| An artificial oral environment for testing dental materials. | |
| | |
MedLine Citation:
|
PMID: 1855795 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Two servo-hydraulic actuators were combined to produce the force movement cycle of human mastication. A closed-loop method of control was used which functions in a manner similar to the human neuromuscular system. The horizontal closed-loop uses a linearly variable differential amplifier (LVDT) to monitor the position. The vertical closed-loop uses both an LVDT to monitor position and a load cell to monitor force with a "mode switch" being made between the two mechanisms of control. A function generator is used to produce a sine wave which is modified to produce the movement and force programs for the two servo-hydraulic actuators. An acrylic chamber was constructed which contains the test samples and maintains an environment similar to that which occurs in the mouth. Natural or artificial saliva maintained at 37 degrees C is continuously circulated through the chamber. The time to complete a single chewing cycle was decreased by eliminating that part of the cycle where no force is produced. This enables the chewing rate to be increased to four cycles per second. The wear produced in the artificial mouth was found to have a high correlation with clinical wear if 250,000 cycles in the artificial mouth are assumed to be equivalent to one year in the human mouth. |
| | |
Authors:
|
R DeLong; W H Douglas |
Related Documents
:
|
6946215 - Occlusal forces during chewing and swallowing as measured by sound transmission. 3318395 - Magnetic versus mechanical expansion with different force thresholds and points of forc... 15005435 - Effect of light energy on peroxide tooth bleaching. 15460895 - Wavelength-dependent optical force on elliptical silver cylinders at plasmon resonance. 19011215 - Compass gait mechanics account for top walking speeds in ducks and humans. 22082775 - Effect of colour leds on mycelia growth of aspergillus ficuum and phytase production in... |
Publication Detail:
|
Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
|
Title: IEEE transactions on bio-medical engineering Volume: 38 ISSN: 0018-9294 ISO Abbreviation: IEEE Trans Biomed Eng Publication Date: 1991 Apr |
Date Detail:
|
Created Date: 1991-08-29 Completed Date: 1991-08-29 Revised Date: 2009-11-11 |
Medline Journal Info:
|
Nlm Unique ID: 0012737 Medline TA: IEEE Trans Biomed Eng Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 339-45 Citation Subset: IM |
Affiliation:
|
Biomaterials Program, School of Dentistry, University of Minnesota, Minneapolis 55455. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Dental Materials* Humans Mandible / physiology Mastication / physiology* Materials Testing* Models, Biological* Movement / physiology |
| Grant Support | |
ID/Acronym/Agency:
|
P50 DE08240/DE/NIDCR NIH HHS |
| Chemical | |
Reg. No./Substance:
|
0/Dental Materials |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Computer-aided interpretation and quantification of angular periodontal bone defects on dental radio...
Next Document: Optical determination of dental pulp vitality.