(51-100) Dental pathology
Tooth under occlusal trauma shows?
Bone resorption
Necrosis of the pulp
Hypercementosis
Triangulation
All of the above
As far as localised alveolar osteitis is concerned; which one of the following is true?
The incidence in the mandible and maxilla is similar
The prophylactic prescription of antibiotics prior to extraction reduces the incidence.
Excessive fibrinolysis is the likely aetiology
Purulent exudate must be seen for a diagnosis and irrigation ismandatory
Zinc oxide eugenol and alvogyl dressing promote a rapid bone growth
A child has sustained a traumatic exposure of primary central incisor, he presents to you for treatment two days after the injury. Which of the following should be considered?
Pulpotomy and Ca(OH)2
Pulpotomy and formocresol
Direct pulp capping
Pulpectomy (RCT)
Patient presents with rapidly progressive root caries on many teeth. Which of the following laboratory results would be a possible indicator of this?
A. Stimulated salivary secretion rate of 1.5ml/min
S. Mutans concentration of 105 organism/ml
A plaque sample containing 5% S. mutans
A lactobacilli concentration of 105 organism/ml
E. Salivary buffering PH 5.5
Which of the following is NOT characteristic of Down’s syndrome?
Decreased neutrophil function
Macroglossia
Macrodontia
An increased susceptibility to periodontal disease
Congenitally missing teeth
In developing plaque; the adhesive polymer produced by streptococcus mutans is synthesis from?
Glucose
Fructose
Sucrose
Lactose
Amylose
In which situation the translucency of a tooth is lost?
Death of the pulp
Complete calcification of pulp chamber
Hyperaemia
Pulp stone
All of the above
Infection with new bone formation is?
Garr’s osteomyelitis
Condensing osteitis
Torus
All of the above
Community water fluoridation MOST effectively achieves is**?
90-95% reduction of caries
45-55% reduction of caries
Reduces pit and fissures caries more than smooth surfaces
Reduces smooth surfaces more than pit and fissures
Size of pulp chamber within the tooth is influenced by?
Age
Parafunctional
History of the tooth /abrasion, erosion, caries/
All of the above
Lamina dura is actually ?
Cortical bone
Spongy bone
Immature bone
Cribriform plate perforated by nutrient carnally
Bitewing x rays are taken to assist in the detection of caries**?
Occlusally
Lingually
Buccally
Gingivally
Interproximally
The objective of pulpotomy is to ?
Preserve vitality of coronal pulp
Preserve vitality of entire pulp
Preserve vitality of radicular pulp
Regenerate a degenerated and necrotic pulp
None of the above
What contra indicate pulp capping?
Accidental exposure on vital young molars
When inflammation of radicular pulp is already present
When roots are greatly curved and tortuous
When anterior tooth is vital and immature with wide open apices
None of the above
Hypoplasia as seen in x rays**?
Thick enamel surface
Thin enamel surface
Sometimes large pulp chamber
Can not be detected on X rays
Which of the following is LEAST likely to cause pain?
Carious pulp exposure.
Chronic hyperplastic pulpitis (pulp polyp).
Acute pulpitis.
Apical periodontitis.
Which of the following may affect the results of electric pulp testing?
Emotional factors.
Pain threshold.
Analgesics.
Recent trauma.
All of the above.
Which one of the following is the initial treatment for internal resorption?
Pulpectomy.
Pulpotomy.
Pulp capping.
Apicoectomy.
What clinical evidence would support a diagnosis of acute dento-alveolar abscess?
1.Anegativereaction to the electric vitality tester.
2.A positive reaction of short duration to cold.
3.A positive reaction to percussion.
4.Presence of a draining fistula.
(1) (2) (3)
(1) and (3)
(2) and (4)
(4) only
All of the above.
Which of the following tests is most useful in differentiating between an acute apical abscess and an acute periodontal abscess?
Palpation.
Radiography.
Percussion.
Pulp vitality.
Which of the following microorganisms are most frequently found in infected root canals?
Streptococcus viridans.
Staphylococcus aureus.
Lactobacilli.
Enterococci.
Staphylococcus albus.
Function(s) of the dental pulp include(s) ?
1.defensive.
2.sensory.
3.circulatory.
4.dentin repair.
1) (2) (3)
(1) and (3)
(2) and (4)
(4) only
All of the above
When percussion on the occlusal surface of a tooth results in a positive response, the most likely etiology of inflammation is?
Pulpal.
Periodontal.
Periapical.
None of the above
An acute periapical abscess must be associated with :?
1.pain.
2.sensitivity to percussion.
3.non-vital tooth.
4.periapical radiolucency.
(1) (2) (3)
(1) and (3)
(2) and (4)
(4) only
All of the above
A 6 year old patient has an intrusive injury to tooth 5.2. All of the following are possible sequelae to the permanent successor EXCEPT?
Enamel hypoplasia.
Root dilaceration.
Delayed eruption.
Ectopic eruption
The most appropriate emergency management of a mature permanent tooth with acute irreversible pulpitis is?
Trephination
Apical surgery
Pulpotomy
Pulpectomy
Incision and drainage
A radiograph reveals a radiolucency associated with the apex of tooth 1.5. There is a large restoration but the tooth is asymptomatic and the associated soft tissues appear normal. What is the most likely diagnosis?
Chronic suppurative periradicular periodontitis.
Acute periradicular periodontitis
Chronic periradicular periodontitis.
Acute periradicular abscess
A patient has spontaneous pain and intense sensitivity to cold with lingering pain. The most likely diagnosis is?
Chronic periradicular periodontitis
Chronic irreversible pulpitis
Acute irreversible pulpitis
Acute periradicular periodontitis
The permanent anterior tooth that exhibits the greatest variation in size and shape is the?
Mandibular lateral incisor
Maxillary central incisor
Maxillary lateral incisor
Mandibular central incisor
A patient presents with a 3 week history of prolonged tooth pain to hot and cold. Three days ago, the symptoms changed to moderate pain on biting combined with a dull, spontaneous ache relieved by cold. The most likely diagnosis is?
Reversible pulpitis
A vertical root fracture
Chronic periradicular abscess
Acute pulpitis with periradicular periodontitis
A cracked tooth
Amelogenesis imperfecta is?
Associated with osteogenesis imperfecta
Caused by environmental factors
A hereditary condition with different inheritance patterns
A multifactorial disorder
Dilated odontome is a synonym of?
Dens invaginatus
Talon cusp
Dens evaginatus
Macrodontia
The base of invagination of crown/root in dens invaginates contains?
Dystrophic dentin
Dystrophic enamel
Necrotic pulp tissue
Dystrophic cementum
The appearance of normal thickness enamel with extremely thin dentin and abnormally large pulp chamber is indicative of?
Amelogenesis imperfecta
Dentinogenesis imperfecta Type I
Dentinogenesis Type III
Dentin dysplasia Type II
Loss of organization of radicular dentin with subsequent shortening of root length is a feature of?
Dentin dysplasia Type I
Dentin dysplasia Type II
Dentinogenesis imperfecta Type II
Dentinogenesis imperfecta Type III
Lack of development of six or more teeth is denoted by the term?
Oligodontia
Hypodontia
Anodontia
Partial anodontia
According to miller, which of these acids was held responsible for producing the lesions of dental caries, according to Miller?
Lactic acid
Ascorbic acid
Picric acid
Citric acid
Which of these factors has not been assigned an essential role in Miller’s chemicoparasitic theory of dental caries?
Carbohydrates
Microorganisms
Heredity
Acids
From the properties given below identify which one does render carbohydrates cariogenic?
Rapid clearance from oral cavity
Stickiness of carbohydrates
Frequent ingestion of carbohydrates
Simple carbohydrates
Identify which amongst the below given bacteria does not cause dental caries.?
S. mutans
L. acidophilus
A. naeslundii
S. aureus
Dental plaque contains all of the following, except?
Microorganisms
Mucin
Exudate
Desquamated epithelial cells
Which product of the streptococci is responsible for adherence of the dental plaque to the smooth surfaces of teeth?
Glucan
Glycoprotein
Glycosaminoglycan
Proteoglycan
Which is the principal buffering ion present in saliva?
Bismuth
Bicarbonate
Phosphorus
Fluoride
Which amongst the following factors does not contribute towards greater caries resistance of the surface enamel of a tooth?
Fluoride content
Slower dissolution in acids
Lesser water content
Lesser mineral content
The tooth that is most susceptible to dental caries is?
Mandibular 1st molars
Mandibular 2nd molars
Maxillary canines
Maxillary 2nd premolars
State which amongst the below given factors is not an antibacterial factor present in saliva?
Lysozyme
Lysosome
Lactoferrin
SIGA(Secretory immunoglobulinA)
The factor that is least associated with increased incidence of dental caries is?
Carbohydrate rich diet
Malposed tooth
Smoking
Quantity of saliva
Undermining of enamel occurs due to?
Lateral spread of caries midway between enamel and dentin
Lateral spread of caries at the dentinoenamel junction
Lateral spread of caries midway between dentin and pulp
Spread of caries along dentinal tubules
The least likely location for occurrence of smooth surface caries is:?
Labial surface of maxillary incisors
Proximal surfaces of all teeth
Gingival 1/3rd of buccal surfaces of teeth
Gingival 1/3rd of lingual surfaces of teeth
Which theory of dental caries proposes that organic elements in teeth are the initial pathway of invasion of microorganisms?
Sucrose chelation
Proteolytic
Autoimmune
Chemicoparasitic
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