Lesson 3

Question 1

→ increase masticatory efficiency
→ preservation of supporting tissues
→ retain remaining teeth
→ achieve esthetics

Answer 1

OBJECTIVES FOR TREATMENT PLANNING

Question 2

→ process used to identify an existing abnormal condition
→ determine its cause
→ investigate the abnormality

Answer 2

DIAGNOSIS

Question 3

→ allergic manifestation either to drugs or foods
o drugs such as mercury, iodine, local anesthetics, penicillin
and other antibiotics
→ patient should be asked if under physician care
→ determine the drugs being administered
→ information about periodontal disease, malocclusion, or other
facial or dental deformities in the family, dental experiences,
and recent therapy should be complete in the dental history
→ causes of loss of tooth and complications following extractions or
other dental measures should be learned

Answer 3

MEDICAL HISTORY

Question 4

EXTRAORAL OBSERVATION:

should be palpated to disclose whether movements are smooth and free from jerky or spastic action and reveal the presence of swelling or tenderness

Answer 4

TMJ

Question 5

EXTRAORAL OBSERVATION:

should be observed for possible variations in color, texture, pigmentation, eruption, or lesions that would suggest local or systemic disease

Answer 5

Skin on the Face and Neck

Question 6

EXTRAORAL OBSERVATION:

should be palpated for the presence of lymphadenopathy or glandular enlargement

Answer 6

Neck

Question 7

True or false

It is always advisable to test the vitality of the pulp in the remaining teeth because this may show that a tooth that is necessary in the remaining design of the proposed prosthesis is nonvital.

Answer 7

True

Question 8

→ checked through:
o low voltage pulp testers o hot and cold stimuli

Answer 8

PULP VITALITY

Question 9

RADIOGRAPHIC EXAMINATIONS

Answer 9

→ panoramic
→ lateral cephalometric
→ periapical x-ray
→ bitewing

Question 10

INTRAORAL EXAMINATION:

signs of early malignant neoplastic disease or precancerous lesions

Answer 10

Lips

Question 11

INTRAORAL EXAMINATION:

anemia, leukemia, polycythemia

Answer 11

Gingiva

Question 12

INTRAORAL EXAMINATION:

carcinoma, tuberculosis, syphilis, pernicious anemia, herpes, glossitis of vitamin deficiencies

Answer 12

Tongue

Question 13

INTRAORAL EXAMINATION:

variety of pathologic conditions

Answer 13

Palate

Question 14

INTRAORAL EXAMINATION:

lesions that are cystic

Answer 14

Floor of the Mouth

Question 15

INTRAORAL EXAMINATION:

site of both local and systemic disease

Answer 15

Pharynx

Question 16

→ properly distributed and healthy teeth exist to serve as the abutments
→ capable of sustaining additional load
→ FPD is preferred to a RPD

Answer 16

INDICATIONS FOR FIXED PROSTHESIS

Question 17

→ teeth must have adequate occluso-cervical crown length
→ sufficient retention
→ teeth with short clinical crowns often do not provide satisfactory
retention

Answer 17

CROWN LENGTH

Question 18

→ some teeth have tapered crown form which interferes with the preparation parallelism, necessitating full coverage retainers to improve their retentive and esthetic qualities

→ some incisors possess very thin, highly translucent incisal edges
→ ex.: peg laterals

Answer 18

CROWN FORM

Question 19

fractured or carious teeth that are not restorable and should be removed, thereby creating the need for a prosthesis or alterings its original design

Answer 19

DEGREE OF MUTILATION

Question 20

the distance between abutment teeth affects the feasibility of placing a fixed prosthesis

Answer 20

SPAN LENGTH

Question 21

loss of three adjacent teeth requires careful evaluation of other factors such as:
o root length
o mobility
o crown-root ratio
o periodontal health o occlusion

Answer 21

SPAN LENGTH

Question 22

→ must retain stability for the prosthesis to function normally and to preserve the health of the mouth
o stability requires anchorage in an amount of adequate
bone
→ multirooted teeth provide greater stability than single rooted
teeth

Answer 22

ROOT LENGTH AND FORM

Question 23

inadequate periodontal health results in bone loss that alters suitability of a tooth to support a fixed prosthesis

Answer 23

PERIODONTAL HEALTH

Question 24

the tooth length projecting out of the alveolar bone and the length embedded in bone has traditionally been used as a guideline in determining the suitability of a tooth as an abutment

Answer 24

CROWN-ROOT RATIO

Question 25

True or false the lower the ratio, the less likely the tooth will be able to withstand additional occlusal forces

Answer 25

False the higher the ratio, the less likely the tooth will be able to withstand additional occlusal forces

Question 26

ratio is considered satisfactory

Answer 26

1 : 1.5

Question 27

ratio is considered minimal

Answer 27

1 : 1

Question 28

→ evaluation of abutment support → combined periodontal ligament area of the abutment teeth should be equal or exceed that of the tooth or teeth to be replaced

Answer 28

ANTE’S LAW

Question 29

tooth is mobile within the alveolus to approximately 0.1-0.2 mm in a horizontal direction

Answer 29

Degree 0

Question 30

increased mobility of the crown of the tooth to at the most 3 mm horizontal direction

Answer 30

Degree 1

Question 31

increased mobility of the tooth exceeding 1 mm in a horizontal direction

Answer 31

Degree 2

Question 32

increased mobility of the tooth exceeding 1 mm in horizontal

Answer 32

Degree 3

Question 33

severe mobility of the crown of the tooth both into horizontal and vertical directions which influences the function of the tooth

Answer 33

Degree 4

Question 34

the crowns of proposed abutments must be well aligned so that retentive preparations can be developed

Answer 34

AXIAL ALIGNMENT

Question 35

malalignment of abutment teeth can be so severe that it prevents placement of a fixed prosthesis without devitalization of the teeth or orthodontic movement to correct the malalignment

Answer 35

AXIAL ALIGNMENT

Question 36

a curvature in the arches often places pontics facially to a straight line (fulcrum line) drawn between the teeth immediately adjacent to the edentulous area

Answer 36

ARCH FORM

Question 37

for retention, extend at least far behind the fulcrum line

Answer 37

ARCH FORM

Question 38

excessive occlusal forces can cause loosening of the prosthesis through flexure or can induce fracture when ceramic component is present

Answer 38

OCCLUSION

Question 39

abutment tooth with poor pulpal health should receive root canal treatment prior to preparation

Answer 39

PULPAL HEALTH