Orthognathic ridge relationship (class II) presents several problems which should be taken into consideration when constructing complete denture prosthesis.
These include all EXCEPT:- a- Require minimum interocclusal distance.***
- b- Have a great range of jaw movement.
- c- Require careful occlusion, usually cuspless teeth are indicated.
The correct answer is b- Have a great range of jaw movement.
Class II orthognathic ridge relationships are characterized by a decreased interarch distance, which is the distance between the upper and lower alveolar ridges. This reduced distance limits the range of jaw movement, making it difficult to achieve a stable and functional occlusion with complete dentures.
The other options are all correct:
a- Require minimum interocclusal distance:
Due to the reduced interarch distance, class II orthognathic ridge relationships require a minimum interocclusal distance to accommodate the denture material and ensure adequate clearance between the dentures and the soft tissues.
c- Require careful occlusion, usually cuspless teeth are indicated:
Cuspless teeth, also known as non-anatomic teeth, have a smooth, rounded surface without cusps or ridges. They are often used in complete dentures for patients with class II orthognathic ridge relationships because they reduce the risk of interference with the opposing teeth and improve stability.
