No. A wisdom tooth that is healthy, cleanable and causing no problem should be left alone and monitored, and that has been the mainstream position for more than two decades. It is worth saying plainly, because a lot of people arrive at our Canterbury Road rooms already braced for surgery on four teeth that are doing nothing wrong.
Where it gets interesting is the middle ground: the tooth that is not causing pain but is not exactly innocent either. That is the tooth most of this article is about.
What the evidence actually says
The clearest statement comes from the UK’s National Institute for Health and Care Excellence, whose guidance on the extraction of wisdom teeth concluded that surgical removal of impacted third molars should be limited to patients with evidence of pathology, and that routine prophylactic removal of pathology-free impacted third molars should be discontinued. The pathologies it names are specific: unrestorable decay, untreatable pulp or periapical disease, cellulitis, abscess, osteomyelitis, resorption of the tooth or the tooth next to it, fracture, disease of the follicle including cyst or tumour, and teeth in the way of planned surgery.
The Cochrane systematic review on removal versus retention of asymptomatic, disease-free impacted wisdom teeth, last updated in 2020, reached a more uncomfortable conclusion: there is insufficient evidence either way. It did note, with very low certainty, that retaining them may increase the risk of periodontitis around the adjacent second molar over the long term. Its practical recommendation was that decisions be made through shared decision-making, using clinical judgement and the patient’s own values, rather than a rule.
That is an honest position and it is the one we work from. There is no protocol that says four teeth out at 19. There is a tooth, an X-ray, and a conversation.
Wisdom teeth and crowded front teeth
The most common reason people give me for wanting their wisdom teeth out is that they will push the front teeth crooked, or undo orthodontic work.
Multiple systematic reviews have looked for that association and not found a strong one. Late lower incisor crowding correlates far better with continued mandibular growth, tooth-size and arch-size discrepancy, and inadequate retainer wear after braces than with the presence of third molars. Removing healthy wisdom teeth to prevent crowding is not supported by the evidence.
If your lower front teeth have shifted since your braces came off, the answer is almost always the retainer rather than the wisdom teeth. We do not provide orthodontics of any kind at Whitehorse Dental, no braces and no aligners, so retainer questions are best taken back to the orthodontist who treated you.
What genuinely goes wrong when a bad tooth is left
The case for removal, when it exists, rests on damage to the tooth in front, which is a tooth you actually chew with.
Decay on the back of the second molar. A lower wisdom tooth tipped forward into its neighbour creates a contact point below the gum line that no toothbrush, floss or interdental brush can reach. Decay starts on the back surface of the second molar, out of sight, and is often not found until it is deep. This is the one that costs people teeth. Repairing a cavity on the distal surface of a second molar is difficult access work at the best of times, and sometimes the tooth ends up needing root canal treatment or replacement. Losing a second molar to protect a third molar is a poor trade.
A permanent gum pocket. The same anatomy creates a periodontal defect behind the second molar. Once bone is lost there, it does not grow back, and the pocket keeps collecting bacteria. This is what the Cochrane review was pointing at.
Recurrent pericoronitis. Where a gum flap sits over a partly erupted tooth, infection under it tends to recur. Each episode is treatable, but the pattern rarely stops on its own, and it usually flares at the worst possible time. I have written separately about how that presents, including why it often feels like a one-sided sore throat.
Cyst formation. The sac that surrounds a developing tooth can expand into a dentigerous cyst around an unerupted wisdom tooth. It is uncommon, it is usually painless, and it is only found on an X-ray, which is a decent argument for having one taken rather than none.
Resorption of the neighbour’s root. Less common again, but a wisdom tooth pressing against the root of the second molar can slowly dissolve it.
Notice what is not on that list: vague headaches, general jaw tension, and future front-tooth crowding.
The risks on the other side
Removal is not risk-free, and any honest conversation includes this. Lower wisdom tooth roots sit near the inferior alveolar nerve, and surgery carries a small risk of temporary or, rarely, permanent altered sensation in the lip and chin. There is dry socket, bleeding, infection, and a week of restricted opening. Those risks are real, which is precisely why NICE argued against operating on teeth that were not causing trouble. When both columns are close to even, doing nothing is a legitimate clinical decision.
How we actually decide
The assessment is an hour. The first ten to thirty minutes of a comprehensive appointment here is conversation before any instrument comes out, and for wisdom teeth that time is well spent, because what you want out of it changes the answer.
Then imaging. We take an OPG as well as bitewings, because a bitewing shows the crowns of the back teeth and nothing of a buried third molar. On the panoramic film I am looking at four things: the angle of the tooth, whether there is a clear path of eruption left, whether there is decay or bone loss on the back of the second molar, and where the roots sit relative to the nerve canal.
We keep that imaging in Dental4Windows, so an OPG at 18 sits beside one at 21 and you can see whether a tooth is still moving or has settled. Position at one moment is a snapshot. Change over three years is the actual information.
Then it goes one of three ways.
Keep and monitor. The tooth is upright, fully through, cleanable, and the second molar is clean behind it. We review it at recalls and leave it be.
Keep and make cleanable. The tooth is workable but that back corner is not being kept clean. Airflow, our Guided Biofilm Therapy, uses a warm spray of water, air and erythritol powder that reaches under a gum flap and between tight contacts where a brush and a hand scaler cannot. For a good number of patients that, plus a shorter recall interval, is the entire treatment.
Remove it. There is decay on the second molar, a deepening pocket, repeated infection, or the film shows the tooth is heading somewhere unhelpful and will not stop.
Our general approach is to recommend the simplest thing that solves the actual problem. Often that is not surgery.
If it does need to come out
Dr Kerry Chen does all the complex extractions at this practice, including impacted wisdom teeth, in our own chairs on Canterbury Road. Practically, that means an impacted lower tooth is assessed and removed here rather than referred to a third party, from the same OPG, without a second consultation fee and a wait. Happy gas is available in the chair, with oral premedication as an alternative if you would rather arrive already settled. We do not offer general anaesthetic or hospital sedation, and where a case genuinely needs a hospital theatre we will say so.
If your teenager is 17 and the teeth genuinely need to come out, the Child Dental Benefits Schedule covers extractions and also covers inhalation sedation, item 88943, at $77.60. Eligibility runs to age 17 for at least one day in the calendar year, with a cap of $1,158 over two consecutive calendar years, or $1,132 if the child’s window opened in 2025. We bulk bill CDBS, and a bulk-billed CDBS service cannot carry a co-payment. It is worth checking before the birthday rather than after.
The reasonable next step
If nobody has ever looked at your wisdom teeth on a panoramic X-ray, that is the gap worth closing, whether or not anything is hurting. It either gives you a clear reason to act or a documented reason to stop worrying about it.
Read more about how we assess and, where necessary, remove wisdom teeth at our Blackburn practice. If you have been quoted for surgery, the difference between a simple and a surgical extraction explains what you are being charged for, and if the question is whether to do them all in one go, we have covered that too.
Call (03) 8838 8820 or text 0435 025 318. We are at 129A Canterbury Road, Blackburn VIC 3130, with parking on site and Saturday appointments from 9am to 1pm.
Sources: NICE, Guidance on the Extraction of Wisdom Teeth (TA1) · Ghaeminia H et al., Surgical removal versus retention for the management of asymptomatic disease-free impacted wisdom teeth, Cochrane Database of Systematic Reviews, 2020 · Effect of mandibular third molars on crowding of mandibular teeth: a systematic review and meta-analysis