법랑질 형성 부전증에 관한 증례 보고

박종하,김재곤,백병주,허선,이영수 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.3

본병원 소아치과에 내원한 유치와 영구치 모두에 법량질 형성 부전증을 가지고 있는 환자에 대해 교합면의 마모를 방지하여 교합고경을 유지하기 위해 유구치부 stainless steel crown 및 맹출 중인 제 1대구치에 sealant, 전치아에 걸쳐서 주기적인 불소도포를 이용해 치료하여 양호한 결과를 얻었다. Amelogenesis imperfcta is a group of hereditary defects of enamel unassociated with any other generalized defects. The prevalence of this condition has been estimated to range from l in 14.000 to l in 16.000. depending on the population sudied. It may be differentiated into three general types: hypoplastic, hypocalcified. and hypomaturation. depending on the clinical presentation of defects and the likely stage of enamel formation that is primarily affected. The dentin and root are usually normal. but the enamel may lack the normal prismatic structure, being laminated throughout its thickness or at the periphery, with the result that these teeth are more resistant to decay. This case is that of an six-year-old girl brought to the pediatric dentistry department by her parents for esthetic reasons and also because of slight dental sensitivity. Clinical and radiographic examinations confirmed amelogenesis imperfecta. The author has treated with the crowning of the primary molars, using prefomed NICr crowns and periodic and periodic fluoride application on whole dentition.

설인신경 절단이 성곽유두 미뢰에 미치는 영향

박병건,노용관,차경,김재곤,백병주 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.3

The effect of glossopharyngeal nerve transection on the taste buds of the rat vallate papilla was examined by using the method of DNA nick-end labeling (TUNEL) and standard electron microscopic technique at 1,3,5,7,9 days after denervation. In general, the number and size of taste buds decreased as more days passed after denervation. They started decreasing on day 3 post denervation. In studies using TUNEL method, TUNEL postive cells markedly increased in their numbers one day post denervation, as compared with controls. The number of apoptotic taste bud cells per taste bud profile was averaged to be 0.64 and 0.44 for day 1 and 3 post denervation, respectively, whereas it was 0.10 in controls. In electron microscopy, apoptotic cells were identified by the presence of condensed and fragmentary nuclei in a cytoplasm, which resulted in increased density. In control rats, only few apoptotic cells were found. On days 1 and 3 post denervation, nerve fibers almost disappeared from the taste buds and some apoptotic cells were apparent. On days 7 and 9 post denervation, a few taste bud cells were still present in the epithelium of the bottom of the trench wall of the vallate papilla and most of them showed apoptotic changes. The results indicate that the death of taste bud cells in normal conditions is controlled by apoptosis and the decrease and disappearance of taste buds sfter denervation is also caused by apoptosis of taste bud cells.

.Pseudomonas stutzeri 감염에 의한 맥락총염에서 초래된 포착성 측뇌실 확장 1예

김남곤,권오영,박기종,최낙천,임병훈 대한신경과학회 1997 대한신경과학회지 Vol.15 No.2

잇솔질 마모 처리한 불소방출성 수복재의 특성

박종하,백병주,김재곤,양연미 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.4

불소는 항우식 작용을 보이므로 치아의 우식예방을 고려한 진료가 이루어지면서 치면에 불화물을 도포하거나 불소 함유 구강세정액을 사용하거나 불소방출성의 수복재료를 적용하거나 하는 등의 우식억제 방법이 치과임상에서 빈번하게 적용되고 있다. 이에 본 연구는 불소 방출을 보이는 수복재료의 잇솔질 후 불소방출과 잇솔질로 인한 표면조도의 변화를 조사하기 위해 시행되었다. 7종의 불소를 방출하는 수복재료로 Fuji Ⅱ LC Improved: FL, Compoglass F: CG, Dyract AP: DR, F2000: FT, Ariston: AT, Tetric: TR, 그리고 Gradia: GD를 연구재료로 사용하였다. 불소 방출은 10,000회의 잇솔질을 시행한 후 10일 동안의 방출량을 측정하였고, 표면조도는 40,000회의 잇솔질 후 중심선평균거칠기 Ra와 최대거칠기 Ry를 측정하였으며, 마모면은 주사전자현미경으로 관찰하였다 잇솔질 후의 불소 방출량과 표면 관찰로부터 다음과 같은 결론을 얻었다. 1. 불소방출은 AT군, FL군 및 CF군의 경우에는 초기단계에 다량의 급격한 방출을 보인 후 상대적으로 낮으면서도 지속적인 방출 양상을 보였지만, 나머지 시험의 경우에는 초기단계로부터 낮으면서도 지속적인 방출을 보였다. 2. 불소방출은 약 40일 경과 후 안정적인 방출 양상을 나타냈으며, Tukey 분석 결과, AT군, 레진강화 GIC의 FL군, 콤포머군 전부 및 불소방출성 콤포짓트 레진의 GD군과 TC군 사이에서 통계학적으로 방출량의 유의한 차이를 보였다(p<0.05). 3. 표면조도는 FT군에서 가장 크고 CF군에서 가장 작은 값을 보였으며, Tukey 분석 결과, FT군, AL군 및 FL군과 TC군, DR군, GD군 및 CF군 사이에서 통계학적으로 유의한 차이를 보였다(P<0.05). The objectives of this study were to evaluate the fluoride release and the change of surface roughness of fluoride releasing restorative materials after toothbrush-dentifrice abrasion. Seven commercially available fluoride releasing restorative materials (Fuji Ⅱ LC Improved: FL, Compoglass F: CG, Dyract AP: DR, F2000: FT, Ariston: AT, Tetric: TR, and Gradia: GD) were selected as experimental materials. The results obtained were summarized as follows: 1. The AT, FL, and CF groups produce an initially large burst of fluoride release and comparatively low but continuous release of fluoride. But other groups produce no initial burst of fluoride and levels of release remain relatively constant. 2. The rate of fluoride release remains steady state after 40 days. The results of Tukey's test (P<.05), the fluoride release showed the order of decreasing rank as follows: AT > FL > compomers > TC and GD. 3. The surface roughness indicated that the highest value was observed in the FT group and the lowest value was observed in the CF group. The surface roughness of Tukey's test showed the significant differences between groups of FT, AT and FL and groups of CF, DR, GD and TC (P<0.05).

여러가지 수복물의 polishing조건에 따른 치수 온도변화

김재곤,이승영,박종하,백병주,양종숙 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.2

수복물의 연마의 중요성에 대하여 많은 연구들이 이루어져 왔으며, 이는 수복물의 금속성질의 개선, 변연적합성의 증가 그리고 치태축적의 감소 등을 이유로 시행된다. 그러나 불행하게도 수복물에 대한 연마시 열의 발생으로 인하여 치수부위에 손상을 초래하므로 열의 발생을 최소화하려는 노력이 뒤따라야 할 것이다. 이에 본 연구에서는 수복물의 연마시 회전속도의 차이, 냉각제의 적용 유무, 여러 종류의 수복물의 차이, 간헐적인 연마와 연속적인 연마의 차이 그리고 잔존 상아질의 두께의 정도에 따른 치수내부에서의 열의 변화를 알아보기 위하여 발거된 구치에 5급 와동을 형성한 후 복합레진(Z100, 3M co), resin-mod-ified GLC(Dyract, Fuji II LC), 그리고 아말감(Degussa)등으로 충전하였으며, 다양한 조건에서의 연마를 시행, 치수내부에서의 열의 변화를 측정하여 다음과 같은 결과를 얻었다. 1. Amalgam을 건조한 상태에서 연마시 다른 재료에 비해 큰 치수내 온도 상승을 보였다.(P<0.05). 그러나 Z100, Dyract, Fuji II LC간에는 간헐적 수복물 연마와 연속적인 수복물 연마 모두 어떤 경우든 유의차가 없었다.(P>0.05). 2. 같은 조건으로 연마를 시행했을 때, 간헐적인 연마보다 연속적인 연마를 한 경우가 치수내 온도가 더 크게 상승하였다.(p<0.01). 3. 아말감과 Dyract에 있어서는 잔존 상아질의 차이에 따른 치수내 온도변화에 유의한 차이를 보였으나(P<0.01), Fuji II LC에 있어서는 유의성이 없었다(P>0.01). 4. 냉각제의 유무에는 관계없이 어떤 경우든 시간에 따른 온도 상승을 보였다. 그러나, 냉각제를 사용한 경우가 냉각제를 사용하지 않은 경우에 비해 온도 상승값이 훨씬 작았다.(P<0.01) The importance of finishing and polishing the restoration has been described by several authors. The final step provides for improved metallurgical properties, better marginal adaptation, reduced plaque accumulation. Unfortunately, finishing of the restorations can produce damage from temperature rises at the pulpal wall. The aim of this study was to determine the changes in temperature can be occurred during the use of finishing and polishing instruments under a variety of conditions. ; with or without a water coolant, intermittent or continuous operation, high or low rotation speed, remaining dentin thickness, and various restorative materials. Class V preparations were cut on extracted molars and restored with composite resin(Z 100), resin-modified glass ionomer cements(Dyract, Fuji II LC), and amalgam. Finishing was done with aluminum oxide coated disc(Sof-lex polishing disc, 3M, USA). The following results were obtained. 1. The rise of temperature during polishing of amalgam restorations was the highest among the all experimental groups except polishing with water coolant(P<0.05). However, there were no statictical differences in temperature rises between Z 100, Dyract and Fuji II LC(P>0.05). 2. The intrapulpal temperature was greatly influenced by the applied time, and intermittent polishing was showed significantly lower temperature rises than continuous polishing(p<0.01). 3. The intrapulpal temperature was increased according to the application of polishing regardless of using water coolant. However, polishing with water coolant showed significantly lower temperature in the pulp than not used water coolant(P<0.01).

SFC를 이용한 프로그래머블 로직 콘트롤러 프로그래밍

오금곤,조금배,박병강 조선대학교 동력자원연구소 1993 動力資源硏究所誌 Vol.15 No.1

PLC system is used for the purpose of decentralized control and allows data transmission between programable controllers to be easily performed by using an exclusive relay area. The programming language is important to operate the system. In this paper, it is used SFC(Sequence Function Cahrt) programming language to decrease the execution time with compare the ladder diagram program method. As a result, the SFC programming language process time is faster about 20∼30(%) than the ladder diagram programming.

한국인 알코올 의존 환자에서 알코올 대사 효소 유전자형 빈도의 남녀 차이

김성곤,김철민,이덕기,황인복,이현숙,김성연,전은숙,송영상,박제민,최병무,김명정 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.2

Objectives : There are a number of preceding epidemiological studies reporting gender differences in the genetic etiology of alcohol dependence. The author investigated gender difference in the frequencies of ADH2 and ALDH2 genoypes between the patients with alcohol dependence and normal control. Methods : The subjects were 141 alcohol dependent patients (104 males, 37 females) and 138 normal control (79 males, 59 females). The frequencies of 1/1 and 1/2+2/2 (2+ afterward) genotypes for ADH2 and ALDH2 were investigated in male and female between alcohol dependence and normal control group. DNA was extracted from WBC in peripheral venous blood and PCR-RFLP method was used out for genotyping. Results : First, the frequency of ADH2 1/1 genotype was significantly higher in alcohol dependent patients than normal control in both genders. Second, while there was no gender difference in the frequency of ADH2 1/1 genotype in normal controls, in the patient group however, the frequency was significantly higher in females than males. Third, in male subjects with alcohol dependence, the frequency of ALDH2 1/1 genotype was significantly higher than in male normal control subjects. On the other hand, in female subjects with alcohol dependence, the frequency of ALDH2 2+ genotype was significantly higher than in female normal control subjects. Conclusion : These results suggest that while the risk of alcohol dependence is predominantly affected by ALDH2 1/1 geno-type in male, the female ADH2 1/1 genotype is mainly associated with the risk of alcohol dependence. This means that there are gender differences in the genetic etiology of alcohol dependence.

하악 전치부에 발생한 과잉치 : A CASE REPORT

김성희,박종하,양연미,김재곤,백병주 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.1

과잉치는 유치열에서 0.3-0.8%, 영구치열에서 1.0-3.5% 정도로 발생하며, 2:1로 남자에게 호발, 9:1로 상악에서 호발한다. 그 중 하악 전치부에서 발생하는 빈도는 전체 과잉치중에서 2-4%의 매우 낮은 빈도를 보인다고 보고되었다. 과잉치가 계속 존재할 경우 나타날 수 있는 합병증으로서 치간이개, 인접한 정상치아의 맹출장애, 치관의 형성이상, 인접치의 치근흡수, 함치성 낭종 등을 들 수 있으며, 치열 발육 중인 어린이의 경우 성장 중임을 감안하여 바람직한 교합유도를 위한 정확한 진단과 함께 적절한 처치가 필요하다. 본 증례는 전복대학교병윈 소아치과에 내원한 6세 환아의 하악 전치부에서 발견된 양측성 매복 과잉치로서 그 중 한개는 영구치와 융합된 경우를 보고하는 바이다. Supernumerary tooth describes an excess of tooth number, which are found in primary dentition with 0.3-0.8%, permanent dentition with 1.0-3.5% prevalence. Their frequency is about 2:1 (male vs female) and 9:1 (maxilla vs mandible). However, occurrence is very rare in the incisor region of the mandible. We need a early diagnosis and appropriate treatment plan because of possibility of diastema, eruption failure, displacement, rotation of the associated permanent teeth, root resorption, dentigerous cyst, with presence of the supernumerary teeth. This is a case report about two impacted supernumerary teeth found in madibular anterior region of 6 years old girl. One was extracted and another was retained because of fusion with permanent central incisor on the labial surface.

불소방출성 콤포짓트 레진계 수복재의 특성

김상훈,백병주,김재곤,양연미,박정렬 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.3

본 연구에서는 구강 환경과 유사한 조건에서 불소방출성을 보이는 콤포짓트 레진계 수복재의 내구성과 불소방출성을 조사하기 위해 4종의 콤포머와 1종의 불소방출성 콤포짓트 레진을 실험재료로 선택하고 5℃와 55℃ 수중에서의 열순환 처리 후의 인장강도, 열순환 처리 후 칫솔에 대한 작용력 1.5N으로 100,000회 칫솔질을 시행하였을 때의 표면조도 및 불소치약 칫솔질 후 37℃ 수중에서의 불소이온 용출 양상을 조사한 결과 다음과 같은 결론을 얻었다. 1. 인장강도는 TC(Tetric^(ⓡ) Ceram)군에서 32.3 MPa, CF(Compoglass F)군에서 16.8 MPa이고, TC군과 DF(Dyract^(ⓡ) flow)군 및 CF군에서 유의한 차이를 보였다(P<0.05). 2. 칫솔질 마모시험 후의 표면조도 Ra는 TC군에서 0.287, FT(F2000)군에서 1.516이고, FT군과 나머지 시험군 사이에 유의한 차이를 보였다(P<0.05). 3. 칫솔질 마모시험 후의 표면에서는 필러의 돌출과 탈락 양상이 관찰되었다. 4. 불소치약 Perio Alpine Herb로 칫솔질 한 후 콤포머는 초기에 높은 용출을 보인 후 시간이 경과하면서 용출량이 감소하는 양상을 보였지만, 불소방출성 콤포짓트 레진의 TC군에서는 초기단계부터 낮으면서도 지속적인 용출을 보였다. 5. 불소치약 Perio Alpine Herb로 칫솔질 한 후 1시간이 경과하였을 때의 불소이온 용출량은 CF군에서 2.064μg/cm², TC군에서 0.1119μg/cm²이고, CF군의 용출량이 나머지 시험군에 비해 유의하게 높은 값을 보였다(P<0.05). The objectives of this study were to examine the properties of fluoride-releasing resin composite restorative materials. Four commercially available compomer materials (Compoglass F: CF, Dyract^(ⓡ) AP: DA. Dyract^(ⓡ) flow:DF, F2000: FT) and one fluoride-releasing composite resin (Tetric^(ⓡ) Ceram: TC) were selected as experimental materials. Rectangular-shaped tensile test specimens were fabricated in a teflon mold giving 5 mm in gauge length and 2 mm in thickness. Disk-shaped specimens were fabricated in the split teflon mold with diameter of 15mm and thickness of 1 mm. After curing for an hour, specimens were immersed in deionized water at 37℃±1℃ for 30 days. All specimens were thermocycled for 10,000 cycles with 15 seconds of dwelling time in each 5℃ and 55℃ water baths. Toothbrush abrasion test was conducted under a load of 1.5 N and the abraded surfaces were examined with surface roughness tester (SV-3000, Mitutoyo Co, Japan) and SEM (JSM-5800, JEOL, Japan). Fluoride recharging was done by toothbrushing for 3 min. using a fluoride toothpaste (Perio Alpine Herb, LG Household & Health Care, Korea). The results obtained were summarized as follows; 1. The highest tensile strength value of 32.3 MPa was observed in TC group and the lowest value of 16.8 MPa was observed in CF group. The tensile strength of TC group was significantly higher than those of CF and DF groups (P<0.05). 2. The lowest Ra value of 0.287 was observed in TC group and the highest value of 1.516 was observed in FT group. The Ra value of FT group was significantly higher than other groups (P<0.05). 3. The abraded surfaces revealed the increase of surface roughness due to the protrusion and missing of filler particles. 4. The release of fluoride of compomers after tooth brushing by Perio Alpine Herb was initially large and then followed by small and continuously. But it remains small and constant in fluoride-releasing composite resin of TC. 5. The highest value of fluoride release after toothbrushing by Perio Alpine Herb was 2.064 μg/cm² in CF group and the lowest value was 0.119μg/cm² in TC group. The amount of fluoride release of CF group was significantly higher than other groups (P<0.05).

Stainless steel crown 순면위에 레진피복을 이용한 전치부 심미적 수복

안수현,김재곤,백병주,박종하 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.4

Despite dentistry's attempts to improve the dental health of the public and to minimize the effects of caries, many children still present with extensive destruction of primary anterior teeth. One of dentistry's most challenging tasks is to repair these teeth with restoration which are durable, retentive, and esthetic. Esthetic restoration can often be achieved with polycarbonate crowns, strip crowns, conventional S-S crowns, open-faced S-S crowns, commercially veneered S-S crowns. But, all of these have limitation. Advances in restorative materials and metal-bonding procedures have made possible new restorative techniques that combine the advantages of S-S crowns with the cosmetics of composite restoration methods. The described technique of bonding composite to trimmed and fitted S-S crowns offers many advantages over other techniques currently used to restore primary anterior teeth. 1. If S-S crowns are accurate trimmed and contoured, good retention of crowns is achieved. 2. The patient time required is similar to that of conventional S-S crowns. 3. Good esthetics and high bond strengths are achieved. 4. It is possible to use this veneering technique intraorally on crowns that have fractured veneers.