[Use of densitometric examination in evaluation of cementless hip endoprosthesis]. / Zastosowanie badania densytometrycznego w ocenie endoprotezoplastyki bezcementowej stawu biodrowego.

ABSTRACT

Five patients underwent densitometry in order to establish bone mineral content (BMC) and bone mineral density (BMD) around Parhofer-Mönch total hip components. The measurements were taken with LUNAR DPX unit twice 11 days and 6 month postoperatively. "Orthopedic" software was employed to analyze them. Bone around the stem was evaluated with "auto analysis" option and relation to Gruen zones; "manual analysis" was used in modified DeLee and Charnley zones around the acetabulum. After six months BMC and BMD decrease in all Gruen zones was noted. In DeLee and Charnley zones BMC and BMD decreased in field 1 but slightly increased in field 2 and 3. The authors consider densitometry as important tool for monitoring and documentation of postoperative bone reaction to the implanted endoprosthesis.