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ANAT 3030 NOVEMBER 2012 EXAMINATION
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2 Hours 9/11/2012 EXAMS OFFICE USE ONLY
University of the Witwatersrand, Johannesburg
Course or topic No(s) ANAT 3030
Course or topic name(s)
Paper Number & title
BDS III : ORAL BIOLOGY FOR DENTAL
STUDENTS
Examination to be
Held during month of
NOVEMBER 2012
Year of Study
(Arts & Science leave blank)
THIRD
Degree/Diplomas for which
This course is prescribed
BACHELOR OF DENTAL SURGERY
Faculty/ies presenting
Candidates
FACULTY OF HEALTH SCIENCES
SCHOOL OF ORAL HEALTH SCIENCES
Internal examiner(s)
And telephone extension
Number(s)
DR N MASUMBUKO (011 – 717 – 2208)
(COURSE COORDINATOR)
External examiner(s) DR S MEER
Special materials required
(graph/music/drawing paper)
maps, diagrams, tables,
computer cards, etc.
Time allowance Course Nos. ANAT 3030 Hours TWO
Instructions to candidates
(Examiners may wish to use
this space to indicate, inter alia,
the contribution made by this
examination or test towards the
year mark, if appropriate)
ANSWER ALL QUESTIONS. ONLY SCRIPTS
WRITTEN IN BLUE OR BLACK INK WILL BE
MARKED.
Internal Examiners or Heads of Department are requested to sign the declaration overleaf.
ANAT 3030 NOVEMBER 2012 EXAMINATION
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FACULTY OF HEALTH SCIENCES
SCHOOLS OF ANATOMICAL SCIENCES AND PHYSIOLOGY
ORAL BIOLOGY FOR DENTAL STUDENTS (ANAT 3030)
EXAM: 9 NOVEMBER 2012
TIME = 2 HOURS MARKS = 100
ANSWER ALL QUESTIONS IN THE SPACES PROVIDED
STUDENT NUMBER_________________________________________
FOR MARKERS ONLY
QUESTION ONE / 10
QUESTION TWO / 6
QUESTION THREE / 6
QUESTION FOUR / 7
QUESTION FIVE / 8.5
QUESTION SIX / 10
QUESTION SEVEN / 5.5
QUESTION EIGHT / 10
QUESTION NINE / 37
TOTAL: /100
ANAT 3030 NOVEMBER 2012 EXAMINATION
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SECTION A: ANATOMY
QUESTION ONE
1. Name and give the specific causes of FIVE hereditary disturbances of
mineralization in teeth (10)
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QUESTION TWO
2. Describe in detail, accompanied by diagrams, the epithelio-
mesenchymal interactions, which initiate enamel formation. (6)
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QUESTION THREE
3.1 Define ante-mortem tooth loss and post-mortem tooth loss and briefly
describe the features you would look for when describing ante-mortem
and post-mortem tooth loss in DRY BONE. (3)
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3.2 Describe the anterior-posterior relationship of the maxillary and
mandibular incisors in Angle Class I, II and III occlusions (1.5)
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3.3 With what structures does the tip of the mesiobuccal cusp of the
maxillary first molar align in Angle Class I, II and III occlusions (1.5)
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QUESTION FOUR
4.1 Write note on the vascular supply during dentinogenesis (4)
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4.2 How is intratubular (peritubular) dentin formed? (1)
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4.3 Write notes on tertiary dentin (2)
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QUESTION FIVE
5.1 Differentiate between Intra-parenchymal and extra-parenchymal
innervation and give an example of each. (4)
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5.2 Briefly describe the development of the tongue (4.5)
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QUESTION SIX
6.1 Identify the oral mucosa shown on the photograph. BE SPECIFIC (1)
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6.2 Give three (3) reasons for your answer. (3)
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6.3 Explain in detail the process of maturation of the tissue previously
identified. (6)
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QUESTION SEVEN
In these electron micrographs:
7.1 Identify the structure labelled A. (0.5)
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7.2 Identify the structure labelled B. (0.5)
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7.3 What is the mineral component of structures A and B? (0.5)
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7.4. Name the structure that separates A and B. What is the main
composition of this structure? (2)
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7.5 Name the cells which secrete the structures A and B represented in the
electron micrographs. BE SPECIFIC. (2)
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QUESTION EIGHT
8.1 Describe the structure and functions of the periodontium. (3)
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8.2 Describe the embryonic development of the periodontium. (BE
SPECIFIC). (3)
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8.3 Using a fully labelled diagram, illustrate the different fibres of the
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Periodontal ligament in a multirooted tooth. (4)
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SECTION TOTAL: 63 MARKS
ANAT 3030 NOVEMBER 2012 EXAMINATION
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SECTION B: PHYSIOLOGY
QUESTION NINE
9.1 Give a description of the level of development a tooth has reached at the point when it starts erupting. (3)
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9.4 Explain the changes in saliva composition after administration of atropine. (5)
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(2) ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….... ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….... 9.6 Describe the functions of salivary IgA in the mouth. (4) ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….... ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….... ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….... ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………....
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9.7 Give a biological explanation for each of the following aspects of mastication:
a) the distance that the mandible Hhb drops when opening is not constant for all chewing cycles. b) when chewing a tough substance, the chewing cycles become shorter as the substance softens. c) the most forceful contraction of the mandibular elevator muscles is achieved when the maxillary and mandibular molars are a few millimeters apart. d) the maximum masticatory force that an individual can generate is higher on intra-osseus implant supported teeth than on full denture based teeth. (8)
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SECTION TOTAL: 37 MARKS
GRAND TOTAL: 100 MARKS
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