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Hinge Axis Point에 관(關)한 실험적(實驗的) 연구(硏究)
조인호,Jo, In-Ho 대한치과보철학회 1976 대한치과보철학회지 Vol.14 No.1
Casts are often transferred to the articulator by arbitrary means, because the method of locating the true hinge axis point thought to be a complicated and time consuming procedure, and because the importance and significance of the true hinge axis in the construction of dental prosthesis is not sufficiently understood. In this report, the author constructed the hinge axis locator and determined the variations in location of the true hinge axis points from the location of the hinge axis point determined by arbitrary means. For this report, the procedure was followed on 50 persons with normal occlusion and sound T.M.J. function, so 100 true hinge axis points were recorded and compared with the arbitrary hinge axis point. The results obtained were as follows. 1. The mean distance from the arbitrary hinge axis point to the true hinge axis point was as follows. Right; (O)5.17mm., (V)3.44mm., (H)3.55mm.. Left; (O)5.63mm., (V)3.95mm., (H)3.51mm.. 2. The percentage of true hinge axis points classified at intervals of 2mm was as follows. 0-2mm; 4%, 2-4mm; 21%, 4-6mm; 37%, 6-8mm; 26%, 8-10mm; 10%, Over 10mm; 2%. And only 50% of the 100 true hinge axis points were located within a 5mm. radius of the arbitrary hinge axis point. 3. Instead of transferring the casts to the articulator by arbitrary means, the careful location of the true hinge axis points is recommended to avoid potential sources of error in mounting casts.
임신기와 수유기 동안의 모체의 식이제한이 자손 쥐의 장기 무게에 주는 영향
김혜원 ( Hye Won Kim ),이상미 ( Sangmi Lee ),이선화 ( Sun Hwa Lee ),조인호 ( In Ho Jo ),김영주 ( Young Ju Kim ) 대한산부인과학회 2012 Obstetrics & Gynecology Science Vol.55 No.11
목적 본 연구에서는 임신기와 수유기 동안의 모체의 식이제한이 3주령과 24주령 자손 쥐의 간, 비장, 폐, 뇌 무게에 주는 영향을 알아보고자 하였다. 연구방법 임신한 Sparaque-Dawley종 흰쥐를 두 군으로 나누어 임신 10일째부터 22일까지 식이전량공급 혹은 50% 식이제한을 시켰으며, 출산 후 자손 쥐들을 네 군으로 나눈 후 군에 따라 식이공급을 달리하였다: AdLib/AdLib군, 실험 전 기간 동안 제한 없이 식이공급; FR/AdLib군,임신 중에 50% 식이제한을 한 어미 쥐에게서 출생하였고 출생 후 실험 종료일까지 제한 없이 식이공급; AdLib/FR군, 임신 중에 제한 없이 식이공급을 한 어미 쥐에게서 출생하였고 출생 후 실험 종료일까지 50% 식이제한; FR/FR군, 실험 전 기간 동안 50% 식이제한을 한군으로 자손 쥐들은 3주령과 24주령 때 희생하여 간, 비장, 폐, 뇌를 적출하였고 무게를 재었다. 결과 3주령과 24주령 FR/AdLib군 자손 쥐의 간, 비장, 폐, 뇌 무게는 네 군 간의 차이가 없었다. AdLib/AdLib군(대조군)과 비교했을 때,3주령 AdLib/FR군 수컷과 암컷 자손 쥐의 간(P<0.01)과 비장(P<0.001)의 무게는 모두 감소하였으나, 24주령에서는 암컷의 간 무게(P<0.05)가 증가한 것을 제외하고는 모두 차이가 없었다. 3주령의 폐 무게는 수컷의 경우 차이가 없었으나 암컷은 대조군보다 증가하였다(P<0.05). 하지만, 24주령의 폐 무게는 수컷의 경우 증가하였고(P<0.01) 암컷은 차이가 없었다. 뇌 무게는 3주령(P<0.001)과 24주령(수컷 P<0.001, 암컷 P<0.01) 모두에서 대조군보다 증가하였다. 결론 임신기와 수유기 동안의 모체의 식이제한은 자손 쥐의 장기 무게에 영향을 줄 수 있으며, 이러한 영향은 자손 쥐의 전 생애에 걸친 질병 발생률에도 영향을 미칠 것이다. Objective We examined the effect of maternal feed restriction during gestation and lactation period on changes in liver, spleen, lung and brain weight in 3 and 24-week-old rat offspring. Methods At day 10 of gestation, rats were divided into two groups and given an ad libitum (AdLib) diet or 50% food restricted (FR) diet until delivery. Offspring were divided into four groups: AdLib/AdLib, AdLib throughout experimental period; FR/AdLib, FR during pregnancy and AdLib after delivery; AdLib/FR, AdLib during pregnancy and FR after delivery; and FR/FR, FR throughout experimental period. Offspring were killed at 3 and 24 weeks of age. Results In the FR/AdLib group, all of the organ`s weights were not differed among the four groups in the 3 and 24-week-old offspring. In the AdLib/FR group, liver (P <0.01) and spleen (P <0.001) weight were decreased in the 3-week-old offspring, but these weights were not differed in the 24-week-old offspring. In this group, male`s lung weight was not differed but female`s lung (P <0.05) weight was higher than in the control group, however, lung weight of 24-week-old male offspring was increased (P <0.01) whereas female was not differed. Brain weight of AdLib/FR group was higher in the 3 (P <0.001) and 24-week-old (P <0.001 in male, P <0.01 in female) offspring than in the control group. Conclusion Our results indicate that maternal feed restriction during critical period might impact on the normal growth and development of offspring organs and also, these effects may influence to prevalence of disease in offspring`s lifelong period.