Table 2. Evaluation of the restorations according to FDI criteria used in this study.

	Conventional resin (Filtek Z350 XT)			Bulk-fill resin (Filtek TM Bulk Fill)
	Baseline	6-month	1 year	Baseline	6-month	1 year
Surface gloss (1/2/3/4/5)	40/30/0/0/0	33/34/0/0/0	17/33/1/0/0	46/24/0/0/0	37/29/0/0/0	25/26/0/0/0
Surface staining (1/2/3/4/5)	70/0/0/0/0	67/0/0/0/0	51/0/0/0/0	69/1/0/0/0	65/1/0/0/0	49/2/0/0/0
Marginal staining (1/2/3/4/5)	70/0/0/0/0	65/2/0/0/0	49/2/0/0/0	68/2/0/0/0	63/3/0/0/0	48/3/0/0/0
Anatomical form (1/2/3/4/5)	49/21/0/0/0	46/21/0/0/0	27/21/3/0/0	58/12/0/0/0	50/16/0/0/0	33/17/1/0/0
Fracture/ retention (1/2/3/4/5)	70/0/0/0/0	67/0/0/0/1	51/0/0/0/2	70/0/0/0/0	65/1/0/0/1	51/0/0/0/1
Marginal adaptation (1/2/3/4/5)	70/0/0/0/0	67/0/0/1/1	49/2/0/1/1	69/1/0/0/0	62/4/0/2/1	49/2/0/4/1
Recurrence of caries (1/2/3/4/5)	70/0/0/0/0	67/0/0/0/0	51/0/0/0/1	70/0/0/0/0	66/0/0/0/0	51/0/0/1/0

The numbers separated by slash represent the number of evaluated restorations that received the respective score: 1. clinically very good; 2. clinically good; 3. clinically satisfactory; 4. clinically unsatisfactory; 5. clinically poor