Abstract
Objective: A theoretical model, based on fluid dynamics, was developed to measure impression pressure. The purpose of this study was to evaluate the validity of this theoretical model by comparing its theoretical analysis against actual pressure measurements conducted using an impression tray and edentulous oral mucosa analog embedded with pressure sensors. Methods: In the theoretical model, a hollow tube was mounted onto an impression tray by penetrating through the tray. When force was applied to the tray, pressure was produced which then caused the impression material to flow into the hollow tube. Length of impression material which flowed into tube was denoted as l. In the calculation formula for theoretical model, pressure impulse I was expressed as a function of impression flow length l. For actual pressure measurements, four electric pressure sensors were embedded in an experimental edentulous arch. To visually observe and measure length of impression material flow, four transparent silicon tubes were mounted vertically at different positions on tray. During tray seating, impression material flowed into tubes and pressure which caused material flow movement was measured by the embedded sensor at each tube's position. Results: Based on actual pressure measurements under one experimental condition, regression analysis of pressure data acquired from electric sensors yielded the formula, Y = 0.056X2 + 0.124X. Based on theoretical analysis using a particular viscosity value, the numerical formula yielded was Y = 0.057X2, which resembled that of the regression formula. Significance: Theoretical model presented in this paper augured well for clinical application as an easy and economical means to examine magnitude and distribution of impression pressure by measuring lengths of impression material flow in tubes fixed to impression tray.
| Original language | English |
|---|---|
| Pages (from-to) | 530-534 |
| Number of pages | 5 |
| Journal | Dental Materials |
| Volume | 29 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2013 |
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Keywords
- Complete denture
- Impression
- Pressure
ASJC Scopus subject areas
- Dentistry(all)
- Materials Science(all)
- Mechanics of Materials
- Medicine(all)
Cite this
New theoretical model to measure pressure produced during impression procedure for complete dentures - Visual inspection of impression material flow. / Nishigawa, Goro; Maruo, Yukinori; Irie, M.; Oka, Makio; Tamada, Y.; Minagi, Shougo.
In: Dental Materials, Vol. 29, No. 5, 05.2013, p. 530-534.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - New theoretical model to measure pressure produced during impression procedure for complete dentures - Visual inspection of impression material flow
AU - Nishigawa, Goro
AU - Maruo, Yukinori
AU - Irie, M.
AU - Oka, Makio
AU - Tamada, Y.
AU - Minagi, Shougo
PY - 2013/5
Y1 - 2013/5
N2 - Objective: A theoretical model, based on fluid dynamics, was developed to measure impression pressure. The purpose of this study was to evaluate the validity of this theoretical model by comparing its theoretical analysis against actual pressure measurements conducted using an impression tray and edentulous oral mucosa analog embedded with pressure sensors. Methods: In the theoretical model, a hollow tube was mounted onto an impression tray by penetrating through the tray. When force was applied to the tray, pressure was produced which then caused the impression material to flow into the hollow tube. Length of impression material which flowed into tube was denoted as l. In the calculation formula for theoretical model, pressure impulse I was expressed as a function of impression flow length l. For actual pressure measurements, four electric pressure sensors were embedded in an experimental edentulous arch. To visually observe and measure length of impression material flow, four transparent silicon tubes were mounted vertically at different positions on tray. During tray seating, impression material flowed into tubes and pressure which caused material flow movement was measured by the embedded sensor at each tube's position. Results: Based on actual pressure measurements under one experimental condition, regression analysis of pressure data acquired from electric sensors yielded the formula, Y = 0.056X2 + 0.124X. Based on theoretical analysis using a particular viscosity value, the numerical formula yielded was Y = 0.057X2, which resembled that of the regression formula. Significance: Theoretical model presented in this paper augured well for clinical application as an easy and economical means to examine magnitude and distribution of impression pressure by measuring lengths of impression material flow in tubes fixed to impression tray.
AB - Objective: A theoretical model, based on fluid dynamics, was developed to measure impression pressure. The purpose of this study was to evaluate the validity of this theoretical model by comparing its theoretical analysis against actual pressure measurements conducted using an impression tray and edentulous oral mucosa analog embedded with pressure sensors. Methods: In the theoretical model, a hollow tube was mounted onto an impression tray by penetrating through the tray. When force was applied to the tray, pressure was produced which then caused the impression material to flow into the hollow tube. Length of impression material which flowed into tube was denoted as l. In the calculation formula for theoretical model, pressure impulse I was expressed as a function of impression flow length l. For actual pressure measurements, four electric pressure sensors were embedded in an experimental edentulous arch. To visually observe and measure length of impression material flow, four transparent silicon tubes were mounted vertically at different positions on tray. During tray seating, impression material flowed into tubes and pressure which caused material flow movement was measured by the embedded sensor at each tube's position. Results: Based on actual pressure measurements under one experimental condition, regression analysis of pressure data acquired from electric sensors yielded the formula, Y = 0.056X2 + 0.124X. Based on theoretical analysis using a particular viscosity value, the numerical formula yielded was Y = 0.057X2, which resembled that of the regression formula. Significance: Theoretical model presented in this paper augured well for clinical application as an easy and economical means to examine magnitude and distribution of impression pressure by measuring lengths of impression material flow in tubes fixed to impression tray.
KW - Complete denture
KW - Impression
KW - Pressure
UR - http://www.scopus.com/inward/record.url?scp=84876128017&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84876128017&partnerID=8YFLogxK
U2 - 10.1016/j.dental.2013.02.005
DO - 10.1016/j.dental.2013.02.005
M3 - Article
C2 - 23477950
AN - SCOPUS:84876128017
VL - 29
SP - 530
EP - 534
JO - Dental Materials
JF - Dental Materials
SN - 0109-5641
IS - 5
ER -