Polishing of Denture Base Acrylic Resin with Chairside Polishing Kits: An SEM and Surface Roughness Study

Chatzivasileiou, Konstantinos; Emmanouil, Ioannis; Kotsiomiti, Eleni; Pissiotis, Argirios

doi:10.11607/ijp.3157

Cited by 16 publications

(18 citation statements)

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“…The results of the current study also showed that, even though Parylene C deposition resulted in smoother surfaces, it failed to produce surfaces with Ra values less than 0.2 μm, the threshold for microbial colonization. 11 Parylene coating, it seems, cannot replace the traditional finishing and polishing procedure of PMMA [19][20][21] in terms of initial surface roughness. However, as the fitting surface cannot be exposed to finishing treatment and constitutes the main area of bacterial accumulation and growth, Parylene coating can still be beneficial by producing smoother surfaces, which may also be more abrasion-resistant.…”

Section: Discussionmentioning

confidence: 99%

“…36 A noncontact profilometer was selected in contrast with a number of studies, in which measurement of the surface topography of acrylic resin specimens after different polishing procedures was performed by a contact stylus-type profilometer. [19][20][21] The use of a diamond or ruby stylus is related to potential damage of the specimen while it is moving on its surface. In addition, the stylus usually measures the deviations in the vertical direction without taking into account the average gradient of the surface roughness 37 and involves a more complicated procedure.…”

Section: Discussionmentioning

confidence: 99%

“…14,15 However, the SFE of a substrate is a weaker determinant of bacterial adhesion compared with its surface roughness, 16 and these properties are also affected by the acquired salivary pellicle. 17,18 Although various studies [19][20][21] have shown that laboratory and chairside polishing techniques can achieve a surface roughness below the 0.2-μm threshold for the polishing surfaces of intraoral removable prostheses made of PMMA, this does not hold true for the fitting surfaces. Denture base materials processed under ideal laboratory conditions after wax pattern investment still show Ra measurements between 3.4 and 7.6 μm.…”

Section: Introductionmentioning

confidence: 99%

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Effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA

Bourlidi

Qureshi²,

Soo

et al. 2016

The Journal of Prosthetic Dentistry

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Statement of the Problem. The colonization of micro-organisms on acrylic resin dentures may result in denture-induced stomatitis. No efficient coating has yet been proposed to address this issue. Purpose. The purpose of this in vitro study was to assess the effect of various initial surface finishes and different Parylene (P) coating thicknesses on the surface roughness (Ra) and surface free energy (SFE) of Parylene coated polymethyl methacrylate (PMMA). Material and Methods. One hundred and sixty PMMA specimens were produced and divided into 8 groups as follows: Group A: uncoated-1000grit finish; group Ap1: 10 μm P coated -1000grit finish; group B: uncoated -1200grit finish; group Bp: 10 μm P coated -1200grit finish; group C: uncoated2400grit finish; group Cp: 10 μm P coated -2400grit finish; group Ap2: 20 μm P coated -1000grit finish; group Ap3: 30 μm P coated -1000grit finish. The Ra of all specimens was measured with a noncontact profilometer. To calculate the SFE, the Owens-Wendt approach was applied after measuring the contact angles with a goniometer. The topography of the specimens was observed by scanning electron microscope. I am happy to report that the reviewers of manuscript #JPD-D-15-00013R3, entitled "The effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA," have recommended that it be accepted for publication, pending your responses to the following final requests:Please review the edited manuscript to ensure that your meaning has not been inadvertently altered. Please address the comments.Answer: Thank you for the acceptance of our work for publication to the JPD. We are now submitting the final revision of the manuscript entitled "The effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA". We have accepted all Track Changes and responded to the minor queries requested. The additions are marked in blue as per the instructions.We have uploaded the TIFF files of the images without labels as requested. The images uploaded are not in composite form, but individual images. We have only left the composite images in the manuscript file for ease of final proof editing by your team.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA

Bourlidi

Qureshi²,

Soo

et al. 2016

The Journal of Prosthetic Dentistry

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“…Chatzivasileiou ve ark. 20 hasta baĢında kullanılan cila setlerinin etkinliğini değerlendirmek amacıyla, ısı ile polimerize olan akrilik rezinleri farklı tekniklerle cilalamıĢ ve yüzey pürüzlülük değerlerini karĢılaĢtırmıĢ-lardır. ÇalıĢma sonuçlarına göre en düĢük pürüzlülük değerlerinin laboratuarda cilalanan gruplarda görül-mesine rağmen, hasta baĢında uygulanan cila iĢlem-lerinin de gerekli durumlarda alternatif olarak kulanı-labileceğini bildirmiĢlerdir.…”

Section: Discussionunclassified

Protez Ci̇la Materyalleri̇ni̇n Farkli Kai̇de Maddeleri̇ni̇n Yüzey Pürüzlülüğüne Etki̇si̇

Ayaz¹,

Bağış²,

Turğut³

2016

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi

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ÖZETAmaç: Protez kaide materyallerinin yüzey pürüzlülüğü protezin klinik kullanımını etkileyen önemli bir özel-liktir. Bu çalıĢmanın amacı farklı cila materyallerinin polimetilmetakrilat (PMMA) ve poliamid içerikli protez kaide maddelerinin, temizleme tableti uygulama sonrası yüzey pürüzlülüğüne etkisinin değerlendirilmesidir. Gereç ve Yöntem: ÇalıĢmada polimetilmetakrilat (QC -20) ve poliamid (Deflex) esaslı iki farklı kaide maddesi kullanılarak toplamda 60 adet örnek 3 mm kalınlık ve 20 mm çapta diskler halinde (n=10) hazırlandı. Kontrol grubunda örnekler pomza ve kıl fırça ile cilalandı. Ġkinci grup örneklere pomza ile yapılan cilayı takiben Universal Polishing Paste, üçüncü gruba ise Palaseal cila materyali uygulandı. Yüzey pürüzlülük öl-çümleri örnekler efervesan tablet formundaki Corega temizleyici solüsyon uygulamadan önce ve sonra dijital bir profilometre cihazı kullanılarak yapıldı. Örneklerin pürüzlülük değiĢiklikleri (Ra) iki yönlü varyans analizi ve Fisher's LSD test ile istatiksel olarak karĢılaĢtırıldı (p<0,05) Bulgular: Cila materyalleri ve protez kaideleri arasın-da istatiksel olarak anlamlı etkileĢimler bulundu (p< 0,001). Cila materyali uygulanan bütün örnekler, sadece pomza ile cilalanan kontrol gruplarına göre daha düĢük pürüzlülük değerleri gösterdi (p<0,001). Protez temizleyicisi polimetilmetakrilat ve poliamid rezinlerinin pürüzlülüğünü anlamlı olarak arttırdı (p<0,001) Sonuç: Protez cila materyallerinin uygulanması ile protez yüzeylerinin daha düzgün hale getirilebileceği ve protez temizleyici tabletlerin neden olabileceği yüzey pürüzlülüğünü azaltabileceği göz önünde bulundurulmalıdır. Anahtar Kelimeler: polimetilmetakrilat; poliamid; protez temizleyicileri; yüzey pürüzlülüğü ABSTRACT Aim: Surface roughness of denture base materials is an important property that affects clinical use of the prostheses. The aim of this study is to evaluate the effect of different polishing materials on surface roughness of polymethlymethacrylate and polyamide denture base resins after use of a denture cleaner. Material and Method: Total of 60 samples were prepared from polymethlymethacrylate (QC-20) and polyamide (Deflex) as 3 mm thickness and 20 mm diameter disc shaped (n=10). Samples were polished with pumice and bristle brush in control groups. Universal Polishing Paste were subjected to the second group after pumice and Palaseal were subjected to the third group. Surface roughness test was performed with a digital prophylometer (Ra) before and after effervesance denture cleaner (Corega). Data were analysed by two way ANOVA and Fischers LSD post hoc test (p<0,05). Results: Polish materials and denture bases showed significant interactions (p<0,001). Groups polished with polish materials showed significantly lower surface roughness values when compared to control groups that polished only with pumice (p<0,001). Denture cleaner increased the surface roughness of polymethlymethacrylate and polyamide resins significantly (p<0,001). Conclusion: It should be considered that denture polish materials may provid...

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“…Color measurements were obtained using the CIELAB (Commission Internationale de L'Eclarirage) system, which positions the color in a coordinate system 19 . For each artificial tooth, three color measurements were made on each occasion (T0, T1 and T2) on the buccal surface of the tooth, obtaining an average.…”

Section: Spectrophotometric Analysis Of Color Stabilitymentioning

confidence: 99%

Evaluation of methods for stain removal in acrylic resin denture teeth: in vitro study

Cassiano

Leite

Policastro

et al. 2016

Rev. odontol. UNESP

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ResumoIntrodução: O manchamento dos dentes artificiais pode estar relacionado à abrasão da resina acrílica provocada pela escovação, resultando na maior deposição de corantes provenientes de bebidas, e consequentemente maior prejuízo estético. Objetivo: O objetivo do presente estudo foi avaliar métodos de remoção de manchas extrínsecas por meio de analise com espectofotômetro. Material e método: Dentes artificiais foram divididos em 12 grupos (n=10), de acordo com o tipo de tratamento (repolimento -Re ou imersão em perborato de sódio, Corega Tabs -Sp), tipo de solução de manchamento, café (Cf) ou Coca-Cola  (Cc) ou água (W) e com/sem escovação (B). Os métodos de remoção de manchas propostos (Re e Sp) foram realizados de acordo com protocolos pré-estabelecidos. Os espécimes Sp foram submetidos a 7 ciclos de imersão (5 minutos cada). O repolimento foi realizado com pastas de pedra pomes e branco de espanha, utilizando escovas de cerdas macias e rodas de feltro. As leituras de estabilidade de cor (ΔE) foram realizadas por meio de um espectrofotômetro: T0 (baseline), T1 (após escovação/imersão em bebidas), e T2 (após Re ou Sp). Resultado: Alterações de cor entre T1 e T2 (teste T pareado; α=0,05) foram observadas para o grupo CfSp (p=.032); e para os grupos BWRe (p=.000), BCfRe (p=.049) e CcRe (p=.042). Os dentes artificiais submetidos à escovação mostraram maior alteração de cor (ANOVA 2 fatores; p<0,001). Conclusão: Conclui-se que a imersão em perborato de sódio (Corega Tabs) pode ser utilizada para remoção de manchas de café e o repolimento para remoção de manchas de Coca-Cola  . Ainda, a escovação produziu as maiores alterações de cor nos dentes artificiais, independentemente da solução de imersão.Descritores: Dente artificial; prótese total; escovação; estabilidade de cor. AbstractIntroduction: The staining of artificial teeth can be related to the acrylic resin abrasion caused by brushing, resulting in higher deposition of dyes from the beverage, and consequently higher aesthetic damage. Objective: The aim of this in vitro study was to evaluate methods for removal of stains from acrylic denture teeth using spectrophotometric analysis. Material and method: Artificial teeth were divided into twelve groups (n=10) according to the type of treatment (re-polishing -Re or immersion in Corega Tabs -Sp), staining solutions, coffee (Cf) and Coca-Cola  (Cc) or water (W) and with/without toothbrushing (B). The Sp specimens were submitted to seven immersion cycles (5 min each). The Re specimens were polished with pumice stone followed by Spain white paste. Color differences (ΔE) were captured by a spectrophotometer: T0 (baseline), T1 (after brushing/immersion in solutions) and T2 (after Re or Sp). Result: Statistically significant color change between T1 and T2 (paired T-test; α =.05) was observed for the group CfSp (p=.032); and for the groups BWRe (p=.000), BCfRe (p=.049) and CcRe (p=.042). Higher color changes were observed for the specimens submitted to toothbrushing (ANOVA two way; p<.001). Conclusion: It could be c...

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Polishing of Denture Base Acrylic Resin with Chairside Polishing Kits: An SEM and Surface Roughness Study

Cited by 16 publications

References 0 publications

Effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA

Effect of different initial finishes and Parylene coating thickness on the surface properties of coated PMMA

Protez Ci̇la Materyalleri̇ni̇n Farkli Kai̇de Maddeleri̇ni̇n Yüzey Pürüzlülüğüne Etki̇si̇

Evaluation of methods for stain removal in acrylic resin denture teeth: in vitro study

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