OCE Questions with Correct Answers (Grade A+)
Question 1: Fl content in milk and soy based formulas?
Answer: Milk 0.15ppm Soy 0.21ppm
Question 2: How does SDF work? Mechanism?
Answer: Ca5(PO4)3(OH) + SDF = CaF2 (calcium fluoride) and Ag3PO4 (silver phosphate) = CaF2 forms
Ca5(PO4)3F (fluorapatite) Hydroxyapatite turns into fluorapatite. It is believed that silver turns into silver
chloride and oxidized silver is what turns the cavity black. Silver is not able to enter human cells but
bacteria only -- Disturbs cells wall, disrupts DNA replication, and disrupts metabolism
Question 3: Therapeutic dose of Xylitol? Side-effects? Mechanism?
Answer: 4 to 15 grams per day; abdominal distress and diarrhea; sugar substitute that is not metabolized by
bacteria (DOES NOT REDUCE CARIES PER EVIDENCE)
Question 4: Definition of ECC and S-ECC
Answer: ECC = DMF under six and S-ECC = smooth surface caries in three to five; 4 DMF at three, 5 DMF
at four, 6 DMF at five
Question 5: Juice recommendations
Answer: No more than 4-6oz of juice for children 1-6 yrs; no juice under one
Question 6: Amount of toothpaste for children; how many ppm of fl in toothpaste
Answer: Under 3 years old = rice size (0.1mg) 3-6 years old = pea size (0.25mg) Toothpaste 1000PPM
Question 7: How much added sugar is recommended for kids 4-8?
Answer: Less than 16g per day (10% of total energy intake)
Question 9: Recommendation for child's first visit?
Answer: No later than 12 months of age
Question 10: When should a decision on 3rd molars be made?
Answer: Before the 3rd decade (before 20)
Page 1
,Question 11: SNA (82); describe values and meanings
Answer: HORIZONTAL POSITION OF MAXILLA >85 means protrusive/prognathic MAXILLA <79
means deficient/retrognathic MAXILLA
Question 12: SNB (79); describe values and meanings
Answer: HORIZONTAL POSITION OF MANDIBLE >82 means protrusive/prognathic MANDIBLE <76
means retrognathic/retrusive MANDIBLE
Question 13: ANB (3); describe values and meanings
Answer: RELATIONSHIP BETWEEN MAX and MAND + value = class I or class II - value = class III >5
means class II jaw relationship, prognathic max or retrognathic mand <1 means class III jaw relationship,
deficient max or prognathic mand
Question 14: Wits Analysis (0 to -1mm); describe values and meanings
Answer: AP RELATIONSHIP BETWEEN MAX and MAND - value = AO behind BO behind; class III
relationship + value = AO in front of BO; class I or II relationship larger the value, the larger the
discrepancy
Question 15: Facial Angle (88); describe value and meaning
Answer: FH (Por to Orbit) and Nasion-Pognion; measures protrusiveness of mandible; larger the value the
more protrusive or prominent the chin
Question 16: Frankfort Mandibular Plane (24); describe value and meaning
Answer: DIRECTION OF GROWTH The higher the angle, the more vertical the growth direction, the more
complicated the treatment; DIVERGENT SKELETAL GROWTH PATTERN
Question 17: Y Axis - SN (3); describe value and meaning
Answer: MANDIBULAR GROWTH DIRECTION Large value = downward and vertical growth pattern
Small value = horizontal and anterior growth pattern Class II; div 1 = average to high value Class II; div 2 =
smaller y axis As mand plane and y-axis increase, chin prominence decrease
Question 18: U1 to SN (103)
Answer: INCLINATION OF THE CENTRAL INCISOR Large angle = proclination or labioversion of
incisors as seen in class II div 1 Small angle = retroclination or lingually inclined as seen in class II div 2
Question 19: L1 to MP (90) or IMPA
Answer: The greater the angle, the more LABIALLY inclined the lower incisor
Page 2
,Question 20: U1 to L1 (135)
Answer: INTERINCISOR ANGLE Smaller angle = labially inclined incisors like in class II div 1 Greater
angle = upright or retroclined incisors like in class II div 2
Question 21: Presented with 3 EOE images; describe the categories that you would discuss
Answer: OVERALL Profile: Straight, Convex, Concave Profile Type: Dolicocephalic, Brachiocephaic,
Mesiocephalic Facial Symmetry: Symmetrical, Not Symmetrical MULTIPLE VIEWS Midlines: Facial and
maxillary Nasolabial Angle: Obtuse, Acute (Normal 80-120) Lip Posture: Competence? Gingival Display:
Absent, Excessive Smile Arc/Line: Symmetric, Follows lower lip, Canted Chin Point: Prominent
Question 22: Presented with an intraoral photo; describe the categories you would discuss
Answer: Soft tissues: Gingival health, any signs of injury, pathology, abscess Hard tissues: Name dentition,
teeth visible, finding for each tooth including caries Give Caries Risk Assessment
Question 23: Presented with intraoral series: describe the categories you would discuss
Answer: Dentition: Primary, Mixed, Permanent Occlusion: Class? Arch Shape or Form Alignment and
Spacing Dental Relationship: OJ, OB
Question 24: Name components of Dental History, Medical History, Social History, Family History
Answer: Dental History = CC, Past Dental History (dental home, first visit) Medical History = HI-ROAD
(Hospitalizations, Illnesses, Review of Systems, Operations, Allergies, Drugs, Vaccinations; Diagnoses,
Medications, Allergies, Immunizations, History of Sx, Review of Systems Social History = Who lives/cares
for patient, community of residence, diet (CARIES RISK ASSESSMENT) Family History = History of
illnesses
Question 25: Components of Informed Consent
Answer: 1. Legal name and DOB 2. Legal name and relationship to patient 3. Patient's diagnosis 4. Nature
and purpose of the proposed treatment 5. Benefits and risks of treatment 6. Alternative treatment 7. Place
that indicates all questions have been answered 8. Places for signatures of the guardian, dentist, and staff
member as witness
Question 26: Components of a comp oral exam
Answer: General health/growth Pain EOE TMJ IOE Oral hygiene and periodontal health Hard tissues
Developing occlusion Habits Caries risk Behavior Anticipatory guidance
Page 3
, Question 27: Recommendations for 6 - 12 months; 12 - 24 months; 2-6 years; 6-12 years; 12 years older
Answer: ALL OF THEM Clinical oral exam Growth and development CRA Radiographs Prophy and
topical fl Fl supplementation (formula, fluoridated toothpaste) Anticipatory guidance counseling: Oral
hygiene counseling Dietary counseling (including feeding practices - bottle usage and breastfeeding, juice
recommendations, frequency of snacks and sweetened beverages) Injury prevention (play objects, car seats,
electrical cords, athletic mouthguards) Non nutritive habits (digit, pacifiers, bruxism, tongue thrust swallow,
self-mutilating behavior) 6 months - 6 years Speech language development Developmental milestones and
referral to appropriate therapeutic serves 2 years + Assessment of occlusion Sealants 6 years + Substance
abuse counseling (e-cigarettes, smokeless tobacco, alcohol) Piercings (complications include infection,
tooth fracture, edema, airway obstruction) 12 years + Transition to adult care
Question 28: When do you recommend to stop pacifier or thumb-sucking? Other anticipatory guidance
for pacifier?
Answer: By age 3 years or younger or the establishment of terminal planes of occlusion; do not tie to baby
or crib due to strangulation hazard; using past 6 months can cause increase in ear infections
Question 29: High caries risk factors for 0-5
Answer: Mother or primary caregiver has caries, low SES, greater than 3 between meal cariogenic snacks or
beverages, child put to bed with bottle More than 1 DMFS, active white spot lesions, elevated strep mutans
Question 30: Moderate caries risk factors for 0-5
Answer: Special needs, recent immigrant, plaque on teeth
Question 31: High caries risk factors for 6+
Answer: Low SES, greater than 3 between meal cariogenic snacks or beverages More than 1 interproximal
lesion, active white spot lesions, low salivary flow
Question 32: Moderate caries risk factors for 6+
Answer: Special health care needs, recent immigrant, defective restorations, wearing intraoral appliance
Question 33: CRA protective factors
Answer: Fl supplementation or water, teeth brushed daily with fl toothpaste, topical fl from professional,
dental home
Question 34: What radiographs interval do you take for a low risk patient?
Answer: every 12-24 months (primary dentition, transitional dentistion) every 18-36 months (adolescent
with permanent dentition) every 24-36 months (adult)
Page 4
Question 1: Fl content in milk and soy based formulas?
Answer: Milk 0.15ppm Soy 0.21ppm
Question 2: How does SDF work? Mechanism?
Answer: Ca5(PO4)3(OH) + SDF = CaF2 (calcium fluoride) and Ag3PO4 (silver phosphate) = CaF2 forms
Ca5(PO4)3F (fluorapatite) Hydroxyapatite turns into fluorapatite. It is believed that silver turns into silver
chloride and oxidized silver is what turns the cavity black. Silver is not able to enter human cells but
bacteria only -- Disturbs cells wall, disrupts DNA replication, and disrupts metabolism
Question 3: Therapeutic dose of Xylitol? Side-effects? Mechanism?
Answer: 4 to 15 grams per day; abdominal distress and diarrhea; sugar substitute that is not metabolized by
bacteria (DOES NOT REDUCE CARIES PER EVIDENCE)
Question 4: Definition of ECC and S-ECC
Answer: ECC = DMF under six and S-ECC = smooth surface caries in three to five; 4 DMF at three, 5 DMF
at four, 6 DMF at five
Question 5: Juice recommendations
Answer: No more than 4-6oz of juice for children 1-6 yrs; no juice under one
Question 6: Amount of toothpaste for children; how many ppm of fl in toothpaste
Answer: Under 3 years old = rice size (0.1mg) 3-6 years old = pea size (0.25mg) Toothpaste 1000PPM
Question 7: How much added sugar is recommended for kids 4-8?
Answer: Less than 16g per day (10% of total energy intake)
Question 9: Recommendation for child's first visit?
Answer: No later than 12 months of age
Question 10: When should a decision on 3rd molars be made?
Answer: Before the 3rd decade (before 20)
Page 1
,Question 11: SNA (82); describe values and meanings
Answer: HORIZONTAL POSITION OF MAXILLA >85 means protrusive/prognathic MAXILLA <79
means deficient/retrognathic MAXILLA
Question 12: SNB (79); describe values and meanings
Answer: HORIZONTAL POSITION OF MANDIBLE >82 means protrusive/prognathic MANDIBLE <76
means retrognathic/retrusive MANDIBLE
Question 13: ANB (3); describe values and meanings
Answer: RELATIONSHIP BETWEEN MAX and MAND + value = class I or class II - value = class III >5
means class II jaw relationship, prognathic max or retrognathic mand <1 means class III jaw relationship,
deficient max or prognathic mand
Question 14: Wits Analysis (0 to -1mm); describe values and meanings
Answer: AP RELATIONSHIP BETWEEN MAX and MAND - value = AO behind BO behind; class III
relationship + value = AO in front of BO; class I or II relationship larger the value, the larger the
discrepancy
Question 15: Facial Angle (88); describe value and meaning
Answer: FH (Por to Orbit) and Nasion-Pognion; measures protrusiveness of mandible; larger the value the
more protrusive or prominent the chin
Question 16: Frankfort Mandibular Plane (24); describe value and meaning
Answer: DIRECTION OF GROWTH The higher the angle, the more vertical the growth direction, the more
complicated the treatment; DIVERGENT SKELETAL GROWTH PATTERN
Question 17: Y Axis - SN (3); describe value and meaning
Answer: MANDIBULAR GROWTH DIRECTION Large value = downward and vertical growth pattern
Small value = horizontal and anterior growth pattern Class II; div 1 = average to high value Class II; div 2 =
smaller y axis As mand plane and y-axis increase, chin prominence decrease
Question 18: U1 to SN (103)
Answer: INCLINATION OF THE CENTRAL INCISOR Large angle = proclination or labioversion of
incisors as seen in class II div 1 Small angle = retroclination or lingually inclined as seen in class II div 2
Question 19: L1 to MP (90) or IMPA
Answer: The greater the angle, the more LABIALLY inclined the lower incisor
Page 2
,Question 20: U1 to L1 (135)
Answer: INTERINCISOR ANGLE Smaller angle = labially inclined incisors like in class II div 1 Greater
angle = upright or retroclined incisors like in class II div 2
Question 21: Presented with 3 EOE images; describe the categories that you would discuss
Answer: OVERALL Profile: Straight, Convex, Concave Profile Type: Dolicocephalic, Brachiocephaic,
Mesiocephalic Facial Symmetry: Symmetrical, Not Symmetrical MULTIPLE VIEWS Midlines: Facial and
maxillary Nasolabial Angle: Obtuse, Acute (Normal 80-120) Lip Posture: Competence? Gingival Display:
Absent, Excessive Smile Arc/Line: Symmetric, Follows lower lip, Canted Chin Point: Prominent
Question 22: Presented with an intraoral photo; describe the categories you would discuss
Answer: Soft tissues: Gingival health, any signs of injury, pathology, abscess Hard tissues: Name dentition,
teeth visible, finding for each tooth including caries Give Caries Risk Assessment
Question 23: Presented with intraoral series: describe the categories you would discuss
Answer: Dentition: Primary, Mixed, Permanent Occlusion: Class? Arch Shape or Form Alignment and
Spacing Dental Relationship: OJ, OB
Question 24: Name components of Dental History, Medical History, Social History, Family History
Answer: Dental History = CC, Past Dental History (dental home, first visit) Medical History = HI-ROAD
(Hospitalizations, Illnesses, Review of Systems, Operations, Allergies, Drugs, Vaccinations; Diagnoses,
Medications, Allergies, Immunizations, History of Sx, Review of Systems Social History = Who lives/cares
for patient, community of residence, diet (CARIES RISK ASSESSMENT) Family History = History of
illnesses
Question 25: Components of Informed Consent
Answer: 1. Legal name and DOB 2. Legal name and relationship to patient 3. Patient's diagnosis 4. Nature
and purpose of the proposed treatment 5. Benefits and risks of treatment 6. Alternative treatment 7. Place
that indicates all questions have been answered 8. Places for signatures of the guardian, dentist, and staff
member as witness
Question 26: Components of a comp oral exam
Answer: General health/growth Pain EOE TMJ IOE Oral hygiene and periodontal health Hard tissues
Developing occlusion Habits Caries risk Behavior Anticipatory guidance
Page 3
, Question 27: Recommendations for 6 - 12 months; 12 - 24 months; 2-6 years; 6-12 years; 12 years older
Answer: ALL OF THEM Clinical oral exam Growth and development CRA Radiographs Prophy and
topical fl Fl supplementation (formula, fluoridated toothpaste) Anticipatory guidance counseling: Oral
hygiene counseling Dietary counseling (including feeding practices - bottle usage and breastfeeding, juice
recommendations, frequency of snacks and sweetened beverages) Injury prevention (play objects, car seats,
electrical cords, athletic mouthguards) Non nutritive habits (digit, pacifiers, bruxism, tongue thrust swallow,
self-mutilating behavior) 6 months - 6 years Speech language development Developmental milestones and
referral to appropriate therapeutic serves 2 years + Assessment of occlusion Sealants 6 years + Substance
abuse counseling (e-cigarettes, smokeless tobacco, alcohol) Piercings (complications include infection,
tooth fracture, edema, airway obstruction) 12 years + Transition to adult care
Question 28: When do you recommend to stop pacifier or thumb-sucking? Other anticipatory guidance
for pacifier?
Answer: By age 3 years or younger or the establishment of terminal planes of occlusion; do not tie to baby
or crib due to strangulation hazard; using past 6 months can cause increase in ear infections
Question 29: High caries risk factors for 0-5
Answer: Mother or primary caregiver has caries, low SES, greater than 3 between meal cariogenic snacks or
beverages, child put to bed with bottle More than 1 DMFS, active white spot lesions, elevated strep mutans
Question 30: Moderate caries risk factors for 0-5
Answer: Special needs, recent immigrant, plaque on teeth
Question 31: High caries risk factors for 6+
Answer: Low SES, greater than 3 between meal cariogenic snacks or beverages More than 1 interproximal
lesion, active white spot lesions, low salivary flow
Question 32: Moderate caries risk factors for 6+
Answer: Special health care needs, recent immigrant, defective restorations, wearing intraoral appliance
Question 33: CRA protective factors
Answer: Fl supplementation or water, teeth brushed daily with fl toothpaste, topical fl from professional,
dental home
Question 34: What radiographs interval do you take for a low risk patient?
Answer: every 12-24 months (primary dentition, transitional dentistion) every 18-36 months (adolescent
with permanent dentition) every 24-36 months (adult)
Page 4
