Impact of Different Surface Treatments on Flexural Strength and Surface Roughness of Zirconia Implant Material: An In Vitro study

The objective of this in vitro study was to evaluate the effect of three surface treatments and two adhesive systems on the shear bond strength of old and freshly placed amalgam. The results suggested that the intact amalgam showed a significantly higher strength than repaired groups and the strongest repaired specimens were made when the amalgam surfaces were roughened with a diamond bur or microetcher. The adhesive systems showed no significant differences on bond strength with the same superficial texture.

Download Full-text

Evaluation of Polypropylene Fiber Reinforced Glass Ionomer Cement: A Comparative In-Vitro Study

Journal of Advanced Oral Research ◽

10.1177/2320206820930490 ◽

2020 ◽

Vol 11 (2) ◽

pp. 196-201

Author(s):

Fatih Oznurhan ◽

Ceren Ozturk

Keyword(s):

Surface Roughness ◽

Flexural Strength ◽

In Vitro Study ◽

Vitro Study ◽

Control Group ◽

Glass Ionomer ◽

Fiber Reinforced ◽

Group 4 ◽

Group 3

Aim: To compare the surface roughness, microtensile bond strength (µTBS), and flexural strength of polypropylene (PP) fibers reinforced glass ionomer cements (GICs). Materials and Methods: A comparative in vitro study was designed to test the PP fiber reinforced GIC, which was formed when 0.5–1 mm length PP fibers were added into the powder of conventional GIC. Four groups were prepared (Group 1: control, Group 2: 1 wt% PP fiber, Group 3: 3 wt% PP fiber, and Group 4: 5 wt% PP fiber) to evaluate flexural strength, surface roughness values, and µTBS. A total of 10 samples with 25 × 2.5 × 5 mm dimensions were prepared for each group to test flexural strength. Disk-shaped specimens ( n = 10) of 2 mm thickness and 10 mm diameter were used to test surface roughness. A total of 24 human primary molar teeth were used to evaluate µTBS, and 12 sticks were obtained for each group. The fractured surface analyses of samples from µTBS was performed using scanning electron microscope. The data obtained from the experiments were recorded and analyzed with one-way analyses of variance technique, and the normality was tested using the Shapiro–Wilk technique. A significance level of .05 was used. Results: In flexural strength tests, Group 3 (3 wt% PP fiber) showed significantly increased values ( p < .05) when compared with other groups. Group 4 (5 wt% PP) showed significantly highest values in surface roughness tests ( p < .05). No significant differences were seen between the groups ( p > .05) according to µTBS results. More PP fibers were seen in fractured surfaces, when PP ratio increases. Conclusion: It was observed that increased PP fiber percentage showed increased surface roughness, and 3 wt% PP fiber gave optimal values for fracture toughness. Incorporation of PP fiber to GIC does not affect the bonding to primary tooth dentine.

Download Full-text

Comparison of Flexural Strength and Surface Roughness of two Different Flexible and Heat Cure Denture Base Material: An in Vitro Study

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-2407 ◽

2018 ◽

Vol 19 (10) ◽

pp. 1214-1220

Author(s):

AV Rajanikanth ◽

Vinisha Pandey ◽

Reshu Singh ◽

Pawanjeet S Chawla ◽

Eisha Shaw ◽

...

Keyword(s):

Surface Roughness ◽

Flexural Strength ◽

Base Material ◽

In Vitro Study ◽

Vitro Study ◽

Denture Base ◽

Heat Cure

Download Full-text

FRACTURE RESISTANCE OF CEMENTED AND INTEGRATED CERAMIC CROWNS SUPPORTED ON ZIRCONIA IMPLANT ABUTMENTS (IN VITRO STUDY)

Alexandria Dental Journal ◽

10.21608/adjalexu.2020.21315.1030 ◽

2020 ◽

Vol 0 (0) ◽

pp. 0-0

Author(s):

catherine Mounir

Keyword(s):

Fracture Resistance ◽

In Vitro Study ◽

Vitro Study ◽

Implant Abutments ◽

Ceramic Crowns ◽

Zirconia Implant

Download Full-text

Shear bond strength of metal/ceramic Interface after different surface treatments: an in vitro study. Resistência ao cisalhamento da interface metal/cerâmica após diferentes tratamentos de superfície: estudo in vitro

International Journal of Science Dentistry ◽

10.22409/ijosd.v1i38.132 ◽

2013 ◽

Author(s):

Sílvia Fontes Do Amaral Pereira

Keyword(s):

Bond Strength ◽

Shear Bond Strength ◽

In Vitro Study ◽

Surface Treatments ◽

Vitro Study ◽

Metal Ceramic

O objetivo do presente estudo in vitro foi verificar, através de teste de cisalhamento, a resistência de união da liga Wironia®light, à base de níquel-cromo sem berílio, sujeita a diferentes tratamentos de superfície, às cerâmicas Vita VM13 e Noritake. Foram confeccionados oitenta espécimes cilíndricos metálicos, com o auxílio de uma matriz de aço, nas dimensões de 4 mm de diâmetro por 4 mm de altura. Os espécimes foram divididos em oito grupos (n=10), de acordo com o tipo de tratamento superficial aplicado à liga metálica e com o tipo de cerâmica testada. Estes foram avaliados de acordo com os critérios de resistência ao cisalhamento e, com o auxílio de microscopia óptica, foi avaliada a área de cerâmica remanescente aderida ao metal após a fratura. Os corpos-de-prova do G6 (fabricados em Cerâmica Noritake com jateamento-26,401 ± 11,637 MPa) apresentaram maior resistência ao cisalhamento (p> 0,05) enquanto que os menores valores foram registrados no G4 (Cerâmica Vita com utilização de broca-13,440 ± 7,766 MPa). G6 (19425,4 μm2) apresentou a maior área de cerâmica aderida ao metal (p> 0,05) enquanto que o G4 (2310,2 μm2) apresentou a menor área. Concluiu-se que G6 obteve os valores mais altos de resistência ao cisalhamento e de remanescente cerâmico aderido à superfície metálica enquanto que o G4 obteve os valores mais baixos. Descritores: Restaurações metalo-cerâmicas; ligas de níquel-cromo;porcelana dentária.

Download Full-text