Acetal resin as an esthetic clasp material

Lekha, K; Savitha, NP; Meshramkar, Roseline; Nadiger, Ramesh K

doi:10.4103/2229-5194.94185

Cited by 30 publications

(23 citation statements)

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“…Also, resin clasps may be resilient enough to engage undercuts for the retention of removable partial dentures but the low Flexural modulus requires coverage of greater cross-sectional area than metal alloys in order to gain useful retention. (20,21) The results of this study regarding the retention and fatigue resistance indicate that group B clasps were constructed from polyamide (Bre-flex 2nd edition) are recorded statistically significant higher mean value of retention after 3, 6 and 12 months represented by 360 , 720 and 1440 cycles than group A:clasps were constructed from polyoxymethylene (Acetal). (29)(30)(31) The retentive force of the clasps polyamide (Bre-flex 2nd edition) did not decrease over the cycling periods.…”

Section: Discussionmentioning

confidence: 81%

“…also, The material should exhibit sufficient amount of esthetic in order to improve the patient comfort and satisfaction, such as thermoplastics resins are limited due to the lack of information provided by manufacturers or literature regarding their color stability and fatigue resistance behavior . (19)(20)(21)(22) Therefore, the present study was conducted to assess the influence of different staining beverages on the color stability of two newly introduced thermoplastic Acetal resin tooth-colored clasp materials by scanning spectrophotometer at different immersion periods. (23,24) Retentive clasp arms must be capable of flexing and returning to their original form .also , must be minimize the stresses on the abutment as much as possible and prevent permanently distorted during service in addition to provide good aesthetic results (25)(26)(27) In this in vitro study the two different materials were used Group A: polyoxymethylene (Acetal) and Group B: polyamide (Bre-flex 2nd edition) for construction RPD esthetic clasp and denture base.…”

Section: Discussionmentioning

confidence: 99%

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EVALUATION THE FATIGUE RESISTANCE AND COLOR STABILITY OF ACETAL RESIN AND BRE- FLEX (2nd EDITION) IN KENNEDY CLASS I REMOVABLE PARTIAL DENTURE. AN IN-VITRO STUDY

Helmy

2018

Egyptian Dental Journal

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Purpose: This study was aimed to compare and evaluate the fatigue resistance and the color stability of polyoxymethylene (Acetal) and Bre-Flex (2nd edition). Materials and Method:Twenty partially edentulous models Kennedy class I were constructed with first premolars are last abutments. Models were divided into two equal groups Group A: Construction of RPD with Polyoxymethylene (Acetal) clasps and denture base, Group B: Construction of RPD with Polyamide (Bre-flex 2nd edition) clasps and denture base. The Retention and fatigue resistance of each clasp after cycling intervals (360 cycles, 720 cycles, 1440 cycles, and 2880 cycles) were measured by applying withdrawal force to it using a universal testing machine. The data of the retentive force magnitudes at different intervals were collected and tabulated. Also, the color change was evaluated after 4 weeks by measured a total 20 specimens for each group (size of the disc was set to 4 mm) in different immersion media cola (acidic pH), Licorice (alkaline pH), (neutral pH) Distilled Water using a portable Reflective spectrophotometer. The data were subjected to statistical analysis using 3-way-ANOVA test, Student's t and paired t-tests. Results:Regarding the retention and fatigue resistance it was found that group B recorded statistically significant higher mean value than group A. Regarding the color change the total effect of the main group on color change (∆E); it was found that group A recorded statistically significant higher change mean value than group B as revealed by two-way ANOVA test (p=<0.0001<0.05). Conclusion:The removable partial dentures were constructed the denture bases and the clasps with the poly amid Bre-flex 2nd edition was exhibited superior color stability and fatigue resistance when compared with the removable partial dentures constructed their claps and denture bases from polyoxymethylene (Acetal).

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

EVALUATION THE FATIGUE RESISTANCE AND COLOR STABILITY OF ACETAL RESIN AND BRE- FLEX (2nd EDITION) IN KENNEDY CLASS I REMOVABLE PARTIAL DENTURE. AN IN-VITRO STUDY

Helmy

2018

Egyptian Dental Journal

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“…4,5 This may be advantageous in clinical situations where esthetics and/or periodontal health are extremely important. 20 Additionally, its usage as stress absorbing action elements, provisional restorations and splints, 17,19,[21][22][23][24] proving to be the "Gen-X material in esthetic restorative dentistry". Polyetheretherketone (PEEK) is another semicrystalline thermoplastic polymer and is considered as a promising alternative in fixed and removable prosthetic dentistry with observed mechanical properties, 25 and adequate mechanical stability to fulfill the basic requirements in the restorative field as showed by recent studies.…”

Section: Discussionmentioning

confidence: 99%

Influence of Oral Rinse Solutions and Tooth Brushing on Stain Ability of Thermoplastic Tooth Colored Prosthetic Materials

Segai

Sharkawy

Abbas

2018

Egyptian Dental Journal

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Objectives:The present study aimed to comparatively evaluate the influence of oral rinse solutions and tooth brushing on stainability of thermoplastic tooth colored prosthetic materials, using computerized spectrophotometry before and after immersion. Materials and Methods:Fifty-six samples (Twenty-eight samples of each material); Acetal resin and polyether ether keton(PEEK) were constructed in the form of discs (10 mm in diameter and 2 mm in thickness). Samples were randomly divided into 4 subgroups (n=7) according to the oral rise solutions (chlorhexidine, benzydamine HCl, alcohol-free mouthwash) and artificial saliva as control. Simulated tooth brushing of samples for 4 min with rotary instruments was applied before immersion in mouth rinses. The mean of color values (L*,a*,b*) of each specimen were measured before and one week after exposure with a Reflective spectrophotometer.Results: regardless to staining solutions totally it was shown that Acetal resin material group recorded higher color change mean value (4.75±0.52 ∆E) than PEEK material group mean value (4.64±0.66 ∆E).The difference between both materials groups means values was statistically nonsignificant as indicated by two-way ANOVA (F=0.31, P=0.5748>0.05). On the other hand Listerine zero recorded the highest color change mean value (5.05±0.5 ∆E) followed by Tantum V solution mean value (4.91±0.37∆E) then CHX solution mean value (4.52±0.7 ∆E) while A. saliva solution recorded the lowest color change mean value (4.29±0.52 ∆E).Conclusions:1-There was a highly significant difference between alcohol free, benzydamine HCL & CHX mouth rinses. The listerine zero showed the highest value in staining potential while CHX was the lowest regarding acetal 2-Among the two thermoplastic restorative materials and although statisticaly non significant, PEEK was found to be the higher color stable material and the higher stain was taken up by acetal resin. 3-There were no significant differences between the discoloration effects of different mouth washes used in this study on PEEK material. Azza A. El-Segai, et al.

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“…Water was absorbed directly damage the bond and forming a void between the layers. 21,25 In thermocycling there was a change in temperature and humidity, while temperature affect the amount of water in the sorption due to coefficient diffusion increases with the temperature difference. 17,26 In clinical use, denture base will be exposed to changes in temperature and saliva.…”

Section: Discussionmentioning

confidence: 99%

Effect of Thermocycling And E-Glass Fiber Addition on Water Sorption And Color Stability of Thermoplastic Nylon Denture Base Material

Ariyani¹,

Nasution²,

Agusnar³

2016

IOSR

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Results : There was an effect of thermocycling with 2000 cycle as the simulation of oral cavity condition for 2 years denture usage on water sorption and color stability in group without E-glass fiber and group with addition of 1% and 1,5% of E-glass fiber. One way ANOVA test showed that there was an effect of E-glass fiber addition on water sorption and color stability of nylon thermoplastic denture base material with and without thermocycling.Conclusion : According to this study, thermocycling shows an effect on water sorption and color stability. Eglass fiber addition to denture base material also affects water sorption and color stability as seen from discoloration of denture base material with the addition of 1% to 1,5% E-glass fiber in thermocycled group is not visible and acceptable (E < 3,3), while in group without E-glass fiber addition, discoloration is clearly seen visually and unacceptable (E > 3,3).

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Acetal resin as an esthetic clasp material

Cited by 30 publications

References 0 publications

EVALUATION THE FATIGUE RESISTANCE AND COLOR STABILITY OF ACETAL RESIN AND BRE- FLEX (2nd EDITION) IN KENNEDY CLASS I REMOVABLE PARTIAL DENTURE. AN IN-VITRO STUDY

EVALUATION THE FATIGUE RESISTANCE AND COLOR STABILITY OF ACETAL RESIN AND BRE- FLEX (2nd EDITION) IN KENNEDY CLASS I REMOVABLE PARTIAL DENTURE. AN IN-VITRO STUDY

Influence of Oral Rinse Solutions and Tooth Brushing on Stain Ability of Thermoplastic Tooth Colored Prosthetic Materials

Effect of Thermocycling And E-Glass Fiber Addition on Water Sorption And Color Stability of Thermoplastic Nylon Denture Base Material

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