A dental operation-guiding structure includes a bite plate, a marking plate, and at least one connection frame connecting the bite plate and the marking plate. The bite plate is occluded by lower and upper teeth of a human body. The marking plate includes a plate body and at least one window penetrating the plate body. The plate body is adjacent to a tissue surface, and the windows defines a position to be operated. By occluding the dental operation-guiding structure, practical positions, patterns and ranges for the operation can be easily defined. The method for producing the dental operation-guiding structure overlaps a 3D bone image of a target object onto a 3D teeth-mold image thereof to obtain a reconstructed 3D image including clear contours of bones and soft tissues, bases on the reconstructed 3D image to design the dental operation-guiding structure, and finally produces the dental operation-guiding structure by 3D printing.

A dental instrument includes at least one removable or replaceable dental tip. The dental instrument includes a spring actuated collet and collar housed internally within a handle. The handle includes a handle center affixed to a center rod and a grip portion housing the collet and collar and a handle center affixed to a center rod. The center rod is affixed to the collet. The collet includes spring fingers that are biased radially inward by the collar to retain the dental tip. When the grip portion of the handle is rotated about a longitudinal axis of the handle relative to the handle center, camming surfaces associated with the grip portion and the handle center cause translational movement along the longitudinal axis to engage or disengage the collar from the collet.

A dental instrument includes at least one removable or replaceable dental tip. The dental instrument includes a spring actuated collet and collar housed internally within a handle. The handle includes a handle center affixed to a center rod and a grip portion housing the collet and collar and a handle center affixed to a center rod. The center rod is affixed to the collet. The collet includes spring fingers that are biased radially inward by the collar to retain the dental tip. When the grip portion of the handle is rotated about a longitudinal axis of the handle relative to the handle center, camming surfaces associated with the grip portion and the handle center cause translational movement along the longitudinal axis to engage or disengage the collar from the collet.

A method for separating at least two dissimilar materials includes providing an electrode having a contact surface, placing the contact surface in contact with at least one material of the at least two dissimilar materials; and sliding the contact surface across and in contact with the at least one material of the at least two dissimilar materials while applying electrosurgical currents via the contact surface to thereby separate the at least two dissimilar materials.

Extraction instruments and systems for use in revision arthroplasty are provided. The extraction instruments are shaped and configured to fit within the typically tight confines in which revision arthroplasty is performed, and to enhance the surgeon's control over the axis, quantum and speed of the force that is required be applied to disrupt a bone-to-prosthesis bond. This enables completion of a revision arthroplasty to proceed more quickly, and with reduced risk that unwanted movements might cause accidental injury to nearby vital structures.

Extraction instruments and systems for use in revision arthroplasty are provided. The extraction instruments are shaped and configured to fit within the typically tight confines in which revision arthroplasty is performed, and to enhance the surgeon's control over the axis, quantum and speed of the force that is required be applied to disrupt a bone-to-prosthesis bond. This enables completion of a revision arthroplasty to proceed more quickly, and with reduced risk that unwanted movements might cause accidental injury to nearby vital structures.

Disclosed embodiments integrate a camera into an intraoral mirror. Integrating a camera into an intraoral mirror provides an efficient way to record and display what is visible to the healthcare provider in the mirror.

Disclosed embodiments integrate a camera into an intraoral mirror. Integrating a camera into an intraoral mirror provides an efficient way to record and display what is visible to the healthcare provider in the mirror.

A method for assessing the shape of an orthodontic aligner. Acquisition of at least one analysis image at least partially representing the aligner in a service position in which it is worn by a patient. Analysis of the analysis image by means of a deep learning device, trained by means of a learning base, so as to determine a value. For at least one tooth attribute of an analysis tooth zone representing, at least partially, a tooth on the analysis image, the tooth attribute relating to a separation between the tooth represented by the analysis tooth zone, and the aligner represented on the analysis image. For an image attribute of the analysis image, the image attribute relating to a separation between at least one tooth represented on the analysis image, and the aligner represented on the analysis image.

A multi-purpose molar lift oral insertion and double level panorama form designed bristle brush tilter provides a thorough oral cleaning for dental and gums. Described is a small mechanism apparatus designed to assist with brushing teeth and other oral operations, and works especially well for persons that have difficulty with brushing their teeth. The device includes a molar gap tilt lift platform set between the upper molars and the lower molars to cause a gap or space between to upper and bottom jaw. The oral insertion can be enclosed in the mouth. A pivot axle attached to a double level bristle brush can swivels on a shaft pin allowing a user to oscillate or maneuver in left or right directions and up and down with just a touch of the fingertip.