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April 17, 2026Head & Face MedicineOpen Access

Assessment of changes in selected parameters of Arnett’s soft tissue cephalometric analysis (STCA) in patients undergoing SARME/SARPE

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Authors

RNRafał NowakAOAnna OlejnikEZEwa Zawiślak

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Overview

Observational cohort study examines soft-tissue effects of maxillary expansion in adults, suggesting important implications for treatment planning.

Key Points

  • The aim is to evaluate changes in soft-tissue parameters after surgically assisted maxillary expansion using Arnett’s cephalometric analysis.
  • Retrospective observational cohort study of 42 adults with maxillary constriction undergoing SARME.
  • Lateral cephalograms were taken preoperatively and 6–8 months post-expansion.
  • Sixteen STCA parameters, including SNA, SNB, and ANB, were measured by two calibrated observers.
  • Statistical analysis utilized the Wilcoxon signed-rank test and Spearman’s correlation.
  • Mean clockwise rotation of the maxillary occlusal plane was +1.52° and the mandibular occlusal plane was +1.72°.
  • Vertical changes included increases in maxillary anterior height (+0.62 mm) and upper lip height (+0.56 mm).
  • Nasal tip projection decreased (–0.44 mm) and chin to forehead distance decreased (–3.11 mm), indicating posterior chin displacement.
  • Significant airway increase was observed at the Pog level (PAS-Pog +1.94 mm).
  • No differences were identified between skeletal Class II and III groups.

Cite This Study

Nowak et al. (2026) studied this question.

synapsesocial.com/papers/69e1ceaa5cdc762e9d857b15https://doi.org/10.1186/s13005-026-00616-y
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