MOSBY: General and Oral Pathology
(NBDHE) Exam Questions and
Answers 100% Pass
Which intraosseous cyst occurs around the crown of an unerupted tooth?
A. Eruption
B. Primordial
C. Dentigerous
D. Globulomaxillary - ANSWER-C.
A dentigerous cyst (C) occurs around the crowns of unerupted or developing
tooth. An eruption cyst (A), which is similar to a dentigerous cyst, is found in the
soft tissue around the crown of an erupting tooth. A primordial cyst (B) develops
in the place of a tooth because of a disturbance in the tooth germ. A
globulomaxillary cyst (D) is a well-defined, pear-shaped radiolucency found
between the roots of the maxillary lateral incisor and the canine.
Which condition occurs when the cementum or dentin of a tooth fuses with the
surrounding alveolar bone?
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 1
,A. Concrescence
B. Ankylosis
C. Impaction
D. Gemination - ANSWER-B.
Ankylosis (B) is the condition in which the cementum or dentin of a tooth fuses
with the surrounding alveolar bone. A primary or permanent tooth fuses with the
surrounding alveolar bone, with no intervening PDL. Concrescence (A) is fusion
of the cementum of two adjacent teeth only. With impaction (C), or when a tooth
is said to be impacted, the tooth cannot erupt because of a physical obstruction.
Gemination (D) is a developmental anomaly that occurs when a single tooth germ
attempts to divide and results in the incomplete formation of two teeth.
Aphthous ulcers typically occur in all of these sites EXCEPT one. Which one is
the EXCEPTION?
A. Labial commissure
B. Attached gingiva
C. Bucca mucosa
D. Soft palate - ANSWER-B.
Aphthous ulcers typically do not occur in the keratinized attached gingiva (B).
Which bluish-gray lesion may appear as a radiopaque area on a dental image?
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 2
,A. Hematoma
B. Amalgam tattoo
C. Epulis fissuratum
D. Traumatic neuroma - ANSWER-B.
An amalgam tattoo (B) may appear intraorally as a flat, bluish-gray lesion of the
oral mucosa. If any amalgam particles are dispersed in tissue, the tattoo may appear
radiopaque on a dental image and appear bluish-gray intraorally. A hematoma (A)
is a collection of blood within tissue as a result of trauma. An epulis fissuratum (C)
is a soft tissue lesion associated with ill-fitting dentures and is not likely to be seen
radiographically. A traumatic neuroma (D) is a benign neoplasm of nerve cells. Soft
tissue lesions such as a hematoma, an epulis fissuratum, or a traumatic neuroma are
not visible on dental images.
Pericoronitis occurs most commonly in which location?
A. Maxillary first premolars
B. Maxillary central incisors
C. Mandibular third molars
D. Mandibular second molars - ANSWER-C.
Mandibular third molars (C) are the most common locations for the occurrence of
pericoronitis, an inflammation of the tissue around a partially erupted tooth.
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 3
, Pericoronitis occasionally occurs during the eruption of mandibular second molars
(D), but much less frequently.
There are several types of candidiasis, including erythermatous candidiasis and
denture candidiasis. Regardless of the type, all forms must be treated with
antibiotics.
A. Both statements are true
B. Both statements are false
C. The first statement is true, the second is false
D. The first statement is false, the second is true - ANSWER-C.
Regardless of type, all forms must be treated with anti fungal medications.
Enamel hypoplasia is caused by ameloblast formation of too much enamel.
Enamel hypocalcification occurs when there is too little enamel formation.
A. Both statements are true
B. Both statements are false
C. The first statement is true, the second is false
D. The first statement is false, the second is true - ANSWER-B.
Enamel hypoplasia occurs when there is too little enamel formation (not too
much), and enamel hypocalcification is caused by a defect in mineralization of
enamel, not the amount of enamel formed. Both enamel hypoplasia and enamel
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 4
(NBDHE) Exam Questions and
Answers 100% Pass
Which intraosseous cyst occurs around the crown of an unerupted tooth?
A. Eruption
B. Primordial
C. Dentigerous
D. Globulomaxillary - ANSWER-C.
A dentigerous cyst (C) occurs around the crowns of unerupted or developing
tooth. An eruption cyst (A), which is similar to a dentigerous cyst, is found in the
soft tissue around the crown of an erupting tooth. A primordial cyst (B) develops
in the place of a tooth because of a disturbance in the tooth germ. A
globulomaxillary cyst (D) is a well-defined, pear-shaped radiolucency found
between the roots of the maxillary lateral incisor and the canine.
Which condition occurs when the cementum or dentin of a tooth fuses with the
surrounding alveolar bone?
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 1
,A. Concrescence
B. Ankylosis
C. Impaction
D. Gemination - ANSWER-B.
Ankylosis (B) is the condition in which the cementum or dentin of a tooth fuses
with the surrounding alveolar bone. A primary or permanent tooth fuses with the
surrounding alveolar bone, with no intervening PDL. Concrescence (A) is fusion
of the cementum of two adjacent teeth only. With impaction (C), or when a tooth
is said to be impacted, the tooth cannot erupt because of a physical obstruction.
Gemination (D) is a developmental anomaly that occurs when a single tooth germ
attempts to divide and results in the incomplete formation of two teeth.
Aphthous ulcers typically occur in all of these sites EXCEPT one. Which one is
the EXCEPTION?
A. Labial commissure
B. Attached gingiva
C. Bucca mucosa
D. Soft palate - ANSWER-B.
Aphthous ulcers typically do not occur in the keratinized attached gingiva (B).
Which bluish-gray lesion may appear as a radiopaque area on a dental image?
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 2
,A. Hematoma
B. Amalgam tattoo
C. Epulis fissuratum
D. Traumatic neuroma - ANSWER-B.
An amalgam tattoo (B) may appear intraorally as a flat, bluish-gray lesion of the
oral mucosa. If any amalgam particles are dispersed in tissue, the tattoo may appear
radiopaque on a dental image and appear bluish-gray intraorally. A hematoma (A)
is a collection of blood within tissue as a result of trauma. An epulis fissuratum (C)
is a soft tissue lesion associated with ill-fitting dentures and is not likely to be seen
radiographically. A traumatic neuroma (D) is a benign neoplasm of nerve cells. Soft
tissue lesions such as a hematoma, an epulis fissuratum, or a traumatic neuroma are
not visible on dental images.
Pericoronitis occurs most commonly in which location?
A. Maxillary first premolars
B. Maxillary central incisors
C. Mandibular third molars
D. Mandibular second molars - ANSWER-C.
Mandibular third molars (C) are the most common locations for the occurrence of
pericoronitis, an inflammation of the tissue around a partially erupted tooth.
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 3
, Pericoronitis occasionally occurs during the eruption of mandibular second molars
(D), but much less frequently.
There are several types of candidiasis, including erythermatous candidiasis and
denture candidiasis. Regardless of the type, all forms must be treated with
antibiotics.
A. Both statements are true
B. Both statements are false
C. The first statement is true, the second is false
D. The first statement is false, the second is true - ANSWER-C.
Regardless of type, all forms must be treated with anti fungal medications.
Enamel hypoplasia is caused by ameloblast formation of too much enamel.
Enamel hypocalcification occurs when there is too little enamel formation.
A. Both statements are true
B. Both statements are false
C. The first statement is true, the second is false
D. The first statement is false, the second is true - ANSWER-B.
Enamel hypoplasia occurs when there is too little enamel formation (not too
much), and enamel hypocalcification is caused by a defect in mineralization of
enamel, not the amount of enamel formed. Both enamel hypoplasia and enamel
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 4
