Influence of Occlusal Thickness and Radicular Extension on the Fracture Resistance of Premolar Endocrowns from Different All-Ceramic Materials

Endocrowns are primarily recommended in a molar region with a standardized preparation design. The aim of the study was to evaluate the effect of different occlusal preparation depths, pulp chamber-radicular extension, and all-ceramic materials on the fracture resistance of premolar endocrowns. Ninety human premolar teeth were root canal treated, randomly divided into three main groups according to all-ceramic material used for fabrication as Lithium Disilicate (LD) ceramic, Polymer infiltrated ceramic (PIC) and High translucency zirconia (HTZ). They were further subdivided into three subgroups (n = 10) according to preparation design of 2 mm occlusal reduction, 4.5 mm occlusal reduction and 4.5 mm occlusal reduction with 2 mm radicular extension. The endocrowns from respective restorative materials were fabricated, surface conditioned, and cemented with self-adhesive resin cement. All samples were thermocycled for 5000 cycles and subjected to compressive static load at 45° angluation with the cross-head speed of 0.5 mm/minute until the fracture. The mean fracture resistance of LD ceramic at 2 mm, 4.5 mm thickness and radicular extension was 62.55 MPa, 45.80 MPa, 74.27 MPa respectively. The corresponding values for the PIC and HTZ ceramics were 26.30 MPa, 21.65 MPa, 25.66 Mpa and 23.47 MPa, 27.30 MPa, 37.29 MPa respectively. The LD ceramic and greater extension inside the pulp chamber had higher fracture resistance.

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Effects of curing mode and moisture on nanoindentation mechanical properties and bonding of a self-adhesive resin cement to pulp chamber floor

Dental Materials ◽

10.1016/j.dental.2013.03.020 ◽

2013 ◽

Vol 29 (6) ◽

pp. 708-717 ◽

Cited By ~ 17

Author(s):

Horieh Moosavi ◽

Ilnaz Hariri ◽

Alireza Sadr ◽

Suppason Thitthaweerat ◽

Junji Tagami

Keyword(s):

Mechanical Properties ◽

Resin Cement ◽

Pulp Chamber ◽

Adhesive Resin ◽

Adhesive Resin Cement ◽

Chamber Floor

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Chromatic Study of All-Ceramic Restorations Evaluation of Adhesive Resin Cement and Trial Cement from the Viewpoint of Color Difference.

Nihon Hotetsu Shika Gakkai Zasshi ◽

10.2186/jjps.42.383 ◽

1998 ◽

Vol 42 (3) ◽

pp. 383-392 ◽

Cited By ~ 1

Author(s):

Toshiaki Saito

Keyword(s):

Color Difference ◽

Resin Cement ◽

Adhesive Resin ◽

All Ceramic ◽

Adhesive Resin Cement ◽

Ceramic Restorations

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Damage of lithium-disilicate all-ceramic restorations by an experimental self-adhesive resin cement used as core build-ups

Clinical Oral Investigations ◽

10.1007/s00784-014-1263-9 ◽

2014 ◽

Vol 19 (2) ◽

pp. 281-288 ◽

Cited By ~ 8

Author(s):

G. Sterzenbach ◽

G. Karajouli ◽

R. Tunjan ◽

T. Spintig ◽

K. Bitter ◽

...

Keyword(s):

Lithium Disilicate ◽

Resin Cement ◽

Adhesive Resin ◽

All Ceramic ◽

Adhesive Resin Cement ◽

Ceramic Restorations

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Chromatic Study of All-Ceramic Crown. The Effect of Crown Thickness and Adhesive Resin Cement on Metal Core Abutment.

Nihon Hotetsu Shika Gakkai Zasshi ◽

10.2186/jjps.42.445 ◽

1998 ◽

Vol 42 (3) ◽

pp. 445-455 ◽

Cited By ~ 1

Author(s):

Kazushige Kawahara

Keyword(s):

Resin Cement ◽

Metal Core ◽

Adhesive Resin ◽

All Ceramic ◽

Adhesive Resin Cement ◽

Ceramic Crown

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Influence of cement type on the fracture resistance of resin nanoceramic crowns over knife-edge margins: A pilot study

Revista Portuguesa de Estomatologia Medicina Dentária e Cirurgia Maxilofacial ◽

10.24873/j.rpemd.2021.09.844 ◽

2021 ◽

Vol 62 (3) ◽

Author(s):

Joana Guerreiro ◽

◽

Rafael Dias ◽

José Carracho ◽

◽

...

Keyword(s):

Fracture Resistance ◽

Glass Ionomer Cement ◽

Resin Cement ◽

Knife Edge ◽

Adhesive Resin ◽

Resin Modified Glass Ionomer ◽

Cad Cam ◽

Adhesive Resin Cement ◽

Group 2 ◽

Ionomer Cement

Objective: To evaluate the influence of the type of cement on the fracture resistance of full-contour resin nanoceramic crowns cemented over preparations with knife-edge margins. Methods: A right lower premolar typodont model was prepared with a 1.5-mm axial reduction, a 2.0-mm occlusal reduction, and a knife-edge vertical margin. An anatomical crown was designed from the digital scanning of the preparation using CAD/CAM software. Then, 20 crowns were milled from resin nanoceramic CAD/CAM blocks (Cerasmart270™) as well as a replica of the dental preparation in a cobalt-chrome alloy. The 20 crowns were randomly divided into two groups. Group 1 crowns were cemented with self-adhesive resin cement (G-CEM LinkAce™) and group 2 crowns with resin-modified glass ionomer cement (FujiCEM™ 2). Subsequently, they were subjected to a loading test on an Instron universal testing machine until fracture occurred. The data were statistically analyzed using the parametric Student’s t-test (α=0.05). Results: The type of cement was shown to have a statistically significant effect on the crowns’ fracture resistance (p <0.001). Group 1 presented a mean of 1284.3±340.19 Newtons, much higher than the mean recorded in group 2, of 417.9±106.35 Newtons, with an increase of 207.3% in the fracture resistance after self-adhesive luting. Conclusions: Resin nanoceramic crowns cemented with self-adhesive resin cement showed considerably higher fracture resistance than those cemented with resin-modified glass ionomer cement.

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Effect of Adhesive Gap Setting on Fracture Resistance of All-ceramic Crowns

The Open Dentistry Journal ◽

10.2174/1874210602014010600 ◽

2020 ◽

Vol 14 (1) ◽

pp. 600-607

Author(s):

Mohammed Zahran

Keyword(s):

Fracture Strength ◽

Fracture Resistance ◽

Testing Machine ◽

Resin Cement ◽

All Ceramic ◽

Complete Failure ◽

Ceramic Crowns ◽

The Mean ◽

Adhesive Cement ◽

Cerec 3D

Background: Several factors might affect the fracture resistance of all-ceramic crowns, including cement thickness. Aim: To evaluate the influence of cement thickness on the fracture resistance. Objective: To determine the effect of varying the adhesive gap thickness on the fracture loads of all-ceramic CEREC 3D molar crowns. Methods: Standardized prepared epoxy resin molar dies (Viade Inc.) were fabricated. A standard molar crown was designed using a CEREC 3D machine (Sirona Dental Systems). Twenty-four crowns were milled from Vita Mark II blocks (Vita Zahnfabrik), using adhesive gap settings of 30, 60 and 90 µm (n=8). A dual-cure resin cement (PanaviaF 2.0, Kuraray) was used to cement the crowns to their respective dies, following manufacturer's recommendation. After 1 week of storage in distilled water at 37°C, each crown was loaded in compression until complete failure in a universal testing machine (Instron 8501) and fracture loads (N) were recorded. Fractured specimens were sectioned to determine cement thickness. Sections were examined using a traveling light microscope to measure cement thickness. Data were statistically analyzed using one-way ANOVA test and Pearson's correlation at (α=0.05). Results: The mean fracture loads and standard deviation values in N were 1,267.57 (122.82), 1,225.20 (179.46) and 1,180.76 (161.77) for the crowns with 30, 60 and 90µm, respectively. ANOVA indicated no significant differences among mean fracture strength values (p = 0.55). All crowns failed in a catastrophic mode and were not repairable. Conclusions: Adhesive cement gap as achieved with three CEREC 3D settings from 30 to 90µm had no significant effect on fracture strength of crowns made from Vita Mark II blocks.

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Effect of Surface Treatment of Two Ceramic Materials by Er,Cr:YSGG Laser Irradiation on The Shear Bond Strength to Resin Cement “A Comparative in-Vitro Study”

Brazilian Dental Science ◽

10.14295/bds.2020.v23i3.1950 ◽

2020 ◽

Vol 23 (3) ◽

Author(s):

Shahd Taha Mandil ◽

Hesham Katamish ◽

Tarek Salah

Keyword(s):

Bond Strength ◽

Surface Treatment ◽

Laser Irradiation ◽

Hydrofluoric Acid ◽

Shear Bond Strength ◽

Ceramic Materials ◽

Resin Cement ◽

Adhesive Resin ◽

Cad Cam ◽

Adhesive Resin Cement

Objective: The aim of this study is to assess the effect of Er,Cr:YSGG laser on the shear bond strength (SBS) and surface topography of two CAD/CAM ceramic materials bonded with self-adhesive resin cement. Material and methods: sixty ceramic CAD/CAM discs were obtained, 30 lithium disilicate (IPS Emax) and 30 hybrid resin ceramic (Vita Enamic). The Slices were allocated into six groups (n=10) according to ceramic material and surface treatment; Group (LD-C): IPS Emax treated with 9% hydrofluoric acid(HF), Groups (LD-P1) and (LD-P2): IPS Emax treated with Er,Cr:YSGG laser with parameters 1.5 W and 2.5 W, respectively. Group (RC-C): Vita Enamic treated with 9% hydrofluoric acid (HF), Groups (RC-P1) and (RC-P2): Vita Enamic treated with Er,Cr:YSGG laser with parameters 1.5 W and 2.5 W, respectively. All samples were cemented with self-adhesive resin cement and thermocycled for 5000 cycles. The SBS was measured using a universal testing machine and the mean values (MPa) were analyzed using Two-way (ANOVA) (P ≤ 0.05) and Bonferroni’s post-hoc test. Results: RC-C (16.55) showed highest SBS followed by LD-C (13.79), which revealed no statistically significant difference with RC-P1 (12.33) and RC-P2 (11.2). The lowest SBS values were found with LD-P1 (2.7) and LD-P2 (2.1). SEM analysis revealed Vita Enamic to have the highest surface roughness. Fracture pattern analysis showed adhesive failure with IPS Emax groups and mixed failure with Vita Enamic groups. Conclusion: Er,Cr:YSGG laser irradiation with the parameters used did not increase SBS of IPS Emax and Vita Enamic with composite resin compared to HF acid etching.KeywordsEr,Cr:YSGG laser; Shear bond strength; Surface treatment; Ceramic materials.

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A Study on Bond Strength of Adhesive Resin Cement. Influence of Temporary Cement Exerting All Ceramic Post Core.

Nihon Hotetsu Shika Gakkai Zasshi ◽

10.2186/jjps.43.251 ◽

1999 ◽

Vol 43 (2) ◽

pp. 251-259

Author(s):

Tsuyoshi Yoshida ◽

Hiroyasu Koizumi ◽

Hideaki Tanaka ◽

Yoshiyuki Kakehashi ◽

Takayoshi Igarashi

Keyword(s):

Bond Strength ◽

Resin Cement ◽

Adhesive Resin ◽

All Ceramic ◽

Adhesive Resin Cement

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Development of a Cavity Disinfectant Containing Antibacterial Monomer MDPB

Journal of Dental Research ◽

10.1177/0022034516663465 ◽

2016 ◽

Vol 95 (13) ◽

pp. 1487-1493 ◽

Cited By ~ 14

Author(s):

N. Hirose ◽

R. Kitagawa ◽

H. Kitagawa ◽

H. Maezono ◽

A. Mine ◽

...

Keyword(s):

Antibacterial Activity ◽

Bond Strength ◽

Bacterial Species ◽

Oral Bacteria ◽

Resin Cement ◽

Resin Cements ◽

Adhesive Resin ◽

Significant Difference ◽

Adhesive Resin Cement

An experimental cavity disinfectant (ACC) that is intended to be used for various direct and indirect restorations was prepared by adding an antibacterial monomer 12-methacryloyloxydodecylpyridinum bromide (MDPB) at 5% into 80% ethanol. The antibacterial effectiveness of ACC and its influences on the bonding abilities of resin cements were investigated. To examine the antibacterial activity of unpolymerized MDPB, the minimum inhibitory and bactericidal concentrations (MIC and MBC) were determined for Streptococcus mutans, Lactobacillus casei, Actinomyces naeslundii, Parvimonas micra, Enterococcus faecalis, Fusobacterium nucleatum, and Porphyromonas gingivalis. Antibacterial activities of ACC and the commercial cavity disinfectant containing 2% chlorhexidine and ethanol (CPS) were evaluated by agar disk diffusion tests through 7 bacterial species and by MIC and MBC measurement for S. mutans. The effects of ACC and CPS to kill bacteria in dentinal tubules were compared with an S. mutans–infected dentin model. Shear bond strength tests were used to examine the influences of ACC on the dentin-bonding abilities of a self-adhesive resin cement and a dual-cure resin cement used with a primer. Unpolymerized MDPB showed strong antibacterial activity against 7 oral bacteria. ACC produced inhibition zones against all bacterial species similar to CPS. For ACC and CPS, the MIC value for S. mutans was identical, and the MBC was similar with only a 1-step dilution difference (1:2). Treatment of infected dentin with ACC resulted in significantly greater bactericidal effects than CPS ( P < 0.05, analysis of variance and Tukey’s honest significant difference test). ACC showed no negative influences on the bonding abilities to dentin for both resin cements, while CPS reduced the bond strength of the self-adhesive resin cement ( P < 0.05). This study clarified that the experimental cavity disinfectant containing 5% MDPB is more effective in vitro than the commercially available chlorhexidine solution to eradicate bacteria in dentin, without causing any adverse influences on the bonding abilities of resinous luting cements.

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