Biomaterial Database

Relationship of investing medium to occlusal changes and vertical opening during denture construction. 1976

K N Zakhari

Four groups of 20 dentures with nonanatomic teeth were processed using four different investing techniques. The incisal guide pin was measured and recorded before processing and again after processing and remounting of each denture on the articulator. The difference between the two readings indicated vertical changes during processing. The least vertical opening and a complete absence of occlusal changes occurred in the dentures invested in the plaster of paris core with an artificial stone cap. The following conclusions were made: (1) Vertical opening in denture processing can be minimized by investing in plaster of paris molds with a stone occlusal matrix. (2) Tooth movement is minimized by the use of this investment combination. (3) Inadequate investing procedures contribute to vertical opening and occlusal discrepancies. (4) Vertical opening of dentures processed by compression molding technique may be due to other factors. This can only be determined by further investigation.

UI	MeSH Term	Description	Entries
D002133	Calcium Sulfate	A calcium salt that is used for a variety of purposes including: building materials, as a desiccant, in dentistry as an impression material, cast, or die, and in medicine for immobilizing casts and as a tablet excipient. It exists in various forms and states of hydration. Plaster of Paris is a mixture of powdered and heat-treated gypsum.	Dental Gypsum,Dental Stone, Artificial,Gypsum,Plaster of Paris,Alabaster,Anhydrous Sulfate of Lime,Artificial Dental Stone,Calcium Sulfate (1:1), Dihydrate,Calcium Sulfate (1:1), Hemihydrate,Calcium Sulfate (2:1),Calcium Sulfate Dihydrate,Calcium Sulfate, Anhydrous,Calcium Sulfate, Dihydrate,Calcium Sulfate, Hemihydrate,Calcium Sulphate,Drierite,Gypsite,Gypsum, Dental,Karstenite,Stone, Artificial Dental
D003734	Dental Casting Investment	Material from which the casting mold is made in the fabrication of gold or cobalt-chromium castings. (Boucher's Clinical Dental Terminology, 4th ed, p168)	Casting Investment, Dental,Casting Investments, Dental,Dental Casting Investments,Investment, Dental Casting,Investments, Dental Casting
D003735	Dental Casting Technique	The process of producing a form or impression made of metal or plaster using a mold.	Casting Technic, Dental,Casting Technics, Dental,Casting Technique, Dental,Casting Techniques, Dental,Dental Casting Technic,Dental Casting Technics,Dental Casting Techniques,Technic, Dental Casting,Technics, Dental Casting,Technique, Dental Casting,Techniques, Dental Casting
D003766	Dental Occlusion	The relationship of all the components of the masticatory system in normal function. It has special reference to the position and contact of the maxillary and mandibular teeth for the highest efficiency during the excursive movements of the jaw that are essential for mastication. (From Jablonski, Dictionary of Dentistry, 1992, p556, p472)	Canine Guidance,Occlusal Guidance,Occlusal Plane,Occlusion, Dental,Dental Occlusions,Guidance, Canine,Guidance, Occlusal,Occlusal Guidances,Occlusal Planes,Occlusions, Dental,Plane, Occlusal,Planes, Occlusal
D003779	Denture Design	The plan, delineation, and location of actual structural elements of dentures. The design can relate to retainers, stress-breakers, occlusal rests, flanges, framework, lingual or palatal bars, reciprocal arms, etc.	Denture Designs,Design, Denture,Designs, Denture
D003824	Denture, Complete	A denture replacing all natural teeth and associated structures in both the maxilla and mandible.	Complete Denture,Complete Dentures,Dentures, Complete
D012826	Silicone Elastomers	Polymers of silicone that are formed by crosslinking and treatment with amorphous silica to increase strength. They have properties similar to vulcanized natural rubber, in that they stretch under tension, retract rapidly, and fully recover to their original dimensions upon release. They are used in the encapsulation of surgical membranes and implants.	Elastomers, Silicone,Rubber Silicone,Silicone Rubber,Elastosil,Microfil,SE-30,Elastosils,Microfils,SE 30,SE30,Silicone Elastomer
D014716	Vertical Dimension	The length of the face determined by the distance of separation of jaws. Occlusal vertical dimension (OVD or VDO) or contact vertical dimension is the lower face height with the teeth in centric occlusion. Rest vertical dimension (VDR) is the lower face height measured from a chin point to a point just below the nose, with the mandible in rest position. (From Jablonski, Dictionary of Dentistry, 1992, p250)	Mandibular Rest Position,Rest Vertical Dimension,Vertical Dimension at Rest,Vertical Dimension of Occlusion,Dimension, Rest Vertical,Dimension, Vertical,Dimensions, Rest Vertical,Dimensions, Vertical,Mandibular Rest Positions,Occlusion Vertical Dimension,Occlusion Vertical Dimensions,Position, Mandibular Rest,Positions, Mandibular Rest,Rest Position, Mandibular,Rest Positions, Mandibular,Rest Vertical Dimensions,Vertical Dimension, Rest,Vertical Dimensions,Vertical Dimensions, Rest