Once you are done with the maxillary and mandibular occlusal rims. The following step is to articulate our models. The steps to do this are first mix the plaster to the right consistence. We locked our articulator so it cannot be moved while we are applying the plaster before it sets completely you start to smooth it out. After it sets we grind an X at the bottom part of our models. You are done articulating when you sure the model in centered.
Maxillary Teeth Anterior set up
To begin setting up maxillary teeth start with both right and left central teeth. Before setting up the central teeth you must identify the mid line. The best way to identify the midline is from the incisive papilla of the model. Once we’ve identified it we can draw a line straight down the occlusal rims. If the centrals are wrong the rest of the teeth will be placed incorrectly also. When placing the teeth we have to heat our instruments enough to soften the wax, making the removal of wax easier. Once we’ve taken off enough wax to fit the tooth the neck of the tooth distally to the mid line but keeping the tooth in a straight. The incisal edge of the tooth must touch the incisal plane insuring correct placement. Once the tooth is in its right position warm up a small amount of wax placing it above the neck of the tooth to keep it secure. When placing the lateral incisors use the incisial plane for guidance. The lateral incisor is a slightly shorter tooth from the centrals so the edges should not touch the incisal plane, it should be about 1mm above the incisal plane. Remove excess wax between each tooth if necessary. The canine is a little more challenging because it rests directly on the corner of the arch of the mouth. The incisal tip of the canine rest on the occlusal plane.
Maxillary Posterior set up follows the same method of removing the wax with the roach carver and placing the teeth in the correct order. When you place the four pre molars onto the wax make sure to constantly check with your occlusal plate to make sure they align they should be 1mm off the plate and that the lingual cups are the only ones touching the plate. The teeth should also have a straight axis. Next you cut out the wax again for the first and second molars you place the first molar in and make sure when you use the occlusal plate that the lingual cusps are the only ones touching it. This tooth’s axis should be on a slight tilt because the teeth have the curve of spee. Lastly you take place the second molar into the space you cut out of the wax. The tooth might not fit in you will need to take a hand tool and trim down the tooth a bit.