Copyright 2003, Elsevier Science (USA). All rights reserved. Common DENTAL LABORATORY EQUIPMENT Dr. Ndagire Barbara

Copyright 2003, Elsevier Science (USA). All rights reserved. Unit over view  Major laboratory equipment.  Describe accessory equipment.  Explain laboratory organization… Tutorial  Describe maintenance of dental laboratory…. Tutorial  Maintain a dental laboratory….. Tutorial.  Major laboratory equipment.  Describe accessory equipment.  Explain laboratory organization… Tutorial  Describe maintenance of dental laboratory…. Tutorial  Maintain a dental laboratory….. Tutorial.

Copyright 2003, Elsevier Science (USA). All rights reserved. major laboratory equipment.  Describe components, use, and maintenance of Dental lathe. Vibrator. Plaster trap. Model trimmer. Bench suction machines.  Describe components, use, and maintenance of Dental lathe. Vibrator. Plaster trap. Model trimmer. Bench suction machines.

Copyright 2003, Elsevier Science (USA). All rights reserved. accessory equipment  Describe components, use, and maintenance of Common Laboratory Instruments. Bowls And Base Formers. The Vacuum Mixing Unit. Articulators. Laboratory Heat Sources.  Describe components, use, and maintenance of Common Laboratory Instruments. Bowls And Base Formers. The Vacuum Mixing Unit. Articulators. Laboratory Heat Sources.

Copyright 2003, Elsevier Science (USA). All rights reserved. Explain laboratory organization  Describe arrangement of laboratory.  Describe organization of equipment, materials, and instruments.  Describe laboratory storage.  Describe arrangement of laboratory.  Describe organization of equipment, materials, and instruments.  Describe laboratory storage.

Copyright 2003, Elsevier Science (USA). All rights reserved. Dental Laboratory Equipment  Wall-mounted bins Used to store bulk supplies of plaster, stone, and investment materials.  Work pans Open plastic containers with identification labels used to hold laboratory work in progress.  Wall-mounted bins Used to store bulk supplies of plaster, stone, and investment materials.  Work pans Open plastic containers with identification labels used to hold laboratory work in progress.

Copyright 2003, Elsevier Science (USA). All rights reserved. Dental Laboratory Equipment- cont’d  Heat source A propane or butane torch or Bunsen burner is used for this purpose.  Heat source A propane or butane torch or Bunsen burner is used for this purpose.

Copyright 2003, Elsevier Science (USA). All rights reserved. Dental Laboratory Equipment- cont’d  Model trimmer A machine used to trim stone or plaster models.  Model trimmer A machine used to trim stone or plaster models.

Copyright 2003, Elsevier Science (USA). All rights reserved. Dental Laboratory Equipment- cont’d  Vacuum former Used to construct custom trays for bleaching, mouth guards, and positioners for orthodontics.  Vacuum former Used to construct custom trays for bleaching, mouth guards, and positioners for orthodontics.

Copyright 2003, Elsevier Science (USA). All rights reserved. Vibrator Used to remove air bubbles and to aid in the flow of the plaster or stone when pouring diagnostic models. is used to move dental plaster or dental stone mixes when pouring a cast. The vibrator also increases the density of the mix by eliminating air bubbles. A rheostat control is used to adjust the intensity of the vibration from a gentle agitation to a vigorous shaking. Maintaince: Cover the rubber platform and body of the unit with a plastic cover. As a safety precaution, check the power cord and plug for defects before use. Used to remove air bubbles and to aid in the flow of the plaster or stone when pouring diagnostic models. is used to move dental plaster or dental stone mixes when pouring a cast. The vibrator also increases the density of the mix by eliminating air bubbles. A rheostat control is used to adjust the intensity of the vibration from a gentle agitation to a vigorous shaking. Maintaince: Cover the rubber platform and body of the unit with a plastic cover. As a safety precaution, check the power cord and plug for defects before use.

Copyright 2003, Elsevier Science (USA). All rights reserved. Laboratory Handpiece  Low-speed handpiece used for trimming custom impression trays, adjusting dentures, and polishing provisional and indirect restorations.

Copyright 2003, Elsevier Science (USA). All rights reserved. Dental Laboratory Equipment  cont’d  Sandblaster Hand-held unit that sprays sand at a high speed, creating an etching, or pitting, on a surface area of metal, porcelain, or acrylic.  Sandblaster Hand-held unit that sprays sand at a high speed, creating an etching, or pitting, on a surface area of metal, porcelain, or acrylic.

Copyright 2003, Elsevier Science (USA). All rights reserved. Articulator  A machine that works as close as practical to the way the mouth works.  Articulators are mechanical devices representing the temporomandibular joints, mandible and maxilla, to which casts may be attached and observed in both static and dynamic relationship  A machine that works as close as practical to the way the mouth works.  Articulators are mechanical devices representing the temporomandibular joints, mandible and maxilla, to which casts may be attached and observed in both static and dynamic relationship

Copyright 2003, Elsevier Science (USA). All rights reserved. Uses  Diagnosis for analysing a patient’s occlusion outside the mouth.  Their facility to copy mandibular movements and positions also assists in the fabrication of restorations in the laboratory.  Diagnosis for analysing a patient’s occlusion outside the mouth.  Their facility to copy mandibular movements and positions also assists in the fabrication of restorations in the laboratory.

Copyright 2003, Elsevier Science (USA). All rights reserved. Classification  Based on their relative abilities in copying mandibular movements: Average value Semi-adjustable Fully-adjustable  In addition, there are simple hinges and other cast relators which may be used for locating casts in one position, but which are not capable of simulating mandibular movents  Based on their relative abilities in copying mandibular movements: Average value Semi-adjustable Fully-adjustable  In addition, there are simple hinges and other cast relators which may be used for locating casts in one position, but which are not capable of simulating mandibular movents

Copyright 2003, Elsevier Science (USA). All rights reserved. Cast relators Simple hinges venticulators

Copyright 2003, Elsevier Science (USA). All rights reserved. Average value articulators

Copyright 2003, Elsevier Science (USA). All rights reserved. Semi-adjustable articulators Denar MKII Arcon

Copyright 2003, Elsevier Science (USA). All rights reserved. Semi-adjustable articulators Whipmix Arcon

Copyright 2003, Elsevier Science (USA). All rights reserved. Semi-adjustable articulators Sam Arcon

Copyright 2003, Elsevier Science (USA). All rights reserved. Dental lathe  Used to polish or trim custom trays, provisional coverage, dentures, and indirect restorations.

Copyright 2003, Elsevier Science (USA). All rights reserved. Bunsen Burner & Lighter Bunsen Burner Flint

Copyright 2003, Elsevier Science (USA). All rights reserved. Dental Surveyor Dental surveyor Using the analyzing rod Marking survey line with a graphite marker Undercut gauge Blocking out undercuts

Copyright 2003, Elsevier Science (USA). All rights reserved. Instruments Wax spatulas Mixing spatulas Rubber bowls Wax spatulas Mixing spatulas Rubber bowls

Copyright 2003, Elsevier Science (USA). All rights reserved. Instruments needed  Impression in tray (stock /custom tray)  Plaster/mixing bowl  Dental stone/plaster  Plaster/Spatula  Plaster knife  Vibrator*  Impression in tray (stock /custom tray)  Plaster/mixing bowl  Dental stone/plaster  Plaster/Spatula  Plaster knife  Vibrator* Laboratory spatula Plaster knife

Copyright 2003, Elsevier Science (USA). All rights reserved. Dental Models  Three-dimensional reproductions of the teeth and the surrounding soft tissue of a patient’s maxillary and mandibular arches. Also referred to as study casts.

Copyright 2003, Elsevier Science (USA). All rights reserved. Hydraulic Flask Press  Accommodates 3 flasks. Apply pressure up to 3500psi for trial pack and final closure. Tempered steel construction. Leak- proof.

Copyright 2003, Elsevier Science (USA). All rights reserved. Vacuum mixing machine

Copyright 2003, Elsevier Science (USA). All rights reserved. Model with waxed crown patterns

Copyright 2003, Elsevier Science (USA). All rights reserved. Investment oven