| Author |
Type of
study |
Restorations |
Follow up
(months |
Failure
Cause |
Survival
rate |
| Beier et al [56] |
Retrospective |
470 crowns
213 onlays |
102±60
102±60 |
Bruxism
Non-vital teeth |
93.5% over 10 years
75.5% at 5 years |
| Sjogren et al [57] |
Retrospective |
75 crowns
35 onlays |
42 |
Fracture |
92% at 3.5 years |
| Sorensen et al [58] |
Prospective clinical trial |
75 crowns |
14 - 42 |
Fracture |
99% at 3 years |
| Fradeani [27] |
Cases series |
144 crowns |
6 – 68 |
Core failure |
95% at 3 years |
| Marguerito[59] |
Prospective clinical trial |
210 onlays& partial veneer crowns |
36 |
fracture |
|
|
