Abstract:
:This study evaluated the influence of ceramic thickness and ceramic materials on fracture resistance of posterior partial coverage ceramic restorations. Forty extracted molars were allocated into four groups (n=10) to test for two variables: 1) the thickness of ceramic (1 mm or 2 mm) and 2) the ceramic materials (a lithium disilicate glass-ceramic [IPS e.max] or leucite-reinforced glass ceramic [IPS Empress]). All ceramic restorations were luted with resin cement (Variolink II) on the prepared teeth. These luted specimens were loaded to failure in a universal testing machine, in the compression mode, with a crosshead speed of 1.0 mm/min. The data were analyzed using two-way analysis of variance and the Tukey Honestly Significantly Different multiple comparison test (α =0.05). The fracture resistance revealed a significant effect for materials (p<0.001); however, the thickness of ceramic was not significant (p=0.074), and the interaction between the thickness of ceramic and the materials was not significant (p=0.406). Mean (standard deviation) fracture resistance values were as follows: a 2-mm thickness of a lithium disilicate bonded to tooth structure (2505 [401] N) revealed a significantly higher fracture resistance than did a 1-mm thickness of leucite-reinforced (1569 [452] N) and a 2-mm thickness of leucite-reinforced ceramic bonded to tooth structure (1716 [436] N) (p<0.05). There was no significant difference in fracture resistance values between a lithium disilicate ceramic at 1-mm thickness (2105 [567] N) and at 2-mm thickness. Using a lithium disilicate glass ceramic for partial coverage restoration significantly improved fracture resistance compared to using a leucite-reinforced glass ceramic. The thickness of ceramic had no significant effect on fracture resistance when the ceramics were bonded to the underlying tooth structure.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Bakeman EM,Rego N,Chaiyabutr Y,Kois JCdoi
10.2341/12-459-Lsubject
Has Abstractpub_date
2015-03-01 00:00:00pages
211-7issue
2eissn
0361-7734issn
1559-2863journal_volume
40pub_type
杂志文章abstract::This in vitro study assessed the effect of a step-cure light curing method on resin/dentin bond strength on the buccal wall of Class I cavities in human teeth. Occlusal enamel was removed to expose a flat dentin surface. Twenty four box-shaped cavities (C-factor = 4.5) were prepared in dentin. Prime&Bond 2.1 was appli...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/05-37
更新日期:2006-05-01 00:00:00
abstract::The effect of interdental separation of a special separation ring and wooden wedge was investigated. In a split-mouth design, 27 patients were randomly assigned to one of two groups (W or S). In 11 patients, an interdental wooden wedge (Hawe-Neos) was placed (group W), and in 16 patients, a separation ring (Composi-Ti...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/06-73
更新日期:2007-05-01 00:00:00
abstract::A fundamental issue of restorative treatment is assessing the different conditions of cases not only from tooth-to-tooth but also from the activity of each caries lesion and the size of the cavity. In addition, restorative treatment is sometimes carried out for prosthetic and cosmetic purposes and involves cutting sou...
journal_title:Operative dentistry
pub_type:
doi:
更新日期:2002-05-01 00:00:00
abstract:OBJECTIVE::Computer aided design-computer aided machining (CAD-CAM) ceramic crowns are replacing ceramo-metal ones due to newly developed mechanical properties and esthetics. To obtain knowledge about their interactions due to polishing and occlusal contacts with the opposing dental enamel specimen, including surface r...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/17-153-L
更新日期:2019-01-01 00:00:00
abstract:OBJECTIVE::The study aimed to evaluate teaching trends and use of materials in direct posterior restorations during a 13-year period in an Israeli dental school. METHODS::Data registered in computerized files, relating to posterior restorations performed in the student clinic during the past 13 years (2004-2016), were...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/17-361-C
更新日期:2018-11-01 00:00:00
abstract::Under clinical conditions, the time needed for the proper light curing of luting composites or the multi-incremental buildup of a large restoration with halogen curing units is quite extensive. Due to the development of high power curing devices, such as argon lasers and plasma arc lights and, in order to decrease cur...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/06-79
更新日期:2007-05-01 00:00:00
abstract:INTRODUCTION:Adding antibacterial agents to a dentin conditioner used for a glass ionomer cement (GIC) has been shown to be antibacterial; however, it is not known whether this antimicrobial conditioning agent affects the bond strength to dentin in situ. This study applied GIC to antibacterial conditioned dentin withou...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2005-05-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to present a case report of a patient affected by amelogenesis imperfecta showing a possible minimal and conservative adhesive treatment approach. CLINICAL PROCEDURE:A treatment philosophy of amelogenesis imperfecta is illustrated by means of a case report of a 14-year-old boy who c...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/11-437-S
更新日期:2013-05-01 00:00:00
abstract:PURPOSE:This study evaluated the effect of thermocycling on the microtensile bond strength of four adhesive luting agents to GN-I CAD-CAM ceramic. The hypothesis tested was that thermocycling did not affect bonding effectiveness, irrespective of the luting agents used. MATERIALS AND METHODS:Ceramic specimens of two di...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/06-106
更新日期:2007-07-01 00:00:00
abstract::Most currently marketed fluoride varnishes (FVs) have not been evaluated for their effectiveness in preventing dental caries. The objective of this study was to investigate the anticaries efficacy, measured as fluoride release into artificial saliva (AS); change in surface microhardness of early enamel caries lesions;...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/18-040-L
更新日期:2019-09-01 00:00:00
abstract::In this laboratory study, the microtensile bond strengths (μTBS) of resin-modified glass ionomer cement (RM-GIC) to sound and artificial caries-affected bovine root dentin (ACAD) using three different conditioning agents were evaluated after 24 hours and three months. The fractured interface was examined with a scanni...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/16-375-L
更新日期:2017-11-01 00:00:00
abstract::Of the many factors under their control, clinicians can manipulate light-exposure duration but must deal with a set intensity of light emitted from the dental curing unit. This research investigates the interdependence of exposure duration and source intensity on resin cure at various depths within a simulated light-c...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:1994-01-01 00:00:00
abstract::The purpose of this double-blind clinical trial was to compare the retention rate in noncarious Class V lesions of two resin-based composite restorative materials with contrasting stiffness. Isolation with retraction cord, pressed paper triangles, and cotton rolls was used to closely mimic the procedures generally use...
journal_title:Operative dentistry
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:2000-01-01 00:00:00
abstract::This study evaluated the two-year clinical performance of two minimally invasive cavity preparation techniques, bur and laser, in Class I occlusal resin composite restorations. Twenty-seven patients, each having at least one pair of occlusal caries, were enrolled in this study. For each patient, one of the cavities wa...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/09-339-C
更新日期:2010-09-01 00:00:00
abstract:OBJECTIVES::The use of high-viscosity glass-ionomer cements (HVGICs) for atraumatic restorative treatment (ART) restorations is widely practiced with the advent of various HVGICs. However, the bonding of the latter to caries-affected dentin (CAD) should be validated, especially because it is the common substrate left a...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/17-154-L
更新日期:2018-11-01 00:00:00
abstract:OBJECTIVES:To evaluate the efficacy of a new light-cured anesthetic gel for pain control in adults undergoing rubber dam isolation for the restorative treatment of noncarious cervical lesions (NCCLs). METHODS AND MATERIALS:This study was a randomized, split-mouth, triple-blind, controlled trial. The sample comprised 5...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/18-130-C
更新日期:2020-03-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to evaluate the effects of different desensitizing agents on the prevention of root caries when applied to root surfaces. MATERIALS AND METHODS:Thirty human roots were sectioned into quarters with a 3 × 4 mm window. A desensitizer (VX, Clinpro™ XT Varnish; SP, Seal & Protect®; o...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/11-007-L
更新日期:2012-05-01 00:00:00
abstract:PURPOSE:This prospective long-term clinical trial evaluated and compared the three-year clinical performance of an ormocer, a nanofilled, and a nanoceramic resin composite with that of a microhybrid composite placed in Class I and Class II cavities. METHODS:Forty patients, each with four Class I and II restorations un...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/12-313-C
更新日期:2014-01-01 00:00:00
abstract::This study compared the surface finish of eight different types of aesthetic restorative materials. The materials included resin-modified (Fuji II LC [FL], GC) and highly viscous (Fuji IX GP Fast [FN], GC) glass ionomer cements, a compomer (F2000 [FT], 3M-ESPE), minifilled (Z100 [ZO], 3M-ESPE) and microfilled (A110 [A...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2004-01-01 00:00:00
abstract:OBJECTIVES:The aim of this investigation was to test the tensile bond strength (TBS) between different computer-aided-design/manufacturing (CAD/CAM) ceramics after conditioning using different universal adhesive systems and resin composite cement. METHODS AND MATERIALS:Substrates of four CAD/CAM ceramics-1) VITABLOCS ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/18-017-L
更新日期:2019-07-01 00:00:00
abstract:PURPOSE::The purpose of this study was to quantify the relative strength tolerance of 1-day and 30-day amalgam following saturation contamination with water, saliva, blood, and handpiece lubricant oil during condensation. METHODS AND MATERIALS::Valiant PhD XT amalgam was tested with 300 shear-strength (N=15) and 120 c...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/18-091-L
更新日期:2019-03-01 00:00:00
abstract::The current study evaluated the chromatic influence of high, medium and low value composites on a dentin composite substrate (A2 shade) using spectrophotometric analysis. The specimens were divided into the following four groups: a) control (CG), entirely composed of dentin composite (n = 5); b) high value (GHV), dent...
journal_title:Operative dentistry
pub_type: 杂志文章,随机对照试验
doi:10.2341/09-44-L
更新日期:2010-01-01 00:00:00
abstract:CLINICAL RELEVANCE:The degree of conversion of contemporary universal adhesives positively correlates with the bond strength to dentin. The correlation is more marked after thermocycling, suggesting that a high degree of conversion is required for long-term dentin bonding durability. SUMMARY:Purpose: The objectives of...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/19-165-L
更新日期:2020-09-01 00:00:00
abstract::This study evaluated the effect of two dentin disinfectants (Consepsis, Tubulicid), one aqueous HEMA solution (Aqua Prep), a combination of Aqua Prep and Tubulicid and an air abrasion treatment (50 microns aluminum oxide) on the shear bond strength (SBS) of two acetone-based single bottle adhesives (One Step and Prime...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:
更新日期:2001-11-01 00:00:00
abstract::Post-operative sensitivity (POS) may be observed in recently placed posterior composites. Evidence-based guidelines for the management of posterior composites with POS have yet to be determined. This study examined a retrospective analysis of the findings of a unique multi-center clinical trial to investigate the five...
journal_title:Operative dentistry
pub_type: 临床试验,杂志文章,多中心研究
doi:
更新日期:2003-11-01 00:00:00
abstract:PURPOSE:This study evaluated the amount of residual yellow in cured resin composites when polymerizing with either a quartz-tungsten-halogen (QTH) or blue light-emitting diode (LED). MATERIAL AND METHODS:Twelve shades (bleaching to conventional shades) of microfill, hybrid and microhybrid resin composite specimens (n ...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/06-129
更新日期:2007-09-01 00:00:00
abstract::This investigation examined the susceptibility to staining and translucency changes of some new tooth-colored restorative materials after immersion in different beverages. The materials studied were 3M Filtek Z350XT (ZT), 3M Filtek 350XT Flowable Restorative (ZF), Shofu Beautifil Flow Plus (BF), Shofu Beautifil II (B2...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/149027-L
更新日期:2015-03-01 00:00:00
abstract::The nature of the hybrid layer (HL) following chemical treatment has not been resolved. The effects of chemical treatments and polishing on HL morphology and composition were investigated using micro-Raman spectroscopy and SEM. Polished and unpolished SingleBond adhesive/dentin (a/d) interfaces from the same tooth wer...
journal_title:Operative dentistry
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:2004-11-01 00:00:00
abstract::This study compared the thickness of the hybrid layer formed using Scotchbond Multi-Purpose Plus, Single Bond 2, Prime & Bond 2.1 and Xeno III on a dentin surface prepared with a diamond bur in a high speed handpiece or prepared with an Er:YAG laser used with two parameters of pulse energy (200 and 400 mJ) and two par...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/07-84
更新日期:2008-05-01 00:00:00
abstract::Bonding to enamel has been shown to provide reliable results, and thus conservative tooth preparations are key to the success of ceramic bonded restorations. The wax-up is the first diagnostic tool available to evaluate discrepancies between current and ideal tooth proportions. The clinician's diagnostic mock-up provi...
journal_title:Operative dentistry
pub_type: 杂志文章
doi:10.2341/19-051-T
更新日期:2020-05-01 00:00:00