Dental Radiology chapter 5 (Review) Questions with Complete Solutions

Dental Radiology chapter 5 (Review) Questions with Complete Solutions What happens when the X-ray beam is angled incorrectly during a dental radiograph? It can result in image distortion, causing inaccurate diagnosis. Why is the correct film placement essential in dental radiography? Proper placement ensures the area of interest is captured clearly, reducing the need for retakes. What effect does an increase in the focal spot size have on the radiographic image? A larger focal spot increases the blurriness of the image, reducing sharpness. How does the use of a high-speed film or digital sensor impact patient exposure? It reduces the amount of radiation needed to capture a clear image, making the procedure safer. What can happen if the X-ray machine is not properly calibrated? 2 Inaccurate calibration can lead to inconsistent image quality and increased radiation exposure to the patient. Why is it important to regularly check the lead apron for damage? Damaged lead aprons may not provide full radiation protection, potentially exposing the patient to unnecessary radiation. What role does the phosphor plate play in digital radiography? It captures the X-ray image and then is scanned to produce a digital image that can be viewed on a computer. How does scatter radiation affect the quality of a dental radiograph? It can degrade image quality by adding unwanted exposure to the film, reducing contrast and sharpness. What is the advantage of using a rectangular collimator instead of a circular one? A rectangular collimator reduces the amount of tissue exposed to radiation, making the process safer for the patient. 3 Why is the paralleling technique preferred over the bisecting angle technique? It provides more accurate and less distorted images, improving diagnostic quality. What is the purpose of a radiographic exposure chart? To provide guidelines for the proper exposure settings based on factors like patient size and image quality requirements. How does patient motion during an X-ray exposure affect the final image? It causes blurring, making the image less useful for diagnosis and requiring additional exposure for retakes. What is the function of the sensor or film holder in dental radiography? To keep the film or sensor stable and in proper alignment during exposure, ensuring accurate images. Why do we use bite-wing radiographs in dentistry? Bite-wing radiographs are used to detect interproximal cavities and monitor bone levels between teeth. 4 How does the quality of the X-ray machine affect diagnostic radiographs? A well-maintained X-ray machine produces clearer, more detailed images and reduces radiation exposure to the patient. What is the significance of using proper exposure time in dental radiography? Correct exposure time ensures sufficient radiation to capture a clear image without overexposing the film or sensor. How can exposure settings affect the contrast of a dental radiograph? Higher kVp settings reduce contrast, while lower kVp settings increase contrast, impacting the visibility of fine details.