Orthodontic Aligners: Current Perspectives for the Modern Orthodontic Office ( summary )

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     if you are intersted in this article please follow for more readings https://myorthodonticsblogg.blogspot.com/ In this Article many questions have been answered .. 1- What are the advantages of using orthodontic aligners over traditional braces? 2-How do orthodontic offices incorporate aligners into their treatment plans? 3- what is shape-memory sheet (ClearX)? 4-Are there any limitations or drawbacks to using aligners for orthodontic treatment? Orthodontic aligners have several advantages over traditional braces, including: 1. Aesthetics: Aligners are virtually invisible, making them a popular choice for adults and teenagers who are self-conscious about their appearance. Unlike traditional braces, which use metal brackets and wires, aligners are made of clear plastic and are custom-fitted to the patient's teeth. 2. Comfort: Aligners are made of smooth, comfortable plastic that does not irritate the gums or cheeks. Unlike traditional braces, which can cause discomfort an
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MCQs on Growth & Development in Orthodontics

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1-   


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Regarding functional matrix theory, all of the following is correct except ………

a-   It denies the intrinsic growth potential of the cartilage.

b-   Soft tissue adjacent to the bone is the primary determinant of growth.

c-   Both sutures and synchondrosis are growth sites.

d-   Capsular matrix molds bony ridges.

 

2-   The center of rotation occurs at the premolar area in case of ……

a-   Forward rotation type I.

b-   Forward rotation type II.

c-   forward rotation type III.

d-   Backward rotation type II.

 

3-   The increase in the mandibular intercanine width ceases at an age of …….

a-   6 years.

b-   9 years.

c-   12 years.

d-   15 years.

 

Changes in the rate of growth of a child can be detected using growth charts.

a-   True

b-   False.

 

5-   Embryonic stem cells can be derived from the ………….. stage

a-   Morula

b-   Blastomere

c-   Blastocyst

d-   Trilaminar embryo.



  Trigonocephaly results from the premature closure of ………..

a-   Sagittal suture

b-   Metopic suture

c-   Coronal suture

d-   Lambdoid suture.

 

 Vertical direction of condylar growth leads to backward rotation.

a-   True.

b-   False.

 


4-   Middle cranial base is not used for lateral cephalometric superimposition due to…….

a-   Late closure of the spheno-ethmoidal synchondrosis.

b-   Early closure of the intra-occipital synchondrosis.

c-   Late closure of the spheno-occipital synchondrosis.

d-   Early closure of the spheno-ethmoidal synchondrosis.

 

5-   Post natal growth of the mandible after 7 years occur by…………..

a-   Drift.

b-   Primary displacement.

c-   Secondary displacement.

d-   A & b.

 

6-   The extra synostosis found in crouzon than apert syndrome occurs in the …….. suture.

a-   Coronal suture.

b-   Sagittal suture.

c-   Lambdoid suture.

d-   Metopic suture.

 

7-   Prominent chin occurs with …….

a-   Forward rotation type I.

b-   Forward rotation type II.

c-   Forward rotation type III.

d-   B & c


1-   As the saddle angle becomes more acute, the craniofacial pattern will be more towards ………

a-   Class II high angle.

b-   Class II low angle.

c-   Class III high angle.

d-   Class III low angle.

 

2-   Growth of the mid-face in the anteroposterior direction before 7 years occur mainly by ……

a-   Primary displacement.

b-   Secondary displacement.

c-   Drift.

d-   Remodeling.

 

3-   According to the remodelling theory by Brash, ………

a-   Sutures and caritilage are growth sites.

b-   Sutures and cartilage are growth centers.

c-   Sutures are growth sites and cartilage are growth centers.

d-   Sutures and cartilage have no little or no role.

 

4-   The Human face mostly develops prenataly in the ……….

a-   Zygote period

b-   Embryonic period

c-   Fetal period

d-   All of the above.

1-   Pierre robin syndrome is characterized by all of the following except…….

a-   Cleft lip.

b-   Cleft palate.

c-   Retrognathic mandible.

d-   Glossoptosis.

 

2-   The cranial vault grows in width by bone filling in the ……….

a-   Coronal suture.

b-   Interpareital suture.

c-   Pareito-sphenoidal suture.

d-   B & c.

1-   Obtuse saddle angle will lead to backward rotation of the mandible.

a-   True

b-   False.

2-   Crouzon syndrome is characterized by the following malocclusion features except:

a-   Posterior crossbite.

b-   Openbite.

c-   Class III.

d-   Class II.


1-   Craniometry produces longitudinal data of the same individual while anthropometry only allows cross-sectional data.

a-   true.

b-   False.

 

2-   The safest imaging modality regarding radiation hazards is …..

a-   CT scans

b-   CBCT

c-   Panoramic x-ray

d-   MRI

 

3-   At birth the legs represent about one-third of the total body length, whereas in the adult they represent about half. This obsevation is due to the cephalocaudal gradient phenomenon.

a-   True

b-   False

 

4-   Deep bite is a normal finding at …..

a-   3 years.

b-   6 years

c-   9 years

d-   a & c.


1-   The greatest probability of aquiring a class III molar relation is when the primary second molars are in a ….

a-   Distal step.

b-   Flush terminal plane.

c-   Mesial step.

d-   B & c.

1-   An upper midline diastema should always be treated once diagnosed in the mixed dentition.

a-   True

b-   False

1-   In case of pronounced forward rotation, it is difficult to secure anchorage.

a-   True

b-   False.

 

2-   Tooth movement is more rapid and stable if performed after cessation of growth.

a-   True.

b-   False.

 

3-   The ideal timing for facemask treatment is …..

a-   CS1-CS2

b-   CS3-CS4

c-   CS5-CS6

d-   A & B.

 

4-   The discrepancy between the maxillary and mandibular dentition affects the condylar growth according to …… theory

a-   Van limborg theory.

b-   Latham theory

c-   Servo-system theory

d-   Functional matrix theory.

1-   Loss of posterior teeth which supports the vertical dimension of the face results in ……...

a-   Forward rotation type I.

b-   Forward type II.

c-   Forward rotation type III.

d-   Backward rotation type I.

 

2-   Condylar hyperplasia can be treated by …….

a-   High condylectomy.

b-   Costo-chondral graft.

c-   Distraction osteogenesis.

d-   Mouth opening excercises.

 

3-   The anterior facial height is maintained normal in ………

a-   Forward rotation type I.

b-   Forward rotation type II.

c-   Forward rotation type III.

d-   B & c.

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