tailieunhanh - Diagnostic Imaging in Oral and Maxillofacial Pathology

1. Introduction During the diagnosis of oral and maxillofacial diseases, clinical and radiological data play a major role. In this region, only a good clinical diagnosis along with a radiological examination may lead to a successful diagnosis. A successful diagnosis and evaluation of clinical examination are generally up to a profound knowledge of the normal anatomy of the region. | 10 Diagnostic Imaging in Oral and Maxillofacial Pathology Hasan Ayberk Altug1 and Aydin Ozkan2 1Gulhane Military Medical Academy Department of Oral and Maxillofacial Surgery 2Diyarbakir Military Hospital Dental Service Turkey 1. Introduction During the diagnosis of oral and maxillofacial diseases clinical and radiological data play a major role. In this region only a good clinical diagnosis along with a radiological examination may lead to a successful diagnosis. A successful diagnosis and evaluation of clinical examination are generally up to a profound knowledge of the normal anatomy of the region. 2. Radiographic anatomy of oral and maxillofacial region X-rays invisible rays were discovered by W. Conrad Roentgen in 1895. They are a form of electromagnetic radiation with high energy and are part of electromagnetic spectrum. In order to create X-ray a target tissue is bombardized with energized electrons and then they are suddenly brought to rest. The entire process takes place in a small evacuated glass envelope which is called X-ray tube Whaites 2002 . Periapical radiography Periapical radiography is a projection of radiographs including interoral radiographs which depict 3-4 teeth and the tissue around them Whaites 2002 . There are two projection techniques for periapical radiography The paralleling technique Long-cone technique The periapical film is stood parallel to the long axis of the teeth and the central is aimed at the right angles of the teeth and the film Fig. 1A . The bisecting-angle technique The periapical film is stood as close as possible to the palatal lingual surface of the teeth. The film and the teeth form an angle with its apex at the point where the film is in contact with the teeth. Central ray is directed at apex of the teeth Fig. 1B White Pharoah 2004 . In order to create a high-quality radiograph the central ray beam must pass through root apex or alveolar crest. Radiolucent radioopaque images which were obtained with periapical .

• Sinh học
• Diagnostic Imaging in Oral
• Maxillofacial Pathology
• radiographic anatomy
• maxillofacial region
• Periapiclal radiography
• Anatomic landmarks of periapical radiograph