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A crystal structure with a point defect typically returns to its ideal localstructure upon moving a few bond lengths away from the defect; topologicaldefects such as dislocations or disclinations also heal rapidly in this regard.Here we describe a simple point defect -- a two-fold atom incorporated at thegrowth edge of a 2D hexagonal honeycomb material -- whose healing may require adefect complex with 50 or more atoms. $\textit{Topologically}$ the two-foldatom disappears into a single 'long bond' between its neighbors, therebyinducing a pentagonal disclination. However, $\textit{chemically}$ thisdisclination occupies as much physical space as a six-fold ring. Thisincompatibility of chemistry and topology can cause a ''ringing'' of theGaussian curvature that creates an expansive healing region and may even spawna semi-infinite grain boundary propagating outwards from the topological scar.

Healing of a Topological Scar: Coordination Defects in a Honeycomb Lattice