Complete Dentures Short Question and Answers

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 Complete Dentures Short Answers

Question 1. Parts of complete denture
Answer:

  1. Denture base: The part of a denture that rests on the foundation tissues and to which teeth are attached
  2. Denture flange: The part of a denture base that extends from the cervical ends of the teeth to the denture border
  3. Denture borders: The margin of the denture base at the junction of the polished surface and impression surface
  4. Denture teeth: They function to improve esthetics, phonetics, and mastication

Question 2. Steps in the fabrication of complete denture
Answer:

  • Diagnosis and treatment planning
  • Making diagnostic casts
  • Mouth preparation
  • Primary impression
  • Primary cast
  • Fabrication of custom trays
  • Secondary impression
  • Master cast
  • Fabrication of occlusal rims
  • Recording jaw relations
  • Articulation
  • Arrangement of artificial teeth
  • Try in
  • Processing of denture
  • Insertion
  • Post-insertion review and maintenance

Question 3. Effects of aging.
Answer:

  • Young people have lighter teeth due to translucent enamel
  • Old people have dark & opaque teeth due to secondary dentin formationShiny teeth in old people
  • Teeth with a brownish tinge in older people Certain diseases are limited to certain ages
  • Thus age can be used to rule out certain systemic conditions
  • Age also determines the prognosis.

Question 4. Metal dentures.
Answer:

Indications of Metal dentures:

  • Tooth supported dentures
  • Reduced interocclusal space
  • High occlusal forces
  • Acrylic allergy

Advantages of Metal dentures:

  • Improved retention & stability
  • Improved thermal conductivity
  • Comfortable for patients
  • Easy to maintain

Read And Learn More: Prosthodontics Question And Answers

Disadvantages of Metal dentures:

  • Difficult to reline
  • Trimming is difficult
  • Difficult to correct underextensions
  • Fewer aesthetics

Question 5. Gagging
Answer:

The gag reflex is a normal, healthy defense mechanism to prevent foreign bodies from entering the trachea

Causes of Gagging:

  • Over-extended denture borders
  • Unstable occlusal conditions
  • Systemic conditions
  • Alcoholism, smoking

Features of Gagging:

  • Causes displacement of denture
  • Triggered by tactile stimulation of the soft palate, posterior part of the tongue & fauces

Site of Gagging:

  • Posterior part of the maxillary denture
  • Distolingual part of mandibular denture

Introduction To Complete Dentures Paltal Over Extension Of A Maxillary Denture And Distolingual Over Extension Of A Mandibular

Gagging Treatment:

  • Correction of overextended dentures
  • Correction of occlusal vertical dimensions and occlusal prematurities

Question 6. Angular cheilitis.
Answer:

Etiology:

  • It occurs at the angle of the mouth among persons having deep commissural folds secondary to the overclosure of the mouth
  • It can occur among persons with lip-licking habits, denture-wearing, or deficiency of riboflavin, vitamin B12, and folic acid

Angular cheilitis Clinical Features:

  • The infection starts due to the colonization of fungi in the skin folds following the deposition of saliva due to re-peated lip-licking
  • Patients often have soreness, erythema, and fissuring at the corner of the mouth
  • In some cases, it may extend over the adjacent skin sur- faces

Angular cheilitis Treatment:

  • Lip balm
  • Topical antiseptics
  • Topical antifungal cream
  • Topical steroid ointment
  • Nutritional supplements

Question 7. Kelly’s combination syndrome.
Answer:

It was identified by Kelly in 1972 in patients wearing a maxillary complete denture opposing a mandibular distal extension prosthesis

Pathogenesis:

  • It occurs in a sequential manner
  • The patient tends to concentrate the occlusal load on  remaining natural teeth
  • Results in more force acting on the anterior portion of the maxillary denture
  • Increased resorption of the anterior part of the maxilla
  • The labial flange will displace and irritate labial vestibule • Posteriorly there will be fibrous overgrowth in maxillary tuberosity
  • The shift of occlusal plane posteriorly downwards pro- duces resorption in the mandibular distal extension denture-bearing area
  • Mandible shifts anteriorly during occlusion
  • There is
    • Decrease in vertical dimension at occlusion
    • Decrease in retention and stability of a denture
    • Disocclusion of lower anterior
    • Reduced periodontal support of anterior teeth

Question 8. Infection control
Answer:

Methods:

  • Immunization:
    • Vaccination for Hepatitis B for all dental personnel
  • Personal barrier:
    • Hand washing before gloving & after degloving
    • Gloves Protect against contamination
    • Changed between patients & for the same patient is torn or worn out
      • Face mask:
        1. Protects from inhalation of aerosols
        2. Prevents spatter from patient’s mouth
        3. Prevents droplets from contaminated solution
        4. Protective clothing
        5. Gown with long sleeves, high neck & long knee length
      • Eyewear:
        1. Prevention of bacterial/viral contact
  • Surgical asepsis:
    • Preparation of surgical site
    • Draping the patient
    • Isolation
  • Surface asepsis:
    • Sterilization of instruments
    • Use of disposable instruments
  • Disposal of waste: Methods
    • Incineration
    • Burial in a landfill
    • |Sterilization

Question 9. Hypermobile ridge tissue.
Answer:

Hypermobile ridge tissue Cause:

  • Due to excessive residual ridge resorption Management:
  • Small tissues which do not interfere with tissue functioning:
    • Left untreated: Impression is made using the mucositis technique
    • Large tissues: removed surgically

Question 10. Polished surface.
Answer:

  • It is defined as that portion of a surface of a denture that extends in an occlusal direction from the border of the denture and includes the palatal surfaces
  • It is the part of the denture base which is usually polished and it includes the buccal and lingual surfaces of the teeth
  • It refers to the external surfaces of the lingual, buccal, and labial flanges and the external palatal surface of the denture
  • It should be well polished and smooth to avoid the collection of food debris
  • It should be harmonious with the oral structures
  • They should not interfere with the action of oral mus- culture

Question 11. Denture irritation hyperplasia.
Answer:

The hyperplastic reaction of mucosa over the borders of the denture

Denture irritation hyperplasia Cause:

  • Trauma due to unstable dentures

Denture irritation hyperplasia Features:

  • Deep ulceration
  • Fissuring
  • Inflammation

Denture irritation hyperplasia Management:

  • Surgical excision
  • Correction of dentures

Question 12. Xerostomia.
Answer:

It refers to a subjective sensation of a dry mouth, but not always, associated with salivary hypofunction

Etiology:

  1. Developmental:
    1. Salivary gland aplasia
  2. Water/metabolic loss:
    • Impaired fluid intake
    • Hemorrhage
    • Vomiting/diarrhea
  3. Latrogenic:
    • Medications:
      • Antihistamines: Diphenhydramine
      • Decongestants: Pseudoephedrine
      • Antidepressants: Amitriptyline
      • Antipsychotic: Haloperidol
      • Antihypertensive: Methyldopa, CCB
      • Anticholinergic: Atropine
  4. Radiation therapy of head & neck:
    1. Both stimulated & unstimulated salivary flow decreases with increasing radiotherapy.
    2. Systemic Diseases:
      • Sjogren’s syndrome
      • Diabetes mellitus
      • Diabetes insipidus
      • HIV infections
      • Psychological disorders.
      • Graft-versus-host disease
  5. Local factors:
    • Decreased mastication.
    • Smoking
    • Mouth breathing

Question 13. Functions of saliva.
Answer: 

Introduction To Complete Dentures Function Of Saliva

Question 14. Combination syndrome.
Answer:

It was identified by Kelly in 1972 in patients wearing a maxillary complete denture opposing a mandibular distal extension prosthesis

Pathogenesis:

  • It occurs in a sequential manner
  • The patient tends to concentrate the occlusal load on re- remaining natural teeth Results in more force acting on the anterior portion of the maxillary denture
  • Increased resorption of the anterior part of the maxilla
  • The labial flange will displace and irritate the labial vestibule Posteriorly there will be fibrous overgrowth in the maxillary tuberosity
  • The shift of occlusal plane posteriorly downwards pro- duces resorption in the mandibular distal extension denture-bearing area
  • Mandible shifts anteriorly during occlusion
  • There is
  • Decrease in vertical dimension at occlusion
  • Decrease in retention and stability of the denture
  • Disocclusion of lower anterior
  • Reduced periodontal support of anterior teeth

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