Articulators-CHOI-2022-FINAL PDF

7/31/22 FUNCTIONS OF ARTICULATORS ARTICULATORS & FACEBOW Ø Reproduce mandibular movements Ø Analyze existing occlusion and restorative space Ø Establish & assess vertical dimension of occlusion Ø Design new occlusal scheme Mijin Choi, DDS, MS, MBA, FACP 1 2 DETERMINANTS OF MANDIBULAR MOVEMENT...

7/31/22 FUNCTIONS OF ARTICULATORS ARTICULATORS & FACEBOW Ø Reproduce mandibular movements Ø Analyze existing occlusion and restorative space Ø Establish & assess vertical dimension of occlusion Ø Design new occlusal scheme Mijin Choi, DDS, MS, MBA, FACP 1 2 DETERMINANTS OF MANDIBULAR MOVEMENTS DETERMINANTS OF MANDIBULAR MOVEMENTS CONDYLAR GUIDANCE (Posterior Determinant): Ø Relationship between condylar head within articular fossa and articular eminence Hobo, Shillingburg et al JPD 1976 3 4 DETERMINANTS OF MANDIBULAR MOVEMENTS ANTERIOR GUIDANCE (Anterior Determinant): Ø Produced by relationship between maxillary and mandibular anterior teeth Ø Degree of horizontal & vertical overlaps Setting of condylar guidance (degree of steepness) using PROTRUSIVE RECORDS CO: Centric occlusion MI: Maximum intercusspation 5 6 1 7/31/22 DETERMINANTS OF MANDIBULAR MOVEMENTS INCISOR GUIDE TABLES (IGT): Ø Allows for setting of anterior teeth relationship (Degree of steepness between anterior teeth) Custom IGT 7 Mechanical IGT 8 INCISAL GUIDE TABLES - PANADENT 9 10 OTHER FACTORS INFULUENCING MANDIBULAR MOVEMENTS Distance between maxillary anterior teeth and condylar hinge axes 11 12 2 7/31/22 OTHER FACTORS INFULUENCING MANDIBULAR MOVEMENTS The cusp paths traveled on the articulator are distal to those in the mouth in this condition Distance between right and left condyles Hobo, Shillingburg et al JPD 1976 Distance between maxillary anaterior teeth 13 14 OTHER FACTORS INFULUENCING MANDIBULAR MOVEMENTS Vertical position of maxilla Weinberg, JPD, 1061 The cusp paths traveled on the articulator are distal to those in the mouth in this condition Hobo, Shillingburg et al JPD 1976 15 16 FACEBOW What will allow for accurate positioning of maxillary and mandibular casts that represents patient’s anatomy? Facebow registration 17 18 3 7/31/22 https://youtu.be/CLlxT3wM4mU 19 20 CADIAX 21 3D ELECTRONIC REGISTRATION SYSTEM 22 NON-ADJUSTABLE TYPES OF ARTICULATORS SEMI-ADJUSTABLE FULLY-ADJUSTABLE 23 24 4 7/31/22 SEMI-ADJUSTABLE NONADJUSTABLE Ø Accepts facebow Ø Fixed (110 mm) or partially adjustable intercondylar distance Ø Horizontal & lateral condylar paths Ø Anterior guide table Ø Static holding device Ø Fixed condylar path Ø May accept Facebow and/or CR records 25 26 SEMI-ADJUSTABLE – PANADENT ARTICULATORS Model: PCH SEMI-ADJUSTABLE Model: PSH Non-Arcon 27 28 Non-Arcon Arcon Arcon 29 Arcon Non-Arcon 30 5 7/31/22 CONDYLAR INCLINATION ADJUSTMENTS - As low as 25°, Each line increases by 4° 31 32 HORIOZONTAL CONDYLAR INCLINATION VARIATIONS 33 LATERAL CONDYLAR INCLINATION Ø Immediate side shift Ø Progressive side shift Ø Bennet angle 34 LATERAL CONDYLAR INCLINATION ADJUSTMENTS ARTICULATOR SELECTION Ø Curvilinear protrusive and mediotrusive pathways Ø 0.5, 1.0, 1.5, 2.0, 2.5mm Ø 6~7 degrees progressive angulation (=Bennett’s angle) 35 36 6 7/31/22 MUTIPLE RESTORATIONS FOR BUILDING OCCLUSAL SCHEME SINGLE UNIT RESTORATIONS !"#$%"&"'()$*+,(&-$. Nonadjustable Hinge type Avg 20 degree !/01.%&#2,(34*/'2&"( Articulator with a fixed condylar path +1$/&*3, Semi-adjustable !/01.%&#2,(2&%,"&2(+1$/&*3,( 56,**,%%(&*+2,7(8997(:99; !/01.%&#2,($*3$.&2(+1$/&*3, !33,<%.(=&3,#4>(%"&*.=," 37 38 Thank You 39 7