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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The solid geometry is created through form feature option sweep along guides. Effect of partial denture design on bilateral force distribution. Published online Dec In this chapter, major and minor connectors are considered separately as to their function, location, and design criteria.
The greatest damage the partial denture can produce is from a flexible major connector. For a single palatal bar to be effective, it must be rigid enough to provide support and crossarch stabilization and must be centrally located between the halves of the denture. Jan 17, Posted by mrzezo in Prosthodontics Comments Off on 5: Anterior part of the buccal slope in the X-axis showed maximum deflection and occlusal rest, crest cobnectors the ridge and the buccal slope together un deflections, since it is subjected to greater stresses because their support is a combination of tooth and soft tissue.
The maximum displacements in the vertical direction under a specified vertical load was found in class I full palate, smallest maximum displacement was found in class IV Anteroposterior palatal strap. The tongue may then pass from one ruga prominence to another without encountering the border of the connector. In the maxillary arch, because no moving tissue is present in the palate as in the floor of the mouth, the borders of the major connector may be placed well away from gingival tissue.
5: Major and Minor Connectors | Pocket Dentistry
Using the finite element system static load was applied to the various designs of chrome cobalt partial denture frameworks on the saddle area. However, when auxiliary splinting is used for stabilization of the remaining teeth or for horizontal stabilization of the prosthesis, or for both, small rectangular spaces sometimes remain. Thus rigidity is of paramount to connectors flexing and torquing forces.
During conmectors rest 14 patients Anterior-posterior palatal bars Single Palatal Strap: Fig 4b Microcracks arrow in the palatal strap major connector. This method is a way of getting a numerical solution to specific problem. U-shaped Palatal Connector Slide When the future replacement of one or more incisor teeth will be facilitated by the addition of retention loops to an existing linguoplate.
The nonbearing areas are the lingual gingival tissue within 5 to 6 mm of the remaining teeth, hard areas of the medial palatal raphe including toriand palatal tissue posterior to the vibrating line Slide The deformation properties of major connectors were comparatively analyzed by two methods. But when compared between the two, later showed more deflection than the former.
In a class 4 situation the Anteroposterior palatal strap was only studied for deflections, here maximum deflection was seen at distal rests and the distal most part of the palatal strap. Be fabricated of uniformly thin metal Have accurate anatomic reproduction of the ruggae improves strength and rigidity. Outline the superior border of the major connector FigureC. Both showed deflections which were maximum at the crest of the ridge on the saddle area and the entire plate excluding the posterior palatal strap.
Photographing procedures were carried out both before comnectors and after each loading period, and the black-and-white film was developed with Kodak solution for the photogrammetric film process stereophotographs.
Mandibular Major Connectors The six types of mandibular major connectors include the following: Model 1—class I—anteroposterior palatal strap load application. Creation of the Finite Element Model Step 1 The maxilla was created using the cross section sketch options.
Finite element methods have been proved to be one of the best methods for research [ 5 ]. Linguoplate is made as thin as possible and should follow the lingual ln of the teeth contacted.
Study of Deflections in Maxillary Major Connectors: A Finite Element Analysis
Figure Interrupted linguoplate in the presence of interproximal spaces. The greatest damage an RPD can produce is that which results from a flexible major connector. Sometimes a dentist is faced with a clinical situation wherein a linguoplate is indicated as the major vonnectors of choice even though the anterior teeth are quite spaced and the patient strenuously objects to rrpd showing through the spaces.
At the same time, because of its anterior location, the cross-sectional area is not affected as much as in the palatal plate and palatal strap major connectors during the waxing stage; therefore, it is placed third in decreasing order of deformation amount. The linguoplate can then be constructed so that the metal connecctors not appreciably show through the spaced anterior teeth Figure A correctly designed linguoplate will engage the remaining teeth to help resist horizontal rotations.
Failure of the major connector to provide rigidity may be manifest by traumatic damage to periodontal support of the abutment teeth, injury to residual ridges, or impingement of underlying tissue. It is a part of the partial denture to which all other mxjor are directly or indirectly attached 12.
Cover same area as complete denture posteriorly point to hamular notch if distal extension Have large surface area of mucosal contact improves potential for retention. Contraindications include interfering lingual tori, high attachment of a lingual frenum, and interference with elevation of the floor of the mouth during functional movements.
Its uniform thinness and the thermal conductivity of the metal are designed to make the palatal plate more readily acceptable to the tongue and underlying tissue. But as a U-shaped plate major connector covers the inclined surfaces, it can only resist a very small part of the chewing force. The anterior-posterior lengthening of the denture base provides added stability while the greater the space in between the bars the less irritating they are for the tongue 6.
It contributes to the support mjaor bracing of a partial denture by distributing functional loads widely to the teeth, and in case of the maxilla, to the mucosa. Conbectors of the Maxillary Cast: Questions Metal bar Metal plate Acrylic plate Which denture interfered least with speaking? Doing so will often result in a scalloped superior margin. In the photogrammetric part of the study, 1, coordinate points were used for calculating the whole area volume on three-dimensional models.
The strength of this major connector design lies in the fact that the anterior and posterior components dpd joined together by longitudinal connectors on either side, forming a square or rectangular frame. Table 2 Patients’ assessment of dentures that interfered least with functions.
Sublingual bar FigureC. Each denture was to be worn for five days.