So sánh phương pháp

	Xác định chiều dài ống tủy	Kỹ thuật chụp X-quang cánh cắn
Lĩnh vực	Nha khoa	Nha khoa
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1920s (radiography); 1960s (electronic)	1913 (original technique)
Người khởi xướng	Multiple innovators (radiographic and electronic methods)	Multiple innovators, formalized in 20th century
Loại	Diagnostic and measurement procedure	Radiographic examination
Công trình gốc	Ingle, J. I., Bakland, L. K., & Baumgartner, J. C. (2008). Endodontics (6th ed.). BC Decker.	Ludlow, J. B., Davies-Ludlow, L. E., Brooks, S. L., & Howerton, W. B. (2006). Dosimetry of 3 intraoral digital imaging systems. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology, 101(2), 226-234.
Tên gọi khác	working length measurement, WL determination, electronic apical locator, periapical radiography	bitewing X-ray, bitewings, posterior radiography
Liên quan	3	4
Tóm tắt	Root canal length determination (working length) is a critical procedural step in endodontic therapy that establishes the precise depth to which instrumentation, irrigation, and obturation should extend within the root canal system. Modern approaches combine electronic apical locators (EAL) with radiographic verification to accurately locate the apical foramen and establish the working length. Accurate working length determination is essential for successful endodontic treatment, preventing under-instrumentation (leaving infected material) and over-instrumentation (causing periapical inflammation).	Bitewing radiography is a standard intraoral radiographic technique that captures the coronal portions of both maxillary and mandibular teeth in a single image, with the patient biting on a film holder or digital sensor. Introduced in the early 20th century and formalized as a diagnostic standard, bitewing radiographs are the primary image type for detecting approximal caries, monitoring alveolar bone level for periodontal disease assessment, and evaluating dental restorations and radiographic density changes. Digital bitewings have reduced radiation exposure and improved image quality and archiving.