51 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.

Systems and methods provide for automated, cyclic delivery and evacuation of a treatment or irrigation solution from a tooth root pulp chamber and pulp canals. A manifold has a base member sized and configured to rest on a crown of an instrumented tooth and a top member sized and configured to couple with the base member to define an inlet chamber and an outlet chamber. The distal end of a needle is passed through an opening between the inlet and outlet chambers and extended distally beyond the base member into a pulp canal. The proximal end of the needle includes an opening in fluid communication with the inlet chamber. A solution is transferred from a fluid supply source to the inlet chamber and through the needle into the pulp chamber and pulp canals. The spent solution is evacuated from the pulp chamber and pulp canals through the outlet chamber.

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 three-dimensional computer model of the patient's tooth, including the pulp chamber and root canals, is created by combining at least one grey value image of the tooth and / or surface information about at least part of the intra-orally visible part of the tooth with a statistical, parameterized shape model of each tooth type (upper or lower incisors, canines, pre-molars, molars) as the patient's tooth to be treated. This allows for planning and / or simulation of one or more root canal treatments on the computer model of the patient's tooth and that the dentist or dental specialist is given qualitative and / or quantitative information by the system in order to aid in adequately analyzing the risks related to performing the root canal treatment with the proposed or user-selected endodontic tools.

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.

This invention relates to a negative pressure irrigation system including one or more negative pressure irrigation needles sized for insertion into a canal of a tooth, each needle having a closed distal end and two suction inlet ports located opposite one another immediately proximal to the closed distal end. The needles are placed in communication with a dental vacuum system by way of a suction manifold. An irrigant inlet tube supplies irrigant from a irrigant container into a pulp chamber or a tooth. The irrigant inlet tube may include a tapered end designed to tightly fit into a lateral irrigant supply port previously drilled into the pulp chamber. A light-cure polymer seals the inlet tube and needles when in use.

An apparatus is described, for endodontic treatment, whereby the operations for complete removal of connective, vascular and nervous tissues in the pulp cavity and in the root canals can be automatically carried out by chemical and pharmacological disintegration and by employing suitable enzymatic solutions such as trypsin at various degrees of dilution. The use of positive-displacement pumps guarantees that precise quantities of the chemical substances are used in the stages of emptying, disinfection, washing, drying and final filling of the root canals and of the pulp cavity. Temperature control of the fluids in circulation ensures that reaction times of the chemical substances used can be repeated at each cycle.

Systems and methods for using a liquid jet apparatus for dental treatments are disclosed. In one implementation, the liquid jet apparatus may include a handpiece configured to deliver a high velocity liquid jet to a desired location in the mouth of a patient. The handpiece may include a positioning member having a channel through or along which the jet can propagate. The positioning member may have a distal end portion configured to be at least partially disposed in a pulp cavity, canal space, or opening in the tooth under treatment. During operation, the jet may impact an impingement surface of the distal end portion of the positioning member and be deflected as a spray through one or more openings in the distal end portion. The liquid jet apparatus may be used for root canal treatments.

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.

A pulp chamber locator assists a dentist in performing a root canal procedure. The device includes a generally circular plate and a plurality of struts extending from the plate. The plate has a hole in the vicinity of its center. The device is inserted over a tooth, such that the struts engage the cemento-enamel junction of the tooth. The hole then indicates the proper point of entry for a dental instrument. The device may also include a rotatable indicator for showing the proper angle of entry, to insure that the instrument reaches the pulp chamber of the tooth. The dentist adjusts the position of the indicator, based on information provided by an X-ray or equivalent, and positions the dental instrument so as to be generally parallel with the indicator.

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.

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.

A root canal surgery robot comprises a movable control table, a root canal cleaner and a root canal filler, and automatic root canal surgical treatment for an affected tooth can be achieved under supervision of a doctor. The movable control table is used for receiving instructions of the doctor and controlling automatic operation of the root canal cleaner and the root canal filler. The multifunctional composite root canal cleaner adopts good wave conduction of liquid incompressibility, so that liquid medicines in a pulp chamber and root canal system generates adaptable multi-harmonic horizontal vibration suitable for the shape of a root canal, the pulp chamber of the affected tooth is thoroughly cleaned and disinfected, and root canal filling can be directly performed on the basis. The root canal has a small diameter, a long length and common irregular shapes, the multifunctional composite root canal filler can generate suitable negative pressure in a dental pulp and root canal system,hot gutta-percha is sucked into the root canal by the negative pressure, so that preparation operation of the root canal is omitted, root canal filling quality is improved, and healthy dental tissuescan be furthest protected.

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 discloses a dental pulp stem cell preparation method. The dental pulp stem cell preparation method includes the following steps of: transporting dental pulp, wherein a deciduous tooth isplaced in a sampling bottle, the sampling bottle and a medical ice bag are placed back into a transportation box to be transported back to a laboratory; separating dental pulp stem cells, wherein tweezers are adopted to clamp the crown of the tooth, then, a syringe is used for sucking up normal saline to blow a dental pulp cavity inwards from a fracture surface of the root of the tooth to wash and loosen the dental pulp, and using a broach for taking out the dental pulp; and proliferating and culturing the dental pulp stem cells, wherein a complete culture medium is adopted, a dental pulp precipitate is resuspended and transferred to a 12-well microplate, one broach is used for fixing the dental pulp, barbs on another broach are used for stripping the dental pulp to make the dental pulp become fine pieces, the cells in the dental pulp are released, and then culture is conducted. According to the dental pulp stem cell preparation method, the broach is adopted to strip the agglomerate dental pulp to release the stem cells in the dental pulp, damage caused by using collagenase and the like on the dental pulp stem cells is avoided, damage on the dental pulp stem cells during digestioncan be eliminated, therefore, the extraction success rate of the dental pulp stem cells reaches 100%, and application is simple and convenient.

A dental probe for determining the vitality of a tooth, comprising a light emitter and a light receiver, wherein the light emitter emits light from an emitter surface adapted to be positioned on a hard dental surface of a tooth, wherein the light receiver collects light incident on a receiver surface adapted to be positioned on a hard dental surface of the tooth so that the optical path of the light emitted from the light emitter passes at least through a portion of the pulp chamber of the tooth. The light receiver includes a light shielding spacer member adjacent to the optical path for establishing and maintaining a distance of at least 50 μm between the gum line and the optical path at the receiver surface. The light emitter further a light shielding spacer member adjacent to the optical path for establishing and maintaining a distance between the gum line and the optical path at the emitter surface, wherein the light shielding spacer member establishes and maintains a distance of at least 50 μm between the gum line and the optical path at the emitter surface, and in that an apical-coronal diameter of the light emitter surface and the light receiver surface is at most 1200 μm in the direction normal to the optical path.

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.