Modeling Technique Flashcards
The process of constructing a solid three dimensional from by many additions of a pliable material such as restorative wax.
- The feature from a mass is impractical
Modeling
The linear form of the head or features.
Silhouette
Turn the model and the construction until a line is visible.
Use of the solhouette to accurately model surface form.
- First learn the concepts of modeling as taught.
- As we progress each of us uses our own technique.
- A thorough knowledge of stuctural relationships and the norm of each feature will help us to recognize any variation and recreate it.
- Only when we have developed our own technique can we safely “borrow” from others.
Development of technique
Any support or framework employed in a restorative treatment.
Armature
- Splints
- Wire
- Certain sutures
- Cotton saturated with:
- Plaster of paris
- Liquid sealer
- Cardboard
- Pliable metal plates
Types of Armatures
Never begin modeling without adequate preparation first.
- Analyze the situation
- Anticipate problems
- Determine a plan of operation
Analyzation Before Modeling
When modeling, you determine this and stay within their limits.
- Involves three dimensions.
Size
- Length
- Width
- Projection (most difficult)
Dimensions of Size
Correct spatial relationship of features.
Position
- Bone structure
- Facial proportions (also determines size)
Useful in determining position
The external shape
Form
- Knowledge of structural relationships
- Object analyzation
- Manual coordination
Achievement of Form
- Exact measurements of length and width must be marked on the wax surfaces.
- Long shallow lines are marked with a spatula.
- These lines can be erased by rubbing a finger over them when the modeling is completed.
Landmarks of Size
Whenever 2 or more measurements are made in the same direction, be sure they are made from the same point.
Measurements in one direction
- The model should be to the side or above the modeling.
- Close one eye and model by sighting at arms length.
- Profile viewing requires the parallel location of the model.
- Refer to the model many times.
- View the model and waxwork from the same point.
Position of The Model
- Visualize the feature as a geometric form.
- Parts of the feature may resemble a form.
Configuration to a pattern.
- Ear - Wedge
- Glabella- Triangle
Visualize the feature as a geometric form
- Outer rim of the ear - ? (question mark)
- Closed eye- Almond
- Line of closure of the lips- Hunting bow
Parts of a feature may resemble a form
Modeling speed will stay the same, the difference is:
- Fewer mistakes are made as we learn.
- Correction of errors is time consuming.
Progression
The greatest amount of work is done with these.
The hands
These are required for inexcesssible areas.
Instruments
Use one of these at a time, supporting with the other when necessary.
Hand
Try to work at this distance.
Arms length
This can result from being heavy handed.
Distortion of the features
- Construct each feature in its rough form.
- Do the smoothing at one time- when the feature has its form.
Rough Modeling
Correctly build the mass, then worry about small details, depressions, concave areas (Example: nares)
Construction of large masses
- By additions
- By reductions
- May people prefer to just “start over”
- You can slowly reduce the model- trim away the wax while maintaining the form.
Surface Corrections
To observe the surface as a linear form.
Modeling by silhouette
Example: Nose- get the correct profile first, then proceed.
Modeling first by profile.
Importance: The form is seen when viewing the deceased.
Modeling the bilateral form second.
- It is nearly impossible when the body is on the table.
- Inverted position- reveals unnoticed details.
Modeling from Direct View
- Keeps the eyes from becoming fatigued.
- Modeling will be accurate.
- Distance viewing is helpful.
- Move the table to change light direction and create shadows.
Frequency of Changed Viewing
- These are very important
- Will reduce eye fatigue.
- When returning to the work area study your subject from a distance.
Rest Periods
