Table 1 Description of the included studies

1

2020

Alrabiah et al.

RS

P

Saudi Arabia

Y

N

39.6 (31–49) N 41.4 (34–48) R

100

/ No division between anterior and posterior for this data

Moderately rough surface

Delayed loading

Both

/

Single (46 N – 52R) Splinted (68 N- 69 R)

53 (35–69) N 52 (34–70) R

2

2017

de Souza et al.

RCT

S

USA

N

Y (< 10 cigarettes)

59.2

44

9–13 N 10–12 R

Rough SLA surface

Delayed loading

Screw

/

Single

36

3

2017

Pieri et al.

RS

P

Italy

N

Y (< 20 cigarettes)

61.02 ± 9.76 N 56.77 ± 9.86 R

239

/ Data not included

/

Delayed loading

Both

Full-zirconia, zirconia– ceramic, metal-ceramic, and titanium-composite FPDs

Splinted

60

4

2019

Al-Shibani et al.

RS

P

Saudi Arabia

Y

N

41.6 (30–50)

86

/ Data not included

/

Delayed loading

/

/

NA

36

5

2003

Garlini et al.

RS

P

Italy

N

Y (< 10 cigarettes)

24–75

115

/ No division between NDI, RDI and WDI for this data

Osseotite surface

Delayed loading

Screw

Metal-ceramic (single prosthesis and FPP) and acrylic resin with a metal framework (full-arch)

Data not specified (both single both splinted)

60

6

2014

Mangano et al.

PS

P

Italy

N

Y

49.1 ± 11.5 (24–74)

101

/ No division between NDI, RDI and WDI for this data

Rough surface

Delayed loading

Cemented

Metal-ceramic

Single

120

7

2006

Romeo et al.

RS

P

Italy

N

Y (< 10 cigarettes)

55.8 (21–74)

254

27–48 N 82–97 R

Titanium-Plasma Spray (TPS) surface

Delayed loading

Both

/

Single (23 N – 50 R)

Splinted (99 N – 158 R)

84