Patients who had their wisdom teeth extracted had improved tasting abilities decades after having the surgery, a new US study has found. The findings—published in Chemical Senses—challenge the notion that removal of wisdom teeth, known as third molars, only has the potential for negative effects on taste, and represent one of the first studies to analyse the long-term effects of extraction on taste.
“Prior studies have only pointed to adverse effects on taste after extraction and it has been generally believed that those effects dissipate over time,” said Dr Richard Doty, director of the Smell and Taste Center at the University of Pennsylvania.
“This new study shows us that taste function can actually slightly improve between the time patients have surgery and up to 20 years later. It’s a surprising but fascinating finding that deserves further investigation to better understand why it’s enhanced and what it may mean clinically.”
Doty and a colleague evaluated data from 1255 patients who had undergone a chemosensory evaluation at Penn’s Smell and Taste Center over the course of 20 years. Among that group, 891 patients had received third molar extractions and 364 had not.
The ‘whole-mouth identification’ test incorporates five different concentrations of sucrose, sodium chloride, citric acid, and caffeine. Each solution is sipped, swished in the mouth, and then spit out. Subjects then indicate whether the solution tastes sweet, salty, sour, or bitter.
The extraction group outperformed the control group for each of the four tastes, and in all cases, women outperformed men. The study suggests, for the first time, that people who have received extractions in the distant past experience, on average, an enhancement (typically a three to 10 per cent improvement) in their ability to taste.
“Further studies are needed to determine the mechanism or mechanisms behind the extraction-related improvement in taste function,” Dr Doty said. “The effects are subtle but may provide insight into how long-term improvement in neural function can result from altering the environment in which nerves propagate.”