Group Function
Definition
Group function is an occlusal scheme in which several working-side teeth — usually the premolars, sometimes including the canine — remain in contact simultaneously during lateral movement and share the load between them.
This is the opposite of canine guidance, which places the entire load on a single tooth. For it to be physiologic, the non-working side must remain free and out of contact.
Concept Boundary & Misconceptions
Group function is often confused with bilateral balance, but the two are completely different. In bilateral balance, the non-working side is also in contact — a concept mostly applicable to complete dentures, and in natural teeth or fixed restorations, a sign of a problem rather than something desirable.
Another misconception is assuming that wherever group function is seen, treatment must have failed or the teeth are in an abnormal state. But in many healthy adults, as age advances and the canine tip wears slightly, the load of lateral movements gradually spreads across several teeth on its own — this is a natural adaptation of the body, not a sign of disease.
Role in Clinical Decision-Making
When the canine's periodontal support has been reduced — bone loss or canine mobility — spreading the load across several teeth is more logical than placing it all on a single weakened canine. Here the dentist must genuinely decide: leave the patient's existing, stable group function as it is, or intervene to convert it back to canine guidance.
The right decision depends on the actual periodontal status and occlusal stability, not on which scheme was presented as the "more ideal" one in dental school.
The content of this page is intended for the educational use of dentists and dental students.