Table 2 Results of individual studies

Chandra et al. 2019 [10]

a) BR group: 596.2 ± 115.2 HU

b) SB group: 659.6 ± 133.8 HU

*(p < 0.001)

a) BR group: 3.09 mm (buccal) and 3.31 mm (lingual)

b) SB group: 1.90 mm (buccal) and 1.99 mm (lingual)

*(p < 0.001)

–

–

a) BR group: 88,23%

b) SB group: 100%

Implant Stability Quotient (ISQ)

a) BR group: 61.60 ± 8.9

b) SB group: 45.02± 6.33

*(p < 0.034)

Histological analysis

a) BR group: 50.39% ± 11.96%

b) SB group: 38.91% ± 12.22%

*(p < 0.001)

a) BR group:

-2 IOI and BR failure

-1 dehiscence

-3 swelling

b) SB group:

-1 dehiscence

-3 swelling

Flanagan et al. 2016 [17]

–

–

–

–

100%

–

No complications

Fukuda et al. 2005 [18]

–

–

–

–

92.3%

Radiological stability between baseline and 1.3 years (periapical Rx)

1 IOI and BR failure

Giesenhagen et al. 2018 [19]

–

–

–

–

100%

Radiological stability between baseline and 6 m (panoramic Rx)

No complications

Giesenhagen et al. 2019 [20]

–

–

–

–

100%

Clinical and radiological stability between baseline and 2 year (panoramic Rx)

–

Giraddi et al. 2017 [21]

–

-Mesial bone gain: 3.70 ± 1.10 mm

-Distal bone gain: 3.69 ± 1.10 mm

-Mesial bone resorption: 0.73 ± 0.38 mm

-Distal bone resorption: 0.78 ± 0.23 mm

–

93.33%

–

1 IOI and BR failure

Miller J. 2019 [22]

–

–

–

–

100%

Radiological stability between baseline and 6 m (periapical Rx)

ISQ 68 at 6 m

No complications

Nord et al. 2019 [23]

–

–

–

0.43 mm

97.5%

–

2 IOI failure

Omara et al. 2016 [24]

-Mesial aspect: 420.43 HU

-Distal aspect: 325.28 HU

13.07 ± 1.37 mm

0.26 ±0.86 mm

–

100%

–

2 transient numbness of lower lip

Peñarrocha et al. 2005 [25]

–

–

–

–

100%

Radiological stability between baseline and 2 years (panoramic Rx)

No complications

Rizzo et al. 2017 [26]

–

–

–

z

100%

Radiological stability between baseline and 6 years (periapical Rx)

No complications

Sindel et al. 2018 [27]

-

–

–

1.77 mm

90%

–

1 IOI and BR failure

Stevenes et al. 2010 [28]

–

–

–

–

100%

–

No complications

Tekin et al. 2011 [29]

–

–

–

–

100%

Radiological stability between baseline and 6 years (periapical Rx)

No complications

Wychowansky et al. 2020 [11]

–

a) BR group: 4.3 ± 1.3 mm

b) XG group: 4.4 ± 1.5 mm

–

–

a) BR group: 86,66%

b) XG group: 96,66%

Implant stability at baseline (periotest)

a) BR group: − 3.2 ± 1.3

b) XG group: − 1.2 ± 1.6

*(p<0,005)

Implant stability at 24 m (periotest)

a) BR group: − 3.7 ± 1.1

b) XG group: − 3.6 ± 1.2

*(p < 0.005)

a) BR group:

-4 IOI failure

b) XG group:

-1 IOI failure

Yuce et al. 2019 [12]

–

–

–

–

100%

–

1 BR failure (defect repaired and IOI osseointegrated)