Table 2 Peri-implant bone level changes by implant type and loading protocol.

From: Prospective controlled study comparing 5.5-mm long implants with longer implants to support fixed partial prosthesis in the premolar-molar regions: 12 months follow-up

Characteristic

CONTROL N = 51

TEST N = 51

Marginal bone level at loading (mesial)

  

 Mean

−1.2

−0.7

 Median

−1.1

−0.7

 Min–Max

−4.0 to 0.7

−3.7 to 0.8

Marginal bone level at loading (distal)

  

 Mean

−0.3

−0.8

 Median

−0.3

−0.8

 Min–Max

−2.1 to 1.0

−2.8 to 0.6

Marginal bone level at 1 year (mesial)

  

 Mean

−0.8

−0.4

 Median

−1.0

−0.4

 Min–Max

−3.7 to 1.2

−2.4 to 0.8

Marginal bone level at 1 year (distal)

  

 Mean

0.0

−0.7

 Median

0.0

−0.7

 Min–Max

−1.8 to 1.8

−1.9 to 0.6

Change in marginal bone level (mesial)

  

 Mean

0.4

0.2

 Median

0.3

0.2

 Min–Max

−1.3 to 2.9

−0.7 to 1.6

Change in marginal bone level (distal)

  

 Mean

0.3

0.1

 Median

0.3

0.2

 Min–Max

−1.3 to 1.5

−1.2 to 1.4

Immediate loading

Change in marginal bone level (mesial)

  

 Mean

0.4

0.2

 Median

0.3

0.2

 Min–Max

−0.6 to 2.9

−0.7 to 1.6

Change in marginal bone level (distal)

  

 Mean

0.4

0.2

 Median

0.3

0.2

 Min–Max

−1.3 to 1.5

−0.8 to 1.4

Delayed loading

Change in marginal bone level (mesial)

  

 Mean

0.3

0.1

 Median

0.3

0.0

 Min–Max

−1.3 to 2.7

−0.3 to 1.2

Change in marginal bone level (distal)

  

 Mean

0.2

−0.1

 Median

0.3

−0.2

 Min–Max

−1.0 to 1.1

−1.2 to 0.9