The effect of energy application sequence on the microtensile bond strength of different C-factor cavity preparations

G Maghaireh; M R Bouschlicher; F Qian; S R Armstrong

doi:10.2341/06-30

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The effect of energy application sequence on the microtensile bond strength of different C-factor cavity preparations

Journal article

Peer reviewed

The effect of energy application sequence on the microtensile bond strength of different C-factor cavity preparations

G Maghaireh, M R Bouschlicher, F Qian and S R Armstrong

Operative dentistry, Vol.32(2), pp.124-132

03/2007

DOI: 10.2341/06-30

PMID: 17427820

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Abstract

This study investigated the effect of three equivalent radiant exposure energy application sequences (EASs): high intensity power (HIP: 1,177 mW/cm2, 40 seconds), low intensity power (LOP: 573 mW/cm2, 71 seconds) and ramp (RMP: 650 mW/cm2, 5 seconds, then the irradiance increases to 1047 mW/cm2, 37 seconds) on the microtensile bond strength (MTBS) in both low and high C-factor cavity preparations. Thirty Paradigm blocks (Z100) were mounted in stone, with their top surfaces parallel to the mounting block. High C-factor (HC = 3.8) Class I cavity preparations were then prepared in 15 of the Paradigm blocks using a computer-controlled specimen former. Low C-factor (LC = 1.8) Class II cavity preparations were prepared in the remaining 15 blocks by sectioning them perpendicularly using a slow-speed diamond saw. Five samples, one from each experimental group (3 EASs x 2 C-factors), were prepared and stored in the dark for 48 hours in distilled water at 37 degrees C prior to MTBS testing on the third day and on the remainder of the samples (n = 30). Mode of fracture was determined with a stereomicroscope at 20-40x magnification. The findings of this study indicated that HC, in combination with HIP, had significantly lower bond strength (27.54 MPa) than LC with HIP (51.39 MPa). On the other hand, there was no significant difference between high and low C-factors with the other EASs (LOP or RMP). There was also no significant effect for EAS (HIP, RAMP and LOP), with C-factor (HC or LC) held constant. The HIP-HC group had the highest percentage of adhesive (20%) and mixed adhesive (50%) failures (70% total). Adhesive and mixed adhesive failures occurred in other groups, but with lower percentages (RMP-LC: 40% total) (LOP-HC: 40% total).

Tensile Strength

Zirconium - radiation effects

Temperature

Polyurethanes - chemistry

Adhesiveness

Humans

Resin Cements - chemistry

Composite Resins - chemistry

Materials Testing

Radiation Dosage

Acrylic Resins - chemistry

Dental Cavity Preparation - classification

Composite Resins - radiation effects

Dental Materials - chemistry

Time Factors

Dental Materials - radiation effects

Light

Surface Properties

Zirconium - chemistry

Lighting - instrumentation

Water - chemistry

Dental Bonding

Acid Etching, Dental

Details

Title: Subtitle: The effect of energy application sequence on the microtensile bond strength of different C-factor cavity preparations
Creators: G Maghaireh - Department of Restorative Dentistry, Faculty of Dentistry, Jordan University of Science & Technology, Irbid 22110, Jordan
M R Bouschlicher
F Qian
S R Armstrong
Resource Type: Journal article
Publication Details: Operative dentistry, Vol.32(2), pp.124-132
Publisher: United States
DOI: 10.2341/06-30
PMID: 17427820
ISSN: 0361-7734
eISSN: 1559-2863
Language: English
Date published: 03/2007
Academic Unit: Preventive and Community Dentistry; Operative Dentistry; Dental Research
Record Identifier: 9984065712002771

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