Cytotoxicity of acrylic resin-based materials used to fabricate interim crowns

2020 ◽  
Vol 124 (1) ◽  
pp. 122.e1-122.e9 ◽  
Author(s):  
Isabela R. Souza ◽  
Taisa N. Pansani ◽  
Fernanda G. Basso ◽  
Josimeri Hebling ◽  
Carlos A. de Souza Costa
Keyword(s):  
Acrylic Resin ◽  
Materials Used

scholarly journals Archaeological glass conservation and restoration intervention materials – a literature review

2021 ◽  
Author(s):  
Andreia Pereira ◽  
Márcia Vilarigues ◽  
Inês Coutinho
Keyword(s):  
Critical Analysis ◽  
Epoxy Resins ◽  
Acrylic Resin ◽  
Literature Survey ◽  
Acidic Solutions ◽  
Mechanical Methods ◽  
Materials Used ◽  
Cleaning Methods ◽  
Archaeological Objects ◽  
Common Intervention

Conservation and restoration on archaeological objects in glass often involve the removal of materials from previous restorations and comprise a deep knowledge about present and past methodologies. This article presents a literature survey and critical analysis of the main materials used in the different stages of intervention: cleaning, consolidation, joining fragments and filling gaps. A considerable number of used products was identified, which illustrates the use of various methodologies among professionals from this area. Cleaning methods vary from mechanical methods using a brush (less invasive) to the use of various acidic solutions, some of which can endanger the integrity of objects, being the most common ethylenediamine tetra-acetic acid. We highlight the use of epoxy resins as adhesive, consolidant and filler, as well as the acrylic resin Paraloid B-72, identified as reversible, colorless, stable and inert. This survey and analysis of the bibliography reveals the need to implement common intervention methodologies dedicated to this material.

scholarly journals The comparison of color stability between thermoplastic nylon resin and heat-cured acrylic resin after tea-soaking using spectrophotometer

2009 ◽  
Vol 21 (3) ◽  
Author(s):  
Lisa Putri Lestari ◽  
Kosterman Usri ◽  
Renny Febrida
Keyword(s):  
Base Material ◽  
Color Stability ◽  
Acrylic Resin ◽  
Colour Stability ◽  
Thermoplastic Resin ◽  
Denture Base ◽  
Material Requirement ◽  
System Data ◽  
Materials Used ◽  
Tea Drinking

Color stability is one of the denture base material requirement. Nowadays, nylon thermoplastic resin and heat-cured acrylic resin which is used as denture base materials can be changed in colour. One of a colour-changed factor is the tea drinking habit. The objective of this research was to compare the colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea. Materials used for the research were nylon thermoplastic resin from Valplast and heat-cured acrylic resin QC-20, with a sample size of 64x(10±0.03)x(2.5±0.03)mm. The sample would be assessed of colour stability after the denture base soaked in tea for 7 days. The colour measurement of each sample was done by spectrophotometer equipment (CIE lab system). Data gathered later on statistically processed with ANOVA testing. The result showed that the comparison ratio of colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea was 1.9886:1.1152. The conclusion was that colour stability in the nylon thermoplastic resin was lower than heat-cured acrylic resin after soaked in tea. This result was due to a polymer chain of nylon thermoplastic which was lower than heat-cured acrylic resin and its porosity which was higher, so tea easily soaked into the materials.

A technique to fabricate an interim implant-supported fixed complete denture for immediate loading

2020 ◽  
Author(s):  
Oguz Ozan ◽  
Tolga Pekperdahci ◽  
Doruk Kocyigit ◽  
Burak Yilmaz
Keyword(s):  
Soft Tissue ◽  
Soft Tissues ◽  
Acrylic Resin ◽  
Complete Denture ◽  
Immediate Loading ◽  
Tissue Surface ◽  
Materials Used

Converting an acrylic resin removable complete prosthesis into a fixed implant-supported prosthesis to immediately load the implants can be a challenging procedure. Using acrylic resin to secure titanium interim copings intraorally may be a difficult task, and any process to facilitate this procedure may be advantageous for the clinician and the patient. This report describes a technique for facilitating the fabrication of an interim immediately loaded implant-supported fixed complete prosthesis. This technique and the materials used enabled the efficient fabrication and delivery of the prosthesis with an appropriate soft tissue surface and acrylic resin thickness without irritating newly sutured soft tissues.

The Assessment of Acrylic Infantile Overdenture during the Treatment of Anodontia in Children: A Case Study

2017 ◽  
Vol 752 ◽  
pp. 41-45
Author(s):  
Anca Porumb ◽  
Adrian Almasi ◽  
Simona Cavalu ◽  
Cristian Ratiu
Keyword(s):  
Acrylic Resin ◽  
Negative Influence ◽  
Materials Used

Anodontia or dental agenesis in children is difficult to treat, as the child is smaller. The treatment of anodontia is a complex one, it is important to mention that the children’s body is upgrowing and, also, the psychological implications that could appear in children without teeth. The materials used in acrylic infantile overdenture must be non-toxic and shouldn’t have any negative influence in upgrowing children. The base of acrylic infantile overdenture is made of acrylic resin. The aim of the present study is to highlight the changing of regular acrylic infantile overdenture, at the age of 1 and a half, in order to allow the physiological growth of the children’s bones.

scholarly journals Different Materials Used as Denture Retainers and Their Colour Stability

2018 ◽  
Vol 6 (11) ◽  
pp. 2173-2179
Author(s):  
Sherif A. Sadek ◽  
Wessam M. Dehis ◽  
Hala Hassan
Keyword(s):  
Digital Camera ◽  
Acrylic Resin ◽  
Point Of View ◽  
Colour Stability ◽  
Cobalt Chromium ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Abutment Teeth ◽  
Materials Used ◽  
The Aesthetic

BACKGROUND: Retainers are of great importance for the longevity of the prosthetic removable partial denture during various functions especially the esthetic one. The key of successful clasp selection is to select a direct retainer that will control tipping and torquing forces on the abutment teeth, provide retention against reasonable dislodging forces and are compatible with both tooth and tissue contour together with the aesthetic desire of the patient. AIM: This study aims to compare different clasp material to enhance the choice of the clasp based on the aesthetic point of view. METHODS: The colour evaluation of the tested materials had been evaluated by computer aided technique with digital camera with 3 Mega Pixels of resolution. RESULTS: In the current research, the technique of colour evaluation was carried out to compare different clasp materials to enhance the choice of the clasp based on the aesthetic point of view. Most commonly, Removable Partial Denture (RPD) retainers are fabricated identically from the metal framework’s alloy as Cobalt Chromium (CoCr) alloy although it is unaesthetic. This esthetic problem has been overcome by other methods and by utilising different materials, these included covering the retainers with tooth-coloured acrylic resin, as well as the introduction of esthetic materials as; Thermoplastic Acetal, Versacryl, and Thermopress. CONCLUSION: It has been concluded that the non-metallic Acetal resin clasp shows superior physical properties regarding colour stability.

scholarly journals Survey of current materials and impression techniques for Complete Dentures among Nepalese Prosthodontists

2018 ◽  
Vol 14 (2) ◽  
pp. 75-80
Author(s):  
Amar Bhochhibhoya ◽  
Binod Acharya ◽  
Samskar Bickram Rana ◽  
Rinu Sharma ◽  
Jemish Acharya ◽  
...  
Keyword(s):  
Acrylic Resin ◽  
Complete Denture ◽  
Complete Dentures ◽  
Medical College ◽  
Institutional Review ◽  
Impression Materials ◽  
Ethical Approval ◽  
Irreversible Hydrocolloid ◽  
Removable Prosthesis ◽  
Materials Used

ABSTRACTBackground: Impression making is one of the critical factors in determining success or failure of complete denture therapy. The precise reproduction of edentulous foundation is essential for retention, stability, and support of the removable prosthesis. Evidence suggests that there is variability in materials and techniques regarding impressions making for complete dentures. There is little published information on studies conducted among Nepalese Prosthodontists. The purpose of this study was to evaluate current materials andmethods for impressions for complete denture prosthodontics in Nepal. Materials & Methods: A questionnaire based survey was conducted among Nepalese Prosthodontists. Ethical approval for the beginning of the study was obtained via Institutional Review Committee, Nepal Medical College. A self-administered anonymous questionnaire was distributed to the participants. Data were analyzed by using frequency distribution.Results: Majority of responses indicated use of irreversible hydrocolloid in stock metal tray for making the preliminary impression. The selective pressure was the predominantly used impression philosophy (78.3%). The most common material for the fabrication of custom trays was autopolymerizing acrylic resin (96.7%). All respondents border molded the custom tray prior to making the final impression. The final impression materials used were zinc oxide eugenol impression paste (73.3%), polyvinylsiloxane (11.7%), polyether (11.7%) and polysulphide (3.3%). Conclusion: Although there is variability in impression materials andtechniques used by Prosthodontists in Nepal for the fabrication of complete dentures, the results showed interesting trends. Most practitioners followed the traditional techniques of complete denture impression procedures.Keywords: complete denture; custom tray; edentulism; impression.

Stainability of acrylic resin materials used in CAD-CAM and conventional complete dentures

2020 ◽  
Vol 123 (6) ◽  
pp. 880-887 ◽  
Author(s):  
Faisal D. al-Qarni ◽  
Charles J. Goodacre ◽  
Mathew T. Kattadiyil ◽  
Nadim Z. Baba ◽  
Rade D. Paravina
Keyword(s):  
Acrylic Resin ◽  
Complete Dentures ◽  
Cad Cam ◽  
Materials Used

scholarly journals A method of comparing the wear resistance of various materials used for artificial teeth

2014 ◽  
Vol 62 (3) ◽  
pp. 229-234
Author(s):  
Claudia Maria Zarpelon SILVA ◽  
José Virgílio de Paula EDUARDO ◽  
Milton Edson MIRANDA ◽  
Roberta Tarkany BASTING ◽  
Karina Andrea Novaes OLIVIERI
Keyword(s):  
Acrylic Resin ◽  
Wear Testing ◽  
Central Incisor ◽  
Maxillary Central Incisor ◽  
A Value ◽  
Significant Difference ◽  
Materials Used ◽  
Artificial Teeth ◽  
Polished Metal ◽  
Rotary Device

OBJECTIVE: Abrasion resistance of three commercial brands of acrylic resin for artificial teeth, available on the domestic market (Biotone(r), Plus(r) and Vipi Dent Artiplus(r)) was evaluated by a new methodology called "Pirassununga Method ". METHODS: The Manufacturers produced the maxillary central incisor-shaped incisal resin specimens (n=27). These were embedded in chemically activated acrylic resin in an insulated metal matrix to fabricate test specimens, which were flattened on a lathe and refined manually with sandpaper. Wear testing was conducted in an experimental machine at the Vipi dental products factory. In the "Pirassununga Method" a polished metal sphere 4.8 mm in diameter, attached to a rotary device passes over the fixed specimens in programmable cycles, under 5N pressure, using distilled water as lubricant. In each sample, the groove caused by abrasion, was analyzed in two ways: Readout under a microscope to determine the breadth and depth of the groove caused by the ball, and by laser roughness meter readout, which obtained a value Rt. RESULTS: The nonparametric Kruskal Wallis test showed no statistically significant difference between the medians of brands evaluated in the cycles performed (p = 0.936). CONCLUSION: Artiplus(r) Brand showed a lower tendency to wear than commercial brands Biotone(r) and Plus(r) Vipi Dent, with the best performance shown for the IPN polymer.

scholarly journals In Vitro evaluation of microleakage of different materials used as pit-and-fissure sealants

2006 ◽  
Vol 17 (1) ◽  
pp. 49-52 ◽  
Author(s):  
Vanessa Pardi ◽  
Mário Alexandre Coelho Sinhoreti ◽  
Antonio Carlos Pereira ◽  
Gláucia Maria Bovi Ambrosano ◽  
Marcelo de Castro Meneghim
Keyword(s):  
Acrylic Resin ◽  
Blue Dye ◽  
Fissure Sealants ◽  
Pit And Fissure Sealants ◽  
Dye Penetration ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Materials Used ◽  
Pits And Fissures

The aim of this study was to evaluate in vitro the marginal microleakage of different materials used as pit-and-fissure sealants (Delton, Filtek Flow, Dyract Flow and Vitremer). Fifty-six extracted sound human third molars were randomly assigned to 4 groups (n=14). After sealant placement, the teeth were thermocycled (500 cycles; 5ºC, 37ºC and 55ºC), isolated, immersed in 2% buffered methylene blue dye for 4 h, included in acrylic resin and sectioned longitudinally in a buccolingual direction. The sections were analyzed for leakage using an stereomicroscope. A 4-criteria ranked scale was used to score dye penetration. All materials exhibited dye penetration to some extension and no statistically significant difference was observed among the groups (p>0.05). In conclusion, the findings of this study showed that a flowable composite resin, a flowable compomer and resin-modified glass ionomer placed on occlusal pits and fissures had similar marginal sealing as the unfilled self-cured resin-based sealant.

scholarly journals Comparison of Exothermic Release during the Polymerization of Four Materials used to fabricate Provisional Restorations

2014 ◽  
Vol 4 (1) ◽  
pp. 1-5
Author(s):  
Minu Raju
Keyword(s):  
Polymethyl Methacrylate ◽  
Temperature Increase ◽  
Acrylic Resin ◽  
Pulp Chamber ◽  
Thermal Probe ◽  
Complete Coverage ◽  
Ethyl Methacrylate ◽  
Materials Used ◽  
One Way Anova

ABSTRACT Background and objectives This in vitro study compared and determined the temperature increase in the pulp chamber of permanent maxillary first premolar teeth placed in contact with different resins used for the fabrication of provisional resto- rations. Materials and methods Polymethyl methacrylate (DPI), poly- ethyl methacrylate (SNAP), polyvinylethyl methacrylate (TRIM), bis-acrylic composite (Protemp II) were compared with respect to their exothermic properties during polymerization. Eighty freshly extracted maxillary first premolars were prepared for complete coverage restoration were placed in an acrylic resin block. A thermal probe connected to a digital thermometer was placed into the pulp chamber. Specimens were submerged in a water bath to simulate intraoral conditions. The provisional materials were manipulated according to manufacturer's instructions. The resin mix was placed into template and was then positioned on the prepared tooth. The temperature was recorded during the polymerization at 30-second intervals until it was evident that the peak temperature had been reached.   After complete polymerization, the template was removed from the tooth and the provisional crown was retrieved. Data was analyzed with one-way ANOVA and Bonferroni multiple comparisons test. Results Mean temperature increase for the provisional crown fabrication ranged from 38.78°C, 37.79°C, 37.71°C and 35.88°C for polymethyl methacrylate, polyethyl methacrylate, polyvinyl- ethyl methacrylate and bis-acrylic composite respectively.   Polymethyl methacrylate, polyethyl methacrylate and bisacrylic composite were highly significant. Interpretation and conclusion All the materials used were in the safer limit. Hence, by comparing all the four material, Bis-acrylic composite showed least temperature rise in pulp chamber. How to cite this article Raju M. Comparison of Exothermic Release during the Polymerization of Four Materials used to fabricate Provisional Restorations. Int J Prosthodont Restor Dent 2014;4(1):1-5.

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