@article{oai:mdu.repo.nii.ac.jp:00001048,
 author = {窪, 泉 and 窪, 綾子 and 笠原, 悦男 and 安田, 英一},
 issue = {3},
 journal = {松本歯学},
 month = {Dec},
 note = {application/pdf, In determining the length of a root canal by electrical means, a mouth angle electrode is placed on the buccal mucous membrane. This device has been marketed; it consists of a square stainless steel plate (2.0×2.5cm, 5cm^2) and a wire spring with a diameter of 0.8mm.. Sometimes it causes discomfort in the patient's mouth and mucous membrane covering the mandible due to the wire or corner of the electrode. The mouth angle electrode was improved by modifying the shape from square to round without altering its area, and by changing the wire spring to a leaf spring.},
 pages = {323--326},
 title = {口角導子の改良について},
 volume = {17},
 year = {1991}
}