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 Fatigue of Narrow Dental Implants: Influence of the Hardening Method

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1429 ◽  
Author(s):  
R.A. Pérez ◽  
J. Gargallo ◽  
P. Altuna ◽  
M. Herrero-Climent ◽  
F.J. Gil
Keyword(s):  
Dental Implants ◽  
Healing Time ◽  
Implant Placement ◽  
Hardening Treatment ◽  
Pure Grade ◽  
Cold Worked ◽  
Number Of Cycles ◽  
Long Term Behavior ◽  
Titanium Dental Implants

The use of narrow titanium dental implants (NDI) for small ridges, reduced interdental space, or missing lateral incisors can be a viable option when compared to the conventional wider dental implants. Furthermore, in many cases, standard diameter implant placement may not be possible without grafting procedures, which increases the healing time, cost, and morbidity. The aim of this study was to analyze the mechanical viability of the current narrow implants and how narrow implants can be improved. Different commercially available implants (n = 150) were tested to determine maximum strength, strain to fracture, microhardness, residual stress, and fatigue obtaining the stress–number of cycles to fracture (SN) curve. Fractography was studied by scanning electron microscopy. The results showed that when the titanium was hardened by the addition of 15% of Zr or 12% cold worked, the fatigue limit was higher than the commercially pure grade 4 Ti without hardening treatment. Grade 4 titanium without hardening treatment in narrow dental implants can present fractures by fatigue. These narrow implants are subjected to high mechanical stresses and the mechanical properties of titanium do not meet the minimal requirements, which lead to frequent fractures. New hardening treatments allow for the mechanical limitations of conventional narrow implants to be overcome in dynamic conditions. These hardening treatments allow for the design of narrow dental implants with enhanced fatigue life and long-term behavior.

scholarly journals Does Implant-Abutment Interface affect Marginal Bone Levels around Implants?

2019 ◽  
Vol 13 (01) ◽  
pp. 047-052 ◽  
Author(s):  
Eser Elemek ◽  
Artun Urgancioglu ◽  
Janberd Dincer ◽  
Altug Cilingir
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Marginal Bone Loss ◽  
Single Crown ◽  
Implant Abutment ◽  
Different Types ◽  
Group A ◽  
Group B ◽  
Switch Group

Abstract Objective The use of dental implants with different types of surface roughness and implant-abutment interface has brought about a situation of marginal bone loss. Therefore, the aim of this study was to analyze and compare marginal bone levels of different types of osseointegrated dental implants with platform switch (Group A: Ankylos, Mannheim, Germany) and platform match (Group B: Dentsply Xive, Mannheim, Germany, and Group C: MIS Implant Technologies, Karmiel, Israel). Materials and Methods One hundred and seven patients (52 men and 55 women) with a mean age of 54.79 (standard deviation ± 12.35) years and a total of 321 dental implants (Group A, n = 198; Group B, n = 58; and Group C, n = 65) placed in a private practice between April 2006 and May 2015 were retrospectively analyzed. In addition to demographic information and implant characteristics, marginal bone levels were evaluated by Image J (Wayne Rasband, National Institute of Health, Maryland) program. Results The mean age of all patients was 54.79 ± 12.35 years, and 51.5% of them were women. Implants supporting fixed bridge were most commonly used in all groups (65%), whereas only 20% were restored with a single crown and 15% with overdentures. In total, 47.5% of all implants showed no marginal bone loss. Mean bone loss in Group A was significantly lower (0.81 ± 1.60 mm) as compared to Group B (1.58 ± 1.59 mm) and Group C (1.18 ± 1.36) (p < 0.005). Conclusion Among different types of dental implants, platform switch seems to preserve marginal bone levels and increase the long-term success of dental implants.

scholarly journals Elevated Systemic L-Kynurenine/L-Tryptophan Ratio and Increased IL-1 Beta and Chemokine (CX3CL1, MCP-1) Proinflammatory Mediators in Patients with Long-Term Titanium Dental Implants

2019 ◽  
Vol 8 (9) ◽  
pp. 1368 ◽  
Author(s):  
José Joaquín Merino ◽  
María Eugenia Cabaña-Muñoz ◽  
Adolfo Toledano Gasca ◽  
Alba Garcimartín ◽  
Juana Benedí ◽  
...  
Keyword(s):  
Dental Implants ◽  
Dental Materials ◽  
Study Groups ◽  
Dental Amalgam ◽  
Titanium Implants ◽  
Monocyte Chemoattractant Protein 1 ◽  
Proinflammatory Mediators ◽  
Dental Amalgam Fillings ◽  
Titanium Dental Implants

Titanium is the mean biocompatible metal found in dental titanium alloys (Ti-6Al-4V). The safety of certain dental biomaterial amalgams has been questioned in patients. The levels of several systemic cytokines (interleukin (IL)-1 beta, IL-4: pg/mL) and chemokines (monocyte chemoattractant protein-1 (MCP-1), soluble fractalkine (CX3CL1: pg/mL) were determined using ELISA and compared between these study groups. The study included 30 controls without dental materials (cont), 57 patients with long-term titanium dental implants plus amalgams (A + I group) as well as 55 patients with long-term dental amalgam alone (A group). All patients (except controls) have had dental titanium implants (Ti-6Al-4V) and/or amalgams for at least 10 years (average: 15 years). We evaluated whether systemic levels of cytokines/chemokines, kyn/L-trp ratio and aromatic amino acid levels (HPLC: mM/L, Phe, L-Trp, His, Treo) could be altered in patients with long-term dental titanium and/or amalgams. These systemic markers were evaluated in 142 patients. The A + I group had higher L-Kynurenine/L-Tryptophan ratios than patients with long-term dental amalgam fillings alone (A). In addition, levels of IL-1 Beta cytokine, CX3CL1 and MCP-1 chemokines were higher in the A + I group than in the A group (A). The increased L-kyn/L-trp ratio and MCP-1 and fractalkine receptor (CX3CR1) elevations could suggest enhanced chemotactic responses by these chemokines in the A + I group.

scholarly journals Increased Systemic Malondialdehyde Levels and Decreased Mo/Co, Mo/Hg2+, Co/Fe2+ Ratios in Patients with Long-Term Dental Titanium Implants and Amalgams

2019 ◽  
Vol 8 (1) ◽  
pp. 86 ◽  
Author(s):  
María Cabaña-Muñoz ◽  
José Parmigiani-Izquierdo ◽  
Fabio Camacho Alonso ◽  
José Merino
Keyword(s):  
Oxidative Stress ◽  
Dental Implants ◽  
Dental Materials ◽  
Dental Amalgam ◽  
Titanium Implants ◽  
Systemic Oxidative Stress ◽  
Hair Samples ◽  
Dental Amalgams ◽  
Titanium Dental Implants

Introduction: the biological safety of dental biomaterials has been questioned in human studies. Material and Methods: Several heavy metals/oligoelements were compared by Inductive Coupled Mass Spectrometry (ICP-MS) in hair samples from 130 patients (n = 54 patients with long-term titanium dental implants and amalgams (A + I group), 51 patients with long-term dental amalgam alone (A group), as well as controls (n = 25: without dental materials) of similar age. All patients (except controls) had had titanium dental implants and/or dental amalgams for at least 10 years (average: 17). We evaluated whether A + I patients could present higher systemic malondialdehyde levels (MDA) as compared to the A group. Results: The A + I group have lower molybdenum levels (A + I) and reduced Mo/Co and Mo/Fe2+ ratios, which could predispose them to oxidative stress by raising MDA levels as compared to the A group alone; our findings suggest that higher Co levels could enhance oxidative stress in the A + I group. However, there were no differences on metals from titanium alloy (Ti-6Al), Cr from crowns or Hg2+, Sn, Zn2+, Cu2+ levels between the A + I and A groups. Conclusion: patients with long-term dental titanium and amalgams have systemic oxidative stress due to rising MDA levels and lower Mo/Co and Mo/Fe2+ ratios than those with amalgams alone.

Superhydrophilic Multifunctional Nanotextured Titanium Dental Implants: In Vivo Short and Long-term Response in a Porcine Model

2021 ◽  
Author(s):  
Anil Mathew ◽  
Silpa Abraham ◽  
Shamilin Stephen ◽  
Anna Serene Babu ◽  
Siddaramana Gowd ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dental Implants ◽  
Porcine Model ◽  
Multifunctional Device ◽  
Short And Long Term ◽  
Pathogenic Agents ◽  
Titanium Dental Implants ◽  
Term Response

Current clinical demand in dental implantology is for a multifunctional device with optimum mechanical properties, improved biocompatibility, and bioactivity, and having differential interactions with cells and pathogenic agents. This would...

scholarly journals Clinical and radiological assessment of the condition of implants with fixed structures in the dynamics of 20-year follow-up

2021 ◽  
Author(s):  
EE Olesov ◽  
AS Ivanov ◽  
RS Zaslavskiy ◽  
AV Ragulin ◽  
AS Romanov
Keyword(s):  
Dental Implants ◽  
Long Term Results ◽  
Missing Teeth ◽  
Average Life ◽  
Clinical Center ◽  
The Moment ◽  
Titanium Dental Implants ◽  
Single Implant

The statistically significant long-term results of the implant survival and the effectiveness of prostheses are inadequately represented in scientific literature. The study was aimed to assess the effectiveness of prosthetics with fixed structures on the intraosseous dental implants for the replacement of partially absent dentition in the dynamics of the 20-year follow-up. A total of 671 patients with partially missing teeth were examined at the Clinical Center of Dentistry of the FMBA of Russia, who were fitted with 1,700 intraosseous titanium dental implants with the terms from the moment of completion of prosthetics on implants of 5, 10, 15 or 20 years. The criteria for clinical and radiological evaluation of the implant condition were as follows: no complications affecting the condition of periimplant tissues (normal), mucositis, periimplantitis with bone resorption at 1/3 or 1/2 of the implant height, implant removal. Based on 20 years of experience, prosthetics with fixed structures on implants is highly effective in replacing the partial defects of dentition. In total, 62.2% of implants remain functional for 20 years. The average life of implant-supported fixed prostheses is 15 years for bridges, and 20 years for single and combined implant-supported crowns. The most effective are single implant-supported crowns, and the least effective are prostheses supported by implants and teeth. The significantly preserved implant-supported prostheses make it possible to support the concept of the long-term implant installation with respect to the implant-supported non-removable prostheses. The view is thus confirmed that the effectiveness of the implant-supported prosthetics is reduced with the inclusion of teeth in the bridge support, along with implants.

Stress Evaluation of Implant-Abutment Connections Under Different Loading Conditions: A 3D Finite Element Study

2015 ◽  
Vol 41 (2) ◽  
pp. 133-137 ◽  
Author(s):  
Jessica Mie Ferreira Koyama Takahashi ◽  
Andreza Costa Dayrell ◽  
Rafael Leonardo Xediek Consani ◽  
Mauro Antônio de Arruda Nóbilo ◽  
Guilherme Elias Pessanha Henriques ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Axial Loading ◽  
Distribution Patterns ◽  
Stress Evaluation ◽  
Internal Connection ◽  
Implant Abutment ◽  
Connection System ◽  
External Connection ◽  
Bone Structures ◽  
Oblique Load

This study evaluated the effects of axial and oblique occlusal loading on implant-supported partial dentures with different connection systems (external hexagon, internal hexagon, and Morse taper). Upon axial loading, all systems presented similar stress values. Stress values increased under oblique loading. Stress distribution changed for some of the internal connection structures. It can be concluded that oblique load increases stress on bone structures and prosthetic components. Internal connection system implants present more favorable stress distribution patterns than do external connection system implants.

scholarly journals 3D Printing/Additive Manufacturing Single Titanium Dental Implants: A Prospective Multicenter Study with 3 Years of Follow-Up

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Samy Tunchel ◽  
Alberto Blay ◽  
Roni Kolerman ◽  
Eitan Mijiritsky ◽  
Jamil Awad Shibli
Keyword(s):  
Dental Implants ◽  
Success Rates ◽  
Implant Survival ◽  
Single Tooth ◽  
Implant Crown ◽  
Age Range ◽  
Titanium Dental Implants ◽  
Single Crowns

This prospective 3-year follow-up clinical study evaluated the survival and success rates of 3DP/AM titanium dental implants to support single implant-supported restorations. After 3 years of loading, clinical, radiographic, and prosthetic parameters were assessed; the implant survival and the implant-crown success were evaluated. Eighty-two patients (44 males, 38 females; age range 26–67 years) were enrolled in the present study. A total of 110 3DP/AM titanium dental implants (65 maxilla, 45 mandible) were installed: 75 in healed alveolar ridges and 35 in postextraction sockets. The prosthetic restorations included 110 single crowns (SCs). After 3 years of loading, six implants failed, for an overall implant survival rate of 94.5%; among the 104 surviving implant-supported restorations, 6 showed complications and were therefore considered unsuccessful, for an implant-crown success of 94.3%. The mean distance between the implant shoulder and the first visible bone-implant contact was 0.75 mm (±0.32) and 0.89 (±0.45) after 1 and 3 years of loading, respectively. 3DP/AM titanium dental implants seem to represent a successful clinical option for the rehabilitation of single-tooth gaps in both jaws, at least until 3-year period. Further, long-term clinical studies are needed to confirm the present results.

scholarly journals In vitro Comparison between Two Different Implant Titanium Surfaces in Osseointegration Process

2012 ◽  
Vol 1 (2) ◽  
pp. 84-88
Author(s):  
Andrea Ballini ◽  
Apollonia Desiate ◽  
Stefania Cantore
Keyword(s):  
Dental Implants ◽  
Therapeutic Strategies ◽  
Implant Design ◽  
Biomechanical Stability ◽  
Poor Bone Quality ◽  
Titanium Surfaces ◽  
Local Release ◽  
Titanium Dental Implants

ABSTRACT The osseointegration rate of titanium dental implants is related to their composition and surface roughness. Rough-surfaced implants favor both bone anchoring and biomechanical stability. The future of dental implantology should aim to develop surfaces with controlled and standardized topography or chemistry. This approach will be the only way to understand the interactions between proteins, cells and tissues and implant surfaces. The local release of bone stimulating or resorptive drugs in the peri-implant region may also respond to difficult clinical situations with poor bone quality and quantity, such as implant design and surface. These therapeutic strategies should ultimately enhance the osseointegration process of dental implants for their immediate loading and long-term success. Aim of this work was to compare implant titanium surfaces prepared with two different topographies for evaluating osteoblasts adhesion and growth. How to cite this article Ballini A, Desiate A, Cantore S. In vitro Comparison between Two Different Implant Titanium Surfaces in Osseointegration Process. Int J Experiment Dent Sci 2012; 1(2):84-88.

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