Roentgen stereophotogrammetry in high tibial osteotomy for gonarthrosis

✍ Scribed by Björn Tjörnstrand; Göran Selvik; Niels Egund; Anders Lindstrand

• Publisher: Springer
• Year: 1981
• Tongue: English
• Weight: 732 KB
• Volume: 99
• Category: Article
• ISSN: 1434-3916
• DOI: 10.1007/bf00389741

✦ Synopsis

In three cases operated with high tibial osteotomy for medial gonarthrosis the exact method of roentgen stereophotogrammetry with tantalum balls as bone markers (Selvik 1974) was used to study angular and translational movements in three dimensions at the operation and during the healing period Tibial osteotomy caused angular and translational movements even in planes where correction was not intended, and the stereo technique revealed that stability was not present when knee mobilisation started Correlation between the stereo values and conventional radiographic measurements were best in the frontal plane (root mean square value of discrepancies 1 3 °) Roentgen stereophotogrammetry gives superior information compared with the conventional radiographic technique, but it is concluded that the latter has sufficient accuracy for the clinical assessment of corrections in the frontal plane. transverse planes were recorded by an exact technique in three patients operated upon with high tibial osteotomy The roentgen stereophotogrammetric method with small tantalum balls as bone markers (Selvik 1974) was used This technique has yielded a technical accuracy of about 0 01 mm in measurements of longitudinal growth (Aronson et al 1978) and 0 1 °-0.3 °and 0 1 mm for rotation and translation in studies of spinal fusion (Olsson et al 1976).

Patients

In January 1980 high tibial osteotomies were performed in three patients with medial gonarthrosis. Case A A woman born in 1924 She had since two years weightbearing pain in her right knee and the last six months pain from the first step Radiographs showed a Stage II medial arthrosis (Fig I a).