Rem Pros Flashcards
What is removable prosthodontics?
It is a speciality in dentistry which focuses on replacing mssing teeth with removable prosthesis.
Gum and teeth will be replaced.
What are some of the common consequences of tooth loss?
- Bone resorption - can lead to high frenum/muscle attachment
- Overreruption of opposing tooth
- Medially/distally drifting/tilting of adjacent tooth/teeth
- Occlusal disharmony affecting function
- Change in speech and aesthetic
- General affects on general health as well as quality of lfie
What are some of the way we can classified removable dentures?
- Based on location of missing teeth - partial vs comlete
- Based on materials - acrylic, valplast, crhome
- Based on support - tissue or tooth or combined
- Construction methods - immediate vs conventional
Do all patients with missing teeth need dentures?
No
What are the aims of a removable dentures?
Restore:
- Aesthetics
- Function
- Speech
- Preserving remaining soft and hard tissues
What are indications for a removable dentures?
- Replacing single or multiple missing teeth
- Temporary space maintenance in congenital missing teeth
- Obturation of hard palate after removal or oral cancer
What are contraindications for partial dentures?
- Lack of suitable abutmnet teeth
- Rampant caries
- Severe periodontal diseases
- Poor oral hygiene
- Patients who cannot tolerate dentures
- Patient who recently received head and neck radiation treatment
What are the options for patient that have missing teeth? Be very general?
- Removable prosthodontics
- Implants
- Fixed prosthodontics
- Do nothing
What should we consider before making a denture for a patient?
- Patient oral hygiene
- Existing oral health conditions: caries, perio, pathologies, salivary flow and quality
- GIngivae and abutment tooth/teeth
- Gagging issues patient might have
- Patient’s perception
What codes are there for dentures?
- Codes starting with 7
- Denture reline
- Denture repair
How many appointments do you need for a general denture?
- Denture consult + primary impressions
- Secondary impressions
- Bite registration + shade mould selection
- Denture try on
- Denture insert
- Review denture
What will the patient feel when they get a new denture?
- Excessive saliva
- Change in speech
- Feeling of bulkiness
- Food might get stuck under denture
- Denture moves to some extend
- Remove denture to clean
- Might have a sore spot or ulcer
- Might have a high spot
How do they care for their denture?
- Remove dentures and clean after meals
- Brush dentures as brushing your teeth
- Brush and remove dentures at night and keep in denture container
What is the difference between an overlay and overdenture?
Overlay - the denture sits around the tooth
Overdenture - the chrome part of the denture sits on top of teeth
What are the standard steps for a chrome denture construction?
- Denture consult + primary impressions
- Secondary impressions
- Frame try in + bite registration + shade mould selection
- Trial denture - aka wax
- Denture insert
- Review denture
What are the standard appointments for a valplast denture contruction?
- Consult, alginate impressions, bite reg, shade selection adn mould
- Dentur try in
- Denture insert
- Review
What do you do in the consultation appoitmnet?
- Take all histories
- Do a specialised limited exam - extra oral exam, intraoral exam, occlucal exam
- Take alginate impressions
What is the purpose of alginate impression?
To make a study cast and fabrication of a special trays - preforated (for secondary alginate) vs non perforated (for rubber based material)
What do you write in a lab prescription after completing primary impression with alginate?
- Please pour up alginate impressions for study models
- Please construct a CCA special tray for upper or lower arch
What is an occlusal stop?
It stops the tray from touching the teeth. Similarly - the gingival stopper will stop at the gingival thus making your impression better
What materials could you use for secondary impressions?
- PVS
- PE
- Alginate
What to do if the patient has no teeth and you still need a bite registration?
Record centric relation
What are the indications for temporary denture? How many appointment does a construction require?
As an interim denture or immediate partial denture
Usually 3 appointments:
- Denture consult, alginate impression + shade selection
- denture try in
- Denture insert (after extractions)
+
Review
(Can’t be chrome or varplast)
What is edentulism?
It is the state of being edentulous, without natural teeth
What is edentulous?
It means “without teeth”. It could be partial or complete
What are some of the reasons for tooth loss?
- Decay and periodontal disease
- Trauma
- Orthodontic extractions
- Congenital missing teeth
- Impacted teeth
- Pathologies
- Radiation therapy to treat head and neck cancers
What are the Kennedy’s classifications of partial edentulous arch?
Class I - bilaterla edentulous areas located posterior to the remaining natural teeth
Class II - A unilateral edentulous area located posterior to the remaning natural teeth
Class III - A unilateral edentulous area with natural teeth remaining both anterior and posteror
Class IV - A single, bilaterla edentulous crossing mid line
What are the 3 main categories of changes following tooth loss?
- Morphological changes - extra and intra oral changes
- Neuromuscular changes
- Functional changes
What are some of the extra oral changes that occur due to tooth loss?
- FLat philtrum and deep nasolabial grooves
- Hollow cheeks
- Decreased columella-philtrum angle
- Narrowing of the lips
- Decrease face height
- Commissures drop
- Lost support for facial muscle
- Reduced facial height
What are some of the intra-oral changes that occur due to tooth loss?
- High frenal attachment due to bone loss
- Bone resorption
- Traumatised neuromascular structure under denture
- Atrophic mucosa - can cause pain due to proximity of the denture to the nerves
- Class III skeleton relationship will develop eventually
- Decrease in occlusal vertical dimension
What are some of the occlucal changes that occurs due to tooth loss?
- Occlusal disturbances
- Lost of occlusal vertical dimension
- Increase in parafunctional habits
What are psychological changes following tooth loss?
- Emotional effects of tooth loss
- May increase stress levels
- Social-disability
What are the impacts of tooth loss on oral health and general health?
- Reduce in quality of life
Oral otcomes:
- Risk factor for impaired mastication
- oral mucosa lesions
General health:
- Unhealthy diet due to impaired mastication
- Sleep disordered breathing
What are current and future treatment options for edentulism?
- Prevention of edentulism - MAIN STRATEGY - think about biopsychosocial approach
- Monitor alveolar ridge resorption
- Monitor oral mucosa health and screening oral mucosa lesions
- Rem. Pros.
- Consider implant retained overdenture or implat supported overdenture where appropriate
What is complete denture retention?
Complete denture retention is the resistance to displacement of the denture base away from the ridge. It provides psychologic comfort to the patient.
What is denture stability?
Stability is the resistance to horizontal and rotational forces. Stability has been cited as the most significant property in providing for physiologic comfort.
What is denture support?
Support is the resistance to vertical movement of the denture base towards the ridge.
What are some of the important aspect of the denture that promote retention?
- Proper contour and design of polish surface - harmonising with function of tongue, lips and cheeks
- Contour and thickness
- Smoothness
What are some of the aspect that de-promote denture retention?
- Overextension of denture base
- Overcontour of polished surface
What is the neutral zone?
It is a virtual potential denture space with a dynamic equilibrium forces of the tongue, cheeks and lips.
If denture seats in a neutral zone - denture is more retentive.
What are some of the physical factors affecting retention?
- Adhesion
- Cohesion
- Surface tension created at the meniscus of the denture border
- Gravity ( think better for lower and worse for upper)
- Atmospheric pressure
How to maximise denture retention by managing physical factors?
Good primary and secondary impressions - good accuracy, tissue contact and adequate periphery seal - remember special tray needs to have near perfect coverage and cover all hard tissues such as the tuberosities
What are some of the biological factors affecting retention?
- Height of bone ridge
- Shape and width of bone
- Muscle attachment
- Neuromuscular control - muscle movement diseases such as Huntington’s disease may cause some problems