Dental Problems

Band and Loop Space Maintainer

Dental-HealthSpace management generally refers to the supervision of a kid’s developing teeth and jaws during the growth period from infancy to the adulthood. In this article, there is a brief discussion on the band and loop space maintainer. Let us examine them.

Band and loop space maintainer (fixed, non-functional, passive space maintainer)


The larger tooth, the second deciduous molar, is used for anchorage of the appliance. A loop (.030 inch to 0.035 inch) is soldered to the band and spans the edentulous space to contact the abutment tooth below the contact point. The loop is contoured to rest on the tissue on both sides of the ridge, with an opening in the loop sufficient to permit the eruption of the cusps of the underlying permanent tooth. The loop should contact the mesial abutment at the contact point (Barbar, 1982). If it is constructed below it, the chances of it slipping gingivally are high.


  • The loop can be made only on one side, but it is less stable (Meyers).
  • Sometimes an occlusal rest is given on the tooth. This modification is to overcome the disadvantage of the appliance slipping gingivally. But, this may hamper the proper eruption of the tooth to its occlusal plane (Wright and Kennedy, 1978).
  • Crown -loop: Where abutment requires a crown this appliance may be used. Two techniques can be used which are as follow:
    • Where loop is welded to the crown
    • Where the band is adapted over the crown and the loop is soldered to it.
  • Reverse i.e. Banding the first primary molar for guidance. This appliance has been used in cases where the second molar is lost before the eruption of the first permanent molar (Gellin 1990).
  • A cast crown with a tube on the canine and a cast crown with a bar and post can be cemented on the molar, such that the post fits the tube.
  • Techniques for constructing a functional variant of space maintainer, either by direct or indirect technique have also been described.

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