Abstract
PURPOSE
MATERIALS AND METHODS
RESULTS
Figures and Tables
Fig. 2
Distribution of crowns towards jaw and region. The mosaic plot shows the distribution of crowns to the upper and lower jaw as well as to the anterior and posterior region. Crowns that experienced adverse events are shaded and their share is noted in brackets (%). 62% of all crowns are in the upper jaw and 53% of all crowns are in the anterior region.
![jap-8-194-g002](/upload/SynapseData/ArticleImage/0170jap/jap-8-194-g002.jpg)
Fig. 3
Estimations of an average survival rate. The Kaplan-Meier survivor shows two curves with 95% confidence intervals. A censoring event was an observation classified as "failure" (SAE or removal). The red line estimates the survival of all crowns in the observed cohort, and the blue line estimates it from a set of 45 randomly drawn (one out of each patient) crowns. The remaining "crowns at risk" are noted on top axis. The estimation at 24 months was favored as cut-off to average both estimations, because after 28 months less than half of the cohort was still at risk.
![jap-8-194-g003](/upload/SynapseData/ArticleImage/0170jap/jap-8-194-g003.jpg)
Fig. 4
Estimations of average complication rate. Estimations of average complication rate: the failing function shows two curves with 95% confidence intervals. A censoring event was the observation of "any need for intervention". The red line estimates the complication rate of all crowns within the cohort, and the blue line estimates from a set of 45 randomly drawn (one out of each patient) crowns. The remaining "crowns at risk"are noted on the top axis.
![jap-8-194-g004](/upload/SynapseData/ArticleImage/0170jap/jap-8-194-g004.jpg)
Fig. 5
Estimations for the complication rate with respect to anterior and posterior. Estimations for the complication rate with respect to anterior and posterior: the failing function shows two curves with 95% confidence intervals. A censoring event was the observation of "any need for intervention". The red line estimates the complication rate of all crowns within the cohort inserted to anterior, and the blue line estimates all crowns inserted to posterior. The remaining "crowns at risk" are noted on the top axis. At 24 months, the log rank test shows no statistical significant difference between both estimations.
![jap-8-194-g005](/upload/SynapseData/ArticleImage/0170jap/jap-8-194-g005.jpg)
Fig. 6
Estimations for the complication rate of all crowns with respect to root canal filled and vital teeth. The failing function shows two curves with 95% confidence intervals (CI). A censoring event was observation of "any need for intervention". The red line estimates the complication rate of all crowns on vital teeth, and the blue line estimates all crowns on root canal treated (RCT) teeth. The remaining "crowns at risk" are noted on the top axis.
![jap-8-194-g006](/upload/SynapseData/ArticleImage/0170jap/jap-8-194-g006.jpg)
Table 1
Overview of patients and restorations that were excluded from evaluation due to comparability (violation of standard operating protocol)
![jap-8-194-i001](/upload/SynapseData/ArticleImage/0170jap/jap-8-194-i001.jpg)
Table 2
Classification, definition, and statistical usage of observations within the follow-up examinations
![jap-8-194-i002](/upload/SynapseData/ArticleImage/0170jap/jap-8-194-i002.jpg)
Table 3
Overview of the rating of all observed crowns in time intervals of one year
![jap-8-194-i003](/upload/SynapseData/ArticleImage/0170jap/jap-8-194-i003.jpg)
The number of crowns removed due to failure within the time interval is shown in column 2. The percentage of observed crowns in the interval related to the whole cohort or removal is shown in column 3. The percentage of the CDA-criteria for marginal fit, marginal discoloration, caries at margin, and color refers to all crowns observed in the interval. Data of criteria, which were not ascertained during clinical observation, is listed also in % as "N".