Profile: OrthoExtent specializes in providing products for orthodontic and dental industries. Our products include cheek retractors, impression trays, buccal tubes and burs. Luminus monocrystalline orthodontic sapphire brackets are made with pure monocrystalline sapphire for the highest transparency available. It is nearly invisible and remains clear without any staining from eating or drinking. Plasma silica coating provides for superior sliding in the slots and minimizes bracket fractures.