By the Numbers
![number of PFMs returned out of 1 million prescribed number of PFMs returned out of 1 million prescribed](/content/glidewell/en/education/chairside-magazine/volume-10-issue-1/by-the-numbers/_jcr_content/root/container/container_467654658/container_1170571169/container/container_copy/image.coreimg.jpeg/1679081231307/cm1001-dental-stats-01.jpeg)
Out of the last 1 million PFMs prescribed, number of PFMs returned to Glidewell Laboratories due to allergic reaction.
Source: Glidewell Laboratories internal data
![Number of crowns returned to glidewell Number of crowns returned to glidewell](/content/glidewell/en/education/chairside-magazine/volume-10-issue-1/by-the-numbers/_jcr_content/root/container/container_467654658/container_1170571169/container/container_copy_copy/image.coreimg.jpeg/1679081310643/cm1001-dental-stats-02.jpeg)
Number of BruxZir® Solid Zirconia and IPS e.max® crowns returned to Glidewell Laboratories due to allergic reaction out of the last 1 million units prescribed.
Source: Glidewell Laboratories internal data
IPS e.max is a registered trademark of Ivoclar Vivadent.
![BioTemps® Provisionals BioTemps® Provisionals](/content/glidewell/en/education/chairside-magazine/volume-10-issue-1/by-the-numbers/_jcr_content/root/container/container_467654658/container_1170571169/container/container_copy_1149617851/image.coreimg.jpeg/1679081376905/cm1001-dental-stats-03.jpeg)
7,000,015
Total number of BioTemps® Provisionals from Glidewell Laboratories prescribed by dentists
Source: Glidewell Laboratories internal data
BioTemps® — We’ll have them there before you even prepare!
![original bristle toothbrush invented in 1498 original bristle toothbrush invented in 1498](/content/glidewell/en/education/chairside-magazine/volume-10-issue-1/by-the-numbers/_jcr_content/root/container/container_467654658/container_1170571169/container/container_copy_430409083/image.coreimg.jpeg/1679081436965/cm1001-dental-stats-04.jpeg)
1498
Year that the bristle toothbrush was invented. The design, crafted in China that year, featured hog hair attached to bamboo or bone.
Source: Library of Congress
![Clear-Lock Retainers Clear-Lock Retainers](/content/glidewell/en/education/chairside-magazine/volume-10-issue-1/by-the-numbers/_jcr_content/root/container/container_467654658/container_1170571169/container/container_copy_1551537996/image.coreimg.jpeg/1679081546155/cm1001-dental-stats-05.jpeg)
30
Number of years Glidewell Laboratories stores a 3D digital model of your patient’s teeth when you prescribe Clear-Lock Retainers for Life™.
Source: Glidewell Laboratories internal data
![map showing the journey of cases for Pennsylvania dentists map showing the journey of cases for Pennsylvania dentists](/content/glidewell/en/education/chairside-magazine/volume-10-issue-1/by-the-numbers/_jcr_content/root/container/container_467654658/container_1170571169/container/container/image.coreimg.jpeg/1679081607242/cm1001-dental-stats-06.jpeg)
2,700
Number of miles one in three Pennsylvania dentists chose to send their cases in 2014.
33 percent of dentists in Pennsylvania used Glidewell Laboratories in Newport Beach, California, in 2014.
Source: Glidewell Laboratories internal data