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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Maxillary Major Connectors Six basic types of maxillary major connectors are considered: In the photogrammetric part of the study, 1, coordinate points were used for calculating the whole area volume on three-dimensional models. The anteroposterior bar connector on the other hand has been described as connctors configuration that is also commonly used in cases of bilateral bounded saddles The evaluation of difference between the points on the posterior median line and the special points jn join the posterior margin to saddles showed significant differences for the palatal plate design on the left side and only after the first period; for the palatal strap design the difference was significant on the right side for all loading periods; and for the anteroposterior bar design the difference was significant on the right side at baseline and connecfors the third loading period Table 1.
It is through the major connector that cohnectors components of the partial denture become unified and effective. An SMK stereometric camera, designed for recording three-dimensional close-range objects in measureable form, 18 with Avipan glass film Agfa was used to photograph tissue surfaces.
FEM can be easily interpreted in physical terms as well it has a strong mathematical base. However, such a design may be as much of a food trap as the continuous bar type of major connector. It should not be irritating to tissues It should not interfere with tongue It should be rigid enough to uniformly distribute the occlusal forces acting on any portion of the prosthesis without undergoing distortion Slide 5: The model was assigned the material properties.
Acceptability of maxillary major connectors in removable partial dentures
The greatest damage an RPD can produce is that which results from a flexible major connector. It was however advised that the active speech area should be avoided when possible Lingual bar with cingulum bar continuous bar FigureD.
B, Cingulum bar continuous bar major connector. Single Palatal Strap Bilateral tooth-supported prostheses, even those with short edentulous spaces, are effectively connected with a single, broad palatal strap connector, particularly when the edentulous areas are located posteriorly Such a connector can be made rigid without objectionable bulk and interference with the tongue provided the cast framework material is distributed in three planes Slide These results are similar to the ones reported by Wagner and Traweek Do not substantially alter the natural contour of the lingual surface of the mandibular alveolar ridge or of the palatal vault.
All the 15 patients treated in this study reported that the maxillary major connectors interfered with speaking. To provide a visible finishing line for the casting Slide Fifteen consecutive patients attending the prosthetic out-patient clinic of the Dental Center, University College Hospital, Ibadan who had never worn dentures were recruited into the study.
Single Palatal Bar Most widely used and yet the least logical of all palatal major connectors.
In either instance, the superior border of a lingual bar would have to be placed too close to the gingival tissue. Similarly, all the patients reported that the three maxillary major connectors were not equally easy to tolerate during normal rest.
Variability in dentists designs of a removable maxillary partial denture. Many opinions have been expressed concerning the acceptability to the patients of the various forms of palatal connectors but there have been few investigations. The principle of leverage is connected with this component part.
Major Connectors. – ppt video online download
Selection of a major connector for the extension base removable partial denture. U-shaped Palatal Connector Slide The major connector should be rigid. Compare subjective patients’ reactions to three maxillary major connectors: The original uniform thickness of the plastic pattern is thus maintained.
Palatal plate-type connector 4. The fluorescence penetrant liquid inspection test was used to majot the surface microcracks. The effectiveness ranking of the major connector types in decreasing order of the amount of deformation were: Location Major connectors should be designed and located with the following guidelines in mind: All castings were radiographed and found to be free of porosities and voids.
Single Palatal Strap Bilateral tooth-supported prostheses, rrpd those with short edentulous spaces, are effectively connected with a single, broad palatal strap connector, particularly when the edentulous areas are located posteriorly Such a connector can be made rigid without objectionable bulk and interference with the tongue provided the cast framework connecctors is distributed in three planes.
5: Major and Minor Connectors
The superior border of a lingual bar connector should be tapered toward the gingival tissue superiorly, with its greatest bulk at the inferior border, resulting in a contour that has a half-pear shape.
The patients were requested to fill the questionnaire after the three – week evaluation period.
Nandakishore BhojarajuJ. Rigidity of major connectors when subjected to bending and torsion forces. References The major connector joins the components of a removable partial denture RPD on one side of the arch to those on the opposite side.