RibXcar with Dots Point Technique: The Science of Fracture as a Safety Principle

Area of Science:

• Biomechanical Engineering
• Plastic and Reconstructive Surgery
• Surgical Innovation

Background:

• Minimally invasive percutaneous aesthetic rib reshaping (RibXcar) aims to reduce waist circumference via controlled rib angulation.
• Achieving precise monocortical fractures is crucial for minimizing complications in rib remodeling procedures.
• This study evaluates two distinct corticotomy orientations: perpendicular and parallel scraping.

Purpose of the Study:

• To compare the biomechanical properties of perpendicular corticotomy versus parallel scraping for rib remodeling.
• To determine which corticotomy orientation offers superior control and safety in creating monocortical fractures.
• To assess the force and time required for each technique to achieve specific fracture types.

Main Methods:

• Fifty porcine ribs were randomly assigned to either perpendicular corticotomy or parallel scraping groups.
• Standardized instruments were used to record rib dimensions.
• A calibrated digital dynamometer measured the force and time for monocortical and bicortical fracture generation.

Main Results:

• Perpendicular corticotomy required significantly less force for both monocortical (6.67 N vs. 14.54 N) and bicortical fractures (10.0 N vs. 17.83 N) compared to parallel scraping (P < 0.001).
• Monocortical fractures were achieved faster with the perpendicular technique (5.43 s vs. 6.19 s).
• Parallel scraping resulted in faster bicortical fractures (3.63 s vs. 7.90 s).

Conclusions:

• Perpendicular corticotomy demonstrated biomechanical advantages, requiring less force and offering better control for safe monocortical fractures.
• Parallel scraping was associated with a tendency towards earlier bicorticality.
• The findings suggest perpendicular corticotomy may be a safer and more predictable method for aesthetic rib remodeling.