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A craniometric study of bicoronal craniosynostosis (BCC)
A M Slomic1, J P Bernier, J Morissette
1Department of Radiology, Highland View Regional Hospital, Amherst, Nova Scotia, Canada.
Journal of Craniofacial Genetics and Developmental Biology
|July 1, 1992
Summary
Bicoronal craniosyntosis (BCC) significantly alters skull shape, causing shortening, flattening, and reduced cranial capacity. This study reveals abnormal skull base angles and a lack of positive occipital rotation in BCC cases.
Area of Science:
- Craniofacial Surgery
- Pediatric Neurosurgery
- Medical Imaging
Background:
- Bicoronal craniosyntosis (BCC) is a congenital condition affecting skull development.
- Understanding the precise morphological changes in BCC is crucial for surgical planning.
Purpose of the Study:
- To quantitatively analyze the linear and angular cephalometric differences in bicoronal craniosyntosis (BCC) compared to normal skull morphology.
- To investigate the implications of these changes on skull base angulation and cranial capacity.
Main Methods:
- Comparative analysis of 20 BCC cases against age- and sex-matched normal statistical data.
- Measurement of linear and angular cephalometric parameters, including frontal arch height (FNBR), skull base angles (AB2, NTNO), and cephalic index (CI).
- Assessment of cranial capacity (CC) and analysis of bregma (BR) position and occipital rotation.
Main Results:
- BCC skulls exhibit significant shortening and flattening with normal width.
- Decreased frontal arch height (FNBR), increased AB2 angle, and decreased NTNO angle were observed.
- Reduced cranial capacity (CC), increased cephalic index (CI), anterior bregma (BR) displacement, and a lack of positive occipital rotation were noted.
Conclusions:
- BCC presents with distinct craniofacial abnormalities, including a depressed skull base and altered angulation.
- The observed lack of positive occipital rotation in BCC is a significant finding, potentially mimicking negative occipital rotation patterns.
- These quantitative findings provide valuable insights for understanding BCC pathogenesis and guiding surgical interventions.