1. What is the chief advantage of a nonfunctional fixed space maintainer;

A. Prevent lateral jaw growth
B. Difficult to fabricate
C. Difficulty in maintaining proper oral hygiene
D. Continued eruption of opposing tooth

Answer:  D

advantages of a nonfunctional fixed space maintainer are:

1) Easy manipulation
2) It does not interfere with eruption of adjacent tooth.
3) The succedaneous permanent teeth are well guided to their positions.
4) They can be used for uncooperative patient from the stand point of loss, breakage or failure to wear the appliance.
5) The jaw growth is not hampered

2. The space maintainer which is contraindicated in a child suffering from sub acute bacterial endocarditis is;

A. Removable
B. Crown and loop
C. Band and loop
D. Distal shoe

Answer:  D

DISTAL SHOE APPLIANCE

• Used when second primary molar requires extraction and first permanent molar has not erupted
• Should be evaluated with radiograph prior to cementation – Length – Position
• Should extend at least 1 mm below the marginal ridge
• Will be replaced with another space maintainer when permanent teeth erupt.
• Contraindications: 1.Patient at risk of developing infective endocarditis ,2. Immunocompromised individuals

3. Space maintainers are usually needed in the;

A. Mandibular primary incisor teeth area
B. Mandibular primary canine teeth area
C. Mandibular primary second molar area
D. Maxillary primary incisor teeth area

Answer:  C

In cases where a second primary molar is lost, space maintenance is crucial to prevent malocclusion. The second primary molar serves to prevent the adjacent first permanent molar from drifting mesially

4. Best space maintainer

A. Band and loop
B. Distal shoe appliance
C. Space regainer
D. None of the above

Answer:  D

• Primary teeth serve as best space maintainers for permanent dentition

5. Contraindication of band and loop space maintainer are all except;

A. High caries susceptibility
B. Single tooth missing in posterior region
C. Moderate to severe space loss
D. Lower anterior crowding

Answer:  B

The main contraindications for loops and bands appliances are active dental caries, overcrowding, marked space loss, space maintenance for anterior teeth, and space maintenance for second molars in transitional dentition.

6. A space maintainer is least indicated for premature loss of a;

A. Primaray maxillary first molar
B. Primary mandibular first molar
C. Primary mandibular central incisor
D. Primary maxillary central incisor

Answer:  D

7. Which of the following is recommended for bilateral premature exfoliation of mandibular canines;

A. Nancy appliance
B. Lingual arch
C. Band and loop
D. Distal shoe appliance

Answer:  B

Lingual Arch Space Maintainer

• Fixed, passive, non functional space maintaining appliance.  Bilateral mandibular appliance.
• Used to control: 1.Antero-posterior tooth movement 2.Arch perimeter distortion
• Indications:

• Bilateral loss of single / multiple 1ry lower molars, after eruption of lower incisors.
• Minor movement of anterior teeth
• Maintenance of leeway space

8. Which of the following does not function as a a space maintainer;

A. Lingual arch
B. Stainless steel crown
C. Class 2 restorations
D. Palatal expander

Answer:  D

9. Which of the following about band and loop space maintainer is incorrect;

A. Most commonly used
B. It is a loop soldered with the stainless steel crown
C. Unilateral fixed appliance used in posterior segments
D. This loop is only limited to maintain the space of one teeth

Answer:  B

10. During mixed dentition stage,which of the following appliance should be used as a space maintainer for missing primary molars in mandibular arch;

A. Passive Lingual arch
B. Nance’s palatal holding device
C. Distal shoe
D. Removable functional space maintainer

Answer:  A