Biomaterial Database

[Influence of various impression procedures for mandibular distal extension removable partial denture on displacement of residual ridge]. 1996

M Sato

First Department of Prosthodentics, Tokyo Medical and Dental University, Japan.

In order to investigate the influence of various impression procedures on the morphology of the partially edentulous mucosal tissue precisely, a new 3-D measurement system based on a binocular-temporal gradient method was devised. The greatest advantage of the system is that the amounts of substance and minute deformation of the object can be easily measured simultaneously. The accuracy of the system is 0.1mm and 10mm in the substance measurement and in the deformation measurement respectively. Three parameters selected for the impression procedure were the space between the inner surface of the tray and the mucosal tissue, the flow of impression material and the size of tray. It was found that the amount of displacement in the mucosal tissue was increased as the thickness of space on the tray was reduced or the viscosity of the impression material was increased in partially edentulous patients. Moreover, the large tray caused greater displacement around the margin than the small one.

UI	MeSH Term	Description	Entries
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
D009061	Mouth Mucosa	Lining of the ORAL CAVITY, including mucosa on the GUMS; the PALATE; the LIP; the CHEEK; floor of the mouth; and other structures. The mucosa is generally a nonkeratinized stratified squamous EPITHELIUM covering muscle, bone, or glands but can show varying degree of keratinization at specific locations.	Buccal Mucosa,Oral Mucosa,Mucosa, Mouth,Mucosa, Oral
D003761	Dental Impression Technique	Procedure of producing an imprint or negative likeness of the teeth and/or edentulous areas. Impressions are made in plastic material which becomes hardened or set while in contact with the tissue. They are later filled with plaster of Paris or artificial stone to produce a facsimile of the oral structures present. Impressions may be made of a full complement of teeth, of areas where some teeth have been removed, or in a mouth from which all teeth have been extracted. (Illustrated Dictionary of Dentistry, 1982)	Dental Impression Technic,Dental Impression Technics,Dental Impression Techniques,Impression Technic, Dental,Impression Technics, Dental,Impression Technique, Dental,Impression Techniques, Dental,Technic, Dental Impression,Technics, Dental Impression,Technique, Dental Impression,Techniques, Dental Impression
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
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000540	Alveolar Ridge Augmentation	Preprosthetic surgery involving rib, cartilage, or iliac crest bone grafts, usually autologous, or synthetic implants for rebuilding the alveolar ridge.	Mandibular Ridge Augmentation,Maxillary Ridge Augmentation,Alveolar Ridge Augmentations,Augmentation, Alveolar Ridge,Augmentation, Mandibular Ridge,Augmentation, Maxillary Ridge,Augmentations, Alveolar Ridge,Augmentations, Mandibular Ridge,Augmentations, Maxillary Ridge,Mandibular Ridge Augmentations,Maxillary Ridge Augmentations,Ridge Augmentation, Alveolar,Ridge Augmentation, Mandibular,Ridge Augmentation, Maxillary,Ridge Augmentations, Alveolar,Ridge Augmentations, Mandibular,Ridge Augmentations, Maxillary
D012680	Sensitivity and Specificity	Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)	Specificity,Sensitivity,Specificity and Sensitivity