Abstract: In order to resolve the biological sealing of the percutaneous devices for a long time, porous titanium with three-dimensioned scaffold and suitable surface micropores were chosen for
fixation the subcutaneous soft tissues. Bone-like apatite was firstly precipitated on the surface of the porous Ti in vitro, and the bare surface
as control. All of the samples were implanted into the back of the rabbits subcutaneously. At 40 days and 70 days postoperation, the samples with the
surrounding soft tissues were harvested and experienced biomechanical tensile testing. After that, the tensile testing sections were observed by SEM-EDX
to analyze the situations of the tissues contacted with the different surface of the materials. The results demonstrate that all of tensile strength
of the bone-like apatite coated porous titanium is bigger than that of the control group, and the bonding state at the interface of the materials/tissue
is firmer than that of the control. When the samples implanted in~ vivo, the bone-like apatite coating precipitated in advance in~ vitro is efficient to the formation of the active cell/materials
interface, which is beneficial for the ingrowth of the fibrous tissue and formation of the tight bonding between the tissues and materials.

Key words: porous titanium, bone-like apatite, tensile strength, subcutaneous fixation