Controlled longitudinal bone growth by temporary tension band plating: an experimental study

Area of Science:

• Orthopedic surgery
• Pediatric orthopedics
• Biomedical engineering

Background:

• Leg-length discrepancies often require surgical intervention.
• Permanent growth arrest is a common treatment, but requires precise timing.
• Temporary epiphysiodesis offers a potentially more flexible approach.

Purpose of the Study:

• To evaluate the efficacy of tension band plating for temporary epiphysiodesis in a long bone.
• To determine if this technique can control bone growth without permanent arrest.
• To assess the reversibility of growth control after implant removal.

Main Methods:

• An animal study was conducted on pigs, randomizing them to temporary epiphysiodesis of the tibia using tension band plating.
• Implants were removed after ten weeks.
• Magnetic Resonance Imaging (MRI) was used to assess interphyseal distance and metaphyseal water content at baseline, 10, and 15 weeks.

Main Results:

• Treated tibiae showed a significantly shorter interphyseal distance at both 10 and 15 weeks post-procedure (p=0.04).
• Metaphyseal water content was reduced on the treated side at 10 weeks (p=0.04), returning to baseline levels by 15 weeks (p=0.14).
• All animals demonstrated a return of growth after implant removal.

Conclusions:

• Tension band plating can achieve temporary epiphysiodesis, effectively controlling long bone growth.
• This technique shows promise for managing leg-length discrepancies by potentially eliminating the need for exact procedural timing.
• Further clinical investigation is warranted for this promising orthopedic technique.