Tsuzuki Tamiyuki, Ueno Asao, Kajiwara Masahiro, Hanaoka Yoichi, Uchiyama Hideki, Agawa Yukihisa, Takagi Tetsuya, Sato Yoshinobu
Center of Legal Medicine of Dentistry, The Nippon Dental University, School of Dentistry at Tokyo, Japan.
Leg Med (Tokyo). 2002 Mar;4(1):40-6. doi: 10.1016/s1344-6223(01)00049-9.
This study was performed to assess the effectiveness of an intraoral CCD camera for dental examinations when sufficient jaw opening or adequate lighting cannot be obtained. A handpiece-type intraoral CCD camera (Crystal Cam; GC Corp., Japan) was used for the study. Because a full view taken by the intraoral CCD camera covers only one or two teeth, all the teeth were individually photographed and a view of the dentition assembled on a personal computer. Assuming that the jaw could not be opened widely enough to inspect an occlusal view, a dry skull and a volunteer were restricted to open the mouth and all the teeth were photographed with an intraoral CCD camera. These were compared to intraoral photographs taken by the conventional method using a single-lens reflex camera and mirror. When the intraoral CCD camera was used to photograph teeth, the color tone of metal restorations could be readily identified, but special care was required to identify carious lesions, discoloration of tooth structure, and esthetic restorations. The dentition photographs assembled from the original intraoral CCD images were transferred via the Internet as e-mail attachment files to allow preparation of the dental chart at the destination. Based on the transferred images, it was possible to prepare a dental chart agreeing satisfactorily with actual oral conditions. The easy transfer of digital images provides various advantages in evaluating and discussing certain cases in cooperation with other forensic odontologists via the Internet. The camera may be made more effective or useful through improvement of the tip portion of the camera and the entire system to achieve a more compact design and better portability.
本研究旨在评估在无法获得足够的张口度或充足照明时，口腔内电荷耦合器件（CCD）相机用于牙科检查的有效性。本研究使用了一种手持型口腔内CCD相机（Crystal Cam；日本GC公司）。由于口腔内CCD相机拍摄的全景仅覆盖一到两颗牙齿，因此对所有牙齿进行了单独拍摄，并在个人计算机上组装成牙列视图。假设无法充分张开嘴巴以检查咬合面视图，则对一个干燥颅骨和一名志愿者限制其张口，并用口腔内CCD相机对所有牙齿进行拍摄。将这些照片与使用单镜头反光相机和镜子通过传统方法拍摄的口腔内照片进行比较。当使用口腔内CCD相机拍摄牙齿时，可以很容易地识别金属修复体的色调，但识别龋损、牙齿结构变色和美观修复体时需要格外小心。从原始口腔内CCD图像组装而成的牙列照片通过互联网作为电子邮件附件文件传输，以便在目的地制作牙科图表。基于传输的图像，可以制作出与实际口腔状况令人满意相符的牙科图表。数字图像的轻松传输在通过互联网与其他法医牙科学专家合作评估和讨论某些病例时具有多种优势。通过改进相机的尖端部分和整个系统，使相机更紧凑、便携，可能会使其更有效或更有用。
