Sample Questions For MFDS

MEMBERSHIP OF THE FACULTY OF DENTAL SURGERY
PART 1
SAMPLE MULTIPLE SHORT ANSWER QUESTIONS
This paper will normally contain up to 12 questions. The duration of the examination is shown in
the relevant version of the Regulations (regulation 3.2).
The candidate guidance and information on the multiple short answer questions given below
should be read in conjunction with the „Guidance to Candidates for Part 1 and Part 2‟ available on
College Websites.
Guidance to candidates
You will be provided with a question paper and a separate blank answer booklet for this paper.
All questions should be attempted. Marks are not deducted for incorrect answers.
Instructions to Candidates
You must begin a new page in the answer booklet for each question (make sure that your
candidate number and the question number are written at the top of each page).
If the question is divided into sections, each part of your answer should be separated by
inserting the appropriate part number (e.g. 1 (a), 1 (b), 1 (c) etc).
It is important to number your answers correctly and clearly as answer booklets may be
separated during the marking process.
You should refer to clinical photographs or radiographs where indicated.
Where indicated, complete your answer on the form provided (e.g. for prescription writing)
Answers can be given in the form of a bullet pointed list.
The sample questions and answers below are provided to give you guidance. The answers
are to be used as typical examples, and are not necessarily full and complete.
Sample Question 1
A 40-year-old woman presents with a painful swelling of the right mandible. A radiograph shows a
large radiolucent area. A biopsy suggests a giant cell lesion which could be isolated, or perhaps a
result of hyperparathyroidism.
a) What other clinical features can be present in primary hyperparathyroidism?
b) What are the radiographic features in primary hyperparathyroidism?
c) What abnormal biochemical results would you expect?
d) What are the main complications of primary hyperparathyroidism?
e) What treatment is indicated for primary hyperparathyroidism?
August 2011 1
Sample Answer Question 1
a) What other clinical features can be present in primary hyperparathyroidism?

Renal stones
Bone pain elsewhere
Polydypsia/polyuria
Peptic ulcer pain
b) What are the radiographic features in primary hyperparathyroidism?

Generalised osteoporosis
Loss of lamina dura
Subperiosteal resorption in fingers and resorption in terminal phalanges
Multiple bone cysts
c) What abnormal biochemical results would you expect?

Calcium raised
Phosphate and alkaline phosphatase may be raised if extensive bone lesions
Hypercalciuria
Parathyroid hormone (PTH) level raised
d) What are the main complications of primary hyperparathyroidism?

Irreversible renal damage
Pathological fracture
e) What treatment is indicated for primary hyperparathyroidism?

Parathyroidectomy
Vitamin D
Sample Question 2
Please read the summary below of the scientific paper entitled: Bonded versus
banded first molar attachments: a randomized controlled clinical trial
(Journal of Orthodontics, 34: 128-136, 2007).
Objective: To compare the clinical failure rates of bonded first molar tubes with
those of cemented bands during fixed appliance therapy.
Design: Prospective randomised controlled trial (RCT)
Setting: Two UK hospital orthodontic clinics
Participants (n=110):
Inclusion criteria: Hospital waiting list patients requiring fixed appliances
Exclusion criteria: Orthognathic cases; patients needing lingual arches and/or
headgear; molars with restorations or enamel defects; relevant medical history.
Method: Patients randomly allocated to two groups. Experimental group patients
(n=55) received single molar tubes (n=181) bonded with a chemically cured
composite resin „X‟ after a 30 second etch. Control group patients (n=55) treated
with bands (n=186) cemented with glass ionomer cement „Y‟. First-time failures
were recorded together with time of failure. All patients were followed to the end or
discontinuation of treatment.
Results: First-time failures: bonds=33.7%; bands=18.8%. Bonded tubes more
likely to fail [Relative Risk = 2.4; 95% Confidence Interval 1.4 to 4.1] compared with
bands.
Conclusion: First molar tubes bonded with composite resin „X‟ showed a
significantly higher first-time failure rate than bands cemented with glass ionomer
cement „Y‟.
August 2011 2
a) In a clinical study, what are the advantages of a randomised control trial
design?
b) Interpret the results presented with regard to the terms “Relative Risk = 2.4”
and “95% Confidence Interval 1.4 to 4.1”.
c) The conclusion comments on the comparison of failure rates in this study

between first molar tubes bonded with composite “X” and bands cemented with
glass-ionomer cement “Y”.
List four factors that may influence or limit the application of these findings
when choosing between bonded and banded attachments in clinical practice.
a) In a clinical study, what are the advantages of a randomised control trial

design?
Randomisation – reduces bias

Control group – comparability to no treatment / gold standard
b) Interpret the results presented with regard to the terms “Relative Risk = 2.4”
and “95% Confidence Interval 1.4 to 4.1”.
Relative risk
o Tubes bonded with composite X are twice as likely to fail
compared to bands cemented with glass ionomer cement
Confidence Interval
o Relatively wide CI
o CI does not overlap 1 – statistically significant
c) The conclusion comments on the comparison of failure rates in this study

between first molar tubes bonded with composite “X” and bands cemented with
glass-ionomer cement “Y”.
List four factors that may influence or limit the application of these findings
when choosing between bonded and banded attachments in clinical practice.
Attachments used
Adhesive used
Socio-economic status / demographic profile of patients
Experience / skill of operator
Length of follow-up period
August 2011 3
Sample Question 3
What are the normal dental and occlusal features that you would expect to find in a 10-year-old
child?
What are the normal dental and occlusal features that you would expect to find in a 10-year-old
child?
Dental features
Teeth erupted
Absence of crowding or spacing
Good alignment
Incisors of average inclination
Cs and Ds may be mobile/exfoliated
May have midline diastema with distally tipped central and lateral incisors as normal
developmental feature due to position of U/E 3s relative to roots of laterals (“ugly
duckling stage”)
Canines palpable buccally
Tooth wear on deciduous teeth
Occlusal features
Incisors class I (normal OJ and OB)
Molars tend to be slightly class II (“flush terminal plane”) due to relatively large size
of lower Es.
No crossbites
August 2011 4

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MEMBERSHIP OF THE FACULTY OF DENTAL SURGERY

SAMPLE MULTIPLE SHORT ANSWER QUESTIONS

a) What other clinical features can be present in primary hyperparathyroidism?

b) What are the radiographic features in primary hyperparathyroidism?

c) What abnormal biochemical results would you expect?

d) What are the main complications of primary hyperparathyroidism?

e) What treatment is indicated for primary hyperparathyroidism?

a) What other clinical features can be present in primary hyperparathyroidism?

b) What are the radiographic features in primary hyperparathyroidism?

c) What abnormal biochemical results would you expect?

d) What are the main complications of primary hyperparathyroidism?

e) What treatment is indicated for primary hyperparathyroidism?

c) The conclusion comments on the comparison of failure rates in this study

Sample Answer Question 2

a) In a clinical study, what are the advantages of a randomised control trial

Randomisation – reduces bias

c) The conclusion comments on the comparison of failure rates in this study

Sample Answer Question 3

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