39 results about "Crestal bone" patented technology

A self-positioning and self-starting, tapered thread, orthodontic bone screw (25) for use in intra-oral corrections that serves as a craniomaxillofacial rigid post for orthodontic appliance fixation. The tip of the bone screw incorporates a defined sharp pin-point tack tip (2) to easily pierce the soft tissue and initially penetrate into the host bone for alignment and penetration. In series with the tack tip is a self-tapping, double, tapered thread (11) which allows an orthodontist to insert the bone screw post into the host bone in a single operation without the need for opening or flapping the surrounding soft tissue. As the bone screw penetrates the bone site, the tapered threads (24) allow for easy thread pick-up into the host bone while the increasing outer diameter of the thread (26) rigidly locks into the crestal bone. Once attached and fixated in the host bone, the distal cylindrical dome shaped driver head (12) acts as the fixation post for the anchorage of orthodontic appliances. Incorporated into the cylindrical dome shaped driver head are several attachment features including cross holes (13) and a snap-on undercut groove (19) for attaching orthodontic appliances either individually or simultaneously. The dome shaped head also incorporates a spline driver feature for easy pick-up, assembly and insertion of the screw with a corresponding spline driver tool (27) that allows the screw to be driven with either a standard square or cross slot driver feature.

A multifunctional surgical rotary instrument with a corrosion resistant wear reducing hard coating, to be used in a surgical dental motor driven handpiece for preparing an osteotomy for implant insertion, combining the functions of six surgical instruments is described. The multifunctional surgical rotary instrument has structural features that provide the functions of a crestal bone height reducer, an osteotomy locator, an osteotomy lateral redirector, osteotomy drill, tapered countersink, and an osteocompressor. These structural features include a dual-lobed single plane tip that remains where the drilling is initiated without wandering, and facilitates the precise location of the osseous implant site. Advantageously, the instrument can save time and cost in the implant procedure.

A dental abutment includes a projection for insertion into a cavity in the coronal portion of a dental implant. A coronal surface of the projection is adapted to be substantially flush with a coronal end of the implant when the projection is fully inserted into the cavity. A post extends in a substantially coronal direction from the coronal surface, wherein the perimeter of the post at the coronal surface is smaller than the perimeter of the coronal surface so as to form an indented shelf around the perimeter of the coronal surface.

The invention belongs to the field of biological medicines, and particularly relates to hydroxyl calcium phosphate/aquogel materials which are used as repair and implanting materials for bones or teeth. In order to solve the problems that high bonding interfaces are not formed between tooth implants and dental bones and the like during tooth or bone repair in the prior art, the invention providesnanometer pore hydroxyl calcium phosphate/aquogel materials, which are characterized in that an aquogel surface is modified by polypeptides, and hydroxyl calcium phosphate is deposited on aquogel by the bionic mineralization process. The nanometer pore hydroxyl calcium phosphate/aquogel materials are materials which are highly close to or consistent with materials of human bodies in aspects of macroscopic forms and microstructures and are used for orthopedics and dentistry, are high in biocompatibility, and can be used as repair materials, filling materials and biological support materials for the teeth or the bones.

An artificial tooth is provided that includes a cutting mass brought into hardened condition by light polymerization, a tooth bone mass brought into hardened condition by light polymerization, and a base mass. Those masses bordering one another are intensively interconnected with one another. The process for producing an artificial tooth includes subjecting the cutting mass disposed in a mold to light polymerization, subsequently disposing the tooth bone mass on the first mass while the cutting mass is still disposed in the mold, and subjecting the tooth bone mass to light polymerization with light passed through the mold and the cutting mass disposed in the mold.

The invention discloses an easily-removing implant device and a screwing-out tool thereof. The easily-removing implant device comprises an implant, a base station and a central bolt; the easily-removing implant device is characterized in that the implant comprises a gum-penetrating neck part and a head part, wherein a thread is formed on the outer surface of the head part, at least two spiral self-tapping grooves are also formed in the outer surface of the head part, a connecting hole coaxial with the implant is formed in the implant, the connecting hole comprises a tapered hole, an anti-rotation hole, an implant taking-out section and a blind threaded hole, which are sequentially connected coaxially, the base station comprises a dental crown connecting section and an implant connecting section, the implant connecting section comprises a conical table and an anti-rotation column, a stepped hole matched with the central bolt is formed in the base station, and the central bolt penetrates through the stepped hole to be connected with the blind threaded hole, so that the base station and the implant are fixed integrally. According to the easily-removing implant device, the implant taking-out section with a reverse thread is additionally arranged in the implant, the problem that a part of the implant, which is remained in dentale due to fracture of the implant, is difficult to take out is solved, and the easily-removing implant device has the advantages of simple structure, strong practicability, and the like.

The invention belongs to the field of pharmacy and medical technology and relates to a dentoidin sponginum and a preparation method thereof. The sponginum provided by the invention comprises 80-99wt% of dentoidin and 1-20wt% of collage sponge matrix, wherein the dentoidin is fixed on the collagen sponge through crosslinking in different weight ratios. The sponginum provided by the invention ensures that the dentoidin is filled into ill parts with bone defects, nonunion of bone, bone tissue atrophy, bone fracture, poor bone healing and the like, so that the dentoidin plays roles in inducing bone formation, promoting bone repair and promoting wound convergence.

An endosseous dental implant for guided regeneration of gingival tissue onto the implant and method of producing the same is prepared by coating a region of the implant with biocompatible, random or aligned microfibers or nanofibers to which gingival epithelial and connective tissue cells may become attached. The fibers may be degradable or nondegradable. The extracellular matrix of new connective tissue forms and connects to the implant surface, guided by the nanofibers or microfibers. The coated implant prevents bacterial biofilm formation, which can cause detrimental resorption of crestal bone and lead to implant failure. The implant surface supports improved tissue bonding and provides a cost-effective approach to coating the dental implant surface with biomimetic fibers to enhance gingival or other tissue regeneration directly onto the implant surface.

A tooth impact protection guard incorporates a posterior portion with a labial margin substantially at a contour of an alveolar ridge. The posterior portion extends over an occlusal surface of each posterior tooth and covers the lingual cusps to a posterior lingual margin at the cemento-enamel junction. An anterior portion has a contiguous labial margin with the posterior portion at a contour of the attached alveolar ridge. The anterior portion terminates in an anterior lingual margin substantially adjacent an incisal edge of each anterior tooth with an overlap of between 2 and 5 mm.

The invention relates to a preparation method of a medical porous metal material substituting for a dental bone. The preparation method comprises the steps of mixing tantalum powder, a pore-forming agent and a forming agent to form mixed powder, and further pressing the powder into an organic foam body for forming, degreasing, sintering, cooling and performing heat treatment to prepare a porous tantalum material, wherein the press-forming pressure is 50-100Mpa, the pore-forming agent is one or more of urea, sodium chloride, ethyl cellulose and methyl cellulose, and the forming agent is one or more of stearic acid, zinc stearate, paraffin wax and synthetic rubber. According to the preparation method provided by the invention, tests prove that in the final porous tantalum material, the impurity content can be lower than 0.2%, the density can achieve 11.67-13.34g/cm<3>, the porosity can achieve 20-30%, and the pore diameter can achieve 5-30mu m; the elastic modulus can achieve 4.5-6.0Gpa, the bending strength can achieve 110-130Mpa, and the compressive strength can achieve 100-130Mpa. The porous tantalum material provided by the invention is very suitable for the medical implant material substituting for the dental bone.

A method and system for bone tissue regeneration in association with a predetermined dental bone structure obtains a computerized tomography scan of a dental bone structure on which to regenerate bone tissue. A three-dimensional model digitally represents the dental bone structure. A treatment plan corresponding to said three-dimensional model and a design order permit forming an occlusive barrier for covering the portion of the dental bone structure whereupon to regenerate bone tissue. An occlusive barrier from a biocompatible material and an osteoconductive material form flesh and regenerated bone tissue via osteoconduction. The occlusive barrier includes irrigation channels for permitting flushing of said interior volume and may be formed of pieces printed for forming a volume to regenerate bone tissue. The occlusive barrier may be subjected to a heat treatment for alleviating molecular stress and increasing occlusive barrier ductility and strength. Surface sandblasting treatment forms surface porosity promoting osteoconduction.

A multi-sized dental implant body general spiral pushing structure comprises a dental implant body provided with a basilar part with specific size and diameter. Diameter of the basilar part is gradually narrowing from bottom to top so as to form screw tooth parts, and multiple uniformly-spaced spiral grooves which cooperate with the diameter of the basilar part pass through the screw tooth parts from bottom to top. The spiral grooves cooperate with the screw tooth parts to form multiple spaced cutting ends, and an arc-shaped top end is formed at the top of the dental implant body. The diameter of the basilar part of the dental implant body and the number of the spiral grooves are arranged according to a set ratio. Thus, the dental implant body can be more conveniently spirally pushed and positioned according to different dentale widths and positions while bone meal or a filler is pushed to be sent therein. In addition, implant direction and angle of the dental implant body are more stable and reliable.

The invention relates to a lay down method for model used in detecting cell differentiation function and the method includes the following steps: (1) preparing heelpiece, enamel matrix protein (EMPs) and myeloid stroma cell; (2) covering the heelsurface of the said heelpiece with EMPs; (3) inoculating the myeloid stroma cell on the heelpiece surface obtained by step (2); (4) placing the heelpiece obtained by step (3) into the politef film pocket; (5) placing the heelpiece covered by the pocket under naked mouse skin. The advantages of this invention include connecting the cell culture in vitro and growth in vivo, insulating the impact of naked mouse cell with screen film and inspecting the impact of EMPs to the marrow stroma cell differentiation, which consequently can provide effective research model for studying EMPs application mechanism. At the 8th week of the experiment, different histological structures are formed by different processing groups and the cellular cementum samples are formed on the heelsurface trained by EMPs, which indicates that the EMPs can improve the marrow stroma cell differentiation to the cementoblastoma and also indicates that the research model is successful.

The invention provides a dental implant structure and a preparation method thereof, and relates to the technical field of dental implants. The dental implant structure comprises an implant and an abutment which are connected with each other, the implant comprises an implanting part and a connecting part; the implanting part is made of a ceramic material, a first external thread is arranged on the outer surface of the implanting part, a first connecting hole is formed in the implanting part, and a first internal thread is arranged in the first connecting hole; and the upper part of the connecting part is connected with the abutment, and the lower part is provided with a second external thread connected with the first internal thread. The implanting part and the connecting part are designed to be in threaded connection, and the connection stability is better than that of a welding mode; the ceramic material is adopted as the connecting part of the implant and the dentale, so that the dentale cannot be damaged in the mounting process, and the ceramic has good biocompatibility and can realize better osseointegration with bone tissues, so that the connecting strength with the dentale is improved, and looseness is avoided.

The invention discloses an ultra-low elastic modulus antibacterial medical tantalum alloy which comprises the following components in percentage by mass: 5-20% of titanium, 1-5% of copper and the balance of tantalum. The tantalum alloy is prepared through two steps of mechanical alloying (MA) and spark plasma sintering (SPS). The compressive strength of the tantalum alloy is 700-1200 MPa, the elasticity modulus of the tantalum alloy is 6-15 GPa, the elasticity modulus of the tantalum alloy is matched with a human bone, the defect that a stress shielding effect is generated between an implant and a bone interface after the implant with high elasticity modulus is implanted is overcome, meanwhile, postoperative infection caused by a medical metal tantalum implant is reduced, and the service life of the implant is prolonged; the tantalum alloy has excellent antibacterial performance, corrosion resistance and biocompatibility, the antibacterial rate is increased along with increase of the copper content, the antibacterial rate of escherichia coli can reach 92.6%, and the antibacterial rate of staphylococcus aureus can reach 84.6%. The tantalum alloy is very suitable for being used as a medical implant material of dentale.

The invention discloses an implant tooth bone augmentation multifunctional base and relates to the technical field of dental medical treatment. The implant tooth bone augmentation multifunctional basecomprises a table top, a connecting post and an installing post, wherein the bottom of the table top is fixedly connected with the connecting post; the bottom of the connecting post is fixedly connected with the installing post; and screw threads are arranged on the outer surface of the lower part of the installing post. Through the arrangement of the installing post, the base can be convenientlyarranged on an implant body; meanwhile, the diameter of a table plate is greater than the diameter of the implant body, so that the unexpected falling of the implant body is prevented; the occurrenceof a root bone cavity and maxillary sinus is prevented; through the arrangement of the table top, the table top can be embedded into the existing sclerotin around the neck part of the implant body toachieve the effect of stabilizing the implant body; the auxiliary position fixation can be performed on the implant body; the early-stage stability of the implant body is effectively improved; a space among the inner wall of an outer circular ring, the side wall of a trapezoidal table, the bottom surface of the table plate and the tooth bone can be used for providing a stable space for the peri-implant bone regeneration; and the peri-implant bone regeneration is facilitated.

The invention discloses a dental implant. The dental implant comprises a cylindrical section, a conical section and a tail vertebra section; the conical section is connected with the cylindrical section, and the conicity of the conical section is gradually reduced in the direction away from the cylindrical section; the tail vertebra section is arranged at the end, away from the cylindrical section, of the conical section, the conicity angle formed by the tail vertebra section is greater than that formed by the conical section, and the outer surfaces of the cylindrical section and the conical section are provided with threaded parts. By means of the technical scheme, the contact area with the dental bone is increased, the stability of the dental implant after implanting is improved, and theoverall strength is ensured.

The invention relates to the technical field of oral maxillofacial surgery and orthodontics, and provides a dental bone mixed supporting type external intraoral distraction osteogenesis device and a using method. The dental bone mixed supporting type external intraoral distraction osteogenesis device comprises a retention nail, a traction nail and a traction piece, the retention nail is used for being fixed to the upper end of bone cortex, the traction nail is used for being fixed to a dental surface to be adjusted, the retention nail and the traction nail are connected through the traction piece, and the traction piece is used for providing elastic force for the retention nail to be away from the traction nail. By means of the technical scheme of the dental bone mixed supporting type external intraoral distraction osteogenesis device, the problem that in the prior art, distraction osteogenesis is difficult to operate is solved.

The invention discloses a dentale material with extracorporeal collagen demineralization. The dentale material is based on the size exclusion effect of collagenous fibers, a macromolecular chelating agent is combined with calcium outside the dentin collagenous fibers, mineral crystals outside the collagenous fibers are removed, and the external demineralization dentale material with a unique nano structure and high mechanical strength is obtained. The extrafibrous demineralized dental bone material shows a unique nano-structure formed by endomineralized collagen fibers, has excellent mechanical strength and biocompatibility, can effectively promote adhesion and proliferation of cells, support cell growth, promote osteogenic differentiation of stem cells, and has a good application prospect. And pores left after the mineral substances outside the fibers are removed are beneficial to tissue vascularization and nutrient substance transportation. Therefore, the collagen in-vitro demineralized dental bone material can be used as a tissue engineering scaffold material to be applied to bone tissue regeneration, and has a good biomedical application prospect.

The invention discloses a one-step individually molded dental implant, which comprises a gum former, a gum fixator and a connecting piece which is arranged between the gum former and the gum fixator, wherein the gum former is represented as a hollow tube body; the gum former comprises an integrally molded gum former upper part and an integrally molded gum former lower part; the shape of the molded gum former upper part is adaptive to the shape of a dental crown; the connecting piece comprises an integrally molded connecting piece upper part and an integrally molded connecting piece lower part; the connecting piece upper part is adaptive to the gum former upper part in shape; an outer screw thread is arranged on the outer surface of the connecting piece lower part; an inner screw thread is arranged on the inner surface of the upper end of the gum fixator; and the connecting piece lower part is in threaded connection to the gum fixator. Since the gum fixator, the gum former and the connecting piece are in threaded connection, good connection and fixation can be guaranteed; the gum former is located within a gum, and a new gum body, which gets into good contact with dentale and is prevented from becoming loosening, can be planted around the gum fixator, so that a success rate of dental body implantation is improved.

The present invention discloses a cannabinoid-based composition useful for treating or preventing dental pulp associated diseases. The composition comprises an effective amount of cannabis extract or a derivative thereof or at least one synthetic cannabinoid for the treatment of dental pulp inflammation, pulp infection and/or dental bone defects. The present invention further discloses methods for treating or preventing dental pulp associated diseases.

The invention provides a novel dental implantation method and a corresponding dental implant. The dental implantation method comprises the processes as follows: one or more small holes 1 are drilled in a broken tooth 51 or a dental root 52 or a dentale 53; each thin dental post 2 comprises a lower insertion section 2-1 and an upper helical section 2-2; the insertion section 2-1 of each thin dentalpost 2 is inserted into one small hole 1; each insertion section 2-1 is bonded to an inner wall of the corresponding small hole 1 through an adhesive; the helical section 2-2, outside the small hole1, of each thin dental post 2 is of a straight rod or additional screw rod structure; a filler 4 is injected and bonds the thin dental posts 2 and the broken tooth 51 or the dental root 52 or the dentale 53 bonded to the thin dental posts 2 into a whole to be trimmed into a predetermined shape; and a dental crown 5 is bonded to the filler 4 to complete dental implantation. The novel dental implantation method has the advantages that the novel dental implantation method is a minimally invasive surgery, does not need to pull out the tooth and is small in trauma, small in injury and wide in intended population; and the applicable population of the dental implant can be greatly expanded.