Table 17.

Smoking to survival rate

	Number of patients	Number of implant placed	Patient level (number of patient failure)	p value	Implant level (number of implant failure)	p value
Maxilla
Smoker	104	446	96.2% (4)	0.86	97.3% (12)	0.037*
Non smoker	203	878	96.6% (7)		98.9% (10)
Mandible
Smoker	96	392	94.8% (5)	0.019*	98.7% (5)	0.065
Non smoker	158	648	99.4% (1)		99.7% (2)
Total
Smoker	200	838	95.5% (9)	0.13	97.9% (17)	0.0086**
Non smoker	361	1526	97.8% (8)		99.2% (12)

*p < 0.05, **p < 0.01: Chi-square test