NDLI: Maximum forces applied to the orbital floor after fractures.

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Maximum forces applied to the orbital floor after fractures.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Steiner, Martin Kern, Matthias Lucius, Ralph Birkenfeld, Falk Becker, Stephan Thomas Witlfang, Jörg Möller, Björn
Description	Country affiliation: Germany Author Affiliation: Birkenfeld F ( Institute of Anatomy, Christian-Albrechts University Kiel, Otto-Hahn-Platz 8, 24118 Kiel, Germany. f.birkenfeld@anat.uni-kiel.de)
Abstract	The objective of this study was to measure the force on and displacement of completely detached intraorbital tissue from the bony orbit, as a worst-case scenario after orbital trauma, to preserve the maximum load and predict the necessary strength of reconstruction materials. Six fresh-frozen human heads were used, and orbital floor defects in the right and left orbits were created by the direct impact of 3.0 J onto the globe and infraorbital rim. The orbital floor defect sizes and displacements were evaluated after performing a Le Fort I osteotomy. In addition, after the repositioning of the completely detached intraorbital tissue, the forces and displacements were measured. The mean orbital floor defect sizes were 208.3 (SD, 33.4) mm2 for globe impacts and 221.8 (SD, 53.1) mm2 for infraorbital impacts. The mean intraorbital tissue displacement after the impact and before repositioning was 5.6 (SD, 1.0) mm for globe impacts and 2.8 (SD, 0.7) mm for infraorbital impacts. After repositioning, the displacements were 0.8 (SD, 0.5) mm and 1.1 (SD, 0.7) mm, respectively. The measured forces were 0.10519 (SD, 0.00958) N without the incorporation and approximately 0.11128 (SD, 0.003599) N with the incorporation of reconstruction materials. The maximum forces on the completely detached orbital tissue were minimal (â ¼0.11 N) and suggest the use of collagen membranes as reconstruction materials for orbital floor defects, at least in medium-sized fractures.
ISSN	10492275
Issue Number	5
Volume Number	23
e-ISSN	15363732
Journal	Journal of Craniofacial Surgery
Language	English
Publisher	Lippincott Williams & Wilkins
Publisher Date	2012-09-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Orbital Fractures Physiopathology Surgery Reconstructive Surgical Procedures Methods Aged Aged, 80 And Over Cadaver Humans Materials Testing Middle Aged Osteotomy, Le Fort Stress, Mechanical Journal Article Discipline Medicine Discipline Otorhinolaryngology Discipline Surgery
Content Type	Text
Resource Type	Article
Subject	Otorhinolaryngology Surgery

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