Lieberman J E, Webber R L
Oral Surg Oral Med Oral Pathol. 1978 Aug;46(2):318-27. doi: 10.1016/0030-4220(78)90208-6.
A prototype dental roentgenographic system which incorporates a tightly collimated intraoral x-ray source and an extraoral Polaroid film screen cassette was evaluated both in vitro and in vivo. Findings indicate that the detectability of artificially induced incipient enamel lesions was significantly less than that demonstrable for conventional roentgenograms produced with an extraoral source, long-cone geometry, and Kodak Ultra Speed D film. Larger lesions were found to be reliably detected by either technique. The new intraoral approach reduces the dose to the patient by possibly as much as 98 per cent and yields positive dry prints in 15 seconds. This system was clinically tested and found to be useful in endodontics and presurgical evaluation. Modifications are discussed which could reduce some of the technical problems and many of the shortcomings encountered.
对一种集成了紧密准直的口腔内X射线源和口腔外宝丽来胶片屏片暗盒的牙科X线摄影系统原型进行了体外和体内评估。结果表明，人工诱发的早期釉质病变的可检测性明显低于用口腔外源、长锥型几何结构和柯达超高速D胶片产生的传统X线片。发现两种技术均可可靠地检测出较大的病变。这种新的口腔内方法可将患者的辐射剂量降低多达98%，并能在15秒内获得显影的干片。该系统经过临床测试，发现对牙髓病学和术前评估有用。文中讨论了可减少一些技术问题和所遇到的许多缺点的改进措施。
