Orthopaedic Applications within Nanostructural Chemically Bonded Bioceramics - Nanostructural Bioceramics: Advances in Chemically Bonded Ceramics - page 89

10.2.2.1 Point-welding

An important aspect related to in vivo coating techniques is the
possibility with 'point-welding' [22, 23]. This is defined as the
possibility of early adaption to the implant surface and the hard
tissue by increase of the coating material volume by interaction
with the contact liquid. The coating material has a certain amount of
unreacted CBBC, and this part includes body liquid into the formed
contact zone material. This contributes to an early fill-up of the void
between the original coating material and the tissue wall. This is
illustrated in Figs. 10.2-10.4 below.

Directly after implantation

CAH-HAP layer Additional layer CA +

phosphate

Existing bone

Implant

Gap ~10 mto bone

Figure 10.2 Point-welding using unreacted CBBC material—directly after

implantation.

Ihafter implantation

First layer Additional layer has

grown

Original bone

Implant

Gap now ~5 m

Figure 10.3 Point-welding using unreacted CBBC material—one hour after

implantation.