Question 237 · LDEK · Complete dentures
Describe the procedures when determining the occlusal plane in the case of establishing central occlusion in edentulous patients:
1) technically, the orientation of the occlusal plane is registered on the lower occlusion rim, and then it is transferred to the upper occlusion rim;
2) the position of the occlusal plane is registered on the upper occlusion rim, and then the lower occlusion rim is being adjusted;
3) the position of the occlusal plane is related to the auxiliary lines such as Spee, Monson, Camper;
4) after checking the occlusion rims in the oral cavity, the convexity of the upper occlusion rim at the lip-buccal curvature should be corrected;
5) in the anterior region, the upper occlusion rim curvature should support the lip, be visible about 1.5-2.0 mm at slight mouth opening (when lips are at rest) and should be parallel to the inter-pupillary line;
6) in the anterior region, the occlusion rim should be slightly underneath the lip and parallel to the infraorbital line;
7) in the posterior region, the occlusal rim should be corrected parallel to the Camper’s ala-tragal line;
8) in the posterior region, the occlusal rims should be corrected parallel to the Frankfort plane.
The correct answer is:
2) the position of the occlusal plane is registered on the upper occlusion rim, and then the lower occlusion rim is being adjusted;
3) the position of the occlusal plane is related to the auxiliary lines such as Spee, Monson, Camper;
4) after checking the occlusion rims in the oral cavity, the convexity of the upper occlusion rim at the lip-buccal curvature should be corrected;
5) in the anterior region, the upper occlusion rim curvature should support the lip, be visible about 1.5-2.0 mm at slight mouth opening (when lips are at rest) and should be parallel to the inter-pupillary line;
6) in the anterior region, the occlusion rim should be slightly underneath the lip and parallel to the infraorbital line;
7) in the posterior region, the occlusal rim should be corrected parallel to the Camper’s ala-tragal line;
8) in the posterior region, the occlusal rims should be corrected parallel to the Frankfort plane.
The correct answer is:
- A. 1,3,4,6,7.
- B. 2,4,5,8.
- C. 1,3,4,5,8.
- D. 2,4,5,7.
- E. 2,3,4,6,8.
Hint
The upper rim sets the plane and lip support and the lower rim follows; choose the true facial references for the anterior and posterior segments.
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