Adaptation of acrylic resin dentures as influenced by the activation mode of polymerization

Takamata, Tetsuya; Setcos, J.C.; Phillips, Ralph W.; Boone, Malcolm E.

doi:10.14219/jada.archive.1989.0199

Cited by 82 publications

(70 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Measurements were made before and after 6 months of storage in distilled water, at three different points: the crests of the right (A) and left (B) ridges, and the median region of the palate (M). The results of this investigation are in agreement with those of previous studies (3,5,(8)(9)(10)(11)(12)(13)(14)(15)(16). The greatest dimensional change (0.3109 mm) between the resin base and the plaster cast occurred in the median region of the palate (M).…”

Section: Discussionsupporting

confidence: 91%

“…According to Anusavice (12), several variables are involved in the final result of the finished denture. Takamata et al (13) reported that the different thermal expansion coefficients of resin and plaster during flask cooling may increase resin shrinkage, due to the internal stresses developed. The release of stresses induced after separating the base-model causes distortions in the resin and increases the inaccuracy of the denture base to support tissues (14).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of storage period and effect of different brands of acrylic resin on the dimensional accuracy of the maxillary denture base

et al. 2008

View full text Add to dashboard Cite

The aim of this study was to evaluate the dimensional changes of denture bases made from different resins after different storage periods. For this purpose, 25 sets of plaster models/resin bases were prepared using 4 acrylic resins submitted to two types of polymerization: 1-QC-20 submitted to polymerization by microwave energy; 2-QC-20 submitted to polymerization by water hot bath; 3-Vipi Cril submitted to polymerization by water hot bath; 4-Vipi Wave submitted to polymerization by microwave energy; and 5-Onda Cryl submitted to polymerization by microwave energy. After polymerization, the specimens were sectioned for accuracy readings using a comparison microscope. Readings were taken at 3 points: the crests of the right (A) and left (B) ridges, and the median region of the palate, in 4 different periods. The data obtained were submitted to two-way ANOVA and Tukey's test at 5% significance level. The greatest distortions were found in the posterior palatal region of the base (M), with statistically significant difference (p<0.05) for the studied resins. All acrylic resins presented dimensional changes and the storage period influenced these alterations.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Influence of storage period and effect of different brands of acrylic resin on the dimensional accuracy of the maxillary denture base

et al. 2008

View full text Add to dashboard Cite

show abstract

“…(21) PMMA denture base resins and their curing processes have been modified not only to improve the physical and mechanical properties but also to improve the working properties. (22,23) The autoclave processing technique is represents a better substitute for zwater bath technique. Regarding autoclave processing technique, the slow (long) curing cycle provides better denture bases material including the tested physical and mechanical properties as compared with the fast (short) curing cycle.…”

Section: Introductionmentioning

confidence: 99%

Strength and Surface Roughness of Cross Linking Acrylic Resin Processed by Different Heat Curing Methods

Kareem

2015

Iraqi dent. j.

View full text Add to dashboard Cite

Background: Heat-cured acrylic resin is considered one of the most commonly used denture base material in denture construction, but this material is not ideal in every respect. So many researches have been carried out to find an alternative material like cross linking acrylic resin. Meanwhile, the curing procedures have been modified to improve the physical and mechanical properties of resin materials .The aim of this study was to evaluate the effect of three curing methods:(water bath, autoclave short cycle and autoclave long cycle) on transverse strength, tensile strength and surface roughness of cross linking acrylic denture base materials. Material and method: Cross linking acrylic resin was used in this study and processed in three curing methods (water bath, autoclave short cycle and autoclave long cycle). Ninety specimens were prepared. Each main group was subdivided into three subgroups according to the type of test used (transvers strength test, tensile strength test and surface roughness test). Each group contained 10 specimens for each test. Result:Three tests were used to analyze the results: analysis of variance (ANOVA), the least significant difference (LSD) and an independent T-test. There were no significant differences between the results of the processing techniques regarding transverse and tensile strength but there was a significant difference between the results of surface roughness tests. Conclusion: It was concluded that autoclave curing method can be used with different duration whether it is short or long instead of water bath curing method.

show abstract

“…Considering dimensional alteration of denture or bases resin, when conventional water bath and microwave energy were compared, some authors (Reitz et al, 1985;Levin et al, 1989;Uchida et al, 1989;Takamata et al, 1989;Al-Hanbali et al, 1991;Nelson et al, 1991;Wallace et al, 1991;Sanders et al, 1991;Barbosa et al, 2002;Keenan et al, 2003) found no difference between the two techniques; also, these results are not in agreement with others (Sanders et al, 1991;Nelson et al, 1991). Sanders et al (1991) observed in their study that microwave polymerization provided a lower degree of artificial tooth movement, while Nelson et al (1991) reported a greater degree of tooth positional changes when microwave polymerization was employed.…”

Section: Base Adaptation Dimensional Alteration Artificial Tooth Momentioning

confidence: 99%

The Use of Microwave Energy in Dental Prosthesis

Rizzatti-Barbosa¹,

Cury²,

Garcia³

2011

Advances in Induction and Microwave Heating of Mineral and Organic Materials

View full text Add to dashboard Cite

Adaptation of acrylic resin dentures as influenced by the activation mode of polymerization

Cited by 82 publications

References 14 publications

Influence of storage period and effect of different brands of acrylic resin on the dimensional accuracy of the maxillary denture base

Influence of storage period and effect of different brands of acrylic resin on the dimensional accuracy of the maxillary denture base

Strength and Surface Roughness of Cross Linking Acrylic Resin Processed by Different Heat Curing Methods

The Use of Microwave Energy in Dental Prosthesis

Contact Info

Product

Resources

About