Abstract：
OBJECTIVES:Ultrasound may offer a possible alternative to rotary instruments for removing bone. This study was undertaken to analyse in vitro the various factors that influence the cutting of bone by an ultrasonic chisel. STUDY DESIGN:A block of bovine femur was moved in a longitudinal direction under a stationary ultrasonic chisel. The force and depth of the cut was recorded for cutting rates of 28-112 mm/min and with increasing rake angles of 0 to +20 degrees. The pressure exerted by the chisel was recorded for different cutting rates. RESULTS:When the cutting rate increases there is a corresponding increase in the downward force which is followed by a decrease in the force at rates greater than 56 mm/min. The depth of the cut increases up to a rate of 56 mm/min after which it decreases. Both the longitudinal and downward forces do not change when the rake angle changes from 0 to +10 degrees. The downward force decreases when the rake angle increases from +10 to +20 degrees. CONCLUSIONS:The bone is cut slowly with the ultrasonic chisel, but this would assist in precision. Where such an instrument is used for cutting bone the clinicians should be aware that both low forces and cutting rates are required, and the instrument should be held at a low rake angle.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Khambay BS,Walmsley ADdoi
10.1016/s0300-5712(99)00044-5keywords:
subject
Has Abstractpub_date
2000-01-01 00:00:00pages
39-44issue
1eissn
0300-5712issn
1879-176Xpii
S0300-5712(99)00044-5journal_volume
28pub_type
杂志文章abstract：OBJECTIVE:To investigate the remineralisation of chitosan pre-treated enamel white spot lesions (WSLs) by bioglass in the presence of the pellicle layer. METHODS:50 artificial enamel white spot lesions were created by acidic gel. Two lesions were used to investigate the formation of the pellicle layer by treating with...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2018.02.004
更新日期：2018-05-01 00:00:00
abstract：OBJECTIVES:To determine the influence of two enamel conditioning techniques on buccal and lingual tooth surfaces at two different times on debonding strength and tooth damage. METHODS:The study included 50 premolars. Buccal and lingual surfaces of 10 teeth were scanned using SEM before (N=4) and after enamel condition...
journal_title：Journal of dentistry
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/j.jdent.2004.08.005
更新日期：2005-02-01 00:00:00
abstract：OBJECTIVES:To evaluate the effect of the addition of epigallocatechin-3-gallate (EGCG) on the antibacterial and physical properties of glass ionomer cement (GIC). METHODS:A conventional GIC, Fuji IX, was used as a control. EGCG was incorporated into GIC at 0.1% (w/w) and used as the experimental group. Chlorhexidine (...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2013.07.014
更新日期：2013-10-01 00:00:00
abstract：OBJECTIVES:This systematic review aimed to verify if there is difference in the longevity of minimally invasive techniques compared to the complete replacement for the treatment of defective direct restorations in permanent teeth. DATA:The data included randomized controlled clinical trials comparing the clinical perf...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2018.09.001
更新日期：2018-11-01 00:00:00
abstract：OBJECTIVES:Toothbrushing and interdental cleaning are critical to maintaining good oral health. Literature is beginning to suggest that these behaviours may be conducted automatically, although the instigation ('deciding to do') and execution ('doing') of these behaviours has never been examined separately. The objecti...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2020.103470
更新日期：2020-11-01 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：OBJECTIVES:To evaluate the efficacy of different bleaching systems on artificially created stained-remineralized caries lesions; and to assess the susceptibility of the bleached lesions to further demineralization. METHODS:Human enamel specimens were sectioned, polished, demineralized, and randomly divided into six gr...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2018.12.008
更新日期：2019-02-01 00:00:00
abstract：OBJECTIVE:To analyse the DIAGNOdent's performance to longitudinally monitor the arrestment of non-cavitated carious lesions in occlusal surfaces. METHODS:The sample consisted of 15 children (12-13 years old) with 40 active non-cavitated lesions. The protocol for the examinations was: prophylaxis, drying teeth for 30s;...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2007.05.005
更新日期：2007-08-01 00:00:00
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:To assess sustainability of shortened dental arches (SDA) by determining time to 'first restorative intervention' of teeth and time to 'tooth loss' and comparing these outcomes with complete dental arches (CDA) and SDA plus removable dental prostheses (RDP). METHODS:Data (follow-up time ranged from 27.4 (SD...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2013.05.013
更新日期：2013-08-01 00:00:00
abstract：OBJECTIVES:The tooth-resin bond is the weak link of restoration, with secondary caries as a main reason for failure. Calcium phosphate-containing resins are promising for remineralization; however, calcium (Ca) and phosphate (P) ion releases last only a couple of months. The objectives of this study were to develop the...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2015.06.009
更新日期：2015-12-01 00:00:00
abstract：OBJECTIVE:To investigate the effects of Halloysite® aluminosilicate clay nanotubes (HNTs) addition on selected physical, mechanical, and biological properties of experimental adhesive resins. METHODS:Experimental dentin adhesive resins were prepared by mixing Bis-GMA, TEGDMA, HEMA (50/25/25wt.%), and photo-initiators....
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2015.08.014
更新日期：2015-11-01 00:00:00
abstract：OBJECTIVE:To evaluate the content of inorganic particles and the flexural strength of new condensable composites for posterior teeth in comparison to hybrid conventional composites. METHOD:The determination of the content of inorganic particles was performed by mass weighing of a polymerized composite before and after...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(03)00049-6
更新日期：2003-07-01 00:00:00
abstract：PURPOSE:This study determined the shear bond strength of a nanohybrid composite resin to bleached enamel immediately or 15 days later using different adhesive systems and laser application. METHODS:One hundred and forty enamel specimens were prepared from human molar teeth and bleached either with 16% carbamide peroxi...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2009.03.012
更新日期：2009-07-01 00:00:00
abstract：OBJECTIVES:To investigate the influence of matrix and filler content on degradation resistance of an experimental pure-ormocer and an dimethacrylate-based composite derived from a commercially available material. MATERIALS AND METHODS:A dimethacrylate- Grandio (GR) and a model pure ormocer-based-matrix ORMOCER (ORM) w...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2011.10.012
更新日期：2012-01-01 00:00:00
abstract：OBJECTIVE:to assess the expectations, perceptions and performance of different operators with varying backgrounds and training in the use of full-arch intraoral scanning (IOS). METHODS AND MATERIALS:Dentists (DENT), postgraduate dental students (DPG), and student prosthetists (PROS) were invited to join an IOS trainin...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2020.103572
更新日期：2020-12-29 00:00:00
abstract：OBJECTIVES:Failure of the enamel adjacent to the defects in teeth with molar incisor hypomineralization (MIH) limits the success rate of the restorations placed in these teeth and this frequently leads to their ultimate extraction. To understand the cause, a state-of-the-art combination of focused ion beam (FIB) and na...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2009.11.003
更新日期：2010-03-01 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：OBJECTIVE:The aim of this study was to identify factors influencing the selection of restorative materials. METHODS:In 1992, a random sample of Finnish dentists working in the public and private health care sectors were asked to provide information on restorative treatments during a given period. The study material co...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/0300-5712(95)00070-4
更新日期：1996-07-01 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：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：:Maximum lateral forces as measured by strain gauges mounted on the analysing rod of a Nesor surveyor for four operators during surveying procedures ranged from 81 to 110 cN (mean 92.4 cN). Maximum lateral forces used when trimming blockout and inlay wax ranged from 159 to 184 cN (mean 169 cN) and 137 to 196 cN (mean 1...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/0300-5712(91)90012-n
更新日期：1991-06-01 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 hydrothermal aging (H), mechanical cycling (M), and the combination of hydrothermal plus mechanical cycling (H+M) on biaxial flexural strength (BFS) and microstructure of two monolithic zirconias, indicated for anterior (AMZ) or posterior restorations (PMZ) and a conventional zircon...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2017.05.021
更新日期：2017-08-01 00:00:00
abstract：OBJECTIVE:This randomized controlled trial compared the survival of glass fibre and cast metal dental posts used to restore endodontically treated teeth with no remaining coronal wall. METHODS:Fifty-four participants (45 women) and 72 teeth were evaluated during a follow-up period of up to 3 years. Teeth were randomly...
journal_title：Journal of dentistry
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jdent.2014.02.003
更新日期：2014-05-01 00:00:00
abstract：OBJECTIVES:In some studies gap formation has been evaluated in just one section of the restorative. This in vitro study aimed to design a quantitative three-dimensional method for evaluation of the contraction gap in restoratives. METHODS:Cervical cavities were prepared on buccal, palatal or lingual surfaces in human ...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2004.10.001
更新日期：2005-04-01 00:00:00
abstract：OBJECTIVES:To evaluate the changes in oral health-related quality of life (OHRQoL) reported by subjects treated with conventional prostheses. METHODS:A consecutive sample of 153 patients seeking prosthodontic rehabilitation was recruited. Socio-demographic and prosthetic-related factors (Eichner Index; number of occlu...
journal_title：Journal of dentistry
pub_type： 临床试验,杂志文章
doi：10.1016/j.jdent.2013.01.006
更新日期：2013-06-01 00:00:00
abstract：OBJECTIVES:Verify the influence of curing methods on contraction stress, stress rate, and degree of conversion (DC) of a restorative composite and on bond strength of composite restoratives. METHODS:For the stress test, composite (0.84 mm thick) was applied between two 5-mm diameter glass rods, mounted in a servohydra...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2006.10.003
更新日期：2007-04-01 00:00:00
abstract：OBJECTIVES:Firstly, to evaluate the in vitro anti-erosion efficacy of a new mouthrinse formulation containing 450 ppm fluoride using profilometry and microindentation. Secondly, to compare fluoride uptake by erosive lesions from two mouthrinses containing different fluoride sources using dynamic secondary ion mass spec...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/S0300-5712(11)70004-5
更新日期：2010-11-01 00:00:00
abstract：OBJECTIVES:The main objective is the characterisation of the setting reaction in glass ionomer cements based on experimental ionomer glasses with different fluorine content and a commercial glass ionomer cement liquid by using 13C CP/MAS-NMR, 29Si, 27Al and 31P MAS-NMR spectroscopy in order to receive information speci...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2005.08.006
更新日期：2006-09-01 00:00:00
