Orthodontic arch wire evaluation method based on point pair interval

The invention discloses an orthodontic arch wire evaluation method based on a point pair interval, and relates to the field of orthodontic arch wire bending evaluation. When a theoretical orthodontic arch wire curve space curve and an actual orthodontic arch wire space curve are projected to a plane and converted into a main plane theoretical orthodontic arch wire curve, a main plane actual orthodontic arch wire curve, an auxiliary plane theoretical orthodontic arch wire curve and an auxiliary plane actual orthodontic arch wire curve for evaluation; the method comprises the following steps: firstly, judging the point position error of a bending point, judging the type of an interval of a point pair, determining the number of node straight lines of the interval of the point pair according to the density of unit bending points, and further judging the node position error of a main plane actual orthodontic arch wire curve; and finally, the point pose error of the actual orthodontic arch wire curve of the seconda