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以往投照第三磨牙象,均使用牙片直接放入口腔內,紧貼第三磨牙舌側,x綫球管中心綫負5°角通过第三磨牙远中面,相当牙根部中1╱3射入,此种方法,由于阻生齿患者炎症期,投照时口內放入牙片,痛苦极甚,有时摄得照片部位,也不滿意,或者口腔虽能张开,也因牙片的机械性刺激,引起恶心,为此經我們改进投照方法,茲介紹如下: 自制黑紙包装3.5×4.5厘米x綫胶片,使用增感板,胶片横置于口腔外,相当于下頜第三磨牙处,胶
In the past, the third tooth mover was used to cast the tooth directly into the oral cavity, close to the lingual side of the third molars, and the center line of the x-ray tube was negative 5 ° through the third molars. The middle part of the tooth root corresponded to 1 / 3 injection, this method, due to the inflammation of patients with impacted teeth, when put into the mouth of oral photos, pain is very, sometimes photos of the site is not satisfied, or although the mouth can be opened, but also because of teeth Mechanical stimuli, causing nausea, for which we improve the projection method, it is introduced as follows: Homemade black paper packaging 3.5 × 4.5 cm x-ray film, the use of sensory panels, transversal film placed in the mouth, the equivalent of mandibular Three molar teeth, plastic