2024 Flashcards
What 2 intra-oral radiographs would you want to take for a patient who is in pain in teeth 45 and 46?
Right bite wings
Lower right periapicals
What are you looking to assess from the radiograph of a patient presenting with pain on tooth 46 and 45?
- periapical pathology
- Caries
- Fractures in teeth
- overhanging or defective restoration margins
What other tests to do?
- sensibility testing
- percussion (TTP)
- tooth slooth test
What are the radiographic signs of cracked tooth syndrome?
- periapical pathology secondary to crack
- PDL widening
- radiolucencies within the tooth suggesting a crack
What are the treatment options for cracked tooth syndrome?
- do nothing
- Extract (if the crack is subgingival and tooth not restorable)
- If restorable and extends to pulp = RCT + crown
- If does not extend to pulp = restore and review
What to consider for the long term prognosis of the tooth?
- Site of fracture and extent
- Remaining tooth structure
- tooth vitality (pulpal involvement)
3 things about acrylic that makes it good for a denture?
- easy to repair
- high hardness and high fatigue strength
- cost effective
What property of acrylic makes it more prone to fracture on impact?
Brittleness as it has low impact resistance
What are 3 common fracture features if an acrylic denture dropped?
- midline fracture
- tooth detaches from denture base
- loss of flange
features of CoCr denture fracture?
Acrylic detaches from CoCr plate
Clasp fractures or bends
Other than impact or acrylic properties why would it break?
Parafunctional habits
Occlusion such as deep overbite
Problems with bonding between tooth and acrylic base
Denture processing problems
Woud you need to take an impression of the current denture?
no
denture breakes from midline twice again what else would you do to enhance the palate?
- Enhance to palate with metal mesh or fibre
If the denture breaks again after rebasing or religning what would you include in the new design?
- Cocr Palatal coverage with acrylic post dam
- Acrylic crosslinking of denture teeth
- Cocr Backing of teeth
Other than erosion, abrasion and attrition, give 4 other intra-oral signs of wear?
- polished restorations
- sensitivity
- Cracks or fractures in enamel
- abfraction
- Flattened occlusal surfaces
If 21 is discoloured and non vital, what is the best treatment option?
Internal bleaching using the walking bleach technique
What is the least invasive rehabilitation technique for localised anterior wear?
DAHL technique
Why does the DAHL technique makes posterior support better?
- gain space for anterior build ups
- no need for occlusal reduction
- posteriors erupt into place and gain support leading to more balanced distribution of occlusal forces
What 6 clinical records would you need for tooth-wear rehabilitation?
- Sensibility testing
- Radiographs
- Articulated study models
- Diagnostic wax ups
- Occlusion - RVD, OVD, freeway space
- Facebow registration
- Clinical photos
What things about non-y2 amalgam that makes it better than normal amalgam?
- high corrosion resistance
- higher compressive strength
- less creep
- higher early strength
How is non-y2 amalgam made?
by mixing silver copper particles with silver tin lathe cut particles to produce high copper y-2 free amalgam
What are the aims of the minimata convention?
- Promote mercury free alternatives
- Phase down dental amalgam use
- Raise awareness about the risks of mercury
- Monitor mercury exposure and provide health advice
What are the decisions made by the minimata convention?
- designate a special waste stream for mercury
- phase down the use of dental amalgam
- control measures on mercury emissions to air water and land
- restrict amalgam use to its encapsulated form
- educate dental professionals and dental student on using other amalgam free alternatives
What other investigations would you need for a vertical bone loss on 46 ( PA , MPBS and BPE is given)
6PPC
OPT