Effect of repeated cycles of chemical disinfection on the roughness and hardness of hard reline acrylic resins

Pinto, Luiz Fernando Spinelli; Acosta, Emílio José Tabaré Rodríguez; Távora, Flora Freitas Fernandes; Silva, Paulo Maurício Batista da; Porto, Vinícius Carvalho

doi:10.1111/j.1741-2358.2009.00282.x

Cited by 77 publications

(31 citation statements)

References 40 publications

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“…This might be caused by differences between the functional monomers. The MDP functional monomer is well known to be effective in adhesive bonding to base metals 12,13,17 ; the hydrogen phosphate group chemically bonds to metal oxides, including titanium oxide on cp-Ti and cobalt and chromium oxides on Co-Cr. Nevertheless, with respect to the two reline materials, neither of the primers was effective for bonding.…”

Section: Discussionmentioning

confidence: 99%

“…In addition to the above treatments, chemical treatments using functional monomers after air-abrasion is also useful for enhancing the adhesive performance of cp-Ti 10,11,19,23 and Co-Cr alloys 11,12 . For enhancing the bond strengths of Ti and Co-Cr alloys to heat- and auto-polymerizing denture base resins, the use of metal conditioners is also effective 13,17 . According to Matsuda, et al 11 (2010), air-abrasion and treatment with a diphosphate monomer was most effective for both the Cp-Ti and Co-Cr.…”

Section: Introductionmentioning

confidence: 99%

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Factors affecting the bond strength of denture base and reline acrylic resins to base metal materials

et al. 2013

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Corresponding address: Naomi Tanoue -Division of Fixed Prosthodontics -Nagasaki University Hospital, 1-7-1 -Sakamoto Nagasaki -852-8501 -Japan -Phone: +81-95-819-7688 -Fax: +95-819-7689 -e-mail: t-naomi@nagasaki-u.ac.jp 6XEPLWWHG -DQXDU\ 0RGL¿FDWLRQ $SULO $FFHSWHG 0D\O bjective: The shear bond strengths of two hard chairside reline resin materials and an auto-polymerizing denture base resin material to cast Ti and a Co-Cr alloy treated using four conditioning methods were investigated. Material and Methods: Disk specimens (diameter 10 mm and thickness 2.5 mm) were cast from pure Ti and Co-Cr DOOR\ 7KH VSHFLPHQV ZHUH ZHWJURXQG WR D ¿QDO VXUIDFH ¿QLVK RI JULW DLUGULHG DQG treated with the following bonding systems: 1) air-abraded with 50-70-μm grain alumina (CON); 2) 1) + conditioned with a primer, including an acidic phosphonoacetate monomer (MHPA); 3) 1) + conditioned with a primer including a diphosphate monomer (MDP); 4) treated with a tribochemical system. Three resin materials were applied to each metal specimen. Shear bond strengths were determined before and after 10,000 thermocycles. Results: The strengths decreased after thermocycling for all combinations. Among the UHVLQ PDWHULDOV DVVHVVHG WKH GHQWXUH EDVH PDWHULDO VKRZHG VLJQL¿FDQWO\ S JUHDWHU shear bond strengths than the two reline materials, except for the CON condition. After 10,000 thermocycles, the bond strengths of two reline materials decreased to less than 10 MPa for both metals. The bond strengths of the denture base material with MDP were VXI¿FLHQW 03D IRU FDVW 7L DQG IRU &R&U DOOR\ &RQFOXVLRQ %RQGLQJ RI UHOLQH UHVLQ PDWHULDOV WR PHWDOV DVVHVVHG ZDV FOLQLFDOO\ LQVXI¿FLHQW UHJDUGOHVV RI PHWDO W\SH surface treatment, and resin composition. For the relining of metal denture frameworks, a denture base material should be used.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Factors affecting the bond strength of denture base and reline acrylic resins to base metal materials

et al. 2013

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“…The surface properties of PMMA denture base material can be affected by hardness, which is characteristic of the ease of finishing the material as it is resistant to in-service scratching during cleansing (De Rezende Pinto et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effect of Henna Addition on the Surface Roughness and Hardness of Polymethylmethacrylate Denture Base Material: An In-vitro Study

Nawasrah¹,

Gad²,

Zayat³

2017

Preprint

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Statement of problem:Henna has been added to polymethylmethacrylate (PMMA) as a new type of antifungal agent; however, its effect on the latter's physical properties has not been investigated. Purpose:This study aimed to evaluate the effect of the addition of various henna concentrations on the surface roughness and hardness of PMMA denture base material. Materials and Methods:A total of 99 specimens of rectangular-shaped (10×20×3 mm 3 ) acrylic specimens were prepared from heat-cured acrylic resin. Specimens were divided into one control group without the addition of henna and five test groups, which were prepared by adding Yamani henna powder to acrylic powder at concentrations of 1wt%, 2.5wt%, 5wt%, 7.5wt%, and 10wt%. The polymer was added to the monomer before being mixed, packed, and processed using the conventional water bath method. After processing, specimens were finished and polished, then kept in distilled water for 48+2 h. A profilometer and Vickers hardness tester were used to measure surface roughness and hardness respectively. Statistical data analysis was conducted via SPSS version 20.0 (IBM, USA). Results:The addition of henna at varying concentrations significantly increased surface roughness values (P ≤ 0.01) while decreasing hardness (P ≤ 0.0001). The most favorable addition value was 1% henna between all henna groups. Conclusion:The addition of henna to the acrylic resin may negatively affect the surface properties of PMMA acrylic denture base.

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“…Regular cleaning and removal of microbial biofilm from denture surfaces is necessary for prevention and control of denture stomatitis in edentulous patients (10). There are numerous investigations in the dentistry literature advising the use of chemical solutions for denture disinfection (11-13); unfortunately these products cause mucosal allergic reactions, damage the acrylic resin and metal alloys of the dentures (14, 15). …”

Section: Introductionmentioning

confidence: 99%

Antifungal Effect of Zataria multiflora Essence on Experimentally Contaminated Acryl Resin Plates With Candida albicans

Jafari¹,

Tafti²,

Hoseiny³

et al. 2015

Iran Red Crescent Med J

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Background:Adherence and colonization of Candida species particularly C. albicans on denture surfaces, forms a microbial biofilm, which may result denture stomatitis in complete denture users.Objectives:The purpose of the present study was to evaluate the antifungal effect Zataria multiflora essence in removing of Candida albicans biofilms on experimentally contaminated resin acryl plates.Materials and Methods:In the present experimental study, 160 resin acrylic plates (10 × 10 × 1 mm) were contaminated by immersion in 1 × 103 C. albicans suspension for 24 hours to prepare experimental Candida biofilms. The total number of Candida cells, which adhered to 20 randomly selected acryl resin plates was determined as the Candia load before cleaning. The remaining 140 plates were divided to seven groups of 20 and immersed in five concentrations of Zataria multiflora essence from 50 to 3.125 mg/mL as test, 100000 IU nystatin as the positive and sterile physiologic serum as the negative control. The remaining Candida cells on each acryl plate were also enumerated and data were analyzed using the SPSS 16 software with Kruskal-Wallis and Wilcoxon tests.Results:Zataria essence at concentrations of 50 and 25 mg/mL removed 100% of attached Candida cells similar to nystatine (MFC), while weaker Zataria essence solutions cleaned 88%, 60.5% and 44.7% of attached Candida cells. Kruskal-wallis test showed a statistically significant difference between all test groups (P = 0.0001). In this study 12.5 mg/mL concentration of Zataria multiflora was considered as the minimum inhibitory concentration (MIC90).Conclusions:Zataria essence, at concentrations of 50 and 25 mg/mL, effectively removed Candida cells that had adhered to the denture surface, similar to the level of removal observed for 100000 IU nystatin.

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Effect of repeated cycles of chemical disinfection on the roughness and hardness of hard reline acrylic resins

Cited by 77 publications

References 40 publications

Factors affecting the bond strength of denture base and reline acrylic resins to base metal materials

Factors affecting the bond strength of denture base and reline acrylic resins to base metal materials

Effect of Henna Addition on the Surface Roughness and Hardness of Polymethylmethacrylate Denture Base Material: An In-vitro Study

Antifungal Effect of Zataria multiflora Essence on Experimentally Contaminated Acryl Resin Plates With Candida albicans

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