智齿一定要拔吗？可以一次拔两颗吗？｜證據鏈

智齿一定要拔吗？可以一次拔两颗吗？｜證據鏈

F-Units（事实单元帐）

• F1｜本题选题依据＝14 诊所站 GSC 全量对帐，本题属生产伫列页「三、诊所补题」区（非主伫列 50 题），查询「智齿一定要拔吗」曝光 19,331，来源站单一｜来源 #18｜confidence=high｜basis=internal_dataset｜period=GSC 保留窗（2025-03-22 起）｜geo: TW｜caveat：曝光为属性级数字、非去重流量；本栏为内部数据，非医学宣称，发布转档时整条剥除。
• F2［结构性整理］｜本卡的三层分流骨干（立即就医／尽快看诊／可安排评估与追踪）、「保留的已知风险 vs 拔除的已知风险」对照结构、每组数字的分母标注原则、「一次拔几颗」改写为「由谁评估、评估什么」的处理方式，以及与 KM-DENTAL-01／04／40／21／05／33 的同族分工声明，均为本站依 F3 至 F21 文献整理的就医沟通结构｜来源 #20｜confidence=n/a｜basis=editorial_framework｜period=2026-08-06｜geo: universal｜caveat：非诊断工具、非临床分类，不得标为待验；本栏不含任何疗效或时程宣称。
• F3｜Cochrane 系统性回顾（无症状且无疾病之阻生智齿：手术拔除相对于保留）：结论为现有证据不足以判定应拔除或保留；保留可能与长期邻近第二大臼齿牙周炎风险增加有关，惟该证据确定性为极低；鉴于现有证据不足，应考量病人价值观并运用临床专业以共同决策；若决定保留，建议以固定间隔进行临床评估以预防不良结果｜来源 #1｜confidence=verified｜basis=peer_reviewed（PMID 32368796，Cochrane 系统性回顾 CD003879.pub5）｜period=2020（检索至 2019-05-10）；版本链与撤回查核已做——2026-08-06 以 `CD003879` 检索 PubMed 回传 4 笔（15846686／22696337／27578151／32368796），本篇 pub5 为现行最新版；四笔 esummary pubtype 皆无 Retracted Publication／标题无 WITHDRAWN｜geo: universal｜span:「Insufficient evidence is available to determine whether asymptomatic disease-free impacted wisdom teeth should be removed or retained」「Although retention of asymptomatic disease-free impacted wisdom teeth may be associated with increased risk of periodontitis affecting adjacent second molars in the long term, the evidence is very low certainty」「Given the current lack of available evidence, patient values should be considered and clinical expertise used to guide shared decision-making with people who have asymptomatic disease-free impacted wisdom teeth」「If the decision is made to retain these teeth, clinical assessment at regular intervals to prevent undesirable outcomes is advisable」｜caveat：本回顾的范围限于「无症状且无疾病」的阻生智齿，不涵盖已有症状或已有病理变化者；「证据不足以判定」是对研究证据的评价，不等于两种做法效果相同，亦不得被读成鼓励自行决定不就医。
• F4｜同一回顾之背景叙述：阻生智齿可能与冠周炎、牙根吸收、牙龈与齿槽骨疾病（牙周炎）、蛀牙以及囊肿与肿瘤的发生等病理变化有关；当手术拔除在较年长者身上执行时，术后并发症、疼痛与不适的风险增加｜来源 #1｜confidence=verified｜basis=peer_reviewed（PMID 32368796）｜period=2020｜geo: universal｜span:「Impacted wisdom teeth may be associated with pathological changes, such as pericoronitis, root resorption, gum and alveolar bone disease (periodontitis), caries and the development of cysts and tumours」「When surgical removal is performed in older people, the risk of postoperative complications, pain and discomfort is increased」｜caveat：此两句为该回顾的背景叙述，不是其比较两组后得出的结果；本卡在正文已逐句标明其层级，禁被引用为该回顾的结论。
• F5｜同一回顾之纳入研究与其限制：本次更新纳入与前版相同的两项研究，一项为英国牙科医院场域之平行分组随机对照试验，一项为美国私人执业部门之前瞻世代研究；世代研究之次人群为 416 位健康男性参与者、年龄 24 至 84 岁；该研究中关于蛀牙风险，证据不足以显示有无阻生智齿之差异；随机对照试验随机分派 164 人、实际分析 77 位青少年参与者，比较拔除与保留对五年后牙弓尺寸变化之影响，该研究为高偏差风险且未显示拔除对牙弓尺寸变化有临床上显著效果；无任何符合资格之研究报告拔除相对于保留对健康相关生活品质之影响｜来源 #1｜confidence=verified｜basis=peer_reviewed（PMID 32368796）｜period=2020｜geo: universal｜span:「This review update includes the same two studies that were identified in our previous version of the review: one RCT with a parallel-group design, which was conducted in a dental hospital setting in the United Kingdom, and one prospective cohort study, which was conducted in the private sector in the USA」「One prospective cohort study, reporting data from a subgroup of 416 healthy male participants, aged 24 to 84 years」「during a follow-up period of three to over 25 years」「there is insufficient evidence to demonstrate a difference in caries risk associated with the presence or absence of impacted wisdom teeth」「One RCT with 164 randomised and 77 analysed adolescent participants compared the effect of extraction with retention of asymptomatic disease-free impacted wisdom teeth on dimensional changes in the dental arch after five years」「No evidence from this study, which was at high risk of bias, was found to suggest that removal of asymptomatic disease-free impacted wisdom teeth has a clinically significant effect on dimensional changes in the dental arch」「No eligible studies in this review reported the effects of removal compared with retention of asymptomatic disease-free impacted wisdom teeth on health-related quality of life」｜caveat：世代研究之次人群全为男性，其牙周炎结果不得外推至女性；「没有证据显示有效果」不等于「已证明无效果」，本卡在正文已标明此区别。
• F6｜英国卫生科技评估报告（下颚阻生智齿预防性拔除相对于保留与常规照护之系统性回顾与经济评估；临床回顾纳入 4 项世代研究与 9 篇系统性回顾）：若已有病理变化，英国国家健康与照顾卓越研究院当时之指引立场为该阻生智齿应予拔除；三项报告保留后果之研究中，被保留的下颚阻生智齿之拔除率自 5.5% 至 31.4% 不等，该差异可由追踪期不同（1 年与 5 年）解释；两项报告手术并发症之研究中未报告严重并发症；比较预防性拔除与保留及常规照护之证据非常有限；该评估团队自建之探索性模型结果显示预防性拔除可能为较具成本效益之策略；其限制第一项即为未找到头对头试验｜来源 #2｜confidence=verified｜basis=peer_reviewed（PMID 32589125，Health Technology Assessment 系统性回顾与经济评估）｜period=2020（检索至 2016-04-29）｜geo: universal｜span:「If there are pathological changes, the current National Institute for Health and Care Excellence guidance states that the impacted third molar should be removed」「The clinical review identified four cohort studies and nine systematic reviews」「Pathological changes due to retention of asymptomatic impacted mandibular third molars were reported by three studies」「In the two studies that reported on surgical complications, no serious complications were reported」「the extraction rate for retained impacted mandibular third molars varied from 5.5% to 31.4%; this variation can be explained by the differing follow-up periods (i.e. 1 and 5 years)」「The evidence comparing the prophylactic removal of impacted mandibular third molars with retention and standard care is very limited」「suggest that prophylactic removal may be the more cost-effective strategy」｜caveat：该报告之指引立场与经济模型属英国国民保健体系脉络，非台湾或日本规范，亦非本站对任何国家制度之陈述；经济模型以英国成本与效用资料建构，本卡不引用其任何金额或成本效益比值；模型为探索性、建立于观察性资料，作者自载未找到头对头试验。
• F7｜系统性回顾与统合分析（13 项研究、13,788 位病人；依 Newcastle-Ottawa Scale 评估品质）：与下颚阻生智齿相邻之下颚第二大臼齿远心面蛀牙之整体盛行率为 29.89%（95% CI 21.05% 至 38.74%，p < 0.001）；依 Winter 分类，近中倾斜位置与蛀牙关联较高，为 43.37%（95% CI 33.03% 至 53.70%，p < 0.001）｜来源 #3｜confidence=verified｜basis=peer_reviewed（PMID 39853442，系统性回顾与统合分析，PROSPERO CRD42023393143）｜period=2025（纳入近十年发表之研究）；检索日 2026-08-06｜geo: universal｜span:「Thirteen studies met the inclusion criteria and underwent analysis; they included a total of 13,788 patients」「The overall prevalence of caries in MSMs adjacent to IMTMs was 29.89% (CI 95%: 21.05 - 38.74%; p < 0.001)」「Following Winter's classification, the mesioangular position was the most frequently associated with caries with 43.37% (CI 95%: 33.03 - 53.70%; p < 0.001)」｜caveat：该回顾未设置无阻生智齿之对照组，所报告者为盛行率而非风险差，不得被读成拔除可减少该比例，亦不得作为个人机率；纳入研究以影像与临床诊断为主，人群跨多国。
• F8｜系统性回顾与统合分析（影像上齿冠周间隙正常（≤3 公厘）之无症状阻生智齿的齿冠周滤泡；7 项研究、592 个滤泡；以 Joanna Briggs Institute 工具评估偏差风险，多数为中度风险、1 项为高风险；检索至 2025-11）：囊性变化之合并盛行率为 26.7%（95% CI 3.7% 至 49.6%）、含齿囊肿为 21.6%（95% CI 12.9% 至 32.2%），两者异质性极高（I2 大于 97%）；作者结论为这些发现须谨慎解读，且现有证据并不支持仅凭这些发现进行预防性拔除｜来源 #4｜confidence=verified｜basis=peer_reviewed（PMID 42144023，系统性回顾与统合分析，线上先行版）｜period=2026；检索日 2026-08-06；esummary pubtype 无 Retracted Publication｜geo: universal｜span:「in pericoronal follicles with a normal radiographic appearance (≤3 mm) associated with asymptomatic impacted third molars」「Seven studies (592 pericoronal follicles) were included」「The pooled prevalences of cystic changes and dentigerous cysts were respectively 26.7%, (95% CI: 3.7 to 49.6%) and 21.6% (95% CI: 12.9 to 32.2%), both with very high heterogeneity (I2 > 97%)」「current evidence does not support prophylactic extraction based solely on these findings」｜caveat：分母为被手术取下并送组织病理检查之齿冠周滤泡，非全人口之无症状智齿；异质性极高（I2 大于 97%）使合并值不稳定；与 F9 之 5.3% 定义与分母皆不同，禁比较或相加。
• F9｜系统性回顾（仅纳入以组织病理诊断病灶之研究；自 1,300 篇筛得 16 篇；以 Joanna Briggs Institute 盛行率研究工具评估偏差风险，7 篇高、7 篇中、2 篇低）：与阻生智齿相关之齿源性囊肿与肿瘤盛行率为 5.3%（95% CI 3.1% 至 8.1%）；其中囊肿 4.4%（95% CI 2.5% 至 6.8%）、肿瘤 0.5%（95% CI 0.2% 至 0.9%）｜来源 #5｜confidence=verified｜basis=peer_reviewed（PMID 31005378，系统性回顾）｜period=2019；**版本时效已查——2026-08-06 以 `impacted third molar*[Title] AND prevalence[Title] AND (systematic review[pt] OR meta-analysis[pt])` 检索回传 1 笔即本篇；另检得 2026 年范围更窄之 F8 并陈，本卡以 F8 为现行且更贴题者｜geo: universal｜span:「From 1,300 studies identified, 16 met the inclusion criteria」「The prevalence of odontogenic cysts and tumors associated with ITM was 5.3% (95%CI: 3.1%-8.1%) of ITM」「Odontogenic cysts in particular were found in 4.4% (95%CI: 2.5-6.8%) of the extracted ITM, whilst odontogenic tumors in 0.5% (95%CI: 0.2-0.9%)」｜caveat：分母为已被拔除之阻生智齿（原文即写 extracted ITM），存在选择性偏差，不得读为全人口阻生智齿的发生率或个人机率**；7 篇纳入研究为高偏差风险。
• F10｜回溯观察研究（在阻生智齿持续存在之前提下，比较两时间点第二大臼齿远心面之影像骨水准；51 位病人、平均年龄 45 岁、68 颗第二大臼齿、平均间隔 20 个月）：垂直向、斜向与角度骨水准于两时间点间无显著变化；作者结论为本分析未提供证据支持「预防性拔除阻生智齿可带来显著保骨效益」之假说，亦未确立长期保留阻生智齿必然导致邻近第二大臼齿之短期骨变化｜来源 #6｜confidence=verified｜basis=peer_reviewed（PMID 40647642，回溯观察研究）｜period=2025；检索日 2026-08-06｜geo: universal｜span:「A total of 51 patients met the inclusion criteria, with a mean age of 45 years (SD ± 13)」「Sixty-eight second molars were assessed at baseline (T0) and follow-up (T1), with a mean interval of 20 months (SEM ± 62 days). No significant changes were found in vertical, oblique, or angular bone levels between T0 and T1」「this analysis does not provide evidence to support the hypothesis that prophylactic extraction of ITMs yields significant bone-sparing benefits」｜caveat：单中心、样本小、平均间隔仅 20 个月，属短期观察；作者明言需更多研究评估中长期影响；不得作为长期保留安全性的证据。
• F11｜冠周炎处置之叙事回顾与抗生素开立之系统性回顾：实证建议为局部治疗优先于开立抗生素，抗生素应保留给严重情况；牙医师问卷显示将近 75% 会为冠周炎开立抗生素，病人资料研究显示超过半数冠周炎病人被开立抗生素；作者将冠周炎的不适当处置列为牙科抗生素过度使用的关键因素｜来源 #7｜confidence=verified｜basis=peer_reviewed（PMID 34202699，叙事回顾＋系统性回顾，检索期 2000-01 至 2021-05）｜period=2021｜geo: universal｜span:「recommending the local therapy over antibiotic prescribing, which should be reserved for severe conditions」「Questionnaires among dentists revealed that almost 75% of them prescribed antibiotics for pericoronitis」「Studies involving patients showed that antibiotics were prescribed to more than half of the patients with pericoronitis」｜caveat：开药比例来自跨国问卷与病历研究，非任一特定地区之现况，亦非对任何医师处方之评价；本卡引用其处置顺序原则；同 KM-DENTAL-05 卡 F11 锚。
• F12｜Cochrane 系统性回顾（下颚智齿手术拔除之不同手术方法；62 项试验、4643 位参与者；33 项评为高偏差风险、29 项不清楚）：背景载明手术拔除下颚智齿之适应症为缓解局部疼痛、肿胀与张口受限，以及预防偶尔可能危及生命之感染扩散；手术常伴随短期术后疼痛、肿胀与张口受限，较不常见者为感染、干槽症（齿槽骨炎）与三叉神经损伤｜来源 #8｜confidence=verified｜basis=peer_reviewed（PMID 32712962，Cochrane 系统性回顾 CD004345.pub3）｜period=2020（检索至 2019-07-08）；版本链已查——2026-08-06 以 `CD004345` 检索回传 2 笔（25069437／32712962），本篇为现行版；pubtype 无 Retracted Publication｜geo: universal｜span:「The indications for surgical removal of these teeth are alleviation of local pain, swelling and trismus, and also the prevention of spread of infection that may occasionally threaten life」「Surgery is commonly associated with short-term postoperative pain, swelling and trismus. Less frequently, infection, dry socket (alveolar osteitis) and trigeminal nerve injuries may occur」「We included 62 trials with 4643 participants」｜caveat：背景所述之适应症与并发症为该回顾的叙述，非其比较结果；该回顾多数比较之结论为证据不足以判定各手术方法之差异；本卡不描述任何手术操作方式。
• F13｜系统性回顾（下颚阻生智齿拔除后下齿槽神经损伤之风险关系；自 693 篇筛得 23 项研究，合计 26,427 位病人、44,171 颗牙；检索期 1990-01 至 2019-03）：在该 44,171 例拔除中，1.20% 发生暂时性下齿槽神经功能缺损、0.28% 发生永久性缺损；统计上显著之风险因子为阻生深度、下颚管与智齿之接触、手术方法、术中神经暴露与术者经验｜来源 #9｜confidence=verified｜basis=peer_reviewed（PMID 31476533，系统性回顾）｜period=2020；**版本时效已查——2026-08-06 以 `(inferior alveolar nerve[Title] OR nerve injury[Title]) AND third molar*[Title] AND (systematic review[pt] OR meta-analysis[pt])` 依日期排序检索回传 12 笔，较新之同题回顾为 F14（2026 年，主题为影像预测因子），两者口径不同故并陈｜geo: universal｜span:「Twenty-three studies out of 693 articles from the initial search were finally included, which summed up a total of 26,427 patients (44,171 teeth)」「Among 44,171 IMTM extractions performed by various grades of operators, 1.20% developed transient IAN deficit and 0.28% developed permanent IAN deficit respectively」「Depth of impaction (P<0.001), contact between mandibular canal (MC) and IMTM (P<0.001), surgical technique (P<0.001), intra-operative nerve exposure (P<0.001), and surgeon's experience (P<0.001) were statistically significant as contributing risk factors of IAN deficits」｜caveat：纳入研究之术者层级不一（原文写 various grades of operators），比例为跨研究汇总而非任一场域之现况，不得作为个人风险估计，亦不得作为对任何医师或院所之能力评价**；该回顾未进行统合分析。
• F14｜系统性回顾与统合分析（第三大臼齿手术之下齿槽神经损伤断层影像预测因子；18 项研究、辨识出 8 项影像特征；16 项研究为低偏差风险；GRADE 评为中度至高度确定性；PROSPERO CRD42024582042）：胜算比显著上升者为皮质骨缺失（OR 9.87，95% CI 4.10 至 23.83）、哑铃形下颚管（OR 8.25，95% CI 3.19 至 21.35）与舌侧位置（OR 3.82，95% CI 1.95 至 7.39）；同时具备此三项特征者风险上升（OR 5.06，95% CI 2.23 至 11.39）｜来源 #10｜confidence=verified｜basis=peer_reviewed（PMID 41770179，系统性回顾与统合分析）｜period=2026；检索日 2026-08-06；esummary pubtype 无 Retracted Publication｜geo: universal｜span:「In 18 studies, researchers identified 8 tomographic features that predict IAN injury during third-molar extraction. Sixteen studies had a low risk of bias」「The Grading of Recommendations Assessment, Development and Evaluation framework indicated moderate to high certainty of evidence」「Significant increases in odds ratios (ORs) (with P < .001) were observed for the absence of cortical bone (OR, 9.87; 95% CI, 4.10 to 23.83), a dumbbell-shaped canal (OR, 8.25; 95% CI, 3.19 to 21.35), and a lingual position (OR, 3.82; 95% CI, 1.95 to 7.39」「Patients exhibiting all 3 features had an increased risk of experiencing IAN injury after mandibular third-molar extraction (OR, 5.06; 95% CI, 2.23 to 11.39)」｜caveat：胜算比为相对量度、非绝对风险；影像判读属医师与口腔颚面放射专业之工作，本卡不提供任何自行判读方法；原文第三项胜算比之括号在来源中未闭合，本卡 span 照原文节录至数值处。
• F15｜系统性回顾与统合分析（与下颚管接触之下颚智齿行齿冠切除术之并发症；以 RoB 2.0 评估偏差风险；疼痛结果分析纳入介入组 1,037 例事件与对照组 1,054 例事件）：感觉异常之相对风险显著降低（0.09，95% CI 0.03 至 0.25，P < .001，I2 为 0%）；感染风险（P = .370，I2 为 56%）与干槽症风险（P = .230，I2 为 27%）则无显著降低；异质性与样本数使 GRADE 证据确定性自极低至中度｜来源 #11｜confidence=verified｜basis=peer_reviewed（PMID 40562625，系统性回顾与统合分析）｜period=2025；检索日 2026-08-06｜geo: universal｜span:「A significant reduction in the relative risk of paresthesia was observed (0.09 [95% CI: 0.03, 0.25], P < .001) with low heterogeneity (I² = 0%)」「there was no significant reduction in the risk of infection (P = .370, I² = 56%) or dry socket (P = .230, I² = 27%)」「the heterogeneity (I² = 0%-56%) and sample sizes reduced the certainty of the GRADE evidence from very low to moderate」｜caveat：适用范围限于与下颚管接触之下颚智齿，非所有智齿；齿冠切除术保留牙根，后续可能需追踪或再处置，该回顾未涵盖长期追踪结果；本卡不建议任何术式。
• F16｜系统性回顾与统合分析（第三大臼齿拔除对生活品质之影响；自 1,141 篇筛得 13 篇，其中 6 篇进入统合分析；纳入条件包含处置系在局部麻醉下执行；以 Newcastle-Ottawa Scale 评估品质）：以 OHIP-14 量表衡量，术后第一天之分数较术前高出 17.57（95% CI 11.84 至 23.30，I2 为 96%）；结论为对生活品质之负面冲击出现在术后第一天，之后随追踪期下降｜来源 #12｜confidence=verified｜basis=peer_reviewed（PMID 29797177，系统性回顾与统合分析）｜period=2018（检索至 2017-03）；**版本时效已查——2026-08-06 以 `third molar*[tiab] AND quality of life[tiab] AND (systematic review[pt] OR meta-analysis[pt]) AND 2019:2026[dp]` 检索回传 14 笔，经逐笔比对主题后未见同题之更新版系统性回顾｜geo: universal｜span:「besides procedures performed under local anesthesia」「A total of 1141 studies were identified. Of this total, 13 articles were selected in the present systematic review, of which six studies were included in the meta-analysis」「The OHIP-14 mean score on the first postoperative day was 17.57 (95% CI 11.84-23.30, I2 = 96%) higher than the preoperative period」「This systematic review revealed that the highest negative impact on quality of life of individuals submitted to third molar surgery was observed on the first postoperative day, decreasing over the follow-up period」｜caveat：I2 为 96%，研究间差异极大，该分数不得作为个人可预期值**；OHIP-14 为量表分数而非疼痛强度；纳入研究限于局部麻醉下之处置，不涵盖镇静或全身麻醉情境。
• F17｜横断回溯研究（单中心，印尼，2017 至 2019 年下颚智齿手术拔除病例；916 位对象，女性 59%，21 至 30 岁组占 60.9%，复杂级别占 77%）：手术困难度与术后第一天之疼痛、张口受限与感觉异常有显著相关；年龄与术后一周之疼痛、肿胀与张口受限有显著相关；作者建议牙医师留意 51 岁以上与手术复杂度高之病人较易发生较严重之术后并发症｜来源 #13｜confidence=verified｜basis=peer_reviewed（PMID 35027927，横断回溯研究）｜period=2022；检索日 2026-08-06｜geo: universal｜span:「Among 916 respondents, the majority of the sample was females (59%) and the dominant age group (60.9%) was the age group of 21-30 years while the dominant surgical difficulty level was shown by the advanced cases group (77%)」「there was a significant correlation between surgical difficulty level and postoperative complications including pain, trismus, and paresthesia on the first-day assessment. On the other hand, age was significantly related to complications like pain, swelling, and trismus on the first-week assessment」「Dentists should take into consideration that older patients (≥51 years) and patients with complex surgical level are more vulnerable to severe postoperative complications」｜caveat：单中心回溯研究、非随机分派，不能证明因果；与 F18 结论方向不一致，本卡两者并陈且未择一采信。
• F18｜回溯分析（单中心，德国，2023-07 至 2024-07；200 位病人、554 颗阻生智齿；以 30 岁为切点分组，分析下齿槽神经感觉迟钝、口窦交通、舌神经感觉迟钝、术后出血与术后感染）：下齿槽神经感觉迟钝、舌神经感觉迟钝、术后出血与术后感染在两年龄组间无显著差异；作者结论为年龄（以 30 岁为切点）与较高之术后并发症风险无统计上相关，与近期若干出版品相反｜来源 #14｜confidence=verified｜basis=peer_reviewed（PMID 39375233，回溯分析）｜period=2024；检索日 2026-08-06｜geo: universal｜span:「The clinical findings, digital panoramic radiographs and perioperative data of 200 patients (554 impacted third molars) that had been subjected to tooth extraction, from July 2023 until July 2024, were analyzed」「IAN hypesthesia, LN hypesthesia, postoperative bleeding and postoperative infection did not show any significant differences regarding patients' age」「The current findings suggest that age (cut-off 30 years) does not statistically correlate with a higher risk for postoperative complications in impacted third molar surgery in contrast to recent publications」｜caveat：单中心、样本 200 人、切点为 30 岁，与 F17 之 51 岁切点不可直接比较；「未发现显著差异」不等于「已证明无差异」，本卡在正文已标明此区别。本研究分析的是年龄与并发症的关系，摘要未报告「手术困难度与并发症」之相关性，故不得与 F17 的困难度结论合并叙述（本卡初稿曾误写成两份研究皆指出困难度相关，已于反例验阶段更正）。
• F19｜Cochrane 系统性回顾（拔牙后并发症之预防性抗生素；23 项试验、约 3,206 位受试者随机分派、2,583 位纳入分析；16 项评为高偏差风险）：相对于安慰剂，预防性抗生素可能使阻生智齿拔除后之术后感染性并发症风险降低约 66%（RR 0.34，95% CI 0.19 至 0.64；低确定性证据），即平均每治疗 19 人（95% CI 15 至 34）可避免一人发生感染；23 项试验中有 21 项仅纳入接受阻生智齿手术之健康人，无任何研究评估免疫功能低下者之拔牙；结论建议临床医师应依每位病人之临床状况个别评估是否以及何时开立预防性抗生素｜来源 #15｜confidence=verified｜basis=peer_reviewed（PMID 33624847，Cochrane 系统性回顾 CD003811.pub3）｜period=2021（检索至 2020-04-16）；版本链已查——2026-08-06 以 `CD003811` 检索回传 2 笔（23152221／33624847），本篇为现行版；pubtype 无 Retracted Publication｜geo: universal｜span:「We included 23 trials that randomised approximately 3206 participants (2583 analysed) to prophylactic antibiotics or placebo」「which means that 19 people (95% CI 15 to 34) need to be treated with antibiotics to prevent one infection following extraction of impacted wisdom teeth」「None of the studies evaluated tooth extraction in immunocompromised patients」「clinicians should evaluate if and when to prescribe prophylactic antibiotic therapy before a dental extraction for each patient on the basis of the patient's clinical conditions」｜caveat：药名与剂量为该回顾比较之研究介入，本卡一律不引用、不建议；证据确定性为低；结果不必然可推及有共病或感染风险较高者。
• F20｜Cochrane 系统性回顾（成人症状性根尖周炎与急性根尖脓疡之全身性抗生素）：临床指引建议此类状况之初始治疗应为以局部手术性措施移除发炎或感染来源，全身性抗生素目前仅建议用于有感染扩散迹象（蜂窝性组织炎、淋巴结侵犯、弥漫性肿胀）或全身性影响（发烧、倦怠）之情形｜来源 #16｜confidence=verified｜basis=peer_reviewed（PMID 38712714，Cochrane 系统性回顾 CD010136.pub4）｜period=2024（检索至 2022-11）；版本链沿用 KM-DENTAL-33 卡之查核（`CD010136` 回传 3 笔，本篇 pub4 为现行版、pubtype 无 Retracted Publication）｜geo: universal｜span:「Clinical guidelines recommend that the first-line treatment for these conditions should be removal of the source of inflammation or infection by local operative measures, and that systemic antibiotics are currently only recommended for situations where there is evidence of spreading infection (cellulitis, lymph node involvement, diffuse swelling) or systemic involvement (fever, malaise)」｜caveat：该回顾之主题为根尖来源之感染，非冠周炎；本卡引其为红旗判准之来源，其感染扩散与全身性影响之描述属医师判断之判准，本卡转为病人可观察并回报之项目，非自我诊断准则；同 KM-DENTAL-33 卡 F15 锚。
• F21｜教科书条目（深颈部感染）：症状常来自对呼吸道、神经或消化道之局部压迫效应，包括颈部肿胀、吞咽困难、发声困难与张口受限；临床表现常伴随发烧、颈部疼痛与呼吸窘迫；宿主因素（免疫功能受抑制状态、共病、外伤、近期器械操作、静脉药物使用）可影响感染之扩散与严重度｜来源 #17｜confidence=verified｜basis=textbook（PMID 30020634，StatPearls 条目）｜period=条目版本 2026-01；检索日 2026-08-06｜geo: universal｜span:「Symptoms often result from local pressure effects on the respiratory, nervous, or gastrointestinal tracts, including neck swelling, dysphagia, dysphonia, and trismus」「often involving fever, neck pain, and respiratory distress」「host factors such as immunocompromised states, comorbid conditions, trauma, recent instrumentation, and intravenous drug use can influence the spread and severity of infections」｜caveat：教科书层级（basis 阶梯之下层）、非系统性回顾；深颈部感染之来源不限牙源性；本卡仅引其症状清单作为红旗依据，未引任何发生率或预后数字；来源未列举之征象本卡不自行增列；同 KM-DENTAL-05／33 卡同锚。
• F22｜《医疗法》第 87 条第 2 项：医学新知或研究报告之发表、病人卫生教育、学术性刊物，未涉及招徕医疗业务者，不视为医疗广告｜来源 #19｜confidence=verified（2026-08-05 实测 200、逐字对得上，跨卡沿用）｜basis=law｜period=现行条文｜geo: TW｜caveat：本卡发布定位依据，属台湾制度，非医学事实；其他地区读者请以所在地规范为准。
• F23［结构性整理］｜证据缺口声明：本站于 2026-08-06 以 PubMed E-utilities 检索「一次拔几颗」之排程问题，下列检索式回传笔数为——①`third molar[tiab] AND number of teeth extracted per session[tiab]` 回传 0 笔；②`bilateral extraction[tiab] AND unilateral extraction[tiab] AND third molar[tiab]` 回传 0 笔；③`simultaneous bilateral extraction[tiab] AND third molar[tiab] AND complication*[tiab]` 回传 0 笔；④`third molar[Title] AND (single visit[Title] OR one visit[Title] OR same session[Title])` 回传 0 笔；⑤`staged removal[tiab] AND third molar[tiab]` 回传 1 笔，经检视为齿冠切除术结果评估（PMID 27656565），与本题排程问题无关。即未取得直接比较「同次拔除多颗」与「分次拔除」之研究，故本卡不提供任何颗数建议、不比较同侧与异侧、不建议任何麻醉方式。另本卡未取得可引用之「同次拔两颗是否使术后不适加倍」之研究，故不作任何倍数陈述｜来源 #20｜confidence=n/a｜basis=editorial_framework｜period=2026-08-06｜geo: universal｜caveat：检索局限于 PubMed 与上列检索式，未取得不等于已被推翻；本栏为编辑性陈述，不得标为待验 claim。

来源清单

取用日期均为 2026-08-06；PubMed 条目均以 E-utilities efetch 取得摘要原文逐字比对，全卡未使用任何取自付费墙全文之逐字引用。

1. Ghaeminia H, Nienhuijs ME, Toedtling V, et al. Surgical removal versus retention for the management of asymptomatic disease-free impacted wisdom teeth. Cochrane Database Syst Rev. 2020;5(5):CD003879. PMID 32368796
2. Hounsome J, Pilkington G, Mahon J, et al. Prophylactic removal of impacted mandibular third molars: a systematic review and economic evaluation. Health Technol Assess. 2020;24(30):1-116. PMID 32589125
3. Revuelta-Cortés P, Cortés-Bretón Brinkmann J, Argandoña-Flores M, et al. Prevalence of distal caries in second molar associated with impacted mandibular third molar and the position and level of impaction: a systematic review and meta-analysis. Clin Oral Investig. 2025;29(1):83. PMID 39853442
4. de Andrade Tutu JS, de Sousa Lopes Cascaes P, Peralta-Mamani M, et al. Cystic and Neoplastic Lesions in Pericoronal Follicles of Asymptomatic Third Molars: A Systematic Review and Meta-Analysis. J Oral Maxillofac Surg. 2026 May 1 (online ahead of print). PMID 42144023
5. Mello FW, Melo G, Kammer PV, Speight PM, Rivero ERC. Prevalence of odontogenic cysts and tumors associated with impacted third molars: A systematic review and meta-analysis. J Craniomaxillofac Surg. 2019;47(6):996-1002. PMID 31005378
6. Alqahtani ND, et al. Retention of Asymptomatic Impacted Third Molars: Effects on Alveolar Bone at the Distal Surface of Second Molars over Time. Diagnostics (Basel). 2025;15(13):1643. PMID 40647642
7. Schmidt J, Kunderova M, Pilbauerova N, Kapitan M. A Review of Evidence-Based Recommendations for Pericoronitis Management and a Systematic Review of Antibiotic Prescribing for Pericoronitis among Dentists. Int J Environ Res Public Health. 2021;18(13):6796. PMID 34202699
8. Bailey E, Kashbour W, Shah N, Worthington HV, Renton TF, Coulthard P. Surgical techniques for the removal of mandibular wisdom teeth. Cochrane Database Syst Rev. 2020;7(7):CD004345. PMID 32712962
9. Kang F, Sah MK, Fei G. Determining the risk relationship associated with inferior alveolar nerve injury following removal of mandibular third molar teeth: A systematic review. J Stomatol Oral Maxillofac Surg. 2020;121(1):63-69. PMID 31476533
10. Bussolar R, et al. Predictive factors in tomographic imaging for inferior alveolar nerve injury during third-molar surgery: A systematic review and meta-analysis. J Am Dent Assoc. 2026 Aug. PMID 41770179
11. Complications in coronectomy procedures for removal of lower third molars in contact with the mandibular canal: systematic review and meta-analysis of clinical trials. Oral Surg Oral Med Oral Pathol Oral Radiol. 2025 Nov. PMID 40562625
12. Vieira WA, et al. Third molar removal and its impact on quality of life: systematic review and meta-analysis. Qual Life Res. 2018;27(10):2477-2489. PMID 29797177
13. Rizqiawan A, et al. Postoperative Complications of Impacted Mandibular Third Molar Extraction Related to Patient's Age and Surgical Difficulty Level: A Cross-Sectional Retrospective Study. Int J Dent. 2022;2022:7239339. PMID 35027927
14. Krüger C, et al. Impacted third molar surgery in older patients-Is patient's age really a risk factor for complications? Clin Oral Investig. 2024;28(10):568. PMID 39375233
15. Lodi G, Azzi L, Varoni EM, et al. Antibiotics to prevent complications following tooth extractions. Cochrane Database Syst Rev. 2021;2(2):CD003811. PMID 33624847
16. Cope AL, Francis N, Wood F, Thompson W, Chestnutt IG. Systemic antibiotics for symptomatic apical periodontitis and acute apical abscess in adults. Cochrane Database Syst Rev. 2024;5(5):CD010136. PMID 38712714
17. Almuqamam M, Gonzalez FJ, Sharma S, Kondamudi NP. Deep Neck Infections. StatPearls. Treasure Island (FL): StatPearls Publishing. PMID 30020634
18. 内部数据：`km-production-queue.html` 三、诊所补题区「智齿一定要拔吗」列（曝光与来源站逐笔可对帐）
19. 医疗法 第 87 条（全国法规资料库）
20. 编辑框架：本站三层分流结构、分母标注原则、排程问题之处理方式与证据缺口声明（无外部来源，标示为结构性整理）

内部引用链

• 拔完之后伤口多久长好、每天会经历什么（本卡不重写术后时程）：拔牙的洞要多久才会长好？（KM-DENTAL-01）
• 拔完多久能吃东西、该吃什么：拔牙后多久能吃东西喝水？该吃什么？（KM-DENTAL-04）
• 拔完多久可以刷牙、可以用牙膏吗：拔牙后多久可以刷牙？可以用牙膏吗？（KM-DENTAL-40）
• 智齿与第三大臼齿在齿列中的位置、第二大臼齿为什么重要：臼齿是哪几颗？第二大臼齿为什么重要？（KM-DENTAL-21）
• 智齿周围已经肿痛时的三级分流与红旗（本卡 F11／F20／F21 与该卡同锚）：牙龈肿痛怎么快速消？什么情况要就医？（KM-DENTAL-05）
• 牙齿本身在痛时的形态分流（本卡 F20／F21 与该卡 F15／F17 同锚）：牙齿痛怎么办？蛀牙痛是什么感觉？（KM-DENTAL-33）

发布闸门提醒：本卡为 draft。四语（zh-Hans／en／ja）未产前不得进 km_entries；地域声明四语版本必齐（global 卡措辞见 ANK-DENTAL-SPEC.md）。本卡为症状分级卡且含红旗判准，依审核链需 GM 第三意见（高风险）。 本卡 topic_id 为 KM-DENTAL-C01（诊所补题序列），km-gate.py 的挂载检查以 `KM-DENTAL-<数字>` 比对主伫列表格，对本卡不会触发，F6 之英国指引立场与经济模型属英国体系脉络，翻译为其他语版时禁改写成读者所在国之制度。