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박시승,김평식,황호길 朝鮮大學校 口腔生物學硏究所 2001 口腔生物學硏究 Vol.25 No.1
Vertical root fracture is defined as a longitudinal fracture confined to the root that usually begins on the internal canal wall and extends outward to the root surface. Diagnosis was obtained with the use of clinical, fiberoptic and disclosing solution examinations. Although many treatment procedures have been described in the literature, most reported data indicate that no satisfactory solution has been achieved. These two cases described a different treatment procedure using re-attachment and intentional replantation method. This techniqe was consisted of extraction of all fractured segments, recementation of both segments and replantation. Intentional replantation is an accepted endodontic procedure for treatment of teeth in which conventional surgical endodontic treatment is contraindicated. The common failure in intentional replantation is a root resorption. The favorable results obtained might be attributed to the preservation of the vitalit of the periodontal ligament: the absence of damaging pressure during extraction:?? minimal extraoral treatment time: the use of nonrigid splinting: and immediate repair of the perforation site. Although, we have not achieved our anticipated results, further study of the problem is necessary and essential for treating the vertical root fracture.
디지털방사선사진과 구내방사선사진의 인접면 인공우식진단능에 관한 비교연구
조영곤,박시승 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.2
Conventional intraoral radiography continues to be the most widely used image modality for the diagnosis of dental caries. But. conventional intraoral radiography has several shortcomings, including the difficultly of exposing and processing intraoral film of consistently acceptable quality. In addition, radiographic retaking that was the result of processing errors. may result in increased discomfort and radiation dose to the patient. Rcently, various digital radiographies substitute for conventional intraoral radiography to overcome these disadvantages. The advantages of digital radiography are numerous. One of advantages is the elimination of processing errors. In addition, the radiation dose for digital system is approximately 20% to 25% of that required for conventional intraoral radiography. Another potential advantage of digital imaging is the ability to perform image quality enhancements such as contrast and density modulation. which may increase diagnostic accuracy. The purpose of this study was to compare the diagnostic ability of artificial proximal defects to conventional intraoral radiography, direct digital image(CDX2000HQ®) and indirect digital image(Digora®). Artificial defects were made in proximal surfaces of 60 extracted human molars using #1/2, #1, #2 round bur. Five dentists assessed proximal defects on conventional intraoral radiography, direct digital image(CDX2000HQ®) and indirect digital image(Digora®). ROC(Receiver Operating Characteristic) analysis and Two-way ANOVA test were used for the evaluation of detectability, and following results were acquired. 1. The mean ROC area of conventional intraoral radiography, direct digital image(CDX2000HQ®) and indirect digital image(Digora®) were 0.6766, 0.7538, 0.6791(Grade Ⅰ), 0.7176, 0.7594, 0.7361(Grade Ⅱ), and 0.7449, 0.7608, 0.7414(Grade Ⅲ), respectively. 2. Diagnostic ability of direct digital image was higher than other image modalities. But, there was no statistically significant difference among other imaging modalities for grade Ⅰ, Ⅱ, Ⅲ lesion(p>0.05). In conclusion, when direct and indirect digital system are comparable with conventional intraoral radiography, these system may be considered an alternative of conventional intraoral radiography for the diagnosis of proximal surface caries.