Paediatrics Flashcards
What are treatment options for discoloured teeth?
Microabrasion, bleaching, resin infiltration, local comp rest., veneers - direct and indirect, do nothing
what should be recorded in the pre-op sheet for discoloured teeth
clinical photos, sensibility testing, shade, diagram of defect, radiographs, patient assessment
what is micro abrasion
the removal of the surface layer of opaque enamel
what are some advantages of micro abrasion
removes brown/yellow stain, effective, conservative, inexpensive, can be used before bleaching, easily performed, permanent results
what are some disadvantages of micro abrasion
removal of enamel - destructive, senstivity, may get more staining
need protective wear for patient, dentist and nurse
HCl is caustic
results are unpredictable - may appear more yellow
must be done by dentist
what is the clinical technique for micro abrasion
protect soft tissues with dental dam
place sodium bicarbonate guard behind teeth
slurry of HCl for 5 seconds on tooth - can repeat 10 times but wash off and review colour and shape after each one
once happy - place fluoride varnish - clinpro is more white in colour
polish with sandpaper - the finer/smoother prisms look less stained
polish with toothpaste
how much enamel is lost with micro abrasion and compare this to enamel etching
100 microns are lost with micro abrasion - 10 are lost with etching so losing 10x the amount
when and why must micro abrasion be reviewed
review 4-6 weeks after, advise patient not to drink or eat highly coloured foods as teeth are dehydrated and will stain. Review as can offer a second cycle but only if some improvement has been seen with first lot, if not the second wont work either. Can only do 2 rounds. Must take pre and post op photographs
what bleaching techniques are available for a vital tooth
external bleaching only. Chairside power bleaching or at home night guard bleaching
what bleaching techniques are available for a non-vital tooth
internal bleaching - inside outside technique, walking bleach technique
why is chairside bleaching not normally recommended
it uses rapidly reactive, unstable hydrogen peroxide - damage to soft tissue and eyes - causes sensitvity and more expensive
what instructions are given to patients for night guard at home bleaching
brush teeth with toothpaste
place gel in mouth guard
put in over teeth and seat - remove excess from gums
rinse gently and dont swallow
wear over night or for at least 2 hours
brush teeth and rinse with cold water
sensitive toothpaste may be required
what are advantages of non-vital tooth bleaching
conservative, good results, gingival level of adolescents is unstable for fixed restoration so this is good in mean time, simple, no irritation to gingiva
what are important factors when deciding if a non-vital tooth is appropriate for internal bleaching
good root filling - to length and condensed, no pathology
anterior teeth without large restorations
not amalgam discolouration
not fluorosis or tetracycline discolouration
what is the clinical technique of walking bleach - non vital internal bleaching
access cavity, remove GP to ECJ, place bleaching agent on cotton wool ball and place in access, place dry cotton wool ball on top and then GI over this. 2 weeks later, remove GI and replace balls - can do this up 6-10 times. Regression of 50% at 2-6 years
what is the clinical technique of inside out bleaching
access cavity, custom mouthguard made. Patient puts bleaching agent in back of tooth and mouth guard. replaces the gel every 2 hours except through the night. wear guard all the time except when eating and cleaning. 10% carbamide peroxide used
what are potential complications with non vital bleaching
over bleaching, brittleness, external cervical resorption, failure to bleach, spilling of bleaching agents
how can external cervical resorption be prevented
layer of GI cement above GP cone - but can prevent adequate bleaching
non setting calcium hydroxide placed for 2 weeks before final restoration - neutralises any acidity in PL
what is resin infiltration
infiltration of enamel lesions with low-viscosity resin and cured. surface layer is eroded with etch, lesion becomes desicated and gives access - resin placed and can infiltrate through. causes lesions to lose discolouration and appear similar to sound enamel
what are the parts to caries risk assessment
clinical evidence, diet, plaque control, fluoride exposure, medical history, social history, saliva
what are the parts to preventions
fluoride varnish, fluoride toothpaste, fluoride supplement, fissure sealants, radiographs, diet advice, change medication, toothbrushing advice
what guidelines are used for caries risk and prevention
sign 138, SDCEP
what toothbrushing advice should be given
brush twice a day, including once before bed, fluoride toothpaste, spit dont rinse, should be supervised
what is the indication for fissure sealants
for all first permanent molars of all children regardless of risk factor
in high risk children - deciduous molars caries free, and premolars
what are the steps for fissure sealants
patient and tooth selection
tooth isolation - rubber dam, cotton wool
clean tooth - pumice and slurry
etch - 35% phosphoric acid and dry
apply resin sealant
light cure
check retention, remove flash, check for air bubbles
what materials are required for fissure sealants
rubber dam or cotton wool roll, dry guard, saliva ejector
35% etch
pumice and slow speed
resin
light cure
probe, excavator, microbrush, mirror
how can hard tissue defects be divided and give examples
localised - trauma or abscess of primary
generalised - environmental or hereditary
environmental - fluorosis or MIH
hereditary - ameleogenesis imperfecta
what is the difference hypomineralisation and hypoplastic
2 phases of enamel development - secretory and mineralisation
secretory lays down jelly like shape of tooth, if there is a problem with this - the tooth will be hypoplastic - insufficient bulk/thickness of enamel
mineralisation - increasing mineral content and thus hardness - if there is a problem with this, the tooth will be hypomineralised
what is AI and how is it diagnosed
AI is an inherited condition in which there is a malfunction with enamel development - either secretory or mineralisation. diagnosis - family history, appearance (affects all teeth, tooth size, colour, shape, yellow/brown or white), radiographic - no difference between enamel and dentine