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Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome

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Angled channel retractor for sagittal split ramus osteotomy.

T Watanabe¹, R Uozumi², A Yamazaki¹

¹Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan.

International Journal of Oral and Maxillofacial Surgery

|October 17, 2024

Summary

This summary is machine-generated.

A novel angled channel retractor improves stability during mandibular ramus osteotomy. This surgical tool enhances soft tissue protection and offers versatility for different osteotomy procedures.

Keywords:

Dental occlusion Mandible Orthognathic surgery Osteotomy Surgical instruments

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Area of Science:

Oral and Maxillofacial Surgery
Biomedical Engineering
Orthodontics

Background:

Conventional channel retractors have poor fit during sagittal split ramus osteotomy, potentially causing complications like bleeding.
The saucer-shaped blade of existing retractors does not conform well to the mandibular ramus posterior border during medial osteotomy.

Purpose of the Study:

To develop and evaluate a novel angled channel retractor with an adjusted blade angle for improved fit and stability during mandibular osteotomies.
To enhance surgical outcomes by reducing complications associated with sagittal split ramus osteotomy.

Main Methods:

Collected lateral cephalograms from 339 Japanese patients with jaw deformities.
Calculated the occlusal ramus angle using Downs-Northwestern cephalometric analysis.
Fabricated an angled channel retractor with a 70° blade bend based on calculated angles.

Main Results:

The angled channel retractor demonstrated enhanced engagement and stability at the posterior border of the mandibular ramus during medial osteotomy.
The design allows for versatile use as a retractor for both medial and lateral osteotomies on contralateral sides.
Improved fit minimizes complications such as excessive bleeding.

Conclusions:

The novel angled channel retractor provides superior stability and versatility compared to conventional designs.
This instrument is a valuable advancement for sagittal split ramus osteotomy procedures.
The design optimizes soft tissue protection and surgical maneuverability.