The present invention relates to a blank for dental purposes which has a first and a second layer which, independently of each other, are based on glass, glass-ceramic or ceramic, wherein the first layer and the second layer differ in colour and form a boundary surface, wherein the boundary surface runs obliquely.

Orthodontic brackets and methods for the manufacture of orthodontic brackets including identification marks indicating placement, thickness, or torque.

The present disclosure relates to ornamental indicia carrier and method of producing the same. In some embodiments, the ornamental indicia carrier comprises an ultraviolet light (“UV”) cured ink printed on a thin flexible film and combined with an adhesive layer. The ornamental indicia carrier is capable of enduring the conditions inside the mouth for an extended period of time and can be used in conjunction with a dental appliance.

A dental ultrasonic tool configured to connect to a magnetostrictive or piezoelectric transducer of a dental instrument operating in the frequency range between 18 kHz and 50 kHz. The tool includes a tip and a singular surface marking having a minimum width of 0.5 mm disposed on the tip. The tip includes a distal point as a datum. The singular surface marking is spaced-apart from the distal point of the tip and defines at least one edge. The at least one edge is not coincident with a first flexural node of the tip at an operating frequency of the tip. Dental ultrasonic tip wear measurement tools for measuring the wear on a tip are also provided.

An endodontic file, for manual or motor driven use by an endodontist, includes a color-coded handle, a shank, and a serrated cutting edge. The cutting edge of the endodontic file is side-cutting with pyramidal teeth and ends in a pointed tip. The endodontic file is used manually inside the root canal in an “up and down” axially aligned motion and these pyramidal teeth will provide a ripping action. A second type of endodontic file has a curved cross section and a sharpened tip. with pyramidal teeth lining the edges of curved blade section. A third type of endodontic file has a flat debriding side which tapers to a point; with a series of adjacent 3-D pyramids emerging from this surface for removing loose material or in urging already loosened material from a root canal.

The present invention relates to a process for assessing stress relaxation in a dental arch-appliance orthodontic system. The information about stress relaxation in the clear aligner-arch system helps monitor the orthodontic treatment progress translated in teeth displacements and improve both patient's treatment compliance and timely treatment completion. The present invention relates to the efficacy of clear aligners by measuring or displaying the magnitude of residual stresses in the arch-aligner system. The measured magnitude of residual is indicative of the teeth displacement and the appropriate time to move to the next stage of the aligner treatment plan.

The reinforced ceramic orthodontic bracket is a ceramic bracket reinforced with a metal base. The bracket is bonded to a user's tooth and accepts an alignment wire for adjusting an orientation of the tooth based on forces provided by the alignment wire. A tooth-contacting side of the bracket includes a metal base to counteract the relatively low tensile strength and ductility of the ceramic. An opaque layer is included between the ceramic and metal base for masking the color of the metal so that the bracket blends in with the natural color of the tooth.

Provided are a zirconia sintered body capable of being widely used as a dental material, in particular, a zirconia sintered body capable of being applied to both a dental material for a back tooth and a dental material for a front tooth and a simple and easy method for manufacturing the zirconia sintered body. The method for manufacturing a zirconia sintered body includes a molding step of molding a powder composition that has an yttria content of more than 3% by mole and 5.2% by mole or less and that contains a first zirconia powder having an yttria content of 2% by mole or more and 4% by mole or less and a second zirconia powder having an yttria content of more than 4% by mole and 6% by mole or less to obtain a green body, and a sintering step of sintering the green body to obtain a sintered body.

This disclosure provides polymeric materials comprising polymer crystals, methods and resins for making the same, and objects and appliances made from said polymeric materials. Polymeric materials having polymer crystals provide favorable properties, such as enhanced durability and rigidity. This disclosure also provides polymeric materials comprising a crystalline phase comprising at least one polymer crystal, as well as an amorphous phase comprising at least one amorphous polymer. The crystalline phase can confer rigidity to the polymeric material, while the amorphous phase can confer elasticity and flexibility.

A method of monitoring the degree of fit of an aligner among a series of aligners. First, an aligner in the series of aligners is selected whose fit to a patient's teeth are to be tested. Next the method includes disposing a nontoxic plastic material comprising an ultra violet reactive agent into the selected aligner, setting the patient's teeth into the selected aligner containing the material, and then illuminating the patient's teeth and the selected aligner with ultra violet light to determine the amount of material disposed onto the interior aligner's surfaces by visual inspection. The material disposed therein is then assessed, a good fit being indicated by a low degree of reflected ultra violet light from the disposed material, and a poor fit being indicated by a high degree of reflected ultra violet light from the disposed material.