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Simplified distal extension impression technique/ oral surgery courses  

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Simplified distal extension impression technique/ oral surgery courses  

  1. 1. Simplified DistalSimplified Distal Extension ImpressionExtension Impression TechniqueTechnique INDIAN DENTAL ACADEMYINDIAN DENTAL ACADEMY Leader in continuing Dental EducationLeader in continuing Dental Education www.indiandentalacademy.comwww.indiandentalacademy.com
  2. 2. IntroductionIntroduction www.indiandentalacademy.comwww.indiandentalacademy.com
  3. 3. contentscontents  Introduction.Introduction.  Review of distal extension partial dentureReview of distal extension partial denture impression techniques.impression techniques. – Mclean’s techniqueMclean’s technique – hindel’s techniquehindel’s technique – Modified hindel’s techniqueModified hindel’s technique – Functional reline techniqueFunctional reline technique – Fluid wax techniqueFluid wax technique – Selective pressure techniqueSelective pressure technique – Altered cast techniqueAltered cast technique www.indiandentalacademy.comwww.indiandentalacademy.com
  4. 4.  Simplified distal extension impressionSimplified distal extension impression techniquetechnique  AdvantagesAdvantages  RequirementsRequirements  ProcedureProcedure  ConclusionConclusion  ReferencesReferences www.indiandentalacademy.comwww.indiandentalacademy.com
  5. 5. Review of Distal Extension PartialReview of Distal Extension Partial Denture TechniquesDenture Techniques  1.Mclean’s Technique1.Mclean’s Technique This technique records tissues of ridges inThis technique records tissues of ridges in Functional form and then relating it toFunctional form and then relating it to remainderremainder of arch by a second impression.of arch by a second impression. Disadvantage:Disadvantage: Finger pressure on alginate stock trayFinger pressure on alginate stock tray cannot produce same loading as bitingcannot produce same loading as biting force.force. Procedure:Procedure: www.indiandentalacademy.comwww.indiandentalacademy.com
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  7. 7.  2.Hindel’s Technique2.Hindel’s Technique First,impression of ridge is made with ZnOEFirst,impression of ridge is made with ZnOE then special trays (with holes) for secondthen special trays (with holes) for second impression to apply finger pressure throughimpression to apply finger pressure through thethe holes of tray to underlying impression of ridge.holes of tray to underlying impression of ridge. Advantage:Advantage: Tissue recorded under load.Tissue recorded under load. Disadvantage:Disadvantage: Tray position can be altered andTray position can be altered and subsequently premature contactssubsequently premature contacts.. Procedure:Procedure: www.indiandentalacademy.comwww.indiandentalacademy.com
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  9. 9.  3.Modification of Hindel’s technique3.Modification of Hindel’s technique Here, only one tray is used instead of two.Here, only one tray is used instead of two. DisadvantagesDisadvantages:: 1.Time consuming.1.Time consuming. 2.Injection of alginate may not record the2.Injection of alginate may not record the teeth portionteeth portion Procedure:Procedure: www.indiandentalacademy.comwww.indiandentalacademy.com
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  12. 12.  4.Functional Reline Technique.4.Functional Reline Technique. Functional Impression is made after theFunctional Impression is made after the partial denture is fabricated.partial denture is fabricated. Advantage:Advantage: Soft tissue displacement can be madeSoft tissue displacement can be made controlled by controlling the amount of reliefcontrolled by controlling the amount of relief provided.provided. Disadvantages:Disadvantages: 1.Failure to maintain correct relationship1.Failure to maintain correct relationship between framework and abutment teeth.between framework and abutment teeth. 2.Change in vertical dimension.2.Change in vertical dimension. www.indiandentalacademy.comwww.indiandentalacademy.com
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  14. 14.  5.Fluid wax technique5.Fluid wax technique Disadvantage:Disadvantage: 1.Time consuming.1.Time consuming. 2.Impression with increased tissue2.Impression with increased tissue distortion.distortion. Procedure: first a custom tray is made, itsProcedure: first a custom tray is made, its peripheral extensions are corrected, then borderperipheral extensions are corrected, then border moulding is performed and tray is relieved formoulding is performed and tray is relieved for impression materialimpression material www.indiandentalacademy.comwww.indiandentalacademy.com
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  16. 16.  6.Selected pressure technique6.Selected pressure technique Objective:Objective: Disadvantage:Disadvantage: Difficult to demarcate the tissues likeDifficult to demarcate the tissues like stress and non-stress bearing areas.stress and non-stress bearing areas. Procedure:Procedure: www.indiandentalacademy.comwww.indiandentalacademy.com
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  18. 18.  7.Altered cast technique7.Altered cast technique In this, fluid wax technique impression ofIn this, fluid wax technique impression of displaced ridge is made by a tray attached todisplaced ridge is made by a tray attached to denture framework and master cast is altereddenture framework and master cast is altered to accommodate new ridge impression henceto accommodate new ridge impression hence so called altered cast technique.so called altered cast technique. Disadvantages:Disadvantages: 1.More number of steps involved.1.More number of steps involved. 2.Difficult procedure.2.Difficult procedure. Procedure:Procedure: www.indiandentalacademy.comwww.indiandentalacademy.com
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  21. 21. Simplified Distal ExtensionSimplified Distal Extension Impression TechniqueImpression Technique  Advantages:Advantages: 1.Convenient.1.Convenient. 2.Less time consuming2.Less time consuming.. 3.Simple.3.Simple.  Requirements:Requirements: Special tray on diagnostic model.Special tray on diagnostic model. Tray adhesive.Tray adhesive. Putty silicone impression material.Putty silicone impression material. medium body silicone impression material.medium body silicone impression material. www.indiandentalacademy.comwww.indiandentalacademy.com
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  24. 24. ReferencesReferences 1.Glen P.Mcginey,Alan B.Carr1.Glen P.Mcginey,Alan B.Carr McCraken’s Removal Partial Denture Prosthodontics 10 edi.McCraken’s Removal Partial Denture Prosthodontics 10 edi. 2.McCraken’ WL2.McCraken’ WL A comparision of tooth-borne and tissue borne removable partial dentures.A comparision of tooth-borne and tissue borne removable partial dentures. JPD 1953,vol 3,pg 375-381.JPD 1953,vol 3,pg 375-381. 3.Hindels GW3.Hindels GW Stress analysis in distal extension partial dentures.Stress analysis in distal extension partial dentures. JPD 1957,vol7,pg197-205JPD 1957,vol7,pg197-205 4.Kramer HM4.Kramer HM Impression techniques for removable partial denturesImpression techniques for removable partial dentures JPD 1961 vol11,pg84JPD 1961 vol11,pg84 5.Wilson JH5.Wilson JH Partial dentures relining the saddle supported by the mucosa and alveolarPartial dentures relining the saddle supported by the mucosa and alveolar bonebone JPD1953,vol3,pg807-813JPD1953,vol3,pg807-813 www.indiandentalacademy.comwww.indiandentalacademy.com
  25. 25. 6.Fitzloff RA6.Fitzloff RA Functional impressions with thermoplastic materials for reline procedures.Functional impressions with thermoplastic materials for reline procedures. JPD1984,vol52,pg25-27JPD1984,vol52,pg25-27 7.Devan MM7.Devan MM Basic principles of impression makingBasic principles of impression making JPD1952,vol2,pg26-35JPD1952,vol2,pg26-35 8.Applegate OC8.Applegate OC Essentials of removable partial denture prosthesis,2 edi.,1960Essentials of removable partial denture prosthesis,2 edi.,1960 9.leupoldRJ9.leupoldRJ An altered cast procedure to improve support for removable partial denturesAn altered cast procedure to improve support for removable partial dentures JPD1965,vol15,pg672-678JPD1965,vol15,pg672-678 10.Rapauno J10.Rapauno J a single tray dual impression technique for distal extension partial denturesa single tray dual impression technique for distal extension partial dentures JPD1970,vol24,pg41-46JPD1970,vol24,pg41-46 www.indiandentalacademy.comwww.indiandentalacademy.com

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