Evaluation of the Mechanical Reliability of Different Implant-Abutment Connections for Single Crowns According to the ISO 14801 Fatigue Test Protocol

Thomé, Geninho; Gomes, André Felipe Torres; Moura, Marcos Boaventura de; Felippi, Christian; Trojan, Larissa Carvalho

doi:10.11607/jomi.7965

Cited by 6 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The base and the catalyst of the polyurethane resin were mixed in equal portions and poured inside 3 /4 inch in diameter PVC cylinders (2 cm in height). After the polymerization reaction, ISO 14801 was followed [14,16]. The milling of the polyurethane block for implant fixation was performed using the specific and sequential milling burs, with the aid of a precision dental milling machine (BioArt Dental Equipment, São Carlos, Brazil), in order to determine a same axis for implant placement for all samples.…”

Section: Methodsmentioning

confidence: 99%

Survival Rate and Deformation of External Hexagon Implants with One-Piece Zirconia Crowns

Bottıno

Oliveira

Sabino

et al. 2021

Metals

View full text Add to dashboard Cite

This study aimed to evaluate the survival rates of several external hexagon implants directly connected to zirconia crowns after thermomechanical fatigue. The deformation of the hexagons and the integrity of zirconia crowns were also evaluated. A monolithic zirconia crown (Y-TZP) and four different external hexagon dental implants (n = 10, N = 40) were mounted together and embedded in polyurethane. The specimens were subjected to thermomechanical cycling for 2.5 × 106 cycles, at 3.0 Hz frequency, at 200 N loading. The interface of the implant/zirconia crown system, zirconia crowns integrity before and after cycling, and the implant hexagon surface were evaluated under stereomicroscopy and SEM. A nanohardness analysis was performed to verify the hardness of zirconia and implants. Statistical analysis was performed using the Kaplan-Meier test, Multi-Sample Survival Tests, Logrank Test, (p = 0.05). The data did not show significant differences in the survival rates of different implant groups. However, some crowns presented fractures (16.67%) and the external hexagon region of the implants presented plastic deformations (100%). During chewing simulation, the interface between titanium implant and zirconia abutment can promote plastic deformation in the metal and surface defects in the ceramic. In addition, the types of interface defects can be affected by the external hexagon design.

show abstract

Section: Methodsmentioning

confidence: 99%

Survival Rate and Deformation of External Hexagon Implants with One-Piece Zirconia Crowns

Bottıno

Oliveira

Sabino

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

“…In this body, 2 alveoli were made using the sequence of drills indicated. The perforations were 3 mm apart and then 2 implants were installed with a manual torque wrench and 3 mm of exposed threads according to ISO 148018:2007 standard [11] (Figure 1). Then, 20 standardized metallic frameworks were cast in Co-Cr (10 for the mini-conical trunnion and 10 for the straight trunnion).…”

Section: Methodsmentioning

confidence: 99%

“…The specimens from each group were positioned with a 30 • inclination of the implant in relation to the ground (ISO 14801:2007) [11]. Each group was placed in the Erios Mechanical Fatigue Simulator and a 60-mm tip was placed over each sample with a load of 250 N and frequency of 4 Hz, in the axial direction.…”

Section: Methodsmentioning

confidence: 99%

“…Data were statistically analyzed using two-way ANOVA with α = 5% and Tukey test, considering the presence or absence of mesh (Minitab Inc., State College, PA, USA). The specimens from each group were positioned with a 30° inclination of the implant in relation to the ground (ISO 14801:2007) [11]. Each group was placed in the Erios Mechanical Fatigue Simulator and a 60-mm tip was placed over each sample with a load of 250 N and frequency of 4 Hz, in the axial direction.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Abutment Type and Tightening Sequence on Torque Maintenance Capacity after Mechanical Cycling in Splinted Implant-Supported Restorations

Nakano

Gomes

Queiroz

et al. 2021

Oral

View full text Add to dashboard Cite

The aim of this study was to compare the screw removal torque of mini-conical prosthetic components and straight trunnion of indexed morse taper implants after mechanical cycling. The sample consisted of 40 implants and 20 mini-conical prosthetic components (MC group) and 20 straight trunnion components (ST group). Each group consisted of 10 specimens, with 2 implants in each, and cobalt–chromium metallic crowns were screwed into each sample. The components of the MC group received a torque of 20 N-cm with a digital torque wrench, and after 10 min were retightened with the same value as the initial torque. The components of the ST group received a torque of 30 N-cm, with a digital torque wrench, and after 10 min, they were retightened with the same value. The screws of the respective crowns of the two groups received a torque of 10 N-cm and after 10 min were retightened with the same value. Each group was subjected to the fatigue test in a mechanical cycler at 2,000,000 cycles, with a load of 250 N and frequency of 4 Hz. At the end of the fatigue test, the loosening torque of each screw of the specimens was measured through a digital torque wrench. The data were analyzed by two-way ANOVA and a Tukey test. In both groups, there were loss of torque. The results showed no statistic difference between MC and ST groups (p > 0.05).

show abstract

Crack initiation and growth simulations of functionally graded dental implant subjected to cyclic axial loads

Anari

Selahi

2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Two essential characteristics in designing dental implants are having high fracture resistance and being compatible with jawbone. One of the best implant choices to achieve this aim is titanium-hydroxyapatite functionally graded (FG) material. Also, fracture of implants under cyclic loads is one of the most common causes of destruction of dental implants. However, the crack initiation location and growth path as well as the optimum material distribution for the FG implants are questions that have not been answered yet. The aim of this study was introducing a new and powerful numerical approach to predict the crack initiation behavior and progressive damage in the FG dental implants, subjected to cyclic axial loadings. The approach is developed by employing extended finite element method (XFEM) in ABAQUS software, Visual Studio, and FORTRAN Compiler. Also, the Python code was modified for crack growth modeling in fatigue fracture analysis based on Paris law. The result showed that the micro-cracks below the outer surface of FG implant are created, due to the application of cyclic load, which is invisible. This research shows that FG implants with power factor less than 1 show much more resistance to crack growth under pre-tightening and cyclic loadings.

show abstract

Evaluation of the Mechanical Reliability of Different Implant-Abutment Connections for Single Crowns According to the ISO 14801 Fatigue Test Protocol

Cited by 6 publications

References 0 publications

Survival Rate and Deformation of External Hexagon Implants with One-Piece Zirconia Crowns

Survival Rate and Deformation of External Hexagon Implants with One-Piece Zirconia Crowns

Effect of Abutment Type and Tightening Sequence on Torque Maintenance Capacity after Mechanical Cycling in Splinted Implant-Supported Restorations

Crack initiation and growth simulations of functionally graded dental implant subjected to cyclic axial loads

Contact Info

Product

Resources

About