수복재료와 내가동연결장치가 IMZ 임프란트 보철물의 충격흡수효과에 미치는 영향

이수정,정찬목,전영찬,Lee, Su-Jeong,Chung, Chan-Mo,Jeon, Young-Chan 대한치과보철학회 1997 대한치과보철학회지 Vol.35 No.1

The purpose of this study was to evaluate the shock absorbing effect of 4 restorative materials and intramobile connector. The damping effect of four restorative materials used to veneer test crown rigidly connected to IMZ implant and subjected to an impact force was measured. These materials included a gold alloy(stabilor G) : a noble metal ceramic alloy(Degudent H) : porcelain(Duceram) : composite resin(Dentacolor). In addition, this study compared damping effect of same restoretive materials after using polyoxymethylene intramobile connector(POM IMC). The result of this study suggest that : In case of using metal IMC 1. Veneered composite resin(group IV) reduced the impact force by 75%, when compared to an equivalent thickness of porcelain(group III). Group IV reduced the impact force by 87% and 89%, respectively, when compared to Stabilor G(group I) and Degudent H(group II). 2. The impact force recorded was higher for the alloy with the higher elastic modulus.(Stabilor G, group I, Young's modulus 107 Gpa, versus Degudent H, Group II, Young's modulus 95 Gpa) 3. It took the longest time for composite resin veneered group(IV) to reach to peak force when compared group I, II, III. In case of using POM IMC 4. The mean impact force recorded were reduced by 79%(group I), 78%(group II), 69%(group III), 84%(group IV), respectively, when compared to using metal IMC. 5. The time required to reach the peak force were increased by 78%(group I, II) 87%(group III), 34%(group IV), respectively, when compared to using metal IMC>.

활막육종

김재도,윤영민,손정환,홍영기,손영찬,박정호,Kim, Jae-Do,Yoon, Young-Min,Son, Jeong-Whan,Hong, Young-Gi,Son, Young-Chan,Park, Jeong-Ho 대한근골격종양학회 1996 대한골관절종양학회지 Vol.2 No.1

Synovial sarcoma is an uncommon malignant soft tissue tumor which usually occurs in young-aged person, and frequently involves the lower extremities. Many authors recommended wide excision, adjuvant chemotherapy and radiation therapy. The proposed factors that affect the prognosis are age, size of tumor, site of tumor in the body, depth of tumor, histologic grade and method of treatment. The purpose of the study is to analyze the factors that affect the 5-year survival rate. We retrospectively evaluated 19 cases of synovial sarcoma treated in the Kosin University Medical Center from Jan. 1982 to Dec. 1994. The overall 5-year survival rate was 47.6% and the 5-year survival rates were significantly higher(P<0.05) in the group with smaller size of mass. The significantly lower 5-year survival rates were observed in the patient with deeply located lesion and with higher histologic grade. The 5-year survival rates were higher in the patients treated with wide excision than in the patients treated with amputation. But there was no significant difference between these groups. The adjuvant chemotherapy and radiotherapy were performed. In conclusion, we suggest that the better prognosis will be observed in the patients with smaller size of tumor mass, superficially located and lower histologic grade.

재활의학과적 검사 결과가 임상증상과 차이를 보인 잠수병 환자

심영주,정호중,김기찬 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.2

Decompression sickness is divided into 2 types based on clinical symptoms and severity. Type I decompression sickness involves usually the musculoskeletal system and cardiopulmonary system. Type II decompression sickness involves commonly the central nervous system. We experienced a case of type II decompression sickness involving cervical spinal cord. The patient showed hypesthesia below C5 dermatome and quadriplegia. But the whole spinal magnetic resonance image revealed high signal of the spinal cord below T2 levels and electrodiagnostic study showed thoracic cord level lesion. In decompression sickness, diagnosis of injured spinal cord levels is very delicate problem because in some cases clinical symptoms can be unmatched with magnetic resonance findings and electrodiagnostic study. In this kind of case there are little studies of diagnostic tools and prognostic factors. Therefore, focusing on clinical symptoms need to help more proper treatment and provide better prognosis to decompression sickness patients

금 합금 보철물의 교합면 삭제로 인한 임플란트-골 계면으로의 열전달에 관한 연구

조재영,강선녀,정창모,윤미정,허중보,전영찬 대한치과보철학회 2012 대한치과보철학회지 Vol.50 No.1

연구 목적: 임플란트-골 계면에서 발생하는 과도한 열은 골유착을 저해하여 임플란트의 실패를 유발한다. 이에 이번 연구에서는 임플란트 금 합금 보철물의 교합면 삭제시 임플란트-골 계면으로의 열전달 양상과 냉각 방식의 효율성을 알아 보고자 하였다. 연구 재료 및 방법: 온도 감지 장치 제작을 위하여 Internal cone 연결형태의 임플란트에 16개의K형 열전대를 부착하여 아크릴릭 레진에 포매하였다. 치과용 금 합금과 주조용 abutment를 사용하여 교합면에 3개의 요철을 가지는 시편을 10개 제작하였고, 연결 나사를 이용하여 임플란트와 연결한 뒤 온도 감지 장치를 37℃로 유지되는 수조에 위치시켰다. 저속 핸드피스와 green stone bur를 이용하여 30초 동안 보철물의 요철을 삭제하였는데, 무냉각군, 공기 냉각 군, 물 분사 냉각 군으로 나누어 요철을 삭제하였다. 보철물이 삭제 되는 동안 임플란트의 부위별로 온도가 0.05초 간격으로 기록되었고, 삭제를 멈춘 뒤에도 무 냉각 군의 경우 임계 온도인 47℃ 이하로 온도가 하강할 때까지, 공기 냉각군과 물 분사 냉각군의 경우 삭제 중단 후 30초 동안 추가로 온도를 기록하였다. 냉각 방식에 따른 임플란트-골 계면의 온도를 알아보고, 임플란트의 부위별 온도변화의 유의차를 알아보기 위하여 one-way ANOVA를 실시하였고, Turkey HSD 이용하여 95% 유의수준에서 사후 검증하였다. 결과: 무 냉각 군은 임플란트-골 계면의 온도가 47℃ 이상으로 상승하였으며, 임플란트의 경부에서 유의하게 높은 열이 측정되었다(P>.05). 공기냉각군과 물분사 냉각군은 임플란트-골 계면의 온도가 47℃ 이하로 유지되었다. 무 냉각 군에서 임플란트 경부의 온도가 47℃에 도달되는 데는 약 10.8 ± 1.5초가 소요되었다. 공기 냉각 군과 물 분사 냉각 군 사이에서는 임플란트-골 계면 온도의 유의차가 없었다(P>.05) 결론: 이상의 결과로부터 임플란트 금 합금 보철물의 교합면 삭제 시, 임플란트 주위 조직에 위해를 가할 수 있는 임계 온도 이상의 열이 발생했음을 알 수 있었으며, 냉각방식은 공기 냉각과 물 분사 냉각 모두 효과적이라고 생각된다. PURPOSE. The purpose of this study was to analyze temperature change along the implant-bone interface induced by grinding the occlusal surface of implant gold prosthesis and to compare the temperature generated by grinding of prosthesis with different cooling methods. MATERIALS AND METHODS. The experimental gold prostheses were fabricated with dental gold alloy and castable abutment. The prostheses had 3 cylindrical protrusions on the occlusal surface with 1mm in height. Temperature was measured using 16 thermocouple wires attached to the implant fixture surface and the fixture was embedded in an acrylic resin block inside the 37℃ water bath. Cylinders were grinded for a period of 30 second with a low-speed handpiece with green stone point. One cylindrical protrusion was grinded without cooling, the second one was grinded with air blow, and the third one was grinded with water-spray. RESULTS. The mean maximum temperature was measured more than 47℃ of the implant and the maximum temperature was measured at the cervical portion of the implant in the group without cooling. There was statistically significant difference between the group without cooling and the groups with cooling (P<.05). However, there was no significant difference at all portion of implant in the groups with cooling (P>.05). CONCLUSION. The results of this study support that the grinding of implant gold prosthesis without cooling may damage the peri-implant tissue. The continuous use of air blow and water-spray adjacent to prosthesis during the grinding of implant gold prosthesis may prove to be beneficial for cooling of the implant.

소설가 소설의 존재방식 : 김수경의 "??유죵"을 중심으로

정찬영 釜山大學校 1996 人文論叢 Vol.49 No.1

금피복된 임플란트 보철용 유지나사의 예비하중 및 풀림회전력에 관한 연구

정창모,황희성,전영찬,최설희 大韓齒科器材學會 2000 대한치과재료학회지 Vol.27 No.3

The purpose of this study was to compare the preload and the removal torque produced when using gold coated prosthetic retaining screws (Gold-Tite retaining screws) and non-coated screws(gold screws) repeatedly and to evaluate effects of a thin pure gold coating on screw stability. Following connection of the conical abutment to implant fixture using 20 Ncm of torque applied by a torque gauge, fastened the strain-gauged gold cylinder to conical abutment with gold screw, Gold-Tite retaining screw using 10Ncm. Then, preloads and removal torques were measured, screws tightened and loosened 8 times repeatedly. All experiments were performed under dry and wet condition. The results obtained were summarized as follows : 1. For gold screw group, no significant differences existed in the preload and the removal torque according to trials in both conditions(p>0.05). 2. For Gold-Tite retaining screw group, no significant differences existed in the preload according to trials in both conditions(p>0.05). However, the removal torque decreased at the second trial and incresed, after then(p<0.05). 3. In comparison of preloads according to trials, the preload in dry condition was greater than in wet condition only for Gold-Tite retaining screw group after the fourth trial(p<0.05). However, no significant differences were found between gold screw group and Gold-Tite retaining screw group(p>0.05). 4. In comparison of removal torque according to trials, the removal torque of gold screw group was greater than of Gold-Tite retaining screw group in dry condition at the second, third trial(p<0.05). At the other trials, no significant differences were found among the experimental groups(p>0.05).

Continuous Wave of Condensation Technique으로 근관충전시 치근면 온도상승 분석

김영주,황윤찬,김선호,황인남,최보영,정영진,정우남,오원만 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.4

This study was conducted to evaluate the temperature rise on the root surface while the root canal is being obturated using continuous wave of condensation technique. Maxillary central incisor was prepared for repeated canal obturation. Ten thermocouples (Omega Engineering Inc., Stanford, USA) were placed at 1mm increment from the anatomical root apex. The real temperature of Buchanan plugger was recorded before insertion into the root canal. The root canal was obturated with continuous wave of condensation technique as described by Buchanan and the root surface temperature was recorded during obturation at 150℃, 200℃, 250℃ and 300℃ temperature settings of System B HeatSource (Model 1005, Analytic technologies, Redmond, WA, USA). After completion of the temperature recording, the dentinal-cementum thickness at each sites was measured. The data were analyzed using one-way ANOVA followed by Scheffe's test and linear regression test. The results were as follows. 1. When the temperature was set at 150℃, 200℃, 250℃ and 300℃ on the digital display of System B HeatSource, the real temperature of the plugger at the 1mm point from the tip revealed 130.82±2.96℃ 158.00±5.26℃, 215.93±6.91℃ and 249.88±3.65℃ respectively. 2. The position of 8 mm from the anatomical apex showed the highest temperature increase at each temperature settings and it was significantly higher than those of other positions (p<0.01). The temperature rise was constantly increased toward coronal portion from apex of the root. 3. The maximum temperature increase on the root surface was 2.37±0.09℃ at 150℃ setting, 3.11±0.12℃ at 200℃ setting, 3.93±0.09℃ at 250℃ setting and 5.69±0.15℃ at 300℃ setting respectively. These results suggest that it be relatively kind to the supporting tissues of the root that the root canal is obturated using continuous wave of condensation technique at 150℃, 200℃, 250℃ and 300℃ temperature settings on digital temperature display of System B HeatSource.

해안서식 어패류 중 유해중금속 함량에 관한 연구 (Ⅰ)

유영찬,정진일,박유신,이종숙,인상환,최동기,김동우 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-

분편 인플루엔자백신(split influenza vaccine)의 임상효과 및 면역원성에 관한 연구

우흥정,김동림,정희진,천병철,이주연,안정배,김지희,박찬,신영규,김우주,김민자,박승철 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.1

목적 : 아단위 인플루엔자 백신 접종 후 백신의 인플루엔자 예방효과, 인플루엔자 방어 항체형성, 인플루엔자 백신의 안전성을 조사하고자 하였다. 방법 : 총 571명을 대상으로 인플루엔자 백신 접종을 하였고, 이들 접종자에서 인플루엔자 양질환의 이환을 조사하여 인플루엔자 백신의 인플루엔자예방효과를 알아보았고, 백신의 접종 전 및 접종 4주 후 혈청에서 혈구응집억제물(Hemagglutination Inhibition : HAI) 항체 검사를 실시하여 백신의 방어항체생성을 조사하였고, 백신의 안전성을 알아보기 위해 백신접종 후 1주일 이내의 부작용을 조사하였다. 결과 :백신 접종군과 백신 비접종군에서 인플루엔자 양 질환의 이환을 조사한 결과 접종군 28.35%, 비접종군 35.88%으로 나왔으며, p 값이 0.001로 통계적으로 접종군에서 유의하게 낮았고, 인플루엔자 양 질환의 예방 효과는 20.97%를 보였다. 백신의 방어항체 형성의 평가를 위해 유럽의 인플루엔자 백신 허가 기준을 조사하였는데 B/Guangdong/5/94균주의 백신접종 후 항체가 40이상의 비율을 제외한 다른 기준은 모두 만족 시켰다. 부작용은 전체 조사자 521명중 149명(29%)으로 주로 접종 부위의 국소 부작용을 호소했고, 전신 부작용은 2% 내외였으며 특별히 심각한 부작용은 발견되지 않았다. 결론 : 분편 인플루엔자 백신은 인플루엔자양질환의 예방과 방어항체생성에 효과 있으며 안전한 것으로 사료된다. Background : The safety and effectiveness of influenza vaccine are well known in developed country. The influenza vaccination has been recommended as one of the tentative immunization schedule for indicated persons since 1997 in Korea. But there are still no available data about them, even though nearly 5 million doses of influenza vaccine were used in 1997-1998 season. So it is immediately needed to investigate the safety. efficacy and immunogenicity of influenza vaccine among Korean. Methods : We studied the clinical efficacy of influenza vaccine by monitoring Occurrence of influenza-like illness in influenza risk group(vaccination ; 300, non-vaccination; 215) from December in 1997 to March in 1998. We used the split quadrivalent influenza vaccine containing 15 microgram of hemagglutinin of A/Beijing/262/95(HlNl), A/Wuhan/359/95(H3N2), B/Mie/1/93 and B/Guangdong/5/94. Hemagglutination inhibition(HA1) antibody titers were determined before immunization and 1 months after vaccination And we evaluated adverse effect of influenza vaccination at 7 days after vaccination. Results : Influenza vaccination was associated with si@icant reductions in influenza-like spptoms(vaccination group; 28.35%, non-vaccination group, 35.88%, p=0.001). The preventive effect of influenza-like i3lne.s among influenza risk goup was 20.97%. And immunogenicity of influenza A and B exceeded all of the European licensure criteria for immunogenicity except postvaccination proportion of titers 240 of B/Guangdong/5/94 strain. And the adverse effects were mainly local injection site problem and no serious adverse effect was noted. Conclusion : Split influenza vaccine is safe, inmunogenic and eff'tive in influenza risk group in Korea.

광주전남지역 정상신생아의 상부 구순 계측치와 형태에 대한 연구

조안영,양정열,이승찬,천지선 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.1

Background and objectives : The face is the one of the most variable parts of the body and characterized not only by separated part but also by interrelation of the parts. Especially, in the case of bilateral cleft lip and palate, compared with unilateral case, it is necessary to establish the facial anthropometry in newborns, because of current trend of early intervention, such as fetal surgery, lip adhesion, and nasoalveolar molding device. Millard presented the concept of rotation advancement for unilateral cleft lip repair, and, thesedays, this method of cleft lip closure is acknowledged as the most optimal principle. However, it can produce a scar that crosses the upper one third of the philtrum obliquely. The purpose of this study is to determine the configuration of the vermillion tubercle, the Cupid's bow, and the philtrum, and to suppose that which anthropometric data and proportional index could be significant to determine the configulation of the philtrum in case of bilateral cleft lip and other deformity, which can't identify the philtral shape. Materials and Methods : 74 newborn infants, who were full-term normal infant In Gwangju-Jeonnam area were examined from April to June 2003. Mean gestational ages were 39 weeks. Mean birth weight was 3.3 Kg. Five anthropometric data, which were base of columella to tubercle, nasal base to Cupid's bow peak, Cupid's bow to commissure, philtrum, peak to peak, and mouth width were measured. And the proportional indexes of each data were evaluated. Morphologic parameter, which were the shape of vermillion tubercle, the Cupid's bow, the philtrum, were analized. Results : Mean values of five anthropometric data were 14.1±2.2, 10.5±2.7, 16.5±2.5, 6.9±1.8, and 26.7±4.9 each. And the one of these, Philtral width, peak to peak, and 7 proportional indexes which were ①/④, ②/④, ③/④, ⑤/④, ④/③, ④/②, ④/① have a significance according to 3 types of the philtral shape. The most common shape of vermillion tubercle is protrusion type (89.2%), and that of Cupid's bow is normal type (52.7) and that of philtrum is parallel from nostril base to vermilion border (70.7%). Conclusion : My study supplies the plastic surgeon and others with specialized interests in the craniofacial surgical area with fundamental normative population data that will help them decide what IS abnormal. And corrective surgery of the face and cranium is becoming so precise that the techniques and data detailed in this paper are essential to its further development.