Separatorresearched

Quick facts

Field	Value
ID	OA-0167
Type	component
Category	component
Fixed/removable	temporary (patient wears 1–2 weeks)
Primary function	create interproximal space for molar band seating
Uses TADs	no

Overview

Separators (spacers) are placed between the contacts of teeth adjacent to molars requiring bands, 1–2 weeks before the banding appointment. The separator slowly forces the teeth apart by a fraction of a millimeter — enough for the molar band to slide over the contact and seat on the molar without trauma or excessive force. Two types are common: elastic separators (small elastic rings stretched and placed interproximally) and metal spring separators (brass or SS wire bent into a spring that wedges between teeth). Patients may experience mild discomfort (soreness) for 2–3 days after placement.

Clinical & technical

Mechanism of action

The elastic or spring separator exerts a continuous gentle force on the adjacent tooth surfaces, slowly displacing the contacts and creating 0.5–1 mm of interproximal space. This space is maintained by the separator until the banding appointment. At the appointment, separators are removed and the molar band is slid over the contact and cemented.

Indications & case selection

Any case requiring molar bands (Herbst, Nance, lingual arch, space maintainer, Hyrax, MARA, etc.); placed 1–2 weeks before banding; all ages.

Contraindications & limitations

Tight contacts may resist separator placement (metal spring separators are preferred for very tight contacts); separator can fall out if the contact is too loose — must be replaced; patient must avoid sticky foods while wearing separators.

Design & fabrication

Components & materials

• Elastic separator: small latex or non-latex ring (~3 mm diameter)
• Metal spring separator: brass wire bent into figure-8 spring
• Placed with separating pliers (elastic) or by hand compression

(spring)

• Removed with a sickle scaler or separating pliers at banding

Lab fabrication notes

Manufactured by orthodontic suppliers. No lab fabrication. Molar bands are lab-fabricated separately.

Common variants & modifications

• Elastic separator — most common; latex or non-latex
• Metal spring separator — preferred for very tight contacts
• Brass wire separator — twisted brass wire (less common today)

Used in

Appliances that incorporate this component. ★ = fabricated by Clear Fusion Lab.

• ★ Rapid palatal expander —

Rapid palatal expander

• ★ Quad Helix — Quad Helix
• ★ Nance holding arch — Nance

holding arch

• ★ Lingual arch — Lingual arch
• ★ Tongue crib — Tongue crib
• ★ Bluegrass appliance —

Bluegrass appliance

• ★ Palatal crib — Palatal crib
• ★ Transpalatal arch — Transpalatal

arch

• ★ Distal jet — Distal jet
• ★ Pendulum appliance — Pendulum

appliance

• ★ Lingual holding arch —

Lingual holding arch

• ★ Band and loop space maintainer — Band and

loop space maintainer

• ★ Bi-Helix expander — Bi-Helix

expander

• ★ ACCO appliance — ACCO appliance
• ★ Celtic appliance — Celtic

appliance

• ★ Pendex appliance — Pendex

appliance

• Herbst appliance — Herbst appliance
• Flip-Lock HERBST — Flip-Lock HERBST

Common variants & modifications

• Elastomeric separator (ring): most common; placed 1 week before

banding; stretches around contact point

• Brass wire separator: 0.025" brass wire threaded through

contact; used when elastomeric cannot be placed

• Spring separator (Kesling): metal coil spring; self-retaining;

used in tight contacts

• Separator + spacer combo: some systems use slightly thicker

elastomers to create extra space before digital scan

• No-separator technique: self-etching primer bonding of molar

tubes directly without bands (increasingly common)

Also known as

• separator (commonname)_
• spacer (alternatename)_
• orthodontic spacer (descriptor)

Sources

• [Orthodontic Separators — Ohlendorf Appliance

Labs](https://ohlendorfappliancelab.com/tongue-thrust-appliance-what-it-is-and-how-it-works/)

Research log

• 2026-06-09 — researched elastic vs spring separator design, banding

preparation protocol.