Abstract: Disclosed are an ampoule-fixing holder for an intraosseous anesthetic solution injection device and an anesthetic solution injection device including the same. The ampoule-fixing holder includes a cylindrical holder body including an open portion formed at the rear end thereof to allow an ampoule containing an anesthetic solution to be inserted thereinto or removed therefrom, a head configured to enable mounting of an injection needle to the front end of the holder body, a rotary body disposed between the head and the holder body to withstand rotational force and an axial load, and a fixing member configured to firmly hold the ampoule inserted into the holder body to effectively transmit rotational force to the ampoule.

Abstract: Disclosed is a dental orthodontic sheet having a composite structure in which different materials are stacked and bound to each other. The composite structure dental orthodontic sheet includes a first sheet layer, a second sheet layer, and an intermediate sheet layer formed between the first sheet layer and the second sheet layer, wherein the intermediate sheet layer includes a mat portion made of a softer material than each of the first sheet layer and the second sheet layer, the mat portion being formed so as to have a mesh structure, and a binding portion configured to allow mesh holes of the mat portion to be filled with materials of the first sheet layer and the second sheet layer such that the first sheet layer and the second sheet layer are bound to each other.

Abstract: The present invention relates to a device for attaching and detaching a handle of a surgical light which is a medical lighting apparatus. The device, in the handle which is inserted into or separated from a surgical light shaft in a female-male coupling manner, comprises: a lock pin which protrudes in the axial direction of the surgical light shaft and is inserted into a lock hole formed on the handle so as to prevent the handle from being separated; a pin spring, supported on the surgical light shaft, for providing elastic force so that the lock pin protrudes to the outside of the surgical light shaft; a separation button which is provided on the outside of the handle and, when an external force for separating the handle from the surgical light shaft is applied, is pushed so as to enable the lock pin to be separated from the lock hole of the handle; and a button support body for supporting the separation button on the handle so that the separation button is movable to a certain degree.

Abstract: Disclosed herein is an instrument for measuring an endodontic length, which measures and indicates the distance from a pointed tip of a cutting tool to a root apex in order to prevent the pointed tip of the cutting tool from going over the root apex when a root canal is perforated by the cutting tool for an endodontic treatment of a root canal of a tooth. The endodontic length measuring instrument is equipped inside a unit chair system installed in a consultation room of a dental clinic and allows a monitor mounted on the unit chair system to display a measurement result of the endodontic length, thereby making a medical treatment of a root canal easy, easily providing a measurement result of the endodontic length to a doctor, and displaying treatment and measurement results of the root canal in various and precise ways.