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이경호,안형규,Lee Kyung-Ho,Ahn Hyung-Kyu 대한영상치의학회 1987 Imaging Science in Dentistry Vol.17 No.1
The purpose of this study was to aid in diagnosis of salivary gland disease by comparing the sialogram with the scintigram. In this study, 47 patients (52 glands) who had taken the sialography and the scintigraphy were examined. The result of two methods was compared with the clinical and operative diagnosis. The following results are obtained. 1. In inflammatory diseases of the salivary gland, the scintigraphy can be a valuable substitution for a sialography. 2. In inflammatory diseases of the salivary gland, we can get more informations in case of the combined use of the sialography and the scintigraphy. 3. In tumorous lesion of the salivary gland, the sialography is superior to the scintigraphy. But both methods are less valuable in diagnosing the extraglandular tumors.
지역사회 거주 노인의 타액선 기능저하 (구강건조) 평가 및 중재
소종섭,정회인,강정현,김지훈 대한노년치의학회 2022 대한노년치의학회지 Vol.18 No.2
Salivary gland hypofunction (dry mouth) is the most common dysfunction in older adults. It causes a deterioration in oral health, mastication, and swallowing functions. It can also lead to systemic frailty. Early diagnosis and intervention are required to prevent oral and systemic frailty. This literature review introduced the salivary gland hypofunction assessment methods and interventions applicable in community-dwelling older adults. The study proposed an oral mucosal wetness test. The test uses an oral moisture-checking device as the primary test for assessment considering logistic aspects in application to the elderly in the community. The clinical oral dryness score (CODS) is an alternative test. The assessment method of oral mucosal wetness showed a significant correlation with salivary secretion rate. The CODS system is also significantly correlated with mucosal wettability, salivary secretion rate, and severity of oral dryness. Therefore, they have proven useful as test tools for assessing salivary gland hypofunction and oral mucosal wetting. The subjective questionnaire (xerostomia inventory) is also a useful tool for determining the severity of dry mouth and can be combined with other examination methods for salivary gland hypofunction such as oral mucosal wetness test or CODS. Essential interventions to salivary gland disfunction include drug coordination, prescription of artificial saliva, expert application of fluoride varnish, and salivary gland stimulation exercises. Careful consideration of other oral functions, such as occlusal force, tongue pressure, tongue movement, and oral hygiene management ability, is also required. Comprehensive intervention must be planned. Many studies have shown that the degradation of one function leads to that of another. Conversely, improving each function can improve other oral and integrated functions, such as masticatory and swallowing functions. The ultimate purpose of the intervention for salivary gland hypofunction in community-dwelling older adults is to improve and maintain oral functions—mastication, swallowing, and pronunciation. Therefore, interventions should include complex interventions such as oral exercise, tongue pressure enhancement training, oral hygiene, and interventions to improve salivary gland function. The intervention for individual salivary gland dysfunction should be planned with a comprehensive perspective for maintaining integrated oral function and contributing to the prevention and management of systemic frailty and its complications.
측두하악관절에 대한 cone beam형 전산화단층영상과 자기공명영상의 비교
김규태,최용석,황의환,Kim, Gyu-Tae,Choi, Yong-Suk,Hwang, Eui-Hwan 대한영상치의학회 2008 Imaging Science in Dentistry Vol.38 No.3
Purpose : To compare and evaluate the diagnostic ability of cone beam computed tomography (CBCT) and magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ). Materials and Methods : CBCT and MRI of 46 TMJs of 23 patients with TMJ disorders were evaluated. They were divided into 3 groups according to the position of the articular disc of the TMJ at closed mouth position and the reduction of the disc during open mouth position on MRI: no disc displacement group (NDD), disc displacement with reduction group (DDR), and disc displacement without reduction group (DDWR). With PACS viewing soft-wares, position of mandibular condyle in the articular fossa, osseous change of mandibular condyle, shape of articular fossa, and mediolateral and anteroposterior dimensions of mandibular condyle were evaluated on CBCT and MRI. Each value was tested statistically. Results : The position of mandibular condyle in the articular fossa were concentric in the NDD, DDR, and DDWR of CBCT and NDD of MRI. However, condyle was positioned posteriorly in DDR and DDWR of MRI. Flattening, sclerosis and osteophyte of the mandibular condyle were much more apparent on DDR of CBCT than MRI. And the erosion of the condyle was much more apparent on DDWR of MRI than CBCT. Box and Sigmoid types of articular fossa were found most frequently in DDR of MRI. Flattened type was found most frequently in DDR of CBCT and deformed type was found most frequently in DDWR of CBCT. No significant difference in mediolateral and anteroposterior dimensions were shown on CBCT and MRI. Conclusion : Since MRI and CBCT has unique diagnostic imaging ability, both modalities should be used together to supplement each other to evaluate TMJ.
Cone-beam CT와 multi-detector CT영상에서 측정된 CT number에 대한 비교연구
김동수,한원정,김은경,Kim, Dong-Soo,Han, Won-Jeong,Kim, Eun-Kyung 대한영상치의학회 2010 Imaging Science in Dentistry Vol.40 No.2
Purpose : To compare the CT numbers on 3 cone-beam CT (CBCT) images with those on multi-detector CT (MDCT) image using CT phantom and to develop linear regressive equations using CT numbers to material density for all the CT scanner each. Materials and Methods : Mini CT phantom comprised of five 1 inch thick cylindrical models with 1.125 inches diameter of materials with different densities (polyethylene, polystyrene, plastic water, nylon and acrylic) was used. It was scanned in 3 CBCTs (i-CAT, Alphard VEGA, Implagraphy SC) and 1 MDCT (Somatom Emotion). The images were saved as DICOM format and CT numbers were measured using OnDemand 3D. CT numbers obtained from CBCTs and MDCT images were compared and linear regression analysis was performed for the density, $\rho$ ($g/cm^3$), as the dependent variable in terms of the CT numbers obtained from CBCTs and MDCT images. Results : CT numbers on i-CAT and Implagraphy CBCT images were smaller than those on Somatom Emotion MDCT image (p<0.05). Linear relationship on a range of materials used for this study were $\rho$=0.001H+1.07 with $R^2$ value of 0.999 for Somatom Emotion, $\rho$=0.002H+1.09 with $R^2$ value of 0.991 for Alphard VEGA, $\rho$=0.001H+1.43 with $R^2$ value of 0.980 for i-CAT and $\rho$=0.001H+1.30 with $R^2$ value of 0.975 for Implagraphy. Conclusion: CT numbers on i-CAT and Implagraphy CBCT images were not same as those on Somatom Emotion MDCT image. The linear regressive equations to determine the density from the CT numbers with very high correlation coefficient were obtained on three CBCT and MDCT scan.
이병도,Lee, Byung-Do 대한영상치의학회 2007 Imaging Science in Dentistry Vol.37 No.1
Fibro-osseous lesions are composed of connective tissue and varying amount of mineralized substances, which may be bony or cementum-like structures. It is necessary for oral radiologist to differentiate due to the tendency of these fibro-osseous lesions to show similar histopathologic appearances, while the management of each lesion is different. However we often encounter a little difficulty in judgement because there are some overlaps between concept of each lesions. So recently I suggest, we face a need to review basic concept and classification of several fibro-osseous jaw lesions. In this article, several fibre-osseous lesions, such as fibrous dysplasia, cemento-ossifying fibroma and cemento-osseous dysplasia, will be discussed basing on the review of literature. particular emphasis will be made on the nomenclature revision of WHO's classification in 1992.
이지현,정연화,조봉혜,황대석,Lee, Ji-Hyun,Jung, Yun-Hoa,Cho, Bong-Hae,Hwang, Dae-Seok 대한영상치의학회 2010 Imaging Science in Dentistry Vol.40 No.1
Purpose : The purpose of this study was to evaluate the diagnostic efficacy of panoramic radiographs for detection of mandibular fractures. Materials and Methods : The sample was comprised of 65 patients (55 fractured, 10 non-fractured) with 92 fracture sites confirmed by multi-detector computed tomography (CT). Panoramic radiographs were evaluated for mandibular fractures by six examiners; two oral & maxillofacial radiologists (observer A&B), two oral & maxillofacial surgeons (observer C&D), and two general dentists (observer E&F). Results : Sensitivity of panoramic radiography for mandibular fractures was 95.7% in observer A&B, 93.5% in observer C&D and 80.4% in observer E&F. The lowest sensitivity was shown in symphyseal/parasymphyseal areas, followed by subcondylar/condylar regions. Conclusion : Panoramic radiography is adequate for detection of mandibular fractures. However, additional multidetector CT is recommended to ascertain some indecisive fractures of symphysis and condyle, and in complicated fractures.
일반 측방 두부규격 방사선사진과 측방 추부규격 전산화 방사선사진에서의 계측점의 신뢰도에 대한 비교 연구
김형돈,김기덕,박창성,Kim Hyung-Don,Kim Kee-Deog,Park Chang-Seo 대한영상치의학회 1997 Imaging Science in Dentistry Vol.27 No.1
The purpose of this study was to compare & to find out the variability of head film measurements (and marks identification) between Fuji computed radiographic cephalometry and conventional cephalometry. 28 Korean adults were selected. Lateral cephalometric FCR film and conventional cephalometric film of each subject was taken. Four investigators identified 24 cephalometric landmarks on lateral cephalometric FCR film and conventional cephalometric film. The comparable measurements between lateral cephalometric FCR film and conventional cephalometric film were statistically analysed. The results were as follows : 1. In FCR film & conventional film, coefficient of variation (C.V.) of 24 landmarks was taken horizonta1ly & vertically. There is no significant difference of rank order of landmarks in C.V. between two films. 2. In comparison of significant differences of landmarks variability between FCR film & conventional film, horizontal value of coefficient of variation, showed significant differences in four landmarks among twenty-four landmarks, but vertical value of coefficient of variation showed significant differences in sixteen landmarks among twenty-four landmarks. FCR film showed significantly less variability than conventional film in 17 subjects among 20(4+16) subjects that showed significant difference.
박태원,Park Tae Won 대한영상치의학회 1976 Imaging Science in Dentistry Vol.6 No.1
The author had observed 48 cases diagnosed as oral malignancies of the patients who visited to the infirmary of Dental College of Seoul National University from 1973 to July 1976. The following results were obtained. 1. 5 decades age group showed the highest incidence and there was hardly difference in sex. 2. From the histopathological view point, most of cases were squamous cell carcinoma. 3. Most of cases were considerably in advance and showed the bony destruction not only primary site, but of surrounding structures.
고석민,이지나 대한노년치의학회 2022 대한노년치의학회지 Vol.18 No.2
Korea is on the verge of becoming a super-aged society, and the structure of the disease is changing accordingly. One of the measures to lower the medical and social burden for the elderly is early detection and prevention of elderly frailty. Oral frailty in elderly is reported to be manifested prior to whole body frailty. So, if oral frailty is diagnosed and treated early, independency in mobility and healthy aging of elderly can be effectively promoted. The Korean Academy of Geriatric Dentistry launched establishing a clinical guideline of oral frailty for Korean elderly with diagnostic criteria and treatment modality. If two out of the six criteria, chewing function, occlusal force, tongue force, salivary gland function, swallowing function, and oral hygiene, are checked as not ‘normal’ but ‘at risk’, the patient is diagnosed as having oral frailty. In this paper, evaluation methods and exercise therapies for swallowing function (out of the six criteria for oral frailty) is described in detail.
의학적 의사결정 도구들에 대한 고찰 : Bayesian analysis and ROC analysis
이병도,Lee Byung-Do 대한영상치의학회 2006 Imaging Science in Dentistry Vol.36 No.1
During the diagnostic process of the various oral and maxillofacial lesions, we should consider the following: 'When should we order diagnostic tests? What tests should be ordered? How should we interpret the results clinically? And how should we use this frequently imperfect information to make optimal medical decisions?' For the clinicians to make proper judgement, several decision making tools are suggested. This article discusses the concept of the diagnostic accuracy (sensitivity and specificity values) with several decision making tools such as decision matrix, ROC analysis and Bayesian analysis. The article also explain the introductory concept of ORAD program.