Biomaterial Database

Aseptic loosening of cement-anchored total hip replacements. 1982

G Aldinger, and J Gekeler

The special conditions contributing to the loosening of 61 hip prostheses were studied and compared with 325 clinical and roentgenologically intact total hip replacements. The loosening rate rose sharply after the 6th postoperative year. One third of the artificial joints examined showed signs of loosening after the 9th year. The average loosening rate was 15.8% after 5.8 years. The condition of the bony bed apparently plays an important role, both qualitatively and quantitatively, in the success of the implant. The operative procedure is of equal importance. Deep fraising of the acetabulum, removal of insufficient amounts of cancellous bone from the proximal femur and inadequate embedding of the prosthesis stem, implantation of the stem in varus, and the use of long-neck femoral head prostheses are all factors which increase the risk of loosening. Ultimately, it is the sum of these loosening factors including the biological reaction of the tissue to the biomechanical and biochemically active foreign body which, depending on the period of influence, leads to prosthesis loosening. It is imperative that the patient's lifestyle be adjusted accordingly since external weight-bearing stress also affects durability of the prosthesis.

UI	MeSH Term	Description	Entries
D008722	Methods	A series of steps taken in order to conduct research.	Techniques,Methodological Studies,Methodological Study,Procedures,Studies, Methodological,Study, Methodological,Method,Procedure,Technique
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D010014	Osteolysis	Dissolution of bone that particularly involves the removal or loss of calcium.	Osteolyses
D011183	Postoperative Complications	Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery.	Complication, Postoperative,Complications, Postoperative,Postoperative Complication
D004868	Equipment Failure	Failure of equipment to perform to standard. The failure may be due to defects or improper use.	Defects, Equipment,Device Failure,Failure, Equipment,Malfunction, Equipment,Medical Device Failure,Misuse, Equipment,Device Failure, Medical,Device Failures, Medical,Failure, Medical Device,Failures, Medical Device,Defect, Equipment,Device Failures,Equipment Defect,Equipment Defects,Equipment Failures,Equipment Malfunction,Equipment Malfunctions,Equipment Misuse,Equipment Misuses,Failure, Device,Failures, Device,Failures, Equipment,Malfunctions, Equipment,Misuses, Equipment
D005082	Physical Exertion	Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.	Physical Effort,Effort, Physical,Efforts, Physical,Exertion, Physical,Exertions, Physical,Physical Efforts,Physical Exertions
D006621	Hip Joint	The joint that is formed by the articulation of the head of FEMUR and the ACETABULUM of the PELVIS.	Acetabulofemoral Joint,Acetabulofemoral Joints,Hip Joints,Joint, Acetabulofemoral,Joint, Hip,Joints, Acetabulofemoral,Joints, Hip
D006622	Hip Prosthesis	Replacement for a hip joint.	Femoral Head Prosthesis,Femoral Head Prostheses,Hip Prostheses,Prostheses, Femoral Head,Prostheses, Hip,Prosthesis, Femoral Head,Prosthesis, Hip
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368	Aged	A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available.	Elderly