역위매복된 상악 중절치의 외과적 노출과 교정력을 이용한 증례보고

최형준,최병재,김재윤,이제호 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.3

Inverted maxillary incisor is a state in which the maxillary incisor rotates to the upward position. The present report provides two examples of correction of inverted maxillary incisors with surgical intervention & orthodontic appliance. Through surgical exposure & direct bonding of lingual button, the central incisor were brought into proper eruption path with elastic traction. The case 1 & 2 were both treated successfully. The results showed the good position of treated teeth and satisfactory esthetics and adequate width of keratinized gingiva were achieved. Careful differential diagnosis procedure is needed in order to avoid dissatisfactory rusults and the treatment approaches taken in this case report provided an esthetic and functional results.

C-3 및 C-7(치환) 세파로스포린계 항생제의 합성과 항균활성에 관한 연구(2)

河在天,高玉鉉,姜馨龍 조선대학교 약학연구소 1995 藥學硏究誌 Vol.17 No.1

In order to development new cephalosporin antibiotics 7β[(z)-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetamido]-3-[5-(1,5-dimethyl-2-pyrroletetrazol-2-yl]methyl-3-cephem-4-carboxylic acid(9) and 7β-[(z)-2-(2-aminothiazol-4-yl)-2-(methoxyimi no) acetamido]-3-[5-naphthyltetrazol-2-yl]methyl-3-cephem-4-carboxylic acid(10) were synthesized. These compounds were tested for antimicrobial activities in vitro against Bacillus subtilis ATCC 6633, Micrococcus luteus ATCC 9341, Mycobacterium phlei IFO 3158, Alcaligenes faecalis KCTC 1004, Escherichia coli 8S, Salmonella typimurium KCTC 1925, Pseudomonas aeruginosa IFO 13130, Klebsiella pneumoniae KCTC 1560 and Candida albicans ATCC 10231, respectively. Compound(10) showed good antimicrobial activities against Bacillus subtilis ATCC 6633, Micrococcus luteus ATCC 9341 and Mycobacterium phlei IFO 3158 but compound(9) showed lower antimicrobial activities as compare with cefotaxime and cefazolin.

백내장 환자의 시기능지표 : 사전 연구를 중심으로 Pilot study

강형곤,박은철,최윤정,김한중,홍영재,조우현,손명세,임승정 한국의료QA학회 1998 한국의료질향상학회지 Vol.5 No.1

Background : There is increased recognition that rigorous approach to functional assessment will complement the assessment of clinical status. This study is to develop the appropriate visual function index in Korean patients with cataracts by the assessment of the reliability, validity of visual function indexes including VF-14. Methods : An prospective study was performed with 92 patients who had undergone either one eye or both eye cataract surgery by 3 ophthalmologists practicing at a university-hospital. Patients were interviewed, and clinical data were obtained. Doctors were questioned with self-entered questionnaire forms. Medical record was examined to understand surgery-process. The survey was conducted at 1-2 days before cataract surgery. Results : We used following measures : 7 visual function indexes, global measures of patients' trouble and satisfaction with vision, and best-corrected visual acuity (VA) in each eye. 7 visual function indexes showed a high internal consistency reliability (Cronbach's alpha coefficients ≥0.86). The better visual acuity(operated eye. better eye), the higher patient satisfaction with vision, the lower symptom score, the lower patient trouble with vision was correlated with preoperative visual function index scores. Among 7 indexes, VF-12 with the exclusion of 2 items drivings from VF-14 is a high Cronbach's alpha coefficient and correlation coefficient and the highest R². Conclusion : We conclude that VF-12 is reliable and valid in Korea. So we suggest that in Korea, all items of VF-14, the visual function index, which is in use internationally, ought to be surveyed and VF-12 which has been excluded by 2 items of drivings from VF-14 ought to beused for analysis.

디스턴스 마스크를 이용한 겹친 세포핵들에 대한 분리방법 구현

최흥국,허민권,서재현 인제대학교기초과학연구소 1998 자연과학 Vol.2 No.-

영상처리에서 이미지에 대한 분할은 가장 필수적인 조건이다. 특히 의료세포영상과 같은 복잡한 영상들에 대한 분할은 더더욱 어렵다. 또 세포를 정확히 분할을 하더라도 의료세포영상은 세포들간의 중복(겹침)현상이 두드러지게 나타난다. 이러한 겹침 현상은 일정한 것이 아니라 서로 다른 형태와 크기와 모양으로 생긴다. 이러한 특징들을 다 만족하여 분할하기는 많은 노력이 필요하다. 본 논문에서는 특히 병리학분야에서 세포 분석의 중요한 요소를 들고 있는 세포수에 의한 영상분석을 하기 위해 어렵고 복잡한 것이 아니라 유클리디안 디스턴스를 이용한 회선 마스크를 사용하여 간단히 겹침 현상 세포를 셀 수 있는 방법을 제안한다. Image segmentation is important in image processing. Particularly, it is difficult to segment complex image like medical cell tissue image. Although cells are exactly separated, the overlapping cell nuclei with different type, size, and shape appear. In this paper, we present the method using convolution mask based on Euclidean distance to count overlapping cell nuclei simply.

매복 과잉치 발거시의 전후방적 위치선정

최형준,손흥규,최병재,황동환 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.3

Surgical removal of impacted mesiodens can be performed easily when exact position of mesiodens is identified. This case report is argued about methodological approach of exact antero-posterior postioning of mesiodens using conventional cross-sectional occlusal film and periapical film. The author concludes, 1. Among various methods of positioning mesiodens, exact position of mesiodens can be determined with occlusal film and periapical film. 2. On operation, exact antero-posterior position of mesiodens can be determined with comparing occlusal images of adjacent teeth and anatomic structure to real ones. 3. It is important that exact removal course of mesiodens has to be determined in addition to exact determination of one's position, and that it has to be determined in regard to position, morphological basis, direction of impacted pattern of mesiodens and adjacent anatomic structure. 4. In 2 cases presented, both are mesiodens of inverted conical type, and impacted direction are class Ⅰ and Ⅲ respectively according to classification author suggested, and surgery can be performed with ease by different approach directions.

상악 영구 중철지의 외상성 치근파절 : 증례보고 A CASE REPORT

최형준,곽지윤,이종갑,최병재 大韓小兒齒科學會 2003 大韓小兒齒科學會誌 Vol.30 No.3

청소년기에는 두개악안면부위의 외상성 손상이 흔하다. 그러나 상아질, 백아질, 치수를 포함하는 치아파절로 정의되는 치근파절은 비교적 드물다. 치근파절에 대하여 취할 수 있는 적절한 조치는 파절편의 치관부위를 재위치시키고, 2∼3달간 레진강선 고정술을 시행하는 것이다. 치수과사나 치근흡수의 징후가 나타날때까지 근관치료를 보류해야 하는데 대부분의 증례에서 파절편의 치근부위는 그 생활력을 유지하기 때문이다. 본 증례의 10세 4개월된 남아는 상악영구중절치의 치근파절을 주소로 연세대학교 치과병원에 내원하엿으며, 그후 7년동안 동일부위에 2번의 반복적인 외상이 있었으나 파절편 치관부의 재위치, 레진 강선 고정술, 근관치료 시행 후 임상적으로 방사선학적으로 비교적 양호한 치료결과를 얻었기에 보고하는 바이다. Traumatic injuries in the young permanent dentition are common, but root fractures, defined as fractures in volving dentin, cementum and pulp, are relatively uncommon. Appropriate management of root fracture involves repositioning the coronal portion of the tooth fragment and firm immobilization with a splint for 2 to 3 month. Root canal treatment should not be initiated until the sign of necrosis or resorption are apparent because in most cases, the apical fragments maintain their vitality. The following case report describes a patient with root fractures injured three times over the period of 7 years. The results, clinically and radiographically, were acceptable, but term periodic evaluation is required.

구순 구개열 환아의 수유 보조 장치에 대한 증례보고

최형준,손흥규,최병재,박동석 大韓小兒齒科學會 1995 大韓小兒齒科學會誌 Vol.22 No.2

Cleft lip, cleft palate, cleft lip and palate are the most common congenital anomalies in cranio-orofacial region. These anomalies lead to esthetic problem as well as to difficulties in feeding and speech and also to chronic infection of upper airway and to disturbance of jaw growth during growing up. Especially, some difficulties during feeding make parents to be confused and puts infants in dangerous position. But these difficulties can be controlled by proper feeding methods according to pattern of cleft lip and palate. Among these feeding methods, feeding appliance is the most safe and relatively easy to manufacture. Early wearing of this appliance makes cleft lip and palate infants to a normal feeding and weight gain. As a member of team approach for the treatment of cleft lip and palate, a pediatric dentist should solve the feeding problems which cleft lip and palate infants and its parents are confronted and help in receiving further treatment.

미성숙 영구치의 치근파절에 관한 증례보고

최병재,손흥규,김수연,최형준 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.3

During the eruption of permanent teeth, Traumatic root fractures in young permanent incisors are rare. They occur most commonly in the maxillary central incisors of male patient and are frequently seen in the coronal third of the root. Permanent incisors are very important in terms of esthetics as well as of function, and so conservative treatment is advisable. It is important to maintain vitality of pulp to achieve better result. Location of the fracture line determines the Prognosis. No clinical change were seen in this three case. A case of central incisor with apparent healing of a root fracture without any tratment is presented in this paper. Long term clinical observation is required periodically.

A1₂O₃/SiC 나노복합체의 소결거동과 기계적 특성에 관한 연구

이재열,이재형,김원병 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.1

Al₂O₃/5vol.% SiC nanocomposites have been prepared by pressureless sintering and isostatical hot pressing to investigate sintering behaviors and mechanical properties. Al₂O₃/SiC nanocomposites with high density(more than 99% theoretical density) could be obtained by pressureless sintering and hot isostatical sintering. TEM photographs showed that SiC particles were distributed uniformly in Al₂O₃matrix with typical intra/inter type microstructure. SEM photographs showed that Al₂O₃/SiC nanocoposites had a transgranular fracture mode. Fracture strength have been increased significantly by annealing the composites owing to the surface flaw healing effect and residual compressive stress.

Hypophosphatasia 환아의 치료 증례

최병제,최형준,이제호,김기덕,박수정 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.3

1. Hypophosphatasia 는 골조직 및 치아조직의 비정상적인 석회화를 나타내는 대사장애로, 특징적구강내 소견 인 우치의 조기탈락 양상으로 치과에서 조기진단이 가능하다. 2. 본 증례에서 상악궁 확장을 동반한 의치 제작으로 심미적, 기능적으로 양호한 결과를 얻었으며, 영구치열기 까지 장기적 관찰 및 치료가 필요할 것으로 사료된다. hypophosphatasia is a rare metabolic disorder which manifests characteristics such as abnormal mineralization of bone and dental tissues, diminished serum and tissue alkline phosphatase, and increased urinary secretion of PEA. It ingerited as an autosomal recessive or dominant trait and occurs in all races. In general, hypophosphatasia can be classified in 4 subtypes which are the perinatal, infantile, childhood, adult type depending upon the age at presentation and severity. In young children with Hypophosphatasia the long bones show irregular defects, and the skull showes poor calcification. In older children with premature closure of the skull sutures there may ve multiple lucent area called gyral or convolutional markings, described as resimbling beaten copper, presumably resulting from increased intracranial pressure,Examination of the jaws reveals a generalized lucency of the maxilla and mandible, the cortical bone and lamina dura are thin, and the alveolar bone may be deficient. Clinical features of Hypophosphatasia imclude premature loss of deciduous teeth, especially incisors, hypoplasia of aplasia of root cementum, enamel hypoplasia, irregular calcification of dentin, large pulp chamber, and resorption of marginal alveolar bone and roots. Our report involves a patient with a chief complaint of early loss of both Mx. and Mn. deciduous ncisors. after conducting a through clinical and radiographic examination this patient was referred to pediatrics under the suspicion of hypophosphatasia, the diagnosis proved to be correct and successful results were accomplished through a denture made to improve esthetics and function.