Comparative Evaluation of Fixed Functional Cantilever Space Maintainer and Fixed Nonfunctional Space Maintainer: A...

Area of Science:

• Pediatric Dentistry
• Orthodontics
• Biomaterials

Background:

• Early loss of primary molars necessitates space maintainers to prevent mesial drift.
• Fixed nonfunctional (FNF) space maintainers, like the crown and loop, have drawbacks including poor aesthetics and solder loop fracture.
• A novel fixed functional cantilever (FFC) space maintainer using composite resin aims to overcome FNF limitations.

Purpose of the Study:

• To evaluate and compare the longevity and patient acceptance of the FFC space maintainer against the conventional FNF space maintainer.
• To assess complications and failure criteria for both space maintainer designs over a nine-month period.

Main Methods:

• A randomized controlled trial involved 20 children (aged 6-9) with bilateral premature loss of lower deciduous first molars.
• FFC and FNF space maintainers were placed in contralateral quadrants for each child.
• Patient acceptance was measured using a visual analog scale, and complications were monitored at 3, 6, and 9 months.

Main Results:

• Patient acceptability was significantly higher for the FFC space maintainer compared to the FNF type.
• The FNF space maintainer demonstrated a higher longevity rate (85%) than the FFC space maintainer (70%).
• Common FFC failures included crown/pontic fracture and attrition, while FNF failures involved solder joint fracture and cement loss.

Conclusions:

• The fixed functional cantilever (FFC) space maintainer is a viable alternative to conventional fixed nonfunctional (FNF) space maintainers.
• FFC space maintainers offer improved patient acceptance, though longevity requires further investigation.
• Further research is needed to optimize FFC design for enhanced durability.