All Free Oral Pathology and Medicine MCQs with Answers
Every Oral Pathology and Medicine question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
833 questions · page 18 of 42
- A. Thin and long
- B. Thick and short
- C. thin and short
- D. Fused
Explanation: In cleidocranial dysplasia, permanent teeth are often unerupted and may have short, slender roots.
Correct answer: thin and short- A. Cleidocranial dysostosis
- B. Ectodermal dysplasia
- C. Gardner's syndrome
- D. Osteogenesis imperfecta
Explanation: Gardner syndrome combines multiple osteomas, epidermoid or sebaceous cysts, and numerous impacted supernumerary teeth.
Correct answer: Gardner's syndrome- A. Primary hyperparathyroidism
- B. Metastatic bone disease
- C. Osteomalacia
- D. Paget's disease of the bone
Explanation: An isolated marked rise in alkaline phosphatase with normal calcium, phosphate, and liver tests in an elderly patient strongly suggests…
Correct answer: Paget's disease of the bone- A. Osteopetrosis
- B. steomyelitis
- C. condensing osteitis
- D. Osteomalacia
Explanation: Albers-Schönberg disease is the classic name for osteopetrosis, a disorder in which defective bone resorption produces abnormally dense…
Correct answer: Osteopetrosis- A. Osteogenesis imperfecta
- B. Osteopetrosis
- C. Osteochondroma
- D. Hyperparathyroidism
Explanation: Osteopetrosis causes defective osteoclast-mediated resorption, producing diffusely radiopaque bones that are paradoxically brittle and…
Correct answer: Osteopetrosis- A. Klinefelter's syndrome
- B. Trisomy 21
- C. Down's syndrome
- D. Cleidocranial dysostosis
Explanation: Multiple impacted supernumerary teeth with the ability to approximate the shoulders strongly indicates cleidocranial dysostosis, which…
Correct answer: Cleidocranial dysostosis- A. Osteogenesis imperfecta
- B. Osteoporosis
- C. Osteitis deformans
- D. Osteitis fibrosa cystic
Explanation: Osteogenesis imperfecta results from defective type I collagen and classically produces fragile bones, blue sclerae and opalescent or…
Correct answer: Osteogenesis imperfecta348. A patient complains of loss of visual acuity, deafness and enlargement of maxilla_______________?
- A. Osteomalacia
- B. Paget's disease
- C. Fibrous dysplaisa
- D. Osteogenesis imperfecta
Explanation: Paget disease can enlarge the maxilla and skull, while excessive bone around the optic and auditory foramina may cause visual impairment…
Correct answer: Paget's disease- A. Traumatic arthritis
- B. Trigeminal neuralgia
- C. Myofacial pain dysfunction syndrome
- D. Degenerative arthritis
Explanation: Myofascial pain dysfunction syndrome is the commonest source of pain involving the muscles of mastication and the TMJ region.
Correct answer: Myofacial pain dysfunction syndrome- A. None of the above
- B. Subluxation
- C. Dislocation
- D. Fibrous ankylosis
Explanation: Rheumatoid inflammation of the TMJ can destroy the condyle and lead to fibrous ankylosis, producing restricted mandibular movement.
Correct answer: Fibrous ankylosis- A. Pagets disease
- B. Osteopetrosis
- C. Cherubism
- D. Fibrous dysplasia
- E. A and D
Explanation: Alkaline phosphatase rises with increased bone turnover, as in Paget disease and fibrous dysplasia.
Correct answer: A and D- A. Rheumatoid arthritis
- B. Osteoarthritis
- C. Childhood illness
- D. Trauma
Explanation: Trauma is the commonest cause of TMJ ankylosis because intra-articular bleeding and scarring can fuse the condyle to the temporal bone.
Correct answer: Trauma- A. Retrognathia
- B. Periodontal disease
- C. Premature loss off deciduous teeth
- D. Delayed eruption of deciduous teeth
Explanation: Down syndrome is associated with midface hypoplasia and a relative mandibular prognathism, not true retrognathia.
Correct answer: Retrognathia354. The primary causative factor for myofacial pain dysfunction syndrome of the TMJ is_______________?
- A. Infratemporal space infection
- B. Muscular overextension and over contraction
- C. Auriculotemporal neuritis
- D. Otitis media
Explanation: Myofascial pain dysfunction is chiefly related to abnormal muscle activity, including overextension and sustained contraction of the…
Correct answer: Muscular overextension and over contraction- A. Osteogenesis imperfecta
- B. Cherubism
- C. Fibrous dysplasia
- D. Paget's disease
Explanation: A cotton-wool radiographic pattern combined with raised alkaline phosphatase strongly indicates Paget disease, reflecting disorganized…
Correct answer: Paget's disease- A. Paget's disease of bone
- B. Albright's syndrome
- C. Osteomalacia
- D. Osteogenesis imperfecta
Explanation: Paget disease of bone can rarely undergo sarcomatous transformation, classically to osteosarcoma or fibrosarcoma.
Correct answer: Paget's disease of bone- A. Osteopetrosis
- B. Central giant cell granuloma
- C. Paget's disease of the bone
- D. Polyostotic fibrous dysplasia
Explanation: Central giant cell granuloma is typically a solitary lesion affecting one bone.
Correct answer: Central giant cell granuloma- A. Mohr's syndrome
- B. Sturge-Weber Syndrome
- C. Proteus Syndrome
- D. Rubinstein Taybi Syndrome
Explanation: A talon cusp, the prominent accessory cusp on an anterior tooth, is reported with Mohr syndrome, Sturge-Weber syndrome, and…
Correct answer: Proteus Syndrome- A. Upward sloping of the palpebral fissure
- B. No loss of hearing
- C. Progenia and mandibular prognathism
- D. Poorly developed or absence of malar bones
Explanation: Treacher Collins syndrome results from first and second branchial arch abnormalities, producing marked hypoplasia or absence of the malar…
Correct answer: Poorly developed or absence of malar bones- A. Edward's syndrome
- B. Klinefelter's syndrome
- C. Rubinstein Taybi syndrome
- D. Down's syndrome
Explanation: Talon cusp is a prominent accessory cusp on an anterior tooth and is classically associated with Rubinstein-Taybi syndrome.
Correct answer: Rubinstein Taybi syndrome