Effect of different biocompatible implant materials on the mechanical stability of dental implants under excessive oblique load

2019 ◽  
Vol 21 (6) ◽  
pp. 1206-1217 ◽  
Author(s):  
Khaled Bataineh ◽  
Mohammad Al Janaideh
Keyword(s):  
Dental Implants ◽  
Mechanical Stability ◽  
Implant Materials ◽  
Oblique Load

scholarly journals Rabbits as Animal Models in Contemporary Implant Biomaterial Research

2011 ◽  
Vol 2 (2) ◽  
pp. 129-134 ◽  
Author(s):  
Himanshu Arora ◽  
Anil Nafria ◽  
Anup Kanase
Keyword(s):  
Animal Models ◽  
Dental Implants ◽  
Dental Implant ◽  
Mechanical Stability ◽  
In Vitro Studies ◽  
Clinical Use ◽  
Essential Step ◽  
Rigorous Testing

ABSTRACT Development of an optimal interface between bone and orthopedic or dental implants has taken place for many years. In order to determine whether a newly developed implant material conforms to the requirements of biocompatibility, mechanical stability and safety, it must undergo rigorous testing both in vitro and in vivo. Results from in vitro studies can be difficult to extrapolate to the in vivo situation. For this reason the use of animal models is often an essential step in the testing of orthopedic and dental implants prior to clinical use in humans. This review discusses the reasons, the importance, and the research carried out in rabbits in our quest to develop a dental implant ideally suited for human bone.

Towards the Optimal Crown-to-Implant Ratio in Dental Implants

2017 ◽  
Author(s):  
T. J. Sego ◽  
Yung-Ting Hsu ◽  
Tien-Min Gabriel Chu ◽  
Andres Tovar
Keyword(s):  
Dental Implants ◽  
Strain Distribution ◽  
Mechanical Stability ◽  
Element Model ◽  
Equivalent Strain ◽  
Skeletal Tissue ◽  
Term Stability ◽  
Long Term Stability ◽  
Clinical Scenarios

Short dental implants are commonly recommended to be implemented with small crown-to-implant (C/I) ratios due to their mechanical stability — decreasing C/I ratios cause less deformation in skeletal tissue under occlusal force. However, the long-term stability of short implants with high C/I ratios remains a controversial issue due to biomechanical complications. This study evaluates the strain distribution and functional implications in an implant-supported crown with various C/I ratios using a high-fidelity, nonlinear finite-element model. Several clinical scenarios are simulated by loading implants with various implant lengths (IL) and crown heights (CH). Strain distribution and maximum equivalent strain are analyzed to evaluate the effects and significance of CH, IL, and the C/I ratio. The study shows underloading for certain implant configurations with high C/I ratio. Increasing IL and decreasing C/I in moderation demonstrates a positive effect in long-term stability.

scholarly journals Influence of Connection Type and Platform Diameter on Titanium Dental Implants Fatigue: Non-Axial Loading Cyclic Test Analysis

2020 ◽  
Vol 17 (23) ◽  
pp. 8988
Author(s):  
Ana I. Nicolas-Silvente ◽  
Eugenio Velasco-Ortega ◽  
Ivan Ortiz-Garcia ◽  
Alvaro Jimenez-Guerra ◽  
Loreto Monsalve-Guil ◽  
...  
Keyword(s):  
Dental Implants ◽  
Axial Loading ◽  
Test Analysis ◽  
Load Limit ◽  
Implant Abutment ◽  
Connection Type ◽  
Number Of Cycles ◽  
Oblique Load ◽  
Titanium Dental Implants

Two-pieces dental implants must provide stability of the implant-abutment-interface. The connection type and platform diameter could influence the biomechanical resistance and stress distribution. This study aims to evaluate the fatigue for different types of connections, external and internal, and different platform diameters. Three implant designs with the same length were used: (a) external hexagon/narrow platform; (b) internal double hexagon/narrow platform; (c) internal octagon/regular platform. A fatigue test was developed to establish the number of cycles needed before fracture. A 30º oblique load with a sinusoidal function of fatigue at a frequency of 15 Hz and 10% stress variation was applied to each system. The fatigue load limit (FLL) for design (a) was 190 N, being the nominal-curvature-moment (NCM) = 1.045; FLL = 150 N, with a NCM = 0.825 for (b), and FLL = 325 N, with a NCM = 1.788 for (c). The platform diameter affects the FLL, obtaining lower FLL on a narrow platform. The connection type interferes with the implant walls’ width, especially in narrow implants, making internal connections more unstable at this level. Long-term clinical studies to assess the restoration’s success rate and survival are mandatory.

scholarly journals Evaluation of biofilm colonization on multi-part dental implants in a rat model

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Eva Blank ◽  
Jasmin Grischke ◽  
Andreas Winkel ◽  
Joerg Eberhard ◽  
Nadine Kommerein ◽  
...  
Keyword(s):  
Dental Implants ◽  
Antibiotic Treatment ◽  
Bacterial Colonization ◽  
Laser Scanning Microscopy ◽  
Treatment Groups ◽  
Implant Materials ◽  
Custom Made ◽  
Group A ◽  
Group B

Abstract Background Peri-implant mucositis and peri-implantitis are highly prevalent biofilm-associated diseases affecting the tissues surrounding dental implants. As antibiotic treatment is ineffective to fully cure biofilm mediated infections, antimicrobial modifications of implants to reduce or prevent bacterial colonization are called for. Preclinical in vivo evaluation of the functionality of new or modified implant materials concerning bacterial colonization and peri-implant health is needed to allow progress in this research field. For this purpose reliable animal models are needed. Methods Custom made endosseous dental implants were installed in female Sprague Dawley rats following a newly established three-step implantation procedure. After healing of the bone and soft tissue, the animals were assigned to two groups. Group A received a continuous antibiotic treatment for 7 weeks, while group B was repeatedly orally inoculated with human-derived strains of Streptococcus oralis, Fusobacterium nucleatum and Porphyromonas gingivalis for six weeks, followed by 1 week without inoculation. At the end of the experiment, implantation sites were clinically assessed and biofilm colonization was quantified via confocal laser scanning microscopy. Biofilm samples were tested for presence of the administered bacteria via PCR analysis. Results The inner part of the custom made implant screw could be identified as a site of reliable biofilm formation in vivo. S. oralis and F. nucleatum were detectable only in the biofilm samples from group B animals. P. gingivalis was not detectable in samples from either group. Quantification of the biofilm volume on the implant material revealed no statistically significant differences between the treatment groups. Clinical inspection of implants in group B animals showed signs of mild to moderate peri-implant mucositis (4 out of 6) whereas the mucosa of group A animals appeared healthy (8/8). The difference in the mucosa health status between the treatment groups was statistically significant (p = 0.015). Conclusions We developed a new rodent model for the preclinical evaluation of dental implant materials with a special focus on the early biofilm colonization including human-derived oral bacteria. Reliable biofilm quantification on the implant surface and the symptoms of peri-implant mucositis of the bacterially inoculated animals will serve as a readout for experimental evaluation of biofilm-reducing modifications of implant materials.

scholarly journals Plant-Derived Nanobiomaterials as a Potential Next Generation Dental Implant Surface Modifier

2021 ◽  
Vol 8 ◽  
Author(s):  
Jaison Jeevanandam ◽  
Michael K. Danquah ◽  
Sharadwata Pan
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Bone Cells ◽  
Implant Surface ◽  
Implant Materials ◽  
Synthetic Materials ◽  
Dental Implant Surface ◽  
Nanocarbon Materials ◽  
Ionic States ◽  
Physical And Chemical

Dental implants resemble synthetic materials, mainly designed as teeth-mimics to replace the damaged or irregular teeth. Specifically, they are demarcated as a surgical fixture of artificial implant materials, which are placed into the jawbone, and are allowed to be fused with the bone, similar to natural teeth. Dental implants may be categorized into endosteal, subperiosteal, and zygomatic classes, based on the placement of the implant “in the bone” or on top of the jawbone, under the gum tissue. In general, titanium and its alloys have found everyday applications as common, successful dental implant materials. However, these materials may also undergo corrosion and wear, which can lead to degradation into their ionic states, deposition in the surrounding tissues, as well as inflammation. Consequently, nanomaterials are recently introduced as a potential alternative to replace the conventional titanium-based dental implants. However, nanomaterials synthesized via physical and chemical approaches are either costly, non/less biocompatible, or toxic to the bone cells. Hence, biosynthesized nanomaterials, or bionanomaterials, are proposed in recent studies as potential non-toxic dental implant candidates. Further, nanobiomaterials with plant origins, such as nanocelluloses, nanometals, nanopolymers, and nanocarbon materials, are identified to possess enhanced biocompatibility, bioavailability and no/less cytotoxicity with antimicrobial efficacy at low costs and ease of fabrication. In this minireview, we present an outline of recent nanobiomaterials that are extensively investigated for dental implant applications. Additionally, we discuss their action mechanisms, applicability, and significance as dental implants, shortcomings, and future perspectives.

scholarly journals Association between Bone Density Values, Primary Stability and Histomorphometric Analysis of Dental Implant Osteotomy Sites on the Upper Jaw

Folia Medica ◽  
2020 ◽  
Vol 62 (3) ◽  
pp. 563-571
Author(s):  
Vasilena Ivanova ◽  
Ivan Chenchev ◽  
Stefan Zlatev ◽  
Dimitar Atanasov
Keyword(s):  
Bone Density ◽  
Dental Implants ◽  
Bone Quality ◽  
Mechanical Stability ◽  
Primary Stability ◽  
Bone Allograft ◽  
Histomorphometric Analysis ◽  
Socket Preservation ◽  
Density Values ◽  
Protein Rich

Introduction: Sufficient bone volume, as well as the bone quality characteristics are necessary prerequisites to ensure optimal mechanical stability of the implants and subsequent osseointegration. Aim: The aim of the present study was to assess the correlation between bone density values obtained by cone-beam computed tomography (CBCT), the primary stability of dental implants and the histomorphometric analysis of bone quality. Materials and methods: Following tooth extraction, socket preservation with frieze-dried bone allograft or protein-rich fibrin (PRF) was performed on 30 patients with 30 maxillary teeth in the region from second premolar to second premolar. Four months after the procedure, CBCT was used to assess the bone density (Hounsfield units) in the area of extraction. Thirty bone samples were harvested from implant sites using a trephine drill. They were analyzed with Image J software. Immediately after placing the implant, the implant stability quotient was measured using the Osstell Idx device. Results: The results revealed significant correlations between bone density and primary stability along the vestibulo-oral (r=0.392, p=0.032) and mesiodistal axes (r=0.407, p=0.026). Bone density also correlated strongly with the percentage of newly formed bone (r=0.776, p<0.001). Conclusion: Bone quality, in terms of bone density measured in CBCT and new bone formation are correlated to the primary stability of the dental implants and vice versa.

scholarly journals Level of Knowledge and Challenges Associated With Practice of Dental Implants among Dental Practitioners in Selected Hospitals in South East, Nigeria

2020 ◽  
pp. 27-35
Author(s):  
Samuel Chinonyerem Okoronkwo ◽  
Peter Chidiebere Okorie ◽  
Marcus Ikechukwu Onyemobi ◽  
Chidinma Sonia Obiekwe ◽  
John Emaimo ◽  
...  
Keyword(s):  
Oral Cavity ◽  
Dental Implants ◽  
Dental Implant ◽  
Study Design ◽  
Significant Relationship ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Implant Materials ◽  
Dental Practitioners ◽  
Level Of Knowledge

Aim: This study is aimed at ascertaining the level of knowledge and challenges associated with the practice of dental implants among dental practitioners in selected hospitals in South East, Nigeria. Study Design: the study employed cross sectional study design. Place and Duration of Study: The research was carried out within six months (September 2018 to March 2019) in selected hospitals and clinics in South-East, Nigeria. Methodology: Data were collected using structural pretested questionnaire administered to 117 purposefully selected consenting respondents (Dental Professionals). Data were analyzed descriptively and inferentially using SPSS version 20. The hypotheses were tested at 0.05 level of significance and data generated were subjected to percentage findings presented by the use of tables. Data collected were analyzed and discussed. Result: the result affirmed female respondents were more than male with 59.0%, indicating Dental Therapist as majority in proportion with 64%. On quality of implant shows 64.9% and 56.4% on comfort and function which indicates it as a good quality, 64.9% poor availability and 49.6% awareness and knowledge. While inferentially, using Pearson Chi-Square showed a significant relationship of 177.552; df = 16 @ P=0.05 between profession of respondents and knowledge of dental implant materials/devices types while using ANOVA showed a significant relationship with F =42.147; df =4 @ P=.05; knowledge of dental implant materials and assessment of dental implant to aesthetics on oral cavity, F =77.760; df =4 @ P=.05 and  knowledge of dental implant materials and assessment of dental implant to retention on oral cavity, F =54.985; df =4 @ P=.05. Conclusion: from the results obtained, accredited dental implant as an appliance capable of obviating most of dentures shortcomings which depends on contra-indication and indication of it, and its challenges in the profession. Although there are challenges associated with dental implant awareness and application in Nigeria. Recommendations and tips on successful further studies were given.

scholarly journals Assessment of Mechanical Stability and Safety for Fully Edentulous Maxilla with Dental Implants

2010 ◽  
Vol 4 (7) ◽  
pp. 953-962 ◽  
Author(s):  
Takaaki ARAHIRA ◽  
Mitsugu TODO ◽  
Yasuyuki MATSUSHITA ◽  
Kiyoshi KOYANO
Keyword(s):  
Dental Implants ◽  
Mechanical Stability

Biomechanical Properties of Orthopedic and Dental Implants

2021 ◽  
pp. 506-518
Author(s):  
Manjeet Kumar ◽  
Rajesh Kumar ◽  
Sandeep Kumar ◽  
Chander Prakash
Keyword(s):  
Mechanical Properties ◽  
Dental Implants ◽  
Mechanical Stability ◽  
Stress Shielding ◽  
Surface Characteristics ◽  
Biomechanical Properties ◽  
Foreign Body Response ◽  
Load Bearing ◽  
Age Related ◽  
Body Response

The demand for the orthopedic and dental implants has increased sharply in last decade due to physical traumas and age-related deficiencies. The material used for orthopedic and dental implants should be biocompatible to ensure the adaptability of the implant in the human body. The mechanical stability of implants is dependent on mechanical properties and surface characteristics essential to ensure corrosion and wear resistance. The requirement of mechanical properties also differs substantially from load-bearing to non-load-bearing implants. There are many problems arising due to lack of sufficient biocompatibility, like infection, poor osseointegration, and excessive foreign body response. Fatigue failure, stress shielding, and bone resorption are some major problems associated with lack of mechanical stability. Numerous conventional materials, coatings, and nanomaterials have been used to enhance the implant stability.

Biomechanical Properties of Orthopedic and Dental Implants

2019 ◽  
pp. 1-13 ◽  
Author(s):  
Manjeet Kumar ◽  
Rajesh Kumar ◽  
Sandeep Kumar ◽  
Chander Prakash
Keyword(s):  
Mechanical Properties ◽  
Dental Implants ◽  
Mechanical Stability ◽  
Stress Shielding ◽  
Surface Characteristics ◽  
Biomechanical Properties ◽  
Foreign Body Response ◽  
Load Bearing ◽  
Age Related ◽  
Body Response

The demand for the orthopedic and dental implants has increased sharply in last decade due to physical traumas and age-related deficiencies. The material used for orthopedic and dental implants should be biocompatible to ensure the adaptability of the implant in the human body. The mechanical stability of implants is dependent on mechanical properties and surface characteristics essential to ensure corrosion and wear resistance. The requirement of mechanical properties also differs substantially from load-bearing to non-load-bearing implants. There are many problems arising due to lack of sufficient biocompatibility, like infection, poor osseointegration, and excessive foreign body response. Fatigue failure, stress shielding, and bone resorption are some major problems associated with lack of mechanical stability. Numerous conventional materials, coatings, and nanomaterials have been used to enhance the implant stability.

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