Basic principles of Removable Partial Denture Design Dr. Emad Hanbali Outline Outline the edentulous areas to be restored : - The classification - The primary abutments - The guiding planes - The anterior posterior tilt Unmodified Class III Unmodified Class III GP 1 Primary abutments GP 2 Unmodified Class III AP tilt Support Dual Uniform GP 1 Primary supporting elements GP 2 The Introduction of : One rest = pivot Two rests = fulcrum Basic principle of design : Cross-arch stabilization : A) Indirect retention B) Indirect support GP 1 Imaginar y fulcrum line GP 2 GP 1 X X Perpendicular bisector of fulcrum line to mark the most suitable sight for setting of indirect retention rests and indirect GP 2 GP 1 X GP 2 X Short span : triangular configuration GP 1 X X Long span: trapezoidal configuration GP 2 Connectors: A) B) Major Connector Minor Connector Mesh Minor connector Mid palatal strap major connector 6-8 mm AP Palatal strap Ridged design Hygienic design Retention : Direct retainers Clasp assembly : 1. Minor connector 2. Rest 3. Retentive arm 4. Reciprocal arm O : Outline S : Support C : Connector A:& R : Retention OSCAR E N J O Y
© Copyright 2024