System of the present invention is in relation to a kind of full artificial hip joint structure comprising an acetabular cup and a femoral neck. Acetabular cup has a central point, a central axis, a hemisphere inner surface and an inner lining surface； Central point between hemisphere inner surface have a femoral head radius ri； There is a liner angle between inner lining surface and central axis. Femoral neck has a femoral head and a neck of femur, and femoral head sets what hemisphere inner surface and can opposite sliding； Femoral head has a femoral head diameter 2ri； Neck of femur has a femur axis and a recess diameter Dn； Angle between femur axis and central axis is defined as the unilateral amplitude of oscillation； Recess diameter Dn need to meet 2ri/Dn2.5. The whats unilateral side amplitude of oscillation such as the liner angle system at any place of acetabular cup makes contacting selected from one of line contact, face contact between neck of femur and inner lining surface. Therefore this case has both the advantages that can reducing the generation for hitting particle in hip joint activity, leading to the risk of the dislocation of hip joint because of excessive moment loading with reduction. 本發明係有關一種全人工髖關節結構，其包括一髖臼杯及一股骨頸部。髖臼杯具有一中心點、一中心軸線、一半球內表面及一內襯表面；中心點至半球內表面之間具有一股骨頭半徑ri；內襯表面與中心軸線之間具有一內襯角。股骨頸部具有一股骨頭及一股骨頸，股骨頭設於半球內表面並可相對滑動；股骨頭具有一股骨頭直徑2ri；股骨頸具有一股骨軸線及一頸部直徑Dn；股骨軸線與中心軸線間之夾角被定義為單側擺幅；頸部直徑Dn需符合2ri/Dn2.5。髖臼杯之任一處之內襯角係等於單側擺幅，使股骨頸與內襯表面之間之接觸選自線接觸、面接觸其中之一。故，本案兼具可在髖關節活動時減少撞擊碎粒之產生，與降低因過大之力矩作用而導致髖關節脫位之風險等優點。
