Abstract:
PURPOSE: Provided is a dental implant which can prevent invasion of saliva, expand in accordance with the shape of a dental root and be readily manufactured in a simple structure. CONSTITUTION: The dental implant includes an abutment(10), a fixture and an expanding nut(60). The abutment(10) has a head(12) and a neck to support an artificial tooth, a supportive collar(14) projected from the neck at the border between the head(12) and the neck. The head(12) and the neck are formed in one piece. The fixture has a through hole(58). On the top of the through hole(58), a neck receiving part is provided to be contact with the neck. Around the peripheral at the top of the through hole(58), a shoulder(52) is formed to be contact with the supportive collar(14) and a first raised part is formed in the longitudinal direction. The diameter is reduced from the raised part to the bottom of the through hole(58). At least one slit is formed on the side wall of the through hole(58). The fixture has threads(59) to be bound with the expanding nut so that the slit is opened from the raised part.
Abstract:
PURPOSE: Provided are a bioabsorbing nerve conduit comprising, as an active material, toothapatite, polymer material or chitosan, which is a bioabsorbing ceramic, and a method for manufacturing the same. CONSTITUTION: The bioabsorbing nerve conduit consists of tube components or bioabsorbing polymer materials selected from the group consisting of collagen, alginate and ceramic, wherein coating layer is positioned inside the tube. The tube components further comprise polymer material. The ceramic is selected from the group consisting of toothapatite and bio-apatite. The polymer material is at least one selected from the group consisting of PHBV(poly-hydroxybutyrate-co-hydroxyvalerate), polyglycolic acid(PGA), polylactic acid(PLA), PLLA(poly(L-lactic acid)), polylactic-glycolic acid(PLGA), and chitosan.
Abstract:
PURPOSE: Provided is a bioabsorptive ceramic-polymer complex material for tissue engineering with teeth apatite and polymer used which mixes teeth apatite, polymer for tissue engineering and solvent to keep porosity on the surface and section so that it improves humidity absorption rate. CONSTITUTION: The production process of the bioabsorptive ceramic-polymer complex material for tissue engineering with teeth apatite and polymer used comprises the steps of: (i) extracting an inorganic material from teeth of human or animals and crushing them to prepare teeth apatite; (ii) selecting one material from PGA, PLA, PLLA, PLGA, chitosan and PHBV as bioabsorptive polymer; (iii) selecting one solvent from methylene chloride, chloroform, DMSO and week acid; and (iv) mixing 60-90wt% of bioabsorptive polymer and 10-40wt% of teeth apatite under the selected solvent to produce a ceramic-polymer complex material.
Abstract:
PURPOSE: A tooth observation mirror having a luminous body is provided to observe easily a dark portion in a process for diagnosing or treating a tooth by installing the luminous body at a mirror for observing the tooth. CONSTITUTION: A reflective mirror reception bracket(30) is used for receiving a reflective mirror(10). A lower cover(35) is combined with the first combination portion of a lower portion of the reflective mirror reception bracket(30). A body is formed with the reflective mirror reception bracket(30) and the lower cover(35). A handle(50) is combined with the reflective mirror reception bracket(30). The reflective mirror(10) is formed with a circular plate-shaped mirror. The first combination portion is formed at the lower portion of the reflective mirror reception bracket(30). The second combination portion is formed at side portion of the reflective mirror reception bracket(30).
Abstract:
본 발명은 고형으로 성형 가공된 키토산의 골 대체물로서의 신규한 용도 및 골 형성 관련 유전자의 발현에 관한 것이다. 본 발명은 고형으로 성형 가공된 키토산의 구조를 확인하고 생체 적합성, 생분해성 및 골 형성 관련 유전자 발현 양상을 측정하여 골 대체물로서의 적합성을 규명하므로써 골 대체물로서의 새로운 용도를 제공하는 뛰어난 효과가 있다.
Abstract:
PURPOSE: A making method of substitute using animal bones is provided, which can replace damaged bone part of the human body into the new substitute without immune rejection, also reinforces the bones to use as a bone pin, a bone screw and a bone fixing plate. CONSTITUTION: A bone substitute producing method includes the steps of collecting bones by size and part from young healthy animal having no disease after examinations and cleaning, treating the bones in hydrogen peroxide vapor for over 15minutes, in 100% of alcohol or solution of mixing chloroform and methanol more than 24hours, in 0.6N of hydrochloric acid for 6-12hours according to needed parts and situations, treating the bones with Phosphate buffer solution over 30minutes, keeping the bones at -70°C, performing lyophilization more than 24hours at a minimum, sterilizing by using electric beam, EO gas or 25KGy of irradiation, and immersing the bones resulted in a solution with antibiotics before use. Treating bones in hydrogen peroxide for 15minutes and processing lyophilization more than 24hours are the ways of solidifying the bones.