title: [The management of 126 cases of posterior cracked crown of tooth and its effective observation].
abstract: OBJECTIVE
  To detect the treatment and effect of posterior cracked tooth.
  
  
  METHODS
  162 posterior cracked teeth of 158 cases, including enamel fissure and dentin fissure, all there cases undergone the synthetical treatment and follow up in different period, the longest observation period was 2.5 years.
  
  
  RESULTS
  The healing and improved rate of 162 cracked teeth 90.74%. Among cases of failure, we have founded 6 cases of acute pulpitis (3.7%), 3 cases of alveodental abscess (1.85%), 2 cases of chronic apical periodontitis (1.24%), 4 cases of tooth fracture (2.4%).
  
  
  CONCLUSIONS
  Cracked tooth was caused by multiple factors. Early diagnosis, synthetical treatment, and follow up in different period are 3 main factors in treatment.
authors.affiliation: Department Stomatology, Huasan hospital affiliated to Shanghai Medical University. Shanghai 200040, China.
authors.forename: L L
authors.initials: LL
authors.lastname: Chen