Gottlieb developed a simple grading scheme for evaluating the outcome following orthodontic therapy. The author is from Boulder, Colorado.
Criteria for orthodontic correction:
(1) Class I molar relationship
(2) Class I cuspid relationship
(3) cusp interdigitation
(8) crowding or spacing
(9) arch form
(10) torque and parallelism
not a problem
total initial score =
= SUM(points for all 10 criteria)
After the orthodontic treatment, the patient is assessed once more, evaluating those items that were a problem in the initial evaluation. (There could be an argument to do all of the criteria, since a treatment could introduce problems).
condition almost corrected
condition half corrected
condition not corrected
post-treatment score =
= SUM(points for status of problems after treatment)
• minimum initial score: 0 (in which case no orthodontic care would be given)
• maximum initial score: 50
• minimum post-treatment score: -10
• maximum post-treatment score: 50
• The maximum post-treatment score for a patient equals the initial score for the patient.
outcome percent =
= (post-treatment score) / (initial score) * 100%
Adequacy of Care
75 – 84.9%
65 – 74.9%
50 – 64.9%
• The original table had overlaps at 65%, 75% and 85%.
• I would imagine that a score > 95% would be considered an excellent outcome.
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