Biomaterial Database

Efficiency of mechanical trituration of amalgam I. Optimum capsule length. 1980

B W Darvell

Using the performance criterion of "success time" it has been possible to investigate in detail the changing efficiency of the amalgamation process as both capsule length and amplitude of oscillation are varied. The most efficient amalgamation was obtained for a length:amplitude ratio between 0.5 and 1.3 over a range of amplitudes. There is, however, an apparent upper limit to the amplitude which may be used without a loss in efficiency due to other factors becoming important. The nature of the relationship for the principal success region has been investigated theoretically, which result has been supported by the empirical observations. The ratio pi/2 corresponds closely to a minimum efficiency. It would seem that, because of the complexity of the precise calculation of the theoretical optimum, empirical determination would be the method of choice in any given system. However, there is satisfactory agreement between the theoretical approximately optimum ratio of 0.5 for l/1 and the observed minima in the range 0.4-0.7 for l/2.

UI	MeSH Term	Description	Entries
D008956	Models, Chemical	Theoretical representations that simulate the behavior or activity of chemical processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.	Chemical Models,Chemical Model,Model, Chemical
D009991	Oscillometry	The measurement of frequency or oscillation changes.	Oscillometries
D002627	Chemistry, Physical	The study of CHEMICAL PHENOMENA and processes in terms of the underlying PHYSICAL PHENOMENA and processes.	Physical Chemistry,Chemistries, Physical,Physical Chemistries
D003722	Dental Alloys	A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions for use in restorative or prosthetic dentistry.	Alloy, Dental,Alloys, Dental,Dental Alloy
D003723	Dental Amalgam	An alloy used in restorative dentistry that contains mercury, silver, tin, copper, and possibly zinc.	Amalgam, Dental,Amalgams, Dental,Dental Amalgams
D003748	Dental Equipment	The nonexpendable items used by the dentist or dental staff in the performance of professional duties. (From Boucher's Clinical Dental Terminology, 4th ed, p106)	Equipment, Dental,Dental Equipments,Equipments, Dental
D012399	Rotation	Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Clinorotation,Clinorotations,Rotations
D055598	Chemical Phenomena	The composition, structure, conformation, and properties of atoms and molecules, and their reaction and interaction processes.	Chemical Concepts,Chemical Processes,Physical Chemistry Concepts,Physical Chemistry Processes,Physicochemical Concepts,Physicochemical Phenomena,Physicochemical Processes,Chemical Phenomenon,Chemical Process,Physical Chemistry Phenomena,Physical Chemistry Process,Physicochemical Phenomenon,Physicochemical Process,Chemical Concept,Chemistry Process, Physical,Chemistry Processes, Physical,Concept, Chemical,Concept, Physical Chemistry,Concept, Physicochemical,Concepts, Chemical,Concepts, Physical Chemistry,Concepts, Physicochemical,Phenomena, Chemical,Phenomena, Physical Chemistry,Phenomena, Physicochemical,Phenomenon, Chemical,Phenomenon, Physicochemical,Physical Chemistry Concept,Physicochemical Concept,Process, Chemical,Process, Physical Chemistry,Process, Physicochemical,Processes, Chemical,Processes, Physical Chemistry,Processes, Physicochemical