Ortho final- Tooth and Jaw Movement

True or false:

Adult skeletal discrepancies are more difficult to change as growth is finished-functional appliances may not be as effective therefore removal of teeth and orthognathic surgery are used more often to align skeletal discrepancies

• true

• false

What is involved with the attachment apparatus of a tooth ?

(Select all that apply)

• Cementum

• PDL

• Lamina Dura

• Enamel

• Dentin

What is like an elastic band-connects cementum of the root to lamina dura of alveolar bone

• Cementum

• Dentin

• Periodontal Ligament

• lamina dura

Source for proliferating cellular elements when stimulated by pressure(compression) or tension (stretching) of __

• PDL

• Cementum

• Lamina Dura

• Alveolar bone

Absence of periodontal ligament when tooth is fused to bone is called ?

• Perylosis

• Enkylosis

• Ankyplyosis

• Ankylosis

Cells contained in thr PDL are:

• Undifferentiated mesenchymal cells

• Fibroblasts and Fibroclasts

• Osteoclasts and osteoblasts

• cementobalsts and cementoclasts

The maxilla has thin outer cortices and spongy (cancellous)bone inside forming a network of trabeculae, and the mandible typically has thicker cortices

• Both statements are true

• Both statements are false

• first statement is true, second statement is false

• first statement is false, second statement is true

Differences between bone in maxilla and mandible allow for more rapid orthodontic movement in the ___

• Maxilla

• Mandible

What Is the name of the theory being explained below?

an electric charge is produced when a mechanical stress is applied (the PDL is compressed or stretched) -electrical  signals are created by bending the alveolar bone which then stimulates a cellular response

• Pressure/tension theory:

• Piezoelectric theory

What is the name of the theory being explained below ?

release of chemical mediators in response to altered blood flow due to compression or stretching of PDL

• Piezoelectric theory

• Pressure/tension theory