Evaluation of hindfoot dimensions: a radiological study

Area of Science:

• Orthopedic surgery
• Radiology
• Anatomy

Background:

• Successful reconstruction of complex hindfoot disorders requires accurate foot realignment and ligament balancing.
• Standardized anatomical references are essential for surgical planning (osteotomies, arthrodeses, total ankle replacement).
• Current data on normal hindfoot anatomical dimensions on standard radiographs are lacking.

Purpose of the Study:

• To define reproducible and relevant anatomical measures on lateral hindfoot radiographs.
• To assess the reliability of these defined radiographic measures.
• To establish normative data for hindfoot anatomy.

Main Methods:

• Lateral radiographic views of 100 trauma patients were analyzed.
• Key dimensions measured included talar coverage, tibial tilt, distal tibial width, talar height, ankle joint radius, and center of rotation offset.
• Measurements were assessed for reliability.

Main Results:

• Normative values were established for talar coverage (88.1°), tibial tilt (83°), distal tibial width (33.6 mm), ankle joint radius (18.6 mm), and talar height (28.2 mm).
• An anterior offset of the center of rotation was measured at 1.7 mm.
• All assessed measures demonstrated reliability.

Conclusions:

• Reliable radiographic measures for normal hindfoot anatomy have been identified.
• These measures can be utilized to evaluate hindfoot disorders.
• The findings provide valuable preoperative planning references for complex hindfoot deformities and posttraumatic conditions, aiming for physiological correction.