Functional evaluation of scaphotrapeziotrapezoid fusion: A retrospective study.

The indication for surgery with STT - fusion includes Kienböck´s disease, STTarthrosis and radiocarpal instability combined with pain. Methods: 25 patients, 15 women and 10 men, underwent STT arthrodesis between January 2000 and June 2005. 15 patients suffered from arthrosis, 7 from Kienböck´s disease and 3 had pain combined with radiocarpal instability. Conventional X-ray was performed approxymately 10 weeks after surgery. A long term follow up is planned where the patients will be re-examined at a mean follow –up time of 35 months. Active range of motion (AROM) will be verified with a goniometer; grip strength measured with a JAMAR-Dynamometer II. The Key pressure grip measured with pinch gauge. Pain will be evaluated by a visual analogue scale (VAS) from zero to ten for stress and during resting conditions. We will use a Disabilities of the Arm, Shoulder and Hand questionnaire (DASH) to capture the patients´ upper-extremity function. Occupational conditions shall be evaluated. CT scan with 3D reformation will be used to evaluate degree of bone fusion, scafolunar angel and signs of arthrosis.

• Staff:

Anders Persson , MD, PhD		CT, DECT, 3D, visualization		CMIV
Thomas Hansson , MD, PhD		Hand Surgeon		Hand- och plastikkir. IMV, CMIV
Eva Granfelt		Occupational therapist		Hand- och plastikkir
Nina Kammerling , MD		Radiologist		BMC, IMV
Mårten Sandstedt , MD		Radiologist		BMC, IMV

• Former Staff:

• Project Description:

The indication for surgery with STT - fusion includes Kienböck´s disease, STTarthrosis and radiocarpal instability combined with pain. Methods:  25 patients, 15 women and 10 men, underwent STT arthrodesis between January 2000 and June 2005. 15 patients suffered from arthrosis, 7 from Kienböck´s disease and 3 had pain combined with radiocarpal instability.  Conventional X-ray was performed  approxymately 10 weeks after surgery. A long term follow up is planned where the patients will be re-examined at a mean follow –up time of 35 months. Active range of motion (AROM) will be verified with a goniometer; grip strength measured with a JAMAR-Dynamometer II.  The Key pressure grip measured with pinch gauge. Pain will be evaluated by a visual analogue scale (VAS) from zero to ten for stress and during resting conditions. We will use a Disabilities of the Arm, Shoulder and Hand questionnaire (DASH)  to capture the patients´ upper-extremity function. Occupational conditions shall be evaluated. CT scan with 3D reformation will be used to evaluate degree of bone fusion, scafolunar angel and signs of arthrosis.

Next step after this first study will be to use dual-energy CT and then visualize the arthrodesis and compare with conventional single energy CT images.