How to qualify and validate wear simulation devices and methods

Heintze, Siegward D.

doi:10.1016/j.dental.2006.02.002

Cited by 320 publications

(328 citation statements)

References 112 publications

Supporting

Mentioning

312

Contrasting

Unclassified

Order By: Relevance

“…The parameters chosen for the mastication simulator were a loading force of 50 N with 250 000 cycles, vertical speed of 30 mm/second, and a lateral movement of 0.7 mm from forward to backward. [21][22][23] The number of cycles was sufficient to cause changes in the antagonist. 21 An average of between 240 000 and 250 000 mastication simulator cycles conforms with 1 year of in vivo wear.…”

Section: Discussionmentioning

confidence: 99%

“…22 The difference between using no lateral movements and 0.7 mm lateral movements led to 8 times more wear. 23 A force of 50 N was used as this is the average force found between the antagonists orally. 23 High-impact velocity (60 mm/second) would produce a bouncing effect in a single mastication cycle because of the stiffness of the specimen.…”

Section: Discussionmentioning

confidence: 99%

“…23 A force of 50 N was used as this is the average force found between the antagonists orally. 23 High-impact velocity (60 mm/second) would produce a bouncing effect in a single mastication cycle because of the stiffness of the specimen. 24,25 Therefore, half that impact velocity was used to avoid the bouncing effect.…”

Section: Discussionmentioning

confidence: 99%

“…Specific conditions were used for mastication simulation and aging to simulate clinical condtions. [21][22][23][24][25] The experiment was performed underwater, which served as a medium for the removal of any debris from the antagonist and partially simulated the oral environment. The use of steatite balls simulated human enamel when occluded with zirconia in the mastication simulator.…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of polishing procedures and hydrothermal aging on wear characteristics and phase transformation of zirconium dioxide

Bartolo

Cassar

Husain

et al. 2017

The Journal of Prosthetic Dentistry

View full text Add to dashboard Cite

Statement of problem. Yttria-stabilized zirconia used for the fabrication of crowns and fixed\ud \ud prostheses may require intraoral adjustments after placement and cementation. Grinding and\ud \ud polishing methods may result in changes in the surface characteristics of zirconia.\ud \ud Purpose. The purpose of this in vitro study was to assess the effect of polishing procedures on\ud \ud surface roughness, topographical and phase changes of zirconia, and wear of the opposing dentition.\ud \ud Material and methods. Presintered and precut yttria-stabilized zirconia specimens (10×10×1 mm)\ud \ud were divided into 4 groups (control, Intensiv, Shofu, 3M ESPE) depending on the polishing method\ud \ud used to prepare the specimens. All tests were carried out in triplicate. The specimens were polished\ud \ud depending on the polishing regimen, while the control was left untreated. The specimens were\ud \ud thermocycled for 3000 cycles, with a temperature range of 5C to 55C. The surface roughness,\ud \ud elemental, and phase changes caused by polishing before and after thermocycling were assessed\ud \ud with surface profilometry, energy-dispersive spectroscopy, and X-ray diffraction analysis. The wear on\ud \ud antagonist steatite balls was also measured after mastication simulation. Statistical analysis was\ud \ud performed using 1-way ANOVA and the Tukey post hoc test to perform multiple comparison tests (a=.05).\ud \ud Results. The polishing procedures increased surface roughness (Ra) of yttria-stabilized zirconia from\ud \ud 0.52 for the control specimen to 0.73 for Intensiv, 0.70 for Shofu, and 0.70 for 3M ESPE (P<.05), which\ud \ud was reduced by thermocycling to 0.44 (control), 0.58 (Intensiv), and 0.58 (Shofu) (P<.001), while\ud \ud roughness remained unchanged for 3M ESPE specimens (0.75; P=.452). The deposition of aluminum\ud \ud when using Shofu abrasives and nickel in Intensiv was demonstrated. Phase changes were observed\ud \ud on the zirconia surface with formation of the monoclinic phase in all polishing methods. Specimen\ud \ud aging enhanced the surface phase changes and also induced compressive stresses in zirconia\ud \ud polished with Intensiv. The different polishing protocols did not affect the wear to the antagonist (P>.05).\ud \ud Conclusions. Polishing zirconia increased surface roughness and led to surface phase changes, but\ud \ud wear to the antagonist was not affected.peer-reviewe

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of polishing procedures and hydrothermal aging on wear characteristics and phase transformation of zirconium dioxide

Bartolo

Cassar

Husain

et al. 2017

The Journal of Prosthetic Dentistry

View full text Add to dashboard Cite

show abstract

“…However, TML is influenced by a number of factors, including applied force, force profile, contact time, sliding movement and clearance of worn material. These factors are not controlled in every phase of the simulation [44].…”

Section: Discussionmentioning

confidence: 99%

Marginal adaptation of ceramic and composite inlays in minimally invasive mod cavities

et al. 2013

View full text Add to dashboard Cite

OBJECTIVES: This study aims to evaluate the effect of a minimally invasive mesial-occlusaldistal (mod) preparation on the marginal adaptation of ceramic and composite inlays with the aim of saving sound dental substance. MATERIALS AND METHODS: Class II mod cavities were prepared in 50 extracted human molars and randomly allocated to five groups (n = 10). In all groups, the mesialproximal box margins were located in the dentin, 1 mm below the cementoenamel junction (CEJ), while the distal box margins were 1 mm above the CEJ. In groups A and B, conventional standard preparations with a divergent angle of = 6°were prepared. In groups C, D, and E, minimally invasive standard preparations with a convergent angle of = 10°were prepared. In groups A and D, composite inlays and, in groups B and C, ceramic inlays were fabricated (chairside economical restoration of esthetic ceramics (CEREC)) and adhesively inserted. In group E, a direct composite filling using the incremental technique was placed. Replicas were taken before and after thermomechanical loading (1,200,000 cycles, 50/5°C, max. load 49 N). Marginal integrity (tooth-luting composite, luting composite-inlay) was evaluated by scanning electron microscopy (×200). The percentage of continuous margins in the different locations was compared between and within groups before and after cycling, using ANOVA and Scheffé post hoc test. RESULTS: After the thermomechanical loading, no significant differences were observed between the different groups with respect to the interface of luting composite-inlay. At the interface of toothluting composite for preparations involving the dentin, groups A and B behaved significantly better compared to the control group E, which in turn were not different to groups C and D. CONCLUSION: Composite and ceramic inlays inserted in minimally invasive prepared mod cavities result in margins not different from those of inlays placed in conventional mod preparations. Direct composite filling margins, however, were inferior to those attained by conventional indirect restorations. CLINICAL RELEVANCE: Minimally invasive preparations for mod inlays with undercuts show marginal adaptation equal to that of conventional inlay preparation design. Keywords: Composite inlay, ceramic inlay; minimally-invasive; marginal adaption Declaration of interests:The authors declare they have no conflicts of interest. AbstractObjectives To evaluate the effect of a minimally-invasive mod-preparation on the marginal adaptation of ceramic and composite inlays with the aim of saving sound dental substance. Materials and MethodsClass II mod-cavities were prepared in 50 extracted human molars and randomly allocated to five groups (n=10). In all groups, the mesial-proximal-box-margins were located in dentin, 1 mm below the cementoenamel junction (CEJ), while the distal-boxmargins were 1 mm above the CEJ. In group A and B, conventional standard preparations with a divergent angle of α = 6° were prepared. In Group C, D and E minimally invasive standard preparation...

show abstract

Experimental Investigation on Wear of Ceramic Materials for Dental Restorations

Gräber

Wäsche

2009

Friction, Wear and Wear Protection

View full text Add to dashboard Cite

How to qualify and validate wear simulation devices and methods

Cited by 320 publications

References 112 publications

Effect of polishing procedures and hydrothermal aging on wear characteristics and phase transformation of zirconium dioxide

Effect of polishing procedures and hydrothermal aging on wear characteristics and phase transformation of zirconium dioxide

Marginal adaptation of ceramic and composite inlays in minimally invasive mod cavities

Experimental Investigation on Wear of Ceramic Materials for Dental Restorations

Contact Info

Product

Resources

About