IADR Abstract Archives
Re-interventions of Direct Posterior Restorations Among 25- to 30-year-olds
Objectives: This study examined the first re-intervention after placement of 2-and 3-surface direct restorations in posterior teeth among 25-30-year-olds.
Methods: Repair and replacement of restorations can account for 40-60% of restorative treatment. In the UK, every fourth teeth restored has re-intervention in the subsequent 4 years.
Our data were extracted from electronic patient files of the Helsinki City Public Dental Service (PDS). The original recordings, made at each appointment, followed strict regulations. Baseline data (in 2002) covered all 2-and 3-surface composite and amalgam restorations (n=5542) placed in posterior teeth of 25-30-year-olds and who later visited PDS at least once. Restorations were indirectly followed until end 2015; the first re-intervention indicated failure. Data included identification of teeth, size of restoration: ClassII (mesial=MO, distal=DO) and MOD, material used, dates of placement, and type of re-intervention (restoration, extraction, endodontics, other). Life-span (time to re-intervention) was calculated as days. Statistical evaluation by Chi-squared tests and ANOVA.
Results: Re-intervention (n=2445) was most frequently restoration (78%) followed by endodontics (12%) and extraction (5%). These options differed by size of restoration (p=0.02), but not by jaw, type of tooth and material. Re-intervention took place more frequently for molars than premolars (51% vs. 35%; p<0.001), for lower than upper teeth (47% vs. 42%; p<0.001) and for 3-surface than 2-surface restorations (53% vs. 43%; p<0.001).
Mean life-span of all failed restorations was 5.7y (SD=3.8); shorter for molars than for premolars (5.5y vs. 6.3y; p<0.001) and for 3- than 2-surface fillings (4.9y vs. 5.9y; p<0.001). Tertials of the life-span distribution were <3.2y, 3.3-7.5y and 7.6-13.7y. Restorative re-interventions were most common in the upper tertial; endodontics and extractions in the lowest and middle tertial (p<0.001).
Conclusions: Majority of re-interventions of direct posterior 2-and 3-surface restorations of 25-30-year-olds were in molars and involving re-restoration; endodontics or extraction was reason for shortest life-span.
Methods: Repair and replacement of restorations can account for 40-60% of restorative treatment. In the UK, every fourth teeth restored has re-intervention in the subsequent 4 years.
Our data were extracted from electronic patient files of the Helsinki City Public Dental Service (PDS). The original recordings, made at each appointment, followed strict regulations. Baseline data (in 2002) covered all 2-and 3-surface composite and amalgam restorations (n=5542) placed in posterior teeth of 25-30-year-olds and who later visited PDS at least once. Restorations were indirectly followed until end 2015; the first re-intervention indicated failure. Data included identification of teeth, size of restoration: ClassII (mesial=MO, distal=DO) and MOD, material used, dates of placement, and type of re-intervention (restoration, extraction, endodontics, other). Life-span (time to re-intervention) was calculated as days. Statistical evaluation by Chi-squared tests and ANOVA.
Results: Re-intervention (n=2445) was most frequently restoration (78%) followed by endodontics (12%) and extraction (5%). These options differed by size of restoration (p=0.02), but not by jaw, type of tooth and material. Re-intervention took place more frequently for molars than premolars (51% vs. 35%; p<0.001), for lower than upper teeth (47% vs. 42%; p<0.001) and for 3-surface than 2-surface restorations (53% vs. 43%; p<0.001).
Mean life-span of all failed restorations was 5.7y (SD=3.8); shorter for molars than for premolars (5.5y vs. 6.3y; p<0.001) and for 3- than 2-surface fillings (4.9y vs. 5.9y; p<0.001). Tertials of the life-span distribution were <3.2y, 3.3-7.5y and 7.6-13.7y. Restorative re-interventions were most common in the upper tertial; endodontics and extractions in the lowest and middle tertial (p<0.001).
Conclusions: Majority of re-interventions of direct posterior 2-and 3-surface restorations of 25-30-year-olds were in molars and involving re-restoration; endodontics or extraction was reason for shortest life-span.