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The Effect of Calcium Sulfate on the Periodontal Healing of 2-Wall Intrabony Defects in Dogs (성견의 2면 골내낭에 Calcium Sulfate 이식이 치주조직 치유에 미치는 영향)

  • Choi, Dong-Hoon;Choi, Seong-Ho;Cho, Kyoo-Sung;Chai, Jung-Kiu;Kim, Chong-Kwan;Moon, Ik-Sang
    • Journal of Periodontal and Implant Science
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    • v.27 no.2
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    • pp.395-409
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    • 1997
  • 성견의 2면 골내낭에서 calcium sulfate 이식이 치조골 및 백악질 재생 능력과 접합상피의 근단이동에 미치는 영향에 대해 알아보고자 3마리 성견의 상하악 제3대구치 근심면을 연결하는 깊이 4mm, 너비 4mm의 2면 골내낭을 외과적으로 형성하고 calcium sulfate를 이식한 군을 시험군으로, 치은박리술만을 실시한 군을 대조군으로 설정하였다. 술후 8주후에 치유결과를 접합상피의 길이, 백악질 형성, 치조골 형성, 결합조직 유착으로 나누어 조직학적으로 비교 관찰하여 다음과 같은 결과를 얻었다. 1. 접합상피의 길이는 대조군에서 2.28mm, 실험군에서 0.51mm로 나타났으며, 대조군과 실험군간에 유의성 있는 차이가 있었다(p<0.05). 2. 백악질 형성은 대조군에서 1.33mm, 실험군에서 2.59mm로 나타났으며, 대조군과 실험군간에 유의성 있는 차이가 있었다(p<0.05). 3.치조골 형성은 대조군에서 1.02mm, 실험군에서 2.30mm로 나타났으며, 대조군과 실험군간에 유의성 있는 차이가 있었다(p<0.05). 4. 결합조직 유착은 대조군에서 0.50mm, 실험군에서 1.14mm로 나타났으며, 대조군과 실험군간에 유의성 있는 차이가 있었다(p<0.05). 이상의 결과를 본 실험상의 한계내에서 고려하여 볼 때, calcium sulfate는 2면 골내낭의 치주치료에 치조골 및 백악질 재생 효과가 있으며 안전하고 경제적인 골 이식재 재료로 사용될 수 있으리라 사료된다.

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참돔 노지종묘생산과 요각류 번식을 위한 적정 시비제

  • 방인철;박상용;권성민;신현웅
    • Proceedings of the Korean Aquaculture Society Conference
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    • 2003.10a
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    • pp.3-63
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    • 2003
  • 우리나라 서해안의 폐염전 또는 대하양식장을 이용한 해산어 종묘생산이 조피볼락, 감성돔, 숭어 등을 대상으로 이루어지고 있다. 이렇게 생산된 종묘는 기형개체가 전혀 없는 건강 종묘이며, 생산 원가 또한 육상수조식에 비해 최고 5배정도 낮다. 한편 참돔은 육상수조에서 종묘생산시 기형률이 비교적 높게 나타나므로 노지를 이용한 종묘생산이 요구되고 있다. 현재 노지 종묘생산시 요각류 번식을 위한 시비제로는 암모니아, 인산염, 칼륨 등이 함유되어 있는 화학비료(요소, 복합비료)나 계분, 돈분, 우분 등의 유기질 비료가 주로 사용되고 있다. 그러나 화학비료를 사용시 급격한 수질변화로 요각류의 폐사가 발생하고, 매년 지속적인 생산량을 기대하기가 어려운 문제점이 있다. 따라서 적절한 시비제를 구명하기 위하여 유기질 비료(알팔파, 숙성계분)와 화학비료(요소, 복합)를 단독 또는 병행 사용하여 2개월간의 동ㆍ식물플랑크톤의 변동량과 치어의 생존율을 조사한 결과, 유기질 비료는 부화자어가 입식된 이후에도 연속하여 시비하여도 생존율에 영향을 미치지 않았으나, 화학비료의 경우 일정 농도 이상에서는 동ㆍ식물플랑크톤의 번식에 장애를 초래하였고 이에 따라 자어가 전량 폐사하였다. 실험군의 생존율은 육상수조에서 40%, 알팔파와 숙성계분을 시비한 실험군이 15%, 요소, 복합, 알팔파를 시비한 실험군이 10%, 요소, 복합, 숙성 계분을 시비한 실험군이 8%, 요소와 복합을 시비한 실험군은 0%를 나타내었다. 또한 기형률에 있어 노지 실험군은 0.7%로 매우 낮게 나타났으나, 육상수조 실험군은 61%에 해당하는 치어가 기형이었으며, 그 형태도 다양하게 나타났다.fer, Artemia sp., copepods, 부화 25일째부터는 copepods였다. 초기성장은 부화직후 전장 1.95 mm였던 것이 10일째는 2.96 mm, 20일째는 3.89 mm, 30일째는 12.9 mm, 50일째는 35.1 mm를 나타내었다. 그러나 말쥐치 자ㆍ치어가 성장함에 따라 발생하는 지속적인 폐사와 종묘의 수송시 발생하는 폐사를 줄일 수 있는 방법이 추후에 해결되어야 할 것으로 사료된다.8,000~215,000 마리의 자어를 낳아서 개체에 따라 큰 차이를 나타내었다. 1999년에는(어미 : 전장 20.7~25.5cm, 체중 205.5~396.4g) 1 회 출산때마다 7,000~50,000 마리의 자어를 출산하였다. 3. 출산간격. 다회 출산한 쏨뱅이 어미가 첫 번째 출산에서 다음 출산까지 소요되는 기간을 조사한 결과 13일에서 25일이 걸리는 것으로 나타났다. 특히 4회 출산 한 1998년 쏨뱅이 어미는 첫 번째 출산 후 19일만에 두 번째 출산이 이루어 졌고 각각 13 일과 14 일만에 세 번째, 네 번째 출산이 이루어져 총 46일 동안 4회에 거쳐 자어를 출산하였다. 4. 출산자어의 크기. 1997년 3회 출산한 쏨뱅이의 출산시기별 자어 크기를 조사한 결과 첫 번째 출산에서는 평균전장 4.1$\pm$0.07mm의 자어를 낳았으나 두 번째 출산에서 자어의 크기는 평균전장이 3.9$\pm$0.11mm, 세 번째 3.8$\pm$0.12mm로 점차 작은 경향을 나타내었다..27mm(평균 1.76mm, n=20) 그리고 Snout length 0.74~l.67mm(평

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MRI Findings of the Repaired Anterior Cruciate Ligament (전방 십자 인대의 일차 봉합술 후 MRI 소견)

  • Kim, Jung-Man;Koh, In-Jun;Lee, Dong-Yeob;Lee, Yoon-Min
    • Journal of the Korean Arthroscopy Society
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    • v.13 no.1
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    • pp.14-21
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    • 2009
  • Purpose: To investigate MRI findings of the repaired anterior cruciate ligament (ACL). Materials and Methods: Seventeen of arthroscopic ACL primary repair with sutures pull-out technique were followed for 21.4 months (range: 12 to 60 months). Stability was assessed with physical examination and KT-1000 arthrometer (MED metric, San Diego, CA) and postoperative MRI checked with time. The patients were divided into 2 groups according to the location of tear which was defined with the location of remained synovial sleeve. Group I (11 patients) comprised that the tear was located within proximal 1/3 of ACL substance and group II (6 patients) comprised below proximal 1/3. MRI findings of the repaired ACL were evaluated by its course, sharpness, thickness and signal intensity using 3 grade system and correlated with its location of tear. Results: In all cases, Lachman test and flexion-rotation drawer test were negative, pivot-shift test was less than grade 1 and the mean side-to-side difference by use of KT-1000 arthrometer was 1.4 mm (range: -1.0 to 2.5 mm). The overall continuity of the repaired ACL was well maintained in all cases. However, mild sagging was observed in 10 cases(58.8%), mild obscure contour in 6 cases (35.3%), increased thickness in 8 cases (47.1%) and slight increased signal intensity in 5 cases (29.5%). There was no statistical significance in all parameters between 2 groups. And a focal defect at the femoral attachment site in sagittal image was observed in 7 cases (41.2%) of all patients which comprised 2 cases (18.2%) of group I and 5 cases (83.3%) of group II. It was observed more frequently in group II with statistical significance (p=0.035). Conclusion: Some abnormal MRI findings such as mild sagged course, obscure contour, increased thickness and signal intensity, the focal defect at femoral attachment site could be observed even though the stability was well maintained clinically. We thought that the focal defect was affected by the location of tear of ACL.

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Effect of Dietary Supplementation of Enzyme and Microorganism on Growth Performance, Carcass Quality, Intestinal Microflora and Feces Odor in Broiler Chickens (효소제와 미생물제제의 첨가 급여가 육계의 생산성, 도체성적, 장내 미생물 및 계분 악취에 미치는 영향)

  • Park, Cheol Ju;Sun, Sang Soo
    • Korean Journal of Poultry Science
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    • v.47 no.4
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    • pp.275-283
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    • 2020
  • This experiment was conducted to investigate the effect of the addition of enzymes and microorganisms to broiler feed on productivity, carcass characteristics, intestinal microflora, and feces odor. A total of one-hundred eighty 180 chicks (Ross 308) were randomly assigned to 5 treatments with 3 replications each having 12 birds per pen. The experimental group was divided into 0.1% EZ group (0.1% metallo-protease added to the feed), 0.2% EZ group (0.2% metallo-protease added to the feed), M group (2.0% Bacillus veleznesis CE 100 added to the feed), and MW group (2.0% Bacillus veleznesis CE 100 added to the feed and drinking water). In the results, final body weight, body weight gain, the feed conversion ratio, protein efficiency, and energy efficiency were not significantly different among all treatments in across all periods. Carcass weight, proventriculus, gizzard, heart, small intestine, cecum, and rectum weight were not significantly different among all of the treatments. However the liver weight was significantly higher in the 0.1% EZ group than in the control, M and MW groups (P< 0.05). E. coli was significantly lower in MW than in the control and M (P<0.05), and it was significantly higher in the M than 0.2% EZ and MW (P<0.05). H2S emissions in feces was not significantly different among all treatments, but NH3 emissions was were significantly higher in 0.1% EZ than in MW (P<0.05). In conclusion, the addition of 0.1% of metallo-protease was effective in the development of the liver of broilers.

LONG-TERM EVALUATION OF A $SnF_2$ GEL FOR CONTROL OF GINGIVITIS AND DECALCIFICATION IN ADOLESCENT ORTHODONTIC PATIENTS (청소년 교정환자들의 치은염 및 치아탈회 조절을 위해 사용한 겔형 불화주석($SnF_2$ gel)의 장기간 평가)

  • Boyd, Robert L.;Chun, Youn-Sic
    • The korean journal of orthodontics
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    • v.25 no.3 s.50
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    • pp.235-245
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    • 1995
  • The purpose of this paper is to review two recently reported, long-term studies of several chemical methods to control gingivitis and decalcification in adolescent orthodontic patients. The first study(gingivitis study) was designed to determine whether conventional toothbrushing and twice daily use of a brush-on 0.4 per cent $SnF_2$ gel containing more than 90 per cent available $Sn^{2+}$ would be more effective for controlling plaque accumulation and gingivitis in the presence of orthodontic appliances than conventional toothbrushing alone. The second study(decalcification study) was designed to compare the effectiveness of controlling decalcification in orthodontic patients with either a II00 ppm F tooth paste used alone, this same toothpaste and a 0.05 percent NaF rinse or this toothpaste and a 0.4 percent $SnF_2$ gel. In the gingivitis study, sixty-five consecutively treated adolescents who were to receive full-mouth fixed orthodontic appliances were assigned to two groups according to age and sex criteria. In the decalcification study an additional 30 subjects(95 total) were similarly assigned to a third group. The first group(control, n=35) used only toothbrushing with a standard fluoride(1100 ppm F) toothpaste. The second group used toothbrushing with a similar dentifrice supplemented with a 0.4 percent $SnF_2$ gel($SnF_2$ gel group, n=30) used twice daily for the entire 18-month study period. The third group(in the decalcification study only) used a similar toothpaste and 0.05 percent NaF rinse(NgF rinse group, n=30). Clinical assessments of plaque accumulation using the Plaque Index, gingival inflammation using the Gingival Index, and coronal staining were completed single-blinded before appliances were placed and 1, 3, 6, 9, 12 and 18 months after appliances were placed. Decalcification was assessed single blind on all labial surfaces of all erupted teeth before appliances were placed and 3 months after appliances were removed. The results of the gingivitis study indicated that the $SnF_2$ gel gorup had significantly lower scores for the Plaque Index(p<0.01) and Gingival Index(p<0.001) at all examinations during orthodontic treatment than did the control group. In the $SnF_2$ gel group, one subject developed mild coronal staining and two subjects developed moderate staining. In the decalcification study, when pre-treatment levels of decalcification were subtracted from post-treatment values, significantly lower decalcification scores(p<0.05) were found for both whole mouth and first molars in the NaF rinse and gel groups as compared with the control gorup(toothpaste alone). Although the gel group consistently had less decalcification than the rinse group, this difference only approached statistical significance.

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CANCER OF THE NASAL FOSSAE (비강 및 부비동암)

  • Seel David J.;Yoo Bong-Ok;Park Yoon-Kyu
    • Korean Journal of Head & Neck Oncology
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    • v.2 no.1
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    • pp.13-22
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    • 1986
  • Nasal fossae 의 암이란 비강과 부비동들에서 발생하는 것으로서 환자를 가장 괴롭히며 또한 가장 믿을수 없는 악성종양들중의 하나이다. 비록 본 예수병원 암환자 등록부에 의하면 전 암환자의 2.2% 발생빈도로서 주요한 발생빈도를 보이지는 않지만, 이 부위의 암을 치유하는데는 세심하고 철저한 모든 진단적 검사와 과감한 외과 및 치료방사선의 병합치료가 요구된다. 저자들은 지난 22 년간 비강 및 부비동 (Nasal fossae) 에서 발생한 원발성 악성종양중 치유목적의 근치수술을 시행한 68 예를 임상고찰 하였다. 근치수술을 시행했던 68 예중 91% 에서 제 3 병기 또는 4 병기의 진행된 경우 이었다. 외과적 수술은 한예의 사골동 (篩骨洞) 종양적출술 및 부분상악동(上顎洞)절제술 한 예를 제외한 66 예 모두에서 전상악동(全上顎洞)절제술 (total maxillectomy) 또는 확장 전상악동(全上顎洞)절제술 (extended total maxillectomy) 을 시 하였다. 저자들은 역학적(疫學的), 병리학적(病理學的), 병기(病期) 및 치료, 재발율과 생존율들을 분석 고찰하였으며 3가지 치료형태를 서로 비교하였다. 즉 수술만 시행한 군, 수술전 방사선 치료 및 수술병합군, 수술과 수술후 방사선치료 병합 군으로 나눴다. 저자들의 예비적 (preliminary) 관찰 결과는 2 년간 무병생존율 (disease-free 2-year survival) 만을 볼때, 수술만 시행한 군에서 40%로써 통계학적으로는 가장 좋았으나 실제는 수술만 시행한 군에서는 단지 40%만이 제 4 병기(病期)의 진행된 경우였으나 수술전 방사선치료 또는 수술후 방사선치료등의 병합치료에서는 제 4 병기(病期)의 진행된 상태가 무려 60 %나 되었다. 전체적인 재발율 (Overall recurrence rate) 은 68.2%로써 무서울 정도로 높았으며 전체적인 2 년 무병율은 23.7%였다. 저자들은 이 분야에서 실패의 원인분석과 치료방법의 선택등에 대한 지침을 제시하고저 한다.

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Three dimensional analysis of tooth movement using different sizes of NiTi wire on NiTi scissors-bite corrector (NiTi scissors-bite corrector의 와이어 굵기에 따른 3차원적 치아 이동 양상)

  • Jeon, Hyun-Ju;Park, Sun-Hyung;Jung, Sang-Hyuk;Chun, Youn-Sic
    • The korean journal of orthodontics
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    • v.39 no.1
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    • pp.43-53
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    • 2009
  • Objective: The purpose of this study was to compare the difference in three dimensional tooth movement using three different wire sizes($0.018{\times}0.025-in,\;0.016{\times}0.022-in$ 0.016-in) on a NiTi scissors-bite corrector. Methods: Computed tomography(CT) images of the experimental model before and after tooth movement were taken and reconstructed into three dimensional models for superimposition. The direction and the amount of tooth movement were measured and analyzed statistically. Results: The lingual and intrusive movements of the crown of the maxillary second molar were increased as the size of the NiTi wire increased. The roots of the maxillary second metals moved buccally except for the 0.016-in group. The intrusive movement of the roots of the maxillary second molars was increased as the size of the NiTi wire increased. Due to the use of orthodontic mini-implants, anchorage loss was under 0.2 mm on average. Conclusions: The $0.018{\times}0.025-in$ NiTi wire was most effective in lingual and intrusive movement of the maxillary second molar which was in scissors-bite position. Indirect skeletal anchorage with a single orthodontic mini-implant was rigid enough to prevent anchorage loss.

THE EFFECT OF SEALING PROCEDURE USING ALL-IN-ONE ADHESIVE ON MICROLEAKAGE OF PIT AND FISSURE SEALANT (All-in-one adhesive를 이용한 치면열구전색술식이 전색재의 미세누출에 미치는 영향에 대한 연구)

  • Yoon, Hee-Hun;Lee, Jae-Cheon;Kim, Jjung-Wook;Kim, Chong-Chul;Hahn, Se-Hyun;Lee, Sang-Hoon
    • Journal of the korean academy of Pediatric Dentistry
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    • v.31 no.3
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    • pp.486-494
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    • 2004
  • The purpose of this study was to examine differences in microleakage of enamel-sealant interface when all-in-one adhesives were used compared with conventional acid etching and single-bottle adhesive system. Seventy-five extracted permanent third molars were randomly divided into 5 groups and treated with only Etching, $Adper^{TM}\;Single\;Bond^{TM}\;Adper^{TM}\;Prompt^{TM}$ L-Pop, AQ-bond and One-up Bond F each. After sealant application, the samples were thermocycled and the degree of microleakage was determined. The results were as follows : 1. Group 3, 4, 5 using the all-in-one adhesive system showed significantly higher microleakage score than Group 1(p<0.05). 2. The lowest mean microleakage score was Group 2(0.41) followed by Group 1(1.05) Group 3(1.65), Group 4(2.85) and Group 5(3.05). 3. Among Groups using all-in-one adhesives, Group 3 showed significantly lower mean microleakage score than the other groups(p<0.05) but showed significantly higher mean score than both Group 1 and Group 2(p<0.05). 4. There was no statistically significant difference(p>0.05) between Group 4 and Group 5. 5. In SEM examination, all the groups used all-in-one adhesive showed shorter resin tags than Group 1.

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