Measurements Tab

Use the Measurements tab to view a snapshot of key measurements of the 3D model in the main window.

Bolton Analysis

The Measurements tab includes a Bolton analysis. The sum of the mesial-distal tooth measurements is listed from the first molars (6-6) and from the canines (3-3).The Bolton Ratio, expressed as a percentage, is calculated for both the first molars (6-6) and the canines (3-3) by dividing the Mandible sum by the Maxilla sum.

SureSmile compares the actual measurements to an ideal and lists a surplus amount.

SureSmile uses the "ideal" upper/lower width relation 0.913 with a tolerance +/- 0.0026 for the overall ratio (6-6) and 0.772 with a tolerance +/- 0.0022 for the anterior ratio (3-3). If the Bolton Ratio exceeds this constant value (plus the tolerance) a mandible surplus will be listed. Conversely, if the ratio is less than the constant value (minus the tolerance) a maxilla surplus will be listed. If the ratio is within the tolerance there is no surplus.

Here is an example:

	6…6	3…3	Calculation
Bolton Ratio	92.1	76.6	Mandible sum/Maxilla sum 87.6/95.1 = 92.1% 36.9/48.1 = 76.6%
Maxilla Sum	95.1	48.1	Sum of tooth widths in the Maxilla
Mandible Sum	87.6	36.9	Sum of tooth widths in the Mandible
Mandible Surplus	.8mm		The actual overall ratio is .921 Ideal = 95.1 *0.913 which is 86.8 The surplus is 87.6 - 86.8 = .8
Maxilla Surplus		.4mm	The actual anterior ratio is .766 Ideal = 36.9/ 0.772 which is 47.7 The surplus is 48.1- 47.7 = .4

Arch Length Discrepancy

Positive numbers indicate excess space, and negative numbers indicate inadequate space. These measurements are updated whenever you make changes to the 3D Model.