Complete Dentures Flashcards
What is the main problem encountered when a complete denture is opposed to lower natural dentition?
The presence of natural teeth means that high force levels can be developed against the upper maxillary edentulous ridge- leads to trauma and instability of the denture
How does trauma to the maxillary denture bearing area present in a pt with a complete upper and lower natural dentition?
Ulceration and discomfort
Fibrous or flabby ridge
What causes fibrous/flabby ridge?
Alveolar resorption and fibrous tissue replacement
Happens after long period of abuse to soft tissues
How would you reduce trauma to the maxillary denture bearing area in a pt with a complete upper and natural dentition in the lower?
-maximise coverage of the denture bearing area by the prosthesis
-retaining a couple of roots for overdenture abutments gives an element of tooth bourne support and reduces ridge resorption
Name methods of ensuring stability in a complete maxillary denture
-optimum border seal
-effective post dam
-placing a bounded saddle in the mandible
-free end saddle in mandible to stop tipping
what is the purpose of placing a second post dam on an upper denture?
means that is the pt cannot tolerate the first one, you can bring it back
what is the ideal location of the post dam on an upper denture?
on the vibrating line between the hard and soft palate
what is the effect of absent lower posterior teeth on a complete upper denture?
all of the force from the bottom teeth is loaded on to the anterior and the posterior border seal of the maxillary breaks and the denture falls down
how does placing a bounded saddle in the mandible increase stability in a complete maxillary denture?
gives a more even occlusal plane
what problem does an increased overbite cause in a pt with lower anterior teeth and a complete upper denture?
how would you resolve this issue?
in function, the mandible moves forward and it displays and dislodges the denture
-reduce incisor edges of the natural teeth
- change the siting of the denture
what becomes difficult to control in a pt with a complete upper denture and natural lower teeth when there is an uneven occlusal plane?
how the arches slide over each other
why is eating such a challenge for patients with a complete upper denture and natural lower teeth?
as soon as the occlusion goes into lateral excursion, the occlusion is no longer centric/balanced and so uneven contacts on both sides
what are the options for the management of an irregular occlusal plane on the natural teeth (when making a complete denture for the opposing arch)?
- no adjustments
- minimal localised occlusal grinding
- radical occlusal adjustment
- extraction of teeth
-overlay appliances
give 2 treatment options for patients with complete lower dentures and upper natural teeth to relieve symptoms from trauma to the lower ridge
-using a soft lining (needs to be replaced regularly)
- implants and overlay denture
in complete dentures, do you get better retention with acrylic or cobalt chrome?
acrylic
