• 한국콘텐츠학회논문지
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• 제22권9호
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• pp.583-591
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• 2022

본 연구는 유산균발효유의 타입에 따른 치아부식증의 발생정도를 확인하고, 치아부식증을 예방하는 방법을 확인하고자 하였다. 유산균발효유는 액상발효유, 스터드타입 농후발효유, 드링크타입 농후발효유를 사용했고, 실험에 사용된 치아시편은 우치를 사용했다. 치아부식증을 예방하는 방법으로 유산균발효유에 칼슘을 첨가하는 방법, 유산균발효유 노출 전 치아에 고농도와 저농도의 불소를 도포하는 방법과 이 두 가지 방법을 함께 적용하여 치아부식증의 예방효과를 측정했다. 시편을 실험음료를 침지한 결과 액상발효유의 표면경도가 가장 많이 감소했다. 예방처리 전과 후의 표면경도 차이를 비교했을 때 Ca 2%군과 NaF 0.05%+Ca 0.5%군은 음성대조군과 유의한 차이를 보이지 않아 치아부식증을 예방하는 효과적인 방법임을 확인했다. 하지만 맛의 변화 및 성분의 안정성 등을 고려할 때 고농도의 칼슘을 첨가하는 것 보다 저농도의 칼슘을 첨가하는 방법을 제안한다. 본 연구는 칼슘섭취와 불소도포를 단독으로 또는 동시에 적용함에 따른 차이를 확인하는 의미가 있는 연구이지만 타액 등 구강환경에 의한 작용이 배제되었기에 타액을 이용한 순환모델을 적용하는 후속연구가 필요할 것이다. 따라서 유산균발효 섭취 시 치아부식증의 가능성을 인식하고, 그로 인한 치아부식증을 예방하기 위해서는 저농도 칼슘과 저농도 불소를 함께 사용하는 것을 권장한다.

• The Journal of Advanced Prosthodontics
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• 제12권6호
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• pp.329-337
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• 2020

PURPOSE. To verify the influence of computer-aided design/computer-aided manufacturing (CAD/CAM) implant-supported prostheses manufactured with cobalt-chromium (Co-Cr) and zirconia (Zr), and whether ceramic application, spark erosion, and simulation of masticatory cycles modify biomechanical parameters (marginal fit, screw-loosening torque, and strain) on the implant-supported system. MATERIALS AND METHODS. Ten full-arch fixed frameworks were manufactured by a CAD/CAM milling system with Co-Cr and Zr (n=5/group). The marginal fit between the abutment and frameworks was measured as stated by single-screw test. Screw-loosening torque evaluated screw stability, and strain analysis was explored on the implant-supported system. All analyses were performed at 3 distinct times: after framework manufacturing; after ceramic application in both materials' frameworks; and after the spark erosion in Co-Cr frameworks. Afterward, stability analysis was re-evaluated after 106 mechanical cycles (2 Hz/150-N) for both materials. Statistical analyses were performed by Kruskal-Wallis and Dunn tests (α=.05). RESULTS. No difference between the two materials was found for marginal fit, screwloosening torque, and strain after framework manufacturing (P>.05). Ceramic application did not affect the variables (P>.05). Spark erosion optimized marginal fit and strain medians for Co-Cr frameworks (P<.05). Screw-loosening torque was significantly reduced by masticatory simulation (P<.05) regardless of the framework materials. CONCLUSION. Co-Cr and Zr frameworks presented similar biomechanical behavior. Ceramic application had no effect on the biomechanical behavior of either material. Spark erosion was an effective technique to improve Co-Cr biomechanical behavior on the implant-supported system. Screw-loosening torque was reduced for both materials after masticatory simulation.

• 치위생과학회지
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• 제12권6호
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• pp.696-701
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• 2012

The purpose of this study was to determine pH value of some alcoholic drinks sold in Korea and to provide the basic information which can cause dental erosion. Alcoholic drinks commercially sold were purchased from various big markets in Korea. The sorts of drinks tested in this study consisted of 5 brands of beers, 24 brands of makgeollis, 9 brands of wines and 12 brands of sojus. The test groups were selected randomly and the pH of each beverage was determined using a pH meter he each pH was measured. For statistical data, Mann-Whitney test was used to analyze difference for red wine and white wine and Kruskal-Wallis test was used to compare the pH of each test group. The result of this study was as followings: the mean pH of 5 brands of beers was 4.21, that of 24 brands of makgeollis 3.88, of 9 brands of wines 3.34 and of 12 brans of sojus 7.86. Each test group was significantly different (p<0.05). Except for soju groups, the test groups had a low pH value which can cause dental erosion. In terms of comparing between pH value of red wine and white wine, the result of this study represented that the mean pH of red wine was 3.45 and that of white wine was 3.21. This result showed the pH of two kinds of wine had a low pH which can lead to dental erosion and the difference of two wine were significantly different (p<0.05). As a result, some drinks sold in Korea have a high erosive potential on teeth since they have a comparatively low pH expect soju. Hence, when we consume some kinds of alcoholic drinks, we make sure to remember that the alcoholics which had a low pH, can have an effect on dental erosion that mean we should avoid to drink some alcoholic drinks with low pH for long time.

• 한국치위생학회지
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• 제17권4호
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• pp.657-667
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• 2017

Objectives: The aim of this study was to evaluate the potential of dental erosion by three different types of commercial fermented milk on the enamel surface of bovine teeth. Methods: Forty bovine teeth (four groups of 10) were immersed in fermented milk (experimental groups: liquid type, condense-stirred type and condense-drink type) or mineral water (control group) for 1, 3, 5, 10, 15, 30, 60, 90 and 120 minutes. Enamel surface microhardness was measured before and after treatment with a microhardness tester, and Scanning Electron Microscope (SEM) was used to assess the enamel surface morphology. Results:Changes in enamel surface microhardness (before-after treatment; ${\Delta}VHN$) were significantly different among the four groups (p<0.05). ${\Delta}VHN$ was highest in the liquid type group, followed by the condense-stirred type, condense-drink type, and control groups. The ${\Delta}VHNs$ of three types of fermented milk groups were higher than that of the control group (p<0.05). The liquid type group showed higher ${\Delta}VHN$ than the other two types of condense fermented milk groups (p<0.05). However, there was no significant difference in ${\Delta}VHN$ between the two types of condense fermented milk (p>0.05). The results of SEM observation have shown the most severe surface damage in bovine teeth immersed in the liquid type of fermented milk. Conclusions: In this study, it appears that liquid type fermented milk causes greater development of dental erosion. The physical properties and pH of fermented milk types must be considered for prevention of dental erosion associated with ingestion of fermented milk.

• 한국치위생학회지
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• 제17권6호
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• pp.969-981
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• 2017

Objectives: The present study aimed to evaluate the preventive effects of exposure to liquid fermented milk containing various concentrations of added calcium on dental erosion, and to investigate the optimal concentration of calcium effective in reducing dental erosion. Methods: The present study consisted of a total of 6 experimental groups: a mineral water group, a fermented milk with no added calcium (0%) group, and four fermented milk with various concentrations of added calcium (0.1%, 0.5%, 1%, and 2%) groups. Twelve specimens were immersed for 1, 3, 5 and 10 minutes in each experimental drink and the change in surface microhardness was measured. Additionally, the surface was observed using a scanning electron microscope. Results: The difference in surface microhardness before and after 10 minutes of immersion in the experimental drink was the highest in the Ca 0% group, followed by the Ca 0.1%, 0.5%, 1%, 2% group and the mineral water group, in that order. The groups with a calcium concentration of more than 0.5% showed statistically significant differences in surface microhardness compared to the Ca 0% group. In addition, when the surface morphology of enamel was observed under a scanning electron microscope, the results showed that the highest level of surface damage was observed in the Ca 0% group, followed by the Ca 0.1%, 0.5%, 1%, 2% group, in that order. Conclusions:The present study confirms that a higher calcium concentration in fermented milk is associated with a higher possibility of preventing dental erosion. The addition of 0.5% calcium, which is a relatively low concentration, did not completely prevent dental erosion, but significantly inhibited dental erosion compared to fermented milk without any added calcium. Therefore, it is suggested that consumers should be educated and provided with guidance to consider the calcium content when choosing fermented milk.

• KSBB Journal
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• 제29권2호
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• pp.112-117
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• 2014

The purpose of this study was to evaluate the influence of energy drinks on the erosion of dental enamel and mouse teeth growth. Exposure of enamel surface to energy drinks stimulated the release of the calcium from enamel surface of teeth. And the surface microhardness of enamel decreased after immersion in energy drinks. Enamel demineralization effects under energy drinks were observed by scanning electron microscope. Effect of maternal energy drink intake on tooth morphology of offsprings was analyzed. We concluded that the energy drinks produced a significant erosion of dental enamel.

• 치위생과학회지
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• 제15권4호
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• pp.419-423
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• 2015

시판 중인 에너지음료의 법랑질 부식능을 알아보기 위하여 판매량이 높은 3종의 에너지음료와 대조군으로 생수를 선정하였다. 각 음료의 pH와 적정산도를 측정하고, 우치시편을 제작하여 음료에 각각 1, 3, 5, 10, 15, 30분을 침지한 후 나타나는 양상을 표면미세경도계를 이용하여 측정한 결과, 다음과 같은 결론을 얻었다. 대조군을 제외한 모든 음료에 구연산이 첨가되어 있었다. 에너지음료의 평균 pH는 $3.01{\pm}0.44$로 번인텐스에서 $2.51{\pm}0.01$로 가장 낮았다. 적정 산도의 평균은 pH 5.5에서 2.98 ml로 번인텐스에서 3.59 ml로 가장 높았다. 모든 에너지음료가 침지시간이 증가함에 따라 표면경도가 감소하였으며 음료 30분 처리 후 표면 경도값은 레드불에서 $119.72{\pm}15.16$ VHN으로 가장 낮은 경도값을 보였고, 핫식스 $208.75{\pm}10.99$, 번인텐스 $210.47{\pm}8.01$ 순이었다. 실험에 사용된 모든 에너지음료는 치아 법랑질에 부식을 유발하였으며, 음료처리 전과 후에 레드불이 가장 낮은 법랑질 표면 경도 값을 보여 실험에 사용한 에너지 음료 중 가장 많은 법랑질 부식을 유발하였다. 이로써 구연산을 함유하고, pH가 낮은 에너지 음료의 섭취는 치아표면경도를 감소시켜 부식을 유발하는 것으로 생각된다.

• 구강회복응용과학지
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• 제33권1호
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• pp.42-46
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• 2017

부식이란 산성의 화학적 물질에 의한 치아 경조직의 손상으로 정의된다. 이에 대한 원인인 산성 음식, 약물, 작업환경 등의 외부적 원인과 위장관 장애에 의한 위산의 역류나 거식증에 의한 의도적 구토의 내부적 원인에 의해 발생된다. 이는 임상적 증상의 심각도에 따라 레진 충전, 라미네이트 수복 또는 전장관 수복으로 치료한다. 본 증례는 잦은 산성 과일의 섭취로 인한 전치부 순측 부식 및 거식증으로 인한 의도적 구토로 전치부 구개측 부식이 일어난 드문 상황에 대한 치료이다.

• 대한치과의사협회지
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• 제43권7호통권434호
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• pp.462-468
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• 2005

• The Journal of Advanced Prosthodontics
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• 제6권5호
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• pp.423-426
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• 2014

This clinical report presents the clinical appearance and treatment approach in a case of excessive anterior teeth erosion resulted from swimming in a poorly-chlorinated swimming pool. Clinical findings revealed tooth sensitivity, severe enamel erosion resembling veneer preparations, and the presence of anterior open bite. A novel hybrid ceramic (Vita Enamic) was chosen for fabricating full-coverage crowns for this patient. After 6-months follow-up, the tooth sensitivity disappeared and the patient was satisfied with esthetic outcome. The hybrid ceramic restorations can be recommended with no complications.