Tissue /Tooth- tissue supported RPD can't be constructed on a master cast made from a single impression because occlusal forces must be equitably distributed to the abutments and tissues of the ridge. Applying the correct impression technique and material, based on an individual's oral condition, improves the quality of the prosthesis, which may improve quality of life. Impression techniques for removable partial dentures: A review Reeta Jain1,*, Supriya2, Shweta3, Kimmi4 ... achieving successful function of an RPD then becomes one of equilibrating this resiliency differential between the relatively non-resilient periodontal ligament of the 10- Zarb G, Hickey C. Boucher’s Prosthodontic Treatment for Edentulous Patients 9ed. The index fingers are positioned on the tray facing the edentulous areas, and a positive pressure is exerted upon the metallic tray until the alginate impression material sets (Fig. Our method for making impressions should be based on the basic principles of maximum area coverage and intimate contact … This maneuver permits to relate the edentulous ridge to the residual teeth in a functional state. J Am Dent Assoc 1936;23:1271-1278. a negative likeness or copy in reverse of the surface of an object; an imprint of the teeth and adjacent structures for use in dentistry (GPT-6) CLASSIFICATION OF IMPRESSION TECHNIQUES A. Impression making for RPD The key for success in prosthetic dentistry is proper diagnosis and treatment planning followed by proper construction of the prosthesis. 2. The construction of a removable partial denture in distal extension cases is a delicate procedure since the prosthesis is supported by two different tissues, namely teeth and mucosa. However it is possible to maintain the periodontal health with proper treatment and recall. Impression procedures for removable partial denture 1. [9] , [10] In recent years, the shift from analog to digital impression taking has also been implemented into maxillofacial rehabilitation of oncology patients. 2. The technique was previously characterised in the following manner [6, 7]. 9- Hindels GW. Fig. The patient was advised that the best treatment to restore the tooth was a porcelain-fused-to-metal (PFM) crown. 4). Support … https://www.slideshare.net/apurva3011990/impression-techniques-in-rpd Insert the RPD in the mouth and assure that it is properly positioned (Fig. This article reviews various impression techniques that aim to equalize the masticatory load between teeth and edentulous areas thus enhancing the stability of partial denture during function and preserving the residual oral structures. Pour immediately or send it to Dental Prosthetic Services along with the opposing arch, bite registration, and shade if necessary. J Prosthet Dent 1979;41:134-42. Care is taken so that the height of the occlusal rims surpasses the height of the residual teeth in order to ensure a positive and sole contact between the occlusal rims and the impression stock tray later on during the pick-up impression phase (Fig. 1. In-traoral scanning and 3D printing for fabrication of the RPD metal framework is a useful alternative to conventional impression and casting techniques, especially for This paper describes a functional impression technique that aims to equalize the masticatory load between teeth and edentulous areas thus reducing the instability of the partial denture during function and preserving the residual teeth. Step 1: Accurate Impressions. His technique consisted of making a mucostatic impression of the edentulous ridges followed by a pick-up impression with digital compression of the first through holes prepared on the impression stock tray. Various techniques have been described in the literature to help overcome the limitation in mouth opening including multiple impression stages, sectional, and flexible impression trays. Duncan JP(1), Raghavendra S, Taylor TD. Fig. While the metallic tray is being loaded with an alginate impression material (Jeltrate, Dentsply Caulk, Milford, DE), this same material is used to fill the space between the soft tissue impression and the remaining teeth. 1. If the RPD includes anterior teeth, the patient may spend the period between appointments hiding from the world in ... and take the working impression using whatever technique and materials you prefer. 264008, GC America Inc., Alsip, IL) covering the whole arch is chosen (Fig. 2. Clinicians make final impressions of complete dentures (CD) and removable partial dentures (RPD) using different techniques and materials. The tray is tested in the mouth for stability. Impression procedures for removable partial denture Shiji Antony. 6. impression procedures in RPD - View presentation slides online. ** University of Southern California, Los Angeles, Calif. T, Lhe preferred design for major connectors of maxil- lary removable partial dentures is a broad palatal plate or anterior and posterior palatal bars.1"3 … DENTAL TECHNOLOGY SECTION EDITOR DANIEL H. GEHL Impression technique for maxillary removable partial dentures Clyde D. Leach, D.D.S.,* and T. E. Donovan, D.D.S. Based on the theories of impression a) Mucocompressive or definite … The masticatory load is distributed between the ridge and the abutment teeth during function. An individual resin tray is constructed with the self-curing acrylic resin (Formatray; Sybron/Kerr Co, Romulus, Mich) on the edentulous ridges areas of a preliminary cast. Accurate impressioning of these tissues plays a major role in ensuring a well-fitting prosthesis. 1- Applegate OC. 2. The excess material is trimmed away and teeth are freed from any residual impression paste. Impression is basically an interaction between tissues and impression material. The loaded metallic tray is inserted into position over the teeth and the acrylic tray. It was explained to the patient that the best treatment would involve fabrication of the PFM crown followed by a new RPD. Make an impression of the edentulous posterior seg… special Impression procedures for removable partial dentures. IMPRESSION. Evolving Restorative Dentistry with Flow Plus, Unusual Large Submandibular Gland Calculus, Risk of Transmission of Viruses in the Dental Office, Fluoride in dentistry: use, dosage, and possible hazards, The Quest for Esthetic Perfection By Dr. K. William Mopper, Sinus Floor Elevation: an overview of current techniques. After the material sets, the impression is sent to the dental laboratory. Christensen, in a less complicated technique, suggested to take the impression of the edentulous arch with an elastomeric material in a custom tray, then to cover this initial layer and the dentate areas with an elastomeric impression material of lighter-viscosity [6, 7]. 5). 5: The mucostatic impression with the occlusal rims in place. 2. A metallic rim-lock perforated stock tray (Coe Stainless Steel Trays no. Construct the initial custom tray in the form of a “record base” in the edentulous segments, making sure to create index grooves for use as a reference when making an interocclusal record. * DDS, MSBM, DESP. RPD metal framework (Kennedy Class I) using intraoral scanning and 3D printing techniques. Remove the old silicone gasket material. Distal extension removable partial denture (RPD) depends largely on the residual alveolar ridge for support, stability and retention. Impression Techniques, Theories & Objectives. Functional (Dual) impression technique: A RPD creates the potential for plaque formation and increases the risk for gingivitis and periodontitis. Single stage impression -Anatomic form impression ( anatomical form impression) irreversible hydrocolloid (Alginate) Support for tooth borne partial dentures ( CL III; IV) is provided by dento-alveolar segment. 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