Abstract: A prosthodontic device applicable to the remainder of a root of a tooth that has received complete endodontic therapy includes a post and a core integrally formed with one end of the post. The post has a post body and a connection unit formed on the surface of the post body. The core has a head to sit on the top end of the remainder of the root of the tooth and at least one shoulder formed on the head. The largest diameter of the core is larger than the largest diameter of the post body of the post. The prosthodontic device enables rapid completion of tooth preservation and restoration after endodontic therapy.

Abstract: A bone implant to be disposed between a first bone section and a second bone section is disclosed. The bone implant includes a body structure, a plurality of through-hole structures and an extended channel structure. The body structure has a first end surface to be connected to the first bone section and a second end surface to be connected to the second bone section. The plurality of through-hole structures are disposed in the body structure, pass through the first end surface and the second end surface and have a through-hole axis. The extended channel structure is disposed in the body structure, wherein the extended channel structure enables a new bone section to grow along a direction other than the through-hole axis between the first bone section and the second bone section.

Abstract: An oral positioning device for positioning a breathing tube includes a first teeth guard having a first groove, and a first seat extends from the first teeth guard. The first seat has a first notch. An engaging member has two pivots and a second seat which is engaged with the first seat. The second seat has a second notch which is cooperated with the first notch to form a positioning hole which the breathing tube extends. A second teeth guard has a second groove and two pivotal holes with which the two pivots are pivotably engaged. The first and second seats position the breathing tube in the patient's mouth. The first and second teeth guards protect the patient's teeth from being damaged by of the laryngoscope when opening the patient's mouth.

Abstract: An oral positioning device for positioning a breathing tube includes a first teeth guard having a first groove, and a first seat extends from the first teeth guard. The first seat has a first notch. An engaging member has two pivots and a second seat which is engaged with the first seat. The second seat has a second notch which is cooperated with the first notch to form a positioning hole which the breathing tube extends. A second teeth guard has a second groove and two pivotal holes with which the two pivots are pivotably engaged. The first and second seats position the breathing tube in the patient's mouth. The first and second teeth guards protect the patient's teeth from being damaged by of the laryngoscope when opening the patient's mouth.