REMOVABLE PARTIAL DENTURE

Removable Partial Denture

Removable Partial Denture

Introduction

When accomplishing oral rehabilitation with removable partial dentures (RPDs), the target of the dental surgeon should be to make a prosthesis that the persevering can effortlessly chair and eliminate from the mouth and yet, when seated, the prosthesis will oppose the dislodgment promise initiated by masticatory function, particularly mastication of tacky foods. The difficulty engages an interaction of technology and biologic components, so a biomechanical approach should be utilised for its solution. On this cornerstone, it is imperative that diagnostic casts for all RPDs be investigated with a dental parallelometer (surveyor), the equipment that allows unquestionable designing of each functional minutia of the prosthesis. (Rudd 2008:536-549)

A diagnostic cast should be reviewed for three foremost reasons: (1) conclusion of the route of insertion to get effective and esthetically satisfying retentive clasps; (2) finding the review line to endow positioning of the rigid components of the prosthesis, so they will chair without interference; this method presents data about the need to recontour the abutments and other teeth and to advance the functioning of rigid components and the esthetic facets associated to it; and (3) investigation of the contour of supple tissues to avert the incident of lesions that outcome from seating the prosthesis. The use of a dental surveyor allows the dental surgeon to design, study, and conceive an RPD that will supply ample retention, support, steadiness, and esthetic appearance. (Ahmad 2002:59-64)

In 1954, Applegate commented that the smart use of the dental surveyor is the best way to avert the incident of countless difficulties often associated to oral rehabilitation with RPDs. However, every day communicate with professionals in our locality displays that there are numerous dentists who have no dental surveyor and are ignorant of the significance of its use when they are making RPDs, because they accept as factual the technician may be more skilled and they select to delegate the blame to the technician. (Bezzon 2007:412-418)

Path of insertion and removal

The RPD route of insertion and departure is the main heading in which the prosthesis moves in relative to the support scheme when it is seated in or taken from the mouth, directed by the communicate of its rigid components with the abutments. Thus the contours of the teeth that communicate the constituent components of the RPD have a resolute leverage on the conclusion of the perfect route of insertion and withdrawal. Because the routes of insertion and departure engage identical movements but in converse main headings, they may be mentioned to only as the route of insertion. (Bezzon 2007:412-418)

To work out the route of insertion for any RPD, the diagnostic cast should be positioned on the cast holder and investigated in relative to the upright rod (surveying stylus) of the parallelometer (surveyor) (Fig. 1).

Fig. 1: Parallelometer (surveyor)

The upright action of the reviewing stylus comprises the route of insertion itself, which alterations with each new inclination granted to the diagnostic cast on the adjustable cast ...