Physiological And Pathological Changrs

Question 1

What’s Fenestrations??

Answer 1

isolated areas in which the root surface is covered only by the periosteum and gingiva,
but, the marginal bone remains intact

More circular pattern

Question 2

What’s dehiscence ?

Answer 2

When the marginal bone participate in the defect start from Mose coronal part .

Question 3

What’s internal remodeling ?

Answer 3

resorption and formation of bone .

Question 4

What’s local and systemic factors of remodelling ?

Answer 4

**Local factors –
1. functional requirements on the tooth
2. age-related changes in bone cells

**Systemic factors –
1. hormonal (e.g., parathyroid hormone, calcitonin),
2. vitamin D3)

Question 5

In which parts bone resorp and deposit ?

Answer 5

Resorbed - side of pressure
Deposits - side of tension.

Question 6

In physiological migration of teeth what is resorption and deposit parts ?

Answer 6

Teeth tend to move medically .
Bone resorption along the mesial surfaces of the teeth
Bone deposition-on the distal surfaces

Question 7

What’s is cementum ?

Answer 7

calcified avascular mesenchymal tissue that forms the outer covering of the anatomic root.

It provides anchorage mainly to the principal fibers of periodontal ligament.

Question 8

What’s cementum types ?

Answer 8

1. Acellular cementum/ primary cementum
2. Cellular cementum/secondary cementum

Question 9

In which types of cementum collages fibers are organized ?

Answer 9

Acellular

Question 10

Which type of cementum forms after bone eruptions ?

Answer 10

Cellular

Acellular during tooth formation

Question 11

Which type of cement seen coronally and apically ?

Answer 11

Coronal - acellular
Apical - cellular

Question 12

Why it’s cellular ?

Answer 12

Contain cementocytes

Question 13

Which one its deposition is rapid ?

Answer 13

Cellular

Question 14

Where does cementum deposition is more rapid ?

Answer 14

Apical part of tooth

Question 15

In which side cementum is thicker ?

Answer 15

Distal surface

Question 16

What’s cement hyperplasia ?

Answer 16

Hypercementosis local or generalized .

Question 17

What’s the etiology of local deposition and general ?

Answer 17

***Local , result of excessive tension fromorthodontic appliance or occlusal forces.
Trauma

***The generalized type:;
1. teeth without antagonists,
2. in teeth with chronic pulpal and periapical infections.

Question 18

What’s CEJ types ?

Answer 18

1. the cementum overlaps the enamel, (60-65 cases)
2. end-to end relationship of enamel(30% cases) but joint
3. cementum and enamel fail to meet.(5-10%) cement defiency

Question 19

Cemental resorption may be caused by which factors ?

Answer 19

**local,- trauma from occlusion, orthodontic
tooth movement, pressure from erupting teeth, cysts and tumors, teeth without functional antagonist, periapical disease and periodontal disease

**systemic – calcium deficiency, hypothyroidism

**idiopathic factors.

Question 20

How root Carie’s develop ?

Answer 20

Cementum -covered by alveolar bone and gingiva.
&raquo_space;»> In cases of gingival recession and loss of
attachment &raquo_space;»>cementum exposed to the oral environment.
»»bacteria penetrate -. Caries of the cementum (root caries) develops.