rpd lab project

8/12/2019 RPD Lab Project

1/22

Removable Partial Denture

RT 453S 2004Laboratory Project


2/22

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


3/22

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


4/22

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


5/22

Removable Partial Denture

RT 453S 2004Laboratory Project 1:

Record Bases / Wax Rims


6/22

Project 1:

Record Bases & Wax Rim

Clinical Implications:

To evaluate and record the proper VDOand CR position when the remaining

dentition is not adequate enough to

support the bite registration material


7/22

Need the record base

and wax rim for the jaw

record.

Interocclusal Record

Adequate tooth number

vs.

Inadequate tooth number

to support the bite registration materials


8/22

Model #1

Model #3*


9/22

Use your eyes to estimate the correct

path of insertion. Then use small amount

of wax to block out the undercut.


10/22

Why?

To obtain a stable and

retentive recordbase and

yet avoid the damage

on the cast

Minimum

Wax Block Out

Where?Teeth: marginal gingiva,

proximal surfaces, and

embrasures

Soft tissue: gross undercut


11/22

Apply the separatingmedium

Wait for the first coat air dry, then apply

the second coat.


12/22

Mix acrylic resin in a paper cup to

a thick creamy consistency

Lightly vaseline your fingers.

Mold the acrylic resin into the arc

shape wafer.

Adapt the acrylic resin wafer onto

the cast with even pressure.

2-3 mm thickness is desired.

Press the excess against the edge

of the cast to trim it off.


13/22

Round, smooth,

and polish the

record base

Before adding thewax rim, roughen

the acrylic surface

for mechanical

retention


14/22

Record base extension: 2-3 mm short of vestibule


15/22

Record base extension: 2-3 mm short of vestibule

R

e

Record base extension next to

the teeth:

Avoid the extend toward to

the tooth


16/22

Record base:

2-3 mm thick

Do not overextend


17/22


18/22

Keep the space for the

bite registration material


19/22

Bite registration materials:

ZOE bite registration paste

Wax

Compound

Silicone


20/22

Selectively adding

the wire clasps can

improve the

retention & stability

of the record basefor accurate jaw

record


21/22

Record base & wax

rim

StableGood support

Rigid

Comfort

Accurate

interocclusalrecord


22/22

Cast #2

Cast #3**

Mount the #3

mandibular castat the best contact

position by next Friday

rpd lab project

Documents