• Title/Summary/Keyword: Dental wear

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Wear Characteristics of Dental Prosthesis (치과보철물 재료의 마멸특성)

  • Choi, Won-Sik;Kim, Won-Ku
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.7 no.3
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    • pp.110-114
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    • 2008
  • In this study, to examine the friction coefficient and wear amount of dental prosthesis, pin-on-disk type wear test were at room temperature. Vickers hardness and fracture toughness measurement of dental materials were preformed. Microscopic observations on worn surfaces of specimens were conducted by SEM. The friction coefficient of dental material was investigated according to weight and slinging velocity. dental material have investigated composed to nature teeth.

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Fracture and Wear Behavior of Dental Composite Resins Containing Prepolymerized Particle Fillers (유기복합필러를 함유하는 차과용 컴퍼짓 레진의 파괴와 마멸거동)

  • Kim, Yeong-Bin;Kim, Gyo-Han;Kim, Seok-Sam;Im, Jeong-Il
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.2 s.173
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    • pp.464-471
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    • 2000
  • The fracture and wear behavior of dental composite resins containing prepolymerized particle fillers were investigated. Composite resins such as Metafil, Silux Plus, Heliomolar and Palfique Estelite were selected as specimens and contents of filler in specimens in order to evaluate the effect of prepolymerized particle fillers in fracture and wear characteristics. Ball on flat wear tester was used for the wear test at room temperature. The friction coefficient of Metafil was quite high relatively, and the wear resistances of Silux Plus and Palfique Estelite were better than those of Metafil and Heliomolar at the same experimental condition. It was found that the main wear mechanism was abrasive wear containing of plastic deformation of dental material.

COMPARISON OF WEAR RESISTANCE AMONG RESIN DENTURE TEETH OPPOSING VAR10US RESTORATIVE MATERIALS (수복재료에 대합되는 의치용 레진치의 마모저항성 비교)

  • Lee, Chul-Young;Chung, Moon-Kyu
    • The Journal of Korean Academy of Prosthodontics
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    • v.37 no.3
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    • pp.313-327
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    • 1999
  • The aim of this study was to compare wear resistance of resin denture teeth opposing various restorative materials. The wear resistance of conventional acrylic resin teeth(Trubyte Biotone) and three high-strength resin teeth(Bioform IPN, Endura, SR-Orthosit-PE) opposing different restorative materials(gold alloys, dental porcelain, composite resin) was compared. Wear tests were conducted with a sliding-induced wear testing apparatus which applied 100,000 strokes to the specimen in a mesio-distal direction under conditions of 100 stroke/min and constant loading of 1Kgf/tooth. Wear resistance of the resin denture teeth was evaluated by the following criteria : 1) wear depth, 2) weight loss, and 3) SEM observation. Results were as follows. 1. When opposed to gold alloys and composite resin, high-strength resin teeth showed superior wear resistance compared to acrylic resin teeth. But, in cases opposing dental porcelain, differences between the wear of the high-strength and acrylic resin teeth were not statistically significant (p<0.05). 2. When comparing wear resistance among high-strength resin teeth, opposing gold alloys, Endura was slightly more resistant and while in cases opposing dental porcelain, SR-Orthosit-PE was showed to be slightly resistant(p<0.05). 3. The wear of high-strength resin teeth was greater by 5 to 7 times when opposing porcelain and 2 to 3 times when opposing composite resin compared to gold alloys(p<0.05). 4. SEM observations of the wear surface showed that wear of resin teeth opposing gold alloys is a fatigue type of wear and wear of resin teeth opposing dental porcelain is fatigue and abrasion type of wear. Trubyte Biotone showed more severe fatigue type of wear than high-strength resin teeth. In conclusion, the use of dental porcelain should seriously be considered as restorative material in cases opposing resin denture teeth and improvement seems to be needed on resin teeth in the areas of wear resistance.

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Wear Behaviours of Dental Composite Resins Containing Prepolymerized Particle Fillers (1st Report) (有機複合필러를 包含하는 齒科用 콤포짓트 레진의 磨耗擧動(제1보))

  • 임정일;김교한;김석삼
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 1998.10a
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    • pp.124-130
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    • 1998
  • The wear characteristics and wear mechanisms of dental composite resins were investigated. Composite resins such as Metalii, Silux Plus, Heliomolar and Palfique Estelite were selected as specimens and contents of filler in specimens in order to analyze the effect of Prepolymerized Particle Fillers in friction and wear characteristics. Ball on flat wear tester was used for a wear test. Friction and wear tests are carried out at room temperature. The friction coefficient of Metafil was quite high relatively, and the wear resistance of Silux Plus and Palfique Estelite was better than that of Metafil and Hellomolar at the same experimental condition. The main wear mechanism is plastic flow and abrasive wear by crack propagation.

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In vitro evaluation of a removable partial denture framework using multi-directionally forged titanium

  • Suzuki, Ginga;Shimizu, Satoshi;Torii, Mana;Tokue, Ai;Ying, Guo;Yoshinari, Masao;Hoshi, Noriyuki;Kimoto, Katsuhiko;Miura, Hiromi;Hayakawa, Tohru;Ohkubo, Chikahiro
    • The Journal of Advanced Prosthodontics
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    • v.12 no.6
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    • pp.369-375
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    • 2020
  • PURPOSE. This study evaluated the availability of multi-directionally forged (MDF) titanium (Ti) as a component of removable partial dentures (RPDs). MDF-Ti remarkably improved the mechanical properties of RPDs due to its ultrafine-grained structure. MATERIALS AND METHODS. The wear resistance, plaque adhesion, and machinability of MDF-Ti were tested. As controls, commercially pure (CP) titanium was used for wear, plaque adhesion, and machinability tests. For wear resistance, the volume losses of the titanium teeth before and after wear tests were evaluated. Plaque adhesion was evaluated by the assay of Streptococcus mutans. In the machinability test, samples were cut and ground by a steel fissure bur and carborundum (SiC) point. An unpaired t-test was employed for the analysis of the significant differences between MDF-Ti and the control in the results for each test. RESULTS. Wear resistance and plaque adherence of MDF-Ti similar to those of CP-Ti (P>.05) were indicated. MDF-Ti exhibited significantly larger volume loss than CP-Ti in all conditions except 100/30,000 g/rpm in machinability tests (P<.05). CONCLUSION. Although the wear resistance and plaque adherence of MDF-Ti were comparable to those of controls, MDF-Ti showed better machinability than did CP-Ti. MDF-Ti could be used as a framework material for RPDs.

Tribological Evaluation of Dental Composite Resins Containing Prepolymerized Particle Fillers

  • Ren, Jing-Ri;Kim, Kyo-Han;Kim, Seock-Sam
    • Journal of Mechanical Science and Technology
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    • v.15 no.6
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    • pp.727-734
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    • 2001
  • The Tribological evaluation of commercial dental composite resins containing prepolymerized particle fillers was investigated. Composite resins such as Metafil, Silux Plus, Heliomolar, and Palfique Estelite were selected as specimens. In the wear tests, a ball-on-flat wear test method was used. The friction coefficient of Metafil was quite high. The wear resistance of Silux Plus and Palfique Estelite was better than that of Metafil and Heliomolar under the same experimental conditions. The main wear mechanism of the composite resins containing prepolymerized particle fillers was abrasive wear caused by the brittle fracture of the prepolymerized particles and the debonding of the filler and the matrix.

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Association between smoking behavior and denture wear in the elderly aged 65 years and older in South Korea: The 7th Korea National Health and Nutrition Examination Survey (우리나라 65세 이상 노인의 흡연과 의치장착 관련성: 제7기 국민건강영양조사를 바탕으로)

  • Cho, Mi-Do;Lim, Sun-A
    • Journal of Korean society of Dental Hygiene
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    • v.22 no.5
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    • pp.341-346
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    • 2022
  • Objectives: This study was conducted to analyze the relationship between smoking and denture wear in the elderly individuals aged 65 years and older, and a total of 3,112 people were included. Methods: A complex sample chi-square test was performed for denture wear according to general, smoking, and smoking-related characteristics. Factors related to denture wear were assessed using multiple logistic regression analysis. Results: Among non-smokers, present smokers were 4.192 times more likely to wear dentures, and former smokers were 2.195 times more likely to wear dentures. The average number of daily past smokers was 0.564 times less likely to wear dentures if they smoked 15 cigarettes or less per day. Conclusions: Smoking among the elderly and wearing dentures are related, and it is necessary to develop and utilize a smoking cessation education program considers socioeconomic characteristics.

Wear of contemporary dental composite resin restorations: a literature review

  • Dimitrios Dionysopoulos;Olga Gerasimidou
    • Restorative Dentistry and Endodontics
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    • v.46 no.2
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    • pp.18.1-18.13
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    • 2021
  • Composite resins are the most commonly used dental restorative materials after minimally invasive dental procedures, and they offer an aesthetically pleasing appearance. An ideal composite restorative material should have wear properties similar to those of tooth tissues. Wear refers to the damaging, gradual loss or deformation of a material at solid surfaces. Depending on the mechanism of action, wear can be categorized as abrasive, adhesive, fatigue, or corrosive. Currently used composite resins cover a wide range of materials with diverse properties, offering dental clinicians multiple choices for anterior and posterior teeth. In order to improve the mechanical properties and the resistance to wear of composite materials, many types of monomers, silane coupling agents, and reinforcing fillers have been developed. Since resistance to wear is an important factor in determining the clinical success of composite resins, the purpose of this literature review was to define what constitutes wear. The discussion focuses on factors that contribute to the extent of wear as well as to the prevention of wear. Finally, the behavior of various types of existing composite materials such as nanohybrid, flowable, and computer-assisted design/computer-assisted manufacturing materials, was investigated, along with the factors that may cause or contribute to their wear.

Friction of the Gold-Alloy Dental Prosthesis (치과용 금합금-보철물의 마찰특성)

  • Choi, Won-Sik
    • Tribology and Lubricants
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    • v.24 no.1
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    • pp.44-48
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    • 2008
  • The wear characteristics of the gold alloy dental prosthesis have been investigated. The wear tests were performed by using a pin-on-disk wear tester at room temperature. Vickers hardness and fracture toughness measurement of dental materials were preformed. Microscopic observations on worn surfaces of specimens were conducted by microscope. The friction coefficient of the gold alloy dental prosthesis was investigated according to weight and slinging velocity. The hardness of the gold alloy dental prosthesis were similar and a half of the enamel of natural teeth.

Wear Behaviours of Dental Composite Resins Containing Prepolymerized Particle Fillers (1st Report) (유기복합필러를 포함하는 치과용 콤포짓트 레진의 마모거동(제1보))

  • 임정일;김교한;김석삼
    • Tribology and Lubricants
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    • v.15 no.2
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    • pp.212-217
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    • 1999
  • The wear characteristics and wear mechanisms of dental composite resins were investigated. Composite resins such as Metafil, Silux Plus, Heliomolar and Palfique Estelite were selected as specimens and contents of filler in specimens in order to evaluate the effect of Prepolymerized Particle Fillers in friction and wear characteristics. Ball on flat wear tester was used for the wear test at room temperature. The friction coefficient of Metafil was quite high relatively, and the wear resistances of Silux Plus and Palfique Estelite were better than that of Metafil and Heliomolar at the same experimental condition. It was found that The main wear mechanism is plastic flow and abrasive wear by failure of filler's bond to the matrix.