For the Chinese, there is nothing that a few rounds of mahjong can’t solve during every festival. If there is, it is to play a few more rounds! For mahjong lovers, there is nothing that can be selected as one of the ten most painful things in life than playing mahjong three short of one. The pain of playing mahjong three short of one, everyone knows. But the pain of three missing teeth, less people ask for it. What will happen if you don’t fill the “three missing teeth”? Hazard one: the adjacent teeth will be loosened and two more teeth will be lost. After the teeth are missing, the adjacent teeth will be tilted to the missing gap because there is no fixed reliance, which will cause the surrounding neighboring teeth to be loosened over time, resulting in serious damage to the normal function of the whole mouth teeth. Hazard two: the elongation of the teeth, and then lose a lower tooth missing a tooth, long-term failure to repair, the corresponding tooth above will have elongation phenomenon. Severe can also occupy the entire missing gap, causing the teeth can not be repaired, resulting in bite disorder. Hazard 3: Food embedding, bad breath Normal teeth are closely aligned with each other, once the neighboring teeth move, there will be gaps between teeth, which will easily make food embedding into the gap between teeth, thus causing bad breath, tooth decay, periodontal disease, etc. Hazard 4: Bacteria accumulation, caries is difficult to prevent Missing teeth will cause tooth decay (tooth decay), missing teeth will lead to food embedding, in this case, food embedding into the gap between teeth, it is very difficult to clean, long time bacteria accumulation will cause tooth decay. Eventually, “three missing teeth” will become “one missing tooth”. What are the methods to repair missing teeth? 1.Activated denture The advantage of activated denture is low price and convenient repair. However, wearing a strong sense of foreign body and may affect the pronunciation, and low chewing efficiency, may also be easy to damage adjacent teeth, causing gum tissue atrophy, alveolar bone resorption and temporomandibular joint disorders and other adverse consequences. More than half of the people do not use the movable dentures correctly, think that as long as they can be used, do not change, or even a decade or so never replaced. In fact, movable dentures need to be replaced every 3 to 5 years, long-term use of the price is not cheap. 2, fixed dentures Porcelain dental restoration requires two adjacent healthy teeth as the cost to achieve the “bridge”. In other words, missing a tooth, you need to bear the cost of three porcelain teeth. This cost is not much different from the cost of a single dental implant. Although porcelain teeth are realistic and sturdy, if the restoration fails, it will not only sacrifice the two adjacent good teeth, but also extend to both sides in turn. It may also be easy to cause decay and inflammation of the abutment teeth, and in serious cases may cause osteomyelitis of the jaw bone, skin fistula, causing irreversible damage. 3, dental implant restoration In the long run, dental implant restoration is actually the most cost-effective restoration method. If the patients with missing teeth are financially capable, it is recommended to choose artificial root restoration, which can avoid the trouble of cleaning and maintenance of movable dentures, without the need to grind the neighboring teeth like porcelain teeth, and can obtain the chewing function and aesthetic degree comparable to real teeth. With better dental implant technology, patients can be extracted and implanted in the first instance, completing all the items in a single procedure, without waiting for the 3 – 6 months osseointegration period, and achieving the maximum aesthetic restorative dental effect.