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Purpose <p>To evaluate the skeletal, dentoalveolar and soft tissue changes in patients treated with the Forsus fatigue resistance device (FRD) appliance in combination with a&#xa0;full slot labially pretorqued mandibular archwire in class&#xa0;II patients and compare it with applying a&#xa0;conventional plain mandibular archwire.</p> Methods <p>The total sample of 31&#xa0;individuals was divided into three groups: group&#xa0;1 (G1) with 11&#xa0;patients (Forsus appliance therapy combined with an 8°&#xa0;labially pretorqued full slot 0.021″ × 0.028″ stainless steel archwire in mandible), G2 with 10&#xa0;patients (Forsus appliance therapy combined with a&#xa0;plain 0.021″ × 0.025″ stainless steel archwire in mandible), and an untreated control group (GC) with 10&#xa0;patients. Lateral cephalograms before placement of the Forsus appliance and at end of class&#xa0;II correction with an average time of 6 ± 2&#xa0;months were analyzed.</p> Results <p>The paired students&#xa0;t test revealed that class&#xa0;I molar relation, overjet and overbite correction were achieved in the G1 and G2 individuals. Both G1 individuals (IMPA: 7.18°; L1-NB: 1.64 mm, 7.73°) and G2 individuals (IMPA: 8.40°; L1-NB: 2.00 mm, 7.70°) exhibited lower incisor proclination. However, there was no statistically significant difference in the lower incisor position in the two treatment groups. N&#xa0;to point A&#xa0;and SNA values decreased in G1, while the Wits value decreased in G2. The post hoc test showed significant changes in incisor inclination, molar position, and overjet between the treated groups and the GC.</p> Conclusion <p>A&#xa0;Forsus appliance combined with a&#xa0;0.022″ × 0.028″ labially pretorqued archwire in the mandibular arch showed favorable improvements that were similar to those with a&#xa0;plain 0.021″ × 0.025″ stainless steel archwire with no significant difference in terms of mandibular incisor position (i.e., proclination) and maxillary point&#xa0;A position. However, a&#xa0;Forsus appliance combined with a&#xa0;0.022″ × 0.028″ labially pretorqued archwire in the mandibular arch showed better distal positioning of maxillary point&#xa0;A , although statistically insignificant.</p>

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Use of full slot labially pretorqued vs. plain mandibular archwires in combination with the Forsus fatigue resistance device in class II malocclusions

  • 期刊论文

  • 发表日期：

    2025年11月4日

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  • Sujala Ganapati Durgekar,
  • Pratyaksha Shetty,
  • Amit Rekhawat,
  • Anup Belludi

摘要

Purpose

To evaluate the skeletal, dentoalveolar and soft tissue changes in patients treated with the Forsus fatigue resistance device (FRD) appliance in combination with a full slot labially pretorqued mandibular archwire in class II patients and compare it with applying a conventional plain mandibular archwire.

Methods

The total sample of 31 individuals was divided into three groups: group 1 (G1) with 11 patients (Forsus appliance therapy combined with an 8° labially pretorqued full slot 0.021″ × 0.028″ stainless steel archwire in mandible), G2 with 10 patients (Forsus appliance therapy combined with a plain 0.021″ × 0.025″ stainless steel archwire in mandible), and an untreated control group (GC) with 10 patients. Lateral cephalograms before placement of the Forsus appliance and at end of class II correction with an average time of 6 ± 2 months were analyzed.

Results

The paired students t test revealed that class I molar relation, overjet and overbite correction were achieved in the G1 and G2 individuals. Both G1 individuals (IMPA: 7.18°; L1-NB: 1.64 mm, 7.73°) and G2 individuals (IMPA: 8.40°; L1-NB: 2.00 mm, 7.70°) exhibited lower incisor proclination. However, there was no statistically significant difference in the lower incisor position in the two treatment groups. N to point A and SNA values decreased in G1, while the Wits value decreased in G2. The post hoc test showed significant changes in incisor inclination, molar position, and overjet between the treated groups and the GC.

Conclusion

A Forsus appliance combined with a 0.022″ × 0.028″ labially pretorqued archwire in the mandibular arch showed favorable improvements that were similar to those with a plain 0.021″ × 0.025″ stainless steel archwire with no significant difference in terms of mandibular incisor position (i.e., proclination) and maxillary point A position. However, a Forsus appliance combined with a 0.022″ × 0.028″ labially pretorqued archwire in the mandibular arch showed better distal positioning of maxillary point A , although statistically insignificant.