Biomaterial Database

Longitudinal study on torque around the sagittal axis in lower distal-extension removable partial dentures. 1993

K Ogata

Department of Removable Prosthodontics, Okayama University Dental School, Japan.

The purpose of this study was to examine the longitudinal changes of torque around the sagittal axis in lower distal-extension removable partial dentures. The torque transmitted from the denture base to retainers was measured on several separate occasions from the insertion of new dentures to about 2 months after it. The maximal mean value of torque (Max.MT) was calculated from the magnitude of all chewing strokes of the minimum of the interocclusal distance. The integration values of torque (I) and time (T) from initiation of chewing to swallowing were obtained and then the average value of torque (Ave.T) was calculated (Ave.T = I/T). Subjects could be divided into two groups. Max.MT and Ave.T were almost constant in one group while they were remarkably decreased in another. After 1 month of insertion of new dentures the value of both groups was within the range of less than 3 x 10(-3) kgm (1 kgm = 9.8 Nm) of Max.MT and less than 1 x 10(-3) kgm ss-1 of Ave.T.

UI	MeSH Term	Description	Entries
D007576	Jaw, Edentulous, Partially	Absence of teeth from a portion of the mandible and/or maxilla.
D008334	Mandible	The largest and strongest bone of the FACE constituting the lower jaw. It supports the lower teeth.	Mylohyoid Groove,Mylohyoid Ridge,Groove, Mylohyoid,Grooves, Mylohyoid,Mandibles,Mylohyoid Grooves,Mylohyoid Ridges,Ridge, Mylohyoid,Ridges, Mylohyoid
D008409	Mastication	The act and process of chewing and grinding food in the mouth.	Chewing
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
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
D003832	Denture, Partial, Removable	A partial denture designed and constructed to be removed readily from the mouth.	Removable Partial Denture,Denture, Removable Partial,Dentures, Removable Partial,Partial Denture, Removable,Partial Dentures, Removable,Removable Partial Dentures
D005502	Food	Substances taken in by the body to provide nourishment.	Foods
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000044	Dental Abutments	Natural teeth or teeth roots used as anchorage for a fixed or removable denture or other prosthesis (such as an implant) serving the same purpose.	Abutments, Dental,Abutment, Dental,Dental Abutment
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults