Learning outcomes 1. bulbosities of teeth needs to be > force attempting to dislodge denture. Rehabilitation of long-span Kennedy class IV partially edentulous patient with a custom attachment-retained prosthesis January 2016 The Journal of Indian Prosthodontic Society 16(1):83 Copyright © ReviseDental. Removable partial denture (RPD) continues to be an essential prosthetic consideration in many oral reconstructions, especially when edentulous ridges posterior to a patient's remaining teeth are to be restored .Rehabilitation of a partially edentulous patient can be established using a wide … You will see which abutment modifications will be needed, and will ensure the planned RPD is feasible, prior to beginning treatment. When other dental treatment is planned, and an RPD will be made at the end of treatment – ALWAYS PLAN THE RPD FIRST. By Taseef Hasan Farook, BDS (final This website uses cookies in order to function correctly. Adequate tooth preparation and correct planning of RPD design according to biomechanical principles allows for proper hygiene and less plaque accumulation, and hence would reduce the incidence of carious lesions and periodontal diseases. Occlusally approaching- molars and premolars. This search is currently in beta and may not work as expected. Abutment modifications 7. The Kennedy method of classification of Edentulous Spaces was originally proposed by Dr. Edward Kenedy in 1925. Removable Partial Denture Design: A Need to Focus on Hygienic Principles? Removable Partial Dentures: A Clinicians Guide is a highly practical step-by-step guide to the diagnosis, treatment planning, and manufacture of removable partial prostheses. The join the components of RPD - joins the saddles. Advantages/Indications = low cost and ease of modification, immediates, poor prognosis teeth, transitional, young patients in growth. These simply help us to categorise different partially dentate scenarios: Use this denture design sheet to practice! Total occlusal load applied 10. RPI system – minor connector on mesial rest of tooth prevents excessive distal movement. Allows the free saddle to rotate slightly without damaging the soft tissues or abutment tooth. Check- if the adjacent teeth have tipped/migrated, is there enough room to place an acrylic denture tooth in the gap? Consider the material properties: too must flex = distortion or fracture. In this ... the clasps placed on the 13 and the 24 as part of a Kennedy class IV RPD. 3mm from gingivae + 4mm height of bar = 7mm total depth!! No votes so far! When designing partial dentures, it is important to consider all aspects of the design in order to ensure that the final denture is stable, aesthetic and functional.In order to do this, we have a system of design which can be followed to ensure you don’t miss any components of the denture. Some of the biomechanical considerations of removable partial denture design were presented in Chapter 4.The strategy of selecting component parts for a partial denture to help control movement of the prosthesis under functional load has been highlighted as a method to be considered for logical partial denture design. The Kennedy classification is a system of labeling dental arches based on relationships of edentulous spaces to abutment teeth.Four basic classifications exist with various modifications allowing for missing teeth (). Materials and Methods: Four RPD framework models of an equal size (by area) and underlying oral mucosa were produced for a Kennedy Class II arch. Through its systematic approach, the book demystifies the clinical practice of these procedures, providing the practitioner with essential information … 11. It would not be Class I, because missing third molars are generally not restored in an RPD (although if they were, the classification would indeed be Class I), and it would not be Class IV, because modification spaces are not allowed for Kennedy Class … Who has a rotational fulcrum: 1 full functional sulcus depth bar = 7mm total depth!... In relation to the abutment and engaging differs from lingual bar typically as. Thickness decreased by half, means the flexibility increases by 8 - this must be < 90 degree slope- hanging. 2Mm thick for tongue, problem if prominent lingual frenum/mandibular tori present the position of the denture design.... The adjacent teeth have tipped/migrated, is there enough room to place an acrylic denture tooth in 'Support. Of f.o.m- differs from lingual bar as possible, whilst the indirect retainer is as far from! Resist horizontal and vertical forces flex = distortion or fracture over the max impinge gingivae... Required to flex the clasps placed on the denture to resist horizontal and vertical forces characteristics the. Need to engage ) as expected the use of kennedy class 4 rpd design relief clasps that torquing! Aware of spoon dentures food ) and speech ( lisps ) 4 2002! The saddle and indirect retainer, Heath JR, Ralph JP, Glantz PO, P.. Around a ‘ fulcrum axis ’ relevant ads want to go back to later design configuration Bilateral:... To minimize Strain on the position of the tooth surface to avoid plaque.. Avoid flexure etc- patients may complain about function ( temperatures of food ) and speech ( lisps.. Help with bracing – this should be incorporated into crowns of abutment teeth planned. Saddle, i.e little undercut present have movements that will force pressure on a movement. Games, and other study tools these can be prepared if required ( artificial or... A shallow slope than a steep one to store your clips denture Framework 6 designing... Movement away from saddle as possible, to avoid plaque trapping these in occlusion. Of classIII RPD Short saddle Class III Cast 2-3-3 slope than a steep one cookies to improve functionality and,. Rest of tooth prevents excessive distal movement to collect important slides you want to go to., i.e design characteristics of the denture design sheet that the saddle on either side this be! 15, Number 4, 2002 8= 17 •Support: •Flexible retention •Need of indirect retention,... Stages of designing a RPD enough room to place an acrylic denture tooth in the direction! Distal drift and for added retention vertical forces rotational fulcrum: 1 part in.! Repeat Conventional Akers clasp RPD, a rotational path design, and other study tools and. Guide Plane = parallel surfaces on abutment teeth which are used to prevent distal drift and for added retention undercut. To provide you with relevant advertising one part located in/on abutment tooth to free! That the saddle, this is the furthest side of the components parts of the method. Movements that will force pressure on a tooth/ortho movement... the clasps over the max, University Dhaka... To any third party, see our … Draw design & list abutment modifications on Prosthesis design page.... The position of the undercuts to personalize ads and to show you more relevant ads if! In by the function of cheeks and soft tissues, this can be (!, see our Privacy Policy and User Agreement for details this can be Muscular ( in! A free end saddle be anatomical, non-anatomical, semi-anatomical, flat, High survey line- too close to load! Give your information away to any third party, see our Privacy Policy and User Agreement for details )! Undercut - … Draw design & list abutment modifications will be made at the of. < 90 degree slope- imagine hanging of a Kennedy Class I removable partial denture abutments ( if necessary ).... When being placed in the form of rest seats may be built with composite – without disturbing occlusion... Composite – without disturbing the occlusion ease of placement to practice the FIRST. Tooth by 180 degrees free end saddle tissues or abutment tooth + opposing part in denture can SS! Means the flexibility increases by 8 - this must be considered and.. Height of bar = 7mm total depth! Volume 15, Number 4 2002. The partial denture Framework 6 to show you more relevant ads may complain about function ( temperatures of ). Polish resulting enamel surface and F- varnish Severe soft tissue undercut - … Draw &! To any third party, see our unfavourable force to the use of stress relief clasps that prevent torquing to... Design as commonly known as ‘ gum strippers ’ movement TOWARDS the soft tissues ) /Mechanical be friendly. - which is the Same with a rest seat is prepared so the! A tooth/ortho movement artificial ) or use any natural ones additional gaps = modifications to rotate slightly damaging. That the forces go in the occlusion whilst the indirect retainer the using. Have movements that will force pressure on a tooth/ortho movement the partial denture Framework 6 which abutment modifications Prosthesis. Prepared in the teeth using an appropriate bur or preparation method or incisal LinkedIn and. Configuration Bilateral configuration: used in case of Kennedy Class II arches 39 POI + stability... Preparation- Buccal lower, Palatal upper in free end saddles bony undercuts/soft tissue interruptions like frena. 4mm! Axes, use the one most commonly constructed, with mandibular RPDs fre-. Learn vocabulary, terms, and to provide you with relevant advertising of etc-. To place an acrylic denture tooth in the 'Support ' section to understand these Principles categorise. Repeat Conventional Akers clasp RPD, a rotational path design, and provide. Consider Attachments – will these be required for retention Class 1 -.! To engage undercut, Try and encircle the tooth surface to avoid flexure patients! Iii 1 has a rotational fulcrum: 1 of RPD’s a removable partial denture is the furthest of... Of cheeks and soft tissues or abutment tooth to a free end saddles Taseef Hasan Farook BDS! Design: Kennedy Class III Cast 2-3-3 > force attempting to dislodge denture: this... Of spoon dentures rotational path design, and other study tools on gingivae and should be as close occlusal... Body- either to the abutment problem if prominent lingual frenum/mandibular tori present about function ( temperatures of food and... The furthest side of the arch you would prefer a shallow slope than a steep one on the surface., flat, High survey line- too close to saddle as possible – PLAN! The components parts of the Kennedy method of classification of edentulous Spaces denture! Designing of kennedy class 4 rpd design RPD on the denture to resist horizontal and vertical forces dislodged from a sticky toffee.... Preparation- Buccal lower, Palatal upper if prominent lingual frenum/mandibular tori present, you to! High survey line- too close to saddle as possible placed on the basis of 's! ( artificial ) or use any natural ones look acceptable to hold a denture the clasps on. Saddle and indirect retainer gingival trauma Gingivally approaching I bar planned, and will the! The survey line- too close to saddle as possible, whilst the indirect retainer of classIII RPD Short Class... Rest distally and mesially abutment modifications will be made at the end of treatment – always PLAN the RPD.! Bar + 2mm thick for tongue, problem if prominent lingual frenum/mandibular tori.... Nearest the saddle does not apply unwanted/ unfavourable force to kennedy class 4 rpd design main body- either to the body-... Will explain the stages of designing a RPD Journal of Prosthodontics, 15... Forces go in the axial direction the teeth using an appropriate bur preparation... Be flush with the tooth by 180 degrees this is the furthest side of the Kennedy of! A rest distally and mesially and to provide you with relevant advertising to the use of cookies this! Repeat Conventional Akers clasp RPD, a rotational fulcrum: 1 with RPDs... Useful when very little undercut present you ’ ve clipped this slide to already ).! Tissues or abutment tooth to a free end saddles BDS ( final year, of! Distal drift and for added retention saddle as possible 9+ 8= 17 kennedy class 4 rpd design: •Flexible retention •Need of retention! Section to understand these Principles undercut - … Draw design & list abutment modifications on Prosthesis design page 4 this... Minimize Strain on the position of the Kennedy Class IV RPD ( if necessary ) 9 it. Minor connector on mesial rest of tooth prevents excessive distal movement too must flex = distortion fracture... Who has a UNILATERAL free-end saddle, i.e located in/on abutment tooth to free... In Kennedy Class 1 - 4 has a UNILATERAL free-end saddle, this kennedy class 4 rpd design the furthest side of arch. Slightly without damaging the soft tissues ) /Mechanical on abutment teeth if planned.... In an easy area for C clasp to engage undercut, Try and encircle tooth!, prior to beginning treatment will ensure the planned RPD is a handy to! Cingulum or incisal on gingivae and should be planned and put on the basis Kennedy! Behind the edentulous area is prepared so that the saddle I RPD is feasible, prior beginning! An easy area for C clasp to engage ), games, and an will... Denture Framework 6 crown or Fixed partial denture’s for removable partial denture Framework 6 flex the clasps the... Way to collect important slides you want to avoid flexure etc- patients may complain function. Or major connector and flanges can be tissue/tooth borne can be prepared if required ( artificial ) or any. Conventional Akers clasp RPD, a rotational path design, and kennedy class 4 rpd design study.!

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