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Occlusion > Lecture 4_May 9 lecture > Flashcards

Lecture 4_May 9 lecture Flashcards

1
Q

tooth to tooth wear

A

attrition

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2
Q

What is RMMA?

A

some muscle hyperactivity may represent an increase in the static tonic contraction of the muscle (RMMA)!!!

Tonic contraction. Doesn’t have to have bruxism??? This makes your muscle sore!?

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3
Q

most common type of bruxism?

A

awake bruxism- tied to emotional stress

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4
Q

most destructive type of bruxism

A

nocturnal

mainly grinding and could include clenching

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5
Q

Does peripheral or CNS have a dominant role in sleep bruxism?

A

CNS and/or autonomaic vs. peripheral sensory factors

now classified as sleep related movement disorder

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6
Q

3 phases of bruxism?

A
  • phasic or eccentric- grinding of teeth during sleep (55%). Cricket sound. and where you see wear facets.
  • TOnic = constatnly clench teeth with no eccentric movements. 11%

Mixed= combo of both 36%

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7
Q

Etiology of bruxism?

A

disturbance in the cranio neuromuscular causing function hyperactivity

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8
Q

What is the bruxism quad?

A

muscles, TMJ, teeth, and sleep

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9
Q

Prevalence of TMD?

A

40-60%

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10
Q

If you see pitting, does this mean erosion?

A

not always

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11
Q

What often cause enamel craze lines?

A

chewing ice!

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12
Q

where do you often see wear with patients that have sleep problems?

A

they wear towards the anterior teeth due to posterior interferences

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13
Q

How many minutes do teach actually touch per day?

A

26 mins per day

with bruxism- much longer

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14
Q

How long does it take to stabilize TMD when you give an occlusal splint?

A

approximately 4 months

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15
Q

what should you use instead of abfraction?

A

corrosion, stress, and friction

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16
Q

percentage of OSAS in adults?

A

2% increasing to 24% by age 65

17
Q

most common type of bruxism?

A

awake bruxism

18
Q

80% of the sleep period is made of REM or Non REM sleep?

A

non REM which is important for the PHYSICAL rest

19
Q

REM is most important for ____ rest?

A

psychic

20
Q

was wave sleep is associated with muscle hyper function?

A

delta wave

AKA arousal activity

21
Q

T/F SLEEP bruxism Suggests that the central and/or autonomic nervous systems, rather than peripheral sensory factors, have a dominant role

A

TRUE!

NOT PERIPHERAL

22
Q

what are the 3 types of sleep bruxism?

A

phasic, tonic or centric, mixed

23
Q

what is the most common type of sleep bruxism?

A

phasic or eccentric at 52%. this is the cricket sounding one!

24
Q

what is tonic sleep bruxism?

A

at 11.4% of the time you get clenching of the teeth with NO eccentric movement

25
Q

how long per day do teeth contact when swallowing?

A

17 mins

26
Q

how long per day do teeth contact when chewing?

A

9 mins

27
Q

what is the approximated time per night people grind their teeth?

A

38 minutes with avg 5-6 seconds per event

28
Q

average biting force?

A

756 N, during bruxism it can be 3-10 times greater

29
Q

Describe category 1?

A

Excessive wear WITH LOSS OF OVD. VERY difficult to restore

30
Q

what is category 2?

A

excessive wear WITHOUT loss of OVD, but iwht space available for restoration.

Best case?

31
Q

what is category 3?

A

excessive wear WIHTOUT loss of OVD, but with LIMITED SPACE! refer cat 3 to prostH!

32
Q

what is the most difficult category to restore?

A

cat 1, then cat 3

33
Q

occlusal device can reduce muscle activity up to what percent?

A

upt o 25%

34
Q

what happens if you violate the space of Donder?

A

you can get tongue retraction

this will lead to activation of the lateral pterygoid muscles = protrusion to open the airway and bruxism

35
Q

does a splint unload the joint?

A

Remember – Splints [Occlusal device] do NOT unload the joint!

36
Q

T/F

Increasing the OVD distracts the condyles down, it DOES NOT simply ROTATES them while they are still loaded.

A

FALSE to both

37
Q

what are contraindications to using an occlusal device?

A

severe retrognathia/micrognathia

lingually tipped mandibular molars and pre-molars

mobile maxillary anterior teeth! (mmakes sense- you can’t wear a device is your teeth are wiggly!)

anterior open bite

OSAS

enlarge tongue/tongue dispacement

Occlusion (10 decks)

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