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가토 두개골 결손부에서 베타-삼칼슘 인산염 이식 시 혈소판 풍부 섬유소와 혈소판 풍부 혈장의 골형성능에 관한 연구
박정균,주현중,이의석,장현석,임재석,권종진,Park, Jeong-Kyun,Joo, Hyun-Jung,Lee, Ei-Seok,Jang, Hyon-Seok,Lim, Jae-Seok,Kwon, Jong-Jin 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.1
Purpose: Addition of platelet-rich plasma (PRP) and platelet-rich fibrin (PRF) to grafting material has become widely accepted additively for bone regeneration because it can raise high expectations on it's clinical potential. The aim of this study was to evaluate the efficacy of PRP and PRF on early bone regeneration of rabbits when used in combination with beta tricalcium phosphate. Methods: In eight rabbits, the calvarium was exposed and the two marrows were penetrated. After then these artificial bone defects were augmented with ${\beta}$-TCP or ${\beta}$-TCP with PRP or ${\beta}$-TCP with PRF and covered. The animals were sacrificed after four and eight weeks. Histologic findings were observed under the light-microscope and histomorphometric analysis was performed by measuring calcified area of new bone formation within the CSD. Results: They demonstrated that new bone formation tended to be produced along the outline of graft materials. More amounts of newly bone was regenerated in ${\beta}$-TCP only and in combination of${\beta}$-TCP with PRF and it was statistically significant. In contrast, there was no significant difference between nothing apply and ${\beta}$-TCP with PRP groups in the relative amounts of newly mineralized bone. Conclusion: Within the limitation of this study, it can be concluded that PRF in combination with ${\beta}$-TCP showed a positive effect on bone regeneration and statistically it was significant.
초음파 가습기의 사용이 아파트의 겨울철 실내 상대습도 변화에 미치는 영향
박정균(Jung-Kyun Park) 한국환경관리학회 2007 環境管理學會誌 Vol.13 No.1
초음파 가습기는 상대습도가 낮은 겨울철 아파트 실내공기환경을 조절하는 중요한 장치이다. 실내 상대습도의 조절은 재실자의 겨울철 호흡기계 건강을 관리하는데 있어 필수적인 요소이기 때문이다. 초음파 가습기의 분무량은 종류에 따라 차이가 있으나 대체적으로 소형의 경우 시간당 0.15ℓ정도의 물을 소모하며 일반형의 경우는 시간당 0.5ℓ 정도이다. 따라서 겨울철 실내 상대습도를 적절하게 유지하게 위해서는 사용하는 가습기의 분무용량을 살펴 이것이 현재 실내의 규모에 적정한 것인지 여부를 살피는 것이 필요하다. 초음파 가습기가 실내 상대습도의 조절을 위해 얼마나 효율적으로 사용되는지를 알아보기 위하여 32평형과 51평형의 아파트를 대상으로 상대습도를 실측하여 평가한 결과 가습기를 사용하지 않을 경우 모든 측정 점에서 실내 적정습도의 하한선인 40%에 미치지 못하였으나 가습기를 사용할 경우, 51평형의 일부 침실에서 상대습도가 적정수준에 미달하였을 뿐 그 외에 모든 측정치에서는 적정한 수준을 유지하는 것으로 나타났다. Ultrasonic humidifier is a device which adjust the air conditions of the indoors of apartment buildings during wintertime when the relative humidity are low. Adjustment of relative humidity in indoors is the necessary component of taking good care of respiratory system during the wintertime. Ultrasonic humidifier uses up less energy, and it generates and releases great amount of water sprayed in to the air. The amount of water being sprayed is differed by the types of every ultrasonic humidifier, but normally it sprays about 0.15ℓ of water per hour if it's a small-sized one. If it's a average-sized ultrasonic humidifier, it will normally release about 0.5ℓ every hour. Therefore, in order to keep the constant relative humidity of indoors of the buildings at a suitable level, check the amount of water which the ultrasonic humidifier releases to determine whether the ultrasonic humidifier one's using is appropriate for the size of the room. In order to determine the effects of ultrasonic humidifier on relative humidity and the efficiency of it, I measured the level of relative humidity in the air based on 32 pyong type and 51 pyong type of apartment buildings during this research. The results of the investigation was even lower than 40% which is the lowest limit of relative humidity when the ultrasonic humidifier has not been used. When the ultrasonic humidifier has been used, only part of bedrooms in 50 pyong type of apartment's level of relative humidity was slightly lower than the right level, but it had been proved that all the other parts of an apartment's level of humidity was at an average level.
아파트 각 실별 이산화탄소(CO₂) 농도의 시계열적 변화와 환기실태의 비교
이병수(Byung-Su Lee),박정균(Jung-Kyun Park) 한국환경관리학회 2006 環境管理學會誌 Vol.12 No.1
실내 공기오염도의 지표로 사용되는 이산화탄소(CO₂)의 농도를 공동주택(아파트)에서 환기 횟수에 따라 시계열적으로 측정하였다. 하루에 한 번도 인위적인 환기 없이 각 실별 문을 폐쇄하고 생활하는 상태에서 공동주택의 실내 CO₂ 농도는 평균 1354 ppm으로 750~2250 ppm의 농도범위를 나타내었고, 각 실별 문을 개방하고 생활하는 상태에서는 평균 1465 ppm으로 1300~1740 ppm의 농도범위를 나타내었다. 1~4번의 환기 횟수에 따라 CO₂ 농도는 16.5~41.8% 정도가 감소되어졌다. 동계 공동주택의 실내공기를 효율적으로 관리하기 위해서는 1일 2회, 오전과 취침 전에 환기를 실시하는 것이 바람직할 것으로 판단된다. Carbon dioxide(CO₂) concentration at apartment rooms was measured to see the ventilation effect according to ventilation frequency. CO₂ concentration at apartment rooms with no ventilation in a day and living usually each room's door closed was evaluated to 1354 ppm in average with 750~2250 ppm range. In case with no ventilation in a day and living usually each room's door opened was evaluated to 1465 ppm in average with 1300~1740 ppm range. After 1~4 times ventilation, CO₂ concentration was decreased about 16.5~41.8%. This study propose two times ventilation at morning and before sleeping for the indoor air quality and health.
김중민(Joong-Min Kim),장현석(Hyon-Seok Jang),임재석(Jae-Suk Rim),전상호(Sang-Ho Jun),박정균(Jung-Kyun Park),주현중(Hyun-Joong Ju),이의석(Eui-Seok Lee) 대한구강악안면외과학회 2011 대한구강악안면외과학회지 Vol.37 No.1
A calcifying epithelial odontogenic tumor (CEOT) was first described as a separate entity in 1955 by Pindborg, and has since been referred to as Pindborg tumor. CEOT is characterized by the presence of squamous-cell proliferation, calcification and amyloid deposits, and accounts for only 1% of all odontogenic tumors. CEOT is a benign, though occasional locally invasive, slow-growing neoplasm. It is located either intraosseously or extraosseously, and is usually associated with an unerupted permanent tooth. A 24 year-old female visited our clinic, presenting with a palatal swelling and intra-oral ulcer. After an incisional biopsy, the lesion was confirmed to be odontogenic tumor. A tumor resection and reconstruction surgery with tongue flap were performed.