Patient Name: Mr. Ren sex: male age: 25
Visiting Time: 2008-3-30
Brief Introduction of Case: left-upper central incisor was broken by trauma with exposed dental nerve, which has been treated with complete dental canal treatment; right-upper central incisor was broken by trauma without exposed dental nerve, which has no symptoms of pulpitis and has been treated with nerve retention.
All Treatment Time: 2 hours
Course of Treatment: without teeth grinding, teeth piling, anaesthetic and pain.

Patient Name: boy Yang sex: male age: 10 place of residence: Shandong
Brief Introduction of Case: upper anterior tooth was broken by trauma without exposed dental nerve.
Course of Treatment: without teeth grinding, teeth piling, anaesthetic, any metal retainer and pain.

Patient Name: Mr. Liu sex: male age: 39 occupation: engineer working place: Beijing
Brief Introduction of Case: third of the crown of left-upper incisor was broken
All Treatment Time: 1 hour
Course of Treatment: without teeth grinding, teeth piling, anaesthetic, any metal retainer; painless during entire course of treatment.