Biomaterial Database

Frictional forces in fixed appliances. 1989

D C Tidy

Dundee Dental Hospital.

The aim of this investigation was to measure the frictional resistance to bodily tooth movement along, a continuous arch wire. A fixed appliance was constructed in vitro to simulate tooth movement in a previously aligned arch. The effect of load, bracket width, slot size, arch wire size, and material were studied. It was found that friction was proportional to applied load and inversely proportional to bracket width. Arch wire dimension and slot size had little effect. Nitinol and TMA (beta-titanium) arch wires produced frictional forces two and five times greater than those of stainless steel.

UI	MeSH Term	Description	Entries
D009967	Orthodontic Appliances	Devices used for influencing tooth position. Orthodontic appliances may be classified as fixed or removable, active or retaining, and intraoral or extraoral. (Boucher's Clinical Dental Terminology, 4th ed, p19)	Appliance, Orthodontic,Appliances, Orthodontic,Orthodontic Appliance
D009969	Orthodontic Wires	Wires of various dimensions and grades made of stainless steel or precious metal. They are used in orthodontic treatment.	Orthodontic Wire,Wire, Orthodontic,Wires, Orthodontic
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
D003799	Dental Stress Analysis	The description and measurement of the various factors that produce physical stress upon dental restorations, prostheses, or appliances, materials associated with them, or the natural oral structures.	Analyses, Dental Stress,Analysis, Dental Stress,Stress Analyses, Dental,Stress Analysis, Dental,Dental Stress Analyses
D004867	Equipment Design	Methods and patterns of fabricating machines and related hardware.	Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000497	Alloys	A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.	Alloy
D013193	Stainless Steel	Stainless steel. A steel containing Ni, Cr, or both. It does not tarnish on exposure and is used in corrosive environments. (Grant & Hack's Chemical Dictionary, 5th ed)	Stainless Steels,Steel, Stainless,Steels, Stainless
D014025	Titanium	A dark-gray, metallic element of widespread distribution but occurring in small amounts with atomic number, 22, atomic weight, 47.867 and symbol, Ti; specific gravity, 4.5; used for fixation of fractures.
D014087	Tooth Movement Techniques	Orthodontic techniques used to correct the malposition of a tooth or teeth.	Tooth Depression,Tooth Intrusion,Tooth Movement, Minor,Tooth Uprighting,Orthodontic Tooth Movement,Depression, Tooth,Depressions, Tooth,Intrusion, Tooth,Intrusions, Tooth,Minor Tooth Movement,Minor Tooth Movements,Movement Technique, Tooth,Movement Techniques, Tooth,Movement, Orthodontic Tooth,Movements, Orthodontic Tooth,Orthodontic Tooth Movements,Technique, Tooth Movement,Techniques, Tooth Movement,Tooth Depressions,Tooth Intrusions,Tooth Movement Technique,Tooth Movement, Orthodontic,Tooth Movements, Minor,Tooth Movements, Orthodontic,Tooth Uprightings,Uprighting, Tooth,Uprightings, Tooth