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Functional improvement such as malocclusion and aesthetic improvement sought simultaneously, Protruding Chin Orthodontics

Mandibular Prognathism Correction Surgery

Mandible prognathism

Mandibular prognathism refers to the protrusion of the lower jaw due to over-development, resulting in outward or downward protrusion. Patients with mandibular prognathism can have aesthetic issues and functional difficulties when chewing or in speech. To correct the functional and aesthetic aspects of mandibular prognathism, surgery is a common treatment option where the over-developed lower jaw is adjusted inwards. One of the most common characteristic observed with mandibular prognathism is malocclusion, where the upper and lower teeth do not properly align, requiring orthognathic surgery. In the cases where occlusion is not affected but only the lower jaw is protruding, genioplasty and contouring surgery can resolve the issues. For the movement of both the upper and lower jaw, orthognathic surgery is performed in collaboration with orthodontics. While the upper jaw is adjusted to correct the bite, the lower jaw is adjusted inwards. Depending on the severity of the patient’s condition, only the lower jaw may be required to be operated through SSRO or IVRO. In the cases where just the tip of the chin is long without malocclusion, genioplasty can shorten the chin, improving the aesthetics.

Methods of correcting mandibular prognathism

Orthognathic Surgery (Two-jaw Surgery)


Orthognathic Surgery (One-jaw Surgery)


Characteristics that may require mandibular prognathism correction surgery

  • Overall long face shape due to excessively long/protruding lower jaw
  • Appearance of lower jaw protrusion due to under-developed upper jaw
  • Protrusion of the lower jaw
  • Malocclusion due to protrusion of the lower jaw
  • Facial asymmetry due to protrusion of the lower jaw

주걱턱 전후사진
  • Before
  • After(after 3 months)
주걱턱 전후사진
  • Before
  • After(after 3 months)

Basic Surgery Information

  • Duration of Surgery: 2-3 hours
    Method of Anesthesia: general anesthesia
  • Period of hospitalization: 2-3 days
    Suture Removal after 2 weeks
  • In-hospital treatment: 4-5 times
    Recovery period: 2 weeks

Post-operative edema, bleeding, inflammation and other side effects vary in each individual. Consult with the postoperative care staff at Zeah if there are concerns or discomfort.

  • 원장사진
  • Zeah Doctor’s Guide

    Dr. Young Ho Kang (Chairman)

Safe surgery requires accurate diagnosis, sufficient consultation
and treatment planning for the most appropriate method.

Orthognathic surgery for the correction of mandibular prognathism requires an acquired sense for facial balance and abundant mastery in skills. When the condition is accompanied by facial asymmetry or malocclusion, a detailed surgical planning by experts in both oral and maxillofacial, and orthodontics are required. Patients requiring one-jaw surgery can have one of two options; SSRO or IVRO, where one method is not more appropriate or better than the other. It would be best to consult a surgeon with profound experience in both treatment methods.

ZEAH Two-jaw Surgery

Safety + safety, sufficient consultation with the operating surgeon/ co-consultation with specialists, simultaneous improvement on aesthetic issues + functional problems/ systematic diagnosis + detailed plan, accurate and precise operation

  • Safety first! Safe operation management system

    Zeah Dental Hospital is equipped with experts and advanced UPS technology that enables uninterrupted surgical procedures during emergency situations. Each operating room consists of defibrillators and emergency kits, along with state-of-the-art monitoring systems that reviews the patient in real time.
  • Specialist collaboration, perfecting the improvements to aesthetic and functional issues

    Zeah Dental Hospital consist of various specialists that collaborate to deliver results. Their expertise in oral and maxillofacial surgery, cosmetic surgery, orthodontics, prosthetics and anaesthetics ensures to improve both aesthetic and functional issues.
  • Sufficient consultation directly with the operating surgeon + reliable surgery

    Dr. Young Ho Kang is a highly experienced orthognathic surgeon that has no records of failure or accident in any of the 4000 surgeries he has performed over the last 15 years. He personally consults each patient to tailor the surgical procedures to deliver the highest level of satisfaction in a functional and aesthetic aspect.
  • Systematic diagnosis, detailed treatment planning and precise operation

    Zeah Dental Hospital deliberately carries out a comprehensive examination
    prior to surgery for safety purposes and to ensure accurate results.
    The examinations include blood and disease tests plus CT and cephalon x-rays. Preliminary simulation of the surgical procedure is done, comparing the actual face and ideal facial shape based on the dental model and pictures of the oral cavity to maximize desired results.