Periapical Status of endodontically Treated Teeth in Relation to The Technical Quality of The Root Filling & the Coronal Restoration

By  Ray Ha, Trope M

Date: 04/1996
Journal: JOE


Purpose:. to evaluate the relationship of the quality of the coronal restoration and of the root canal obturation on the radiographic periapical status of endodontically treated teeth.

N= 1010 endodontically treated teeth


•Teeth restored with a permanent restoration were included except teeth restored with post & core.

•Teeth were categorized according to the radiographic quality of the endodontic obturation and coronal restoration as follows:

•(1)Good endodontics (GE): All canals obturated, no voids,& obturation between 1-2 mm  short than radiographic apex.

•(2) Poor endodontics(PE): if 1 or more criteria in

(1) were not met.

•(3) Good restoration (GR): Intact radiographically. 

•(4) Poor restoration (PR): signs of overhangs, recurrent decay or open margins.

•The radiographic appearance of the apical one-third of the root and surrounding structures were then evaluated and categorized as follows: •(1) Absence of periradicular Inflammation (API): if the contours, width and structure of the PDL were normal or slightly widened if an excess of filling material was present. 

•(2) Presence of periridacular inflammation (PPI): if one or more of the criteria of success were not fulfilled

Most highlighted Results: 

-Good Restoration  – more Absence of periradicular Inflammation (API) than Good endo (GE):, 80% VS 75.7%.

-Poor Restoration  -more Presence of periridacular inflammation (PPI  than Poor Endo, 30.2% VS 48.6%.

-Good Resto + Good Endo -the highest API rate of 91.4% > than Poor Resto + Poor Endo with a API rate of 18.1% 

-Good Endo + Poor Resto – 44.1% API üPoor Endo + Good Resto – 67.6% API leading to the clinical significance


The technical quality of the coronal restoration was significantly more important than the technical quality of the endodontic treatment for apical periodontal health.