• 구강회복응용과학지
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• 제31권1호
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• pp.45-49
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• 2015

본 증례는 기존의 국소의치에서 파절된 metal-ceramic surveyed crown을 complete contour zirconia surveyed crown으로 전환하는 간단하고 편리한 CAD/CAM 기술을 보고하고 있다. 항암치료를 받고 있는 환자의 기존 metal-ceramic surveyed crown 외형, 형태학적 특성, 레스트 시트를 complete contour zirconia surveyed crown으로 제작하는 복제 기법에 대해 보고한다.

• The Journal of Advanced Prosthodontics
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• 제8권4호
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• pp.329-332
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• 2016

Fabricating a surveyed prosthesis beneath an existing partial removable dental prosthesis (PRDP) is a challenging and time-consuming procedure. The computer-aided design/computer-assisted manufacturing (CAD/CAM) technology was applied to fabricate a retrofitted, surveyed zirconia prosthesis to an existing PRDP. CAD/CAM technology enabled precise and easy replication of the contour of the planned surveyed crown on the existing abutment tooth. This technology ensured excellent adaptation and fit of newly fabricated crown to the existing PRDP with minimal adjustments. In this case report, a seventy-year-old male patient presented with fractured existing surveyed crown. Because the existing PRDP was serviceable, new crown was fabricated to the existing PRDP.

• The Journal of Advanced Prosthodontics
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• 제12권4호
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• pp.239-249
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• 2020

PURPOSE. The purpose of this study was to investigate survival rates of the implants used in implant assisted removable partial dentures (IARPDs). MATERIALS AND METHODS. The study was conducted on 21 patients who were treated with IARPDs. The mean follow-up period for IARPD patients ranged from 12 to 185 months (mean 47.9 months). A total of 58 implants were used for IARPDs in two different modalities: 41 for surveyed crowns and 17 for overdentures. The survival of implants was determined by clinical and radiographic evaluations considering relevant factors: location, RPD classification, opposing dentition, splinting, and implant diameter. RESULTS. The survival rate of total 58 implants was 93.1%: 95.1% for implants supporting surveyed crowns and 88.2% for implants used in overdentures. Considering only the implants supporting surveyed crown, regular diameter implants showed a higher survival rate than narrow or wide diameter implants. CONCLUSION. The survival rate of the implants used in IARPDs was 93.1% (surveyed crown: 95.1%, overdenture: 88.2%).

• 구강회복응용과학지
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• 제33권2호
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• pp.135-142
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• 2017

컴퓨터를 이용한 CAD/CAM milling 방식이 치과 분야에도 적용됨에 따라 보다 분석적이고 정밀한 보철물이 제작 가능하게 되었다. 특히, 국소의치의 지대치로 사용되는 서베이드 크라운을 제작하는데 있어 이러한 디지털 방식의 정밀함은 국소의치의 삽입철거로와 언더컷 등이 정확하게 부여될 수 있게 한다. 본 증례는 상악의 다수 치아 상실을 보이는 환자에서 CAD/CAM을 이용하여 전자 서베잉을 통해 적절한 삽입철거로를 부여하고 지르코니아 서베이드 크라운을 제작하였다. 국소의치의 적합도는 우수했으며, 장착 후 안정성과 착탈 시의 유지력 또한 임상에서 적용하는 데에 문제가 없었다.

• Journal of Forest and Environmental Science
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• 제36권4호
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• pp.290-297
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• 2020

This study analyzed and compared the damage rate, natural parasitic rate, and the morphological characteristics of Thecodiplosis japonensis larvae, which inhabit forest areas as control areas to large urban areas in 2018 and 2019. This research was conducted to provide basic data for the management of Thecodiplosis japonensis, which harm pine needles, and the results were as follows. First, the gall formation rate of Thecodiplosis japonensis collected from urban areas was upper-crown 35.59% and 34.25%, mid-crown 25.57% and 27.95%, and lower-crown 25.34% and 26.61%; the gall formation rate of Thecodiplosis japonensis was in the order of upper-crown>mid-crown>lower-crown in 2018 and 2019, respectively. In the control areas, the gall formation rates of Thecodiplosis japonensis in mountain villages in 2018 and 2019 were upper-crown 17.72% and 21.78%, mid-crown 13.85% and 16.97%, and lower-crown 15.12% and 15.79%; thus, in the order of upper-crown>lower-crown>mid-crown. The number of larvae in the galls of needles damaged by Thecodiplosis japonensis was as follows: the average number of larvae in the pine trees of urban areas was 9 and 8 in the upper-crown, 7 and 8 in the mid-crown, and 6 and 7 in the lower-crown respectively. This shows that the number of larvae was fewer in the lower-crown than the upper-crown, and that the number of larvae was higher in 2018 than in 2019. For natural parasitic rate of Thecodiplosis japonensis, the gall formation rate and natural parasitic rate of Thecodiplosis japonensis were surveyed; the natural parasitic rate was 12.5% and 11.8% in urban areas while the rate was 21.7% and 20.9% in mountain villages in respectively in 2018 and 2019.

• The Plant Pathology Journal
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• 제16권5호
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• pp.290-293
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• 2000

The main grape producing regions in Korea were surveyed for the occurrence and relative incidence of crown gall disease on grapevine. The results of the survey showed that the disease tended to affect tetraploid cultivars, which produce a large and sweet fruit but are very weak to cold weather. Incidence of crown gall disease was high on the tetraploid cultivars, Kyoho (Gerbong), Daebong, and Black Olympia while it was low on the diploid cultivars, Cambell Early and Sheridan. The disease incidence was very high on Anseong, Cheonan, and Chincheon, where the major growing areas of tetraploid cultivars and grapevines were burried in the winter to protect from freeze injury, whereas it was low in Yungdong, Kimcheon, and Nonsan. Crown gall disease did not increased with grapevine age on both Cambell Early and Kyoho. It remained low in Cambell Early, but high for all ages on Kyoho, Galls were found on the crown region and mid part of the trunk, but more galls were on small branches and canes on Kyoho grapevines. More than one third of ZKyoho grapevines inspected had galls on multiple locations on grapevines. On Kyoho, 56.3% of the galls covered more than 50% of the crown gall disease affects severely on the cultivar.

• 대한치과보철학회지
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• 제58권1호
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• pp.58-66
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• 2020

완전무치악환자의 보철 치료를 위한 방법 중에서 임플란트 지지 상부보철물을 서베이드 금관의 형태로 제작하여 국소의치의 지대치로 활용하는 임플란트 융합 국소의치(Implant-Assisted Removable Partial Denture, IARPD) 치료가 많은 관심을 받고 있다. 이 치료 방법에서 지대치로 사용되는 임플란트 상부보철물은 유지 형태에 따라 전통적으로 나사 유지형과 시멘트 유지형으로 분류되며 각각 장, 단점이 존재한다. 시멘트 제거, 수리의 어려움, 나사구멍(screw hole)으로 인한 비심미성 등을 극복하기 위해 최근에 새로운 유지 형태의 임플란트 보철 시스템인 EZ crown system (Samwon DMP, Yangsan, Korea)이 소개되었다. 이 시스템은 fixture에 체결되는 나사 일체형의 특수 abutment와 니켈-티타늄 스프링과 지르코니아 볼이 포함된 cylinder 구조물을 microlocking 방식으로 연결하여 유지력을 얻는다. 이번 증례의 환자는 하악 피개의치의 지대치가 발거되어 새로운 의치를 제작하고 싶다는 주소로 내원하였다. 환자 맞춤형의 진단 과정을 통해 전방부의 임플란트 서베이드 보철물을 이용한 임플란트 융합 국소의치를 계획하였다. 특히, 전통적인 방식의 임플란트 상부 보철물들의 단점을 보완하고자 EZ crown system을 적용한 임플란트 서베이드 보철물을 제작하여 기능적, 심미적으로 양호한 결과를 얻을 수 있었기에 이를 보고하는 바이다.

• 한국농공학회논문집
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• 제56권6호
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• pp.149-158
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• 2014

The effects of spot cooling on growing ever-bearing strawberry in hydroponic cultivation during summer by spot cooling system was estimated in plastic greenhouse located in Pyeongchang. The temperature of cooling water was controlled by heat pump and maintained at the range of $15{\sim}20^{\circ}C$. Cooling pipes were installed in root zone and very close to crown. Spot cooling effect was estimated by applying system in three cases which were cooling root zone, crown plus root zone, and crown only. White low density polyethylene pipe in nominal diameter of 16 mm was installed on crown spot, and Stainless steel flexible pipe in nominal diameter of 15A was installed in root zone. Crown and root zone cooling water circulation was continuously performed at flowrates of 300 ~ 600 L/hr all day long. Strawberry yields by test beds were surveyed from Aug. 1 to Sep. 30. The accumulated yield growth rate compared with a control bed of crown cooling bed was 25 % and that of crown plus root zone cooling bed was 25 % and that of root zone cooling bed was 20 %. The temperatures of root spot in root zone cooling was maintained at $18{\sim}23.0^{\circ}C$ and that of crown spot in crown cooling was maintained at $19{\sim}24^{\circ}C$. Also, the temperatures of root spot in crown plus root zone cooling bed was maintained at $17.0{\sim}22.0^{\circ}C$ and that of crown spot was maintained at $19{\sim}25^{\circ}C$.

• 한국식물병리학회지
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• 제14권6호
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• pp.725-728
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• 1998

Phytophthora crown rot of cymbidium was observed in Cheju island since June of 1996. The disease initiated at the basal portion of infected plant progressed upward to lower leaves. Soon after distinct water-soaking lesions appeared on lower leaves, the plant was wilted, blighted and died. Four orchid farms at Sogwipo out of 16 surveyed in the island were infected by the disease estimating 5~20% infection rates. The causal fungus was identified as P. palmivora based on following distinguishing characteristics. All isolates were heterothallic as A1 types and readily produced chlamydospores with cultural age. Sporangia were conspicuous papillate, ellipsoidal to ovoid, highly deciduous with short pedicels ca. 3~4 ${\mu}{\textrm}{m}$. Koch's rules were satisfied by a pathogenicity test and re-isolation of the fungus from inoculated plants. The pathogen has never been reported in Cheju island previously and its firstly recorded as the cause of Phytophthora crown rot of cymbidium in Korea.

• 대한치과보철학회지
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• 제60권1호
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• pp.29-36
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• 2022

상악 무치악 환자의 구강 회복을 계획할 때 치료 방법으로 임플란트를 이용한 고정성 보철 수복과 총의치 수복 또는 임플란트를 이용한 오버덴쳐 등을 고려할 수 있다. 총의치 수복의 경우 추가적인 수술이 필요 없고 상대적으로 경제적이며 임플란트 지지 고정성 보철 수복의 경우 일반적으로 총의치 수복에 비해 기능적인 부분이 우수하지만 임상적으로 임플란트 식립이 어려운 경우가 존재한다. 최근에는 환자의 요구 및 잔존 치조골의 상태 등을 고려하여 부분적으로 임플란트를 식립한 후 임플란트 지지 서베이드 크라운을 이용한 가철성 국소의치 수복도 시도되고 있다. 본 증례는 상악 전방부의 임플란트 지지 서베이드 크라운을 이용한 가철성 국소의치 수복을 시행한 증례로 심미 및 기능적으로 만족할 만한 결과를 보여 보고하는 바이다.