Background: The need for surgical correction of frontal bossing in patients with sagittal synostosis is currently debated. The authors retrospectively analyzed frontal bossing in patients with isolated, nonsyndromic sagittal synostosis who underwent calvarial remodeling with and without frontal craniotomy and compared with control subjects.
Methods: The authors analyzed computed tomography (CT) scans of patients with sagittal synostosis <9 months of age (6.2 ± 1.6 months) who underwent modified-pi procedure either with frontal craniotomy (FC, n = 15) or without frontal craniotomy (NFC, n = 10). Only patients treated with both pre-operative and 1-year post-operative CT scans were included. Non-synostotic age-matched control scans were also analyzed. Cephalic index (CI), 3 previously validated measures of frontal bossing (bossing angle, horizontal bossing ratio, and vertical bossing ratio), and pre-nasion volume ratio were obtained. Additionally, three-dimensional photographs of 10 FC patients were evaluated for frontal bossing between 1 and 8 years post-operatively.
Results: Pre-operatively, no significant differences were found between the 2 groups (.064
Conclusions: At 1-year following modified-pi procedure, FC patients approached normalization of their forehead morphology to a greater extent than NFC patients. However, neither group completely normalized during this time period. Frontal bossing in FC patients continued to decrease with age, which reveals the post-operative dynamic nature of frontal bone morphology during childhood for these patients.
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