Removable Partial Denture RT 453S 2004

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Removable Partial Denture RT 453S 2004

• Laboratory Project

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Summer Quarter RPD (RT453s)Lab Project Models

• Model 1 non-mounted maxillary cast x1
• Model 2 mounted mandibular cast x1
• Model 3 non-mounted mandibular cast x2
• Model 4 mounted maxillary fixed technique
  cast x1
• Model 5 non-mounted mandibular
• fixed technique cast x1

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Schedule 7/9 Project 1 record base/wax
rim model 1 3 7/16, 23 Project 2 cast
equilibration/RPD design model 2 3 /
tooth preparation 7/30, 8/6 Project 3 natural
teeth set up/ RPD design / tooth
preparation natural teeth 8/13, 20 Project 4
fixed technique in combination case /
tooth preparation/ crown wax up model 4
5 8/27 Surveying practical exam All projects
due today with bench instructors
signatures 9/3 Final Exam
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Introduction of Bench Instructors

• Group A Dr. T.L. Chang/Dr. Pamela Margliano
• Group B Dr. Sunderpal Dail
• Group C Dr. Evelyn Chung
• Group D Dr. Ronald Koslowski
• Group E Dr. Joseph Lim/Dr. Samantha King
• Group F Dr. James Stevens/Dr. Melody Balobalo
• Group G Dr. Takahiro Ogawa/Dr. James Kelly

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Removable Partial Denture RT 453S 2004

• Laboratory Project 1
• Record Bases / Wax Rims

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Project 1 Record Bases Wax Rim

• Clinical Implications
• To evaluate and record the proper VDO and CR
  position when the remaining dentition is not
  adequate enough to support the bite registration
  material

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Interocclusal Record Adequate tooth number
vs. Inadequate tooth number to support the bite
registration materials
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Model 1
Model 3
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Use your eyes to estimate the correct path of
insertion. Then use small amount of wax to block
out the undercut.
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Minimum Wax Block Out Where? Teeth marginal
gingiva, proximal surfaces, and embrasures Soft
tissue gross undercut
Why? To obtain a stable and retentive record base
and yet avoid the damage on the cast
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Apply the separating medium
Wait for the first coat air dry, then apply the
second coat.
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Round, smooth, and polish the record base
Before adding the wax rim, roughen the acrylic
surface for mechanical retention
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Record base extension 2-3 mm short of vestibule
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Record base extension 2-3 mm short of vestibule
Record base extension next to the teeth Avoid
the extend toward to the tooth
Re
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Record base 2-3 mm thick Do not overextend
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Extend the record base onto the proximal,
palatal/lingual surfaces of the teeth to
enhance the retention, stability, and support of
the record base
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Keep the space for the bite registration material
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Bite registration materials ZOE bite
registration paste Wax Compound Silicone
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Selectively adding the wire clasps can improve
the retention stability of the record base for
accurate jaw record
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• Record base wax rim
• Stable
• Good support
• Rigid
• Comfort

Accurate interocclusal record
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Cast 2
Cast 3
Mount the 3 mandibular cast at the best contact
position by next Friday