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second semester examination
prosthodontics
3^{rd} grade A
Name:
Group:
<u>Q1) Choose the correct answer</u>
<u>Answer all (20)</u>
1) Single palatal bar :
A) The palatal bar is a wide half oval with thickness in the center
B) The palatal bar is a narrow half oval with thickness in the center
C) The palatal bar is a wide half oval with thinness in the center
D) The palatal bar is a narrow half oval with thinness in the center
E) None of above
2) Anteroposterior palatal bar
A) The anterior bar is flat and positioned anterior 2mm from rugae area
B) The posterior bar is flat and positioned posterior to rugae area
C) The posterior bar is half oval and similar to palatal strap
D) The anterior bar is half oval and positioned posterior to rugae area
E) None of above
3) Palatal plate connector
A) Provide maximum tissue coverage
B) Provide maximum rigidity and support
C) The anterior border must be kept 8 mm from marginal gingiva
D) A and B
E) all of the above
4) The broadest portion of the lingual bar located at
A) superior border
B) anterior border
C) inferior border
D) posterior border
5) In determination the height of floor of mouth by using customized impression tray, this tray away from floor of the mouth about
A) 2mm
B) 3 mm
C) 4mm
D) 5mm
E) None of above
6) The upper bar of double lingual bar should run straight across the lingual surface of the teeth
A) True
B) False
7) Gridwork minor connectors
A) they are placed between two teeth
B) they are adjacent to edentulous space
C) the lattice type is flatter
D) the lattice type provides more retentive potential for acrylic resin
E) B and C
F) B and D
8) The finishing line junction with major connector should take form of angle and this angle are
A) 180-degree
B) 90 degrees
C) more than 90-degree
D) 60 degrees
9) The junction of major connecter with minor connector at palatal finishing line should be located
A) 2mm medial from imaginary line that would contact the lingual surface of missing posterior teeth
B) 2mm lateral from imaginary line that would contact the lingual surface of missing posterior teeth
C) 3mm lateral from imaginary line that would contact the lingual surface of missing posterior teeth
D) 3mm medial from imaginary line that would contact the lingual surface of missing posterior teeth
E) 4mm medial from imaginary line that would contact the lingual surface of missing posterior teeth
10) Upper arch with missing all molars teeth on both side with torus in mandible extended posteriorly, which is best upper major connecter use
A) combination of anteroposterior palatal strap
### [الصفحة الثانية - صورة 47495.jpg]
*(تتمة خيارات السؤال العاشر وباقي الأسئلة)*
B) single palatal strap
C) palatal plate major connecter
D) U shaped major connecter
11) The deepest part of the occlusal rest seat should be located
A) near the marginal ridge
B) near the tip of the cusp
C) near the oblique ridge
D) near the center of mesial or distal fossa
E) none of above
12) Upper arch with missing all molars teeth on both side and all remaining teeth is periodontally weak, which is best upper major connecter use
A) combination of anteroposterior palatal strap
B) single palatal strap
C) palatal plate major connecter
D) U shaped major connecter
13) The angle formed between occlusal rest and vertical minor connector
A) 90-degree
B) more than 90 degrees
C) less than 90-degree
D) none of above
14) Upper arch with missing second premolar and first molar teeth on right side, which is best upper major connecter use *(ملاحظة: توجد كلمة "second" مكتوبة بخط اليد فوق كلمة missing)*
A) combination of anteroposterior palatal strap
B) U shaped major connecter
C) single palatal strap
D) palatal plate major
15) Reciprocal arm of the clasp

A) must be rigid
B) must be flexible
C) give retention
D) give stability
E) B and D
F) A and D
16) Gold clasps are not as flexible or adjustable as wrought wire
A) True
B) False
17) lower arch with missing all molars teeth on both side and there is enough space between lingual marginal gingiva and floor of the mouth, which is best lower major connecter use
A) lingual bar
B) labial bar
C) lingual plate
D) interrupted lingual plate
18) The retentive arm must be designed so that only the clasp terminus engages
A) on the height of contour
B) marginal ridge
C) area above height of contour
D) none of above
19) Extended rest should be extended
A) more than one third of the mesiodistal width
B) more than one half of the mesiodistal width
C) less than one third of the mesiodistal width
D) entire width of the mesiodistal width
E) None of above
20) lower arch with missing all pre molars teeth on both side and there 6mm space between lingual marginal gingiva and floor of the mouth, which is best lower major connecter use
A) labial bar
B) lingual plate
C) lingual bar
D) interrupted lingual plate

فرعA

Q1) Choose the correct answer
Answer all (20)
1) The anteroposterior dimension of single palatal strap
A) should be less than 8mm to avoid compromise of rigidity
B) should be less than 7 mm to avoid compromise of rigidity
C) should be less than 6 mm to avoid compromise of rigidity
D) should be more than 6 mm to avoid compromise of rigidity
E) None of above
2) Combination of anterior posterior palatal strap
A) The anterior palatal strap should be in the farthest anterior position
B) The posterior palatal strap should be located posterior as far as possible and posterior to the junction of hard and soft palate
C) The posterior palatal strap should be located posterior as far as possible and anterior to the junction of hard and soft palate
D) A and c
E) None of above
3) U shaped major connector
A) It is the least desirable of major connector
B) It is good when cross arch stabilization is need
C) Display less resistance to flex
D) all of the above
E) A and C
4) In determination the height of floor of mouth by using periodontal probe
A) Space between lingual gingival tissue and floor of the mouth more than 8 mm to use lingual bar
B) the tip of probe on the lingual gingival tissue
C) Reading should be taken at the most apical portion at the floor of the mouth
D) A and B
E) A and C
5) Double lingual bar
A) secondary bar located above cingulum
B) secondary bar located under cingulum
C) secondary bar located at cingulum
D) the upper and lower component joint by continues metal sheet
E) A and D
6) The labial bar use when there are severely lingual inclined mandibular incisors and pre molars teeth and this lingual inclination corrected by mouth preparation
A) True
B) False
7) Tissue stopper of minor connector
A) it has direct contact with ridge
B) the area of tissue stopper is relief area
C) it provides stability to framework
D) A and C
5) All of above
8) The length of gridwork minor connecter for the maxillary distal extension base should extend posteriorly about
A) one third the length of the edentulous ridge
B) one half the length of the edentulous ridge
C) two third the length of the edentulous ridge
D) entire length of the edentulous ridge
9) The angle formed between occlusal rest and vertical minor connector
A) 90-degree
B) less than 90 degrees
C) more than 90-degree
D) none of above
10) The retentive tip of the clasp
A) must be rigid
B) must be flexible
C) give retention
D) give stability
E) A and C
F) B and C
11) lower arch with missing all molars teeth on left side and there is enough space between lingual marginal gingiva and floor of the mouth, which is best lower major connecter use
A) labial bar
B) interrupted lingual plate
## الصفحة الثانية (47462.jpg)
*(تكملة الاختيارات للسؤال رقم 11 من الصفحة السابقة)*
C) lingual plate
D) lingual bar
12) Upper arch with missing second premolar and first molar teeth on both side, which is best upper major connecter use
A) combination of anteroposterior palatal strap
B) single palatal strap
C) palatal plate major connecter
D) U shaped major connecter
13) Internal finishing line
A) it is metal resin joint
B) it is located on outer surface of major Connecter
C) it is located on tissue surface
D) A and B
E) A and C
14) Upper arch with missing second premolar and first molar teeth on both side with torus palatines extended posteriorly, which is best upper major connecter use
A) combination of anteroposterior palatal strap
B) single palatal strap
C) palatal plate major connecter
D) U shaped major connecter
15) Cast gold alloys may have greater resiliency than doing cast chromium- cobalt alloys
A) True
B) False
16) The clasp arm which is rounded form can be flex in
A) One direction
B) two directions
C) all directions
D) none of above

17) Upper arch with missing all molars teeth on both side with torus in mandible extended posteriorly, which is best upper major connecter use
A) U shaped major connecter
B) single palatal strap
C) palatal plate major connecter
D) combination of anteroposterior palatal strap
18) lingual rest used primarily on
A) maxillary canine
B) mandibular canine
C) maxillary first pre molar
D) mandibular first premolar
E) none of above
19) lower arch with missing canines and all molars' teeth on left side and all remaining teeth is periodontally weak and there is space between anterior teeth, which is best lower major connecter use
A) labial bar
B) interrupted lingual plate
C) lingual plate
D) lingual bar
20) The depth of rest seat at marginal ridge must be lowered to
A) 1.5 mm
B) 2 mm
C) 2.5 mm
D) 3 mm
E) none of above

فرع c
مثل متعرفون امتحانا مد ثاني كان ثلاث نسخ
A,B,C
هاي AوC
بقت الB

1) Circumferential Clasp

الأسماء الثانوية:

Akers clasp
Circle clasp
Suprabulge clasp
Occlusally approaching clasp
Pull clasp

أهم النقاط:

يقترب من الـ undercut من جهة occlusal.
Retentive arm بالـ gingival 1/3.
Reciprocal arm بالـ middle 1/3.
الأفضل لـ Class III و Class IV.
Support → Occlusal rest.
Retention → Retentive tip.
Reciprocation → Reciprocal arm.
Engages >180° من محيط السن.

عيوبه:

يغطي tooth surface أكثر.
Esthetics أقل.
صعب التعديل.

2) Ring Clasp

أهم نقطة:

يلف تقريبًا حول كامل السن.

يستخدم:

Mesiolingual undercut.
Tilted mandibular molar.

لازم:

Supporting strut.

عيوبه:

Hygiene سيئة.
صعب التعديل.

3) Embrasure Clasp

الاسم الثانوي:

Double Akers

أهم النقاط:

لازم Double occlusal rests.
يحتوي:
2 retentive arms
2 reciprocal arms

يستخدم:

إذا ماكو edentulous space بالجهة المقابلة.
Unmodified Class II أو III.

عيوبه:

Interproximal reduction كبير.
يغطي سن أكثر.

4) Back Action Clasp

أهم نقطة:

Modification of Ring clasp.

يستخدم:

Premolar anterior to edentulous space.

ملاحظة:

نادر الاستخدام.

5) Multiple Clasp

أهم نقطة:

Two opposing circumferential clasps.

يستخدم:

Additional retention.
Additional stabilization.

عيبه:

يحتاج Two embrasures.

6) Half-and-Half Clasp

أهم نقطة:

Retentive arm من جهة.
Reciprocal arm من جهة ثانية.

يستخدم:

Unilateral partial denture.

غير مفضل:

Bilateral distal extension.

7) Reverse Action Clasp

الأسماء الثانوية:

Hairpin clasp

يستخدم:

Proximal undercut قريب من edentulous space.
إذا bar clasp ممنوع.

عيوبه:

سيء esthetically.
Difficult fabrication.
Difficult adjustment.

Clasps Designed to Accommodate Distal Extension Movement

تستخدم غالبًا بـ:

Class I
Class II

8) RPI Clasp

الاسم:

RPI

المعنى:

R = Mesial Rest
P = Proximal Plate
I = I-bar

أهم النقاط:

Mesial rest دائمًا.
I-bar بالـ gingival third.
يدخل 0.25 mm undercut.

وظيفته:

يقلل torque على abutment.

9) Bar Clasp

الأسماء الثانوية:

Infrabulge clasp (نوع من bar clasp)

أهم نقطة:

يقترب من undercut من جهة gingival.

أشكاله:

I
T
Y
L
U
S

الأفضل:

I-bar

Contraindications للـ Bar Clasp / RPI

Deep cervical undercut.
Severe tissue undercut.
Shallow vestibule.
High frenum.
Tilted tooth.

10) RPA Clasp

المعنى:

R = Mesial Rest
P = Proximal Plate
A = Akers clasp

الفرق عن RPI:

بدل I-bar يستخدم Akers.

يستخدم:

إذا Bar clasp ممنوع.

11) Infrabulge Clasp

أهم نقطة:

ينطلق من denture base border.

ميزاته:

Flexible.
Esthetic أكثر.
Retention أكثر.
Tipping أقل.

12) Combination Clasp

يتكون من:

Wrought wire retentive arm.
Cast reciprocal arm.

أهم ميزاته:

Flexibility.
Adjustability.
Esthetics أفضل.
Tooth coverage أقل.

يستخدم:

Distal extension cases.
Weak abutment.
إذا نحتاج مرونة عالية.

⸻

أكثر الكيسات تكرارًا

⭐ Kennedy Class III → Akers clasp

⭐ Mesiolingual undercut on tilted mandibular molar → Ring clasp

⭐ No edentulous space available → Embrasure clasp

⭐ Distal extension (Class I / II) → RPI أو RPA

⭐ Shallow vestibule أو tissue undercut يمنع I-bar → RPA

⭐ Need maximum flexibility → Combination clasp

⭐ Most esthetic among cast clasps → Bar clasp / I-bar

⭐ Hairpin = Reverse action clasp

⭐ Double Akers = Embrasure clasp

⭐ Akers = Circumferential clasp = Suprabulge clasp = Occlusally approaching clasp = Pull clasp.

ملخص مهم لكجر ١١ انواع الكلاسبات والاسماء الثانوية والمميزات لكل نوع …

بروس فصل ثاني امسكيو مع الحل

بروس فصل اول امسكيو مع الحل

سؤال 14 فصل اول

CROWN كورس 1

1- the impression material that has long setting time in the mouth (typically 10 minutes) is:
a- Polysulfide impression material
b- Condensation silicone impression material
c- Polyether impression material
d- Addition silicone impression material
2- during construction of provisional crown, Prepare the tooth (or teeth), mix the resin, place it in the over- impression in the area of tooth preparation, and seat the over- impression inside the patient's mouth this technique is called
a- Indirect impression method
b- Direct impression method
c- direct chairside technique
d- b and c
3- Visible Light-Activated (VLA) Composites :
a- no exothermic heat
b- there is a heavy oxygen-inhibited layer
c- no need for a preoperative impression
d- a and c
4- Using a plane retraction cord :
a- chemical retraction
b- mechanical retraction
c- chemo mechanical retraction
d- none of the above
5- for non-traumatic, non-invasive tissue management and excellent hemostasis in the gingival sulcus ,which technique can be used:
a- Chemo-mechanical retraction
b- Electrosurgical
c- expasyl
d- Mechanical
6- starting to inject the light body into the dental arch, beginning with the prepared tooth, and then the tray loaded with the heavy body is inserted inside the patient's mouth and seated over the dental arch, this technique is called:
a- Single mix technique
b- Double mix technique
c- Putty-wash technique
d- monophase technique
7- Setting inhibition of impression material by some brands of latex gloves occur with:
a- polyether
b- polysulfide
c- additional silicone
d- condensation silicone
8- the special tray:
a- It should be rigid enough to resist breakage
b- It should have a thickness of 5 mm
c- It should extend about 2-3 mm cervical to the gingival margin)
c- It should extend about 2-3 mm cervical to the gingival margin
d- All of the above
9- temporary crowns consist of a shell of plastic or metal that could be cemented directly on the prepared tooth following adjustment, or after its lining with a resin material is called:
a- Customized temporary restorations
b- preformed temporary crowns
c- Laboratory-made temporary restorations
d- chairside temporary restorations
10- the impression technique that used for condensation silicones to minimize the effects of dimensional changes during polymerization is called:
a- Single mix technique
b- monophase technique
c- Double mix technique
d- Putty-wash technique

مد اول +مد ثاني
ل مادة CROWN

و الما يِبْايع حِيدرة خَسران دنيا وآخرة