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Brazilian Dental Journal 2023This study evaluated the effect of toothbrushing on enamel-cementing material-ceramic bonded interfaces, using different cementing materials.
UNLABELLED
This study evaluated the effect of toothbrushing on enamel-cementing material-ceramic bonded interfaces, using different cementing materials.
MATERIALS AND METHODS
Thirty enamel and thirty ceramic blocks were bonded with cementing materials to produce the samples that were bonded with three types of cementing materials: 1- RelyX Ultimate resin cement (REXU), 2- RelyX Unicem 2 self-adhesive resin cement (REU2) and 3- heated Z100 restorative composite (60°C). Bonded interfaces of the samples were toothbrushed and the surfaces of the 3 cementing materials were evaluated for roughness (RG, in µm), roughness profile (RP, in µm), and volume loss (VL, in µm3) (baseline and after 20,000 and 60,000 toothbrushing cycles). Data were evaluated by Generalized Linear Analysis (two factors: "material" and "toothbrushing cycle") and Bonferroni test (α=0.05).
RESULTS
REXU and Z100 exhibited lower RG than that presented by REU2, except after 60,000 toothbrushing cycles when only Z100 differed from REU2. The increase in toothbrushing cycles increased the RG and RP for all materials. REU2 also showed higher RP than those showed by REXU and Z100 when it was analyzed regarding the enamel. The VL of Z100 was the lowest with 20,000 toothbrushing cycles, regarding the enamel and ceramic. For 60,000 cycles, REXU showed the lowest VL regarding the ceramic, and REU2 had the highest VL regarding the enamel and ceramic.
CONCLUSION
In general, REXU and Z100 showed the best results regarding the evaluations performed and the REU2 exhibited the highest RG, RP, and VL.
Topics: Resin Cements; Toothbrushing; Dental Porcelain; Composite Resins; Dental Cements; Glass Ionomer Cements; Ceramics; Dental Enamel; Surface Properties; Materials Testing
PubMed: 38133474
DOI: 10.1590/0103-6440202305459 -
International Endodontic Journal Jun 2018To evaluate the effects of 2.8% or 10% calcium chloride (CaCl ) in calcium aluminate cement (CAC) with either bismuth oxide (Bi O ) or zinc oxide (ZnO) as radiopacifiers...
AIM
To evaluate the effects of 2.8% or 10% calcium chloride (CaCl ) in calcium aluminate cement (CAC) with either bismuth oxide (Bi O ) or zinc oxide (ZnO) as radiopacifiers on the progression of osteogenic cell cultures.
METHODOLOGY
Rat calvaria-derived cells were grown on Thermanox coverslips for 24 h and exposed to samples of (i) CACb: with 2.8% CaCl and 25% Bi O ; (ii) CACb+: with 10% CaCl and 25% Bi O ; (iii) CACz: with 2.8% CaCl and 25% ZnO; or (iv) CACz+: with 10% CaCl and 25% ZnO, placed on inserts. Nonexposed cultures served as the control. Calcium and phosphorus contents in culture media were quantified. The effects of the cements on cell apoptosis, cell viability and acquisition of the osteogenic cell phenotype were evaluated. Data were compared by Kruskal-Wallis test (α = 5%).
RESULTS
CACb+ promoted the highest levels of calcium in the culture media; CACz+, the lowest levels of phosphorus (P < 0.05). CACz+ and CACb increased cell apoptosis (P < 0.05). CACb reduced cell viability (P < 0.05) and the expression of the osteoblastic phenotype. CACz+ and CACb+ promoted greater cell differentiation and matrix mineralization compared to CACz and CACb (P < 0.05).
CONCLUSION
For CAC with the lower CaCl content, the use of Bi O was detrimental for osteoblastic cell survival and differentiation compared to ZnO, while CAC with the higher CaCl content supported the acquisition of the osteogenic cell phenotype in vitro regardless of the radiopacifier used. Thus, CAC with 10% CaCl would potentially promote bone repair in the context of endodontic therapies.
Topics: Aluminum Compounds; Animals; Apoptosis; Bismuth; Calcium Chloride; Calcium Compounds; Cell Survival; Cells, Cultured; Dental Cements; Osteogenesis; Phenotype; Rats; Rats, Wistar; Skull; Zinc Oxide
PubMed: 29226342
DOI: 10.1111/iej.12883 -
The Journal of Oral Implantology Aug 2019This study aimed to investigate the effects of the luting methods on the amount of cement remnants in implant restorations and to determine the restoration surface with...
This study aimed to investigate the effects of the luting methods on the amount of cement remnants in implant restorations and to determine the restoration surface with the maximum amount of residual cement. Forty abutments and crowns were divided into 4 groups as follows: TB group, luting with zinc oxide-eugenol cement; TBV group, luting with zinc oxide-eugenol cement after application of a separating agent over the transmucosal area of the abutment; PI group, luting with methacrylate cement; and PIV group, luting with methacrylate cement after application of a separating agent. After cementation, all the quadrants of the specimens were photographed, and the amount and location of the cement remnants were statistically analyzed ( ≤ .05). The amount of cement remnants was significantly smaller in the groups with a separating agent. The type of luting material did not significantly affect the results. Cement remnants were more abundant on the mesial and distal sides than on the buccal and lingual sides of the restoration.
Topics: Cementation; Crowns; Dental Abutments; Dental Cements; Dental Prosthesis, Implant-Supported
PubMed: 31008680
DOI: 10.1563/aaid-joi-D-18-00283 -
Journal of Indian Prosthodontic Society Apr 2024In routine dental care, various dental luting cements are utilized to cement the dental prosthesis. Thus, the aim of the current study was to assess the Cytotoxic effect...
AIM
In routine dental care, various dental luting cements are utilized to cement the dental prosthesis. Thus, the aim of the current study was to assess the Cytotoxic effect of three different dental luting cements on human gingival mesenchymal stem cell and evaluation of cytokines and growth factors release.
SETTINGS AND DESIGN
Cytotoxicity of glass ionomer cement (GIC), resin modified glass ionomer cement (RMGIC) and resin cement (RC) on the human gingival mesenchymal stem cells (HGMSCs) was evaluated. Amongst the cements tested, least cytotoxic cement was further tested for the release of cytokines and growth factors.
MATERIALS AND METHODS
MTT test was used to evaluate the cytotoxicity of the dental luting cements at 1 h, 24 h, and 48 h on HGMSCs. Cytokines such as interleukin (IL) 1α & IL 8 and growth factors such as platelet derived growth factor & transforming growth factor beta release from the least cytotoxic RC was evaluated using flow cytometry analysis.
STATISTICAL ANALYSIS USED
The mean absorbance values by MTT assay and cell viability at various time intervals between four groups were compared using a one way analysis of variance test and Tukey's post hoc test. The least cytotoxic RC group and the control group's mean levels of cytokines and growth factors were compared using the Mann-Whitney test.
RESULT
As exposure time increased, the dental luting cement examined in this study were cytotoxic. RC was the least cytotoxic, RMGIC was moderate and glass ionomer cement showed the highest cytotoxic effect. Concomitantly, a significant positive biological response of gingival mesenchymal stem cells with the release of ILs when exposed to the RC was observed.
CONCLUSION
For a fixed dental prosthesis to be clinically successful over the long term, it is imperative that the biocompatibility of the luting cement be taken into account in order to maintain a healthy periodontium surrounding the restoration.
Topics: Humans; Gingiva; Mesenchymal Stem Cells; Cytokines; Intercellular Signaling Peptides and Proteins; Dental Cements; In Vitro Techniques; Glass Ionomer Cements; Cell Survival; Cells, Cultured
PubMed: 38650340
DOI: 10.4103/jips.jips_260_23 -
The Journal of Prosthetic Dentistry Jul 2023Different techniques for retrieving cement-retained implant-supported prostheses have been described to minimize damage to the prostheses. Nevertheless, a classification... (Review)
Review
STATEMENT OF PROBLEM
Different techniques for retrieving cement-retained implant-supported prostheses have been described to minimize damage to the prostheses. Nevertheless, a classification of the described techniques remains ambiguous.
PURPOSE
The purpose of this systematic review was to review and classify the described techniques for recording and locating the screw access hole in cement-retained implant-supported prostheses.
MATERIAL AND METHODS
A bibliographic search was completed on MEDLINE/PubMed, Web of Science, Scopus, and Cochrane databases. A manual search was also conducted. The articles that described or evaluated techniques for recording and locating the screw access hole of cement-retained implant-supported prostheses were included. Two investigators independently assessed the quality assessment of the studies using the Revised Cochrane risk of bias tool for randomized trials. A third examiner was consulted to resolve the lack of consensus.
RESULTS
A total of 30 articles were included. The different methods were classified according to whether the screw access hole location was registered before or after cementation. The precementation techniques were classified into 4 subgroups: identification marks, photographic records, digital files, and precementation screw access hole location guides. The postcementation techniques were subdivided into 2 subgroups: radiographic records and postcementation screw access hole location guides.
CONCLUSIONS
Different techniques have been proposed to facilitate the location of the screw access hole in cement-retained implant-supported restorations. Although the evidence is scarce, studies seem to ascertain that some techniques, such as the use of drilling guides, orientation with cone beam computed tomography images, or holes made in the metal framework, can increase the retrievability of cement-retained implant-supported prostheses and decrease complications in the location of the screw access hole. The proposed classification summarizes precementation and postcementation techniques and provides a tool to decide the most suitable for each specific clinical situation.
Topics: Dental Implants; Dental Prosthesis, Implant-Supported; Dental Prosthesis Retention; Dental Cements; Cementation; Glass Ionomer Cements; Bone Screws
PubMed: 34809995
DOI: 10.1016/j.prosdent.2021.09.030 -
Clinical Oral Implants Research May 2021To evaluate the amount of residual cement after cementation of implant crown abutments with rubber dam and retraction cord with copy abutments techniques. (Randomized Controlled Trial)
Randomized Controlled Trial
OBJECTIVE
To evaluate the amount of residual cement after cementation of implant crown abutments with rubber dam and retraction cord with copy abutments techniques.
MATERIAL AND METHODS
Thirty single posterior metal-ceramic implant-supported restorations were delivered to 20 patients. The crowns were fabricated with occlusal openings obturated with composite, and then luted with resin-reinforced glass-ionomer cement on customised standard abutments. The cementation procedure was performed twice in the same specimens using rubber dam (group 1) and retraction cord with copy abutment (group 2). If no cement remnants were seen on periapical radiographs after cleaning, the crown-abutment unit was dismounted. All quadrants of the specimens were photographed to calculate the percentage proportions of residual cement area. Mann-Whitney and Kruskal-Wallis tests were used for statistical analysis.
RESULTS
In each group, 120 measurements were performed (30 implants, 4 surfaces each). The median percentage ratio with interquartile range (IQR) between the cement remnant area and total specimen area was 1.39% (IQR 0.77%-2.29%) and 0.58% (IQR 0.31%-1.33%) in groups 1 and 2, respectively. Lesser cement remnants were found in group 2 with a statistically significant difference (p < .001). The comparison of the mesial, distal, buccal, and lingual surfaces in each group showed no statistically significant differences between them (group 1, p = .482; group 2, p = .330).
CONCLUSIONS
The retraction cord and copy abutment reduced the excess cement more efficiently than the rubber dam did. Notwithstanding, undetected cement remnants were observed with both methods, and neither should be considered reliable in clinical applications.
Topics: Cementation; Crowns; Dental Abutments; Dental Cements; Dental Implants; Dental Prosthesis, Implant-Supported; Glass Ionomer Cements; Humans; Rubber Dams
PubMed: 33595848
DOI: 10.1111/clr.13724 -
Operative Dentistry Jul 2022This study investigated the fatigue failure load of simplified monolithic yttria partially stabilized zirconia polycrystal restorations cemented to a dentin-like...
This study investigated the fatigue failure load of simplified monolithic yttria partially stabilized zirconia polycrystal restorations cemented to a dentin-like substrate using different luting systems. Disc-shaped ceramic (Zenostar T, 10 mm Ø × 0.7 mm thick) and dentin-like substrate (10 mm Ø × 2.8 mm thick) were produced and randomly allocated into eight groups, without or with thermocycling (TC=5-55°C/12,000×): "cement" (RelyX Luting 2 - glass ionomer cement [Ion], [Ion/TC]; RelyX U200 - self-adhesive resin cement [Self], [Self/TC]; Single Bond Universal+RelyX Ultimate - MDP-containing adhesive + resin cement [MDPAD + RC], [MDP-AD + RC/TC]; ED Primer II+Panavia F 2.0 - Primer + MDP-containing resin cement [PR + MDP-RC], [PR + MDP-RC/TC])). Each luting system was used as recommended by the manufacturer. Staircase methodology (20 Hz; 250,000 cycles) was applied for obtaining the fatigue failure loads. Fractographic characteristics were also assessed. At baseline, the Ion group presented the lowest fatigue load, although it was statistically similar to the Self group. The resin-based cement systems presented the highest fatigue performance, with the Ion group being only statistically equal to the Self group. Thermocycling influenced the groups differently. After aging, the MDP-AD + RC presented the highest mean, followed by the PR + MDP-RC and Self groups, while the Ion group had the lowest mean. Fractographic analysis depicted all failures as radial cracks starting at the zirconia intaglio surface. The luting system with MDP-containing adhesive applied prior to the resin cement presented the highest fatigue failure load after aging, presenting the best predictability of stable performance. Despite this, monolithic zirconia presents high load-bearing capability regardless of the luting agent.
Topics: Ceramics; Dental Bonding; Dental Cements; Dental Materials; Dental Stress Analysis; Glass Ionomer Cements; Materials Testing; Resin Cements; Surface Properties; Zirconium
PubMed: 35917240
DOI: 10.2341/20-143-L -
Journal of Orofacial Orthopedics =... Jul 2015We evaluated the water absorption, solubility, and compressive strength of different cements and resin-modified glass ionomer cements (RMGICs), namely Adhesor®,... (Comparative Study)
Comparative Study
INTRODUCTION
We evaluated the water absorption, solubility, and compressive strength of different cements and resin-modified glass ionomer cements (RMGICs), namely Adhesor®, Ketac(™) Cem, Ortho Band Paste LC(™), Glass Ionomer Band Cement, and Transbond(™) Plus. Our aims were to compare the mechanical and physical properties of the cements widely used in orthodontics and to define the most suitable cements in an oral environment in terms of those characteristics.
MATERIALS AND METHODS
To assess compressive strength, the cements were subjected to compression tests done on a universal testing machine. To test water absorption and solubility, the weight changes in cement specimens were determined after immersion in distilled water for 1, 7, and 30 days.
RESULTS
Adhesor® and Ketac(™) Cem presented significantly higher solubility values than other cements after water immersion for 1, 7, and 30 days (p < 0.001).
CONCLUSION
Our results revealed that the traditional orthodontic cements have higher water solubility and water absorption values as well as lower compressive strength values than the RMGICs used in this study. Furthermore, Transbond(™) Plus revealed the highest compressive strength, whereas Adhesor® showed the lowest.
Topics: Absorption, Physicochemical; Compressive Strength; Dental Cements; Hardness; Humans; Materials Testing; Saliva
PubMed: 26149970
DOI: 10.1007/s00056-015-0284-6 -
British Dental Journal Mar 2024
Topics: Dental Cements; Bone Cements; Glass Ionomer Cements
PubMed: 38519688
DOI: 10.1038/s41415-024-7264-4 -
Australian Dental Journal Mar 2016With advances in the understanding of healing processes of the periodontium, pulp and alveolar bone following various injuries, the role of splinting has become... (Review)
Review
With advances in the understanding of healing processes of the periodontium, pulp and alveolar bone following various injuries, the role of splinting has become relatively well defined. This is generally reflected in the guidelines for trauma management published by the International Association of Dental Traumatology. While the widespread use of composite resin as an adhesive in various functional/flexible splinting systems has over many years allowed ease of application, removal of the material is not only time consuming but more seriously accompanied by minor or major iatrogenic damage to enamel. Dental materials science has continued to provide new materials and amongst them the development of resin activated glass-ionomer cement suitable for orthodontic bracket cementation has allowed the development of an alternative simplified splinting regimen for traumatized teeth which offers ease of application and removal with minimal or no iatrogenic damage to enamel.
Topics: Composite Resins; Dental Cements; Dental Enamel; Equipment Design; Glass Ionomer Cements; Humans; Iatrogenic Disease; Resin Cements; Splints; Tooth Injuries
PubMed: 26923448
DOI: 10.1111/adj.12398