Abrasive : A material that smoothes a surface by abrasion. Absorption: the process of shrinking or absorbing. Abutment: A tooth which abuts an edentulous space and which may be used to support,retain a prosthesis. Adhesion: The attraction of molecules of dissimilar substance in close contact,i.e saliva to the denture. Aesthetics: The principles of taste and art.Agar hydrocolloid: A reversible water-jelly which changes to a sol on heating and to gel on cooling.
Alginate hydrocolloid: An irreversible water jelly which gels after mixing by means of a non reversible chemical reaction. Alveolar ridge: The upstanding ridge of bone and covering tissue which remains after teeth removal. ALVEOLECTOMY: Removal of alveolar bone. Alveolotomy: Incision and moulding of alveolar bone. Amalgamation: The process of mixing mercury with a metal or alloy,the result of which is an amalgam. Anchorage: The part of natural tissues which provides resistance to displacement of a prosthesis or appliance. Anneal: The softening of a metal by a controlled heating and cooling process. Anterior:in front of. Anti-flux: a substance which limits the flow of flux and solder. Articulator: a relationship of the upper and lower teeth which exists during mandibular movement from one occlusion to another. Attrition: the process of wearing away.Balanced articulation: a multi point contact relationship of opposing teeth in which they glide smoothly over each other during mandibular movement wittout causing dislodgement of the denture.
Balanced occlusion: a multi-point contact relationship of opposing teeth in static contact. Binary alloy: an intimate blending of two metals.Bite:the act of raising the lower jaw. Bite-raising appliance: an appliance which increases the interocclusal distance by covering the occlusal surfaces of the teeth. Bracing: the resistance to horizontal displacing forces.Bridge: a compact usually fixed, prosthesis which is supported and retained mainly by inlay and crowns. Brittleness: the tendence to suddenly fracture on impact or under pressure. Cast: a dental model usually made from an impression. Cavity: a hole or recess. Cervix: the curved junction of crown and root at the gum margin. Cingulum: a U-shape ridge at the base of the lingual or palatal surface of the crown of upper and lower anteriors. Claps: a wrought or cast metallic arm attached to a partial denture which embraces natural teeth for retention purpose. Clasping axis: a line drawn between clasps on a denture. cleft palate: a congital fissure of the soft or hard palates.cohesion: the attraction lf molecules of similar substances,i.e saliva on the mucosa to saliva on the denture.compensating curve: a saucer like curve of artificial teeth which is similar to the curves of spee and monson in natural dentition. Flat cusp requries a steeper curve and high cusp teeth requries a shallower one.compressive strength: the internal resistance of a material to a com'ressive stress which crushes it to destruction.connector: a component of a partial denture which connects various parts f the prothesis.it may be major or minor. Contouring: a method of waxing up which reproduce bulges on flanges to represent root prominence in the mouth. core: part of model or mould made separately to fill in undercut. counterdie:a negative reproduction of the die. It is use for swaging.crazing: a network of minute cracks on the surface of acrylic resin, a result of the relief of stress.cross bite: an abnormal relationshi of the posterior teeth in which the buccal cusp of uppers are lingual to the buccal cusps of the lowers. crown: the part of a natural tooth located above the gingival which is covered by enamel. Artificial crown: a prosthestic restoration sited above the gingival and made of Porcelain, resin or metal.and may be anchored to the crown or root.CURVES OF MONSON: This is the curve of occlusion in which each cusp and incisal edge touches to a segment of the surface of a sphere four inches in radius with its centre in the region of the glabellas.
CURVES OF SPEE: An imaginary curved line beginning at the top of the cusp of either lower canine teeth and extending posterior along the highest points of buccal cusps of the premolars and molars, to a termination in the border of the head of the condoyle.
CUSP: It is a pointed projection on the occlusal surfaces of posterior and canine teeth.
CUSP-ANGLE: It is the angulations between the cusp-slop and a line drawn across the base of the cusp.
CUSP-HEIGHT: The height of a cusp measured from its base line. NOTE: CUSP-HEIGHT INCREASES WITH CUSP-ANGLE.
CUSPID: A tooth having one cusp. `Canine`
DENTATE: Having teeth* the opposite to edentulous*.
DENTITION: A characteristic arrangement of natural teeth.
DIASTEMA: A space between natural teeth.
DISTAL: The farthest from the centre or median line.
EDENTULUS: Without teeth.
ELCTRO-BRIGHTENING: The process of smoothing and brightening a metal by an electrolytic process which removes material from high spots faster.
ELECTRO-DEPOSITION: The process of depositing a metal on the surface of an impression by means of an electrolyte.
ELECTROLYTE: A compound that decompose when an electric current passes through it.
EMBRAZURE: The open space between the proximal surfaces of two teeth where they diverge buccally, labially from the point of contact.
ENDODONTICS: Treatment of disease of the pulp.
FACEBOW: A bow-shaped frame which fits over the face and registers the maxilla-condoyle relationship.
FEATHERING: An overflow of metal during casting due to two layers of investment separating when heated.
FESTOONING: The reproduction on dentures of the curvature of the gums around the necks of the natural teeth.
FLASH: Excess denture-base material squeezed from the mould during trial closure.
FOSSA: A depression.
FREE-END SADDLE: A portion of a partial denture which is directly retained at one end only.
FREE-WAY SPACE: A small space between upper and lower teeth when the facial muscles are at rest.
GILMORE NEEDLES: An apparatus which has two weight needles for measuring the initial and final sets of plaster.
HYGROSCOPIC EXPANSION: Expansion of a material such as a plaster-bonded casting investment as a result of the absorption of water.
HYPERPLASIA: Over-development of tissue due to denture trauma.
IMMEDITATE DENTURE: A denture which is inserted immediately after extraction of natural teeth.
BITE-BLOCKS (INTEROCCLUSAL RECORD): A record of the normal relationship between either the occlusal surfaces of the teeth/rims.
INTERSTICE: A narrow space between objects which are close together.
INTAORAL: Inside the mouth.
INVEST: To envelop or embed in an investment material.
JACKET CROWN: A veneer of porcelain or acrylic resin which is fitted to the coronal preparation of natural teeth.
LABIAL: Pertaining to the lips.
LINGUAL: Pertaining to the tongue.
MALOCCLUSION: A deviation from normal occlusion of one or more teeth in the dental arches.
MESIAL: Nearest to the centre or median line.
MODIOLUS: A meeting place of the facial muscles near the corners of the mouth.
MONOMER: Single molecule form of methyl-metacrylate.
MUCOSA: The mucous membrane lining the oral cavity.
MUCOCOMPRESSIVE IMPRESSION: An impression which has registered the oral tissue as stressed by a denture in function.
MUCOSTATIC IMPRESSION: An impression which has registered the oral tissue in an unstressed condition.
NEUTRAL ZONE: The space between the tongue on one side and the lips and checks on the other in which the muscle pressure are equal and opposite.
DENTAL PROSTHETICS: The science and art of designing, making and fitting artificial teeth.
RAISE BITE: An increase in the vertical dimension of the denture space beyond that registered by the occlusion.
REFRACTORY: A substance which is heat-resistant.
SADDLE: A section of a denture carrying less than fourteen teeth and which is supported by the underlying tissue.
SWAGE: The process of contouring a piece of sheet metal to a die first by means of a mallet and then by a counter die.
TRACTION: The operation of moving teeth.
UNDERCUT: The tapering section of a tooth which is below the survey line and nearest the gingival.
WETTING AGENT: A soap solution which reduces the surface tension of wax pattern.
DO YOU THAT..
