50 results about "Dental Pulp Cavity" patented technology

The present disclosed subject matter relates to methods and compositions for restoring a diseased or damaged tooth such that infection is inhibited or eliminated and pulp regeneration is facilitated. The disclosed subject matter also includes a composition comprising a physiologically acceptable matrix seeded with pulp cells. The matrix can be capable of being injected into the pulp chamber of a tooth. In some embodiments, the matrix of a composition includes a hydrogel (e.g., collagen, chitosan, alginate, MATRIGEL™, gelatin, JELL-O®, fibrin), a mesh (e.g., polylactide-coglycolide (PLGA) mesh, polylactide (PLA) mesh, or polyglycolide (PGA) mesh, a cross-linked fiber mesh, a nanofiber mesh, a mesh fabric, biodegradable polymer mesh), a microsphere (biodegradable polymer microsphere, a hydrogel microsphere), or a combination of any of the foregoing. In yet other embodiments, the matrix includes a nanofiber, an artificial three-dimensional scaffold material, or a synthetic three-dimensional scaffold material.

An apparatus for endodontic treatment, comprising: a nozzle connected to a fluid source comprising: a tip small enough to be inserted into a pulp chamber of a tooth; an inner geometry which forms a flow parameters including non-axial flow direction of nozzle fluid flowing through the inner geometry such that discharge fluid discharged from the inner geometry increase rotation of root canal fluid within a root canal sufficiently to remove tissue from the root canal.

A system and method for acquiring and sharing in real time video and/or still images with a tooth or tooth root during a dental procedure using an endoscope.

The invention discloses an injectable tissue engineering building method for regenerating dental pulp dentin. The method comprises the following three steps: preparation of an injectable hyaluronic acid gel scaffold material, separation and cultivation of mesenchymal cells of tooth germs, building of cells and injectable scaffold material compounds in different microenvironments, material preparation of implants and histological detection. According to the method disclosed by the invention, the third generation of mesenchymal cells of tooth germs are seed cells for regenerating dentin pulp sample structures by using a tissue engineering method; TGF-beta1 plays a crucial role in building of the dentin pulp sample structures; meanwhile, the hyaluronic acid gel can be an injectable scaffold material and is suitable for injectable dental tissue engineering; the third generation of mesenchymal cells of tooth germs, the TGF-beta1 and the hyaluronic acid gel are combined and injected into an emedullated dental pulp cavity to build the injectable tissue engineering; thus, in situ regeneration of a dentin-pulp complex sample structure can be realized under the micro-trauma condition, and a new possibility is provided for in situ and physiological regeneration of the dentin-pulp complex in clinic.

The invention discloses a dental pulp cavity gum 3D printing composite material preparation method and application thereof. The composite material is prepared from the following ingredients in parts by weight: 20 to 75 parts of a high-molecular polymer, 5 to 30 parts of a blocking agent, 10 to 70 parts of an antibacterial agent, 0 to 10 parts of diffusion oil, 1 to 10 parts of a modifier and 0 to10 parts of an additive. The dental pulp cavity gum disclosed by the invention has the characteristics of good biocompatibility, an appropriate mechanical property, reasonable antibacterial performance, good production processing stability, printing smoothness and the like; the dental pulp cavity gum 3D printing composite material can be widely applied to the field of medicine, especially the technical field of dental care and can be applied to the field of actual application of dental pulp cavity gum and root canals with high individuation degrees and complex structures.

Provided is a removing device for removing root pipe obstruction, comprising a sleeve which is internally provided with a movable groove, and a clamping member arranged inside the movable groove and capable of generating axial displacement relative to the sleeve, wherein one end of the clamping member is formed with a gripping section; the gripping section is provided with a groove hole and at least one open groove, with the open groove being connected with the groove hole; the gripping section forms a diameter-expanding taper shape; and the external diameter of the gripping section is greater than the internal diameter of the sleeve. The removing device utilizes the clamping member to take the foreign matter blocked inside the dental pulp cavity. Moreover, the clamping member can be made to stably clamp the foreign matters via the axial shifting of the sleeve and generate no loosing during the taking-out process. The removing device, with convenient operation, can rapidly remove the foreign matter and be helpful in raising the root canal therapy efficiency.

The invention relates to a degradable hydrogel for regenerating dental pulp and/or dentin. The hydrogel is characterized in that the hydrogel takes a reactant of chitosan and bis (4-formylbenzoic acid) polyethylene glycol ester as a support material, and the hydrogel also contains an epidermal growth factor (EGF) and interleukin-2. The hydrogel has a self-repairing function and can be conveniently injected into a dental pulp cavity to be treated, and repairing cells enter the dental pulp cavity and play a repairing role through the joint synergistic effect of the EGF, the interleukin-2 and the support material, so that diseased dental pulp and dentin are regenerated and repaired.

The invention provides a negative pressure device attached to hard dental tissues. The negative pressure device attached to the hard dental tissues is used for clinically treating odontogenic noninfectious diseases (such as adamantoblastoma and keratocyst) and odontogenic infectious diseases (such as pulpitis, periapical periodontitis, periapical abscess and periapical cyst) and comprises a closing component, a negative pressure machine, a negative pressure measurer, a liquid recoverer and a medicine holder. The negative pressure device, which is a dental negative pressure drainage device, is made of medical polymer materials and metal materials and is small in size and free from obvious foreign matter sense, the closing component can be fixed to the hard dental tissues, and a local negative pressure state is kept through the negative pressure machine, the negative pressure measurer and a negative pressure control valve, so that symptoms such as tissue absorption and tissue pain caused by positive pressure are decreased, and ossification generated by negative pressure is improved; exudation in the dental pulp cavity and the periapical part is drained to be sucked out, secondary pollution to oral microorganisms is avoided, infection risk is reduced, treatment period is shortened greatly and clinical efficacy of related odontogenic disease treatment is improved.

The invention discloses tissue engineering dental pulp based on a digital optical processing printing technology. The tissue engineering dental pulp is composed of hydrogel microspheres loaded with dental pulp mesenchymal stem cells. A 3D printing technology based on digital optical processing is adopted, high-precision dental pulp mesenchymal stem cell carrying microspheres can be rapidly produced, and the activity function of cells is guaranteed on the basis that the form and speed are guaranteed. A microsphere implant with the micron-sized diameter is firstly beneficial to injection treatment, the anatomical form of a root canal is slender, the root tip cannot be completely filled with a preformed tissue structure by using a filling instrument, and the injectable microsphere can be brought to the vicinity of the root tip hole; and secondly, more gaps can be generated among different microspheres, so that a dental pulp cavity can be refilled with blood, and necessary nutrients are provided for regeneration. The proper microsphere size provides convenience for internal cells to ingest nutrient substances, facilitates nutrient substance exchange and waste metabolism of cells and blood, provides a proper microenvironment for cell growth, and promotes dental pulp regeneration to the maximum extent.

The invention discloses a dental pulp cavity approach guide plate for incisors and canines. The dental pulp cavity approach guide plate includes a guide plate body, a guide cylinder is further arranged on the guide plate body, and a center hole is formed in the center of the guide cylinder. In the wall thickness direction of the guide cylinder, a second groove body penetrating through the side wall of the guide cylinder is further formed in the side wall of the guide cylinder, and one end of the second groove body intersects the side, away from the guide plate body, of the guide cylinder. According to the structural design of the guide plate, performing of the pulp opening operation of dental pulp cavity approach is facilitated, the comfort of patients is improved, and realizing of minimally invasive pulp opening is facilitated.

The invention discloses a dental nerve broach, belongs to a medical instrument, and solves the problems that the rotary angle of the nerve broach is small, the adjusting amplitude is large, the nerve broach easily damages an oral cavity and/or burrs at a needle tip easily stab the oral cavity and the inner wall of a dental pulp cavity. The dental nerve broach comprises a needle wire, a needle sleeve and a screw cap; an arc-shaped needle tip is arranged at one end of the needle wire; a burr region is arranged at the front end of the needle tip; a thread is arranged at the other end of the needle wire; after the needle sleeve is sleeved in a burr region of the needle wire, the front part of the needle sleeve is clamped with the needle wire; the screw cap and the thread on the needle wire are matched to lock the needle wire and the needle sleeve. Burr tips of the burrs of the burr region are concave toward the inner side. According to the nerve broach disclosed by the utility model, the needle tip can rotate for 360 degrees; the dental nerve broach is simple and accurate to operate, has small damages to the oral cavity and is safer to use.

A catheterisation device for preparing and filling a tooth endodontic cavity comprises at least one root canal tool (1) connected to a drive head (10) which is movable by any known means and is characterised in that said root canal tool (1) consist of a base (2) movably driven by the drive head (10) about the reference axis (A) of the base (2), from which a totally or partially eroded, filiform and elastic working part (3) freely extends and whose axis (B) is shifted in a parallel position with respect to the reference axis (A) of the base (2) in such a way that it is placed thereabout.

The invention provides a gum-penetrating system of bioengineered teeth, comprising a bioengineered tooth stent and a gum-penetrating base. The bioengineered tooth stent comprises a stent body, a pulp cavity and a stent base; the pulp cavity is hollow and disposed in the stent body; upper and lower ends of the pulp cavity are connected with upper and lower ends of the stent body; the stent bae is provided with a stent obtuse shoulder and a stent base bonding portion; the stent base bonding portion is fixedly connected with the stent obtuse shoulder which is fixedly connected with the upper end of the stent body; the gum-penetrating base is provided with a crown bonding portion, a crown edge obtuse shoulder and a gum-penetrating base bonding portion; the crown bonding portion is integrally connected with the gum-penetrating base bonding portion through the crown edge obtuse shoulder; the stent obtuse shoulder and the stent base bonding portion are integrally connected with the gum-penetrating base by bonding. The system is good for regeneration of complete root including pulp tissues and periodontal tissues, and good basis is laid for final chewing ability and attractiveness of regenerated teeth.

The invention provides an advanced modular model for training dental operation hand feeling, which comprises a model main body, a simulated enamel layer, a dentin layer, a dental pulp cavity layer and a transparent back plate layer from top to bottom in sequence, and is characterized in that the model main body is provided with a Sudoku structure; a linear training structure, a cross-shaped training structure, a circular training structure, a C-shaped training structure, a dovetail-shaped training structure and a circular triangular training structure are arranged on the Sudoku structure, and a blank area and two protruding surface simulation tooth tip form areas are further arranged on the Sudoku structure. The hand fine motion ability of students can be trained step by step, the three-dimensional feeling from the horizontal direction to the vertical direction and from the plane to the inclined plane with the tooth tips can be achieved, the fine feeling of the students applying the high-speed drill point to move in the model in the transverse direction, the longitudinal direction and the arc line under the stable fulcrum can be trained, and the fine feeling of gradually abrading and cutting different tissues of the tooth body and falling in the marrow penetrating process can be trained; therefore, the hand stability and flexibility of the student can be trained.

The invention discloses a dental pulp cavity paste filling apparatus which comprises an injection syringe and a filling needle. The filling needle comprises a positioning trocar and an injection needle, a positioning trocar bed and an injection needle bed are mounted at the bottom of the positioning trocar and the bottom of the injection needle, the positioning trocar is communicated with the inside of the positioning trocar bed, the injection needle is communicated with the inside of the injection needle bed, and a three-edged needle head is arranged at the head end of the positioning trocar; paste outlets are formed in the outer wall of the head end of the positioning trocar, the injection needle is movably inserted into the positioning trocar, and a sealing plug is mounted at the head end of the injection needle bed. The dental pulp cavity paste filling apparatus has the advantages that the dental pulp cavity paste filling apparatus is reasonable in structure and convenient to use; connection gaps between the positioning trocar bed and the injection needle bed can be plugged by the sealing plug, and accordingly paste can be prevented from flowing out; a limit sleeve can rotate and can linearly move on a threaded tube, accordingly, limit effects of the limit sleeve can be adjusted, and the insertion depths can be accurately controlled.

A two-liquid root canal irrigation method and an irrigation syringe, which are composed of a liquid supply device 1 , an irrigation pipeline 2 , and a neutralization pipeline 3 . The method of flushing with two liquids at the same time is adopted: while flushing the root canal of the affected tooth with flushing medicine, neutralizing medicine (such as normal saline) is used for flushing around the root canal opening (pulp cavity, tooth and around the tooth). When the flushing medicine inside flows out, it will be neutralized or diluted by the surrounding neutralizing medicine. If sodium hypochlorite is used in the root canal, 3% hydrogen peroxide, a neutralizing drug, can also be used around the root canal. Sodium hypochlorite will chemically react with hydrogen peroxide to generate salt and water. This will not affect the effective use of irrigation drugs in the root canal, but also protect the health of the patient's oral tissue. The invention has the advantages of simple structure, convenient operation and low cost, relieves the irritation and taste of washing drugs, and embodies the humanistic care of medical workers.