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Correction of malocclusion and facial asymmetry by the movement of the lower jaw

Information on treatment and surgery

Orthognathic Surgery (Single-jaw Surgery)

One Jaw Surgery is one type of orthognathic surgery that involves the movement of the lower jaw. This surgery corrects and improve facial asymmetry and abnormality. The lower jaw surgery can be categorized into two types; Sagittal Split Ramus Osteotomy (SSRO) and Intraoral Vertical Ramus Osteotomy (IVRO). SSRO – Division on the back part of the lower jaw bone into two palates, which are adjusted then fastened. IVRO – Vertical division on the back part of the lower jaw bone which are not fastened. Particular methods of one-jaw surgery may not be suitable for everyone; hence the patient’s health and bone structure condition must be considered carefully when choosing between treatment methods.

Who is suitable for single or two-jaw surgery?

Subjects of single-jaw surgery
Single-jaw Surgery Two-jaw Surgery
  • Moderate chin protrusion
  • Short profile due to chin depression
  • Big or long lower chin
  • Moderate facial asymmetry
  • Severe chin protrusion resulting in significant malocclusion
  • Long face, chin protrusion
  • Protruding chin due to under developed upper jaw
  • Protruding chin with severe asymmetry
  • Open bite chin protrusion

Major surgical methods in single-jaw surgery

There are two main types of single-jaw surgery; Sagittal Split Ramus Osteotomy (SSRO) and Intraoral Vertical Ramus Osteotomy (IVRO)

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Sagittal Split Ramus Osteotomy (SSRO)

  • Total fastening; does not tie the mouth or short mouth tie period
  • Large contact surfaces between the bone allowing quick fusion of the bones
  • Total fastening can be too stressful on the jaw
  • Possible nerve damage due to jaw division
  • Relatively long operation time
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Intraoral Vertical Ramus Osteotomy (IVRO)

  • No damage to the joints, allowing flexible movement after surgery
  • Minimal possibility of damage to the nerves
  • Less swelling and bleeding due to relatively short operation time
  • Surgical fastening pin, barely visible on x-rays
  • The mouth is tied for 2-3 weeks for stabilization as the palate is not fastened
  • The overlapping portion of the bone may be felt after surgery
  • Several weeks of physical therapy is required for functional rehabilitation

Basic Surgery Information

  • Duration of Surgery: 1-2 hours
    Method of Anesthesia: general anesthesia
  • Period of hospitalization: 1-2 days
    No need for suture removal
  • In-hospital treatment: 4 times
    Recovery period: 3 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)

SSRO is the most common method of single-jaw surgery.

Single-jaw surgery largely divides into SSRO and IVRO; where SSRO is more commonly used. As either method is not better or more appropriate than the other, the two methods can also be used together to guarantee results. To ensure all safety measures are taken in surgical procedures, it is important to thoroughly consult with Zeah’s highly experienced doctors for accurate diagnosis and precision surgery.

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.