Hoya Corporation

Hoya Corporation is a Japanese company manufacturing optical products such as photomasks, photomask blanks and glass magnetic-memory disks, contact lenses and eyeglass lenses using wavefront technology for the health-care market,…

Endoscopically Controlled Apicoectomy

Already 1896, PARTSCH described the use of apicoectomy in the surgical treatment of chronic apical periodontitis. Amputation of the apical third of the root with its ramifications and excochleation of…

Borescopes

Borescopes can be rigid or semirigid. A rigid borescope, also known as rigid endoscope or swing-prism endoscope, is an endoscope that uses a lens system for image transmission. A semirigid…