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The thickness of skull at the halo pin insertion site.
MedLine Citation:
PMID:  21099739     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
STUDY DESIGN.: The thickness of 415 skulls of Thai population was measured at the areas where halo pins are placed. OBJECTIVE.: Analysis of skull thickness at the area of halo pin insertion site. SUMMARY OF BACKGROUND DATA.: Halo orthosis is a device used for providing stable fixation of instability of cervical spine injury. Although this device can be applied quickly and safely, complications do occur. While clinical experiences have informed us that cranial bone thickness varies with age. METHODS.: Coronal computerized tomography scans of 415 heads of patients who had no head injury, skull fracture, or craniofacial abnormalities were reviewed. All scans were performed with a Philips CX/Q. The patients' ages were between 15 days and 89 years. Measurements were taken directly from the computer console, using the measure mode function. These measurements were obtained in millimeters at the locations where halo pins would normally be placed. Statistical analyses within and between all age groups were performed using analysis of variance tests. RESULTS.: The skull thickness increased with age at all sites measured. The average thickness of skull at the anterior midline varied from 5.62 mm (0-9 years) to 7.42 mm (80-89 years). The average thickness of the anterolateral was from 5.52 to 8.54 mm, and the average thickness of the posterolateral was from 5.59 to 8.86 mm. CONCLUSION.: The thickness of skull at the halo pin insertion site gradually increases with age. Our study reveals that the thickness of skull reaches a steady peak in third to sixth decades. The thickness of skull at the anterior midline can be predicted by a simple linear regression equation: A = 7.302 + 0.014*age.
Authors:
Cholavech Chavasiri; Srinual Chavasiri
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Spine     Volume:  36     ISSN:  1528-1159     ISO Abbreviation:  Spine     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-10-06     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1819-23     Citation Subset:  IM    
Affiliation:
Departments of *Orthopaedic Surgery, †Physical Medicine and Rehabilitation, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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