Single Complete Dentures

Maxillary Single DenturesMore commonTeeth usually lost before their mandibular antagonists

Mandibular Single DenturesAvoid when possibleSevere ridge resorption due to forceStress reduction should be used Processed resilient denture linerOverdentureImplant retained denture

Single DenturesMore difficultGreater force causes: Displacement Fracture due to flexure Severe residual ridge resorption

Single DenturesMore difficultTooth malpositions decrease stability (extrusion, tipping, rotation) Difficulty balancing

Single Complete DentureOcclusal adjustment of natural teethReduce severe curve of Spee level supraeruptionsRecontour rotated teeth to permit contacts on flat surfaces

Single Complete DenturesReduce cusps in shaded area, to level plane of occlusionMock adjustment can be performed on a diagnostic cast Severe Curve of SpeeSupereruption

Avoid Single Denture Against Anterior Teeth AloneResorptionLooseningFractureCombination Syndrome

Avoid Single Denture Against Anterior Teeth AloneFabricate a RPD for Stress DistributionMake CD & RPD at the same timeEnsures optimal occlusion

Occlusion RimsUse to establish OVD, NOT Incisal DisplayOverbite will be incorporated when anterior teeth are set, lengthening incisal edges

Occlusion RimsFlat Surface for Opposing TeethNo inclinesIf steps in occlusal plane, provide flat areas for opposing natural teeth

Maxillo-Mandibular RelationsOcclusion Rims on RPD framework Opposes CD RimsCentric and eccentric records with AlluwaxOptimizes occlusion

Maxillo-Mandibular RelationsCrowns or bridges should be waxed up against the CD tooth setupOptimizes occlusionEnsures, changes can be made

Maxillo - Mandibular RelationsCentric RegistrationCUD usually stableExtraoral hand position if opposing natural dentition (less obtrusive)

Setting Anterior TeethMore difficultSetting for esthetics may produce excessive overbite with natural teeth Decreases stabilityCompromised position, used to balance need for esthetics & function

Posterior Denture Teeth Requires more adjustment to obtain stable centric contactsDenture teeth will not normally articulate well with natural dentitionPinpoint contacts/inclines, etc.

Tip:Increase incisal pin 1mmSet posterior teethLet wax hardenReturn pin to original position Adjust occlusion until pin touches table

Cast Metal Denture BaseUse if denture fractures repeatedlyUsual causes: Heavy forces from natural teeth Occlusal contacts on inclines Impingement on a bony midline flexing of the denture

Denture Teeth WearMore rapid against natural teethMore frequent recallsAdjust occlusion to prevent changes in stress distribution

Denture Teeth Wear More RapidlyNever use porcelain denture teeth Severe attrition of natural teethPrefer denture teeth to wear