MAJOR CONNECTORS. DEFINITION. The MAJOR CONNECTOR is that part of a RPD that joins the component parts on one side of the arch to those on the. Major Connectors. BDS III year. RPD Lecture. Timing- PM. Dr Deeksha Arya . Associate Professor. Department of prosthodontics. Components of a typical. Major Connectors IN RPD – Download as Powerpoint Presentation .ppt /.pptx), PDF File .pdf), Text File .txt) or view presentation slides online. DENTISTRY-.
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Other studies 16 have shown an increasing popularity of upper acrylic partial denture among some groups of patients. Removable partial denture is a prosthesis fabricated to replace missing teeth and related tissues.
Steps 1 and 2, when completed, provide an outline or designate areas that are available to place components of major connectors Step 4: Maximum deflection was found at the anterior part of the buccal slope in X-axis, occlusal rests and entire saddle area in Y-axis and entire buccal slope on the ridge and centre of the crest in the Z-axis in the A-P un framework.
It provides cross arch stability, which helps to resist displacement by functional stresses.
5: Major and Minor Connectors | Pocket Dentistry
Linguoplate If the rectangular space is bounded by the lingual bar, the anterior tooth contacts, and the cingula, and the bordering minor connectors are filled in, a linguoplate results Figure It is very difficult to separate out the required results from the pile of numbers. A study of linguo-palatal contact during the production of selected consonant sounds. In cnonectors chapter, major and minor connectors are considered separately as to rd function, location, and design criteria.
Published online Dec Retention is provided by a bar type of retentive clasp with arms projecting from the labial or buccal bar and contacting the infrabulge areas on the labial surfaces of the teeth. Introduction Major connector is an important component of removable partial denture RPD.
Some studies show that anteroposterior bars connectoors preferable to anteropalatal bars, U-shaped plates connectkrs preferable to palatal straps, 9 anteroposterior bars are preferable to anteropalatal bars, and palatal plates are preferable to posterior palatal bars. It is generally accepted that a sublingual bar can be used in lieu of a lingual plate if the lingual frenum does not interfere, or in the presence of an anterior lingual undercut that would require considerable blockout for a conventional lingual bar.
Taking into consideration, the class I situation deflections were studied in two maxillary major connector designs. Structurally, the tissue covering the palate is well suited for placement of the connector because of the presence of firm submucosal connective tissue and an adequate, deep blood supply.
C, Impression made with functional movement of the tongue to demonstrate maximum shortening of the floor of the mouth. Model 2—class I—full palate load application. This is similar to other studies 9but there are situations when dentist should insist on them for the health of tissues. Design of Maxillary Major Connectors Comnectors described five basic steps and is certainly rd to most maxillary removable partial denture situations Step 1: A flexible major connector causes an unequal distribution of forces with changes in their intensity and may cause damage to the supporting structures.
The tongue may then pass from one ruga prominence to another without encountering the border of the connector. The only condition preventing their use is when there is an inoperable maxillary torus that extends posteriorly to the soft palate. This is accomplished by lining the ready-made form underneath with a sheet of gauge casting wax rather than altering the original half-pear shape.
Provision must be made connwctors the major connector so that indirect retainers may be attached Step 5: Figure A, Framework for mandibular removable partial denture with the following components: The wider the coverage of a U-shaped major connector, the more it resembles a palatal plate-type connector with its several advantages.
Acceptability of maxillary major connectors in removable partial dentures
The need for indirect retention influences the outline of the major connector Slide Anteroposterior palatal strap in class III and class IV situation showed the least deflection when compared to class I and class II distal extension situation Anteroposterior palatal strap is more rigid connector than the full palatal plate, single palatal strap, and U-shaped palatal strap and can be used in all situations. The consent of patients as well as the ethical clearance was obtained from the beginning of the study.
These results are similar to the ones reported by Wagner and Traweek According to the results of the whole area, palatal plate dentures were deformed the most, and anteroposterior bar dentures were deformed the least among the dentures tested. A palatal plate which was otherwise called a strap in a particular publication was described as the connector of choice in most instances 2 Hard structures such as the mid-palatal suture or mandibular tori Place relief.
Bulk to enhance rigidity results in increased thickness in areas that are a hindrance to the tongue. Hence actual experimental techniques and on trials should techniques such as brittle coatings, strain gauges, holography, stereo-photometry, two and three-dimensional photo elasticity, finite element analysis and other numerical methods. Double embrasure movie Retentive undercuts.
Lingual bar FigureA. As the results of the photogrammetric and fluorescence penetrant liquid inspection test are congruent, it can be suggested that the results of both parts of this study support each other. Therefore, it is ideally suited for the analysis of bibliographical structure because it can model complex geometric shapes and materials, which are not homogeneous.
Oral mucosa covering the edentulous ridge vertically distorts approximately 0. Also the inherent cleanliness of the cast metal base and its resistance to abrasion from cleaning agents contributes to the health of oral tissues when compared with an acrylic resin base 1 Thus rigidity is of paramount to resist flexing and torquing connectorss. The maxilla geometry is sliced to 10 simple geometry.