Lateral talar dome access utilizing temporary invasive distraction.

Area of Science:

• Orthopedic Surgery
• Foot and Ankle Surgery
• Biomechanical Research

Background:

• Autogenous osteochondral grafting treats osteochondral lesions of the talus (OLT).
• Graft implantation often necessitates osteotomy for perpendicular access.
• Current methods may involve significant soft tissue disruption.

Purpose of the Study:

• To compare the effectiveness of soft tissue releases, osteotomies, and temporary invasive distraction (TID) in achieving perpendicular access to the lateral talar dome.
• To determine if TID provides superior or equivalent access compared to anterolateral arthrotomy and anterolateral tibial osteotomy.

Main Methods:

• Eight fresh frozen cadaveric limb specimens were used.
• Approaches evaluated included anterolateral arthrotomy, TID alone, anterolateral tibial osteotomy alone, and TID with osteotomy.
• Measurements of accessible area and anterior-to-posterior (AP) access were recorded for each method.

Main Results:

• TID significantly improved AP access and overall area compared to arthrotomy alone.
• TID alone demonstrated equivalent AP access and area compared to anterolateral tibial osteotomy.
• Combined TID and osteotomy yielded superior AP access and area compared to either method used individually.

Conclusions:

• Temporary invasive distraction (TID) via external fixation enhances perpendicular access to the talar dome.
• TID offers comparable access to anterolateral osteotomy, potentially avoiding osteotomy-related morbidity.
• TID may be a valuable alternative for treating osteochondral lesions of the talus.