Since 2013, our practice has systematically measured skeletal and airway changes associated with expansion-based orthodontic treatment.

The data presented here reflects longitudinal measurement in more than 340 standardized cases within a broader cohort of over 1,000 treated patients. These findings are currently undergoing structured compilation and independent review.

Why We Began Measuring

For many years, orthodontic outcomes were judged primarily by alignment and occlusion.

As our clinical focus shifted toward airway and structural health, we began evaluating whether those structural changes could be objectively documented.

Rather than rely on visual improvement or symptom reporting alone, we implemented consistent pre- and post-treatment measurement protocols.

The goal was to determine whether structural expansion translated into measurable airway change.

How the Data Was Collected

Measurements were obtained using consistent diagnostic tools before and after expansion-based treatment.

These included:

• Cone Beam CT (CBCT) imaging
• Acoustic rhinometry
• Acoustic pharyngometry
• Digital intraoral scans
• Sleep study metrics

Only cases with complete pre- and post-treatment values were included in the tracked data set.

To date, more than 340 cases meet this criterion within a broader cohort of over 1,000 treated airway-focused patients.

All measurements were performed using the same instrumentation pre- and post-expansion to maintain consistency.

The findings presented here represent structured clinical observations from private practice. Data compilation is ongoing and is currently undergoing independent review for formal analysis.

These results are not presented as peer-reviewed publication at this time.

What We Have Observed

1. Transverse Expansion and Nasal Airway Response

Transverse maxillary expansion increases nasal floor width.

Increased nasal floor width correlates with increased nasal airway volume.

2. Increased Airway Volume and Airflow Stability

Increased airway volume corresponds with improved airflow stability.

In pediatric cases, airway expansion is often accompanied by improvements in sleep-related symptoms.

In adult obstructive sleep apnea cases, reductions in AHI have frequently paralleled documented skeletal expansion.

3. Growth-Phase Expansion and Airway Change

Pediatric transverse deficiency is commonly associated with reduced airway cross-sectional area.

Expansion during growth has demonstrated measurable increases in minimum cross-sectional area and total nasal volume.

4. Non-Surgical Adult Skeletal Expansion

In selected adult patients, skeletal expansion has increased nasal volume without surgical osteotomy.

Measured nasal volume gains in adult expansion cases commonly range between 3 and 8 cubic centimeters.

5. Objective Tracking

Airway measurement provides objective tracking beyond visual occlusal assessment.

Structural change can be documented rather than assumed.

Clinical Significance

While not every patient demonstrates identical response patterns, measurable structural change has consistently been documented within the tracked cohort.

The findings support the following conclusions:

• Skeletal expansion produces measurable increases in nasal airway dimensions
• Airway measurement can objectively document change over time
• Structural evaluation plays a critical role in orthodontic treatment planning when airway compromise is present

These observations reinforce the importance of structural assessment as part of comprehensive orthodontic care.