Fretting Failure of Dental Implant–Bone Interface - Dental Biotribology - page 157

Fig. 7.9 Local observation of cortical bone surface, normal load: 300 N
Fig. 7.10 Photographs and schematics of the four pattern cracks. Normal load: 300 N, TA2 ball
( Φ = 10 mm)
at Haversian canal. Possibly the Haversian system released and interrupted the
stress for their hollow structure. However, such a structure is usually so weak that it
generates cracks under stress at the same time [ 17 ]. Cracks cross layers of bone with
the dissipation of energy, which stop when energy is exhausted. The third pattern