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dc.contributor.advisorDe Silva, Rohana Kumara
dc.contributor.advisorLove, Robert
dc.contributor.advisorTong, Darryl
dc.contributor.advisorDe Silva, Harsha
dc.contributor.advisorDias, George
dc.contributor.authorChoi, Han Joon
dc.date.available2011-11-23T03:25:31Z
dc.date.copyright2011
dc.identifier.citationChoi, H. J. (2011). The thickness of parietal bones in a New Zealand sample of cadaveric skulls in relation to calvarial bone graft, 2007-2011 (Thesis, Master of Dental Surgery). University of Otago. Retrieved from http://hdl.handle.net/10523/2027en
dc.identifier.urihttp://hdl.handle.net/10523/2027
dc.description.abstractObjectives: (1) To evaluate the average thickness of the parietal bones in a New Zealand European sample of cadaveric skulls; (2) to construct a thickness map of the parietal bone; and (3) to identify the ideal site(s) for calvarial bone graft harvest using the parietal bone. Study Design: Twenty-five wet cranial vaults (fifty parietal bones) of New Zealand European origin were obtained from the Department of Anatomy at the University of Otago, New Zealand. A total number of 3887 points (average of 78 points per bone) in 135 equivalent locations throughout the specimens were measured for its thickness using an electronic calliper. Statistical analysis was performed using a software system R. Analyses to identify the ideal harvest sites were conducted so that they fit features of ideal harvest site described in the literature as: 6 mm of minimum thickness; and 2 cm way from the midline. Results: The overall average thickness was 6.69 mm with a standard error of 0.22 mm. The average thickness at different locations ranged from 2.85 mm to 6.93 mm. The report also observed a progressive thickening of the parietal bone in both medial and posterior directions. A thickness map clearly demonstrated regions with varying thickness of the parietal bone in its different regions. Of all 135 locations, a significant proportion - forty-seven locations (34.5%) - had an average thickness greater than 6 mm. The proportion was also high – twenty-seven locations (20%) - after excluding the locations within 2 cm from the midline. However, a frequency of encountering bone with an actual thickness less than 6 mm was also high at 20.6% in this region. The frequency was reduced to 13% in locations with an average thickness greater than 6.5 mm. However, only a very limited number of locations (3/135 = 2%) had an average thickness greater than 6.5 mm in our study sample after excluding the locations within 2 cm from the mid-sagittal plane. Conclusions: Parietal bone thickness in our study sample is similar to that of other ethnicities reported in the literature. The ideal calvarial bone graft sites that safely meet the recommendations were found to be scarce in this study. Further research to validate or update the current recommendations for the ideal sites of calvarial bone harvest sites including pre-operative imaging modalities is recommended.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherUniversity of Otago
dc.rightsAll items in OUR Archive are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectcalvarial bone graft
dc.subjectparietal bone thickness
dc.titleThe thickness of parietal bones in a New Zealand sample of cadaveric skulls in relation to calvarial bone graft, 2007-2011
dc.typeThesis
dc.date.updated2011-11-23T02:44:58Z
thesis.degree.disciplineOral Diagnostic and Surgical Sciences
thesis.degree.nameMaster of Dental Surgery
thesis.degree.grantorUniversity of Otago
thesis.degree.levelMasters
otago.openaccessOpen
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