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Bruxism - Quiz
Contributed by: Kay
  • 1. What was the historical belief regarding the primary cause of bruxism?
A) Dietary deficiencies
B) Problems with the bite
C) Genetic predisposition
D) Neurological disorders
  • 2. According to modern sources, what is the relationship between bruxism and occlusal factors?
A) A proven genetic link
B) A strong causative relationship
C) No relationship or a minimal relationship
D) An inverse relationship
  • 3. Can people without teeth experience bruxism?
A) No, it requires natural teeth
B) Only children can
C) Yes, even those wearing dentures
D) Only if they have implants
  • 4. What did studies suggest regarding the relationship between occlusal factors and bruxism in children?
A) There is definitely no relationship
B) There is a stronger relationship than in adults
C) There is no evidence to support this
D) There may be more of a relationship
  • 5. Which psychosocial factor is most commonly cited as a risk for bruxism?
A) Lack of sleep
B) High caffeine intake
C) Physical inactivity
D) Stressful lifestyle
  • 6. Stress has a stronger relationship with which type of bruxism?
A) Sleep bruxism
B) Awake bruxism
C) Nocturnal clenching
D) Childhood-onset bruxism
  • 7. What personality traits are commonly associated with bruxism?
A) Aggressive, competitive, or hyperactive
B) Easy-going and relaxed
C) Passive and withdrawn
D) Extroverted and social
  • 8. What did the study by Rosales et al. on rats suggest about bruxism?
A) Emotional stress can cause bruxism-like behavior
B) Sleep deprivation causes bruxism
C) Dietary changes cause bruxism
D) Physical injury causes bruxism
  • 9. What percentage of people with sleep bruxism have a direct family member who had it in childhood?
A) 21–50%
B) 5–10%
C) 100%
D) 75–90%
  • 10. Have specific genetic markers for bruxism been identified?
A) Yes, one specific marker
B) Yes, in awake bruxism only
C) Yes, several have been found
D) No, none have been identified
  • 11. When does awake bruxism often occur?
A) Immediately upon waking
B) Only during physical exercise
C) During periods of concentration
D) During deep sleep
  • 12. What is the common historical explanation for why people grind their teeth regarding their bite?
A) Teeth alignment
B) Stress relief
C) Jaw strengthening
D) Self-equilibration
  • 13. What is noted about children with sleep bruxism regarding anxiety?
A) They show greater levels of anxiety
B) Anxiety is unrelated to sleep bruxism
C) They show lower levels of anxiety
D) They show no difference from other children
  • 14. Which of the following is considered a stressful life event that may intensify bruxism?
A) Watching television
B) Family bereavement
C) Taking a nap
D) Eating dinner
  • 15. What does the text suggest about removing occlusal interferences for sleep bruxism?
A) It significantly reduces grinding
B) It works for adults but not children
C) It is the primary cure
D) There is no evidence it has an impact
  • 16. How is awake bruxism usually classified in terms of control?
A) Reflexive
B) Fully conscious
C) Semivoluntary
D) Completely involuntary
  • 17. In children, what might be a potential cause of bruxism?
A) Early tooth loss
B) Lack of exercise
C) Excessive reading
D) Teething
  • 18. What is the primary action typically involved in awake bruxism?
A) Clenching
B) Lip biting
C) Jaw snapping
D) Excessive drooling
  • 19. Which of the following is considered a semivoluntary oral habit associated with awake bruxism?
A) Laughing
B) Sneezing
C) Snoring
D) Nail biting
  • 20. What is the primary physiological mechanism suggested for sleep bruxism?
A) Respiratory blockages
B) Peripheral muscle fatigue
C) Digestive disorders
D) Central nervous system mechanisms
  • 21. What does the abbreviation RMMA stand for in the context of sleep bruxism?
A) Rapid mandibular muscle adjustment
B) Rhythmic mandibular movement arousal
C) Resting muscle maintenance activity
D) Rhythmic masticatory muscle activity
  • 22. What percentage of sleep bruxism episodes occur during sleep arousal?
A) 50%
B) 86%
C) 25%
D) 100%
  • 23. What accompanies sleep arousals besides bruxism?
A) Decreased heart rate
B) Hypothermia
C) Increased heart rate
D) Loss of vision
  • 24. What physical position is mentioned as being linked to sleep bruxism episodes?
A) Fetal position
B) Side sleeping
C) Prone
D) Supine
  • 25. What system disturbance is suggested to be involved in the etiology of bruxism?
A) Respiratory system
B) Endocrine system
C) Digestive system
D) Dopaminergic system
  • 26. Why are smokers thought to have a higher incidence of bruxism?
A) Nicotine causes tooth decay.
B) Smoking relaxes jaw muscles.
C) Smoking increases oxygen intake.
D) Nicotine stimulates dopamine release.
  • 27. Which medication is mentioned as having a modifying effect on bruxing activity?
A) Aspirin
B) Insulin
C) Levodopa
D) Penicillin
  • 28. Which of the following is a symptom associated with the episodes of sleep bruxism?
A) Constant sleep depth
B) Stable pH levels
C) Gastroesophageal reflux
D) Increased salivary flow
  • 29. When are the symptoms of sleep bruxism typically most intense?
A) Before going to sleep
B) Immediately after waking
C) During a nap
D) In the middle of the afternoon
  • 30. What is the clinical term for restricted mouth opening associated with bruxism?
A) Trismus
B) Morsicatio buccarum
C) Linea alba
D) Glossodynia
  • 31. Where is pain often located when associated with the temporalis muscle in bruxism?
A) The forehead
B) The chin
C) The temples
D) The bridge of the nose
  • 32. What does 'otalgia' refer to in the context of bruxism?
A) Infection of the ear canal
B) Ringing in the ears
C) Hearing loss
D) Pain referred to the ear
  • 33. What is the primary way bruxism is usually detected?
A) By a partner waking up the patient
B) By X-rays of the brain
C) By observing effects like tooth wear and pain
D) By blood tests
  • 34. Which body system components are affected by the forces generated during bruxism?
A) Teeth, periodontium, and temporomandibular joints
B) Only the teeth and gums
C) Only the jaw muscles
D) The teeth and the tongue
  • 35. What is the global prevalence of bruxism according to the text?
A) Approximately 22%
B) 50%
C) 8%
D) 5%
  • 36. Which of these is a common symptom of bruxism?
A) Bleeding gums
B) Difficulty swallowing
C) Aching jaw muscles
D) Increased appetite
  • 37. Which demographic is more commonly affected by awake bruxism?
A) Women
B) Children
C) Men
D) The elderly
  • 38. What is the reported prevalence of bruxism in people over the age of 60?
A) 14%
B) 22%
C) Approximately 3%
D) 8%
  • 39. Which region has the highest prevalence of sleep bruxism?
A) North America
B) South America
C) Asia
D) Europe
  • 40. Which region has the highest prevalence of awake bruxism?
A) South America
B) Asia
C) North America
D) Europe
  • 41. What percentage of the general population does the ICSD-R estimate will grind their teeth at some point in life?
A) 22%
B) 43%
C) 5%
D) 85–90%
  • 42. According to the 2024 meta-analysis, what is the prevalence of awake bruxism?
A) 23%
B) 3%
C) 43%
D) 21%
  • 43. Which muscle is associated with pain in the temple?
A) Buccinator
B) Temporalis
C) Trapezius
D) Masseter
  • 44. What can happen to the jaw joint due to bruxism?
A) Total ossification
B) Permanent detachment
C) Clicking
D) Discoloration
  • 45. What is the association between TMD pain and self-reported bruxism?
A) Positive association
B) Negative association
C) Inverse relationship
D) No association
  • 46. What can severe, chronic bruxism lead to in the temporomandibular joints?
A) Arthritis
B) Increased bone density
C) Complete joint fusion
D) Improved mobility
  • 47. What is the term for tooth wear caused by tooth-to-tooth contact?
A) Abfraction
B) Erosion
C) Fremitus
D) Attrition
  • 48. Which surface of the tooth is primarily affected by attrition?
A) Facial surface
B) Root surface
C) Cervical region
D) Occlusal surface
  • 49. What is the term for tooth movement occurring during occlusal loading?
A) Abfraction
B) Fremitus
C) Attrition
D) Resorption
  • 50. According to the text, what is the most common cause of tooth mobility?
A) Periodontal disease
B) Bruxism
C) Medial pterygoid spasms
D) Fremitus
  • 51. What is the primary treatment for periodontal disease even when occlusal forces are high?
A) Mandible repositioning surgery
B) Plaque control
C) Total extraction of teeth
D) Elaborate occlusal adjustments
  • 52. What shape are abfraction cavities typically described as?
A) Rectangular
B) Irregular pits
C) V-shaped
D) Circular
  • 53. Besides attrition and abfraction, what other factor is said to contribute to tooth wear in some bruxists?
A) Fremitus
B) Gumline recession
C) Plaque buildup
D) Erosion
  • 54. How long are teeth typically in contact during a normal day?
A) They are in contact all day
B) Less than 20 minutes
C) Exactly 2 hours
D) More than 60 minutes
  • 55. Which condition is suspected as a possible cause of bruxism?
A) Ankyloglossia
B) Hyperactivity of the tongue
C) Excessive saliva production
D) Chronic nasal congestion
  • 56. Which muscles are primarily involved in sideways grinding?
A) Medial pterygoid muscle
B) Temporalis muscle
C) Lateral pterygoids
D) Masseter muscle
  • 57. What is the typical state of the jaw during sleep in individuals without bruxism?
A) Rhythmically moving
B) Always vibrating
C) Usually clenched
D) Usually open
  • 58. Which substance is mentioned as being able to exacerbate bruxism when consumed in excess?
A) Fluoride
B) Caffeine
C) Calcium
D) Vitamin C
  • 59. Which drug is noted for causing bruxism that occurs immediately after use and for several days afterward?
A) Caffeine
B) Fluoxetine
C) Lithium
D) MDMA
  • 60. What term describes a part of the bite meeting sooner than other parts?
A) Premature contact
B) Ideal occlusion
C) Occlusal harmony
D) Deflective stabilization
  • 61. What is the difference between a premature contact and a deflective interference?
A) They are the exact same thing
B) Premature contact only happens with wisdom teeth
C) Deflective interference implies a dynamic abnormality
D) Deflective interference refers only to front teeth
  • 62. Which of the following is commonly associated with an over-erupted upper wisdom tooth?
A) A symptom of Parkinson's disease
B) A deficiency in caffeine
C) An ideal occlusion
D) A deflective interference
  • 63. Which medication is mentioned as a treatment for ADHD that is linked to bruxism?
A) Citalopram
B) Methylphenidate
C) Lithium
D) Fluoxetine
  • 64. Which of these substances is NOT listed as a potential contributor to bruxism?
A) Fluvoxamine
B) Penicillin
C) Venlafaxine
D) Cocaine
  • 65. What is a device used to confirm clenching in bruxism patients?
A) Bruxchecker
B) Thermometer
C) Oximeter
D) Stethoscope
  • 66. Which disorder must be excluded when diagnosing sleep bruxism due to similar rhythmic jaw movements?
A) Allergies
B) Seizure disorders
C) Diabetes
D) Common cold
  • 67. Which of the following is an example of an electromyographic device used to measure muscle activity?
A) Individual Tooth-Wear Index
B) Beeswax biteplate
C) Grindcare
D) Sound-activated tape recorder
  • 68. From which language is the term 'bruxism' derived?
A) Greek
B) French
C) Latin
D) German
  • 69. What was removed from the definitions of sleep and awake bruxism in the 2025 consensus update?
A) The distinction between clenching and grinding
B) In otherwise healthy individuals
C) The reference to circadian rhythms
D) The mention of the masseter muscle
  • 70. What does the 2025 consensus update recommend to improve communication in the field?
A) Only using device-based assessments
B) Focusing only on clinical examination
C) Removing the term bruxism entirely
D) Standardized terminology
  • 71. Which of the following is described as an oral habit consisting of rhythmic or spasmodic non-functional gnashing?
A) Normal chewing
B) Masticatory function
C) Sleep apnea
D) Parafunctional grinding
  • 72. What is an abbreviation used for awake bruxism?
A) AB
B) SB
C) ASB
D) DBR
  • 73. How did the ICSD-2 reclassify sleep bruxism?
A) As a psychological condition
B) As a parasomnia
C) As a diurnal movement disorder
D) As a sleep related movement disorder
  • 74. What term did the ICSD-R use to define sleep bruxism?
A) A chronic dental disease
B) An awake grinding disorder
C) A stereotyped movement disorder
D) A nighttime psychological condition
  • 75. What was sleep bruxism classified as in the ICSD-R?
A) A dental pathology
B) An awake movement disorder
C) A sleep related movement disorder
D) A parasomnia
  • 76. What is secondary bruxism associated with?
A) Other medical conditions
B) Idiopathic factors
C) Psychosocial factors only
D) No other medical condition
  • 77. How is chronic sleep bruxism defined by duration?
A) Exactly one month
B) Less than a week
C) Over a month
D) Between one and two weeks
  • 78. What type of treatment is recommended due to low risk of morbidity?
A) Irreversible dental modification
B) Reversible treatment
C) High-dosage medication
D) Surgical intervention
  • 79. What is the simplest form of psychosocial treatment for bruxism?
A) Reassurance
B) Medication
C) Hypnotherapy
D) Cognitive behavioral therapy
  • 80. How can awake bruxism be reduced in many cases?
A) Using reminder techniques
B) Strict dietary changes
C) Avoiding all social contact
D) Complete immobilization of the jaw
  • 81. Which of these is mentioned as a potential management strategy?
A) Cognitive behavioral therapy
B) Tooth extraction
C) Jaw wiring
D) Heavy sedation
  • 82. Which medication is mentioned as a potential solution when bruxism is caused by SSRI usage?
A) Amitriptyline
B) Clonazepam
C) Buspirone
D) Propranolol
  • 83. Which type of splint is typically better tolerated by people with a sensitive gag reflex?
A) Upper splints
B) Full-coverage acrylic splints
C) NTI-TSS guards
D) Lower splints
  • 84. Which type of botulinum toxin is mentioned as effective for bruxism in the 2020 overview?
A) Type A
B) Type D
C) Type C
D) Type B
  • 85. What is a rare but documented adverse effect of botulinum toxin injections?
A) Permanent paralysis
B) Bruising
C) Total loss of taste
D) Systemic infection
  • 86. What type of devices are used to manage awake bruxism via biofeedback?
A) Fixed occlusal splints
B) Surgical implants
C) Chemical sensory triggers
D) Electromyographic monitoring devices
  • 87. Which of the following might be involved in an occlusal reorganization procedure?
A) Botulinum toxin injections
B) Dietary changes
C) Orthodontics
D) Biofeedback sensors
  • 88. Who documented the definition of bruxism in the year 610?
A) Xu Shen
B) Chao Yuanfang
C) Sigurd Peder Ramfjord
D) Wang Huaiyin
  • 89. Who suggested the term 'La bruxomanie' in 1907?
A) Chao Yuanfang
B) Bertrand S. Frohman
C) Marie Pietkiewics
D) Sigurd Peder Ramfjord
  • 90. Who is credited with coining the term 'bruxism' in 1931?
A) Xu Shen
B) Marie Pietkiewics
C) Wang Huaiyin
D) Bertrand S. Frohman
  • 91. Which periodontist championed the theory that occlusal factors caused bruxism in the 1960s?
A) Marie Pietkiewics
B) Chao Yuanfang
C) Sigurd Peder Ramfjord
D) Bertrand S. Frohman
  • 92. What is the current prevailing scientific model for the etiology of bruxism?
A) Purely genetic model
B) Multifactorial, biopsychosocial model
C) Purely behavioral model
D) Primary malocclusion model
  • 93. What emotion is often displayed by clenching teeth in humans and animals?
A) Contentment
B) Surprise
C) Anger
D) Happiness
  • 94. How many times does the phrase 'weeping and gnashing of teeth' appear in the Gospel of Matthew?
A) 10 times
B) 7 times
C) Once
D) 3 times
  • 95. In the Chinese proverb mentioned, what does it mean if a girl clenches her teeth?
A) She is angry at her father
B) She is hungry
C) She is trying to be prosperous
D) She hates her mother
  • 96. Which character in the film 'Requiem for a Dream' develops bruxism due to diet pills?
A) Henry Spencer
B) Grendel
C) Bobbi Anderson
D) Sara Goldfarb
  • 97. Which character in 'A Song of Ice and Fire' grinds his teeth loud enough to be heard half a castle away?
A) Henry Spencer
B) Beowulf
C) Hrothgar
D) Stannis Baratheon
  • 98. What do people in rave culture use to reduce dental damage from ecstasy-induced bruxism?
A) Drinking water
B) Pacifiers
C) Mouth guards
D) Ice cubes
  • 99. Bruxism is considered a potential contributing factor to which condition associated with methamphetamine use?
A) Tooth decay
B) Dry mouth
C) Meth mouth
D) Gum disease
  • 100. In the film 'Eraserhead', which character demonstrates sleep bruxism?
A) Henry Spencer
B) The lady in the radiator
C) Mary X
D) The baby
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