A Technical Innovation in Midface Advancement With the External Frame Distraction Device.

ABSTRACT

BACKGROUND: Maxillary advancement with a rigid external distractor (RED) II is a commonly performed procedure for correcting midface hypoplasia. While there are various methods of anchoring the osteotomized maxillary segment to the halo device, the looped transpyriform wire is the simplest and most cost-effective. However, a common complication with this is the cutting through of the stainless steel traction wire across the pyriform buttress during distraction. The patient with cleft undergoing midface distraction is particularly vulnerable since the force needed for distraction is higher due to scarring from previous operations. INNOVATION AND DESIGN: A single-hole titanium plate is introduced as an interface between the bone of the pyriform buttress and the looped stainless steel traction wire attached to the external frame device. EVALUATION Twenty-four patients with cleft who underwent midface advancement using the external frame distractor before the introduction of the innovation were compared with 26 patients who underwent the same procedure after its introduction. The former group had 12.5% complication in the form of cut through of the traction wire, while the latter group had only 3.8% complication rate. CONCLUSION: Introduction of the titanium eyelet as an interface between the traction wire and the bone is a simple technical addition for a more reliable distraction using the RED II device in patients with cleft even in the presence of extensive scarring.