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.