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