scholarly journals A NEW SYSTEM OF IMPLANT ABUTMENT CONNECTION: HOW TO IMPROVE A TWO PIECE IMPLANT SYSTEM SEALING

2017 ◽  
Vol 10 (3) ◽  
pp. 234
Author(s):  
F Grecchi
Keyword(s):  
Implant Abutment ◽  
Implant System ◽  
New System

scholarly journals Impact of Dynamic Loading on the Implant-abutment Interface Using a Gas-enhanced Permeation Test In Vitro

2015 ◽  
Vol 9 (1) ◽  
pp. 112-119
Author(s):  
Anas Al-Jadaa ◽  
Thomas Attin ◽  
Timo Peltomäki ◽  
Christian Heumann ◽  
Patrick Roger Schmidlin
Keyword(s):  
Dynamic Loading ◽  
Group Testing ◽  
Pressure Change ◽  
Leakage Resistance ◽  
Implant Abutment ◽  
Bacterial Leakage ◽  
Static Conditions ◽  
Implant System ◽  
Permeation Test

Purpose : To assess implant leakage under static conditions as well as during and after dynamic loading. Materials and methods : Implants (Astra Tech (A), Biomet 3i (B) and Nobel Biocare (C)) were evaluated for leakage (n=8/group). Testing to assess the gas pressure change over time (hPa/min) and infiltrated fluid volume, was performed in a Gas Enhanced Permeation Test (GEPT) to qualify embedding. Implant apexes were then drilled, abutments were mounted and resin build-ups were fabricated. GEPT was reassessed. Samples were afterward mounted in a computer-controlled masticator while tested to bacterial leakage, they were daily observed for turbidity. Samples were then reassessed using GEPT. Dunnett's and Fisher's exact tests were utilized to compare implant and to analyze bacterial leakage. Results : Significant differences in GEPT values were shown after loading (p=0.034). Leakage resistance was best for B when compared to C (p=0.023). Samples with higher GEPT values demonstrated earlier bacterial leakage, occurring after 1 or 2 days (A=4, B=0, C=6) and showing favorability for implant system B (p=0.009). Conclusion : Implants leaking under static conditions had increased potential for bacterial leakage under dynamic conditions. As strongly correlating to sophisticated analytical methods, GEPT is a promising technique for assessing the overall implant system leakage resistance.

Comparison of the Compressive Strength of 3 Different Implant Design Systems

2007 ◽  
Vol 33 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Jose E. Pedroza ◽  
Ysidora Torrealba ◽  
Augusto Elias ◽  
Walter Psoter
Keyword(s):  
Compressive Strength ◽  
Failure Mode ◽  
Mechanical Stability ◽  
Testing Machine ◽  
Implant Design ◽  
Static Compression ◽  
Implant Abutment ◽  
Holding Device ◽  
Design Systems ◽  
Implant System

Abstract The aims of this study were twofold: to compare the static compressive strength at the implant-abutment interface of 3 design systems and to describe the implant abutment connection failure mode. A stainless steel holding device was designed to align the implants at 30° with respect to the y-axis. Sixty-nine specimens were used, 23 for each system. A computer-controlled universal testing machine (MTS 810) applied static compression loading by a unidirectional vertical piston until failure. Specimens were evaluated macroscopically for longitudinal displacement, abutment looseness, and screw and implant fracture. Data were analyzed by analysis of variance (ANOVA). The mean compressive strength for the Unipost system was 392.5 psi (SD ± 40.9), for the Spline system 342.8 psi (SD ± 25.8), and for the Screw-Vent system 269.1 psi (SD ± 30.7). The Unipost implant-abutment connection demonstrated a statistically significant superior mechanical stability (P ≤ .009) compared with the Spline implant system. The Spline implant system showed a statistically significant higher compressive strength than the Screw-Vent implant system (P ≤ .009). Regarding failure mode, the Unipost system consistently broke at the same site, while the other systems failed at different points of the connection. The Unipost system demonstrated excellent fracture resistance to compressive forces; this resistance may be attributed primarily to the diameter of the abutment screw and the 2.5-mm counter bore, representing the same and a unique piece of the implant. The Unipost implant system demonstrated a statistically significant superior compressive strength value compared with the Spline and Screw-Vent systems, at a 30° angulation.

scholarly journals Original vs Non-Original “Cast-To” Gold Abutment-Implant Connection: Analysis of the Internal Fit and Long-Term Fatigue Performance

2020 ◽  
Author(s):  
Raquel Alonso-Pérez ◽  
José F. Bartolomé ◽  
Cristina Fraile ◽  
Guillermo Pradíes
Keyword(s):  
Artificial Saliva ◽  
Testing Machine ◽  
Cyclic Fatigue ◽  
Fatigue Performance ◽  
Tight Contact ◽  
Implant Abutment ◽  
Implant System ◽  
Internal Fit

Abstract Background: Restoring implants with not original abutment-implant connection are widely used by clinicians. Due to the current scarcity of in-vitro studies about compatible abutments and lack of relevant clinical studies, long-term fatigue performance of non-original abutments should be analyzed. The aim of this research was to assess the internal accuracy and the cyclic fatigue life after artificial aging of three implant-abutment configurations restored with one original and two compatible non-original “cast-to” gold abutments.Materials and Methods: Forty-eight original internal hexagon connection implants were connected to three different brands of abutments (n= 16 each): one original to the implant system and two non-originals. Internal accuracy and the percentage of surface with tight contact were assessed under Scanning Electron Microscope (SEM) in twelve cross-sectioned samples at three different areas (platform, internal and screw). To evaluate the fatigue mechanical behaviour under cyclic load, samples were loaded according to the ISO Norm 14801 in a universal testing machine at 2 Hz in air. Previously, samples were aged by thermocycling with 10,000 cycles at 5 °C and 55 °C in artificial saliva. Results: Original abutments presented the best accuracy and highest percentage of tight contact in the internal areas. Meanwhile, original abutments showed the lower cyclic fatigue strength degradation and the long-term success. Conclusions: Occlusal loads are transferred more homogenously through the system when original abutments are used because the better fit between the different internal components. This fact provides the highest fatigue resistance for all the restorations studied.

scholarly journals Biomechanical Evaluation of the Effects of Implant Neck Wall Thickness and Abutment Screw Size: A 3D Nonlinear Finite Element Analysis

2020 ◽  
Vol 10 (10) ◽  
pp. 3471 ◽  
Author(s):  
Ming-Dih Jeng ◽  
Yang-Sung Lin ◽  
Chun-Li Lin
Keyword(s):  
Finite Element ◽  
Wall Thickness ◽  
Alveolar Bone ◽  
Nonlinear Finite Element ◽  
Bone Strain ◽  
Concentrated Force ◽  
Element Analysis ◽  
Implant Abutment ◽  
Implant System ◽  
Abutment Screw

In this study, we evaluate the influence of implant neck wall thickness and abutment screw size on alveolar bone and implant component biomechanical responses using nonlinear finite element (FE) analysis. Twelve internal hexagon Morse taper implant–abutment connection FE models with three different implant sizes (diameters 4, 5, and 6 mm), secured with 1.4, 1.6, and 1.8 mm abutment screws to fit with three unilateral implant neck wall thicknesses of 0.45, 0.50, and 1.00 mm, were constructed to perform simulations. Nonlinear contact elements were used to simulate realistic interface fixation within the implant system. A 200 N concentrated force was applied toward the center of a hemispherical load cap and inclined 30° relative to the implant axis as the loading condition. The simulation results indicated that increasing the unilateral implant neck wall thickness from 0.45 to 1.00 mm can significantly decrease implant, abutment, and abutment screw stresses and bone strain, decreased to 58%, 48%, 54%, and 70%, respectively. Variations in abutment screw size only significantly influenced abutment screw stress, and the maximum stress dissipation rates were 10% and 29% when the diameter was increased from 1.4 to 1.6 and 1.8 mm, respectively. We conclude that the unilateral implant neck wall thickness is the major design factor for the implant system and implant neck wall thickness in effectively decreasing implant, abutment, and abutment screw stresses and bone strain.

Influence of implant/abutment joint designs on abutment screw loosening in a dental implant system

2005 ◽  
Vol 75B (2) ◽  
pp. 457-463 ◽  
Author(s):  
Tsuyoshi Kitagawa ◽  
Yasuhiro Tanimoto ◽  
Misako Odaki ◽  
Kimiya Nemoto ◽  
Masahiro Aida
Keyword(s):  
Dental Implant ◽  
Screw Loosening ◽  
Implant Abutment ◽  
Implant System ◽  
Abutment Screw

scholarly journals In VitroEvaluation of Bacterial Leakage at Implant-Abutment Connection: An 11-Degree Morse Taper Compared to a Butt Joint Connection

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Hooman Khorshidi ◽  
Saeed Raoofi ◽  
Afagh Moattari ◽  
Atoosa Bagheri ◽  
Mohammad Hassan Kalantari
Keyword(s):  
Survival Curve ◽  
Butt Joint ◽  
Chi Square ◽  
Kaplan Meier ◽  
Implant Abutment ◽  
Chi Square Test ◽  
Joint Connection ◽  
Bacterial Leakage ◽  
Implant System ◽  
Connection Design

Background and Aim. The geometry of implant-abutment interface (IAI) affects the risk of bacterial leakage and invasion into the internal parts of the implant. The aim of this study was to compare the bacterial leakage of an 11-degree Morse taper IAI with that of a butt joint connection.Materials and Methods. Two implants systems were tested (n=10per group): CSM (submerged) and TBR (connect). The deepest inner parts of the implants were inoculated with 2 μL ofStreptococcus mutanssuspension with a concentration of 108 CFU/mL. The abutments were tightened on the implants. The specimens were stored in the incubator at a temperature of 37°C for 14 days and the penetration of the bacterium in the surrounding area was determined by the observation of the solution turbidity and comparison with control specimens. Kaplan-Meier survival curve was traced for the estimation of bacterial leakage and the results between two groups of implants were statistically analyzed by chi-square test.Results. No case of the implant system with the internal conical connection design revealed bacterial leakage in 14 days and no turbidity of the solution was reported for it. In the system with butt joint implant-abutment connection, 1 case showed leakage on the third day, 1 case on the eighth day, and 5 cases on the 13th day. In total, 7 (70%) cases showed bacterial leakage in this system. Significant differences were found between the two groups of implants based on the incidence of bacterial leakage (p<0.05).Conclusion. The 11-degree Morse taper demonstrated better resistance to microbial leakage than butt joint connection.

scholarly journals Microchip implant system used for animal identification in laboratory rabbits, guineapigs, woodchucks and in amphibians

1995 ◽  
Vol 29 (3) ◽  
pp. 339-344 ◽  
Author(s):  
Margund Mrozek ◽  
Roger Fischer ◽  
Michael Trendelenburg ◽  
Uwe Zillmann
Keyword(s):  
Legal Aspects ◽  
Individual Identification ◽  
Reliable System ◽  
Marmota Monax ◽  
Animal Identification ◽  
Pleurodeles Waltlii ◽  
Implant System ◽  
New System ◽  
Implantation Procedure

Traditional methods for animal identification have a number of drawbacks. We evaluated a new system for individual identification using microchip implants in rabbits, guineapigs, woodchucks ( Marmota monax) and amphibians ( Xenopus laevis, Pleurodeles waltlii). Implantation procedure and long-term observations are described. Microchip implants proved to be a practicable and reliable system for animal identification without obvious adverse effects. The applicability of electronic animal identification in comparison with common methods and with regard to animal welfare and legal aspects is discussed.

scholarly journals Evaluation of Milled Titanium versus Laser Sintered Co-Cr Abutments on the Marginal Misfit in Internal Implant-Abutment Connection

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4873
Author(s):  
Esther Gonzalo ◽  
Beatriz Vizoso ◽  
Carlos Lopez-Suarez ◽  
Pedro Diaz ◽  
Jesus Pelaez ◽  
...  
Keyword(s):  
Clinical Success ◽  
Marginal Fit ◽  
Significance Level ◽  
Acceptable Range ◽  
Implant Abutments ◽  
Implant Abutment ◽  
Manufacturing Techniques ◽  
Electron Microscopes ◽  
Implant System ◽  
Scanning Electron Microscopes

The precision of fit at the implant-abutment connection is an important criterion for the clinical success of restorations and implants. Several factors are involved among which are the abutment materials and manufacturing techniques. The aim of this study was to investigate the effect of two materials and methods of manufacturing implant abutments, milled titanium versus laser sintered Co-Cr, on the marginal misfit at the implant-abutment interface. Scanning electron microscopes (SEM) were used to geometrically measure the marginal vertical discrepancy of a total of 80 specimens, classified into eight categories, according to the implant system and abutment. The data were statistically analyzed by Student’s paired t test, one-way and two-way ANOVA with the Bonferroni-Holm correction at the significance level of p = 0.05. Milled titanium abutments demonstrated the lowest misfit values in the implant systems analyzed. The marginal fit of all the groups was within the clinically acceptable range for implant prostheses.

A New Method of Hair Replacement Using Osseointegrated Prostheses

1994 ◽  
Vol 11 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Anthony S. Pignataro ◽  
Norman G. Schaaf
Keyword(s):  
Surgical Techniques ◽  
New Method ◽  
Replacement Surgery ◽  
Implant Abutment ◽  
Excellent Method ◽  
Full Head ◽  
Implant System

Osseointegrated prostheses have been used to replace teeth, eyes, ears, and noses. They may now be applied to hair replacement. Our objective is to offer patients further alternatives to traditional hair prostheses or hair replacement surgery. Standard implantology techniques were used to place maxillofacial implants in a patient's cranium. New prosthetic techniques allow attachment of a pliable hair prosthesis to a static implant abutment. The implant system has been found to be an excellent method for attachment of hair prostheses. The method introduced here incorporates surgical techniques with prosthetic hair replacement. It has all the advantages of being able to guarantee a full head of hair, while at the same time greatly decreasing surgical risks.

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