14 results about "Permanent tooth" patented technology

To provide an image processing apparatus that can more correctly determine a row of teeth having permanent teeth and milk teeth mixed therein.SOLUTION: An image processing apparatus comprises: an acquisition unit that acquires an image of the inside of the oral cavity; an estimation unit that estimates a row of teeth from an image acquired by the acquisition unit by using a learning model that has learned the relationship between the image of the inside of the oral cavity and the row of teeth; and a correction unit that makes a correction on a result of the estimated row of teeth on the basis of a rule related to the order of losing the milk teeth and getting the permanent teeth.SELECTED DRAWING: Figure 4

The invention aims to provide a biodegradable deciduous tooth repairing post-core material and a preparation method thereof. Deciduous tooth caries (Deciduous tooth decay) and residual roots and crowns of deciduous teeth caused by trauma of the deciduous teeth are clinically common symptoms. A clinically common permanent tooth root pipe pile core system affects replacement of deciduous permanent teeth due to non-absorbability and cannot meet the performance requirement for repairing residual roots and crowns of the deciduous teeth. The time limit and performance requirements of clinical application are fully considered. The polylactic acid is subjected to toughening modification by a block polymerization method, so that the toughness and strength of the polylactic acid are improved, and the elasticity modulus of the polylactic acid and the elasticity modulus of deciduous teeth are within the same quantity range. According to the invention, tooth growth-promoting raw materials such as hydroxyapatite are synthesized into the post-core material, so that the post-core material has an obvious effect in the aspects of anti-caries repair. Experiments prove that the product provided by the invention has good biocompatibility, and is degradable and absorbable.

Disclosed is a removable airway appliance for guiding and developing the lower and upper jaws forward. The removable airway appliance may include an anterior acrylic section having a specified amount of the palate / roof of the mouth and lingual side / inside of top front teeth to direct the forces of development, a posterior acrylic section providing retention over the primary / baby molars, expansion screws set at different angles for up / down and side / side growth and development, and clasps for retention in case if permanent teeth are present. On the horizontal axis the screws can be positioned flat at a small angle or at a steeper angle to help direct the direction of growth and development of the upper and lower jawbones, while the side-to-side directs the amount of increased width of the arch.

Embodiments of the present application provide a method and device for determining tooth numbers, obtaining first crown data and second crown data of the same patient in the same treatment stage; determining the tooth number of the second tooth as the tooth number of the first tooth based on the overlapping degree of the crown of the first tooth in the first crown data and the crown of the second tooth in the second crown data, the overlapping degree of the first tooth satisfying a first set threshold; determining the tooth number of any third tooth in the second crown data according to the positional relationship between the crown of the second tooth with the tooth number and the crown of the third tooth; the third tooth is any tooth in the second crown data except the second tooth with the tooth number. By pairing the tooth numbers according to the first crown data and the second crown data, the tooth number of the corresponding permanent tooth in the second crown data and the tooth number of the embedded tooth in the second crown data are determined, thereby improving the efficiency and accuracy of determining the tooth number.

Medical device based on Aloe schweinfurthii (anteriacae) for the preservation and regeneration of living cells, specifically the cells of the periodontal ligaments of an avulsed immature permanent tooth. A medical device based on Aloe schweinfurthii (anteriacae) for the preservation and regeneration of living cells, specifically periodontal ligament cells, from avulsed permanent teeth. The present invention relates to the technical field of preserving living cells, specifically periodontal ligament cells, using concentrations of 5 to 50% of Aloe schweinfurthii mucilaginous gel in avulsed permanent teeth. The invention provides a low-cost preservation method with maximum safety; in fact, studies on its general oral toxicity in rats have shown no organ damage during the study period. This has enabled the development of a medical device for the safe preservation of living periodontal cells from avulsed teeth.

Embodiments of the present invention provide a method and apparatus for determining the tooth number of a tooth. The method comprises: acquiring first dental crown data and second dental crown data of a same patient in at least one treatment stage; on the basis of the degree of overlap between the dental crown of a first tooth in the first dental crown data and the dental crown of a second tooth in the second dental crown data, determining the tooth number of the first tooth having a degree of overlap satisfies a first set threshold as the tooth number of the second tooth; and on the basis of a positional relationship between the dental crown of the second tooth having the tooth number and the dental crown of a third tooth, determining the tooth number of the third tooth, wherein the third tooth is any tooth other than the second tooth having the tooth number in the second dental crown data. By matching the tooth numbers on the basis of the first dental crown data and the second dental crown data, the tooth number of a corresponding permanent tooth in the second dental crown data and the tooth number of an impacted tooth in the second dental crown data are determined, thereby improving the efficiency and accuracy of determining the tooth number of a tooth.

This invention relates to the development of a biodegradable scaffold containing growth factor and antibiotic loaded nanoparticulate systems with the aim of enabling the regeneration of the pulp-dentin complex of immature permanent teeth with necrotic pulp damaged due to infection, trauma, or developmental anomalies.

The present application relates to the technical field of oral image recognition, and discloses a mixed tooth site recognition method for a local oral image, a storage medium and a device. The method comprises the following steps: collecting a clinical local oral image, manually marking tooth site numbers and category information, and forming an original data set; replacing the tooth site numbers of the original data set with corresponding permanent tooth numbers at the same position, deleting the category information, and forming a tooth site marked data set; deleting the tooth site numbers in the original data set, and numerically representing the category information, to form a classification marked data set; training a tooth site recognition model through the tooth site marked data set; training a classification recognition model through the classification marked data set; obtaining an oral image to be recognized, recognizing the tooth site numbers of the teeth in the oral image through the tooth site recognition model, and recognizing the category of the teeth in the oral image through the classification recognition model. The method can improve the stability and accuracy of recognizing the positions of the teeth from a local oral image.

The invention provides a separation and preparation method of dental pulp stem cells. The method comprises the following steps: using dental stem cells (DSC) separated from dental pulp tissues of human permanent teeth or deciduous teeth; obtaining a single-cell suspension through a double-enzyme digestion method; washing the single-cell suspension and the phosphoric acid buffer salt solution with the same volume for three times; carrying out adherent culture on the undigested tissues; culturing in an improved MEM culture medium (MEM-alpha) supplemented with fetal calf serum (FBS) with the volume fraction of 20%, penicillin with the volume fraction of 100 g / ml and streptomycin with the volume fraction of 100 g / ml in an incubator at the temperature of 37 DEG C under the condition of 5% CO2; according to the double-enzyme digestion method, the culture medium is replaced every two days; the culture medium is replaced once every 4-5 days by the tissue adherence method; after 90% confluence is achieved, performing trypsin digestion to harvest adherent cells; under the condition, the content of CD117 positive cells exceeds 96.67%. The dental pulp stem cells obtained by the method do not induce premature differentiation of cells, the cell proliferation speed is greatly increased, more sufficient nutrition is provided for the cells, synthesis of protein is promoted, proliferation of the cells is promoted, and differentiation of the cells is inhibited; the separation speed and the separation effect are improved, and the operation difficulty is also reduced. By utilizing the method disclosed by the invention, a rapid and stable separation method and an efficient amplification system can be established, and the method has a very wide clinical application prospect in the fields of life science and medicine. Along with continuous development of research, hDPSCs can play a greater role in the medical field.

The utility model relates to the technical field of oral cavity training instruments, and discloses an orthodontic appliance helpful for keeping an interdental gap, which comprises a jaw pad, and an upper tooth socket and a lower tooth socket which are oppositely arranged on two sides of the jaw pad, at least one of the upper tooth space and the lower tooth space is provided with a gap maintaining part, the gap maintaining part comprises a first protrusion extending from the jaw pad to the far end, the first protrusion is used for abutting against the tooth side face on the rear side of the interdental space, and a first preset distance is kept between the first protrusion and the tooth on the front side of the interdental space. According to the utility model, a gap between rear teeth can be maintained, and constant tooth germination resistance cannot be caused.

The invention provides a preparation method of an oral three-dimensional occlusion induction type high-angle bone face type appliance, which comprises the following steps: acquiring upper and lower jaw dentition digital models of a child patient, constructing upper and lower jaw tooth digital models of the child patient after occlusion reconstruction of the upper and lower jaws, and then designing a back tooth occlusion relation and a maximum occlusion contact mode after occlusion reconstruction, a design scheme of the invisible tooth socket containing the gap part is obtained, and a design scheme of the flexible filler is constructed. The invisible tooth socket containing the gap part prepared according to the design scheme can be independently used and can also be matched with flexible filler for use. The orthodontic appliance can solve the technical problem that the existing orthodontic appliance is difficult to simultaneously and effectively control the perpendicularity and inclination of front and rear teeth, adjust occlusion induction and tooth uniformity and adjust the inclination of an occlusion plane during deciduous tooth shedding and permanent tooth eruption of a child patient.

A kind of dental appliance is provided with multiple rings for being sleeved in deciduous teeth or permanent teeth and as fixed point, connecting device, traction hook for traction permanent teeth to be corrected, tongue bar for forming with the resistance area of tongue to avoid the forward extension of tongue and fixing hook for being fixed with permanent teeth to be corrected, ring is fixedly connected with the connecting device, traction hook is fixedly connected with at least one ring, tongue bar is fixedly equipped in connecting device and is located in the lingual side of incisor, and fixing hook is buckled with traction hook by connecting piece.The dental appliance forms multiple tension fixed points, corrects permanent teeth to be corrected, improves the force stability of permanent teeth to be corrected, and reduces the stress of other teeth, reduces the risk of deciduous teeth loosening and falling off.Moreover, the dental appliance forms the resistance area of tongue with the tongue bar, avoids the inadvertent forward extension of tongue, and further avoids the bad habits such as tongue extension, licking teeth, sucking fingers and primary tongue spitting, so as to improve the correction effect.

The present disclosure provides a method of treating reversible and irreversible pulpitis and / or manage its associated pain in a primary or permanent tooth. The method comprises administering a therapeutically effective amount of a bioactive agent such as glutaraldehyde at an environment of a pH of about 7.0 to about 9.0 to an adult tooth followed by applying a therapeutically effective amount of a cavity liner or base onto the adult tooth that has been treated with the bioactive agent. A kit and a pharmaceutical composition for the treatment and associated pain management are also provided.

The invention relates to the field of precision diagnosis and treatment evaluation of oral medicine and artificial intelligence crossing in biomedical engineering, in particular to a clinical effect evaluation system of a permanent tooth pulpitis live pulp preservation treatment scheme, which comprises a preoperative evaluation module used for acquiring a preoperative physiological index set and processing the preoperative physiological index set to obtain an evaluation result of the preoperative physiological index set; the preoperative state of pulpitis of permanent teeth is obtained, so that whether a live pulp preservation treatment scheme is implemented for the permanent teeth or not is determined; the preoperative physiological index set comprises MPI, TOI, CMII and MSI; the preoperative state comprises an inflammation state and an activity state of permanent teeth; and the postoperative effect evaluation module is used for acquiring a postoperative physiological index set in at least one time period after the live pulp preservation treatment scheme is finished, and comprehensively evaluating the postoperative physiological index set to obtain the clinical CES of pulpitis. According to the scheme, a full-cycle accurate quantification technology for pulpitis treatment is provided.