Table 6 Marginal bone loss on different follow-up times

2-Year bone loss (mean ± SD)

Mesial

0.433 ± 0.067

0.428 ± 0.077

0.438 ± 0.110

0.944

Distal

0.395 ± 0.058

0.395 ± 0.093

0.395 ± 0.075

0.993

Cumulative

0.414 ± 0.055

0.411 ± 0.076

0.417 ± 0.081

0.962

7-Year bone loss (mean ± SD)

Mesial

0.479 ± 0.072

0.446 ± 0.090

0.510 ± 0.113

0.662

Distal

0.516 ± 0.053

0.520 ± 0.065

0.512 ± 0.084

0.945

Cumulative

0.498 ± 0.057

0.483 ± 0.064

0.511 ± 0.094

0.806

2- to 7-year bone loss (mean ± SD)

Mesial

0.046 ± 0.041

0.018 ± 0.072

0.073 ± 0.045

0.513

Distal

0.121 ± 0.049

0.125 ± 0.088

0.117 ± 0.052

0.935

Cumulative

0.084 ± 0.039

0.072 ± 0.071

0.095 ± 0.038

0.768