A Japanese company is taking extracted teeth and deep freezing them so that when the time comes they can be transplanted back into your mouth.
Three Brackets Corp, says Japanese wire nikkei.net, has 1,500 teeth in in the bank - healthy speciments taken out for orthodontic reasons.
And to keep the extracted teeth in tip-top shape, says the wire, the guys are using a similar technique used to preserve tuna.
The tooth fairies create a magnetic field that lets water molecules move about while taking the temperature down to -20 Celsius. When the magnetic field is turned off, the tooth then freezes and damage to the cell is prevented. Finally, the tooth is frozen at around -150 Celsius.
According the report, which you can find here (subscription required), 100 teeth have been transplanted to their owners with a success rate of around 90 percent and with a living periodontal membrane.
The teeth can be stored for 20 years per tooth and for an extra charge they'll be preserved for 40 years. (Pic on front page courtesy of Wikimedia Commons).