大家都知道"早晚刷牙，不长蛀牙"，但一些小伙伴可能会问："为什么一天要刷两次牙？""懒人只想刷一次，早上刷好还是晚上刷好？" 今天就告诉你为什么一天要刷两次牙？为什么晚上刷牙不能省？ 为什么每天至少刷两次牙？ 口腔健康的两大公敌：龋病（蛀牙）和牙周病（老掉牙），都是由长期附着在牙齿表面的细菌不断堆积繁殖，持续破坏牙齿和牙周支持组织导致的。 但是这些细菌并不是一开始就牢牢地粘在牙面上了，形成稳定成熟的菌斑需要一个过程： 一阶段——初期附着（0—2小时）当你刚刷完牙，其实新的牙菌斑就又开始形成了，但这时候只有少量松散的细菌借助唾液薄膜附着在牙面上。 二阶段——细菌附着（2—12小时）越来越多的细菌通过与唾液膜相互作用附着在牙面上，并且比一阶段更牢固。 三阶段——成熟菌斑（12小时后）附着的细菌开始繁殖代谢并形成复杂的生物膜结构，菌斑逐渐成熟。成熟的菌斑结构更加紧密，难以通过简单的刷牙去 除。 四阶段——完全成熟（24小时后）经过24小时，牙菌斑完全成熟，形成一个复杂的微生物群落。此时的菌斑对口腔健康威胁很大，容易引发龋齿和牙周疾 病。 从菌斑成熟的过程和时间可以看出，通过刷牙机械摩擦和牙膏辅助清洁，能够去除牙面上 ...

新华社北京9月18日电（记者李佳巍）"一直早刷晚刷，足够重视，为啥牙齿还是老出问题？"时不时响起"警报"的牙齿健康，让不少一天两次"按 时足量"刷牙的网友疑惑不解。 陕西省西安市新城区通济坊小学的学生在西安交通大学口腔医院口腔科普教育基地学习正确的刷牙方法。新华社记者 李一博 摄 横向"拉锯式"刷牙，错！ "众多牙病患者都存在牙齿楔状缺损问题，而长期错误地横向'拉锯式'刷牙正是罪魁祸首。'越用力刷牙越干净'是个误区，这个举动就像拿砂纸磨 损牙颈，对牙齿造成的损伤不可逆。"北京大学口腔医院预防科主任医师荣文笙说。 为何刷牙不能横向"用力过猛"？专家介绍，牙釉质是人体最坚硬的组织，是保护牙齿的"盔甲"，但其厚度呈"山峰-山谷"分布，即牙冠部（咀嚼 面）最厚，牙颈部（牙龈边缘）最薄。横向刷牙时，刷毛与牙齿形成45°角切割力，长期作用就像用钢锉反复摩擦薄弱的"山谷"。 荣文笙说，许多人日常习惯侧重牙齿表面清洁，喜欢刷"顺手"的地方。而对于牙齿缝隙处往往忽视，清洁难以触达牙龈边缘、牙间隙等部位，这 一清洁"盲区"往往成为牙菌斑滞留重灾区，给"蛀牙刺客"邻面龋发生以及牙周疾病的发展提供了繁衍温床。 牙周病是影响我国居民口 ...

Core Insights - Periodontal disease is a common health issue affecting over 90% of adults in China, often overlooked until severe symptoms arise [1][2] - Early signs such as gum bleeding and bad breath are frequently ignored, leading to more serious conditions like periodontitis [2][5] - The treatment of periodontal disease is a long-term process involving multiple stages, and maintaining oral hygiene is crucial to prevent recurrence [4][5] Group 1: Understanding Periodontal Disease - Periodontal disease is characterized by chronic inflammation of the supporting structures of teeth, primarily caused by poor oral hygiene leading to plaque and tartar buildup [2][3] - Risk factors include systemic conditions like diabetes, lifestyle choices such as smoking, and genetic predispositions [3] - The disease is linked to various health issues, including cardiovascular diseases and Alzheimer's disease, highlighting its systemic impact [2] Group 2: Treatment and Management - Treatment involves four stages: basic treatment (scaling), surgical intervention if necessary, multidisciplinary repair or orthodontic treatment, and long-term maintenance [4] - Patients often experience anxiety and frustration during treatment, especially when faced with tooth loss or the need for extensive procedures [5][6] - Successful management requires regular dental check-ups and adherence to oral hygiene practices, including proper brushing techniques and the use of dental floss [8][9] Group 3: Prevention and Awareness - Many individuals lack awareness of the importance of regular dental check-ups, often seeking treatment only after significant issues arise [9] - Education on proper oral hygiene practices is essential, as many people do not receive adequate guidance on brushing and flossing [9] - The introduction of national policies to reduce the cost of dental implants may improve access to treatment for those affected by periodontal disease [7]

Core Viewpoint - The article discusses the prevalence and implications of periodontal disease, highlighting its impact on both oral and overall health, as well as the importance of prevention and treatment strategies. Group 1: Understanding Periodontal Disease - Periodontal disease is a chronic infectious disease that primarily affects the supporting structures of teeth, including gums, periodontal membrane, alveolar bone, and cementum [6][7] - The disease is often overlooked as it is commonly perceived as an issue for older adults, but it can affect individuals of all ages due to its subtle early symptoms [6][11] Group 2: Impact of Periodontal Disease - Periodontal disease can lead to severe consequences such as tooth mobility and loss, which not only affects chewing function but also impacts aesthetics and social confidence [8][9] - There is a significant correlation between periodontal disease and systemic health issues, including diabetes, cardiovascular diseases, and potentially neurological disorders [8][9] Group 3: Prevalence and Awareness - The prevalence of periodontal disease in China is notably high, with a reported 87.4% incidence of gum bleeding among individuals aged 35-44, an increase of 10.1% over the past decade [11] - Only about 10% of adults in China maintain good periodontal health, indicating a need for increased awareness and education regarding oral health [11] Group 4: Prevention and Treatment - Effective prevention and treatment of periodontal disease require good oral hygiene practices, including proper brushing techniques and regular dental check-ups [12][13] - Treatment may involve professional cleaning, risk assessment, and in some cases, surgical intervention, depending on the severity of the disease [12][14] - Nutritional factors play a role in periodontal health, with a balanced diet being essential for maintaining immune function and overall health [15]

Core Viewpoint - The article discusses the health concerns surrounding Wei Dongyi, a well-known mathematician, particularly focusing on his dental health issues, specifically periodontitis, and the broader implications of such health conditions on overall well-being [2][10][12]. Group 1: Health Concerns - Wei Dongyi's social media presence has garnered significant attention, with over 22.6 million followers and 13.5 million likes on his videos as of June 8 [2]. - Concerns have been raised regarding Wei's health, particularly his dental issues, which have led to discussions about the responsibilities of his family and educational institutions in supporting his well-being [5][6]. - Periodontitis, a chronic inflammatory disease affecting the supporting structures of teeth, is highlighted as a common yet often overlooked health issue that can lead to severe consequences if untreated [8][10]. Group 2: Impact of Periodontitis - Periodontitis is linked to various systemic health issues, including diabetes and cardiovascular diseases, making it a significant public health concern [10][11]. - The prevalence of periodontitis among adults in China is alarmingly high, with less than 10% of the adult population maintaining good periodontal health [8]. - The disease can lead to tooth loss and has been identified as a primary cause of tooth loss in adults, emphasizing the need for early detection and treatment [8][10]. Group 3: Prevention and Treatment - Effective prevention strategies include maintaining good oral hygiene, regular dental check-ups, and addressing risk factors such as smoking and poor nutrition [14]. - The integration of artificial intelligence in the diagnosis and treatment of periodontal diseases is emerging as a promising avenue, potentially improving early detection and personalized treatment plans [14]. - While periodontitis cannot be completely cured, it can be managed effectively through professional treatment and self-care, allowing patients to maintain a stable functional state of periodontal health [15].

Core Viewpoint - The article discusses the increasing concern over oral health, particularly focusing on the phenomenon of widening gaps between teeth, its causes, implications, and preventive measures. Group 1: Causes of Widening Gaps - Aging leads to gum recession and bone loss, which can cause teeth to appear more spaced apart [3][4] - Periodontal disease affects nearly 90% of adults aged 35-44, contributing significantly to the widening of gaps between teeth [5] - Incorrect dental habits, such as using teeth as tools or improper brushing techniques, can damage gums and exacerbate the issue [7][9] Group 2: Implications of Widening Gaps - Aesthetic concerns arise as larger gaps can create an impression of aging and poor dental health [11] - Functional issues include food trapping, increased risk of cavities, and worsening bad breath due to difficulty in cleaning [12] Group 3: Preventive Measures - Regular dental cleanings every 1-2 years can help remove tartar and prevent gum recession [13] - Proper brushing techniques and the use of dental floss instead of toothpicks are recommended for maintaining gum health [14] - Timely dental restoration for missing teeth is crucial to prevent adjacent teeth from shifting and creating larger gaps [16]