Slow Maxillary Expansion

Slow Maxillary Expansion

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Write short note on slow expansion.
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Slow Maxillary Expansion

• Maxillary arch expansion is done at slow rate, i.e. 0.5 to 1 mm/week.
• It is more stable, lesser chances of relapse.
• Forces generated by such procedure is much lower, i.e. 2-4 pounds.
• Slow expansion procedure takes more time, i.e. 2-5 months.
• Slow expansion is also termed dentoalveolar expansion.
• Type of tissue reaction is more physiologic.

Classification of Slow Expansion Appliances

They are classified as:

• Removable slow expansion appliances
  • Expansion plate with jackscrew
  • Coffin springs
  • Removable quad helix.
• Fixed slow expansion appliances
  • W arch appliance
  • Quad helix
  • Expansion screw
  • Fixed appliance.

Slow Expansion Indications

• Relieve crowding in less space discrepancy.
• In posterior dental crossbite in a single or two teeth
• In clef palate patients with destroyed maxilla.
• In constricted maxillary arch.

Slow Expansion Advantages

• Has good physiological response.
• Produce less damage to dentition.
• Leads to skeletal effect in child patients.

Slow Expansion Disadvantages

It causes tipping rather than bodily expansion of teeth.