Abstract：
:Some laboratory tests of impression material accuracy mimic the clinical situation (simulatory) while others attempt to quantify a material's individual properties. This review concentrates on simulatory testing and aims to give a classification of the numerous tests available. Measurements can be made of the impression itself or the resulting cast. Cast measurements are divided into those made of individual dies and those made of interdie relations. Contact measurement techniques have the advantage of simplicity but are potentially inaccurate because of die abrasion. Non-contact techniques can overcome the abrasion problem but the measurements, especially those made in three dimensions, may be difficult to interpret. Nevertheless, providing that care is taken to avoid parallax error non-contact methods are preferable as experimental variables are easier to control. Where measurements are made of individual dies these should include the die width across the finishing line, as occlusal width measurements provide only limited information. A new concept of 'differential die distortion' (dimensional difference from the master model in one plane minus the dimensional difference in the perpendicular plane) provides a clinically relevant method of interpreting dimensional changes. Where measurements are made between dies movement of the individual dies within the master model must be prevented. Many of the test methods can be criticized as providing clinically unrealistic master models/dies or impression trays. Phantom head typodonts form a useful basis for the morphology of master models providing that undercuts are standardized and the master model temperature adequately controlled.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Wassell RW,Abuasi HAdoi
10.1016/0300-5712(92)90117-ukeywords:
subject
Has Abstractpub_date
1992-04-01 00:00:00pages
108-14issue
2eissn
0300-5712issn
1879-176Xpii
0300-5712(92)90117-Ujournal_volume
20pub_type
杂志文章,评审abstract：OBJECTIVES:The aim of this study was to determine whether conventional black tea and a herbal tea were capable of eroding dental enamel. A further aim was to investigate whether herbal tea of the type tested eroded dental hard tissues to a greater or lesser extent than conventional black tea. METHODS:Three groups of 2...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(01)00044-6
更新日期：2001-11-01 00:00:00
abstract：OBJECTIVES:Secondary caries at the tooth-restoration margins is a primary reason for restoration failure. Cracks at the margins lead to leakage which can trap bacteria, producing acids to cause caries. To date, there has been no report on developing an adhesive resin that has self-healing, antibacterial and remineraliz...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2018.05.009
更新日期：2018-08-01 00:00:00
abstract：OBJECTIVES:To evaluate the effect of using a bulk-fill flowable base material on fracture strength and fracture patterns of root-filled maxillary premolars with MOD preparations restored with laminate restorations. METHODS:Fifty extracted maxillary premolars were selected for the study. Standardized MOD cavities with ...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2017.05.016
更新日期：2017-08-01 00:00:00
abstract：OBJECTIVES:The purpose of this study was to evaluate the in vitro effectiveness of a new bioglass-containing and two commercial desensitising toothpastes on dentinal tubule occlusion after citric acid challenge or artificial saliva (AS) immersion. METHODS:One hundred dentin discs from human third molars were used. Spe...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2010.01.007
更新日期：2010-05-01 00:00:00
abstract：OBJECTIVES:To measure the shear bond strengths of various luting cements to a sandblasted zirconia ceramic and to determine the surface energy parameters of the luting cements. METHODS:Two conventional glass ionomer cements, two resin-modified glass ionomer cements, two compomer cements, and two adhesive resin cements...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2011.08.012
更新日期：2011-11-01 00:00:00
abstract：OBJECTIVE:Sodium hexametaphosphate (SHMP) is a widely used industrial preservative commonly found in children's drinks. In this paper we examined the effect of SHMP incorporated into children's drinks on acid production by the oral biofilm by monitoring salivary concentrations of lactic acid. MATERIALS AND METHOD:Twel...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2006.08.003
更新日期：2007-03-01 00:00:00
abstract：OBJECTIVES:To examine if there is a difference in possible sleep bruxism activity (SB) in subjects with or without attrition-type tooth wear. METHODS:Sixteen individuals with pronounced attritional-type tooth wear were compared with sex and aged matched controls without tooth wear by means of measurement of electromyo...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2015.10.002
更新日期：2015-12-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to investigate the influence of shortening the etching time on the bond strength of a conventional and a self-etching primer adhesive system used in primary tooth dentin. METHODS:Flat dentin surfaces were obtained from 24 primary molars, randomly assigned to 4 experimental groups. T...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2004.10.011
更新日期：2005-05-01 00:00:00
abstract：OBJECTIVES:This study investigated the in-vitro performance and fracture force of anterior implant-supported tooth-coloured fixed dental prosthesis (FDPs). Different material types with varying flexural strength and modulus of elasticity were compared with screw-retained or bonded application. MATERIALS AND METHODS:Id...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2020.103326
更新日期：2020-05-01 00:00:00
abstract：OBJECTIVES:The purpose of this study was to determine the dentine fluoride uptake from three fluoride-containing composites (FluorEver, FluoroCore and Pertac-Hybrid) and to investigate their ability to affect the resistance of dentine to an artificial caries challenge. METHODS:Three dentine slabs were prepared from ea...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(96)00045-0
更新日期：1997-05-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to compare the behavior of two new, low-shrinkage hybrid composites (Aelite LS and Inten-S) with a microfilled (Heliomolar) and a hybrid composite (Filtek Z250), in terms of polymerization contraction stress and microleakage. METHODS:Maximum contraction stress after 10 min was recor...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2004.01.014
更新日期：2004-07-01 00:00:00
abstract：:This satellite symposium was the fourth in a series for editors, publishers, reviewers and all those with an interest in scientific publishing. It was held on Wednesday 25th June 2014 at the IADR International meeting in Cape Town, South Africa. The symposium attracted more than 180 attendees. This symposium placed an...
journal_title：Journal of dentistry
pub_type：
doi：10.1016/j.jdent.2015.02.007
更新日期：2015-08-01 00:00:00
abstract：OBJECTIVE:The fracture of bonded ceramic to metal restorations remains a problem in clinical dental practice. The use of resin based composites to repair such fractures is generally unsatisfactory. Tribochemical technology creates a surface layer of small silica particles fused to the surface substrate. Such a layer po...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(00)00006-3
更新日期：2000-08-01 00:00:00
abstract：:The complexity of the oral environment, and ethical problems associated with studies of oral diseases in humans inevitably directed the attention to development of laboratory models, that simulate the human oral microcosm. These developments and in particular the in vitro 'artificial mouth' systems have progressed fro...
journal_title：Journal of dentistry
pub_type： 杂志文章,评审
doi：10.1016/s0300-5712(03)00009-5
更新日期：2003-03-01 00:00:00
abstract：OBJECTIVES:Health condition of the gingival tissues contacting the surfaces of fixed prostheses is a result of multiple etiologic factors. The aim of the investigation discussed here was to evaluate the attachment and proliferation rate of cultured human epithelial cells on three commonly used restorative materials und...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2013.11.008
更新日期：2014-01-01 00:00:00
abstract：OBJECTIVE:Following a successful 2005-2012 phase with three regional practice-based research networks (PBRNs), a single, unified national network called "The National Dental PBRN" was created in 2012 in the United States to improve oral health by conducting practice-based research and serving dental professionals throu...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2013.04.002
更新日期：2013-11-01 00:00:00
abstract：:Evidence exists that plasma F- concentrations of 1.0 part/10(6) are nephrotoxic and that much lower levels disturb enamel mineralization. Ingested F(-)-containing gels, tablets and toothpastes all raise plasma F- levels significantly, as does prolonged exposure to fluorine-containing anaesthetic gases. There is, there...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/0300-5712(90)90254-c
更新日期：1990-02-01 00:00:00
abstract：OBJECTIVES:The purpose of this study was to determine the longevity and quality of Class I and Class II resin composite (Herculite XR) restorations placed in private practice. METHODS:One thousand two hundred and nine Class I and Class II composite restorations with margins in enamel were evaluated clinically after pe...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(96)00027-9
更新日期：1997-05-01 00:00:00
abstract：OBJECTIVES:Root canal treatment forms an essential part of general dental practice. Sodium hypochlorite (NaOCl) is the most commonly used irrigant in endodontics due to its ability to dissolve organic soft tissues in the root canal system and its action as a potent antimicrobial agent. Although NaOCl accidents created ...
journal_title：Journal of dentistry
pub_type： 杂志文章,评审
doi：10.1016/j.jdent.2013.08.012
更新日期：2013-11-01 00:00:00
abstract：OBJECTIVES:To evaluate the influence of tooth bleaching on the opalescence properties of enamel. METHODS:Color of 38 specimens was determined by colorimetric analysis before and after bleaching in the reflectance and transmittance modes. The results were described as CIELab color coordinates. The Opalescent Parameter ...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2012.01.011
更新日期：2012-07-01 00:00:00
abstract：OBJECTIVE:To study the combined effect of simulated occlusal loading and plaque-derived biofilm on the interfacial integrity of dental composite restorations, and to explore whether the effects are modulated by the incorporation of sucrose. METHODS:MOD-class-II restorations were prepared in third molars. Half of the s...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2017.08.009
更新日期：2017-11-01 00:00:00
abstract：OBJECTIVES:Probiotics might be beneficial to prevent or treat caries, gingivitis or periodontitis. We aimed to appraise trials assessing probiotics for managing caries and periodontal disease. DATA:We included randomized controlled trials comparing the efficacy of probiotics versus (placebo) control with regards to St...
journal_title：Journal of dentistry
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.jdent.2016.03.002
更新日期：2016-05-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to evaluate the effect of sealant placement on the detection of caries by a fluorescent camera (FC), the Spectra caries detector. MATERIALS AND METHODS:In a laboratory study, FC images and readings were obtained from 31 extracted teeth, before and following application of clear seal...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2013.05.005
更新日期：2013-07-01 00:00:00
abstract：:The polymeric materials currently used in GIC are based on poly(acrylic acid), poly(acrylic acid-co-itaconic acid), or poly(acrylic acid-co-maleic acid). For the visible light cured (VLC) type GIC, the polymeric material is chemically modified to have pendant free-radical polymerizable double bonds, with the aqueous f...
journal_title：Journal of dentistry
pub_type： 杂志文章,评审
doi：10.1016/j.jdent.2005.08.008
更新日期：2006-09-01 00:00:00
abstract：OBJECTIVES:The objectives of this study were two-fold: (1) to determine (by surfometry) loss of deciduous and permanent enamel and dentine following 15days' exposure to a single low pH orange drink; and (2) to determine (by surfometry) loss of deciduous and permanent enamel and dentine following exposure to the product...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(99)00074-3
更新日期：2000-05-01 00:00:00
abstract：OBJECTIVE:To compare near infrared transillumination device, DIAGNOcam (DC) and bitewing radiography (BW) for the detection of proximal caries. MATERIALS AND METHODS:This retrospective analysis of DC and BW images of 18 students in dental medicine who had consented to the anonymous use of their dental record. The data...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2017.12.008
更新日期：2018-03-01 00:00:00
abstract：OBJECTIVES:The bonding of resin to dentine is dependent largely on surface modifications. The purpose of the present study was to test the hypothesis that a role of the metal chlorides used as primers is to initiate polymerization of resin at the resin-dentine interface, thereby affecting bond strength. METHODS:Nine p...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(97)00030-4
更新日期：1998-09-01 00:00:00
abstract：OBJECTIVE:The intent of this project was to evaluate the efficiency of three commercial amalgam separators based on mercury and particle removal. METHODS:Dental wastewater samples were collected from a 54-chair dental clinic and a one chair private dental office. Atomic absorption spectrometry was used to measure merc...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(02)00067-2
更新日期：2003-01-01 00:00:00
abstract：OBJECTIVES:The objectives of this study were to: (1) develop a novel multifunctional composite with nanoparticles of silver (NAg), 2-methacryloyloxyethyl phosphorylcholine (MPC), dimethylaminohexadecyl methacrylate (DMAHDM) and nanoparticles of amorphous calcium phosphate (NACP); and (2) investigate biofilm-inhibition ...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2018.12.001
更新日期：2019-02-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to evaluate restorations, previously placed in clinical trials, for the rate of wear of the proximal surfaces, by tooth position. MATERIALS AND METHODS:Seventy resin composite restorations were evaluated in bicuspids and molars. Fifty restorations were direct placement restorati...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/0300-5712(95)00040-2
更新日期：1996-01-01 00:00:00
