Effect of tooth loss

Question 1

List causes of destruction of tooth structure

Answer 1

Causes include
Disease (Dental caries, tooth wear)
Trauma
Congenital (hypoplasia)

Question 2

Sequels of partial loss of teeth

Answer 2

1-premature contact and trauma of occlusion
2-open contact and food impaction
3-pocket formation and tooth sensitivity
4-gingival recession with tooth mobility
5-mesial drifting of adjacent teeth
6-over eruption of the opposing teeth
7-caries
8-tempro-mandibular joint disturbances.

Question 3

Why restore missing tooth structure

Answer 3

1-Restore function (mastication, speech)
2-Improve esthetic
3-Provide comfort
4-Protect remaining tooth structure

Question 4

Completely edentulous patient can be restored with:

Answer 4

1-Conventional complete denture
2-Implant-supported overdenture
3-Implant-suported fixed prosthesis

Question 5

Methods of replacement of missing teeth in partially edentulous patients

Answer 5

1-Removable partial denture (RPD)
a-Acrylic resin RPD
B-Cast RPD
2-Fixed partial denture (FPD)
a-Conventional tooth-supported FPD
b-Resin-bonded tooth supported FPD
c-Implant-supported FPD

Question 6

Factores affecting the selection of the type of prosthesis

Answer 6

1-Span length
2-Span configuration
3-Abutment alignment
4-Abutment condition
5-occlusion
6-Periodontal condition
7-Ridge form
8-General features.

Question 7

Indications of removable partial denture

Answer 7

1-Anterior span longer than 4 incisors
2-Canine and 2 or more missing teeth
3-Short clinical mobile abutment
4-No distal abutment and bilateral edentulous spaces
5-Insufficient and widely divergent abutment alignment
6-Posterior span longer than 2missing teeth
7-Gross tissue loss in residual ridge
8-Advanced age
9-Limited patient finance.

Question 8

Indications of fixed partial denture

Answer 8

1-Posterior span for 2 or less missing teeth
2-4 incisors missing or less
3-Less than 25 degree inclination of abutment can be accommodated by
Preparation modification
4-Good abutment condition and if non vital teeth can be used if there is
sufficient coronal tooth structure.
5-Good alveolar bone support, moderate ridge resorption with no gross
Soft tissue defects.
6-No mobility, favorable root morphology.

Question 9

Indication of resin-bonded bridges

Answer 9

1-Single tooth replacement, possible for 2 teeth anterior, one posterior
2-Abutment mesial and distal to pontic
3-favorable occlusion
4-Defect free abutment
5-Young pt.

Question 10

Indication of implants

Answer 10

1-No distal abutment or long span
2-Single tooth or 2-6 unit span
3-Dense bone
4-Broad flat ridge
5-Occlusal force must be as nearly vertical as possible.