Skip Navigation
Menu Search
Johns Hopkins Children’s Center

In This Section      

Center for Orthognathic Surgery

Our experts at the Johns Hopkins Center for Orthognathic Surgery offer comprehensive, multidisciplinary care for patients with dentofacial differences.

Dentofacial differences refer to significant deviations from the proportions of the upper jaw (maxilla) in relation to the lower jaw (mandible). These differences between the jaws impact the relationship of the teeth in the maxilla and the mandible, called occlusion. Those affected may experience difficulty with speech, breathing, swallowing, chewing and self-esteem. Studies have shown that approximately 5% of the population will have a dentofacial difference that requires jaw repositioning surgery, called orthognathic surgery.

Robin Yang, D.D.S., M.D. | Plastic and Reconstructive Surgeon

Dr. Robin Yang is a craniofacial surgeon whose areas of expertise include orthognathic surgery, pediatric oral and maxillofacial pathology, and congenital craniofacial deformities.

Causes of Dentofacial Differences

  1. Craniofacial conditions/syndromes. Some common ones include:
  1. Hereditary factors
  2. Environmental/parafunctional (due to certain habits or narrow airway)
  3. Traumatic injuries
  4. Tumor related

Our Team

The Center for Orthognathic Surgery works closely with specialists from across Johns Hopkins Medicine. In addition to an orthognathic surgeon, an orthodontist plays an important role in the process of orthognathic surgery. For most patients, braces are needed for 1 to 2 years prior to surgery and for several months after surgery to ensure that the top and bottom teeth come together properly after surgery.

Additionally, we collaborate with experts from otolaryngology, sleep medicine, speech pathology, nutrition and anesthesiology. This multidisciplinary team approach ensures every patient receives personalized, comprehensive evaluation and treatment — throughout every step of the process.


  • Jeffery Posnick, D.M.D., M.D.

  • Rae Buckley, P.A.


  • Karen Blevins

  • Kim Seifert, R.N.

Contact Us

Department of Plastic and Reconstructive Surgery
Johns Hopkins Outpatient Center
601 N. Caroline St.
Baltimore, MD 21287

Phone: 443-997-9466
Fax: 410-955-7060

Explore the Children's Center

Find A Pediatric Specialist
Search our experts by specialty, disease, or condition
Health Information
Get the facts on diseases, conditions, tests and procedures