Ch 18/ Oral Appliances
both are true
T/F Atheletic mouthguards may prevent a concussion. However they must be worn correctly and consistently
false
T/F Dental professionals fabricate stock mouthguards. Custom-made mouthguards can be purchased at most athletic and drug stores
false/ they are custom made
T/F Fluoride custom trays are not custom made and can be bought in the stores
first is true, second is false
T/F Patients may clean oral appliances with a soft-bristled, wet toothbrush. No commercial products are available in which to soak oral appliances
true
T/F with acrylic and bis-acryl (TRIAD) appliances, there is no methyl methacrylate monomer odor or hazard involved
thermoplastic
_________ implies that a polymer softens on heating and then hardens into the final shape upon cooling
plaster
___________ is recommended for the model of an oral appliance
polyethylene
____________ is used for the majority of oral appliances that may be made by the dental hygienist
nightguards
_____________ are prescribed for patients with bruxism
thermoplastic
a desirable property for an oral appliance because the final shape can be individualized for each case by using a study model
space maintainer
a temporary appliance that is used when primary teeth have been lost prematurely
-custom trays -provisional bridges -denture relines and repairs -retainers and nightguards
acrylic and bis-acryl materials are used for: (4)
20-30 sec
after the material has been heated and slumped, lower the frame onto the model and run the suction for _________
be physiologically compatible with the wearer
athletic mouth guards should be properly fitted,stay in place comfortably, be made of resilient material approved by the U.S. Food and Drug Administration and:
thermoset polymers
both acrylic and bis-acryl (TRIAD) are considered to be _______________
vacuum former
construction of many oral appliances utilize a ______________ to heat (soften the sheet material) and then mold the material onto a cast
polystyrenes
custom impression trays and denture bases are made of __________ thermoplastics
adult patient undergoing head or neck radiation therapy
fluoride custom trays are recommended for which of the following patients? A. elderly patient with severe periodontal disease B. three year old patient with early childhood caries C. Adult patient undergoing head or neck radiation therapy D. adolescent patient with severe halitosis
mouth formed guard
guard that is referred to as a "boil and bite" style, it can become distorted and does not accommodate an individual athletes unique oral features
fluoride custom trays
ideal for patients who have a high prevalence of dental caries or high caries risk
thermoset
material that is resistant to change when heated
thermoset
materials that are molded and then polymerized in the final shape
thermoplastics
most of the plastics that are used in the fabrication of simple oral appliances are ___________
custom made, stock, boil and bite
mouth protectors can be:
polyethylene
mouthguards, tooth positioners, nightguards, space maintainers, fluoride custom trays, and stints are all made of ___________ thermoplastics
alleviate tooth surface wear
nightguards are worn to ______________
change in periodontal health
patients wearing an oral appliance during sleep have not demonstrated:
2-3 min
preheat the vacuum former for _______ after the model has been poured and trimmed
polyvinvyl chloride
splints, dual laminates, temporary removable partial denture(flipper), and ortho retainers are made of ___________ thermoplastics
polyropylene
temporary crown and bridge molds are made of ___________ thermoplastics
polycarbondates
temporary crowns and bridges and orthodontic retainers are made of _____________ thermoplatics
light activated polymerization
the TRIAD system from Dentsply International uses _______________ resulting in a faster curing time
-remove palatal area from model -trim around the central frenum and lateral frena
the appropriate technique for finishing a athletic mouth guard is to:
trim material along gingival margin
the appropriate technique for finishing a bleaching tray is to:
trim material along gingival margin
the appropriate technique for finishing a fluoride custom tray is to:
nightguard
the function of __________ is to absorb the forces of clenching, which alleviates wear on the dentition
remineralization
the process of restoring mineral ions to the tooth structure
space maintainer
the purpose of this appliance is to prevent the adjacent teeth from drifting and closing the space before the eruption of the succeeding teeth
-the airway is enlarged -collapsibility is reduced
the purpose of wearing an oral appliance for OSA is to modify the position of upper airway structures so that: (2)
soften, re-harden
thermoplastic materials will _________ on heating and __________ on cooling
obstructive sleep apnea (OSA)
thought to be caused by a reduced upper airway size and altered upper airway muscle activity
-stock mouthguard -mouth formed guard -custom made mouthguard
three types of athletic mouthguards:
crown and bridge scissors for thinner acrylic bur for thicker
trim the appliance by using ____________ for thinner materials and ___________ for thicker
-acidulated phosphate fluoride (0.5%) -sodium fluoride (1.1%) -stannous fluoride (0.4%)
types of fluoride gels that can be placed in custom made trays: (3)
-high incidence or risk of dental caries (rampant enamel or root caries) -xerostomia -overdentures -hypersensitivity -radiation therapy
use of fluoride custom trays is indicated for patients with: (5)
thin=.25-.5 inchs thicker= .5-1 inch
when fabricating an oral appliance with a vacuum former, let the material heat and sag ________ for thin materials and ___________ for thicker material
gingival contours of the teeth
when fabricating an oral appliance, which of the following oral anatomical structures should be necessarily replicated?
vertical
when making an oral appliance, the model height must be ____________ to maintain occlusal characteristics
drill a hold in the palatal or lingual area
when using a suction type of vacuum former, ______________ to allow suction into these vacuum pockets
