However , variability was substantial .
Restoration type , material s , the patient , the operator , the practice environment and type of care system appeared to influence longevity .
Objective To conduct a systematic review of the literature on the longevity of routine dental restorations in permanent posterior teeth , and to identify and examine factors influencing its variability .
Five-year findings of a multiclinical trial for a posterior composite.
This paper reports the 5-year findings of a multi clinical ( n = 11 ) trial of a posterior composite restorative .  The overall findings , based on data collected from 649 ( 68 per cent ) of the 958 restorations originally included in the study , indicate that the material evaluated satisfies established clinical requirements for posterior composites over periods of up to 5 years . Deviations in the reporting of certain elements of the data appear to have been related to local variations in method
However , variability was substantial .
Restoration type , material s , the patient , the operator , the practice environment and type of care system appeared to influence longevity .
Objective To conduct a systematic review of the literature on the longevity of routine dental restorations in permanent posterior teeth , and to identify and examine factors influencing its variability .