The embodiment of the present disclosure relates to the technical field of orthodontic, in particular to an extractor, which comprises a grip hook and a dismounting hook, wherein the dismounting hook comprises a hook-shaped member and an elongated member. One end of the elongated member is connected to the grip hook, and the other end of the elongated member is connected to the hook-shaped member. The hook-shaped member is used for hooking a brace, so as to separate the brace from teeth. By the aforesaid way, the extractor hooks the brace, and fingers apply acting force downwards or upwards to enable the brace to be gradually separated from teeth, so that the brace is picked down, and the risk of deformation or breakage during removal of the brace is reduced.

Methods for designing a palatal expander. Methods may include forming a digital model of a palatal region and tooth engagement regions. Methods may include forming attachment regions on buccal sides of the tooth engagement regions, the attachment regions shaped and sized to engage with attachments bonded to a patient's teeth. Methods may also include forming at least one breach region corresponding to a thinned region of the palatal expander that extends anteriorly to posteriorly in the palatal region or an occlusal portion of one or both of the tooth engagement regions. The breach region may be configured to breach or bend when a pulling force is applied to one or both of the tooth engagement regions such that the attachment regions are detached from respective attachments.

Methods for designing and fabricating palatal expanders by modeling expansion of the palatal region based on material properties for one or more regions of a maxillary jaw determined from a cone-beam computed tomography (CBCT) scan of the maxillary jaw and/or internal topological information for the maxillary jaw determined from the CBCT scan. Also described herein are series of palatal expanders having a sequence and configured to be sequentially worn by a patient to expand the patient's palate in which the left maxillary portion and the right maxillary portion are progressively separated relative to each other, and the thickness of the palatal region changes.

A device for removing a dental covering having: (a) an engagement portion, having a first plate portion which is substantially flat, that is configured to contact a portion of the dental covering along only one of a facial side or a lingual side of the dental covering; (b) a load applying portion, connected to the engagement portion and having a second plate portion which is substantially flat, which is adapted to rest upon an adjacent surface relative to the dental covering; and (c) an intermediate portion which is integral with and adjacent to both the engagement portion and the load applying portion; and wherein the first plate portion is parallel to the second plate portion. The device may be a dental covering removal tool which may find particular use in removing dental coverings, such as temporary and permanent crowns.

A device for removing a dental covering having: (a) an engagement portion that is configured to contact a portion of the dental covering along only one of a facial side or a lingual side of the dental covering and receive a prying load applied by an operator; and (b) a load applying portion connected to the engagement portion which is adapted to rest upon an adjacent surface relative to the dental covering and be pivoted upwardly or downwardly by application of the prying load. The device may be a dental covering removal tool which may find particular use in removing dental coverings, such as temporary and permanent crowns.

Embodiments may provide improved techniques for creating custom lingual or labial ceramic orthodontic brackets, and which provides the capability for in-office fabrication of such brackets. For example, a method of manufacturing customized ceramic labial/lingual orthodontic brackets by ceramic slurry-based AM may comprise measuring dentition data of a profile of teeth of a patient, based on the dentition data, creating a three dimensional computer-assisted design (3D CAD) model of the patient's teeth using reverse engineering, and saving the 3D CAD model on a computer, designing a 3D CAD bracket structure model for a single labial or lingual bracket structure, importing data related to the 3D CAD bracket structure model into a ceramic slurry-based AM machine, directly producing the bracket (green part) in the ceramic slurry-based AM machine by layer manufacturing, and processing the brackets in a sintering and debinding oven prior to direct use.

A dental aligner removal tool is a device that facilitates the detachment of removable tooth positioning appliances, specifically clear aligners and other dental appliances, efficiently, safely, and hygienically from the teeth of a patient. The device includes a hook appendage, a lever appendage, an appendage hub, a tool arm, and a tool handle. The hook appendage is used to engage and loosen a top teeth aligner, while the lever appendage is used to engage and loosen a bottom teeth aligner. The appendage hub connects the hook appendage and the lever appendage to the tool arm to form a single structure. Similarly, the tool arm connects the appendage hub to the tool handle. Further, the tool handle enables the user to hold the device securely with two fingers and a thumb while exerting the force necessary to loosen and remove the target teeth aligner.

Embodiments may provide improved techniques for creating custom lingual or labial ceramic orthodontic brackets, and which provides the capability for in-office fabrication of such brackets. For example, a method of manufacturing customized ceramic labial/lingual orthodontic brackets by ceramic slurry-based AM may comprise measuring dentition data of a profile of teeth of a patient, based on the dentition data, creating a three dimensional computer-assisted design (3D CAD) model of the patient's teeth using reverse engineering, and saving the 3D CAD model on a computer, designing a 3D CAD bracket structure model for a single labial or lingual bracket structure, importing data related to the 3D CAD bracket structure model into a ceramic slurry-based AM machine, directly producing the bracket (green part) in the ceramic slurry-based AM machine by layer manufacturing, and processing the brackets in a sintering and debinding oven prior to direct use.