Palatal Expansion, RPE, and MARPE
Palatal Expansion, RPE, and MARPE
An Innovative Orthodontic Solution for Better Breathing and Sleep

What Is Palatal Expansion and How Has It Evolved?
Palatal expansion is a time-tested orthodontic technique to widen the upper jaw, creating more space for teeth alignment and improving airflow through the nasal airway. The first palatal expansion device was invented in 1890 and has evolved dramatically since its inception. Older designs are bulky and uncomfortable, often fixed in place for long periods, but modern advancements have transformed this treatment.
Today, we have a variety of custom 3D-printed metal expanders, including Rapid Palatal Expander (RPE), Invisalign Palatal Expanders (IPE), and Miniscrew-Assisted Rapid Palatal Expanders (MARPE). These new appliances are more comfortable, discreet, and highly effective. The RPE and IPE are designed for growing patients as they accelerate the widening of the upper jaw. MARPE is a groundbreaking solution that uses bone anchors to provide enough force to expand the maxilla in adults where natural growth has already ceased. This innovation ensures that patients of all ages can benefit from palatal expansion, whether it’s to correct dental issues or improve breathing and sleep quality.
Palatal Expansion and It's Evolution
Palatal expansion is a time-tested orthodontic technique to widen the upper jaw, creating more space for teeth alignment and improving airflow through the nasal airway. The first palatal expansion device was invented in 1890 and has evolved dramatically since its inception. Older designs are bulky and uncomfortable, often fixed in place for long periods, but modern advancements have transformed this treatment.
Today, we have a variety of custom 3D-printed metal expanders, including Rapid Palatal Expander (RPE), Invisalign Palatal Expanders (IPE), and Miniscrew-Assisted Rapid Palatal Expanders (MARPE). These new appliances are more comfortable, discreet, and highly effective. The RPE and IPE are designed for growing patients as they accelerate the widening of the upper jaw. MARPE is a groundbreaking solution that uses bone anchors to provide enough force to expand the maxilla in adults where natural growth has already ceased. This innovation ensures that patients of all ages can benefit from palatal expansion, whether it’s to correct dental issues or improve breathing and sleep quality.
Understanding the Anatomy: How Palatal Expansion Affects the Nasal Airway

The nasopharynx, or nasal airway, is a fixed space bounded by the nasal septum, nasal floor, and upper maxilla. As we grow, the upper jaw (or maxilla) fuses at the mid-palatal suture after adolescence, making expanding this area more difficult once growth is complete. This bone fusion makes traditional expanders most effective in younger patients, while adults require more advanced interventions like MARPE to achieve the same results.
The impact of palatal expansion studies consistently shows a change in the nasal cavity. Research by Dr. Audrey Yoon and Dr. Stanley Liu has demonstrated that palatal expansion increases the volume of the nasal airway, improving airflow and reducing nasal resistance. One study published in the American Journal of Orthodontics and Dentofacial Orthopedics (2022) demonstrated that palatal expansion can also decrease the size of tonsils in growing children, improving overall airway function and reducing the likelihood of sleep-related breathing disorders like sleep apnea.
Anatomy of Palatal Expansion

The nasopharynx, or nasal airway, is a fixed space bounded by the nasal septum, nasal floor, and upper maxilla. As we grow, the upper jaw (or maxilla) fuses at the mid-palatal suture after adolescence, making expanding this area more difficult once growth is complete. This bone fusion makes traditional expanders most effective in younger patients, while adults require more advanced interventions like MARPE to achieve the same results.
The impact of palatal expansion studies consistently shows a change in the nasal cavity. Research by Dr. Audrey Yoon and Dr. Stanley Liu has demonstrated that palatal expansion increases the volume of the nasal airway, improving airflow and reducing nasal resistance. One study published in the American Journal of Orthodontics and Dentofacial Orthopedics (2022) demonstrated that palatal expansion can also decrease the size of tonsils in growing children, improving overall airway function and reducing the likelihood of sleep-related breathing disorders like sleep apnea.
Palatal Expansion for Growing Patients
For children and adolescents under 14, palatal expansion is highly effective in reshaping the upper jaw while the bones are still growing and malleable. We use custom 3D-printed metal appliances that fit comfortably in the mouth and gradually widen the palate.
As a patient, palatal expansion typically feels like mild pressure as the appliance gently widens the upper jaw. This gradual process allows the body time to adjust as the palate expands. Over a few weeks, the patient or guardian turns a key that activates the expander, creating the desired expansion. Most patients report that while there may be some discomfort or tightness, it subsides after an hour, and the long-term benefits—including improved breathing and a well-aligned smile—are well worth the short adjustment period.
Early palatal expansion has significant benefits: it prevents crowding, reduces crossbites, and, as mentioned earlier, can even help reduce the size of the tonsils by creating more space in the nasal airway. This early intervention ensures more effective and less invasive treatment than options needed in adulthood.
Palatal Expansion for Growing Patients
For children and adolescents under 14, palatal expansion is highly effective in reshaping the upper jaw while the bones are still growing and malleable. We use 3D-printed metal appliances that fit comfortably in the mouth and gradually widen the palate.
As a patient, palatal expansion typically feels like mild pressure as the appliance gently widens the upper jaw. This gradual process allows the body time to adjust as the palate expands. Over a few weeks, the patient or guardian turns a key that activates the expander, creating the desired expansion. Most patients report that while there may be some discomfort or tightness, it subsides after an hour, and the long-term benefits—including improved breathing and a well-aligned smile—are well worth the short adjustment period.
Early palatal expansion has significant benefits: it prevents crowding, reduces crossbites, and, as mentioned earlier, can even help reduce the size of the tonsils by creating more space in the nasal airway. This early intervention ensures more effective and less invasive treatment than options needed in adulthood.
MARPE for Adults: Palatal Expansion for Non-Growing Patients
Once growth stops and the maxillary suture fuses, traditional palatal expansion is no longer possible without a more advanced appliance. Here, the MARPE (Miniscrew-Assisted Rapid Palatal Expander), also known as MSE (Maxillary Skeletal Expander), comes into play. For patients over the age of 14, including adults, MARPE is a revolutionary tool that makes it possible to expand the upper jaw even after growth has ceased.
MARPE uses bone anchors, also known as TADs or Temporary Anchorage Devices, to apply greater force directly to the maxilla, allowing the expansion of the upper jaw by reopening the fused mid palatal suture. This method has proven effective not only for dental alignment but also for improving airway function. For adults struggling with sleep apnea or UARS, MARPE can offer significant relief by increasing the size of the nasal airway, improving airflow, and reducing breathing difficulties during sleep.
Studies show that adult patients who undergo MARPE treatment report improved sleep quality, better breathing, and enhanced overall health. By addressing the underlying anatomical issues contributing to airway resistance, MARPE offers an innovative solution beyond traditional orthodontics.
Palatal Expansion for Non-Growing Patients
Once growth stops and the maxillary suture fuses, traditional palatal expansion is no longer possible without a more advanced appliance. Here, the MARPE (Miniscrew-Assisted Rapid Palatal Expander), also known as MSE (Maxillary Skeletal Expander), comes into play. For patients over the age of 14, including adults, MARPE is a revolutionary tool that makes it possible to expand the upper jaw even after growth has ceased.
MARPE uses bone anchors, also known as TADs or Temporary Anchorage Devices, to apply greater force directly to the maxilla, allowing the expansion of the upper jaw by reopening the fused mid palatal suture. This method has proven effective not only for dental alignment but also for improving airway function. For adults struggling with sleep apnea or UARS, MARPE can offer significant relief by increasing the size of the nasal airway, improving airflow, and reducing breathing difficulties during sleep.
Studies show that adult patients who undergo MARPE treatment report improved sleep quality, better breathing, and enhanced overall health. By addressing the underlying anatomical issues contributing to airway resistance, MARPE offers an innovative solution beyond traditional orthodontics.
Who Is a Candidate for Palatal Expansion?
For Growing Patients (Under 14):
- Palatal expansion is most effective in children and adolescents under 14 years old. Traditional Invisalign Palatal Expander, 3D-printed metal expanders gently widen the upper jaw, creating space for proper tooth alignment and improved nasal breathing.
For Adults and Non-Growing Patients (14 and Older):
- MARPE is the best option for adults and teens whose growth has ceased. With its bone anchors, MARPE provides the necessary force to reopen the fused palatal suture, expanding the upper jaw and increasing nasal airflow for enhanced breathing and sleep.
Who Is a Candidate for Expansion?
For Growing Patients (Under 14):
- Palatal expansion is most effective in children and adolescents under 14 years old. Traditional Invisalign Palatal Expander, 3D-printed metal expanders gently widen the upper jaw, creating space for proper tooth alignment and improved nasal breathing.
For Adults and Non-Growing Patients (14 and Older):
MARPE is the best option for adults and teens whose growth has ceased. With its bone anchors, MARPE provides the necessary force to reopen the fused palatal suture, expanding the upper jaw and increasing nasal airflow for enhanced breathing and sleep.
Why Choose Phillips Family Orthodontics for Palatal Expansion?
Dr. Joseph Phillips combines advanced techniques, state-of-the-art appliances, and a compassionate approach to deliver personalized orthodontic care. With specialized training in airway-aware orthodontics under Dr. Stanley Liu and Dr. Audrey Yoon, Dr. Phillips has the expertise to treat dental alignment and breathing issues, helping patients of all ages achieve better oral and overall health.
Whether you’re seeking palatal expansion for your child or need more advanced treatment like MARPE, Phillips Family Orthodontics will help create healthy, confident smiles while improving your quality of life.
Why Choose Phillips Family Orthodontics
Dr. Joseph Phillips combines advanced techniques, state-of-the-art appliances, and a compassionate approach to deliver personalized orthodontic care. With specialized training in airway-aware orthodontics under Dr. Stanley Liu and Dr. Audrey Yoon, Dr. Phillips has the expertise to treat dental alignment and breathing issues, helping patients of all ages achieve better oral and overall health.
Whether you’re seeking palatal expansion for your child or need more advanced treatment like MARPE, Phillips Family Orthodontics will help create healthy, confident smiles while improving your quality of life.
Start Your Journey to Better Breathing and a Healthier Smile
If you or your child is experiencing breathing issues, sleep problems, or dental crowding, palatal expansion might be the solution you need. Schedule a consultation with Dr. Joseph Phillips at Phillips Family Orthodontics today to learn how our advanced, personalized orthodontic care can improve your health, breathing, and smile.
Start Your Journey to Better Breathing and a Healthier Smile
If you or your child is experiencing breathing issues, sleep problems, or dental crowding, palatal expansion might be the solution you need. Schedule a consultation with Dr. Joseph Phillips at Phillips Family Orthodontics today to learn how our advanced, personalized orthodontic care can improve your health, breathing, and smile.
Jo MollenhauerApril 3, 2025Trustindex verifies that the original source of the review is Google. My family was given a few referral options and after a lot of research it was very clear that Phillips was the way to go. We were a bit anxious before our first consultation, not knowing what to expect exactly, and our son (8) was also nervous. The staff addressed our son directly which made him feel included and more comfortable. Every single step of imaging was explained and he actually enjoyed the process. Putting a plan together felt informational and we learned a lot. Dr. Phillips even gave my son the floor to ask all his own questions that were important to him. Glenda helped us figure out the finances and answered a ton of questions as well, and my family is actually excited for this process now! Armando FloresMarch 29, 2025Trustindex verifies that the original source of the review is Google. Phillips Family Orthodontics has been amazing for my both of my daughters’ orthodontic care! From the moment we walked in, the entire team made us feel welcome and comfortable. The staff is friendly, professional, and always takes the time to explain each step of the process. Dr. Phillips is fantastic—knowledgeable, patient, and truly cares about his patients’ smiles. My daughters have had a great experience, and we’re so happy with the care they receive. I highly recommend Phillips Family Orthodontics to anyone looking for top-notch orthodontic treatment! Julie OntonMarch 11, 2025Trustindex verifies that the original source of the review is Google. Friendly, fun environment. My son loved making a goofy face for the last image. Nice touch! Vicky LiaoFebruary 21, 2025Trustindex verifies that the original source of the review is Google. We had a great experience at Dr. Phillips' office with my son’s expander. The staff is friendly, professional, and made the process easy to understand. So far, everything is going smoothly, and we’re very pleased with the results. Highly recommend their office to anyone looking for quality care and excellent service! Chandrika B ChandrashekarFebruary 19, 2025Trustindex verifies that the original source of the review is Google. Dr Phillips and his team are professional and amazing! Our kid got her braces here, they made sure the process was comfortable and quick. Tony and Kiana were efficient and gentle. Azza AyoutyJanuary 30, 2025Trustindex verifies that the original source of the review is Google. Dr. Phillips & team you are truly the best. Thank your Dr Phillips for your amazing services. The precise first scan, the amazing follow up, the wonderful perfect teeth, and the final retainer were all part of your amazing services. Thank you to your wonderful team who always greeted me with a smile, are highly skilled, and truly care for the patients. I highly recommend Phillips Family Orthodontics to anyone looking for a great orthodontist. Thank you for the smile :) A ChongJanuary 28, 2025Trustindex verifies that the original source of the review is Google. Excellent service and caring staffVerified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

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ENCINITAS
PHONE
(760) 943-7770
ENCINITAS OFFICE
761 Garden View Court #101
Encinitas, CA 92024
OFFICE HOURS
Monday 8:30 am – 5:30 pm
Tuesday 8:30 am – 5:30 pm
Wednesday 8:30 am – 5:30 pm
Thursday 8:30 am – 5:30 pm
Friday – By Appointment
MIRA MESA
PHONE
(858) 578-1822
MIRA MESA OFFICE
10737 Camino Ruiz #210
San Diego, CA 92126
OFFICE HOURS
Monday 8:30 am – 5:30 pm
Tuesday 8:30 am – 5:30 pm
Wednesday 8:30 am – 5:30 pm
Thursday 8:30 am – 5:30 pm
Friday – By Appointment