lOMoARcPSD|70337540
Dental Medicine exams 1
Dental Medicine (Helwan University)
i
i
, lOMoARcPSD|70337540
Final Exam (201)
Faculty of Oral &Dental Medicine
Name: Id: /1/2017
Nahda University
Time allowed: 90min
Biomaterials Department Total Grade: 50 marks
جامعة النهضة Group: 3
كلية طب الفم واألسنان
DBM 2O1
I -Choose the correct answer: [15 marks]
1- All of the following are true about thermoset polymer except ……
a- Irreversible polymer.
b- Set via a chemical reaction.
c- Soften by heat.
d- Used in acrylic denture base.
2- One of the following is required for good adhesion to take place…
a- The adhesive should be applied in viscous state.
b- The adhesive should be in liquid state.
c- The adhesive should produce thick layer.
d- The adhesive should have high surface tension.
3- Generally, the physical, mechanical and chemical properties of any material depend mainly
on …
a- Atomic structure.
b- Inter-atomic bonding.
c- Arrangement of atoms in Space.
d- All of the above.
4- Mercury is considering …
a- Liquid.
b- Metalloid.
c- Metal.
d- None metal.
5- Comparing between denture base materials is done by ……
a- Transverse bending.
b- Indirect tensile test.
c- Impact test.
d- Compression test.
6- The visible electromagnetic radiation is in the range from …… nanometers.
a. 40-70.
b. 400-700.
c. 4000-7000.
d. None of the above.
7- Statement 1: Acrylic denture base materials healthier than metallic denture base.
Statement 2: Metallic filling materials need thermal insulator (base) in deep cavity.
a- Both statements are true.
b- Both statements are false.
c- Only statement 1 is true.
d- Only statement 2 is true.
8- Long span bridge should be constructed of a ……. to allow proper stress distribution.
a- Elastic material.
1
i
Dental Medicine exams 1
Dental Medicine (Helwan University)
i
i
, lOMoARcPSD|70337540
Final Exam (201)
Faculty of Oral &Dental Medicine
Name: Id: /1/2017
Nahda University
Time allowed: 90min
Biomaterials Department Total Grade: 50 marks
جامعة النهضة Group: 3
كلية طب الفم واألسنان
DBM 2O1
I -Choose the correct answer: [15 marks]
1- All of the following are true about thermoset polymer except ……
a- Irreversible polymer.
b- Set via a chemical reaction.
c- Soften by heat.
d- Used in acrylic denture base.
2- One of the following is required for good adhesion to take place…
a- The adhesive should be applied in viscous state.
b- The adhesive should be in liquid state.
c- The adhesive should produce thick layer.
d- The adhesive should have high surface tension.
3- Generally, the physical, mechanical and chemical properties of any material depend mainly
on …
a- Atomic structure.
b- Inter-atomic bonding.
c- Arrangement of atoms in Space.
d- All of the above.
4- Mercury is considering …
a- Liquid.
b- Metalloid.
c- Metal.
d- None metal.
5- Comparing between denture base materials is done by ……
a- Transverse bending.
b- Indirect tensile test.
c- Impact test.
d- Compression test.
6- The visible electromagnetic radiation is in the range from …… nanometers.
a. 40-70.
b. 400-700.
c. 4000-7000.
d. None of the above.
7- Statement 1: Acrylic denture base materials healthier than metallic denture base.
Statement 2: Metallic filling materials need thermal insulator (base) in deep cavity.
a- Both statements are true.
b- Both statements are false.
c- Only statement 1 is true.
d- Only statement 2 is true.
8- Long span bridge should be constructed of a ……. to allow proper stress distribution.
a- Elastic material.
1
i
