# T-junction remover
The T-junction remover will repair a certain type of gaps in the geometry where a side of a triangle lies on an open border and is adjacent to two other triangles that also have open borders. It is used by setting the relevant RepairSettings on the ReductionProcessor.
If the T-junction repair distance is larger than the gap then an extra triangle will be created and the gap will be closed. If the gap is zero, an extra triangle will still be created to make the mesh more well-formed and better suited for reduction.
The T-junction remover can be used through the following entry points: