Many different designs exist for RME, including tissue-borne, tooth-borne, and bone borne, depending on the age, the cooperation of the patient, and indication (10-13).
Tooth-borne acrylic-bonded RME appliances are the most commonly used expansion devices in the orthodontics practice for narrow upper arch corrections owing to their easy and inexpensive laboratory steps, simple, and non-invasive bonding procedure, and successful patient compliance.
Three-dimensional prospective evaluation of tooth-borne and bone-borne surgically assisted rapid maxillary expansion.
Changes after surgically-assisted maxillary expansion (sarme) to the dentoalveolar, palatal and nasal structures by using tooth-borne distraction devices.
Comparison between both groups (Table 3) evidenced statistically significant differences for all variables, except for the IArD, which increased 6.8 mm using the tooth-borne expander, compared to 5.6 mm using the tooth-tissue-borne expander.
A proportionally greater increase of the interapical distance (IApD) was observed in the tooth-borne expander group (0.7:1.0) compared to the tooth-tissue-borne expander group (0.4:1.0) (Table 4, Figure 3).
The Bionator is a tooth-borne
appliance developed in Germany by Wilhelm Balter in the early 1950s.