Dentin bonding is more difficult than enamel bonding because of dentine structural characteristics .
而牙本质由于其结构不同于釉质,其粘接较釉质困难的多。
Summary : the purpose of root canal preparation is complete removal of necrotic tissue , bacteria and byproducts , dentin debris , and the establishment of an ideal shape for obturation of the root canal system .
Left untreated , the decay will worsen and destroy a tooth all the way through the outer enamel layer , through the inside dentin layer and down to the pulp or nerve of the tooth .
如果不治疗,龋坏会继续发展,穿过牙齿外面的牙釉质层,穿过牙本质层进入髓腔或者牙齿的神经。
Methods : 76 patients with dentin hypersensitivity accepted clinical observation , sodium fluoride glycerol paste was smeared on the part of dentin hypersensitivity of 101 teeth , then using 40w microwave radiate on the teeth , observing the efficacy .
If it does not increase very carefully to protect susceptible to diseases , the most common are stomatitis , oral ulcers , dental caries , gingivitis , pulpitis , periodontal abscess , alveolar abscess , dentin allergies .