RPD Manual 11 - Removable Prosthodontics - Dalhousie University

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Guiding planes are most effective when they: Surveying, Path of Insertion, Guiding Planes - 19 When the retentive arm (•) contacts the tooth first, it can cause movement of the tooth since the tooth is not stabilized to resist displacement. When the rigid bracing or reciprocal arm contacts first, it braces the tooth so the retentive arm cannot displace it. a. are parallel b. include more than one common axial surface (e.g. proximal and lingual surfaces) c. are directly opposed by another guiding plane (e.g. facing guiding planes in a modification space) d. are placed on several teeth e. cover a large surface area (long and/or broad) These guiding planes are parallel, include more than one common axial surface (i.e. distal of premolar, mesial of molar), directly oppose one another and are fairly long. They will be very effective. When marked with a carbon marker, well-prepared guiding planes appear as wide survey lines:
Surveying, Path of Insertion, Guiding Planes - 20 Selection and Preparation of Guiding Planes: a. A path of insertion is selected. b. The number and position of guiding planes is selected. c. With the diagnostic cast as a guide, parallel surfaces are prepared intraorally with straight cylindrical burs (#<strong>11</strong>56 or #557L or equivalent cylindrical bur). The surveyed cast should be nearby for comparison, so that the bur can be placed in the same relationship to the tooth as the analyzing rod makes with the diagnostic cast. The bur should be placed at the same angulation as the surveying rod. The triangular space below the height of contour should appear to be the same. d. Guiding planes should be at least 1/2 to 1/3 of the axial height of the tooth (generally a minimum of 2 mm in height). Use a light sweeping stroke continuing past the bucco- and the linguo proximal line angles. Reduction should follow the bucco-lingual curvature of the tooth, rather than slicing straight across the tooth. Guide planes for distal-extension cases should be slightly shorter to avoid torquing of the abutment teeth. Lingual guiding planes for bracing or reciprocal arms should be 2-4 mm and ideally be located in the middle third of the crown, occluso-gingivally. Use a good finger rest to establish parallel planes. e. If tooth surfaces selected for guiding planes are already parallel to the path of insertion, little if any tooth modification may be necessary. f. The prepared surfaces are polished rubber wheels or points. g. Guiding planes are the first features prepared intraorally. If occlusal rest seats are prepared initially, placement of a proximal guiding plane will remove some of the rest seat preparation, and result in a narrowed rest with a sharp occluso-proximal angle.
Page 1 and 2: Removable Partial Denture Manual Ro
Page 3 and 4: Table of Contents Table of Contents
Page 5 and 6: Table of Contents -iii Principles o
Page 7 and 8: Table of Contents - 2 4. poor progn
Page 9 and 10: Table of Contents - 4 F. Classifica
Page 11 and 12: Anatomy Tour - 6 Anatomy Tour for C
Page 13 and 14: Anatomy Tour - 8 ! Soft Palate ! Vi
Page 15 and 16: Anatomy Tour - 10 OTHER STRUCTURES:
Page 17 and 18: Preliminary Impressions - 12 6. Wra
Page 19 and 20: Surveying, Path of Insertion, Guidi
Page 23: Surveying, Path of Insertion, Guidi
Page 29 and 30: Rests and Rest Seats - 24 A. Defini
Page 31 and 32: Rests and Rest Seats - 26 (d) The f
Page 33 and 34: Rests and Rest Seats - 28 Correct P
Page 35 and 36: Rests and Rest Seats - 30 2. The in
Page 37 and 38: Major Connectors - 32 Definition Ma
Page 39 and 40: Major Connectors - 34 3. Position -
Page 41 and 42: Major Connectors - 36 B. Full Palat
Page 43 and 44: Minor Connectors - 38 Definition Mi
Page 45 and 46: Minor Connectors - 40 The junction
Page 47 and 48: Minor Connectors - 42 When the dent
Page 49 and 50: Direct and Indirect Retainers - 44
Page 65 and 66: Denture Bases - 60 Advantages: Bead
Page 67 and 68: Denture Bases - 62 of the natural d
Page 69 and 70: Principles of Partial Denture Desig
Page 75 and 76:
Principles of Partial Denture Desig
Page 77 and 78:
Design Session - 72 Classification
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Page 83 and 84:
Page 85 and 86:
Clinical Protocol, Final Impression
Page 87 and 88:
Clinical Protocol, Final Impression
Page 89 and 90:
Framework Adjustment - 84 Removable
Page 91 and 92:
Framework Adjustment - 86 3. Silico
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Framework Adjustment - 88 after adj
Page 95 and 96:
Jaw Relations, Altered Cast Techniq
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Jaw Relations, Altered Cast Techniq
Page 99 and 100:
Interim Removable Partial Dentures
Page 101 and 102:
Coordinating Fixed and Removable Pr
Page 103 and 104:
RPD Checklist - 98 7. Abutment Modi
Page 105 and 106:
RPD Checklist - 100 16. Baseplate a
Page 107 and 108:
Summary of Design Principles for Re
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RPD Manual 11 - Removable Prosthodontics - Dalhousie University

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