상아질과 복합레진 접착부의 피로파괴에 관한 실험적 연구

이지연,김재곤,차경,백병주 大韓小兒齒科學會 1995 大韓小兒齒科學會誌 Vol.22 No.2

The purpose of this study was to investigated and evaluate the tensile bond strengths and fatigue fracture characteristics of four dentin adhesive systems to dentin surface. 99 extracted human teeth were randomly assigned to four groups, and exposed dentin surfaces treated with four dentin bonding agents. Resin composite was bonded to dentin by use of commercial adhesive systems. Thensile bond strengths were determined in an Instron universal testing machine at a crosshead speed of 1mm/min. and the fatigue characteristics were measured by the fatigue characteristics were measured by the Fatigue testing machine(Electro-dynamic type). Fractured dentin surfaces were examined by SEM. The following results were obtained. 1. The tensile bond strengths were 21.45MPa in All-Bond 2 group, 18.67MPa in AElite group, and 18.59MPa in Scotchbond Multi-Purpose group were higher than 10.29MPa in Gluma group(P<0.001). 2. The fatigue life of All-Bond 2, AELite and Scotchbond Multi-Purpose group were singificantly higher than Gluma group when a 24.13MPa cyclic flexure load was applied(P<0.001). 3. The fatigue life of All-Bond 2, AElite and Scotchbond Multi-Purpose group were decreased when a 39.21 or 45.25MPa cyclic flexure load was applied, but these were not showed statistically different(P>0.05). 4. In All-Bond 2, AElite and Scotchbond Multi-Purpose group, the fatigue fracture of resin/dentin interface occured within a resin-infiltrated area, but in Gluma group, at near its interface with adhesive layer.

치원성 석회화 낭종

이영수,이지연,백병주 大韓小兒齒科學會 1992 大韓小兒齒科學會誌 Vol.19 No.2

The calcifying odontogenic cyst is considered to occupy a position between a cyst and an odontogenic tumor-having some characteristics of both. The calcifying odontogenic cyst is a slow-growing commpletely benign codintion. It occured with equal frequency in the maxilla and mandible, their review of cases showed that 47% occured before 31 years of ages, and that 75% of the lesions were situated anterior to the first molar teeth. Most of the lesions are intrabony, but some occur in the soft tissue and may cause a saucering of the adjacent bone, unerupted teeth and root resorption were observed in approximately one half of the cases. The radiographic appearance in of a cystlike radiolucency containing quite distinct radiopaque foci. The microscopic picture is unique for an oral lesion and the cells above the basal layer are irregular in arrangement and surround nests or sheets of large ghost epithelial cells filled with atypical-appearing keratin. Since the calcifying odontogenic cyst has a tendency for continued growth, surgical enucleation is the treatment of choice. Recurrence occur on occasion.

CARIES-METER을 이용한 치아우식 치료법의 기준에 관한 고찰

이지연,백병주,정흥주 大韓小兒齒科學會 1992 大韓小兒齒科學會誌 Vol.19 No.1

The purpose of this study was finding of criteria for exact diagnosis of inital caries and advanced caries lesions. 57 primary molar teeth & 43 permanent first molar teeth of 75 children that visited pedodontic department of Chonbuk National University hospital were used for experiment. We compared with radiogrophic examination and suitable clinical treatment according to the extent of dental caries by using Caries Meter L. The obtained results were as folloWs. 1. Concerning of th equality rate in the primary molars and permanent teeth, the case of comparing radiographic examination and clinical treatment method in the highest reat as 98.24% in the primary molars, whereas the case of comparing Caries Meter L and clinical treatment is the highest rate as 90.7% in the permanent teeth. 2. When comparing of the measurement in Caries Meter L and radiographic examination of primary molars, the concurrent rate on extent of dental caries was 100% in the enamel, 78% in the dentin and 50% in the pulp, the Pearson Correlation was r=0.864 and there were significant difference statistically as significant level α=0.01(P<0.01). 3. When comparing of the measurement in Caries Meter L and clinical treatment method of primary molars, the concurrent rate on extent of dental caries was 100% in the enamel, 80% in the dentin and 55.6% in the pulp, the Pearson Correlation was r=0.877 and there were significant difference statistically as significant level α=0.01(P<0.01). 4. When comparing of the radiographic examination and clinical treatment method of primary molars, the concurrent rate was high as 90% in the pulp, the Pearson Correlation was r=0.982, and there were significant difference statistically as significant level α=0.01(P<0.01). 5. When comparing of the measurement in Caries Meter L and radiographic examination of permanent teeth, the concurrent rate was 78% in the enamel, 66.7% in the dentin and 100% in the pulp, the Pearson Correlation was r=0.689 and there were significant difference statistically as significant level α=0.01(P<0.01). 6. When comparing of the measurement in Caries Meter L, and clinical treatment method in the permanent teeth, the concurrent rate was 95.2% in the enamel, 85.7% in the dentin and 50% in the pulp, the Pearson Correlation was r=0.930 and there were significant difference statistically as significant level α=0.01(P<0.01). 7. When comparing of the radiographic examination and clinical treatment method in the permanent teeth, the concurrent rate was 74.1% in the enamel, 57.1% in the dentin and 50% in the pulp, the Pearson Correlation was r=0.681 and there were significant difference statistically as significant level α=0.01(P<0.01).

법랑질 형성 부전증에 대한 증례보고

이승영,백병주,이지연 大韓小兒齒科學會 1994 大韓小兒齒科學會誌 Vol.21 No.1

Amelogenesis imperfecta(AI) is defined as a genetically determined effect affecting enaml formation and may be associated with other ectodermal or systemic disorders. It is entriely an ectodermal disturbance, since the mesodermal components of the teeth are basically normal. The presentation of diverse clinical manifestations in thought to result from the heterogeneous structural and chemical defects. The anomaly occurs in the general population in the range of 1 n 14,000 to 16,000, to 1.4 in 1000, depending on the specific population studied. Classification of the AI types considers mode of inheritance and clinical manifestations. The most widely accepted classifi-cation system recognizes three major groups ; i.e., hypoplastic(thin enamel), hypocalcified (primary mineralization defect), hypomaturation(defect in enamel maturation). Delineationg speific AL types can be confusing given the phenotypical similarity of many forms and that the most recent classification lists 14 different AI types. A 8-years-old female patient with complaint of abnoraml crown shape and discoloration of maxillary anterior tooth and excessice wear of posterior dentition of both arch.came to Dept.of pedodontics, College of Dentistry, Chonbut National University for rahabilitation. The treatment depends on its severity and the demands of esthetic improvement. In this case, resin veneer crown of maxillary anteiror tooth and composite resin restoration of mandibular anterior tooth showed good esthetic result. Restoration of Mx. and Mn. 1st first molar with stainless steel crown rehabilitated the masticatory function and estabilished the vertical dimension of occlusion. But futher care is needed for estabilishment of final vertical dimension of occlusion after completion of permanent dentition.

CARIES-METER를 이용한 치아우식 치료법의 기준에 관한 고찰

이지연,정홍주,백병주 全北大學校 齒醫學硏究所 1991 전북치대논문집 Vol.9 No.1

The purpose of this study was finding of criteria for exact diagnosis of initial caries and advanced caries lesions. 57 primary molar teeth & 43 permanent first molar teeth of 75 children that visited pedodontic department of chonbuk National University hospital were used for experiment. We compared with radiographic examination and suitable clinical treatment according to the extent of dental caries by using Caries Meter L. The obtained results were as follows. l. Concerning of the equality rate in the primary molars and permanent teeth, the case of comparing radiographic examination and clinical treatment method in the highest rate as 98.24% in the primary molars, whereas the case of comparing Caries Meter L and clinical treatment is the highest rate as 90.7% in the permanent teeth. 2. When comparing of the measurement in Caries Meter L and radiographic examination of primary molars, the concurrent rate on extent of dental caries was 100% in the enamel, 78% in the dentin and 50% in the pulp, the Pearson Correlation was r=0.864 and there were significant difference statistically as significant level α=0.01(P<0.01). 3. When comparing of the measurement in Caries Meter L and clinical treatment method of primary molars, the concurrent rate on extent of dental caries was 100% in the enamel, 80% in the dentin and 55.6% in the pulp, the Pearson Correlation was r=0.877 and there were significant difference statistically as significant level α= 0.01(P<0.01). 4. When comparing of the radiographic examination and clinical treatment method of primary molars, the concurrent rate was high as 90% in the pulp, the Pearson Correlation was r=0.982 and there were significant difference statistically as significant level α= 0.01(P<0.01). 5. When comparing of the measurement in Caries Meter L and radiographic examination of permanent teeth, the concurrent rate was 78% in the enamel, 66.7% in the dentin and 100% in the pulp, the Pearson Correlation was r=0.689 and there were significant difference statistically as significant level α=0.01(P<0.01). 6. When comparing of the measurement in Caries Meter L and clinical treatment method in the permanent teeth, the concurrent rate was 95.2% in the enamel, 85.7% in the dentin and 50% in the pulp, the Pearson Correlation was r=0.930 and there were significant difference statistically as significant level α=0.01(P<0.01). 7. When comparing of the radiographic examination and clinical treatment method in the permanent teeth, the concurrent rate was 74.1% in the enamel, 57.1% in the dentin and 50% in the pulp, the Pearson Correlation was r=0.681 and there were significant difference statistically as significant level α= 0.01(P<0.01).

Pendulum 장치를 이용한 상악 대구치 후방이동에 관한 치험례

김문현,백병주,이지연 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.2

Orthodontists have long sought methods of correcting ClassⅡ malocclusions without straining the lower arch and without the need for strict patient compliance. In the 1990s, noncompliance therapies in various forms have become more prominent than ever before. The Pendulum Appliance is a hybrid that uses a large Nance acrylic button in the palate for anchorage, along with 032˝TMA springs that deliver a light, continuous force to the upper first molars without affecting the palatal button. Thus, the appliance produces a broad, swinging arc-or pendulum- of force from the midine of the palate to the upper molars. Since the Pendulum Appliance drives the upper molars distally (with slight lingual tipping) quite rapidly, there is a tendency for the anterior bite to open. This open bite generally corrects itself in brachyfacial types, especially those with tongue-thrust habits. I still recommend treating vertical growth patterns conservatively with extraction, directional headgears, and transpalatal bars. Patient tolerance of the Pendulum Appliance has been excellent; most adapt to the appliance within a week, Initial clinical findings have been encouraging. It is not unusual to see as much as 5mm of distal molar movement in three to four months.

임신시 합병된 복직근의 테스모이드 종양 1 예

이진호,김종우,이신애,이지연,이종은,이춘배,장윤주 대한산부인과학회 1998 Obstetrics & Gynecology Science Vol.41 No.9

복벽의 데스모이드 종양은 근건막 구조물에서 기원하면서 매우 드물게 발생하는 신생물이다. 비록 모든 연령대의 남성과 여성에서 발생가능하나 거의 80%가 여성에서, 특히 20대에서 40대 사이의 가임연령에서 일어난다. 전형적으로 복벽의 데스모이드 종양은 복직근에서 가장 많이 발견되고 경산부에서 임신 동안 또는 출산 후 첫 1년 동안에 흔히 발생한다고 한다. 결코 전이는 일어나지 않으나 광범위 절제술을 시행한 경우에도 재발률이 24%에 달한다. 저자들은 30세 경산부에서 임신말기에 합병된 복직근의 데스모이드 종양 1예를 경험하였기에 간단한 문헌 고찰과 함께 보고하는 바이다. Abdominal desmoid tumor is a very rart neoplasm and arises from musculoaponeurotic structures. Approximately 80% of cases occur in woman, usually between the ages of 20 and 40 years, but they have been described in both men and women of all ages. Typically, abdominal desmoid tumor occurs most commonly in the rectus abdominis muscle and in young, gravid, or parous women during gestation or, more frequently, during the first year following childbirth. The rates of recurrence following local excision of desmoid tumors have been reported to be about 24%, but metastases do not occur. We experienced one case of desmoid tumor of the rectus abdominis muscle in a 30-year old woman with pregnancy and so present it with brief review of literatures.

악성 난소 배세포종양의 임상적 고찰

이승호,이두진,이재열,이영기,이미나,이상원 대한산부인과학회 1994 Obstetrics & Gynecology Science Vol.37 No.12

영남대학교 의과대학 산부인과학교실에서는 1983년 5월부터 1992년 4월까지 만 9년동안 21예의 악성 배세포종양을 경험하여 다음과 같은 결과를 얻었다. 1. 악성 난소 배세포 종양의 빈도는 21예로 배세포 종양의 10.6%를 차지하였고, 악성 난소종양의 21.9%를 차지하였다. 2. 악성 난소 배세포 종양의 조직학적 분류에 따른 종양의 분포를 보면 내배엽동종양이 7예(33.3%)로 제일 많았으며, 미분화 배세포종과 미성숙 기형종이 각각 6예(28.6%)로 그 다음순이었고 그외 태생암과 양성 성숙기형종에서 유래한 선암이 각 1례(4.8%)씩 있었다. 3. 환자의 연령은 10세에서 73세까지 분포하였고 10대가 가장 많았으며 (57.1%) 평균 연령은 22.7세였다. 4. 임상적 병기의 분포는 I기가 13예(61.9%)로 대부분을 차지하였고 II 기가 1례(4.8%), III기가 5례 (23.8%), IV기가 2례(9.5%) 였다. 5. 발생부위는 좌측 및 우측이 각각 9례식으로 같았고 양측성이 3례 있었다. 6. 2년 생존률은 60%였으며 암기별로는 I기가 75%, II기 이상이 50%였고 조직학적 형태별로는 미분화 배세포종이 66.7%, 내배엽동종양이 33%, 태생암이 100%였다. 7. 난소의 악성 배세포 종양의 예후인자로는 조직학적 형태와 잔류종양의 크기 및 임상적 병기등이 있었다. 8. Disease-free interval 은 내배엽동 종양에서는 10개월에서 50개월이었고 미분화 배세포종에서는 37개월에서 87개월이었다. A clinical study was made on 21 cases of malignant germ cell tumors treated at the Department of Obsterics and Gyunecology in Yeungnam University Hospital between May 1983 and April 1992. The results obtained were as follows: 1. The frequency of malignant germ cell tumor among 96 cases of ovarian cancer in this period was 21.9%, By the histologic type, the endodermal sinus tumor was 7 cases (33.3%), dysgerminoma was 6 cases (28.6%), immature teratoma was 6 cases (28.6%), embryonal carcinoma was 1 case (4.8%) and adenocarcinoma arising in the benign cystic teratoma was 1 case(4.8%). 2. The mean age of the patients at presentation was 22.7 years (10-73 years). 3. The mean tumor diameter was 14.1cm (10-30cm). 4. No site predilection of development of malignant germ cell tumor was identified in this study : raght side in 9 cases (42.9%) left side in 9 cases(42.9%), and bilateral tumor in 3 cases (14.3%). 5. Main clinical symptoms were abdominal pain/discomfort(47.6%), abdominal mass (38.1%) and abdominal distention (14.3%) in order 6. Sixty-two percent (13/21) of malignant germ cell tumors was FIGO stage I at the time of initial diagnosis. 7. Eight of twenty-one patients were treated by surgery alone, 10 of 21 patients by surgery and multiple agent combination chemotherapy, 1 of 21 patients by surgery and radiotherapy and 1 of 21 patients by surgery, radiothery and chemotherapy 8. Two of twenty-one patients underwent second look operation after 9 courses of chemother : All patients had shown surgical complete remission and no patients recurred following negative second look operation. 9. Diseae-free interval was from 10 months to 50 months in EST and from 39 months to 87 months in dysgerminoma. And overall 2-year survival rate of malignant germ cell tumor was 60%. 10. Prognostic factors of malignant germ cell tumor in this study were the clinical stage, the histologic type and the size of residual tumor mass.

자궁근종의 초음파진단

이종용(JY Lee),이규인(K.I Lee),이승호(SH Lee),이태호(TH Lee) 대한산부인과학회 1982 Obstetrics & Gynecology Science Vol.25 No.6

1981년 1월 1일부터 동년 6월 30일까지 골반내종양환자중 수후 조직진으로 확인된 23예의 이미 얻어진 초음파상이 특징을 분석한 바 그 성적을 아래와 같이 요약한다. 자궁근종초음파상중 가장 흔한 것은 fill in pattern으로 23예중 21예, 91.3%에서 관찰 할 수 있었고, 이하 자궁증대상의 78.3%, 제광의사 echo상의 65.2%, 제광변형상의 30.4%의 순 이었다. 자궁근종이 outline이 명료한 것이 43.5%, nodular한 것이 30.4%, hazy한 것이 26.1%이었 다. 자궁근종이 종양부위와 건전 자궁의 경우는 불명료한 예가 65.2%로 약 2/3을 점하였 다. 종양후벽의 초음파상은 78.3%가 불명료하였다. 이상의 성적으로 미루어 자궁근종의 초음파진단상의 중요소견은 fill in pattern, 자궁증대 상 및 종양후벽상, 종양경우상이며 그 외에 자궁근종의 수형, 제광변형상 및 제광의사 echo 상도 좋은 참고가 된다고 생각된다. Retrospective analysis was made on characteristic findings of 23 cases of Uterine myoma by ultrasonograph, during Jan. 1981 to June 30 1981. The results summarized were as follows. The most frequent ultrasonographic finding encountered in 23 cases of uterine myoma was fill in pattern, 21 cases out of 23 cases or 91.3% The next frequent finding was enlarged uterine picture 78.3%, pseudoecho of bladder 65.2% and picture of bladder distoriton 30.4% in order of respectively. Outline of uterine myoma, there was pattern of clean, nodular and hazy which showed frequency of 43.5% and 26.1% respectively. Borderline between myoma node and normal uterus had 65.2%o of unclear pattern. Picture of posterior wall of uterine myoma revealed unclear pattern of 78.3%. It was concluded that important features of ultrasonographic findings for diagnosis of uterine myoma were fill in pattern, enlargement of uterus, picture of tumor posterior wall, picture of tumor borderline and other findings that of tumor outline, picture of bladder distortion, pseudo bladder echo will be a good criterias for diagnosis of uterine myoma.

[S8-3] Dietary Supplement Intake of Children

YA Jang,JJ Moon,HS Lee,HJ Lee,Y Lee,DH Kim,JY Lee,HY Lee,YJ Kang,JW Hong,HS Nam,EJ Lee,C-I Kim 한국식품영양과학회 2008 한국식품영양과학회 학술대회발표집 Vol.2008 No.10