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

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

eISSN:: 2207-7480
Sprache:: Englisch

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Fachgebiete der Zeitschrift:: Medizin, Vorklinische Medizin, Grundlagenmedizin, andere

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

Article Category: research-article

Online veröffentlicht: 28. März 2022

Seitenbereich: 111 - 119

DOI: https://doi.org/10.2478/aoj-2022-0012

© 2022 Farzaneh Ahrari et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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.