An association between the kind of complications and different types of restorations could not be established .
Nevertheless , a relatively high failure rate due to caries and ceramic fractures was noted
OBJECTIVE The aim of this study was to identify if different types of indirect restorations used for single teeth had different biological and technical complications , as well as survival rates .
Two-year clinical evaluation of direct and indirect composite restorations in posterior teeth.
STATEMENT OF PROBLEM Few long-term clinical studies have reported data of modern posterior composites as direct and indirect restorations . PURPOSE This prospect i ve , long-term clinical trial ( 1 ) evaluated direct and indirect composite restorations for clinical acceptability as posterior restoratives in single or multisurface carious teeth and ( 2 ) provided a survey on the 2-year results . MATERIAL AND METHODS Nine dental students placed 88 composite restorations ( Tetric , blend-a-lux , Pertac-Hybrid Unifil ) , 43 direct composite restorations and 45 indirect inlays , under the supervision of an experienced dentist . The first clinical evaluation was performed 11 to 13 months after placement by 2 other experienced dentists , using modified USPHS criteria . A second follow-up of 60 restorations took place within 20 to 26 months after placement . RESULTS A total of 93 % of indirect and 90 % of direct composite restorations were assessed to be clinical ly excellent or acceptable . Two restorations ( 1 indirect composite inlay and 1 margin of a direct composite restoration )  failed during the second year because of fracture . Indirect inlays demonstrated a significantly better " anatomic form of the surface " than direct composite restorations . Premolars revealed a significantly better margin integrity and postoperative symptoms than molars . CONCLUSION Posterior composite restorations provided a satisfactory clinical performance over a 2-year period when placed by relatively inexperienced but supervised students
An association between the kind of complications and different types of restorations could not be established .
Nevertheless , a relatively high failure rate due to caries and ceramic fractures was noted
OBJECTIVE The aim of this study was to identify if different types of indirect restorations used for single teeth had different biological and technical complications , as well as survival rates .