Adaptation of complete denture bases submitted to chemical polishing

Gomes, Márcia Elisa Boscato; Broilo, Josué Ricardo; Walber, Luiz Fernando; Maccari, Paulo César Armani; Shinkai, Rosemary Sadami Arai

doi:10.1590/s1678-77572004000400013

Cited by 4 publications

(6 citation statements)

References 7 publications

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“…Further studies with longer evaluation of internal adaptation of denture bases fabricated with different time and degree and assessment of the impact of adaptation values on clinical outcomes are warranted. 10 There is a continuing effort to improve the properties of denture base materials. Curing processes have been modified to improve the physical and mechanical properties of those materials.…”

Section: Discussionmentioning

confidence: 99%

“…According to the manufacturer, the polymethyl methacrylate used has cross-linked chaines, which may provide greater dimensional stability. 10 Acrylic resins should be properly crosslinked and contain a limited amount of residual monomer. This monomer methyl methacrylate has a boiling point of 100.8 °C at atmospheric pressure.…”

Section: Discussionmentioning

confidence: 99%

“…[7][8][9][10] Several factors may affect final adaptation of dentures, like the type of the acrylic resin, flask cooling procedure, resorption of the alveolar ridge, water uptake, flexural strength and differences in polymerization techniques. [10][11][12][13][14] However, dimensonal changes are unavoidably active in every acrylic denture, and at least two types are well known: processing shrinkage and expansion upon immersion in water. 8,9 Cooling procedure of the flask and polymerization method may affect the processing shrinkage.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Autoclave and Heat Polymerization Techniques of Internal Adaptation of Acrylic Resins

Deste¹,

Durkan²,

Oyar³

et al. 2021

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi

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Aim: Polymerization shrinkage of the resin and distortion of the denture base due to thermal stress is virtually unavoidable during the processing of dentuRes These adverse effects increase the gap between the denture base and underlying mucosa, resulting in an illfitting denture. A variety of methods have been used to evaluate the dimensional changes and/or adaptation accuracy of a denture base. This study compared the adaptation accuracy of maxillary complete denture bases processed using different polymerization techniques; conventional compression-molding technique and autoclave polymerization techniques. Material and Methods: 42 resin specimens were fabricated from three heat polymerizing denture base acrylics (Meliodent, Paladent, QC-20). The specimens were divided into six groups (n=7). Three of them were polymerized in a conventional water bath and other three were polymerized in autoclave. Internal adaptation was evaluated immediately after finishing by weighting a silicone film between the resin base and the metallic master model (silicone copy technique). Statistical analyses were performed with the SPSS Windows for 15.0. Data were submitted to ANOVA and Tukey's post hoc tests at a significance level of 0.05. Results: Comparisons are made among groups submitted to the different polymerization procedure. Interaction of material and polymerization procedure had a statistically significant effect on the final adaptation of the denture bases. When comparing the internal adaptation within each group, all groups of autoclave polymerization had significant decrease of weight of impression materials of mean values (meliodent water bath 2.03±0.17, meliodent autoclave 1.29±0.92; paladent water bath 2.14±0.18, paladent autoclave 1.31±0.94; QC-20 water bath 2.20±0.17, QC-20 autoclave 1.45±0.12). Better internal adaptations were observed when the samples were autoclave polymerized comparing to the conventional heat-polymerized group (p<0.05) Conclusion: Increasing the internal adaptation of resin bases may be achieved by using autoclave polymerization technique, this would markedly contribute to the longevity of denture bases.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Autoclave and Heat Polymerization Techniques of Internal Adaptation of Acrylic Resins

Deste¹,

Durkan²,

Oyar³

et al. 2021

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi

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“…Denture retention denotes the force required to completely remove a denture from its basal seat (The Glossary of prosthodontic term, 2005). Denture retention is understood to be a function of saliva surface tension, its viscosity, the thickness of salivary film, the contact surface, and salivary denture contact angle, and displacement of the contact line of the liquid film on the denture under the application of the dislodging force plays a predominant role in denture retention (Monsenego and Proust, 1989), internal adaptation of resin bases to the underlining residual ridge tissue, is a fundamental requirement for the final success of complete denture (Gomes et al, 2004). Polymethylemethacrylate (PMMA) resin is found to have a favorable combination of properties that accounts for its popularity of use.…”

Section: Introductionmentioning

confidence: 99%

Comparison between Retention of Maxillary Acrylic and Nylon Denture Base Materials

Abdulkareem

Salem

2020

Polytechnic j.

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Loss of teeth is a matter of great concern to majority of the people and their replacement by artificial substitutes, such as dentures, is vital to the continuance of normal life. One of the factors influence patient responses regarding their complete dentures is the quality of retention. Complete denture base is composed of heat polymerized polymethylemethacrylate (PMMA). However, this material presents limitations, particularly in terms of flexural and impact strength and patients representing allergic reaction to PMMA. Nylon denture base material could be useful alternative to PMMA, especially in the patient shows allergy to PMMA. This study was conducted to estimate the difference between retention of conventional acrylic and Valplast maxillary denture base. Ten edentulous patients (five males and five females) with an age range of 45–60 years. For each patient two maxillary dentures were constructed, one from acrylic resin and other from Valplast denture base materials. Specially designed strain gauge–measuring device was used to measure the force required to dislodge the two dentures from basal seats. Six measurements of retention of newly inserted denture base were recorded for each patient (three for maxillary acrylic denture base and three for maxillary nylon denture base). Using paired t-test, a significant improvement in retention obtained by nylon denture base materials in comparison with conventional maxillary acrylic denture base, for both male and female. The retention force that obtained for each patient does not represent the quality of retention for that patient, because we measured the retention at static state and the measurements for each patient were done at same visit of insertion.

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“…In the oral cavity, an intimate contact between the denture and mucosa must be establish in order to provide an adequate adaptation and, consequently, great retention (6). The internal surface receives a gentle polishing incapable of turning into a smooth surface as the external aesthetic surface receives (< 0.02 µm Ra) (7). This different polishing seeks to preserve the close contact between the mucosa and complete denture but, at the same time, these high roughness values of internal surface of dentures create a pleasant reservoir for the fungi (8,9).…”

Section: Introductionmentioning

confidence: 99%

Anti-adherent and antifungal activity of synthetic and organic adhesive polymers on >i<Candida albicans>/i< biofilms

Toala¹

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Não tenho como te retribuir nem palavras para te agradecer o esforço que você fez neste tempo porque foi pelo nosso projeto no Equador que a gente decidiu morar tão longe e agora temos o resultado deste processo acadêmico e profissional. É só o inicio, ainda temos muitas conquistas pela frente. Te amo!! Mãe: Sentindo sempre sua falta quando precisava de qualquer coisa na vida, o tempo e a distancia só poderia ter me ajudado para ser mais forte e independente. Foram muitos aniversários que passei longe de você mas estamos bem perto de morar todos juntos de novo. Te amo!! Irmão: Querido ´ñañito´, neste tempo nosso laço ficou muito mais forte e estável. Sempre vou te olhar como meu irmãozinho mesmo com 50 anos você será o mais novo pra mim.Quando as coisas estejam difíceis, sempre lembra que aqui estou para te ajudar. Dedicatória

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Adaptation of complete denture bases submitted to chemical polishing

Abstract: The present results suggest that Veracril® resin denture bases submitted to chemical polishing had decrease of internal adaptation in 30 days, although immediate adaptation was not affected.

Cited by 4 publications

References 7 publications

The Effect of Autoclave and Heat Polymerization Techniques of Internal Adaptation of Acrylic Resins

The Effect of Autoclave and Heat Polymerization Techniques of Internal Adaptation of Acrylic Resins

Comparison between Retention of Maxillary Acrylic and Nylon Denture Base Materials

Anti-adherent and antifungal activity of synthetic and organic adhesive polymers on >i<Candida albicans>/i< biofilms

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