The results of bone deformity correction using a spider frame with web-based software for lower extremity long bone...

Area of Science:

• Orthopedic surgery
• Biomedical engineering
• Limb reconstruction

Background:

• Lower extremity shortness and deformity present significant challenges in orthopedic treatment.
• Traditional methods may require multiple surgical stages and prolonged recovery.
• Computer-assisted external fixation offers potential for improved precision and efficiency.

Purpose of the Study:

• To evaluate the functional and radiological outcomes of the computer-assisted external fixator (spider frame).
• To assess the effectiveness of the spider frame in correcting lower extremity shortness and deformity.
• To present the results of patients treated with this innovative fixation system.

Main Methods:

• Seventeen patients with lower extremity long bone deformity/shortness were treated using a spider frame.
• Preoperative difficulty assessed with the Paley Scale; postoperative results evaluated using modified ASAMI/Paley criteria.
• External Fixator Index and Distraction Index calculated for outcome assessment.

Main Results:

• Mean lengthening achieved was 3.0 cm over a mean follow-up of 15 months.
• Mean External Fixator Index was 98 days/cm; mean Distraction Index was 10.49 days/cm.
• The spider frame was applied to the femur in 10 patients and the tibia in seven.

Conclusions:

• The computer-assisted spider frame enables single-stage correction of both deformity and shortness.
• The system is easily applied and its advanced software facilitates postoperative deformity management.
• This technology shows promise for effective limb reconstruction and lengthening procedures.