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 consent of patients as well as the ethical clearance was obtained from the beginning of the study.
5: Major and Minor Connectors | Pocket Dentistry
The major rpf of FEM is sensitivity of the solution on the geometry of the element such as type, size, number, shape and orientation of elements used. Nandakishore BhojarajuJ. This component also provides the cross-arch stability to help resist displacement by functional stresses. Do not contribute to retention or trapping of food particles.
Creation of the Finite Element Model Step 1 The maxilla was created using the msjor section sketch options. Mxjor aim of this study is to compare subjective patients’ reactions to three maxillary major connectors: The anteroposterior bar connector on the other hand has been described as a configuration that is also commonly used in cases of bilateral bounded saddles Results Fourteen patients Components of a typical removable partial denture are illustrated in Figure Many opinions have been expressed concerning the acceptability to the patients of the various forms of palatal connectors but there have been few investigations.
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. When indirect retention is required, definite rests must be provided for this purpose. It is even possible to vary the properties within an element according to the polynomial applied.
The commonly used major connectors for the maxillary arch are Anteroposterior palatal strap, Palatal strap, Full palatal plate and U-shaped palatal plate. Fig 3c Limiting points on palatal strap. Retention was obtained on connecors abutments. Failure to provide rigid connection can result in uncontrolled and destructive forces on rdp teeth, mucosa, and bone.
The areas where conncetors deflection was observed were almost same. Even though, over the years, it has been observed that patient’s tolerance of the various major connector designs was as great as the number of dentists involved in making the designs 45 it is still imperative to establish the most acceptable maxillary major connector design.
Panagiotouni et al 13 advocated a proper selection of major connector for every case of partial denture so that the major connectors promote the acceptance of the prostheses by the patients.
Stereophotogrammetric Method A rigid plate including evenly spaced lines in 1-cm squares and photogrammetric control points of different heights, and a denture holder prepared from thermoplastic material were used to take photographs. Posterior plastic denture teeth simulating the teeth on the original standard models were selected and set. The film pairs mm apart were superimposed over each other by special analytic equipment Planicomp C, Carl Zeiss and changed to three-dimensional models.
Acceptability of maxillary major connectors in removable partial dentures
It is through this cross-arch tooth contact, which connectos at some distance from the functional force, that optimum resistance can be achieved. During function like mastication and deglutition the framework of the removable partial denture undergo stress and these stress connnectors deform the denture from its final position. However in a recent study of denture wearers all the patients showed a reduced performance in masticatory ability 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 B, Inferior border of the major connector is outlined.
Inn Anterior and Posterior PalatalBar-type Connectors Same disadvantages as the single palatal bar To be sufficiently rigid and to provide the needed support and stability, these connectors could be too bulky and could interfere with tongue function. Were all of the dentures equally easy to tolerate during normal rest?
Rigidity of major connectors when subjected to bending and torsion forces. Cingulum Bar Continuous Bar When a linguoplate is the major connector of choice, but the axial alignment of the anterior teeth is such that excessive blockout of interproximal undercuts must be made, a cingulum bar may be considered. The maxilla geometry is sliced to 10 simple geometry.
Their age ranged from 18 to 60 years. FEM can be easily interpreted in physical terms as well it has a strong mathematical base.
Do not interfere with and are not irritating to the tongue. However in another study 8 the mid- palatal bar was reported to be the least preferred of the major connector design because of ready detection of two prominent transverse margins by the tongue. Fortunately, in only a few situations does extreme lingual inclination of the remaining lower premolar and incisor teeth prevent the use of a lingual bar major connector. The Major connector is the major component of the cast partial denture to which all other connectorx are directly or indirectly attached.