Displaying publications 1 - 20 of 45 in total

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  1. Tapsir Z, Aly Ahmed HM, Luddin N, Husein A
    J Contemp Dent Pract, 2013 Jan 1;14(1):47-50.
    PMID: 23579892
    To evaluate and compare the microleakage of various restorative materials used as coronal barriers between endodontic appointments.
    Matched MeSH terms: Dental Cements/chemistry
  2. Ajay R, JafarAbdulla MU, Sivakumar JS, Baburajan K, Rakshagan V, Eyeswarya J
    J Contemp Dent Pract, 2023 Aug 01;24(8):521-544.
    PMID: 38193174 DOI: 10.5005/jp-journals-10024-3514
    AIM: The present systematic review aimed to report the studies concerning the primers in improving bond strength and identifying pertinent primers for a particular dental alloy by adhering to PRISMA precepts.

    MATERIALS AND METHODS: PubMed and Semantic Scholar databases were scoured for articles using 10 search terms. In vitro studies satisfying the inclusion criteria were probed which were meticulously screened and scrutinized for eligibility adhering to the 11 exclusion criteria. The quality assessment tool for in vitro studies (QUIN Tool) containing 12 criteria was employed to assess the risk of bias (RoB).

    RESULTS: A total of 48 studies assessing shear bond strength (SBS) and 15 studies evaluating tensile bond strength (TBS) were included in the qualitative synthesis. Concerning SBS, 33.4% moderate and 66.6% high RoB was observed. Concerning TBS, 26.8% moderate and 73.2% high RoB was discerned. Seventeen and two studies assessing SBS and TBS, respectively, were included in meta-analyses.

    CONCLUSIONS: Shear bond strength and TBS increased for the primed alloys. Cyclic disulfide primer is best-suited for noble alloys when compared with thiol/thione primers. Phosphoric acid- and phosphonic acid ester-based primers are opportune for base alloys.

    CLINICAL SIGNIFICANCE: The alloy-resin interface (ARI) would fail if an inappropriate primer was selected. Therefore, the selection of an appropriate alloy adhesive primer for an alloy plays a crucial role in prosthetic success. This systematic review would help in the identification and selection of a congruous primer for a selected alloy.

    Matched MeSH terms: Dental Cements*
  3. Meng Y, Ling TC, Mo KH, Tian W
    Sci Total Environ, 2019 Jun 25;671:827-837.
    PMID: 30947055 DOI: 10.1016/j.scitotenv.2019.03.411
    Carbonation for the curing of cement-based materials has been gaining increased attention in recent years, especially in light of emerging initiatives to reduce carbon dioxide (CO2) emissions. Carbonation method or CO2 curing is founded on the basis of the reaction between CO2 and cement products to form thermally stable and denser carbonate, which not only improves the physical and mechanical properties of cement-based materials, but also has the ability to utilize and store CO2 safely and permanently. This study aims to assess the effect of CO2 curing technology on the high-temperatures performance of cement blocks. Upon molding, dry-mix cement blocks were cured under statically accelerated carbonation condition (20% CO2 concentration with 70% relative humidity) for 28 days, followed by exposure to elevated temperatures of 300 °C to 800 °C in order to comprehensively study the principal phase changes and decompositions of cement hydrates. The results indicated that CO2 curing improved the performance of cement blocks, such as enhancement in the residual compressive strength and reducing the sorptivity. At 600 °C, the scanning electron microscopy (SEM) revealed a denser microstructure while thermal analisis and X-ray diffraction (XRD) analysis also clearly demonstrated that higher amounts of calcium carbonate were present in the cement blocks after CO2 curing, suggesting better high-temperature performance compared to natural cured cement blocks. In general, an improved high-temperature performance, specifically at 600 °C of the dry-mixed cement blocks was demonstrated by adopting the CO2 curing technology. This confirms the potential of utilizing CO2 curing technology in not only improving quality of cement blocks, new avenue for storing of CO2 in construction material can be realized at the same time.
    Matched MeSH terms: Dental Cements
  4. Sulong MZ, Aziz RA
    J Prosthet Dent, 1990 Mar;63(3):342-9.
    PMID: 2407832
    This is a review of the literature concerning wear related to the following materials used in dentistry: dental amalgam, composite resins, and glass-ionomer cements, as well as natural tooth substance. Discussions are included on both in vivo and in vitro studies in which various methods were used to help determine wear resistance.
    Matched MeSH terms: Dental Cements*
  5. Ong RM, Luddin N, Ahmed HM, Omar NS
    Singapore Dent J, 2012 Dec;33(1):19-23.
    PMID: 23739319 DOI: 10.1016/j.sdj.2012.11.001
    The aim of this study was to compare the cytotoxicity of accelerated-set white MTA (AWMTA) and accelerated-set Malaysian white PC (AMWPC) on stem cells from human exfoliated deciduous teeth (SHED). The test materials were introduced into paraffin wax moulds after mixing with calcium chloride dihydrate and sterile distilled water. Subsequently, the set cement specimens were sterilized, incubated in a prepared Dulbecco's modified Eagle medium (DMEM) for seven days. The biomarker CD166 was used for characterization of SHED using flow cytometry. The material extracts were diluted at five different concentrations and incubated for 72h with SHED. The cell viability was evaluated using Dimethylthiazol diphenyltetrazolium bromide (MTT) assay, and the data was analysed using Mann-Whitney test (P<0.05). The results showed that AWMTA revealed significantly greater cell viability at 25 and 12.5mg/ml concentrations (P<0.05). Concomitantly, AMWPC exhibited greater cell viability at concentrations <12.5mg/ml and the results were significant at 1.563mg/ml (P<0.05). Both materials demonstrated moderate cytotoxicity at 25mg/ml and slight cytotoxicity at 6.25 and 3.125mg/ml. At 1.563mg/ml, no cytotoxic activity was merely observed with AMWPC. In conclusion, AMWPC exhibited favourable and comparable cell viability to that of AWMTA, and has the potential to be used as an alternative and less costly material in dental applications.
    Matched MeSH terms: Dental Cements
  6. Muhd Norhasri Mohd Sidek, Mohd Fadzil Arshad, Megat Azmi Megat Johari, Zaid Mohd Yazid, Amir Khomeiny, R.
    MyJurnal
    Metakaolin is a manufactured pozzolan produced by thermal processing of purified kaolinitic clay using electrical furnace. This study has examined the effect of Metakaolin on the properties of cement and concrete at a replacement level of 0%, 5%, 10% and 15%. The parameters studied were divided into two groups which are chemical compositions, water requirement, setting time and soundness test were carried out for cementitous properties. Workability, compressive strength and bending strength were test for concrete properties. Hardened concrete was cured under different type of curing conditions and tested.. The result showed that the inclusions of Metakaolin as cement replacement minerals have change some of the cementitous and concrete properties. This research reveals, the optimum effect for cementitous and concrete properties for metakaolin was 10%.
    Matched MeSH terms: Dental Cements
  7. Zalina Laili, Muhamad Samudi Yasir, Mohd Abdul Wahab Yusof
    Sains Malaysiana, 2017;46:1617-1623.
    The influence of water-to-cement ratio (w/c) on the compressive strength of cement-biochar-spent resins matrix was
    investigated. Spent resins waste from nuclear reactor operation was solidified using cement with w/c ranging from 0.35
    to 0.90 by weight. In this study, biochar was used as a cement admixture. Some properties of spent resins and biochar
    were determined prior to the formulation study. Compressive strength of harden cement-biochar-spent resins matrix
    was determined at 28 days. The compressive strength of cement-biochar-spent resins matrix was found to depend on the
    w/c and the amount of spent resins added to the formulation. The immersion test of cement-biochar-spent resins matrix
    showed no significant effects of cracking and swelling. The compressive strength of the cement-biochar-spent resins
    matrix increased after two weeks in water immersion test.
    Matched MeSH terms: Dental Cements
  8. Mohammad Razaul Karim, Sumiani Yusoff, Hashim Abdul Razak, Faisal I. Chowdhury, Hossain Zabed
    Sains Malaysiana, 2018;47:523-530.
    Technical benefit of incorporation of Palm Oil Clinker (POC) in cement-based applications has been proven in recent
    studies. The aim of this work was to assess the heavy metal leaching behavior to ensure environmental safety of using
    POC in cement-based applications. The chemical composition, morphology, total organic carbon (TOC) and mineralogy
    were determined using XRF, FESEM, TOC analyzers and XRD to select appropriate chemical reagents for complete digestion.
    HNO3
    , HF and HClO4
    were used for digestion of POC to measure heavy metal content using ICP-MS. The chemical reagents
    CH3
    COOH, NH2
    OH-HCl, H2
    O2
    +CH3
    COONH4
    and HF+HNO3
    +HCl were used for extraction of acid soluble, reducible,
    oxidizable and residual fractions of heavy metals in POC, respectively. The leaching toxicity of the POC was investigated
    by the USEPA 1311 TCLP method. The result showed the presence of Be, V, Cr, Ni, Cu, Zn, As, Se, Ag, Cd, Ba and Pb with
    levels of 5.13, 11.02, 2.65, 1.93, 45.43, 11.84, 15.07, 0, 0, 81.97 and 1.76 mg/kg, respectively, in POC. The leaching value
    in mg/L of As (4.56), Cu(1.05), Be (0.89), Zn(0.51), Ba(0.26), Ni (0.17), V(0.15), Cr(0.001) and Se (0.001) is found well
    below the standard limit of risk. Risk assessment code (RAC) analysis confirms the safe incorporation of POC in cementbased
    applications.
    Matched MeSH terms: Dental Cements
  9. Tang X, Yang Y, Xie Y
    Sains Malaysiana, 2016;45:1543-1550.
    The main objective of this work was to investigate the influence of waterborne epoxy resin emulsion (WER) on the physical properties of oil well cement slurries. Cement slurries containing 5%, 10% and 15% of WER bwoc were compared with WER-free slurries. The rheological behavior was carried out according to API standard. Uniaxial compressive strength and shear bond strength of cement stone were evaluated at the ages of 24, 48 and 72 h. The experimental results illustrate that the addition of WER does not alter the rheological behavior. The addition of WER has increased the shear bond strength almost 52% at 24 h of aging for 10% WER bwoc when compared with unmodified slurry. The enhancement on shear bond strength was attributed to the mechanical anchoring and resin film forming at the interface
    Matched MeSH terms: Dental Cements
  10. Lui JL
    Quintessence Int, 1994 May;25(5):313-9.
    PMID: 7938415
    Composite resins have been advocated as a reinforcing build-up material for badly damaged endodontically treated teeth with flared canals. However, the control of an autocuring composite resin is difficult because it polymerizes rapidly within the root canal. While the light-curing composite resins are more user friendly, their polymerization can be a problem deep in the root canal. Light-transmitting plastic posts allow the transmission of light into the root canal and enable intraradicular composite resin reconstitution and reinforcement of weakened roots. At the same time, the light-transmitting plastic post forms an optimal post canal in the rehabilitated root and can accurately fit a matching retentive final post. These light-transmitting posts are a useful addition to the dental armamentarium.
    Matched MeSH terms: Dental Cements
  11. Khairul Nizam Tahar, Anuar Ahmad
    MyJurnal
    The objective of this study was to investigate the capabilities of low-cost digital cameras in volume determination. Low-cost digital cameras are capable of many applications including aerial photogrammetry and close-range photogrammetry. Low-cost digital cameras have the potential to be used in landslide monitoring and mapping. In this study, a low-cost digital camera was used as a tool to acquire digital images of a model of a simulated landslide. The model was constructed using cement and sand with the dimensions of 3m in length and 1m width. Digital images of the simulated model were acquired using the technique of aerial photogrammetry and were subsequently processed using digital photogrammetric software. A portion of the simulated model was excavated to simulate a landslide and volume determination was carried out for the excavated sand. The results showed that low-cost digital cameras can be used in photogrammetric application including volume determination.
    Matched MeSH terms: Dental Cements
  12. Dahlia Lema, A.M., Kartini, K., Dyg. Siti Quraisyah, A.A., Anthony, A.D., Nuraini, T., Siti Rahimah, R.
    MyJurnal
    Sludge is an unavoidable product of wastewater treatment that creates problems of disposal. Increasingly, strict environmental control regulations have resulted in limitations on sludge disposal options.Disposal by incineration has been found to be a good option. In this research, application of domestic waste sludge powder (DWSP) was used as cement replacement in concrete mix. This study utilised replacement of 3 %, 5 %, 7 %, 10 % and 15 % by weight of OPC with water binder (w/b) ratio of 0.60, 0.55 and 0.40 for Grade 30, Grade 40 and Grade 50 respectively. The performance of DWSP concrete in terms of its compressive strength, water absorption, water permeability and Rapid Chloride Ion penetration were investigated. All values of compressive strength for DWSP concrete were lower compared to the OPC control, and the strength decreased as the percentage of replacement with DWSP increased for Grade 30 and Grade 50, except for Grade 40 at replacement of 7 %. Meanwhile, water absorption and water permeability for the DWSP concrete increased as the replacement increased. Overall, with further research in producing quality DWSP, the potential of using this waste as a cement replacement material is very promising.
    Matched MeSH terms: Dental Cements
  13. Rahman, M. E., Leblouba, M., Pakrashi, V.
    MyJurnal
    The aim of this study is to investigate the effects of Palm Oil Clinker (POC) added as a stabilizer for improving the strength of peat. Cement and POC are added into peat up to 50% of the maximum dry unit weight. Treated peat achieved higher dry unit weight, almost 2.5 times as compared to untreated peat. Unconfined compressive strength (UCS) of treated peat is also investigated for soaked and unsoaked conditions. The results show that curing time improved the unconfined compressive strength of treated sample and increased by a factor of 20 and 11 for unsoaked and soaked conditions after 28 days of curing, respectively. The treated samples added with POC can be related to an increase in unconfined compressive strength for long time curing.
    Matched MeSH terms: Dental Cements
  14. Ainul Haezah Noruzman, Mohammad Ismail, Taliat Ola Yusuf, Parham Forouzani
    MyJurnal
    The volume of waste generated from surface coating industries is of global concern. The disposal of this waste in the form of effluent has put enormous pressure on land and also poses as a health hazard when it leaches into soil and underground water. The study aims to examine the utilization of vinyl acetate effluents from water based paint factories as an admixture in concrete. Concrete specimens containing 0%, 2.5%, 5% and 10% of vinyl acetate effluents by weight of cement were prepared. The specimens were tested for drying shrinkage for 28 days and porosity was tested using mercury intrusion porosimetry. Findings show that concrete containing various proportions of vinyl acetate effluents manifests higher shrinkage behaviour compared to the control item. An investigation of pore size distribution reveals that polymer effluents have particles size larger than 50 nm which are categorize as macroporous in accordance to IUPAC classification. It can be concluded that adding polymer vinyl acetate effluents affects concrete deformation due to the condition of its pore structures. The utilization of this material may provide beneficial effect in terms of the durability performance of concrete and minimize environmental pollution.
    Matched MeSH terms: Dental Cements
  15. Nor Umairah Abd Rahim, Mohd Fadzil bin Arshad
    MyJurnal
    Ordinary Portland Cement (OPC) is widely used by the construction industry. Research to find the precise proportion of cement replacement material which can be used to produce a product called Ternary Blended Cement (TBC) is not new. The objective of this study is to determine the effect of POFA and SF as TBC on the heat of hydration and compressive strength of mortar. Before producing TBC, specimens using BBC is required. Mix design proportion for POFA and SF are 5%, 10%, 15%, and 20%. Mix design proportion TBC are chose from the highest compressive strength value achieved at 7 days of curing. This research found the heat of hydration of TBC containing 20% POFA and 5% SF is high in the beginning to drop at the end of hydration process in addition to producing lower compressive strength.
    Matched MeSH terms: Dental Cements
  16. Rosnani Ahmad, Rohaidah Md Nor, Siti Azliya Ismail
    MyJurnal
    Sawdust is considered a waste material and a number of innovative ways are being taken to mitigate its effects on the environment. The use of sawdust as additional admixture in cement-sand brick production is an alternative option to mitigate the problem. In this study, three different types of cement-sand brick mixture in proportion of 1%, 2% and 3% of sawdust added to the normal mixture are prepared. Compression test was conducted on the brick mixture and results indicated 1% sawdust satisfy the Class 1 loadbearing brick whilst the 2% sawdust is slightly above the minimum required strength of 5.2 MN/ m2 for an ordinary quality brick set by the Standards MS 76:1972. Thus, the use of sawdust as admixture in cement-sand brick should not exceed 3%.
    Matched MeSH terms: Dental Cements
  17. Kaniraj, Shenbaga R., Fung, Y. C.
    MyJurnal
    Addition of chemical binders such as lime and cement improves the strength and stiffness
    of fine grained soils. However, the treated soils exhibit brittle stress-strain behaviour.
    Inclusion of randomly oriented discrete fibers in the soil-binder mixture changes its brittle
    behaviour into ductile behaviour. Most synthetic fibers, however, tend to get entangled
    and cannot be easily separated from one another. Therefore, it is difficult to realize soilbinder-
    fiber mixtures in which the fibers are distributed uniformly throughout the mass.
    This issue has been an impediment in the utilization of the positive modification in the
    behaviours of soils and soil-binder mixtures by the fibers. The present study aims to address
    the limitations in using fibers as soil reinforcement. Further, it also aims to investigate
    the use of synthetic mesh or net elements as an alternative type of soil reinforcement.
    The paper presents the experimental study on a fine grained soil. Lime has been chosen
    as the binder due to its low cost and the scarcity of fiber reinforced soil studies in which
    lime has been used as a binder. The main experimental program is a series of unconfined
    compression tests on samples prepared using untreated soil, soil-reinforcement mixture,
    soil-lime mixture, and soil-lime-reinforcement mixture. The lime treated samples were
    cured up to 120 days at laboratory temperature. The results demonstrate the combinational
    effects of lime and discrete reinforcement
    elements on the behaviour and mechanical
    properties of the soil. The performances of
    the fiber and mesh element reinforcements
    have also been compared.
    Matched MeSH terms: Dental Cements
  18. Chin ZW, Chong WS, Mani SA
    Oral Health Prev Dent, 2016;14(2):125-35.
    PMID: 26525124 DOI: 10.3290/j.ohpd.a34999
    PURPOSE: To assess the knowledge, attitude and utilisation regarding fissure sealants (FS) and preventive resin restorations (PRR) among Malaysian dentists.

    MATERIALS AND METHODS: A questionnaire consisting of 35 questions was distributed by mail or an online survey to 425 registered dentists selected according to place of work by stratified random sampling.

    RESULTS: One hundred fifty-three dentists responded to the survey. A positive attitude towards FS and PRR was noted among most Malaysian dentists. About half of the respondents used FS/PRR occasionally (48.4%), while few (13.7%) applied them routinely. The majority of the dentists agreed that minimally invasive dentistry is important and FS are effective in caries prevention, using them on high caries-risk individuals. Most of the dentists used pumice or paste to clean teeth before placing FS/PRR. A significant number of dentists used a bonding agent prior to placing FS. Although only 57.5% dentists were aware of guidelines for FS use, most dentists agreed that guidelines are important.

    CONCLUSION: Although there was a positive attitude towards FS/PRR, few dentists applied them routinely. Some of the steps undertaken for placement of FS and PRR were outdated. Updating local guidelines for dentists to ensure uniform practice of FS and PRR is justified.

    Matched MeSH terms: Dental Cements/chemistry
  19. Al-Makramani BMA, Razak AAA, Abu-Hassan MI, Al-Sanabani FA, Albakri FM
    Open Access Maced J Med Sci, 2018 Mar 15;6(3):548-553.
    PMID: 29610618 DOI: 10.3889/oamjms.2018.111
    BACKGROUND: The selection of the appropriate luting cement is a key factor for achieving a strong bond between prepared teeth and dental restorations.

    AIM: To evaluate the shear bond strength of Zinc phosphate cement Elite, glass ionomer cement Fuji I, resin-modified glass ionomer cement Fuji Plus and resin luting cement Panavia-F to Turkom-Cera all-ceramic material.

    MATERIALS AND METHODS: Turkom-Cera was used to form discs 10mm in diameter and 3 mm in thickness (n = 40). The ceramic discs were wet ground, air - particle abraded with 50 - μm aluminium oxide particles and randomly divided into four groups (n = 10). The luting cement was bonded to Turkom-Cera discs as per manufacturer instructions. The shear bond strengths were determined using the universal testing machine at a crosshead speed of 0.5 mm/min. The data were analysed using the tests One Way ANOVA, the nonparametric Kruskal - Wallis test and Mann - Whitney Post hoc test.

    RESULTS: The shear bond strength of the Elite, Fuji I, Fuji Plus and Panavia F groups were: 0.92 ± 0.42, 2.04 ± 0.78, 4.37 ± 1.18, and 16.42 ± 3.38 MPa, respectively. There was the statistically significant difference between the four luting cement tested (p < 0.05).

    CONCLUSION: the phosphate-containing resin cement Panavia-F exhibited shear bond strength value significantly higher than all materials tested.

    Matched MeSH terms: Dental Cements
  20. Lin GSS, Ghani NRNA, Noorani TY, Ismail NH, Mamat N
    Odontology, 2021 Jan;109(1):149-156.
    PMID: 32623538 DOI: 10.1007/s10266-020-00535-7
    To compare the dislodgement resistance and the adhesive pattern of four different endodontic sealers to root dentine walls. Ninety lower premolars were assigned to five groups (n = 18), Group 1: no sealer (control); Group 2: EndoRez (ERZ); Group 3: Sealapex (SPX); Group 4: EndoSeal MTA (ESA) and Group 5: BioRoot RCS (BRS). They were instrumented up to size 30 taper 0.06 and obturated using single cone technique with matched-taper gutta-percha cones and one of the mentioned sealers. Six teeth from each group were then randomly subjected to 100, 1000 and 10,000 thermocycles, respectively. 1 mm slice of mid root region, measuring 6 mm from the apical foramen was prepared and subjected to push-out test under a Universal Testing Machine. Adhesive patterns of sealers were assessed using a stereomicroscope at 20 × magnification and classified using a new system. Statistical analyses were performed using two-way ANOVA, complemented by Tukey HSD and Chi-square tests. ESA and BRS showed significantly higher (p  0.05) at 100, 1000 and 10,000 thermocycles, respectively. Both ESA and BRS exhibited a significant higher rate (p 
    Matched MeSH terms: Dental Cements
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