Results 241 to 250 of about 1,817,876 (281)

Retention of dowels subjected to tensile and torsional forces

The Journal of Prosthetic Dentistry, 1979
This investigation measured the maximal tensile and torsional forces sustained by four different designs of dowels. 1. Under tensile force, the threaded screw-in dowels were significantly more retentive than the unthreaded dowels. 2. Under torque, both the threaded screw-in and serrated dowels were significantly more retentive than the smooth-sided ...
D R, Ruemping, M R, Lund, R J, Schnell
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Brushing effect on the retentive force of retentive inserts in three denture attachments: An in vitro study

The Journal of Prosthetic Dentistry, 2022
Daily denture brushing results in wear on implant-retained overdenture attachments. However, studies on the remaining denture attachment retention after brushing are lacking.The purpose of this in vitro study was to evaluate the retentive force of the retentive inserts in 3 denture attachments after brushing with different media.Three retentive insert ...
Krid Kamonkhantikul, Woraporn Homsiang, Mansuang Arksornnukit   +2 more
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Retention in the Naval Reserve Force

1988
Abstract : This research memorandum investigates continuation rates in the Naval Reserve Force by tracking individuals' records from quarter to quarter. The nature and timing of attrition are analyzed. Tests are performed for differences in continuation rates by geographical area, paygrade, length of service, rating, program of entry into the Reserve ...
David L. Reese, Martha E. Shiells
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An analysis of dental magnets retentive force

Journal of dental research, 2000
When planning retention one of the most important tuks is to ensure that the construction, size and shape of the retention element enable the transfer of forces which the underlying tissue can withstand without damage. The aim of this study was to demonstrate the force of the magnetic retetention elements which are most frequently used.
Carek, Vlado, Jerolimov, Vjekoslav, Kuna, Tihomir   +2 more
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Retention of Sealing Force by Elastomerlc Gaskets

SAE Technical Paper Series, 1987
<div class="htmlview paragraph">Using the Lucas Compression Stress Relaxometer, the effect of cycling heating and cooling on retention of sealing force of various elastomers is presented. The study includes the effect of exposure of the sealing material to air, engine coolant, and motor oil. Thermal expansion, stress relaxation, and polymer swell
Jerome Pala, Viraj J. Buch, Donald J. McDowell   +2 more
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Retention and Career Force Quality

1984
Abstract : Previous studies have examined the factors that influence first-term retention. This analysis expands on prior work to investigate the impact of these factors on retention and the quality of personnel retained. Findings show that the aggregate pay elasticity is approximately 2 (which is similar to that found in earlier analyses), but that ...
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Open Problems in Wetting Phenomena: Pinning Retention Forces

Langmuir, 2021
We review existing explanations for drop pinning and the origin of the force required to initiate the sliding of a drop on a solid surface (depinning). Theories that describe these phenomena include de Gennes', Marmur's, Furmidge's, the related Furmidge-Extrand's, and Tadmor's theory.
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A force retention mechanism by MR Spring for walking support

2009 IEEE International Conference on Robotics and Biomimetics (ROBIO), 2009
In recent years, the number of elderly persons and lower limb disabled people has increased and most of them need a cane or a wheelchair to support their walk in their daily lives. Even though the cane is quite common and widely used it has the disadvantage of putting a large load on the upper limbs.
Shinya Shimizu, Kenji Suzuki 0002
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Retention force and fatigue strength of overdenture attachment systems

Journal of Oral Rehabilitation, 2004
summary  This study evaluated retention force and fatigue resistance of two overdenture attachment systems. Twenty samples (O‐ring and Bar‐Clip) from two manufacturers (Conexão Sistemas de Prótese and Lifecore Biomedical) were prepared and divided into four groups: (i) Conexão/O‐ring; (ii) Conexão/Bar‐Clip; (iii) Lifecore/O‐ring and (iv) Lifecore/Bar ...
Botega, D. M., Mesquita, M. F., Henriques, GEP, Vaz, Luis Geraldo   +3 more
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In vitro effect of microwave irradiation on the retentive force of magnets

The Journal of Prosthetic Dentistry, 2004
Few studies have addressed the possible effect(s) of microwave irradiation on the magnetic properties of "permanent" magnets during the fabrication of dental and maxillofacial prostheses.The objective of this study was to investigate the influence of microwave irradiation energy on the retentive force of a magnetic attachment system used in ...
James C, Lemon, Rene A, Brignoni, Stephen M, Collard, Jack W, Martin, John M, Powers, Mark S, Chambers   +5 more
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