http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
하악관 위치 분석시 일반단층사진과 전산화단층사진의 비교연구
최항문,유동수 大韓口腔顎顔面 放射線學會 1995 Imaging Science in Dentistry Vol.25 No.2
The purpose of this study was comparision of conventional tomography with reformatted computed tomography for dental implant in locating the mandibular canal. Five dogs were used and after conventional tomographs and reformatted computed tomographs were taken, four dentist traced all films. Mandibles were sectioned with 2mm slice thickness and the sections were then radiographed(contact radiography). Each radiographic image was traced and linear measurements were made from mandibular canal to alveolar crest, buccal cortex, lingual cortex, and inferior border. Following results were acquired : 1. Reformatted computed tomographs were exacter than conventional tomography by alveolar crest to canal length of -0.6mm difference between real values and radiographs. 2. The average measurements of buccal cortex to mandibular canal width and lingual cortex to mandibular canal width of conventional tomographs were exacter than reformatted computed tomographs, but standard deviations were higher than reformatted computed tomographs. 3. Standard deviations of reformatted computed tomographs were lower than conventional tomographs at all comparing sites 4. At reformatted computed tomography 62.5% of the measurements performed were within ±1mm of the true value, and at conventional tomography 24.1% were. 5. Mandibular canal invisibility was 0.8% at reformatted computed tomography and 9.2% at conventional tomography. Reformatted computed tomography has been shown to be more useful radiographic technique for assessment of the mandibular canal than conventional tomography.
X-線 照射가 顎骨發育에 미치는 影響에 關한 實驗的 硏究
劉東洙 大韓顎顔面 放射線學會 1978 Imaging Science in Dentistry Vol.8 No.1
The author observed the effect of x-ray irradiation on the development of the mandible in the fetuses and growing albino rats. The fetuses were irradiated on the 7½th day of gestation, 100, 200, 300, and 400 rads of x-ray respectively. The experimental animals were sacrificed on the 18 ½th day of gestation, and first week, second week and third week after parturition. The results were as follows; 1. The mandible of the 18½th day fetuses showed irregular bone trabeoulae, osteoclasts and osteocyte degeneration on the 300 and 400 rads x-ray irradiated fetuses. 2. In the mandible of the first week rats, there was marked osteocyte degeneration and a lot of osteoclast. 3. In the mandible of the 2nd and 3rd week rats bone remodeling was evident. The 3rd week rats also showed alteration of blood vessel wall.
Small but Mighty Enemies of the Skin: Scabies Mites and Bedbugs
유동수,민경현,이영복 대한의진균학회 2024 대한의진균학회지 Vol.29 No.1
This review offers an overview of scabies and bedbug infestations, covering their characteristics, life cycles, symptoms, diagnosis, and treatment methods. These parasitic conditions are significant dermatological concerns caused by Sarcoptes scabiei and bedbug species such as Cimex lectularius and Cimex hemipterus, respectively. Scabies mites burrow into the skin, causing intense itching and various skin lesions, while bedbugs are nocturnal insects that feed on human blood, leading to itchy, red lesions. These infestations involve multiple stages, with scabies mites being active at temperatures above 20℃ and bedbugs capable of surviving for extended periods without feeding under optimal conditions. Diagnosis often relies on clinical examination, dermoscopy, microscopic analysis of the skin for mites, eggs, or feces in the case of scabies, and detailed inspections for bedbugs. Treatment for scabies involves applying permethrin cream, while bedbug bites generally resolve within a few weeks with symptomatic treatment to prevent secondary infections. The increasing incidence of these infestations calls for heightened awareness and understanding among healthcare providers and the public to effectively manage and control their spread.