![]() CATEGORIES: BiologyChemistryConstructionCultureEcologyEconomyElectronicsFinanceGeographyHistoryInformaticsLawMathematicsMechanicsMedicineOtherPedagogyPhilosophyPhysicsPolicyPsychologySociologySportTourism |
Tasks for independent work during preparation to practical classes.Ministry of Public Health of Ukraine Higher State Educational Establishment of Ukraine "Ukrainian Medical Stomatological Academy"
"Approved" at the meeting of the department propedeutics of Prosthodontics Head of the department Associate Professor, Korol D.M. _________ "_____"_______________ 20___
RECOMMENDATIONS FOR STUDENTS’ independent WORK during the preparation to practical classes
Poltava 2011
1. Actuality of the theme: Analysis of the literature indicates that the leading place in removable prosthetics take partial removable laminar dentures However, their manufacturing is time-consuming and complex process that requires from the medical and dental technician specialized professional approach to all clinical and laboratory stages of their manufacturing and rational grounded application of the basic and auxiliary materials. It is known that for manufacturing of various designs of dentures is necessary to obtain a high-quality impressions and patterns. With a wide range of impression material, you need to know their composition and properties to choose the one that best of all fits the stated objectives of orthopedic treatment. Manipulation of obtaining an impression and a model is a clinical task on the quality of which depends the success of orthopedic surgery. 2.Specific objectives: 3.Base level of training:
Tasks for independent work during preparation to practical classes. 4.1. Recommendations for students’ independent work and album for independent work of students. 4.2 Theoretical questions to the lesson: 1. Indicationsis to all removable partial dentures fabrication. 2. Contra-indication is to all removable partial dentures fabrication. 3. Components of all removable partial dentures. 4. Clinical stages of all removable partial dentures fabrication. 5. Laboratory stages of all removable partial dentures fabrication. 6. Positive and negative properties of all removable partial dentures. 7. Definition of the impression. 8. Classification of the impressions. 9. Definition of the casts. Steps of cast making. 4.3. Practical works (tasks) that are executed at the lesson: By means of diagnostic models, thematic patients demonstratively examined students: 1. indication and contra-indication to all removable partial dentures fabrication. 2. sequence and maintenance of the clinical stages of all removable partial dentures fabrication. 3. sequence and maintenance of the laboratory stages of all removable partial dentures fabrication. 4. Take impression 5. make cast Content of the theme: Impressions and models making. Classification of the impressions by Gavrilov 1 group - 2 group -
Full, Pressure techniques ( mucocomressive) Partial Selective pressure Bite registration Minimal pressure No Pressure ( mucostatic)
Anatomical impressions leave out of account mobility of mucous membrane and are made by using stock impression tray. Functional impressions take into account mobility of mucous membrane and are made by using special tray. The aim of the functional impression is to maximize the rest area of the denture base taking the muscle movements into consideration. Impression trays Impression tray A receptacle or device used to carry the impression material to the mouth, confine the material in apposition to the surfaces to be recorded, and control the impression material while it sets to Form the impression. There are two types of impression trays: 1. Stock impression tray 2. “custom” impression tray (also be called “special” or “individual” trays). Stock impression trays Stock trays come in a variety of designs and sizes. These trays fall into three main types: Full dentate trays There are a variety of sizes to suit most patients. Stock trays can be made of metal (not disposable) or plastic. The plastic trays are intended to be disposable. Advantages (metal stock trays) • designed to be used many times Disadvantages • the problem in using stock trays is that the impression material is of various thickness which can lead to distortion Impression tray consists of body, handle and flanges. Upper impression trays have a palatal section; which is, of course, absent in lower trays. Very often it is not possible to obtain an accurate impression with a standard tray. In such cases a model obtained from the first impression is used to make a special tray. With this “made to measure” individual tray perfectly accurate final impression can be taken. Date: 2015-12-24; view: 1330
|