Prognosis handout

Question 1

Definition of prognosis

Answer 1

A prediction as to the progress, course, and outcome of a disease.

Question 2

Importance of prognosis to the pt

Answer 2

Will I lose my teeth?
Will your treatment help me?
Is it worth the investment of my time and money?

Question 3

Importance of prognosis to the doc

Answer 3

Determines how treatment modalities and resources are utilized
Keeps the patient’s expectations realistic
Accurate prognosis has a financial impact on the therapist

Question 4

Types of prognosis

Answer 4

Diagnostic, Therapeutic, prosthetic

We use therapeutic

Question 5

Diagnostic Prognosis

Answer 5

Definition - an evaluation of the course of disease without treatment

Question 6

Loe Et Al 78

Answer 6

Untreated disease study
480 Sri Lankan males over 8 years
.1-.3 tooth loss/pt/yr

81% mod progressed
11% no progress
8% rapid progress

Question 7

Becker et al 79

Answer 7

Untreated disease study
30 Mod to severe periodontal pos over 3.7 years
.36 tooth loss/pt/yr

Question 8

Therapeutic prognosis Def

Answer 8

an evaluation of the course of disease with treatment

Question 9

Hirschfeld & Wasserman (1978)

Answer 9

Treated periodontal/maint study following 600 pts over 22 years
well maintained lost .03teeth/pt/yr
Downhill .26
Extreme Downhill .61

Question 10

McFall 82

Answer 10

Treated periodontal/maint study following 100 pts over 19 yrs
WM .04 tL/pt/year
D .35
ED .76

Question 11

conclusions about periodontal tooth loss and tx

Answer 11

Most periodontal tooth loss is experienced by a small percentage of the population and the great proportion of patients can be maintained with intact dentitions in the long run. The problem is predicting which patient will fall into which prognostic category.

Question 12

Prosthetic prognosis

Answer 12

the forecast for success of the prosthodontic restoration given the anticipated results of the periodontal treatment, and the periodontal health status obtained.

Question 13

Antes Law

Answer 13

the combined root surface attachment area of the abutment teeth should be equal to or greater than the root surface attachment area of the tooth or teeth to be replaced.

Question 14

Is Antes law valid

Answer 14

Nyman & Lindhe (1979)
332 FPDs in patient with meticulous OH
3-6 Maint.
FDPs had no attachment loss or bone loss despite only 8% meeting antes law