Document Detail

Development of titanium fixation screw for hydroxyapatite osteosynthesis (APACERAM).
MedLine Citation:
PMID:  18291488     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Cranioplasty using custom-made HAP ceramic implants is a common procedure for skull defects. However, miniplate fixation using commercially available screws to stabilize the HAP flap is associated with several problems due to characteristic brittleness. The authors have thus developed a suitable screw for this procedure. METHODS: Hydroxyapatite blocks (porosity, 40%; thickness, 5 mm) were prepared. Holes were created using a phi 1.4-mm drill. Five types of screw were evaluated for HAP condition after insertion, fixation strength on pull-out test, and fasten plate strength based on maximum torque. RESULTS: Based on this evaluation, the most effective screws were cylindrical style in shape, 4.8 mm in effective length, phi 1.6 mm in effective diameter, and 0.2 mm in edge height. CONCLUSIONS: A novel screw with high fixation potential for the miniplate technique was developed in this study.
Yoshihide Tanaka
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-03-04
Journal Detail:
Title:  Surgical neurology     Volume:  70     ISSN:  0090-3019     ISO Abbreviation:  Surg Neurol     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-10-22     Completed Date:  2008-12-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0367070     Medline TA:  Surg Neurol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  545-9; discussion 549     Citation Subset:  IM    
Department of Neurosurgery, Yokosuka Kyousai Hospital, Yokosuka, Kanagawa 2380011, Japan.
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MeSH Terms
Biocompatible Materials*
Bone Plates
Bone Screws*
Craniotomy / instrumentation*
Equipment Design
Fracture Fixation, Internal / instrumentation*
Materials Testing
Models, Biological
Tensile Strength
Reg. No./Substance:
0/Biocompatible Materials; 1306-06-5/Durapatite; 7440-32-6/Titanium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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