Quantitative assessment of distraction osteogenesis regenerates on digital radiographs using computerized image...

Area of Science:

• Orthopedic Surgery
• Biomedical Imaging
• Regenerative Medicine

Background:

• Traditional assessment of distraction osteogenesis (D.O.) regenerates relies on subjective radiographic interpretation, leading to inter-observer variability.
• Existing quantitative methods for assessing D.O. regenerates have limitations.
• There is a need for objective and reliable methods to quantify D.O. regenerates.

Purpose of the Study:

• To introduce a novel quantitative technique for assessing D.O. regenerates using digital radiographs.
• To compare the novel technique with conventional Bone Mineral Density (BMD) measurements.
• To evaluate the efficacy of Area Fraction (AF) and Fractal Dimension (FD) in quantifying D.O. regenerates.

Main Methods:

• A prospective study involving eleven subjects undergoing distraction osteogenesis.
• Monthly follow-up with digital radiographs and DEXA scans for Bone Mineral Density (BMD) ratio assessment over a minimum of 6 months.
• Quantitative analysis using ImageJ software to determine Area Fraction (AF) and Fractal Dimension (FD) of the regenerates.

Main Results:

• Area Fraction (AF) showed a steady increase, while Fractal Dimension (FD) demonstrated a consistent decrease as regenerates matured.
• A moderate positive correlation was observed between BMD ratio and AF (AP view: r = 0.46, p = 0.005; lateral view: r = 0.34, p = 0.004).
• A weak negative correlation was found between BMD ratio and FD (AP view: r = -0.28, p = 0.1; lateral view: r = -0.16, p = 0.36), with significant differences in AF and FD between initial and final regenerates.

Conclusions:

• The novel quantitative image-based analysis using AF and FD can efficiently quantify and monitor distraction osteogenesis regenerates.
• This technique shows promise for improving the assessment of D.O. regenerates.
• Further validation in larger patient cohorts is required before routine clinical implementation.