Full Text PDFDoes Improved Resection Plane Coverage During Shoulder Arthroplasty Influence Proximal Humeral Bone Stress? A Comparison of Circular vs. Elliptical Humeral Heads.
J Shoulder Elbow Surg
December 2024
Department of Mechanical Engineering, Western University, London, ON, Canada; The Roth|McFarlane Hand and Upper Limb Centre, St. Joseph's Hospital, London, ON, Canada; Department of Surgery, Western University, London, ON, Canada. Electronic address:
Introduction: Stress shielding remains a concern following total shoulder arthroplasty using press-fit short humeral stems. While the effect of alterations in implant geometry, positioning, and sizing on stress shielding have been investigated, the effects of coverage of the cortical boundary of the resection plane have not yet been fully explored. The purpose of this study was to quantify the effect of improved cortical coverage using elliptical vs.
View Article and Find Full Text PDFDisc degeneration influences the strain magnitude and stress distribution within the adjacent trabecular bone.
Front Bioeng Biotechnol
December 2024
Department of Bioengineering, Imperial College London, London, United Kingdom.
Article Synopsis
- Up to 20% of people may experience osteoporotic vertebral fractures, and current bone mineral density (BMD) measurements present challenges in predicting these fractures.
- The study examined how intervertebral disc (IVD) degeneration affects stress and strain distribution in adjacent vertebrae by using human cadaveric lumbar specimens and advanced imaging techniques.
- Results indicated that trabecular bone near degenerated IVDs experienced significantly higher strains and altered stress distributions compared to non-degenerated IVDs, suggesting that incorporating IVD metrics could enhance fracture risk assessments.
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