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dental materials
athletic mouthguards
| Question | Answer |
|---|---|
| athletic mouthguards aka | mouth protectors, teeht protectors, mouth guard |
| athletic mouthguards use | protect dentition, tmj, and other oral tissues against blows to chin, top of head, face, mouth-absorb shock |
| types/classification of athletic mouthguards | stock, mouth formed, custom |
| stock | not recommended- poor fit, bulky, interfere w/ talking & breathing, difficult to retain |
| mouth formed | shell-liner or thermoplastic |
| mouth formed shell liner type | hard outer shell-polyviyl chloride: soft liner platicized acrylic gel or silicone rubber-set by chemical or thermal |
| mouth formed shell liner type disadvantages | exposure distorts shape and physical properties of these materials-NOT rec for athletes w/ ortho |
| mouth formed thermoplastic type | immerse in boiling water-then blanch in cold water-adapt w/ mouth-can be used w/ fixed ortho if fitted by a dentist |
| custom made protectors | thermoplastic material-polyvinyl acetate-polyethylene PVA PE |
| thermoplastic copolymer-polyvinyl acetate-polyethylene PVA | physical reaction of hardening on cooling=thermoplastic |
| properties PVA PE | thermal insulators, absorbs water, tensile strength, modulus and hardness decrease after water absorbs, but elongation, tear strength, and resilence increased |
| fluoride custom trays- | thinner than mouthguards-ideal for high prev of caries or risk: allows all surfaces to be covered w/ fluoride at once, farbicate in dental office in same method as mouthguards, |
| APF | 0.5% |
| NaF | 1.1% |
| Sn2F | 0.4% |
| ortho appliances | minor mvmt, correct overbites,overjets;spacing probls, slight malocclusions, one type is Hawley-combo of acrylic and metal wires |
| nightguards | bruxism, clenching, usually worn at night, alleviates wear on the dentition |
| space maintainers | temp replacement for primary teeth lost prematurely-prevents drifting and closure of space |
| Obstructive Sleep Apnea (OSA) | caused by reduced upper airway size and way the muscle acts, appliances advance mandible opening the airway |
| bleaching trays | similar to fluoride trays |
| materials used in oral appliance fabrication-most are thermoplastics | polycarbonates, polyethylene-(DH uses most)-polypropolene-polystyerences-polyvinyl chloride |
| maintenance of oral appliances | rinse b4 and after use w/ cold water, brush daily, store in rigid container, protect from heat and pressure during storage, eval routinely for deterioration-min life is usually 2 yrs-bite through, tearing, general dererioration from chewing it |
| using a vacuum mold heated to resin to the model (sta vac) is an emample of which thermoplastic or thermoset | thermoplastic |
| which type of mouth protector is fabricated by teh dental personnel | custom |
| which arch of the study model is used | maxilla |
| what type of resin was teh mouthguard material used in lab | PVA PE |
| why should the model vacuum plate and frames by sprayed w/ Sta-Lube: | so the material won't get stuck to the cast or the sta vac |
| where is the line drawn on the mouth guard to use as a guide for cutting-facial | 2-3 mm from the mucobuccal fold, starting at most posterior molars |
| where is the line drawn on the mouth guard to use as a guide for cutting-lingual | dividing alveoar arch and palate follow contours |
| storage and care | in a rigid container, rinse w/ cold water b4 and after use, brush w/ cold water once a day |
Created by:
jfgwinn
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