Immediate temporary fixed partial dentures.
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A procedure is presented for the construction of a direct provisional acrylic resin restoration by means of an interocclusal wax impression. This technique requires no preparation or laboratory time and quickly results in a restoration that accurately covers all margins of the preparation and restores proper contact, contour, and occlusion. This procedure can also be used for large restorations, immediate fixed partial dentures, final impressions of preparations, provisional crowns to fit existing removable partial dentures, and some office emergencies.
Perio-prostheses that have failed can often be salvaged after abutment teeth are extracted to be "converted" to immediate provisional removable prostheses. Beyond convenience, such prostheses can often be superior to conventional laboratory constructed immediate temporary prostheses.
A clinical technique for the immediate replacement of an extracted anterior tooth was presented. The clinical crown of the patient's extracted tooth was used as a pontic by attaching it to the adjacent teeth with acid-etch bonded resin. This technique provides a practical and esthetic immediate fixed tooth replacement that requires minimum materials and time.
Obturators used in the rehabilitation of large defects of the upper jaw should be easily made to produce a comfortable and stable prosthesis. This goal has been difficult to achieve by using traditional materials and techniques. This article describes a technique to overcome these problems by using a visible light-cured resin. Results indicate that resultant obturators are easily and quickly constructed, and provide a light, comfortable, and well-tolerated prosthesis.
A technique for constructing a provisional removable partial denture before and during construction of an anterior splint bar prosthesis is described. The provisional prosthesis is easily adapted to fit the splint bar prosthesis after it is cemented in place. The technique assures that the patient will enjoy the benefits of a well-fitting and esthetic provisional restoration through all phases of construction of the splint bar and the final removable partial denture.
Objectives of treatment of the oral manifestations of cleidocranial dysostosis should include restoring the vertical dimension of occlusion, building out the maxilla, establishing of functional occlusion, improving appearance and phonation, and improving the patient's mental well-being.
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The incorporation of the use of provisional removable complete and partial prostheses is an extremely valuable diagnostic and therapeutic modality in the comprehensive rehabilitation of the partially and fully edentulous patient. There is no question that the use of this restoration addresses many of the chief complaints of patients in a timely fashion and, in so doing, builds a high degree of confidence in the dentist by the patient. The evaluation of the provisional restorations and their subsequent refinement results in a higher quality, more predictable definitive restoration. Experience has demonstrated that postinsertion problems are reduced with the definitive prosthesis following successful therapy with the provisional restoration. The provisional prosthesis is also valuable as a "spare" denture after insertion of the definitive prosthesis. The role of the provisional removable prosthesis is readily understood and accepted by most patients, and the appropriate use of these restorations in prosthetic dentistry is an indication of a high-quality, highly individualized, and service-oriented dental practice.
Long term observations show, that acrylic partial denture find at the abutments with hook clasps cause more trauma to the periodontal tissues and the denture-bearing area than other removable partial dentures. In this connection it must be considered, whether the acrylic partial denture being a temporary prosthesis, is planned, prepared and manufactured with the same dental and technical accuracy as a definite removable prosthesis. Presuming that the planning, manufacturing, and the shaping of the acrylic partial denture follows the principles of stabilizing function and periodontal hygiene, less trauma on the structures of the masticatory system and therefore an extended indication seems to be possible. To make this evident, the following essential rules of treatment and design are presented: functional impression of the denture bearing mucosa, bite registration, extension of the prosthesis, clasps and recall.
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A longitudinal electromyographic (EMG) investigation was performed on thirty subjects provided with an immediate complete upper and a partial lower denture. Electromyographic recordings in maximal clench, light tapping and postural position were obtained from the anterior temporal and masseter muscles before final extractions and 7 weeks, 6 months, 1 year and 2 years after denture insertion. The maximal clench activity of the jaw closing muscles showed an average tendency to decrease upon insertion of the dentures, but thereafter significant increases in mean voltages were observed during the first year of denture wear. During the second year no significant changes in EMG clenching force were noted. At the 2-year stage most of the muscles showed significantly greater clench activity than at the post-insertion stage, but did not exceed the pre-extraction level. The jaw muscle activity in light tapping showed no significant mean changes during the observation period. The postural activity tended to decrease during the period of denture wear, the decrease being significant for some of the muscles at the 2-year stage.
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