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Rüger M, Seitz AM, Nuss K, von Rechenberg B, Seitz D, Kostmann C, Quadbeck P, Andersen O, Collins C. A Bioinspired Orthopedic Biomaterial with Tunable Mechanical Properties Based on Sintered Titanium Fibers. Adv Healthc Mater 2023; 12:e2202106. [PMID: 36250334 DOI: 10.1002/adhm.202202106] [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: 08/20/2022] [Indexed: 01/18/2023]
Abstract
Inadequate mechanical compliance of orthopedic implants can result in excessive strain of the bone interface, and ultimately, aseptic loosening. It is hypothesized that a fiber-based biometal with adjustable anisotropic mechanical properties can reduce interface strain, facilitate continuous remodeling, and improve implant survival under complex loads. The biometal is based on strategically layered sintered titanium fibers. Six different topologies are manufactured. Specimens are tested under compression in three orthogonal axes under 3-point bending and torsion until failure. Biocompatibility testing involves murine osteoblasts. Osseointegration is investigated by micro-computed tomography and histomorphometry after implantation in a metaphyseal trepanation model in sheep. The material demonstrates compressive yield strengths of up to 50 MPa and anisotropy correlating closely with fiber layout. Samples with 75% porosity are both stronger and stiffer than those with 85% porosity. The highest bending modulus is found in samples with parallel fiber orientation, while the highest shear modulus is found in cross-ply layouts. Cell metabolism and morphology indicate uncompromised biocompatibility. Implants demonstrate robust circumferential osseointegration in vivo after 8 weeks. The biometal introduced in this study demonstrates anisotropic mechanical properties similar to bone, and excellent osteoconductivity and feasibility as an orthopedic implant material.
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Affiliation(s)
- Matthias Rüger
- Department of Paediatric Orthopedics and Traumatology, University Children´s Hospital, University of Zurich, Zurich, 8032, Switzerland.,Laboratory for Bone Biomechanics, Institute for Biomechanics, ETH Zurich, Zurich, 8093, Switzerland
| | - Andreas Martin Seitz
- Institute of Orthopedic Research and Biomechanics, Centre of Trauma Research, University Medical Centre, 89081, Ulm, Germany
| | - Katja Nuss
- Musculoskeletal Research Unit, Department of Mechanisms of Disease, Vetsuisse Faculty, Center for Applied Biotechnology and Molecular Medicine (CABMM), University of Zurich, Zurich, 8057, Switzerland
| | - Brigitte von Rechenberg
- Musculoskeletal Research Unit, Department of Mechanisms of Disease, Vetsuisse Faculty, Center for Applied Biotechnology and Molecular Medicine (CABMM), University of Zurich, Zurich, 8057, Switzerland
| | - Daniel Seitz
- Biomed Center Innovation gGmbH, 95447, Bayreuth, Germany
| | - Cris Kostmann
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Branch Lab Dresden, 01277, Dresden, Germany
| | - Peter Quadbeck
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Branch Lab Dresden, 01277, Dresden, Germany
| | - Olaf Andersen
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Branch Lab Dresden, 01277, Dresden, Germany
| | - Caitlyn Collins
- Laboratory for Bone Biomechanics, Institute for Biomechanics, ETH Zurich, Zurich, 8093, Switzerland.,Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, Virginia, 24061, USA
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Vijay R, Mendhi J, Prasad K, Xiao Y, MacLeod J, Ostrikov K(K, Zhou Y. Carbon Nanomaterials Modified Biomimetic Dental Implants for Diabetic Patients. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2977. [PMID: 34835740 PMCID: PMC8625459 DOI: 10.3390/nano11112977] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 10/27/2021] [Accepted: 11/01/2021] [Indexed: 01/14/2023]
Abstract
Dental implants are used broadly in dental clinics as the most natural-looking restoration option for replacing missing or highly diseased teeth. However, dental implant failure is a crucial issue for diabetic patients in need of dentition restoration, particularly when a lack of osseointegration and immunoregulatory incompetency occur during the healing phase, resulting in infection and fibrous encapsulation. Bio-inspired or biomimetic materials, which can mimic the characteristics of natural elements, are being investigated for use in the implant industry. This review discusses different biomimetic dental implants in terms of structural changes that enable antibacterial properties, drug delivery, immunomodulation, and osseointegration. We subsequently summarize the modification of dental implants for diabetes patients utilizing carbon nanomaterials, which have been recently found to improve the characteristics of biomimetic dental implants, including through antibacterial and anti-inflammatory capabilities, and by offering drug delivery properties that are essential for the success of dental implants.
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Affiliation(s)
- Renjini Vijay
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
| | - Jayanti Mendhi
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
| | - Karthika Prasad
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- School of Engineering, College of Engineering and Computer Science, Australian National University, Canberra, ACT 2600, Australia
| | - Yin Xiao
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Jennifer MacLeod
- School of Chemistry and Physics, Faculty of Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Kostya (Ken) Ostrikov
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- School of Chemistry and Physics, Faculty of Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Yinghong Zhou
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (R.V.); (J.M.); (K.P.); (Y.X.)
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- The Australia-China Centre for Tissue Engineering and Regenerative Medicine (ACCTERM), Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
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Malekzadeh BÖ, Erlandsson MC, Tengvall P, Palmquist A, Ransjo M, Bokarewa MI, Westerlund A. Effects of implant-delivered insulin on bone formation in osteoporotic rats. J Biomed Mater Res A 2018; 106:2472-2480. [PMID: 29673097 DOI: 10.1002/jbm.a.36442] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 03/06/2018] [Accepted: 03/15/2018] [Indexed: 02/05/2023]
Abstract
Osteoporosis is a major cause of age-related fractures. Healing complications in osteoporotic patients are often associated with increased mortality and morbidity. Stimulation of the implant-adjacent bone could be beneficial in terms of the surgical outcome. Over the past decade, numerous investigations have implicated insulin in normal bone growth, and recent studies have described the advantages of administering insulin locally to increase bone formation. Therefore, we hypothesized that insulin-coated titanium implants would increase bone formation in osteoporotic animals. The aim of this study was to evaluate the effects of insulin delivered from an implant surface on bone-related gene expression and bone formation in osteoporotic rats. Characterizations of the surfaces of insulin-coated and control implants were performed using ellipsometry and interferometry. Forty ovariectomized and four healthy Sprague Dawley rats were used and implants were inserted in the tibias. The systemic effect of insulin was assessed by measuring the blood glucose levels and total body weight. The animals were sacrificed either 1 day or 3 weeks postimplantation. Implant-adherent cells were analyzed by quantitative real-time PCR, and the bone adjacent to the implants was examined by microcomputed tomography and histomorphometry. The insulin-coated implants had no systemic effects. The insulin-coated samples demonstrated significantly lower expression of the gene for interleukin 1β (p = 0.019) at 1 day, and significantly exhibited more periosteal callus (p = 0.029) at 3 weeks. Locally delivered insulin has potential for promoting bone formation and it exerts potentially anti-inflammatory effects in osteoporotic rats. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A:2472-2480, 2018.
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Affiliation(s)
- Behnosh Ö Malekzadeh
- Department of Orthodontics, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Biomaterials, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Malin C Erlandsson
- Department of Rheumatology and Inflammation Research, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Pentti Tengvall
- Department of Biomaterials, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anders Palmquist
- Department of Biomaterials, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Maria Ransjo
- Department of Orthodontics, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Maria I Bokarewa
- Department of Rheumatology and Inflammation Research, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anna Westerlund
- Department of Orthodontics, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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