2 disto buccal open and close against pressure 3

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Precision Machining Technology
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Chapter 3 / Exercise 11
Precision Machining Technology
Hoffman/Hopewell
Expert Verified
(2) Disto-buccal – open and close against pressure. (3) Distal – drape cheek and move mandible side to side. (4) Buccal – drape cheek.
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Precision Machining Technology
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Chapter 3 / Exercise 11
Precision Machining Technology
Hoffman/Hopewell
Expert Verified
8 (5) Buccal frenum- drape cheek. (6) Labial – drape lip. (7) Labial frenum – drape lip. b. Mandibular (1) Distal – open and close, also note shape of retromolar pad. (2) Disto-buccal – open and close and drape cheek. (3) Buccal – drape cheek. (4) Buccal frenum – drape cheek. (5) Labial and labial frenum – drape lip. (6) Sublingual including lingual frenum – wipe lips with the tongue and place tongue in the anterior palate. (7) Mylohyoid – tongue in the opposite cheek. (8) Retromylohyoid an distolingual – swallow, tongue to lip and into opposite cheek. The patient should not protrude the tongue beyond their lips as this is an exaggerated movement and will result in under extended borders. 3. Verify the position of the vibrating line. a. Remove 3-4 mm of the wax spacer along the posterior border. b. Add stick compound in this area and heat, temper and insert. The patient should open and close against pressure if the pterygo-maxillary notches are involved c. Trim the excess compound and check the vibrating line with the sanitary markers. DO NOT TRIM THE PTERYGO-MANDIBULAR NOTCHES. The posterior border should generally make a smooth concave curve from notch to notch. 4. Prepare the custom trays for the final impressions. a. Reduce all compound borders ~1mm on the inside except the posterior palatal seal area. This area is not to be relieved. b. Gently round the borders with the edge of the #21 blade, but do not reduce appreciably in height as this will destroy your border molding. c. Gently remove the wax spacer d. Tray adhesive is generally not recommended for the edentulous impressions. 5. Making the final impression a. Make sure there is an adequate amount of material in the Aquasil automix cartridge, properly loaded in the dispensing gun with a new mixing tip. b. Dry the mouth thoroughly and leave the gauze in the mouth while loading the tray with the impression material. Remember the tray should only need a thin ~3-4 mm uniform thickness of impression material. c. Seat the maxillary tray immediately on removal of the gauze. The anterior should be seated first and then the posterior until the material starts to escape along the posterior border. Final border molding can be accomplished shortly after insertion when the material is still able to slightly flow. Then the tray should be held steady until final set ~5-7 minutes.
9 d. For the mandibular impression, the loaded tray should be centered and seated lightly over the mandibular ridge. Hold the tray steady with the index and middle fingers of one hand. Border mold buccal and labial with the free hand. The entire lingual is border molded by having he patient lay their tongue on the lower lip while the material is setting ~5-7 minutes.

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