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Properties of gypsum
Strength and resistance
Compatability with impression materials
Ease of use
Working or initial setting time
Length of time from the start of the mix until it reaches a semi-hard stage
Time allowed for manipulation
Final Setting Time
The length of time from the beginning of the mix until the mass has become ridgid
Techniques for pouring study models
single pour with wax base
single pour with base former
Pour the positive replication of the oral cavity
Pour a base of gypsum and bind the two together
Maxillary cast trimming
Parallel to the central grooves of posterior teeth
Canine eminence to midline
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