The Gap in the Smile: Ritual Tooth Extraction in Ancient China

Chinese historiography has long relied on physical markers to define those living beyond the pale of civilization—many of which were inscribed directly onto the skin and bone.

Alongside reports of tattoos, strange hairstyles, and exotic dress, Chinese sources frequently noted a recurring practice among the peoples of the south: ritual tooth ablation. This custom, which persisted across maritime Asia into the modern era, was treated as an ethnographic oddity by later Chinese writers, particularly given the Confucian emphasis on maintaining the body’s physical integrity.

"When a woman desires a man, she brings him to her father's house... then two front teeth are extracted from the man's mouth and given to the woman, and the same is done for the woman... only then is the marriage consummated."

What is striking is the distinct possibility that this custom, at least within East Asia, actually originated in what is now mainland China, spreading by land and sea toward the southern regions.

The practice emerged alongside the first agricultural communities around the seventh millennium BCE, appearing in both the northern millet-growing regions and the rice-growing heartlands of the lower Yangtze. There is a likely link between the specific patterns of tooth ablation and the broader currents of population migration and agricultural expansion.

As agriculture spread from the Yellow River basin toward the south and west, it carried these unique patterns of extraction—or, in some cases, tooth sharpening and blackening, a tradition later found in Southeast Asia and among the medieval Japanese nobility. The symmetrical removal of upper lateral incisors, for instance, served as a permanent badge of group identity, a rite of passage, or a seal on a marriage alliance.

These migratory routes were not confined to the mainland; they followed the spread of farming across the sea to Taiwan and the Indonesian archipelago. In these regions, a custom that was originally 'Chinese' may have survived into the present day.

The decline of the practice in northern China around the fifth millennium BCE likely reflects a new stage of cultural integration, as disparate agricultural centers coalesced into early state societies and the historical period began in earnest.

The trajectory of tooth ablation—its origins in the Chinese mainland, its migration southward, its domestic decline, and its eventual rebranding as a mark of 'otherness'—offers a compelling study in cultural fluidity. It is also proof that punk isn't dead; it simply crossed the border.