Toothache is a common symptom in oral disease and constitutes two thirds of patients' chief complaints, and 60% among toothache cases attributes to pulp pathological changes. Furthermore, the treatment itself(including local anesthetic injection) could revoke ache, so many patients feel anxious and dreadful to teeth treatments. Therefore, the problem of analgesia in tooth and pulp treatments is one of attention focuses and main research title for all dentists all over the world, which is badly needed to sol...
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