Objective Bite Changes Following NUCCA Atlas Alignment: A Case Observation
Can the Atlas alignment affect the bite?
Overview
These comparative iTero bite scans demonstrate a measurable change in occlusal pressure distribution following a NUCCA (National Upper Cervical Chiropractic Association) atlas correction. The scans were captured two days apart—pre-alignment (11/10/2025) and post-alignment (11/12/2025)—with no intervening dental treatment, occlusal adjustment, or splint therapy.
Method
The iTero intraoral scanner provides a three-dimensional visualization of tooth contacts and relative occlusal force intensity. The color mapping reflects bite pressure, progressing from blue (light contact) through green/yellow (moderate) to orange/red (heavy contact).
Pre-Alignment Findings (Left Image)
The initial scan shows:
Concentrated high-pressure zones (red/orange) along the left posterior maxillary and mandibular segments, indicating asymmetric loading.
Reduced contact in the contralateral posterior region and anterior teeth, suggesting a lateralized occlusal pattern.
The overall force map pattern consistent with muscle hypertonicity and mandibular deviation secondary to upper cervical imbalance.
Post-Alignment Findings (Right Image)
After NUCCA atlas correction:
The red high-pressure areas have diminished, replaced by a broader distribution of moderate contacts (green/yellow) bilaterally.
Occlusal symmetry is visibly improved, with the force pattern now centered rather than unilateral.
The contact gradient suggests rebalanced masticatory muscle tone following normalization of the upper cervical relationship.
Clinical Interpretation
The atlas (C1) vertebra plays a critical role in head posture and proprioceptive input to cranial musculature, including the temporomandibular complex. Malposition of the C1 segment may alter mandibular rest position and occlusal dynamics through compensatory muscular activity.
The observed post-alignment change supports the hypothesis that cranio-cervical alignment directly influences occlusal balance.
Implications for Interdisciplinary Care
Integrating NUCCA or other upper cervical assessments into dental and TMJ evaluation protocols may help identify underlying postural or neurologic contributors to:
Chronic occlusal asymmetry
Recurrent muscle tension or clenching
Postural jaw deviation
TMJ dysfunction resistant to conventional treatment
Conclusion
These iTero images provide objective visual evidence that atlas alignment can alter bite force dynamics, even in the absence of direct dental intervention. They underscore the importance of viewing occlusion within the broader neuromusculoskeletal system—where structural balance begins at the top of the spine.
