Effect of Different Polishing Agents on Surface Finish and Hardness of Denture Base Acrylic Resins: A Comparative Study

Srividya, S; Nair, Chandrasekharan K; Shetty, Jayakar M

doi:10.5005/jp-journals-10019-1002

Cited by 13 publications

(14 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In general, self-curing acrylic specimens showed higher SR values compared to thermosetting acrylic material as in the present study [22]. Therefore, the differences between acrylics could be due to the preparation method of each polymer, mostly.…”

Section: Discussionmentioning

confidence: 61%

Surface roughness and hardness evaluation of some base metal alloys and denture base acrylics used for oral rehabilitation

et al. 2015

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 61%

Surface roughness and hardness evaluation of some base metal alloys and denture base acrylics used for oral rehabilitation

et al. 2015

View full text Add to dashboard Cite

“…Generally, the objective of the polishing procedure of dental materials is to produce an adequately smooth and glossy surface and thereby prevent bacterial plaque formation by gradual removal of rough layers from the surface incrementally (13,35).…”

Section: Discussionmentioning

confidence: 99%

“…The pumice paste was made by mixing pumice powder with running water, placed on specimen and polished with the help of rag wheel (32). Pumice mixed with water is the most commonly used polishing medium (35). The combination of Tripoli compound with wet rag wheel; after using a pumice solution in polishing caused specimens to be shiny and also little heat generated during polishing sealed the surface to resist discoloration and staining.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Two Polishing Techniques on Surface Roughness of Three Different Denture Base Materials (An in Vitro Study)

El-Din

Badr

Agamy

et al. 2018

Alexandria Dental Journal

View full text Add to dashboard Cite

INTRODUCTION:A direct link was found between surface roughness, the accumulation of plaque and the adherence of microorganisms concerning acrylic resins. However, the surface properties of the new thermoplastic materials remain questionable especially after using the conventional finishing and polishing techniques. Studying surface properties of each material makes the recommendation of the proper techniques easier. OBJECTIVES: This in vitro study intended to compare three types of denture base materials in regarding to the effect of different polishing techniques on their surface roughness. MATERIALS AND METHODS: 36 specimens were incorporated in this study. 12 specimens were in each group. 3 groups were formed: Group A: Heat cured Polymethylmethacrylate (PMMA). Group B: Thermoplastic Polyamides. Group C: Thermoplastic Acetal. Dimensions of specimens were (20×20×3 mm) with projection at the side. Statistical analysis was carried out using two way analysis of variance (ANOVA). Statistical significance was defined at P≤0.05. RESULTS: Technique no. 1 showed a high significant value in compared to technique no.2 for polishing the tested materials. CONCLUSIONS: PMMA was the highest affected group followed by thermoplastic acetal and the last affected group was thermoplastic polyamide. Prepolishing rubberizing with rubber bur improves the polishing procedure. RESULTS: Remarkable improvement in the histology and the ultrastructure of the alveolar bone of rats in Group III was observed. Moreover, hematological values revealed significant decrease in the inflammatory condition of rats with induced RA after fish oil treatment. CONCLUSIONS: Rheumatoid arthritis is an important risk factor for alveolar bone loss. The treatment of the RA induced rats with fish oil not only prevented the alveolar bone resorption and stimulated new bone formation, but also reduced relatively the level of rheumatoid factor in the blood.

show abstract

“…Then fine grit pumice was used. High shine buff was used with polishing brown Tripoli (12,13) . The specimens were conditioned in distilled water for two days at 37°C (14) .…”

Section: Finishing and Polishingmentioning

confidence: 99%

Evaluation the Effect of Fibers Addition on Mechanical Properties of Flexible Acrylic Resin

Abdul-Majeed¹,

Hummudi²

2019

IDJ

View full text Add to dashboard Cite

Background: In chemistry the development of polymer has produced another material to poly methyl methacrylate such as epoxy resins, polyamides (nylon), acetyl resins -----etc. All these resins are suited for thermoplastic processing. Polyamide materials are more flexible than the commonly used polymethylmethacrylate. The flexibility of polyamide allows partial dentures to be pressed in one piece including clasps. Glass fibers are the most widely used reinforcing materials forming about 90 % of the reinforcement in resins. The addition of fibers to provisional restorative resin increases tensile strength, fracture toughness and surface hardness. Objective of the study: An evaluation of the surface roughness, modulus of elasticity and tensile strength improvement of flexible denture bases after adding of glass fibers and altering in powder – monomer ratio. Material and Methods: Eighty samples of flexible acrylic were made and divided into two main groups according to the type of test to be used. Forty samples for surface roughness and forty samples for tensile strength and (modulus of elasticity). Each group is divided into four subgroups according to fibers addition and to the alteration in powder-liquid ratio as follows: group (A) consists of (10 specimens) without the addition of glass fibers and with (3:1) powder- monomer ratio. Group (B) consists of (10 specimens) with addition of glass fibers and with (3:1) powder- monomer ratio, group (C) consists of (10 specimens) without addition of glass fibers and with (2.5:1) powder- monomer ratio and group (D) consists of (10 specimens) with glass fibers and with (2.5:1) powder- monomer ratio. The tensile strength and modulus of elasticity were determined by Instron testing machine at cross speed of 0.5mm/min. The T.R 200 device was used to indicate the values of surface roughness specimens before and after finishing and polishing. Results: In the present study, ANOVA test showed a significant difference at (P<0.05) between all the groups of tensile strength test.Least significant difference( LSD) test showed a non-significant difference at (P>0.05) between most of the tested groups except the groups of 3:1 powder–monomer ratio with and without fibers addition and groups of 3:1 ratio without fibers addition in comparison with the groups of 2.5:1 ratio with fibers addition which showed highly significant . The modulus of elasticity revealed a non-significant difference between all the tested groups at (P>0.05). While there were highly significant difference at (p<0.01) between groups of surface roughness test before and after polishing, except the group of 2.5:1 ratio with and without fibers addition which showed a non-significant difference at (P>0.05.). Conclusion: Conclusion was derived that fibers addition significantly affects tensile strength. The modulus of elasticity was not significantly affected by fibers addition or by powder-monomer ratio. Regarding surface roughness, it was improved after fibers addition and alteration in powder-liquid ratio.

show abstract

Effect of Different Polishing Agents on Surface Finish and Hardness of Denture Base Acrylic Resins: A Comparative Study

Cited by 13 publications

References 9 publications

Surface roughness and hardness evaluation of some base metal alloys and denture base acrylics used for oral rehabilitation

Surface roughness and hardness evaluation of some base metal alloys and denture base acrylics used for oral rehabilitation

Effect of Two Polishing Techniques on Surface Roughness of Three Different Denture Base Materials (An in Vitro Study)

Evaluation the Effect of Fibers Addition on Mechanical Properties of Flexible Acrylic Resin

Contact Info

Product

Resources

About