Indications and Types of Palatal Expansion - Maxillary expansion indicated when the width of upper jaw to lower jaw difference is 4 mm or greater - Measurement done from width of outside first molars in upper jaw compared to lower jaw - Rapid palatal expansion used in cleft palate repair - Rapid palatal expansion used to gain room for teeth in patients with moderate crowding in upper jaw - Types of expansion include rapid palatal expansion (RPE), slow expansion, implant-supported expansion, and surgically assisted rapid palatal expansion (SARPE)

Rapid Palatal Expansion (RPE) - RPE achieved by turning a key in the expander - RPE typically remains in patient's mouth for 3-6 months - RPE can be tooth supported, bone supported, or both - RPE relieves posterior crossbite by achieving daily expansion of 0.5mm to 1mm - RPE results in a gap between the two top front teeth, which may require braces - Adjustment to eating and speaking may take a week or two after receiving RPE - Patients turn the expansion screw themselves to widen the expander - Bionator appliance may be an alternative for lower jaw expansion not managed by the patient

Implant-Supported Expansion - Mini-implant assisted rapid palatal expansion (MARPE) applies forces directly to the maxillary bone - MARPE involves placing 2-4 mini-implants in the palatal vault area to anchor the RME appliance - MARPE allows palatal expansion in young adults with fused palatal suture - Surgical assist may be recommended in adults for consistent outcomes - Expansion at the PNS and nasal aperture critical in treating Obstructive sleep apnea

Surgically Assisted Rapid Palatal Expansion (SARPE) - SARPE used when patient's palate halves or intermaxillary suture fuses together - Palatal expander surgically inserted onto mid-palatal suture by oral-maxillofacial surgeon - Orthodontist connects palatal expanders band rings to maxillary molars - SARPE allows expansion in patients with matured palate - Surgical procedure required for SARPE

Definition, Purpose, and Effects of Palatal Expansion - Palatal expansion is a dental procedure that aims to widen the upper jaw. - It is commonly used to correct issues such as crossbite, overcrowding, and narrow arches. - The procedure involves applying pressure to the midpalatal suture to stimulate bone growth. - Palatal expansion can improve breathing, speech, and facial aesthetics. - It is often performed during childhood or adolescence when the bones are still growing. - Palatal expansion techniques include rapid maxillary expansion (RME), surgically assisted rapid maxillary expansion (SARME), distraction osteogenesis maxillary expansion (DOME), endoscopically-assisted surgical expansion (EASE), and implant-supported palatal expansion. - Benefits of palatal expansion include improved breathing, corrected crossbite, improved dental occlusion, enhanced speech articulation, and improved facial aesthetics. - Palatal expansion is most effective when performed during the growth phase, and the success and relapse rates of different techniques have been investigated. - Notable figures in the field of palatal expansion include Charles J. Burstone, Thomas M. Graber, Robert M. Ricketts, David L. Turpin, and Charles H. Tweed.