Corrective Jaw Surgery for Mandibular Retrognathia: A Comprehensive Guide by Dr. Park Jong-chul
- 박종철의사
- Nov 22, 2024
- 2 min read
Hello, I am Dr. Park Jong-chul, a specialist in oral and maxillofacial surgery.
Today, I will provide detailed information about corrective jaw surgery for mandibular retrognathia (weak chin), a topic many people are curious about.
Understanding Mandibular Retrognathia
Mandibular retrognathia, or a weak chin, refers to a condition where the lower jaw is small or recessed, disrupting facial harmony. Besides a short chin appearance, it can cause problems with chewing, speech, and even sleep apnea in severe cases. Fortunately, orthognathic surgery can effectively address these issues.
The Key to Mandibular Retrognathia Surgery: Finding the Centric Relation
Patients with mandibular retrognathia often have a significant discrepancy between their habitual occlusion (the position of the teeth when the mouth is closed) and centric relation (the most comfortable position for the temporomandibular joint). Therefore, accurate identification of centric relation is crucial during the surgical planning stage.
Centric Relation CT & Habitual Occlusion CT Analysis: We superimpose these two CT images to accurately assess the degree of jaw discrepancy.
CO CR discrepancy 
CO CR discrepancy CR Manipulation: Despite advanced digital technology, accurately determining a patient's centric relation relies heavily on the surgeon's skill and experience. We strive to find the precise centric relation for each patient.
CR manipulation (중심위 유도)
The Mandibular Retrognathia Surgery Procedure
Precise Analysis: We conduct a thorough analysis of facial morphology, occlusion, and temporomandibular joint function using 3D CT scans, X-rays, and intraoral scans.
Corrective Jaw Surgery for Mandibular Retrognathia Surgical Simulation: We use CAD software to predict surgical outcomes and engage in detailed discussions with the patient to establish clear surgical goals.
Corrective Jaw Surgery for Mandibular Retrognathia Surgical Simulation Jawbone Repositioning: The maxilla (upper jaw) and mandible (lower jaw) are repositioned to correct jaw alignment. In cases of double jaw surgery with counter-clockwise rotation, bone grafting is performed in areas without bone contact to ensure stable results.
double jaw surgery with counter-clockwise rotation Genioplasty: If necessary, we adjust the length and angle of the chin to create a more aesthetically pleasing jawline.
double jaw surgery with counter-clockwise rotation and genioplasty Mandibular Angle Reduction: In some cases, we may perform mandibular angle reduction to smooth the facial contours. However, this is approached cautiously in patients with mandibular retrognathia, as they may have weaker bite force.
double jaw surgery with angle reduction
Post-operative Care: The Path to Jaw Function Recovery
After mandibular retrognathia surgery, the focus is on strengthening masticatory function. Patients with a weak chin often have weak masticatory muscles, making consistent post-operative training crucial.
Mouth Opening Exercises: These exercises help restore temporomandibular joint flexibility and improve the ability to open the mouth wide.
Chewing Exercises: Strengthen the masticatory muscles by practicing chewing food thoroughly.
Consistent mouth opening exercises and chewing training are effective in normalizing jaw function and preventing relapse. Active participation in post-operative care under the guidance of medical professionals is essential.
Mandibular Retrognathia with Anterior Open Bite: Remarkable Transformation!
Below is a case demonstrating the improvement of mandibular retrognathia with anterior open bite solely through muscle strengthening. Remarkably, the open bite improved without any intervention over 1 year and 8 months.
Mandibular Retrognathia Surgery: Regain Your Confidence!
Corrective jaw surgery for mandibular retrognathia is a significant decision that goes beyond mere aesthetic improvement; it enhances the quality of life. It can resolve various issues related to chewing, speech, sleep, and boost self-confidence.
If you have any questions, please feel free to contact us. We are happy to provide you with a consultation. Thank you.
