ABSTRACT
Objective@#To investigate the failure reasons of all-ceramic restorations fabricated with chair-side CAD-CAM technology (CEREC®) and to improve the clinical survival of all-ceramic restorations. @*Methods @#All-ceramic single-tooth restorations of CEREC® in stomatology hospital of Jiangsu province between 2013 and 2016 were summarized. By clinical examination and CEREC Biogeneric surveying, the failure reasons and related restoration types were evaluated. These results were analyzed with Chi-square test and Spearman correlation analysis. @*Results@#A total of 61 cases with restoration types of 11 inlays, 38 onlays, 2 endocrowns, and 11 all-crowns, resulted in a failure rate of 5.4% in all-ceramic single-tooth restorations in 1-4 years follow-up. The reasons for failure included ceramic fracture (n=33), debonding (n=13), tooth fracture (n=15), which attributed to thin ceramic thickness (n=27), acute line angle (n=6), insufficient enamel bulk (n=3), insufficient retention type (n=10), insufficient resistance type (n=15).@*Conclusion @# The most common reason for failure in CEREC® restorations was insufficient preparation space in occlusal surface.
ABSTRACT
Failure to primary treatment under RNTCP can be an enormous setback for the society. A record based retrospective cohort analysis of 212 patients failing primary treatment under Cat I or Cat III was done in Burdwan district of West Bengal to find the treatment outcome after re-registration under Cat II and its possible influencing factors. Retreatment of failed patients resulted in 24.06% chronicity. Important factors influencing the outcome of being failure were found to be Adolescence (AOR = 2.350; C.I. 0.660-8.281), Urban residence (AOR = 1.878; C.I. 0.705-5.002), primary categorization in Cat I versus Cat III (AOR = 5.036; C.I. 0.897-28.281), higher bacillary load at the beginning of retreatment regimen (AOR = 5.437; C.I. 0.787-37.562) and more than three weeks delay in instituting Cat II treatment (AOR = 3.550; C.I. 0.941- 13.393). 17.35% of such failed patients were still defaulters. Hence such factors may be looked into for more efficient control of Tuberculosis in our country.