Gum Recession and Orthodontics: Risks, Prevention, and Treatment

What is gum recession and why does it matter?

Gum recession occurs when the gingival margin — the edge of the gum tissue — migrates apically, exposing the root surface of the tooth. Mild recession is common and often aesthetic rather than immediately harmful; more significant recession exposes the sensitive root dentine, increases the risk of root surface caries, and if left unaddressed can eventually threaten the stability of the tooth. Once gum tissue has receded it does not regrow spontaneously; treatment to restore it requires surgical intervention. Identifying patients at higher risk before starting orthodontic treatment is therefore an important part of the assessment process.

Why does thin gum biotype increase recession risk?

A thin periodontal biotype increases recession risk because the gum has little underlying bone support once teeth move beyond the bone envelope. Patients with a thin periodontal biotype — characterised by delicate, translucent gum tissue and a thin underlying buccal (outer) bone plate — are at significantly higher risk of recession during orthodontic tooth movement. When teeth are moved labially (towards the lip) or buccally (towards the cheek) beyond the supporting bone envelope, the thin overlying gum has little to no bone support beneath it and is prone to recession. Teeth moved excessively in these directions — for example lower incisors that are tipped forward, or upper canines being brought through a buccal path — are the most vulnerable sites. Gum thickness can be assessed clinically or with a periodontal probe, and cone beam CT can confirm bone levels if there is diagnostic uncertainty.

How is gum recession monitored during treatment?

Gum levels should be checked at every orthodontic visit, with baseline photographs taken at the start of treatment so any recession can be caught early. Proclination of the lower incisors — tipping them forward — is one of the most common orthodontic movements associated with recession risk. Non-extraction treatment plans that address crowding by expanding the arches or tipping incisors forward should be assessed carefully in thin biotype patients. During active orthodontic treatment, gum levels should be monitored at each visit; most practices will take baseline photographs and note gingival margins at the start of treatment. If progressive recession is noted, treatment mechanics may need to be modified — for example, accepting less incisor proclination, carrying out interproximal reduction to create space without moving teeth so far labially, or pausing treatment to allow gum grafting before continuing.

Should a connective tissue graft be done before or after orthodontics?

Timing depends on the clinical situation: a prophylactic graft is done before orthodontics for high-risk movements, while a restorative graft is usually done after treatment once tooth position is stable. A connective tissue graft (CTG) is the surgical gold standard for treating established recession and for augmenting thin gum tissue prophylactically. Tissue is taken from the palate and placed under a flap at the recipient site to thicken the gum and ideally achieve partial or complete root coverage. The timing relative to orthodontic treatment depends on the clinical situation. A prophylactic graft before orthodontics is indicated when moving a tooth in a direction known to exceed the bone envelope in a patient with a clearly thin biotype. A restorative graft after orthodontics is carried out once the teeth are in their final positions and the retainer is in place. The graft is more predictable when tooth position is stable, so waiting until orthodontics is complete and retained is often preferred unless recession is progressing during treatment.

When should a periodontist be involved in orthodontic treatment?

A periodontist should assess any patient with a history of periodontal disease, existing recession, or a clearly thin biotype before orthodontic treatment begins. Any patient with a history of periodontal disease, significant recession, or a clearly thin biotype should be referred to or assessed by a periodontist before orthodontic treatment begins. Active periodontal disease must be treated and stabilised before braces are placed — moving teeth into inflamed tissues accelerates bone loss. The periodontist will advise on whether prophylactic grafting is indicated, which teeth are at highest risk, and how to sequence any surgical treatment with orthodontic mechanics. Good communication between the orthodontist and periodontist is essential; a shared treatment plan with clear milestones prevents teeth being moved prematurely after grafting.

What should you do if your gums look lower during treatment?

Tell your orthodontist at your next appointment rather than waiting, since early intervention gets far better results than treating established recession later. Plaque-induced gingival inflammation is an independent risk factor for recession alongside thin biotype; together, the two risks compound. Maintaining excellent oral hygiene throughout orthodontic treatment — thorough brushing twice daily with a soft brush, interdental brushing, and regular professional cleaning — reduces inflammation and protects gum levels. If you notice your gums appearing lower around any tooth during treatment, or if teeth feel more sensitive, raise this at your next appointment rather than waiting until the end of treatment. Early intervention — modifying mechanics, increasing monitoring frequency, or referring to a periodontist — is far preferable to managing established recession after debond.

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This guide is for general information only. It is not a diagnosis, treatment plan, or substitute for advice from a registered dentist or orthodontist.