Mobility and Furcation Flashcards
What is the most widely used method to assess tooth mobility?
The Miller Index (1938).
What scale is used in the Miller Index for tooth mobility?
N, 1, 2, 3 or I, II, III.
What symbol might be added to indicate mobility between numbers?
A plus sign (+).
What is the term for teeth with zero mobility?
Ankylosis (no PDL)
Is the interpretation of the Miller Index objective or subjective?
Subjective, meaning it can be bias
What does āNā indicate on the mobility scale?
Normal physiologic mobility (all teeth with a PDL have normal mobility).
Class I mobility
Slight mobility, greater than normal
Class II mobility
Moderate mobility, greater than 1 mm displacement
Class III Mobility
Severe mobility, moves vertically and is depressible in the tooth socket
What does fremitus mean?
Palpable vibration or movement of a tooth.
What does fremitus refer to?
The vibratory patterns of teeth.
What causes a tooth to have fremitus?
Excess contact, often due to premature contact.
How is fremitus related to tooth mobility?
A tooth with fremitus usually has some degree of mobility.
What type of analysis is the fremitus test used with?
Occlusal analysis and adjustment.
On which teeth is fremitus determination made?
Only on the maxillary teeth.
How is furcation involvement classified?
By the amount of bone destroyed in the furcation area (Glickman grades).
Grade I furcation: early, beginning involvement
Probe can enter the concavity, but bone is still intact
Grade II furcation: moderate involvement
Probe can enter the furcation area between the roots but not completely
Grade III furcation: severe involvement
Probe passes between the roots through the entire furcation
Grade IV furcation:
Same as grade III, Exposure resulting from gingival recession
