The tray should cover maxillary tuberosities and retromolar pads. Trays are selected, keeping in mind that proper fitting trays will allow the clinician to obtain all structures, including teeth and soft tissues. Patient should be seated in an upright position. Taking Alginate Impressions Positioning of Patient and Selection of Trays sufficient strength to avoid tearing material upon removal from the mouth, and. ![]() The following are characteristics of an ideal alginate impression material: Alginate is the most universally utilized impression material in dentistry. ![]() They are also used to fabricate bleaching trays and mouth guards. Alginate impressions are taken to obtain diagnostic study models, which are the positive reproductions of the teeth and surrounding structures. Therefore, it can never return to its original state of powder and water. Alginate is also referred to as an irreversible hydrocolloid because once it is mixed a chemical reaction occurs, known as gelation. It solidifies into an elastic mass capable of producing a negative reproduction of the oral cavity (an impression) (Poling et al. This colloidal material forms a gel when the powder is mixed with water. It is used to take primary or preliminary impressions. It is also comprised of sodium alginate, calcium sulfate, and retarders. Wear whitening trays for 1 hour, once a day for 14 daysĭo not eat or drink for half an hour after, avoid anything that can stain a white t‐shirtĪlginate is an elastic hydrocolloid impression material made from seaweed. Soft bristle brush/ Modified Bass technique If sensitivity should occur, recommend dentifrice containing evidence based desensitizing agents (potassium nitrate, calcium sulfate) Instruct patient that whitening should be done before redo of composites, since composite restorations will not whiten. Stress importance of maintaining recare visitsĭiscuss homecare technique for whitening trays Refer to Doctor of Dental Surgery (DDS) for tooth #8, redo of existing Class III composite, tooth #9 redo of existing Class IV and Class III composites, possible future laminates Localized scaling and root planing with 4 to 8 week periodontal re‐evaluationĪlginate impressions for fabrication of whitening trays Localized periodontal disease, poor oral hygiene managementĤ–5 mm periodontal pockets on teeth #2, #14, #15, #18Ĭoffee and wine, biofilm accumulation, poor oral hygiene managementĮvaluate soft and hard tissue for evidence of smoking Lack of orthodontic intervention and malocclusion Teeth present with yellow extrinsic stain due to age, coffee, and wine. Tooth #8 has caries, which has extended into dentin and can be seen on the radiograph. Localized inflammation is present in the areas of teeth #2, #14, #15, and #18 with slight localized bone loss on interproximal surfaces of teeth #2, #14, and #15. The patient’s general oral health is fair. ![]() Posterior periapical of teeth #2, # 14, #15, and #18, molar and premolar bitewings were also prescribed but not shown ( Figure 8.3.1).įigure 8.3.1: Radiographic image teeth #8 and #9. ![]() She brushes twice daily, but flosses occasionally.Ģ mm maxillary overjet Class (II) occlusionĪnterior periapical was prescribed for tooth #8, #9. Tooth #9 also presents with a composite overhang on the mesial and distal surfaces. She is not interested in retreatment.ĭental examination reveals a Class III distal composite on tooth #8 with a slight open margin and recurrent caries, tooth #9 reveals a large Class IV mesial‐facial‐incisal composite with open margins and recurrent caries, as well as a Class III distal composite with an open margin and recurrent caries. Patient completed orthodontic treatment 30 years ago and only wore retainer for first year after completion of treatment. Periodontal charting was completed and reveals five areas of probing depths 4 mm or greater, #2 distal with a reading of 5 mm, #14, distal with a reading of 5 mm, #15 distal with a reading of 5 mm, and #18 mesial and distal with a reading of 4 mm. No abnormal findings with respect to intraoral structures, mucosa, and gingiva. She drinks two to three glasses of red wine on weekends, and drinks two cups of coffee daily. The patient has a prior history of smoking. The patient is not taking any medications. The medical history reveals no significant findings.
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