[Hip prosthetic stem biological fixation by compound bone-cement].
Thirty rabbits were subjected to hemiarthroplasty for the right hip. The prosthetic stems were fixed by DBM + bone-cement in group I, BMG + bone-cement in group II, bone-cement only in group III, and uncemented inserting stem in group IV. They were periodically examined roentgenologically, histologically and biomechanically. Group I and II attained early mechanical fixation and new bone grew into the compound bone-cement (CBC), which was fused together with the host bed. Their shearing strength of the contact surface of CBC was increased with time. The differences between group I, II and group III, IV were obvious (P < 0.01). In later stage, group III showed bone absorption and destruction, and pseudo-membraneous tissue between the bone and cement. Group IV failed in fixation and had loosening and subsidence of the stems even in the early stage. The histology and biomechanics of compound bone-cement were also discussed.
Yang
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Orthopaedic Department, Taping Hospital, Third Military Medical College, Chongqing.
D000818:Animals; D001696:Biomechanical Phenomena; D001843:Bone Cements; D001857:Bone Matrix; D001861:Bone Regeneration; D006622:Hip Prosthesis / Q000379:methods*; D011817:Rabbits
D001843:Bone Cements