하악 제2대구치의 C형 근관계에 관한 연구

이동균,박준모,황호길 대한치과보존학회 2007 Restorative Dentistry & Endodontics Vol.32 No.4

만곡근관의 확대시 기구에 따른 형태변화에 관한 연구

황호길,신영근,이석종 大韓齒科保存學會 1999 Restorative Dentistry & Endodontics Vol.24 No.3

하악과두 골절에 대한 임상적 연구

손보형,이효빈,황호길,윤창륙,여환호 大韓顎顔面成形再建外科學會 1992 Maxillofacial Plastic Reconstructive Surgery Vol.14 No.4

The author investigated the 162 patients with the condylar fractres of the mandilble who were admitted in Dept. of Oral and Maxillofacial Surgery, Hospital of Chosun Dental School from January 1985 to September 1992 clinically, including fracture incidennce, age and sex of the patients, causes of injures, associated injures, treatments and complications and obtained the following results. 1. Of the 449 patients with mandibular fractures, 162patients suffered condylar fractures(36.1%). 2. Of the 162 patients, males with condylar fractures were 128 patients, by a ratio of 3.8 : 1. 3. The most frequently affected age group was the third decade(32.7%). 4. Falls were ranked as the predominant cause(50.6%), followed by traffic accident(27.8%) and violence (16.0%). 5. The incidence of single condylar fractures was 28% and symphysis fractures were the most commomest of the concomittant injuries(60%). 6. The subcondylar fractures occurred most frequently(41.6%) and anteromedial displacement of the condylar fragments occurred most frequently(45.4%) 7. Of the all condylar fracture patients, children under 15 of age comprized 31 patients(19.1%) and condylar head fractures occurred most frequently at those children. 8. Of the managetments in condylar fractures, open reduction was 52.5% and remainder were closed reduction(47.5%). 9. Complications ensured such as TMJ ankylosis, limitation of mouth opening and mandibular movements, TMJ dysfunction, and anterior open bite.

재근관치료를 통한 치근단 병소의 치유

전정훈,이연재,황호길 조선대학교 구강생물학연구소 2002 Oral Biology Research (Oral Biol Res) Vol.26 No.2

The cases of two patients with large periapical lesions are presents. Most of the periapical lesions formed as a result of improper endododtic treatment. Following conservative nonsurgical endododtic retreatment, there was resolution of the periapical lesion and clinical symptom. These results suggest that the sizes of a periapical lesion dose not mandate its surgical removal and even periapical lesions heal fellowing conservative nonsurgical endododtic retreatment.

제2형 근관의 확대에 따른 최종근관장파일 크기의 비교

정은주,이동균,백신영,황호길 大韓齒科保存學會 2008 Restorative Dentistry & Endodontics Vol.33 No.5

제2형의 근관형태를 갖는 치아에서 각각의 근관을 모두 근관장까지 확대한 경우,여러 확대기구에 따른 최종근관장파일의 크기를 상호 비교하여 얼마나 많은 변화가 있었는지를 분석하고자 치근 우식이 없고 치근단공 형성이 완료되었으며 2개의 근관 입구에서 시작하여 하나의 치근단공을 갖는 제 2형의 근관형태를 보이는 상악 소구치,상악 대구치의 근심협측 치근 및 하악 대구치의 근심 치근을 선택하여 확대기구에 따라 KF 군, PT 군,HS 군, K3 군으로 분류하고 치경부 조기 확대를 시행하였다. 초기근관장파일이 15번 크기인 지아를 각 군당 20개씩 무작위로 선택하였고,모든 근관을 각 군에 해당되는 30번 크기의 파일까지 제조회사의 지시에 따라 확대를 시행한 후,촉감과 universal testing machine을 이용하여 최종근관장파일의 크기를 결정하였다. 각 군의 최종근관장파일의 크기와 제거 시 요구되는 힘의 크기에 대한 유의성 검증은 one-way ANOVA를 이용하여 비교 분석하였으며,사후검정은 Tukey HSD test를 이용하여 0.05의 유의수준에서 분석하였다. 본 연구의 결과 제2형의 근관형태를 갖는 치아의 근관확대 시,모든 근관을 각각의 근관장으로 확대하는 방법은 확대에 마지막으로 이용된 기구의 크기보다 한,두 단계 정도 증가된 최종근관장파일을 나타냈다. 그러므로 제2형 근관형태를 나타내는 치아의 근관치료 시 임상가들은 근관충전에 앞서 치근단 받침을 다시 확인하고 형성하는 과정이 필요하리라 사료된다. Type II root canal was defined that two canals leave the chamber and merge to form a single canal at short of the apex. The aim of this study was to analyse the master apical file (MAF) size according to various instrumentation techniques in the type II root canal when each canal was enlarged to working length. Eighty mesial roots of molar with ISO #15 initial apical file (IAF) size in type II root canals were randomly divided into four experimental groups with 20 teeth each. According to enlarging instruments, four groups are: K-FLEXOFILE^(?) (KF), engine-driven Ni-Ti PRoT_(APER)^(?)(PT), HERO Shaper^(?)(HS), K³™ (K3). All canals were enlarged to each working length with ISO #30 size: #30 in KF, F3 in PT, .04/30 in HS, and .06/30 in K3. The master apical file (MAF) size was confirmed by tactile sensation and universal testing machine (EZ test, Shimadzu Co., Kyoto, Japan). The mean MAF size was statistically compared using one-way ANOVA and Tukey HSD test at the 0.05 probability level. These results show that the MAF size was appeared one or two sizes larger than the final enlarging instrument when all canal in type II configuration were enlarged to each working length. Therefore, the clinician have to confirm the apical stop once more after instrumentation of type II root canal.

하악 대구치 Ⅱ형 근심 근관에서 치근단 부위의 만곡도 조사

윤혜림,이동균,황호길 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2

Objectives: The purpose of this study was to evaluate the buccolingual curvature at the apical one third in type Ⅱ mesial canals of mandibular molars using the radius and angle of curvature. Materials and Methods: Total 100 mandibular molars were selected. Following an endodonticaccess in the teeth, their distal roots were removed. #15 H- or K-files (Dentsply Maillefer) were inserted into the mesiobuccal and mesiolingual canals of the teeth. Radiographs of the teeth were taken for the proximal view. Among them, type Ⅱ canals were selected and divided into two subgroups, Ⅱa and Ⅱb. In type Ⅱa, two separate canals merged into one canal before reaching the apex and in type Ⅱb, two separate canals merged into one canal within the apical foramen. The radius and angle of curvature of specimens were examined. Results: In type Ⅱ, mean radius of curvature in mesiolingual and mesiobuccal canals were 2.82 mm and 3.58 mm, respectively. The radius of the curvature of mesiolingual canals were significantly smaller than that of mesiobuccal canals in type Ⅱ, and especially in type Ⅱa. However, there were no statistically significant differences in radius of curvature between mesiobuccal and mesiolingual canals in type Ⅱb and there were no significant differences in angle of curvature between type Ⅱa and Ⅱb. Conclusion: In this study, type Ⅱ mesial canals of mandibular molars showed severd curvature in the proximal view. Especially, mesiolingual canals of type Ⅱa had more abrupt curvature than mesiobuccal canals at the apical one third.

주근단공의 조건에 따른 Root ZX의 정확성 평가

박신영,이동균,황호길 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2

Objectives: The purpose of this study was to assess the accuracy of Root ZX (J. Morita Corp.) according to the location of major foramen and open apex. Materials and Methods: 81 mandibular premolars with mature apices were selected. After access preparation, 27 teeth were instrumented to simulate open apices. 54 teeth were classified according to location of major foramen under surgical microscope (x16). The file was fixed at the location of apical constriction by Root ZX using glass ionomer cement. The apical 4 mm of the apex was exposed and photo was taken and the distance from file tip to the major foramen was measured by calibrating metal ruler on graph paper. The results were statistically analyzed using ANOVA and Scheffe test at p < 0.05 level. Results: mean distance from file tip to major foramen was 0.308 mm in Tip foramen group (Ⅰ), 0.519 mm in Lateral foramen group (Ⅱ) and 0.932 mm in open apex group (Ⅲ). Root ZX located apical constriction accurately within ± 0.5 mm in group Ⅰ of 85.71%, in group Ⅱ of 59.09%, and in group Ⅲ of 33.33%. There was a statistically significant difference between group Ⅰ and Ⅲ (p < 0.05). Conclusion: Root ZX located apical constriction accurately regardless of location of major foramen. However, Root ZX couldn't find it in open apex. Clinicians have to use a combination of methods to determine an appropriate working length at open apex. It may be more successful than relying on just electronic apes locator. (Restor Dent Endoe 2012;37(2):68-73)

Prolonged bilological activity of positional isomers of mono PEFylated Exendin-4

LEE Kang Choon,CHAE Su Young,LEE Keel Ho 대한약학회 2006 大韓藥學會 總會 및 學術大會 Vol.2006 No.2

자하거(紫河車) 약침(藥鍼) 제제(製劑)에 대(對)한 고찰(考察)

이상길,이재동,고형균,박동석,이윤호,강성길,Lee, Sang-Keel,Lee, Jae-Dong,Koh, Hyung-Kyun,Park, Dong-Suk,Lee, Yun-Ho,Kang, Sung-Keel 대한침구의학회 2000 대한침구의학회지 Vol.17 No.1

Hominis Placenta has been used as a medicinal stuff for a long time in Oriental Medicine. And further, aqua-acupuncture solution of Hominis Placenta has produced in South Korea recently. Bibliographical study was carried on to investigate the nature of Hominis Placenta and possible indications by aqua-acupuncture as well. The nature of Hominis Placenta is warm and its taste sweet-salty. It is non-poisonous. It has correspondence to the meridians of lung, liver and kidney. Hominis Placenta is mainly effective on recuperation of infirmity and the disease related to infirmity. Aqua-acupuncture solution of Hominis Placenta can be applied to the disease as chronic hepatitis, liver cirrhosis, asthma, pulmonary tuberculosis, sterility, insufficient lactation, degenerative change, neurasthenia and cerebrovascular disease.

급성 치수염 및 급성 치근단 농양의 치근관으로부터의 세균 분리 및 동정

이연재,김미광,황호길,국중기 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.5

치아우식증 및 치주질환에 이환 여부와 치근단 병소의 존재 유무에 따라 급성 치수염 또는 급성 치근단 농양이라고 진단된 17개 치아의 치관부 치수를 제거하고, 치근에 존재하는 괴사된 치수 및 농양부위의 샘플을 채취하여, 혐기성 상태에서 세균을 배양하고, 이들을 16S rDNA 클로링 및 핵산염기서열결정법으로 종 수준에서 동정하였다. 그 결과 17개의 치근관 감염 병소에서 모두 71개의 세균 군락이 자라났으며, 그 중 계대 배양을 통해서 적응하여 자라난 것이 56 균주였다. 치아우식증에 의한 치근관 감염 병소와 치아우식증이 아닌 다른 원인에 의한 치근관 감염 병소에서 검출되는 세균은 서로 다른 양상을 보였다. 즉, 치아우식증에 의한 치아의 치근관 감염 병소에서 연쇄상구균들이 72.7%(8/11)로 가장 많은 빈도로 검출되었다. 반면에 치아우식증이 없는 치아의 치근관 감염 병소에서는 Actinomyces 속의 균주들이 66.7%로 가장 높은 빈도로 검출되었다. 치근단 병소가 있는 경우의 치근관 감염 병소에는 대체로 혐기성 세균인 Clostridia 아문, Bacteroides 문, Fusobacteria 문의 균주들이 검출되었지만, 치근단 병소가 없는 치아에서는 검출되지 않았다. 반면에 치근단 병소가 없는 치근관 병소에서는 연쇄상구균(60%)과 Actinomyces 속(50%)의 균주들이 높은 빈도로 검출되었다. 본 연구에서는 아직까지 종 수준에서 동정되지 않은 2 균주(ChDC B639 및 ChDC B631)의 Actinomyces 속에 속하는 균주가 분리되었다. 이상의 결과를 종합할 때, 세균배양법에 의한 치수 및 치근단 감염 병소에서는 다양한 세균이 검출되었으며, 이는 치근관 감염이 여러 세균에 의해 발병 및 진행된다는 기존의 연구 결과와 동일함을 알 수 있었다. 또한 본 연구 결과 분리 동정된 균주들은 치근관질환과 이와 관련된 세균간의 역학조사에 중요한 자원으로 이용될 수 있을 것으로 생각된다. The aim of this study was to identify the bacteria isolated from acute endodontic lesions by cell culture and 16S rDNA sequencing. The necrotic pulpal tissue was collected from 17 infected root canals, which were diagnosed as being either an acute pulpitis or acute periapicai abscess. Samples were collected aseptically from the infected pulpal tissue of the infected root canals using a barbed broach and a paper point. The cut barbed broaches and paper points were transferred to an eppendorf tube containing 500 ul of 1 X PBS. The sample solution was briefly mixed and plated onto a BHI- agar plate containing 5% sheep blood. The agar plates were incubated in a 37℃ anaerobic chamber for 7 days. The bacteria growing on the agar plate were identified by 16S rRNA coding gene (rDNA) cloning and sequencing at the species level. Among the 71 colonies grown on the agar plates, 56 strains survived and were identifled. In dental caries involving the root canals, Streptococcus spp. were mainly isolated. Actinomyces, Clostridia, Bacteroides and Fusobacteria were isolated in the periapical lesion without dental caries. Interestingly, two new Actinomγces spp. (ChDC B639 and ChDC B631) were isolated in this study. These results showed that there was diversity among the species in endodontic lesions. This suggests that an endodontic infection is a mixed infection with a polymicrobial etiology. These results may offer the bacteriai strains for pathogenesis studies related to an endodontic infection.