title: [Clinical study on acute periapical periodontitis caused by overfilling].
abstract: OBJECTIVE
  To study the relation on overfilling with gutta-percha point or paste and acute periapical periodontitis.
  
  
  METHODS
  Collected sixty cases of acute periapical periodontitis which had been filled with gutta-percha point and paste within 1 week, and took dental radiographs. The cases that dental radiographs showed only guttapercha point was overfilling were assigned to group A (34 cases), and the cases that dental radiographs showed only paste was overfilling were assigned to group B (26 cases). The cases that dental radiographs showed both gutta-percha point and paste were overfilling were excluded. Sixty cases were divided into light group and severe group according to clinical sign. Measured gutta-percha point length or paste areas over apex. Took out the ohturation material cornpletely, adjusted occlusion when necessary and changed root canal medicament every day until clinical sign disappeared completely. Recorded the time of clinical sign disappeared completely.
  
  
  RESULTS
  In group A, gutta-percha point length over apex averaged 1.01 mm on light cases, and 1.79 mm on severe cases. In group B, the paste areas over apex averaged 2.45 mm2 on light cases, and 8.26 mm2 on severe cases. Group A had 13 light cases and 21 severe cases, and group B had 18 light cases and 8 severe cases. In group A, the average time of clinical sign disappeared completely was 3.56 days, and in group B the average time was 6.19 days. The statistical test showed there were significant differences among these four couples.
  
  
  CONCLUSIONS
  The more overfilling, the more severe clinical sign was. Clinical sign caused by gutta-percha point overfilling was more severe. The time of clinical sign which caused by gutta-percha point overfilling disappeared completely was shorter.
authors: Dept. of Stomatology, The Second People's Hospital of Cangnan County, Zhejiang Province, China.
authors: Yong-hai
authors: YH
authors: Cai
authors: Chang-shou
authors: CS
authors: Lu
authors: Ke-xiang
authors: KX
authors: Huang
authors: Huan
authors: H
authors: Chen
authors: Jian-yu
authors: JY
authors: Gao
mesh_terms: D006171:Gutta-Percha; D006801:Humans; D010485:Periapical Periodontitis; D012387:Root Canal Filling Materials; D018915:Root Canal Preparation
chemical_list: D012387:Root Canal Filling Materials; D006171:Gutta-Percha