Dental preparation uses a tooth preparation guide custom-made liar fitting with teeth of a patient. The preparation guide includes one or more guide channels for guiding a cutting tool. The preparation guide enables modification of the teeth as planned with high level of precision. A dental prosthesis for installing onto prepared teeth of the patient is provided before preparation of the teeth. The prosthesis includes features that are complementary to the prepared teeth. The prosthesis can be installed immediately after preparing the teeth using the preparation guide. With the high level of accuracy and precision in the preparation of teeth, no modification of the prosthesis would be needed for installation.

Dental preparation uses a tooth preparation guide custom-made liar fitting with teeth of a patient. The preparation guide includes one or more guide channels for guiding a cutting tool. The preparation guide enables modification of the teeth as planned with high level of precision. A dental prosthesis for installing onto prepared teeth of the patient is provided before preparation of the teeth. The prosthesis includes features that are complementary to the prepared teeth. The prosthesis can be installed immediately after preparing the teeth using the preparation guide. With the high level of accuracy and precision in the preparation of teeth, no modification of the prosthesis would be needed for installation.

A method of manufacture of a dental prosthesis is described, comprising using a rotary milling or drilling tool (16) to mill or drill a block (12) of a sintered ceramic material. The use of a tool (16) to mill or drill material from a block (12) of a sintered ceramic material such as lithium silicate or lithium disilicate allows manufacture of a glass ceramic dental prosthesis in a relatively efficient manner.

A dental drill has a main body and a collecting hood. The main body has a first cutting member and a second cutting member, and both of the first cutting member and the second cutting member have a blade on two sides. A drill is formed by the first cutting member and the second cutting member with their respective bottom ends, a top end of the drill connected to a drill shank. The collecting hood has a closed end and a circular wall forming an accepting space in the collecting hood. The closed end having an engaging hole accepting the drill shank, and, a bottom inner face of the closed end has four clefts arranged in a cross shape and four pairs of the scrapers with a scraping section inbetween.

A dental drill has a main body and a collecting hood. The main body has a first cutting member and a second cutting member, and both of the first cutting member and the second cutting member have a blade on two sides. A drill is formed by the first cutting member and the second cutting member with their respective bottom ends, a top end of the drill connected to a drill shank. The collecting hood has a closed end and a circular wall forming an accepting space in the collecting hood. The closed end having an engaging hole accepting the drill shank, and, a bottom inner face of the closed end has four clefts arranged in a cross shape and four pairs of the scrapers with a scraping section inbetween.

An insert assembly, insertable in a handpiece of a medical device, has an insert having an insert metal tang, a ferromagnetic layer in contact with the insert metal tang, a dielectric layer in contact with the ferromagnetic layer, an insert antenna in contact with the dielectric layer, having an insert antenna metal element and configured to receive and transmit electromagnetic fields, and an identification chip operatively connected to the insert antenna and configured to transmit information about the insert assembly. The ferromagnetic layer reduces or cancels attenuation and/or distortion phenomena of an electromagnetic field caused by parasitic effects due to interaction of a transmitted or received electromagnetic field with metal parts of the insert metal tang, liquids present in the insert, and the insert antenna metal element. The ferromagnetic layer dielectric layer and insert antenna form a transceiver device putting the identification chip in communication with a handpiece antenna.

The invention relates to a dental grinding instrument including a shaft and a grinding area arranged on the shaft, wherein the grinding area has a bonding layer and grinding elements including abrasive grains and spheres, and wherein the grinding elements are fixed to the shaft by means of the bonding layer.

A depth stop for a drilling tool to form a hole of predetermined depth. The depth stop includes an interface portion that couples directly to the shank of the osteotome via interlocking spur and groove features. The interface has a cap flange and a tapered skirt. The underside of the cap flange establishes a reference surface for a tubular key that slides onto the tapered skirt and is held there by friction. The skirt is formed with a relief directly under the cap flange to facilitate haptic confirmation of proper connection. Elongated irrigation windows in the key expose a domed transition on the osteotome, thereby facilitating irrigation. The depth stop can be used, optionally, with an alignment jig designed with a precision guide bushing. The guide bushing is semi-cylindrical and terminates with an internal abutment step against which the lower end of the key engages at full depth.

A depth stop for a drilling tool to form a hole of predetermined depth. The depth stop includes an interface portion that couples directly to the shank of the osteotome via interlocking spur and groove features. The interface has a cap flange and a tapered skirt. The underside of the cap flange establishes a reference surface for a tubular key that slides onto the tapered skirt and is held there by friction. The skirt is formed with a relief directly under the cap flange to facilitate haptic confirmation of proper connection. Elongated irrigation windows in the key expose a domed transition on the osteotome, thereby facilitating irrigation. The depth stop can be used, optionally, with an alignment jig designed with a precision guide bushing. The guide bushing is semi-cylindrical and terminates with an internal abutment step against which the lower end of the key engages at full depth.

An inversion maintenance device has a case, an inverting mechanism, and a control system. The case forms an inversion space. The inverting mechanism has an inverting base and multiple adapting modules. The inverting base is pivotally mounted in the inversion space. The adapting modules are mounted on the inverting base. Each of the adapting modules has an adapting port. The inverting base is capable of inverting to make the adapting port face downward and cover the inversion space. Dental handpieces can be mounted on the adapting modules. The control system has a control module and an operation input terminal. The operation input terminal is electrically connected to the control module and is capable of controlling the control module to inject a working fluid with pressure into the dental handpiece via the adapting module.