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가토에서 하악골 신연 6주후 신연양에 따른 두개하악관절의 조직병리학적 변화
김현호(Hyun-Ho Kim),김수관(Su-Gwan Kim),임성철(Sung-Chul Lim),정해만(Hae-Man Chung),김생곤(Sang-Gon Kim) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.2
The purpose of this study is to observe histopathologic changes in the bilateral craniomandibular joints after allowing 6 weeks of consolidation by varying the amount of distraction in rabbit mandible. Eight rabbits weighing about 2 to 3 kg were used. After corticotomy was performed on the left mandibular body between the first premolar and the second premolar region, a unilateral fixation device was placed. Then, a 7-day period was allowed without distraction of the device. The mandible was lengthened 0.5 mm/day. Corticotomy and lengthening of mandible were not performed in control group. After the completion of the lengthening process, a 6-week-consolidation period was allowed. Then, the rabbits were sacrificed, and histologic examination of the craniomandibular joints was performed. Proliferative changes were observed in the craniomandibular joints in all groups. With the increasing amount of distraction, hypertrophy of the cartilage layer became more severe, bone formed was dense and enchondral ossification was clearly shown in subchondral bone. Hypertrophy of the cartilage layer was also seen in the non-distracted side as the distracted side in the experimental group. These results indicate that when physical force is applied constantly to joints, the proliferation of articular cartilage and bone formation are present. When more than 6 weeks of consolidation period is allowed at the time of performing distraction for more than 5 mm, articular changes, especially, in the contralateral side should also be noted.
분자생물학적 기법을 이용한 악골 골수염 병소의 세균 동정
김미성(Mi-Sung Kim),김수관(Su-Gwan Kim),정해만(Hae-Man Chung),김생곤(Sang-Gon Kim),국중기(Joong-Ki Kook),김미광(Mi-Kwang Kim),김화숙(Hwa-Sook Kim),유소영(So Young Yoo) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.1
The purpose of this study was to isolate and identify the bacteria in osteomyelitis lesion of 3 patients. Two lesions were due to the post-infection after extraction. The other was resulted from mal-fixation of both sides of mandibular angles. Pus samples were collected by needle aspiration from the lesion and examined by culture method. Bacterial culture was performed in three culture systems (anaerobic, CO2, and aerobic incubator). Identification of the bacteria was performed by 16S rRNA gene cloning and nucleotide sequencing method. Our results showed that Streptococci species was predominantly isolated in both lesions of extraction socket. Only one species (Proteus vulagris) was detected in lesion of mandibular angle. This study was not sufficient to identify the causative bacteria in those osteomyelitis. However, our data may be offered the clue to solve the problem.
한국인 아동 측방 영구치군의 맹출속도 및 시기에 관한 연구
정해만,정재헌,이동주 朝鮮大學校 口腔生物學硏究所 1989 口腔生物學硏究 Vol.13 No.-
This study was done to observe the changes in calcification and eruption rates and sepuence and eruption timing of developing buccal permanent teeth. For that purpose, 35 male and 36 famale subjects who have no significant mechanical interference in erupting path were selected. Then orthopantomographs were taken with 6 months interval. Comparative study was done and the following results were obtained : 1. There was no upgrade on the stage of calclfication. 2. On the eruption rate, the greatest change was seen at the stage of two thirds of root completed. 3. The chrohologic ages that arrived each calcification stage were advanced in female subjects than male ones. 4. The seqence of eruption was first premolar, canine, seclond premolar in male both on maxila and mandible, but in female, first premolar, canine, second premolar on maxilla, and canine, first premolar, second premolar on mandible.