Zheng Bo has a set of neat and white teeth, when he was young, he was often proud of it. But in recent years but gradually feel sore and soft teeth, chewing food is not effective, a meal down often feel tired face muscles, sometimes have to stop and rest to continue to eat, they look in the mirror and did not see the mouth missing teeth, really puzzling! Later, he went to the Department of Prosthodontics of the Zhongshan University Dental Hospital and was diagnosed with “temporomandibular joint disease”. The doctor found that his teeth were excessively worn out, the crown was shortened, the height was uneven, the movement of the lower jaw was obstructed, and the distance between the lower third of the face was reduced. The doctor drew up a treatment plan for him, and first made an occlusal plate to restore the height of the bite, which was worn for a short period of time to make Zheng feel less tired of chewing food. In other words, although Zheng is not missing a single tooth, he needs a full denture crown! Occlusal disorders are the main cause of TMJ disease. So what causes bite disorders? 1, with the gradual increase in age, teeth are constantly worn, especially those who have night grinding disease or bite hard objects and other bad habits, the teeth will be prematurely excessive wear, as in the case of Zheng Bo; 2, some parts of the teeth missing for various reasons, if not set for a long time, the remaining teeth can be paired up and down is bound to be overburdened, more likely to wear excessive, while the teeth can not be paired tilt, elongation, resulting in 3, the whole mouth teeth due to poor restoration led to bite too low, too high or skewed, etc.. Over time, muscle pain, joint pain, popping or difficulty in opening the mouth, and even temporomandibular joint disease symptoms such as headache, neck pain, and back pain can occur. Many patients often come to the doctor because they are unable to chew food normally. They think they only need to insert a few missing teeth, but the prosthodontist tells them that they need to extract loose teeth, grind short teeth after root canal treatment for tilted and elongated teeth, use prosthetic crowns (e.g. porcelain crowns) to raise the teeth that are missing, and use movable dentures, fixed dentures, combined movable-fixed dentures or implant dentures to restore the missing teeth. Some teeth are obviously “fine” and need crowns, …… and so on, which are much bigger than expected, and the cost is also much higher. Is the doctor making a fuss to make things difficult for the patient? Or are they just trying to make money? In fact, this is the “occlusal reconstruction” restoration. Occlusal reconstruction is generally used for the treatment of temporomandibular joint disease caused by tooth wear, or for those who need to open up space for dental inlays and raise the bite, in addition to the increasing pursuit of facial proportions, some people require an increase in the height of the lower third of the face to improve facial appearance, and eventually also need to perform occlusal reconstruction repair. The occlusal reconstruction process is technically demanding and often requires doctors to have comprehensive knowledge of restorative dentistry, to develop a suitable treatment plan according to the patient’s oral condition, requirements, and financial ability, and to have some foresight of the restoration effect; the occlusal reconstruction process is long, mainly because patients need to have an adaptation process to the newly established occlusal system, which takes three months for short cases and a year and a half for long cases to wear a transitional denture. It takes three months and a year and a half for the patient to wear the transitional denture, and only after complete adaptation can the permanent denture be completed. The cost of occlusal reconstruction varies depending on the design of the restoration, for example, removable dentures are relatively inexpensive, while fixed dentures are more expensive, so patients can choose according to their preferences and consumption levels. The effect of occlusal reconstruction is undeniable. When an uneven or defective tooth is restored by occlusal reconstruction, its form and function will be perfect, or when the old face with “no teeth to show” will be rejuvenated, you will sincerely exclaim: it is worth it!