Provided is a scalable frame for fixing a zirconium oxidized disk used in producing a denture, wherein a material is used to mold a circular ring which defines a diameter and which includes a major circular section, a minor circular section and a resilient structure integrally formed the minor circular section. The minor circular section has a cross-section different from a cross section of the major circular section such that the circular ring is extendable and retractable along the diameter by virtue of the resilient structure so that the circular ring can be sleeved around the zirconium oxidized disk to facilitate fixing the zirconium oxidized disk in a denture carving machine for undergoing tooth carving process.

The present invention provides a zirconia sintered body that excels in both mechanical strength and translucency, and a zirconia molded body and zirconia pre-sintered body capable of providing such a zirconia sintered body, and containing a binder in an amount that assumes a thickness of 10 mm or more. The invention also provides methods of production of these. The present invention relates to a zirconia molded body comprising: a zirconia particle containing 2.0 to 9.0 mol % of yttria relative to the total number of moles of zirconium oxide and yttria, and having an average primary particle diameter of 60 nm or less; a polyol; and a binder, the polyol and the binder satisfying the 10 relational formula X1<Y1<X2<Y2?500? C. (The descriptions of the symbols in the formula are omitted.)

The present disclosure provides curable compositions comprising one or more of photo-polymerizable monomers as reactive diluents, as well as polymeric materials formed from the curable compositions. Further provided herein are methods of producing the compositions and using the same for the fabrication of medical devices, such as orthodontic appliances.

An improved dough-like filler material for use in dental and orthodontic modelling and the manufacturing methods that may be used to produce such improved dough-like filler material.

A harvested botanic offshoot has a first end with a portion thereof stripped of bark forming a botanic cleaning component that is adapted for insertion into a human mouth for dental cleaning. A proximal end of the offshoot can be carved down in size and releasably installed in a socket or internal channel inside a dental cleaning assembly. A motor inside the dental cleaning assembly can vibrate, oscillate or rotate the botanic cleaning component inside a user's mouth. The dental cleaning assembly has an opening arranged to allow at least a portion of the botanic cleaning component to extend outside the body portion of the dental cleaning assembly.

To provide a ceramic mill blank for dental cutting and machining in which cracks or chips are not caused on the outer edge of the ceramic mill blank even if attaching to and detaching from a dental milling machine are repeated and it is possible to machine the vicinity of the outer edge of the ceramic mill blank.

To provide a ceramic mill blank for dental cutting and machining, wherein, the ceramic mill blank for dental cutting and machining comprises a ceramic portion to be cut and machined and one or more seal members, the ceramic portion consists of a ceramic material which is not finally sintered, the ceramic portion has an outer peripheral surface which is engageable with a holding tool, the one or more seal members are provided on the outer peripheral surface of the ceramic portion, and a length of the one or more seal members is 50% or more of a length in a circumferential direction of the outer peripheral surface provided with the one or more seal members.

Aspects of the disclosure relate to methods and systems for providing a unitary shell appliance for use in a course of treatment for a dental patient and being of controlled thickness. The unitary shell appliance may be formed to present cavities configured to receive teeth of one of an upper or lower arch of the patient when the appliance is positioned on the patient. The appliance may be formed to have a first portion engageable with any tooth selected from the arch of the patient on which the appliance is to be positioned and a second portion associated with another tooth of the arch. The appliance may be further formed with a first thickness and a second thickness. A difference between the first and second thicknesses may be used to apply different levels of force to different teeth.

A bone implant for at least partial insertion into a bone and/or cartilage. The bone implant is at least partially formed of a metal alloy of at least about 90 wt % of a solid solution or a rhenium and molybdenum alloy.

Medical instruments, particularly, endodontic instruments with unique limited memory characteristics, and methods for making such instruments. One embodiment includes heat treating an endodontic blank prior to forming a working portion of the endodontic instrument.

Methods for modifying a physical characteristic of finished endodontic instruments made from one or more superelastic alloys is described which include heat treating one or more finished endodontic instruments in a salt bath for a specific time (e.g., from about four hours to about six hours), at a specified temperature (e.g., from about 475 C. to about 550 C.), and preferably at a specified pH range.