Debris isolating prosthetic hip joint

In a prosthetic hip assembly of the type including an acetabular component comprising a generally hemispherical exterior surface and a generally hemispherical interior surface, said interior surface defining a first articulating surface, and a continuous annular rim surface extending radially from said interior surface to said exterior surface, and a femoral component comprising an elongated stem, a neck extending from said stem, and a spherically shaped head coupled to a free end of said neck, said head defining a second articulating surface, the improvement therewith comprising:

• first surface treatment means forming a portion of said continuous annular rim surface for promoting the attachment of a fibrous tissue to said acetabular component, said first surface treatment means extending entirely along said continuous annular rim surface;
• and
• second surface treatment means for promoting the attachment of the fibrous tissue to said femoral component, said surface treatment means forming a continuous annular portion of a surface of said femoral component which is located adjacent to said neck, wherein said surface having said second surface treatment means faces substantially toward said spherically shaped head and said first surface treatment means being in opposing relationship with said second surface treatment means when said components are implanted into selected bones of a patient, wherein the fibrous tissue attaching to said first and second means forms a sealed capsule between said components, whereby said sealed capsule substantially prevents wear debris, created within said capsule by said first and second articulating surfaces rubbing against one another, from migrating out of said sealed capsule into interfaces between said components and said selected bones and substantially prevents metal and cement debris, remaining at the interfaces between said components and said selected bones after said implantation from migrating into said sealed capsule and toward said first and second articulating surfaces.