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Crossbite and Underbite Correction Plastic Surgery

Homepage star of Sep 2010
[ Author:Fushun Ma | Time:2011-10-19 16:59:42 |  Font Size: [Large Medium Small]
Tags: overbite underbite sagittal split ramous osteotomy

Pre and post operative pictures of crossbite correction plastic surgery
Crossbite correction plastic surgery pre and post operation pictures. From the front view the only change one can notice is the chin getting rounder and less bony.

comparison pictures of crossbite correction plastic surgery
Comparison pictures of crossbite correction plastic surgery. Before operation the mandible is longer and the lower line of the mandible is straighter with no noticeable mandible angle. The lower lip located in front of the upper lip giving a underbite appearance. After operation these defects have been corrected and the profile outline is more graceful.

Comparison pictures of overbite correction plastic surgery
Comparison pictures of overbite correction plastic surgery. Before operation the mandible bone is too long to match the upper jaw and the lower incisors located in front of the upper incisors at occlusion position. After the surgery the mandible bone is pushed back to make the occlusion of the upper and lower incisors in normal position.

Comparison pictures of crossbite correction plastic surgery at chin up position
Comparison pictures of crossbite correction plastic surgery at chin up position. The mandible bone is shorter and the chin is not protruding any more post operatively.

Picture analysis of crossbite correction plastic surgery at chin up position
Picture analysis of crossbite correction plastic surgery at chin up position. "BC" is longer than "bc".

Sagittle Split Ramous Osteotomy for Crossbite Correction Plastic Surgery

Crossbite deformity is caused by the overgrowth of the mandible bone resulting in an appearance of protruding lower jaw and a malocclusion of lower incisors overbite. The face is narrow and long like a "horse face" in profile. The incisor and and back teeth is in malocclusion. With good adaption and wearing the grinding function of the back teeth is well preserved. The mandible ramous is longer than normal as a result of overgrowth. When the mouth is open in a same width the mandible process moves in a longer distance in the temporal mandible joint sockets than normal ramous length people. So many crossbite patients suffer from temporal mandible joint malfunction.

Sagittal Split Ramous Osteotomy(SSRO) splits the mandible bone between the mandible body and the mandible ramous sagittaly enabling the mandible body to move backward freely. The mandible body is pushed backward in a distance according to the preoperative design to make the mandible shorter and the mandible angle sharper. Then the mandible body and the mandible ramous are fixed together in the new relationship. The mandible reduction crossbite correction result is achieved by partial overlap of the mandible bone and narrowing the mandible angle.

Sagittal Split Ramous Osteotomy changes the relative position of the upper and lower jaw thus the upper and lower teeth. Though the occlusion returns to normal the contact surfaces of the teeth are mismatched caused by this change. The chewing function is impaired temporally. For the chewing function to return it is necessary to let the contact surface of the upper and lower teeth to adapt each other in one or two years. Occasionally some patients needs orthodontic to restore the normal chewing function. For this reason the patients may feel uncomfortable eating, such as prolonged eating time, chewing deficiency etc. during the early stage post operation.

Star Story 

This beautiful lady has very good look eyes, nose and mouth. The only problem is her over growth jaw. This gives her teeth a crossbite occlusion, also knowing as overbite teeth. When she went to see Dr. Fushun Ma she was told that a Sagittal Split Ramous Osteotomy(SSRO) will improve her appearance. She didn't have many question about this operation before she agreed to go into the operation room. Her post operation recovery was very smooth.

She didn't contact Dr. Fushun Ma until four months post operation when she was sent to another city and dropped by in Beijing and saw Dr. Fushun Ma. She told Dr. Ma that she felt there seemed a hump is raised at the far end of her right intro mouth surgical incision. After a careful examination of the surgical incision Dr. Ma didn't find any abnormal at the incision line and there was no foreign body left in the incision. So Dr. Ma asked her to observe for a period of time and not further information from her since then. It is safe to say she is fine.

Dr. Ma's Commnet

Walking on the street we often see beautiful girls and handsome boys with overbite occlusion. As a matter of fact certain degree of overbite make good facial pictures. So for people whose overbite doesn't interfere facial appearance a correction surgery is not needed. Surgery is warranted only for those whose overbite is so severe that disturbs the facial appearance or the temporal mandible joint.

Is every people with a protruding chin overbite? The answer is no. For those whose mandible simply over grow without any kind of malocclusion a sample mandible excess disorder is diagnosed. In case of surgery a simple chin reduction is needed to trim the praqotruding mandibular bone. If a person has over growth mandible and his or her lower incisors located in front of the upper incisors malocclusion of overbite formed. In this situation a simple mandible reduction doesn't work. A SSRO operation can restore the normal occlusion and facial appearance at the same time. In people with overbite malocclusion there may have some temporal mandible joint dysfunction beside appearance abnormalities. Surgeons should give consideration to any exist functioning disturbance and improve it with surgery as much as possible.

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