Special Complete Dentures
Special Complete Dentures Definitions
Tooth-supported over denture:
“A dental prosthesis that replaces the lost or missing natural dentition & associated structures of the maxilla &/or mandible & receives partial support & stability from one or more modified natural teeth”
Special Complete Dentures Important Notes
Disadvantages of immediate dentures:
- The fit, appearance or comfort is difficult to predict
- There is no try in
- Often require tissue conditioner during the healing phase
- Need a definite reline
Advantages of immediate dentures:
- Patient’s appearance is maintained
- Circumboreal support, muscle tone, the vertical dimension of occlusion, jaw relationship and face height can be maintained
- The tongue will not spread due to the loss of teeth
- Less post-operative pain
- Easier to duplicate the natural tooth shape and position
- The patient is likely to adapt more easily to dentures
The treatment procedure for an immediate denture:
- The posterior teeth are extracted and allowed to heal
- Impression and cast are made
- Anterior teeth on the master cast are broken away and trimmed up to the cervical margin and smoothened.
- The ridge lap (cervical) portion of the artificial teeth are trimmed and arranged on the master cast.
- Artificial teeth are arranged over the area where the teeth are to be extracted.
- The teeth arrangement should be in harmony with the existing teeth as well as the prosthetic teeth.
- The denture is flashed, dew-axed, packed, processed, and finished.
- During the insertion appointment, the remaining anterior teeth are extracted as a traumatically as possible, preserving the soft tissue and bone.
- The finished denture is seated in the patient’s mouth.
Overdentures:
Advantages of Over dentures:
- Maintains the integrity of the residual ridge
- Improves stability and support
- Improved proprioception
If the abutment fails, the over denture can be used as a conventional denture
Types of over dentures:
- Conventional immediate denture
- Interim or transitional immediate denture
Special Complete Dentures Long Essays
Question. 1. Define immediate complete denture. Write in detail steps in making it.
Answer:
Definition of immediate complete denture:
“A complete or removable partial denture constructed for insertion immediately following the removal of natural teeth”
Steps of immediate complete denture:
- Making of alginate impression
- Duplicating it
- Pouring of the cast(master cast) for one of the impression
- It is used for preparing baseplate, rims, jaw relation & teeth arrangement
- In other impressions pour molten wax into the teeth to be extracted
- After it cools pour the duplicating cast
- It is used for processing of dentures
- Fabricate baseplate & occlusal rims over master cast Record jaw relation
- Teeth arrangement done over it Try in verification is done
- Shift the denture to refractory cast Processing of the denture is carried out
- Atraumatic extraction of the tooth to be done
- Insertion of an immediate denture
Read And Learn More: Prosthodontics Question And Answers
Special Complete Dentures Short Essays
Question 1. Single complete dentures.
Answer:
Types of Single complete dentures:
- Maxillary complete denture opposing a mandibular natural denture
- Maxillary complete denture opposing a mandibular partial denture
- Mandibular complete denture opposing a maxillary natural denture
- Mandibular complete denture opposing a maxillary partial denture
Indications of Single complete dentures:
- Inpatient with a jaw discrepancy
- In cleft patients
- Retrognathia mandible
Disadvantages of Single complete dentures:
- Malposed, unerupted teeth interfere with balanced occlusion
- The presence of lower anterior causes difficulty in aesthetics Acrylic opposing natural teeth causes abrasion of acrylic
- Porcelain opposing natural teeth causes abrasion of natural teeth
Complications of Single complete dentures:
- Combination syndrome
- Wear of natural teeth
- Fracture of the
Question 2. Problems in single denture construction.
Answer:
- Malposed, tipped, or supra-erupted teeth in the lower arch will interfere with balanced occlusion
- It produces soreness, mucosal changes, and ridge resorption in the maxilla
- Maxillary denture tends to get displaced
- As lower anterior are present in a fixed position, it is difficult to obtain aesthetic teeth arrangement
- The use of acrylic teeth opposing natural teeth will produce abrasion of acrylic teeth
- Use of porcelain teeth opposing natural teeth will produce abrasion of natural teeth
1. Problems in maxillary complete denture opposing mandibular partial denture:
- Combination syndrome:
- The patient tends to concentrate the occlusal load on the remaining natural teeth
- Results in more force acting on anterior portion of the maxillary denture
- Increased resorption of the anterior part of the maxilla
- Labial flange will displace and irritate labial vestibule
- Posteriorly there will be fibrous overgrowth in maxillary tuberosity
- Wear of natural teeth:
- Porcelain teeth lead to severe abrasion of opposing natural teeth
- Denture fracture
- It occurs due to
- Excessive anterior occlusal load
- Deep labial frenal notches
- High occlusal load
2. Mandibular single denture:
- It causes severe ridge resorption of edentulous mandible because of
- Constant movement of the tongue
- Less denture-bearing area
Question 3. Requirements of overdenture.
Answer:
Requirements of overdenture:
- Abutment teeth should be surrounded by healthy periodontium
- Maximum reduction of the coronal portion of tooth Endodontic treatment is required
- Internal attachment should not be present while tooth preparation
- Fluoride application
- Grossly destroyed tooth sleeve coping retainers
- Attachments for additional retention
- The motivation of the patient to maintain oral hygiene
- Recall appointments
- Regular fluoride application
Patient Selection:
- Young patient
- Favourable psychological effect
Abutment Selection:
- Periodontally sound
- Cuspids & bicuspids are frequently selected
- Free of caries
- Sufficient width of attached gingiva
- Ideal crown root ratio
Question 4. Tooth-supported complete denture.
Or
Disadvantages of overdentures
Or
Indications & contraindications of over dentures
Answer:
Definition of Tooth-supported complete denture:
“A dental prosthesis that replaces the lost or missing natural dentition & associated structures of the maxilla & or mandible & receives partial support & stability from one or more modified natural teeth”
Advantages of Tooth-supported complete denture:
- Maintenance of the integrity of the ridge
- Improves stability & retention of denture Improves proprioception
- Avoid psychological effects on patient
- Universal accepted
- Can be relined
Disadvantages of Tooth-supported complete denture:
- Oral hygiene maintenance is required Periodical fluoride application
- Frequent recall visits are required
- Expensive
- Not used in cases with
- Reduced inter arch space
- Bony undercuts
- Periodontal breakdown of the remaining teeth
- Loss of remaining teeth
Indications of Tooth-supported complete denture:
- Aesthetics
- Cleft palate
- Maxillofacial trauma
- Worn-out denture Congenital anomalies
- Abnormal jaw size & position
Contraindications of Tooth-supported complete denture:
- Poor periodontal status Carious tooth Old age
- Improper crown root ratio
- Anterior teeth due to the resorbed alveolar ridge
- Gingival recession
- Pupal calcification
Special Complete Dentures Short Question And Answers
Question 1. Advantages of an immediate denture.
Answer:
Question 2. Advantages of over dentures
Answer:
- Maintains the integrity of the residual ridge
- Improves retention and stability of the denture
- Improves proprioception
- Helps in regulating biting force over the denture
- Has a psychological effect on the patient
- Can be used universally
- Even if there is abutment failure, the abutment can be extracted and the over-denture can be relined
Question 3. Types of bar-retained over dentures
Answer:
Types of bar-retained over dentures:
- This implant treatment involves the placement of 3-4 im- plants and the attachment of a customized bar.
- This bar provides rigid support through and series of clips to the denture that fits over the top of the bar.
- The bar retained overdenture treatment can be used in both the upper and lower jaws.
- It allows the denture to be removed from the mouth for cleaning.
- Patients also have to brush the bar which remains attached to the implants in the mouth.
- In the upper arch the bar over the denture often allows for a “horse-shoe design” to be adopted thereby eliminating the denture covering the palate.
- After the implants have been integrated and the customized bar is fabricated and screw-retained to the lower implants, this bar cannot be removed by the patient and needs to be brushed and cleaned daily just as teeth.
- The bar provides the retention for the denture which will fit over the top of the bar.
Question 4. The disadvantage of an immediate denture.
Answer:
Disadvantage of an immediate denture
- Time-consuming
- Expensive
- Difficult to record centric relation & occlusion
- Try in not possible
- Difficulty in speech & mastication
- Difficult to adapt to new dentures
Special Complete Dentures Viva Voce
- The canine is best over denture abutment
- Periodontal disease is the most common cause of loss of abutment in over denture
- Regular follow-up examination of over denture is needed at intervals of 3–6 months
- 24 hours are necessary to wear immediate denture just after extraction
- After 7 days of extraction, an immediate denture can be removed during the night.