Nance Space Maintainer
Bilateral maxillary bands with TPA and acrylic button. Maximum anchorage.
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Send Your Case →What Is It?
The Nance Space Maintainer combines a transpalatal arch with an anterior acrylic button that contacts the palatal rugae. It provides maximum posterior anchorage for space maintenance after bilateral maxillary primary molar loss.
Components
• Bilateral Molar Bands — On maxillary first permanent molars • Transpalatal Arch — 1.2mm SS wire • Acrylic Button — 8-10mm diameter at anterior palate • Wire Connectors — 0.9mm SS wire from button to TPA
How It Works
The acrylic button pressing against the palatal rugae creates a physical stop that prevents the molars from drifting forward. This provides stronger anchorage than a band-and-loop or lingual arch alone.
Digital Workflow
1. Intraoral scan 2. 3D-print model 3. Fit bands on maxillary first molars 4. Bend TPA (1.2mm) 5. Wax acrylic button at anterior palate — 8-10mm diameter 6. Flask and process button 7. Solder TPA to bands 8. QC: Button position, TPA clearance, band fit
Manufacturing Standard
• TPA Wire: 1.2mm ASTM F899 SS • Connector Wire: 0.9mm ASTM F899 SS • Button: Heat-cured PMMA, 8-10mm, smooth • Bands: Preformed SS • QC: Button contact verification, band adaptation, wire integrity