The big teeth, also known as molar teeth, molar teeth appear activity loosening, need to find the cause first, according to the cause of the need to adjust the jaw fixed observation, periodontitis caused by the need for periodontal treatment, the situation is serious also need to consider extraction. 1. Root fracture. Large teeth appear loose, can move around the phenomenon may be due to trauma or diet too hard food, resulting in root loosening, if the fracture line is located in the gingival sulcus below can be considered to adjust the jaw fixed observation, if there are symptoms of endodontitis need to carry out endodontic treatment, fracture line through the gingival sulcus need to be, after the extraction of loose crowns do root canal treatment. 2. Periodontitis. Periodontitis leads to loss of attachment is also easy to cause tooth loosening, generally need to carry out periodontal treatment, remove the attached tartar, periodontal pockets on the drug containing rinsing chlorhexidine, after the elimination of inflammation, can reduce tooth loosening or limit the teeth to continue to loosen. The medication should be prescribed by the doctor. If the tooth loosening is obvious or the inflammation is too severe to be treated, it is necessary to consider prosthetic restoration after extraction.