Biomaterials for Dental Implants

Lemons, Jack E.; Misch-Dietsh, Francine; McCracken, Michael S.

doi:10.1016/b978-0-323-07845-0.00004-x

Cited by 23 publications

(19 citation statements)

References 131 publications

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“…Thereby, bone living tissue was described by considering a dry-material model, wherein viscous and fluid-solid interaction effects were neglected. Implants and abutments were assumed to be constituted by a titanium alloy, Ti6Al4V, whose Young's modulus and Poisson's ratio were 114.0 GPa and 0.34, respectively [56]. Bone elastic properties were assumed to approximate type II bone quality [57] and, in agreement with data available in the literature [40, 47, 58], they were set as follows:

Poisson's ratio of the bone tissue (both cortical and trabecular) equal to 0.30;

Young's modulus of the cortical bone equal to 13.7 GPa;

Young's modulus of the cancellous bone equal to 0.5 GPa, corresponding to a mean bone density of about 0.5 g·cm −3 [59].

…”

Section: Methodsmentioning

confidence: 99%

Comparative Evaluation of Osseointegrated Dental Implants Based on Platform-Switching Concept: Influence of Diameter, Length, Thread Shape, and In-Bone Positioning Depth on Stress-Based Performance

Vairo

Sannino

2013

Computational and Mathematical Methods in Medicine

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This study aimed to investigate the influence of implant design (in terms of diameter, length, and thread shape), in-bone positioning depth, and bone posthealing crestal morphology on load transfer mechanisms of osseointegrated dental implants based on platform-switching concept. In order to perform an effective multiparametric comparative analysis, 11 implants different in dimensions and in thread features were analyzed by a linearly elastic 3-dimensional finite element approach, under a static load. Implant models were integrated with the detailed model of a maxillary premolar bone segment. Different implant in-bone positioning levels were modeled, considering also different posthealing crestal bone morphologies. Bone overloading risk was quantified by introducing proper local stress measures, highlighting that implant diameter is a more effective design parameter than the implant length, as well as that thread shape and thread details can significantly affect stresses at peri-implant bone, especially for short implants. Numerical simulations revealed that the optimal in-bone positioning depth results from the balance of 2 counteracting effects: cratering phenomena and bone apposition induced by platform-switching configuration. Proposed results contribute to identify the mutual influence of a number of factors affecting the bone-implant loading transfer mechanisms, furnishing useful insights and indications for choosing and/or designing threaded osseointegrated implants.

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Poisson's ratio of the bone tissue (both cortical and trabecular) equal to 0.30;

Young's modulus of the cortical bone equal to 13.7 GPa;

Young's modulus of the cancellous bone equal to 0.5 GPa, corresponding to a mean bone density of about 0.5 g·cm −3 [59].

…”

Section: Methodsmentioning

confidence: 99%

Comparative Evaluation of Osseointegrated Dental Implants Based on Platform-Switching Concept: Influence of Diameter, Length, Thread Shape, and In-Bone Positioning Depth on Stress-Based Performance

Vairo

Sannino

2013

Computational and Mathematical Methods in Medicine

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“…2 Dental implants and abutments are usually made of commercially pure titanium or a titanium alloy, due to its biocompatibility and mechanical properties. 3 To mask the potential show through of metallic abutments, zirconia abutments are widely utilized in the anterior sites. Not only do zirconia abutments preserve natural tissue color but also according to Manicone et al, 4 tissues surrounding zirconia abutments demonstrate less inflammatory infiltrate, less microvessel density, and less vascular endothelial growth factor expression than tissues around titanium abutments.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Türkyilmaz¹,

Black²,

Chong³

2017

The Journal of Contemporary Dental Practice

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Aim:The purpose of this in vitro investigation was to evaluate the sealing capability of the conical implant-abutment interfaces under different abutment screw torque values using titanium and zirconia abutments with Morse taper designs. Materials and methods:A total of 42 dental implants (n = 21 for titanium abutments and n = 21 for zirconia abutments) were inoculated internally with three bacteria. These assemblies were divided into four test groups (n = 10) based on screw fixation torques of 35 or 20 Ncm and placed in sterile broth; the remaining abutments were used as positive controls and torqued to 10 Ncm. Microleakage was quantified by enumerating the bacteria from the colony-forming units. An analysis of variance for the estimates of bacteria enumerated and microgaps was used with a post hoc analysis as indicated. A p-value of 0.05 was used as the level of significance.Results: There was no statistically significant difference in microleakage among the four test groups; there were no significant effects of screw torque or abutment type on the bacteria enumerated. There was a significantly smaller mean microgap with the zirconia abutments. Evaluation of the Sealing Conclusion:The results of this study indicated no statistically significant difference in the sealing capabilities between titanium and zirconia abutments, having internal conical connections, after increasing the abutment screw torque.Clinical significance: It is important for clinicians to follow the guidelines suggested by the implant companies to avoid biomechanical complications over time.

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“…However, a combination of design, material, and application limitations resulted in a signifi cant number of clinical failures and the subsequent withdrawal of this device from clinical use. [20,25,27] …”

Section: Ceramicsmentioning

confidence: 99%

“…These compounds are subjected to steam sterilization, results in a measurable decrease in strength, which treated with chemical solutions may leave residues and rough The properties such as chemical biocompatibility improved strength and toughness capabilities of zirconia; sapphire continue to make them excellent candidates for dental implants. [20][21][22][23][24][25][26][27][28][29][30][31] Bioactive and Biodegradable Ceramics (Based on Calcium Phosphates)…”

Section: Ceramicsmentioning

confidence: 99%

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Osseointegration

Reddy¹

2015

IDJAR

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Nowadays dental implants have become an important part of patient management, and the treatment of choice in many dental reconstructive cases. The history of implant, its composition, diff erent materials used for its manufacturing is still in a dilemma. This article describes titanium its historical background, diff erent types of implants used before. Per Ingvar Brånemark was the fi rst person who introduced the concept osseointegration. The aim of this paper is to make the clinician aware of the implant designs, materials for predictable success for rehabilitation of many clinical situations.

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Biomaterials for Dental Implants

Cited by 23 publications

References 131 publications

Comparative Evaluation of Osseointegrated Dental Implants Based on Platform-Switching Concept: Influence of Diameter, Length, Thread Shape, and In-Bone Positioning Depth on Stress-Based Performance

Comparative Evaluation of Osseointegrated Dental Implants Based on Platform-Switching Concept: Influence of Diameter, Length, Thread Shape, and In-Bone Positioning Depth on Stress-Based Performance

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Osseointegration

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