• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제46권1호
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• pp.12-18
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• 2020

Impacted teeth are a frequent phenomenon encountered by every clinician. The artificial eruption of embedded teeth is the process of directing an impacted tooth into normal occlusion. This procedure is currently attracting attention, with the aim of finding the best technique to use according to each case. This article presents key information regarding impacted incisors, canines, and premolars. In addition, we describe the most common techniques to use for artificial eruption, the open and closed techniques. We review the literature concerning these techniques and outline how clinicians can manage every type of impacted tooth.

• 대한치과의사협회지
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• 제27권6호통권241호
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• pp.509-514
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• 1989

국소의치나 총의치에 사용하는 인공치는 대부분 도재치(porcelain teeth)와 레진치(resin teeth, plastic teeth)이다. 도재치나 레진치 모두 자연치아와 유사한 색조를 갖고 있어 자연감을 나타내기 때문이다. 인공치의 대표적인 도재치와 레진치에 대하여 이공학적 측면, 임상측면, 기공측면에서 재료학적 고찰을 한다.

• 대한치과보철학회지
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• 제47권1호
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• pp.82-90
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• 2009

서론: 최근 환자들의 심미에 대한 기대와 관심이 증가하면서 고정성 영역 뿐 아니라 가철성 의치 분야에서도 심미적인 수복에 대한 관심이 증가하고 있다. 이러한 가철성 의치의 심미성은 선택되는 인공치에 의하여 잘 표현된다. 의치용 인공치는 마모저항성 등의 기계적 요구조건은 물론, 색 안정성 등의 심미적인 조건 또한 충족되어야 하며 이러한 인공치의 색 안정성은 의치의 장기적인 성공률에 지대한 영향을 주게 된다. 하지만 의치용 인공치의 변색이나 착색은 의치상 레진과 함께 심미적인 문제를 발생시켜 왔으며 이에 대한 많은 연구들이 보고되었으나 대부분 의치상 레진이나 연성이장재에 대한 것이고 인공치의 경우에도 주로 차나 음료수 등에 대한 것으로 한국인이 자주 섭취하는 음식에 대한 연구는 부족한 실정이다. 이에 본 연구에서는, 대조군을 증류수로 하고 한국인이 자주 섭취하는 간장, 고추장, 커피에 3 종류의 아크릴 레진 치아를 침전시킨 후 분광광도계 (spectrophotometer)로 시간에 따른 색상 변화를 측정하고 비교, 분석하였다. 재료 및 방법: 인공치를 종류별로 40개씩 총 120개를 준비하여 각각 10개씩 오염원 (간장, 고추장, 커피, 증류수)에 침전시킨 후 1일, 1주, 2주, 4주, 8주후에 분광광도계를 이용하여 $L^*$, $a^*$, $b^*$ 값을 측정한 후 CIE 표색계에 따라 $L^*$, $a^*$, $b^*$ 값을 이용하여 ${\Delta}E^*$를 산출하고 통계 처리하여 다음과 같은 결과를 얻었다. 결과: 1. 간장과 커피에서는 침전 시간에 따라 다양한 ${\Delta}E^*$ 값의 차이를 나타냈으나 고추장에서는 침전 시기에 관계없이 Duracross $Physio^{(R)}$가 Trubyte $Biotone^{(R)}$에 비해 유의하게 적은 ${\Delta}E^*$ 값을 보였다 (P<.05). 2. Endura $Anterio^{(R)}$의 8주, Duracross $Physio^{(R)}$의 4주, 8주의 ${\Delta}E^*$ 값을 제외하고는 고추장에 침전된 인공치들은 그 종류에 관계없이 다른 오염원과 비교하여 유의한 ${\Delta}E^*$ 값의 차이를 나타내었다(P<.05). 3. 고추장에 침전된 Endura $Anterio^{(R)}$와 Trubyte $Biotone^{(R)}$의 $a^*$, $b^*$ 값은 Duracross $Physio^{(R)}$의 값과 비교하여 유의한 변화를 보였다(P<.05). 결론: 이상의 결과로 볼 때 Duracross $Physio^{(R)}$가 Endura $Anterio^{(R)}$, Trubyte $Biotone^{(R)}$에 비하여 비교적 적은 색상 변화를 나타내고 고추장이 인공치의 색상변화에 가장 큰 영향을 주는 것으로 보이나 ${\Delta}E^*$ 값이 모두 3.3 이하이므로 임상적으로 허용 가능하리라 사료된다.

• The Journal of Advanced Prosthodontics
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• 제8권5호
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• pp.333-338
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• 2016

PURPOSE. The aim of this study was to compare the effects of different denture cleansers on the surface roughness and microhardness of various types of posterior denture teeth. MATERIALS AND METHODS. 168 artificial tooth specimens were divided into the following four subgroups (n=42): SR Orthotyp PE (polymethylmethacrylate); SR Orthosit PE (Isosit); SR Postaris DCL (double cross-linked); and SR Phonares II (nanohybrid composite). The specimens were further divided according to the type of the denture cleanser (Corega Tabs (sodium perborate), sodium hypochlorite (NaOCl), and distilled water (control) (n=14)) and immersed in the cleanser to simulate a 180-day immersion period, after which the surface roughness and microhardness were tested. The data were analyzed using the Kruskal-Wallis test, Conover's nonparametric multiple comparison test, and Spearman's rank correlation analysis (P<.05). RESULTS. A comparison among the denture cleanser groups showed that NaOCl caused significantly higher roughness values on SR Orthotyp PE specimens when compared with the other artificial teeth (P<.001). Furthermore, Corega Tabs resulted in higher microhardness values in SR Orthotyp PE specimens than distilled water and NaOCl (P<.005). The microhardness values decreased significantly from distilled water, NaOCl, to Corega Tabs for SR Orthosit PE specimens (P<.001). SR Postaris DLC specimens showed increased microhardness when immersed in distilled water or NaOCl when compared with immersion in Corega Tabs (P<.003). No correlation was found between surface roughness and microhardness (r=0.104, P=.178). CONCLUSION. NaOCl and Corega Tabs affected the surface roughness and microhardness of all artificial denture teeth except for the new generation nanohybrid composite teeth.

• 대한심미치과학회지
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• 제9권1호
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• pp.48-57
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• 2000

Direct bonded restoration with composite resin is one of the few areas which the achievement and result are available in chair side. Especially free-hand bonding technique and incremental technique give us challengeable opportunity for restoring severely damaged anterior teeth. If clinicians have keen sense of observation to evaluate polychromatic characteristics of natural teeth, hue, chroma, value, translucency, opacity and correlate the observation result with various kinds of composite resins, they will have privilege to share joy from restoring damaged anterior teeth in chair side immediately.

• 대한치과기공학회지
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• 제42권3호
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• pp.202-207
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• 2020

Purpose: This study is a comparative analysis of the strain according to deposition in a constant temperature water bath after manufacturing ultraviolet (UV)-cured artificial teeth. Methods: As a control group, 10 ready-made artificial teeth were selected as the first molar on the right side of the maxilla (RT group). Silicone was used as a duplicate of the artificial denture teeth. Experimental teeth were prepared in two groups using the prepared silicone mold. In the first experimental group, the UV-cured resin was injected into the negative silicone, followed by irradiation with a UV-curing machine for 5 minutes (5M group). In the second experimental group, the UV-cured resin was injected into the negative silicone, and then irradiated for 30 minutes using a UV-curing machine (30M group). The one-way ANOVA was performed, and post-test was analyzed by Tukey. Results: When immersed in a water bath for 15 days, it was found to be -0.3% in the RT group, -0.6% in the 5M group, and -0.7% in the 30M group. The results revealed -0.2% in the RT group, 0.2% in the 5M group, and -0.2% in the 30M group when they were in the bath for 30 days. Conclusion: In the water bath, the swelling was greater when deposited for 1 to 15 days, but was less when deposited for 15 to 30 days.

• 구강회복응용과학지
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• 제21권1호
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• pp.59-67
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• 2005

The bond strength of denture base resin and resin teeth, is an important factor in the long term prognosis of dentures. The purpose of this study is to find an appropriate combination of commercial denture base resin and artificial resin teeth according to shear bond strength. In this study, the shear bond strength of various denture base resins (Vertex $RS^{(R)}$(Dentimax Ziest, Holland), $PERform^{(R)}$(Hedent GmbH., Germany), SR $IVOCAP^{(R)}$(Ivoclar AG, Schaan, Liechtenstein)) and resin teeth (SR Orthosit PE(Ivoclar AG, Schaan, Liechtenstein), $Trubyte^{(R)}$ $Biotone^{(R)}$(Dentsply, U.S.A.)) was evaluated. 1. In comparison of denture resin, the shear bond strength increased in the order of $IVOCAP^{(R)}$, $PERform^{(R)}$, Vertex $RS^{(R)}$. 2. In resin teeth, $Trubyte^{(R)}$ $Biotone^{(R)}$ showed higher strength, but there was no statistical difference between the groups. 3. According to loading direction, the lingual showed higher strength, but there was no statistical difference. 4. When using SR Orthosit PE, SR $IVOCAP^{(R)}$ showed significantly higher shear bond strength(p<0.05). 5. Fracture tendancy showed more cohesive fractures(59) than adhesive failures(13). $IVOCAP^{(R)}$ showed the most superior results statistically. $Trubyte^{(R)}Biotone^{(R)}$ showed the highest shear bond strength. When using the SR Orthosit PE, it is thought that $IVOCAP^{(R)}$ would present the most superior results.

• 한국수산과학회지
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• 제40권4호
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• pp.220-225
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• 2007

The succession of marine benthic algae and the restoration of an artificial seaweed forest on a porous type (shaped half saw teeth) artificial reef at Jeju island, Korea was studied. Young thalli of Sargassum horneri and Ecklonia cava were attached to different artificial substrates. In general, the succession on the artificial reefs led from filamentous algae to perennial algae and involved more than 25 species that are useful fishery resources, including E. cava. Coralline algae were dominant on the artificial reefs at the Kangjung site. The maximum algal biomass on the artificial reef in October 2005 was $1,990g/m^2$ at Biyang. In conclusion, a climax community and seaweed forest can be attained one year after the substrate is constructed.

• 대한치과기공학회지
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• 제5권1호
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• pp.19-26
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• 1983

I got a conclusion as a result of that in case of constructing a full denture using acrylic resin teeth, porcelain teeth, and forming posterior occlusal surface of the artificial teeth by Type III Gold and Nickel crome alloy thus construdting a full denture and therefore comparing the above case with abrasion of Natural teeth. The result were as follows : 1. The abrasion of Natural teeth and the abrasion of full denture constructed by Type III gold has a close resemblance. 2. The one that has the hightest degree of abrasion is full denture that's using, with acrylic resin teeth, maxillary and mandibular And the lowest abrasion is natural teeth-natural teeth. 3. In case of single denture, that's opposing to natural teeth, the one that has the hightest degree of abrasion is a full denture that's using Acrylic resin teeth and the lowest abrasion is a full denture that's forming occlusal surface by Type III gold. 4. The single denture, which is opposing to type III gold teeth, was abraded above everything by full denture which is constructed by porcelain teeth. 5. In the same teeth, the abrasion of mandibular teeth was greater than that of mandibular teeth was greater than that of maxillary teeth. 6. The abrasion degree of Acrylic resin teeth has no direct mutual connection with material hardness which is opposing to.

• 대한치과보철학회지
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• 제40권5호
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• pp.484-492
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• 2002

The selection of the maxillary anterior artificial teeth is made primarily for esthetics and they must be in harmony with the surrounding oral environment. However the selection of artificial teeth is based on the large degree of subjective judgement or the dentists, therefore, this is one of the most unscientific processes. This study was performed to determine clinically whether there is correlation among the width of the maxillary central incisor(WMCI), the intercanine distance (ICD) the facial width(FW), and the interalar nasal width(IAW) in Korean adults, and to provide the selection standards for the maxillary anterior artificial teeth. The casts were obtained from 91 undergraduate dental students(49 males and 42 females) with Angle's class I occlusion presenting well-arranged intact anterior teeth. The WMCI and ICD were measured on the casts with a vernier calipers($Miltex^{(R)}$, Germany). The photographic procedures under standardized conditions were performed to record each subject's frontal face using digital camera($Olympus^{(R)}$, C-2500L, Japan). The FW and IAW were measured with image analyzer($Image-Pro^{(R)}$ PLUS. media cybermetrics. USA). The results were obtained as follows : 1. The mean WMCI was $8.11{\pm}0.67mm$, ICD was $37.88{\pm}2.15mm$, FW was $141.29{\pm}5.84mm$. and IAW was $37.85{\pm}2.29 mm$. 2. The ratios of FW/WMCI, FW/ICD, IAW/ICD were 17.4, 3.7, 1.0 respectively. 3. All measurements(WMCI, ICD, FW, and IAW) of male group were longer than those of female group significantly in Student's t-test(p<0.01). 4. There was significant correlation between WMCI, ICD, FW, and IAW in Pearson's correlation analysis(p<0.01). 5, The relationship between IAW and ICD shows the strongest correlation among six combinations in linear regression analysis($R^2$=0.753, Y=7.046+0.815X). The FW and IAW could be very reliable guides for the selection of the maxillary anterior artificial teeth.