Proven method for jaw expansion with CAD/CAM printed Hyrax appliance

When to Use a Hyrax Appliance?

The Hyrax appliance is most commonly used for cases involving:

• Constricted maxilla
• Crossbite or open bite
• Lack of space for permanent teeth
• Cleft palate
• Before surgical treatment

This type of appliance may also be utilized in children who experience problems with nasal breathing or suffer from sleep apnea.

Types of Hyrax Appliances

Several variants of the Hyrax appliance exist, which can be categorized based on their design and anchorage:

• Band-supported Hyrax
• Crown-supported Hyrax
• Hybrid Hyrax with mini-implants
• Hyrax with acrylic coverage

The band-supported Hyrax is most frequently used in children. It is anchored to the molar teeth with metal bands, and the adjustment and seating of the screws can cause significant discomfort, and even bleeding.

What Are the Advantages of Using a Hyrax Appliance?

The greatest advantage of Hyrax appliances is their effectiveness. The results of treatment are visible within 2-4 weeks; however, the appliance remains in the mouth for several months to consolidate the therapeutic effects. Hyrax appliances operate in a predictable manner, and the pace of change can be adjusted individually. Typically, the patient turns the screw 1-2 times daily, which expands the appliance by approximately 0.2-0.25 mm.

Patients appreciate the fact that the appliance is invisible externally, and when properly fitted, it generally causes no major issues in daily life. Unfortunately, Hyrax appliances anchored with bands also carry certain negative consequences.

Classic Solutions – Disadvantages and Limitations

Installation Issues

Despite its high effectiveness, both the production and use of the band-supported Hyrax appliance can be problematic. The process of affixing the bands to the teeth requires their separation. This is a rather painful procedure involving the creation of space between adjacent teeth. However, it is necessary to create a small gap around the molar teeth to allow the placement of the bands.

Problems During Use

In addition to the painful installation, usage can also be problematic:

• • A poorly fitted band may cause gum irritation and inflammation
  • Prolonged use can lead to gingival overgrowth
  • A too-tight band may abrade the enamel during placement and removal
  • Bacterial plaque and food debris can accumulate under a loose band

• Poor fit impacts the treatment effectiveness
• The patient may experience constant discomfort, or a poking sensation against the cheek or tongue

Why Choose CAD/CAM Hyrax Appliances?

Today, thanks to the development of 3D technology, it is possible to eliminate most errors associated with improper appliance fit. The use of SLM laser sintering – 3D printing technology ensures that the appliance fits the patient’s oral cavity perfectly, leading to more satisfactory outcomes.

The New Generation of Hyrax Appliances

The new generation of Hyrax appliances are digitally designed and manufactured using 3D printing, for example, utilizing materials from the Italian company Leone. In modern CAD/CAM-made appliances, instead of classic metal bands, an individually fitted, printed base is used that adheres precisely to the tooth surface.

Benefits of Using the Modern CAD/CAM Hyrax

1. Precision and Safety

Thanks to the digital design and ideal fit, the modern Hyrax eliminates most of the problems known from the classic version. A Hyrax made with CAD/CAM technology guarantees:

• Precise operation
• Protection for teeth and tissues
• Forces accurately directed at the palatal suture
• Symmetrical force distribution, minimizing the risk of facial asymmetry

2. Increased Comfort of Use

The 3D-printed Hyrax increases comfort because:

• It is free of sharp edges
• Reduces the risk of abrasions, sores, and irritations in the mouth
• The smooth surface of the base makes it easier to maintain hygiene
• Translates to a lower risk of developing tooth decay

3. Guarantee of Secure Fit

The use of 3D scanning guarantees:

• Perfect fit to the patient’s individual anatomy
• Stable seating – the device does not shift or fall out
• Greater treatment effectiveness

4. Reduced Patient Discomfort

Modern technology ensures that:

• The patient experiences less pain and muscle tension
• Treatment is better tolerated
• Patients are more willing to continue therapy
• Better and more lasting results are achieved

Summary

The classic Hyrax has been a proven and effective solution in orthodontics for years, but its proper fabrication and use require great precision and commitment from both the technician and the patient.

The modern CAD/CAM Hyrax, made with high-quality Leone materials, is the next step in the development of this method. The use of 3D technology ensures:

• Better fit
• Higher wearing comfort
• Significantly reduced risk of complications

For the patient, this means calmer, more predictable treatment and satisfying results.