A statistical analysis on the reliability of the proximal articular set angle

Area of Science:

• Orthopedic surgery
• Biomechanical analysis
• Radiographic measurement

Background:

• Accurate assessment of foot biomechanics is crucial for effective hallux valgus treatment.
• The proximal articular set angle (PASA) is a key metric in evaluating forefoot alignment.
• Discrepancies between pre-operative and intra-operative measurements can affect surgical outcomes.

Purpose of the Study:

• To statistically analyze the relationship and significance between radiographic and intraoperative proximal articular set angles (PASA).
• To investigate the difference in PASA measurements between the transverse and sagittal planes.
• To highlight the importance of precise measurements for successful hallux valgus surgical correction.

Main Methods:

• Radiographic and intraoperative measurements of the transverse and sagittal plane proximal articular set angles (PASA).
• Statistical analysis to determine the significance of differences between measurement methods.
• Comparison of PASA values obtained through different techniques.

Main Results:

• A highly significant difference was found between the means of radiographic and intraoperative PASA measurements.
• Transverse plane PASA was approximately 7 degrees greater when measured intraoperatively compared to radiographically.
• A relationship was observed between radiographic and intraoperative transverse plane PASA, despite the significant difference.

Conclusions:

• Intraoperative PASA measurements differ significantly from radiographic assessments, particularly in the transverse plane.
• The study introduces the concept and measurement of a sagittal plane PASA.
• Accurate intraoperative PASA measurement is vital for optimizing surgical correction of hallux valgus.