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Updated: Mar 29, 2026
An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
Published on: February 10, 2014
Establishment of a new pull-out strength testing method to quantify early osseointegration-An experimental pilot
J Nonhoff1, T Moest2, Christian Martin Schmitt2
1DENTSPLY Implants Manufacturing GmbH, Mannheim, Germany.
Objectives:
The animal study aims to evaluate a new experimental model for measuring sole the influence of the surface characteristics independent from implant macro-design on the level of osseointegration by registering the pull-out strength needed for removal of experimental devices with different surfaces from artificial defects.
Material And Methods:
Seventy-two test bodies (36 with the FRIADENT(®) plus surface, 36 with the P15/HAp biofunctionalized surface) were inserted in six adult domestic pigs with artificial calvarial defects. The experimental devices were designed to fit in the defects leaving a gap between the test body and the local bone. After 21 days of healing, the animals were sacrificed and the test bodies were pulled out with a standardised reproducible pull-out device measuring the pull-out strength. The pull-out strength for both groups was compared.
Results:
Twenty-one days after insertion a mean force of 412 ± 142 N for the P15/HAp group and 183 ± 105 N for the FRIADENT(®) plus group was measured for the removal of the specimens from the calvarial bone. The difference between the groups was statistically significant (p < 0.0001).
Conclusion:
The experimental set-up seems to be a suitable method when measuring the impact of implant surfaces on the early stage of osseointegration.
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