The diagnostic ability of the Fränkel manoeuvre in detecting mandibular versus maxillary involvement in subjects with a class II discrepancy

Ahrari, Farzaneh; Forouzesh, Azin; Shafaee, Hooman

doi:10.2478/aoj-2022-0012

Figures & Tables

Figure 1.

The improvement of the facial profile in a class II subject, as judged by orthodontists. (A) Lateral view in centric relation, (B) Lateral view after executing the Fränkel manoeuvre.

Figure 2.

The worsening of the facial profile (bi-maxillary protruded appearance) in a class II subject, as judged by orthodontists. (A) Lateral view in centric relation, (B) Lateral view after executing the Fränkel manoeuvre.

The receiver operative characteristics (ROC) curve showing the diagnostic ability of the Fränkel manoeuvre for determining the offending jaw in class II subjects, according to the judgment of general dentists.

The frequency of subjects with an improvement score greater or lower than 9 (cut-off point) in different groups of class II subjects, according to the judgment of general dentists_

Group	Improvement score ≥ 9	Improvement score < 9	Total
Mandibular retrusion	19	7	26
Mandibular retrusion plus maxillary excess	4	7	11
Total	23	14	37

The frequency of subjects with an improvement score greater or lower than 17 (cut-off point) in different groups of class II subjects, according to the judgment of orthodontists_

Group	Improvement score ≥ 17	Improvement score < 17	Total
Mandibular retrusion	22	4	26
Mandibular retrusion plus maxillary excess	2	9	11
Total	24	13	37

The mean and standard deviation (SD) of improvement scores after executing the Fränkel manoeuvre in class II subjects with different etiologies, according to the judgment of general dentists_

Group	Mean	SD
Mandibular retrusion	13.29	10.61
Mandibular retrusion plus maxillary excess	5.28	16.76
Statistical significance	P = 0.046

The mean and standard deviation (SD) of improvement scores after executing the Fränkel manoeuvre in class II subjects with different etiologies, according to the judgment of orthodontists_

Group	Mean	SD
Mandibular retrusion	23.89	9.95
Mandibular retrusion plus maxillary excess	7.16	18.84
Statistical significance	P-value < 0.001

The diagnostic ability of the Fränkel manoeuvre in detecting mandibular versus maxillary involvement in subjects with a class II discrepancy

Figures & Tables

Figure 1.

Figure 2.

Figure 3.

Figure 4.

The frequency of subjects with an improvement score greater or lower than 9 (cut-off point) in different groups of class II subjects, according to the judgment of general dentists_

The frequency of subjects with an improvement score greater or lower than 17 (cut-off point) in different groups of class II subjects, according to the judgment of orthodontists_

The mean and standard deviation (SD) of improvement scores after executing the Fränkel manoeuvre in class II subjects with different etiologies, according to the judgment of general dentists_

The mean and standard deviation (SD) of improvement scores after executing the Fränkel manoeuvre in class II subjects with different etiologies, according to the judgment of orthodontists_

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