Do wisdom teeth always need to be removed? Can two be removed in one visit?

Do wisdom teeth always need to be removed? Can two be removed in one visit?

Direct answer

Neither always remove nor always retain. For an asymptomatic, disease-free impacted wisdom tooth, evidence cannot decide removal versus retention; retaining it means regular follow-up [F3]. There is no universal answer to how many teeth to remove at once; a dentist must assess it [F23].

If swelling expands, fever, swallowing difficulty, voice change or respiratory distress occurs, seek medical help immediately and do not wait until the next day [F20][F21].

Scope: this is general health education based on international literature. It does not concern any particular country’s insurance or regulations. The publication note at the end cites Taiwan’s Medical Care Act only to define this site’s publishing status, marked geo: TW in F22.

No single answer applies to everyone

The 2020 Cochrane review directly compares surgical removal with retention and routine care for asymptomatic, disease-free impacted wisdom teeth. It concludes that evidence is insufficient to choose removal or retention. It calls for shared decision-making using patient values and clinical expertise; if retaining, regular clinical assessment is advisable [F3]. Retention may be associated with long-term periodontal risk in the adjacent second molar, but that evidence is very low certainty [F3].

The evidence base is thin: the update still had only a UK hospital RCT and a US prospective cohort, with no eligible health-related-quality-of-life study [F5]. The cohort subgroup was 416 healthy men aged 24 to 84, followed 3 to over 25 years; its periodontal finding must not be extrapolated to women. The RCT randomised 164 and analysed 77 adolescents, was high risk of bias, and found no clinically significant five-year dental-arch effect [F5].

The UK assessment also found comparative evidence very limited. Its then-NICE position was removal when pathological change already exists; that is different from the uncertain situation of no symptoms and no disease [F6][F3]. Later removal of retained teeth ranged from 5.5% to 31.4%, with 1- and 5-year follow-up explaining the range; the source does not match each value to a period, so this card does not claim that longer follow-up raises the percentage [F6]. Its exploratory UK cost model is not a statement about Taiwan, Japan, or the reader’s system [F6].

Three routes: what should happen now?

This is a communication structure, not a diagnostic tool [F2].

Seek medical help immediately

• Expanding swelling, fever, or feeling generally unwell: spreading infection and systemic involvement are clinician-level criteria; “is the swelling continuing to expand?” is a patient-observable way to report concern, not the source’s wording [F20][F2].
• Trouble swallowing, voice change, neck swelling, neck pain, or respiratory distress: these deep-neck-infection features are not a routine-scheduling situation; seek help immediately [F21].
• Trismus: if it comes with expanding swelling, fever, or swallowing difficulty, use this immediate route. Alone without those features, arrange prompt review below and do not keep waiting [F21][F12][F2].
• The same symptoms with immune compromise or comorbidity: host factors can affect spread and severity [F21].

The list is limited to signs named in its sources; absence from this list does not mean a sign is unimportant [F23][F2].

Arrange prompt dental review

Recurrent wisdom-tooth swelling and pain warrant discussion rather than repeatedly suppressing episodes: the review prefers local treatment for pericoronitis and reserves antibiotics for severe conditions [F11]. Pain, swelling, or trismus are among surgical-removal indications, and caries/periodontal destruction in the neighbouring tooth or an imaging lesion is the pathological-change side of the boundary [F12][F6][F3].

No symptoms and no detectable disease

This is the disputed situation: evidence cannot decide removal versus retention; shared decision-making and regular clinical assessment if retaining remain the review’s answer [F3]. Pericoronitis, root resorption, periodontal disease, caries, cysts and tumours are review background, not a self-made follow-up checklist [F4][F2].

Retention risks: numbers and denominators

A 2025 meta-analysis of 13 studies and 13,788 patients found 29.89% distal-caries prevalence (95% CI 21.05% to 38.74%) in second molars next to impacted mandibular wisdom teeth; the mesioangular group was 43.37% (95% CI 33.03% to 53.70%) [F7]. There was no unimpacted control group, so this is neither the effect of extraction nor a personal probability [F7][F2].

In a 51-patient/68-second-molar study with mean age 45 and mean 20-month interval, no significant bone-level change was found while the impacted tooth remained. It found no support for substantial bone-sparing benefit of prophylactic extraction, but is small, single-centre, and short-term [F10].

Do not compare or add cyst/tumour figures. The 2019 review’s 5.3% (95% CI 3.1% to 8.1%) is among extracted impacted teeth; cysts were 4.4% and tumours 0.5%, with selection bias in that denominator [F9]. The narrower 2026 review reports 26.7% cystic change and 21.6% dentigerous cysts, both with I2 >97%, and says evidence does not support prophylactic extraction from these findings alone [F8].

Removal risks

Surgical removal commonly has short-term pain, swelling and trismus; infection, dry socket and trigeminal nerve injury are less common [F12]. Across 23 studies, 26,427 patients and 44,171 teeth, transient inferior-alveolar-nerve deficit was 1.20% and permanent deficit 0.28%. Depth, canal contact, technique, nerve exposure and surgeon experience were statistically significant factors. These pooled figures are not an individual prediction or an assessment of any clinician or facility [F13].

The 2026 imaging meta-analysis reports higher ORs for absent cortical bone (9.87), dumbbell-shaped canal (8.25), lingual position (3.82), and all three together (5.06). ORs are relative, not absolute risks; image interpretation belongs to professionals [F14]. For teeth contacting the canal, coronectomy had paresthesia RR 0.09 but no significant infection/dry-socket reduction; its certainty ranges from very low to moderate, roots remain, and follow-up/further management may be needed [F15].

After removal, day-1 OHIP-14 was 17.57 higher (95% CI 11.84 to 23.30; I2 96%) in a review limited to local anaesthesia; this is a group scale result, not a personal forecast [F16]. The antibiotic review gives low-certainty evidence and NNT 19 (95% CI 15 to 34), but requires individual clinical assessment. This card gives no drug name, dose, or medication advice [F19].

Age and same-session removal

“Remove it while young” is unsettled. One 916-person study linked difficulty to day-1 symptoms and age to week-1 symptoms, flagging age ≥51 and high complexity [F17]. A German 200-patient/554-tooth analysis using a 30-year cut-off found no significant age-group difference in listed complications [F18]. Different cut-offs and populations give different results; the German study did not analyse difficulty with complications, so the findings cannot be merged. This card cannot decide the question for an individual [F3][F17][F18].

The 2026-08-06 PubMed searches in F23 found no direct comparison of same-session multi-tooth removal with staged removal. A dentist must assess each tooth’s depth, canal relation, imaging features, side, anaesthesia/monitoring, health and infection risk, recovery logistics, and possible alternative procedure [F13][F14][F15][F16][F19][F23]. It is unsupported to say two wounds double postoperative discomfort [F16][F23].

Risk factors and questions to ask

Recurrent pericoronitis, neighbouring-tooth caries or periodontal damage, close canal relation on imaging, immune compromise/comorbidity, and retaining without follow-up all need dental assessment [F3][F6][F7][F11][F14][F15][F19][F21]. Ask: for each tooth, removal/retention/observation and why; high-risk imaging features; follow-up interval and checks; current neighbouring-tooth disease; how many teeth now and why; which postoperative situations need early review or same-day care; whether medicines/conditions change the plan; and whether an alternative procedure is worth discussing [F3][F6][F12][F13][F14][F15][F19][F20][F21][F23].

How to find a clinic that provides this service

This site lists no clinics and does not recommend, rate or compare any medical institution.

To find a clinic that provides this service, use the following official lookup channels yourself —

they are maintained by the competent authorities and are more current than any list:

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- The Ministry of Health and Welfare's medical-institution lookup: search by city or county,

township and specialty (dentistry) for institutions that have completed practice registration.

The results show the institution's name, address and registered specialty. This is the first place

to confirm whether a clinic is lawfully registered.

- The National Health Insurance Administration's contracted-institution lookup: check whether a

clinic is under contract with National Health Insurance. This determines which items are covered

and which are self-paid, and therefore what kind of fee explanation you will be given.

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Both systems are on the respective authorities' official websites; searching for the

medical-institution lookup or the contracted-institution lookup will find them. This site does not

reproduce the URLs, because they change; use whichever entry point the authority currently publishes.

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In an emergency, do not spend time looking up lists. If your breathing, swallowing or speech is

affected, or swelling is spreading, go to the nearest emergency department.

Chinese labels to look for on the official pages

These official systems, datasets and files are published in Chinese only. The English names above are this site's renderings; on the page itself you will see the following strings, so search for these:

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- 「醫事機構查詢」

- 「特約醫事機構查詢」

- 「特約院所查詢」

Compliance note

This is patient health education under Article 87 of Taiwan’s Medical Care Act, not medical advertising, and recommends no particular institution [F22]. Surgical removal, coronectomy and retention follow-up have risks and contraindications; pain, swelling, trismus, bleeding, infection, dry socket, altered nerve sensation, or further management may occur. Treatment and outcomes vary by person and require a dentist’s assessment. This framework cannot replace clinical diagnosis and must not be used to delay care or self-medicate. This card gives no drug name, dose, or use advice.

Every clinical statement in this article is mapped line by line to its cited source (see the sources and evidence chain below). It has not been clinically reviewed by a licensed practitioner. This is health information, not individual advice; assessment by a clinician is required.