Authors:
Robertas Petrolis
1
;
2
;
Vėtra Markevičiūtė
3
;
Šarūnas Tarasevičius
3
;
Deepak Raina
4
;
Lars Lidgren
4
;
Saulius Lukoševičius
5
and
Algimantas Kriščiukaitis
1
;
2
Affiliations:
1
Department of Physics, Mathematics and Biophysics, Lithuanian University of Health Sciences, Eiveniu str. 4, Kaunas, Lithuania
;
2
Neuroscience Institute, Lithuanian University of Health Sciences, Eiveniu str. 4, Kaunas, Lithuania
;
3
Department of Orthopaedics and Traumatology, Lithuanian University of Health Sciences, Eiveniu str. 2, Kaunas, Lithuania
;
4
Faculty of Medicine, Department of Clinical Sciences Lund, Lund University, Sweden
;
5
Department of Radiology, Lithuanian University of Health Sciences, Eiveniu str. 2, Kaunas, Lithuania
Keyword(s):
Femoral Head, Implant, Dynamic Hip Screw, Point Cloud, Mathematical Morphology.
Abstract:
Per trochanteric fractures are common in an ageing population with osteoporosis and account for about half of all hip fractures. Treatment of per trochanteric fractures with extramedullary or intramedullary implants is challenging especially in unstable fractures. In order to improve the mechanical anchorage of the screw and prevent re-operations, various attempts have been made to reinforce the fragile bone with polymer based injectable materials. However, volumetric control of delivered material and/or measurement of bone density in post-operative follow-up remains challenging. This study presents the basic principles of a new algorithm for CT based volumetric analysis of the bone density in the region adjacent to the implant in the femoral head in comparison to the non-operated hip. The method was also used to track long term bone density changes at 3 to 6 months of follow up.