What are Forsus Fatigue Resistant Springs and their common clinical role?

What are Forsus Fatigue Resistant Springs and their common clinical role?

• A. Interdental elastics anchored to molars for Class II correction.
• B. Removable aligners using bite blocks for space closure.
• C. Fixed intermaxillary springs attached to the archwires that distalize maxillary molars and encourage mandibular advancement for Class II correction.
• D. Temporary anchorage devices attached to implants to retract canines.

Answer: (C)

Forsus Fatigue Resistant Springs are fixed intermaxillary springs that connect the upper archwire to the lower archwire, delivering continuous anterior-posterior force without relying on patient cooperation. They act as a fixed functional appliance to correct Class II malocclusion by distalizing the upper molars and encouraging forward mandibular movement, effectively reducing overjet during comprehensive fixed appliance therapy. Because they are bonded into place, they work consistently like elastics but without the need for the patient to remember to wear them. Other options describe removable elastics, removable bite-block systems, or anchor implants, which are different approaches and not Forsus springs.

Forsus Fatigue Resistant Springs are fixed intermaxillary springs that connect the upper archwire to the lower archwire, delivering continuous anterior-posterior force without relying on patient cooperation. They act as a fixed functional appliance to correct Class II malocclusion by distalizing the upper molars and encouraging forward mandibular movement, effectively reducing overjet during comprehensive fixed appliance therapy. Because they are bonded into place, they work consistently like elastics but without the need for the patient to remember to wear them. Other options describe removable elastics, removable bite-block systems, or anchor implants, which are different approaches and not Forsus springs.