TABLE 8.
Comparison of annual failure and complication rates for veneered and monolithic‐reinforced glass‐ceramic implant‐supported SCs.
| Failures/Complications | n studies |
Veneered Estimated annual failure rate* (95% CI) |
n studies |
Monolithic Estimated annual failure rate* (95% CI) |
p‐value |
|---|---|---|---|---|---|
| Overall failure rate | 4 | 0.80* (0.14–4.64) | 13 | 1.02* (0.51–2.05) | p = 0.775 |
| Overall failure rate due to ceramic fractures | 5 | 0.62* (0.17–2.26) | 12 | 0.60* (0.19–1.89) | p = 0.967 |
| Failures due to core fractures | 5 | 0* (0–4.16) | 12 | 0.25* (0.03–1.81) | p < 0.0001 |
| Failures due to catastrophic veneer fractures | 5 | 0.13* (0.01–1.38) | 12 | 0.38* (0.10–1.49) | p = 0.402 |
| Failures due to abutment fractures | 5 | 0.50* (0.12–2.02) | 12 | 0* (0–7.52) | p < 0.0001 |
| Overall complication rate | 3 | 2.64* (0.94–7.44) | 7 | 1.72* (0.83–3.54) | p = 0.459 |
| Ceramic chippings | 5 | 1.00* (0.66–1.51) | 11 | 0.40* (0.10–1.55) | p = 0.196 |
| Screw loosening | 2 | 0.46* (0.21–1.01) | 9 | 0.10* (0.01–0.74) | p = 0.149 |
| Loss of retention | 3 | 0* (0–3.94) | 6 | 0.25* (0.06–1.07) | p < 0.0001 |
| Soft tissue complications | 2 | 1.59* (0.64–3.94) | 3 | 1.10* (0.41–2.92) | p = 0.527 |
| Bone loss >2mm | 1 | 0.76* (0.09–2.73) | 4 | 0.53* (0.08–3.31) | p = 0.682 |
C.I. stands for “confidence interval”
*
Based on robust Poisson regression.