Numerical assessment of bone remodeling around conventionally and early loaded titanium and titanium–zirconium alloy dental implants

Akça, Kıvanç; Eser, Atılım; Çavuşoğlu, Yeliz; Sağırkaya, Elçin; Çehreli, Murat Cavit

doi:10.1007/s11517-015-1256-0

Cited by 12 publications

(9 citation statements)

References 29 publications

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“…In the implant body, the Poisson's ratio became larger in TiZr than in cpTi, and the strain of the implant body itself increased, resulting in decreased stress. This result is consistent with the report that stress in the surrounding bone decreases as the elastic modulus diminishes [36]. It has also been reported that as the elastic modulus decreases, surrounding bone formation increases.…”

Section: Discussionsupporting

confidence: 93%

“…TiZr, which has been used in recent years, is not expected to be toxic and has high mechanical strength exceeding Ti-6Al-4V, so it is anticipated as a new biomaterial. Based on in vivo experiments, its osseointegration and biocompatibility are comparable to cpTi [34][35][36]. Other studies reported that TiZr has a tensile strength 40% higher and a fatigue strength 13-42% higher than cpTi, as well as increased mechanical strength when compared with conventional biomaterials [8].…”

Section: Discussionmentioning

confidence: 98%

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Three-dimensional finite element analysis of extra short implants focusing on implant designs and materials

et al. 2020

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Aim: When using short implants, fracture of the implant body and bone resorption are a concern because stress concentrates on and around a short implant. The purpose of this research is to investigate the differences in stress distribution between tissue level (TL) and bone level (BL) implant body designs, and between commercially pure titanium (cpTi) and the newer titanium-zirconium (TiZr) alloy in using short implants. Materials and methods: Models of TL and BL implants were prepared for three-dimensional finite element analysis. The implants were produced in 10 mm, 8 mm, and 6 mm lengths, and the TL was also produced in a 4-mm length. A static load of 100 N inclined at 30°to the long axis was applied to the buccal side of the model. The largest maximum principal stress value in the cortical bone and the largest von Mises stress value in the implant body were evaluated. Results: Stress concentration was observed at the connection part of the implant, especially above the bone in TL and within the bone in BL. In the TL design, tensile stress occurred on the buccal side and compressive stress on the lingual side of the cortical bone. Conversely, in the BL design, tensile stress occurred on the lingual side of the cortical bone. CpTi and TiZr showed a similar stress distribution pattern. The maximum stress values were lower in the TL design than the BL design, and they were lower with TiZr than cpTi for both the cortical bone and implant body. The maximum value tended to increase as the length of the implant body decreased. In addition, the implant body design was more influential than its length, with the TL design showing a stress value similar to the longer BL design. Conclusion: Using TiZr and a TL design may be more useful mechanically than cpTi and a BL design when the length of the implant body must be shorter because of insufficient vertical bone mass in the mandible.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 98%

Three-dimensional finite element analysis of extra short implants focusing on implant designs and materials

et al. 2020

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“…The mechanical properties of orthopedic implants dictate the efficacy of bone contact. 51 A clear discrepancy in stiffness between the implant and bone, such as that observed with traditional Ti or Zr, results in nonhomogeneous stress transfer and inevitably leads to bone resorption, prosthesis loosening, and bone refracture. 52 In contrast, the equivalent stiffness of the PAC Zr surfaces and bone may help to reduce the stress shielding effect and potentially improve orthopedic implant viability.…”

Section: ■ Discussionmentioning

confidence: 99%

“…Carbon nitride films are relatively hard and elastic when compared to the softer and stiffer hydrogenated carbon materials deposited by plasma discharges in hydrocarbon gases alone. The mechanical properties of orthopedic implants dictate the efficacy of bone contact . A clear discrepancy in stiffness between the implant and bone, such as that observed with traditional Ti or Zr, results in nonhomogeneous stress transfer and inevitably leads to bone resorption, prosthesis loosening, and bone refracture .…”

Section: Discussionmentioning

confidence: 99%

Plasma-Activated Tropoelastin Functionalization of Zirconium for Improved Bone Cell Response

Yeo¹,

Santos

Kondyurin³

et al. 2016

ACS Biomater. Sci. Eng.

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The mechanical strength, durability, corrosion resistance, and biocompatibility of metal alloys based on zirconium (Zr) and titanium (Ti) make them desirable materials for orthopedic implants. However, as bioinert metals, they do not actively promote bone formation and integration. Here we report a plasma coating process for improving integration of such metal implants with local bone tissue. The coating is a stable carbonbased plasma polymer layer that increased surface wettability by 28%, improved surface elasticity to the range exhibited by natural bone, and additionally covalently bound the extracellular matrix protein, tropoelastin, in an active conformation. The thus biofunctionalized material was significantly more resistant to medical-grade sterilization by steam, autoclaving or gamma-ray irradiation, retaining >60% of the adhered tropoelastin molecules and preserving full bioactivity. The interface of the coating and metal was robust so as to resist delamination during surgical insertion and in vivo deployment, and the plasma process employed was utilized to also coat the complex 3D geometries typical of orthopedic implants. Osteoblast-like osteosarcoma cells cultured on the biofunctionalized Zr surface exhibited a significant 30% increase in adhesion and up to 70% improvement in proliferation. Cells on these materials also showed significant early stage up-regulation of bone marker expression (alkaline phosphatase, 1.8 fold; osteocalcin, 1.4 fold), and sustained up-regulation of these genes (alkaline phosphatase, 1.3 fold; osteocalcin, 1.2 fold) in osteogenic conditions. In addition, alkaline phosphatase production significantly increased (2-fold) on the functionalized surfaces, whereas bone mineral deposition increased by 30% above background levels compared to bare Zr. These findings have the potential to be readily translated to the development of improved Zr and Ti-based implants for accelerated bone repair.

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“…The model of a maxillary overdenture on four implants with ball attachments revealed no difference in the stress and strain values in periimplant bone, using titanium or zirconia [41]. A three-dimensional FEA model found no difference between titanium and titanium-zirconium alloy implants, neither for early nor conventional functional loading [42]. A study found difference in bone behavior depending on the macrogeometry of the zirconia fixture [43].…”

Section: Zirconia and Surrounding Bonementioning

confidence: 99%

Ceramic Materials as an Alternative to Titanium for Dental Implant Fabrication

Mobilio¹,

Mollica²,

Catapano³

2016

Dental Implantology and Biomaterial

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Titanium is the gold standard material to produce dental implants from more than years, showing high success rate in different clinical scenarios. Zirconia implants were recently introduced to overwhelm some aesthetic and biological problems that can arise from titanium. Preclinical studies show that, from a mechanical point of view, zirconia may be a suitable substitute for titanium in implant fabrication. Three-dimensional finite element analysis FE" models found no difference between titanium and titaniumzirconium alloy implants, neither for early nor conventional functional loading. Nevertheless, zirconia presents the same osseoconductive properties of the titanium, even if the few clinical studies show survival and success rates slightly inferior for zirconia implants comparing to titanium ones, and long-term follow-ups are missing. For these reasons, the majority of authors agree to be cautious for proposing zirconia implants as widespread substitute of titanium implants.

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Numerical assessment of bone remodeling around conventionally and early loaded titanium and titanium–zirconium alloy dental implants

Cited by 12 publications

References 29 publications

Three-dimensional finite element analysis of extra short implants focusing on implant designs and materials

Three-dimensional finite element analysis of extra short implants focusing on implant designs and materials

Plasma-Activated Tropoelastin Functionalization of Zirconium for Improved Bone Cell Response

Ceramic Materials as an Alternative to Titanium for Dental Implant Fabrication

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