Maxillary and Mandibular Occlusal Rims Construction Steps

Step by Step Guide:

Caution: Wear lab coat, safety glass, gloves, mold mask.

Construction of Master Casts

1. Add water to Green Plaster bowl. Add buff stone powder into the bowl and mix the content with plaster spatula.

2. Spray the maxillary mold and mandibular mold with debubblizer and use the airgun to dry the molds. Setup a layer of newspaper. Start and adjust the setting of the vibrator machine. Add a small amount of the buff stone content with plaster spatula at one corner of each mold. Let the content flow around the mold. Make sure the content flows well in important anatomical landmarks such as Residual Ridge and Sulcus. Pour more buff stone content to fill the top of mold.
3. Let the molds sit for 25 minutes. Remove the master casts from molds and wait 45 minutes.
4. Use red color Sharpie marker to mark the non-working area and blue color Sharpie marker to mark working area.
 

Construction of Maxillary Record Base using Shellac Base Material

1. Use the Bunsen Burner to heat the Shellac Base. Place the Shellac Base of top of the Maxillary master cast. Continue to use the Bunsen Burner to heat the Shellac Base.
2. Use an eraser to expose the anatomical landmarks.
3. Use a pair of scissors to trim the nonworking area and frenum. Use an eraser and plaster knife to fold the sides of the shellac base.
 

Construction of Manidular Record Base using Triad Material

1. Open the Triad material package. Put the Pink Triad material on top of the Mandibular Master Cast. 
 
2. Apple Vaseline to Pink Triad material. Use sharp edge equipment such as plaster knife to trim the Pink Triad material.
 
3. Put the model in the light cure machine for 5 mins.
 

 Construction of Maxillary Occlusal Rim using Baseplate Wax

1. Use the flame from Bunsen Burner to heat the Baseplate Wax.
2. Fold the Baseplate Wax into a rectangular wax. Use your thumb and middle fingers to further help you fold the Baseplate Wax.
3. Apply sticky wax to Record Base.
4. Place the folded Baseplate Wax to the Record Base.
5. Use the Plaster knife to lop out the proper dimensions of the folded Baseplate Wax.
Note: The anterior height of the Occlusal Rims is 22mm. The posterior height of the Occlusal Rims is 18mm.
 

Construction of Manidular Occlusal Rim using Baseplate Wax

1. Use the flame from Bunsen Burner to heat the Baseplate Wax.
2. Fold the Baseplate Wax into a rectangular wax. Use your thumb and middle fingers to further help you fold the Baseplate Wax.
3. Apply sticky wax to Record Base.
4. Place the folded Baseplate Wax to the Record Base.
5. Use the Plaster knife to lop out the proper dimensions of the folded Baseplate Wax.
Note: The anterior height of the Occlusal Rims is 18mm. The posterior height of the Occlusal Rims is 18mm.
 
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About man c. chan

Man Chun Chan Mr. Chan began to study in New York City College of Technology in fall 2012. His desirable major is Restorative Dentistry. His current goals are to find the best Restorative Dentistry College in the country, learn from the top professors, learn about the latest dental laboratory technology, get top grades in school, work with fellow classmates, learn from upper-class men and upper-class women, and most importantly enjoy his classes. His future goals are to find the top employer who works diligent to serve the needs of dentist and patients. He is currently seeking employment. If you know someone who is seeking help, please email him at man.chan@mail.citytech.cuny.edu. Thank You.
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