In the field of orthopaedic surgery, as well as in the specific case of Total Hip Arthroplasty (THA), radiographic evaluation is traditional and still widely used, but its interpretation is subjective, not quantitative and scarcely repeatable. By means of a simple and inexpensive system, based on commercial hardware with a 512 x 512 spatial resolution matrix and 256 levels of gray, we can now evaluate on x-ray films the effect of long term bone remodeling around hip arthroplasties. The results of Computer Aided Densitometric Image Analysis (CADIA) applied to the historical archive are burdened by a not always acceptable significance. The main noise sources, such as the variance of radiological parameters, are a serious obstacle to the densitometric use of a traditional radiological archive. An attempt to retrieve the historical archive, that is of every X-ray film obtained out of any radiological control protocol, can be carried out with the bone density ratio representation. We evaluate two different specimens with bone density ratio analysis: cementless group (96 cases) and non prosthetized femurs group (51 cases) as a control, all groups with follow-up > months. Ratios representation evidenced different behaviour among the two specimens: cementless THA clearly showed bone remodeling phenomena, which could be quantitatively evaluated.
|Translated title of the contribution||Computerized densitometric evaluation of bone remodeling in hip prosthesis|
|Number of pages||9|
|Journal||Minerva Ortopedica e Traumatologica|
|Publication status||Published - 1993|
ASJC Scopus subject areas