Pencil Grip X-Ray View Improves Detection of Early Wrist Arthritis

Area of Science:

• Orthopedic imaging
• Radiology
• Wrist biomechanics

Background:

• Scapholunate instability leads to progressive wrist arthritis.
• Early arthritis signs like joint space narrowing are hard to detect on standard PA X-rays.
• Scapholunate Advanced Collapse (SLAC) wrist arthritis requires accurate early diagnosis.

Purpose of the Study:

• To compare the accuracy of pencil grip X-ray views versus standard posterior-anterior (PA) X-ray views in assessing joint space narrowing in wrist arthritis.
• To evaluate the sensitivity of the pencil grip view in detecting early radiographic changes associated with SLAC wrist.

Main Methods:

• Retrospective review of 29 patients with pencil grip X-rays and documented wrist arthritis.
• Independent radiographic review classifying arthritis stages for both PA and pencil grip views.
• Measurement of radioscaphoid and radiolunate joint spaces with statistical comparison.

Main Results:

• Pencil grip X-rays showed significantly lower radioscaphoid distances than PA views across all arthritis grades (p < 0.05).
• The pencil grip view was more accurate in demonstrating radioscaphoid joint space narrowing in grade 2 osteoarthritis.
• No significant differences in radiolunate distances were observed between the two X-ray views.

Conclusions:

• The pencil grip X-ray view is more sensitive for detecting radioscaphoid joint space narrowing compared to standard PA views.
• This technique may be particularly valuable for identifying early-stage radioscaphoid arthritis.
• The pencil grip view offers a potential improvement in the radiographic assessment of wrist arthritis.