39 results about "Full Crown" patented technology

The invention discloses a digitalized generation method for a full-crown bridge connector. The digitalized generation method is characterized in that according to different anatomic forms of teeth, three types of cross section panels are predefined, the proper cross section panel is automatically selected according to the type and size of a prosthesis model, the cross section panel is automatically shaped and located, and a skin profiling algorithm is applied to quickly generate a basically correct connector curved surface; a simple and curved surface editing function is designed, the shape ofa boundary curve can be changed by moving a control point of a projection curve or a middle profiling point, and a new mesh curved surface is generated in real time, so as to easily obtain connectorswith different shapes; the change in the strength of the connector is fed back in real time according to the change of the cross section area of the middle part of the connector, so as to provide visual judging basis of the connector for an operator. The digitalized generation method for the full-crown bridge connector can be widely applied to the field of prosthesis of false teeth.

The invention discloses a method for making a color-shielding veneer in an oral crown. Based on a digital optical scanner and denture design software, a color-shielding veneer is produced by using 3D printing technology. The color-shielding veneer uses low-transmittance ceramic materials. Through the design of the veneer range on the digital abutment model, crystallization after the 3D printing technology is completed, it will be placed on the abutment preparation to cover the discolored tooth, and facilitate the restoration of the high-transparency all-ceramic material crown. The veneer made by this method expands the scope of clinical application of high-permeability ceramic materials such as glass ceramics, enhances the strength of the restoration, and improves the patient's experience and satisfaction in seeing a doctor.

The invention relates to a culture method of zelkova serrata container big seedlings and belongs to the technical field of plant cultivation. The culture method comprises the steps of garden selection and land preparation, container selection, substrate preparation, seedlings selection, container planting, water and fertilizer management and the like. Zelkova serrata has a slow growing speed, and thus, aiming at the growth characteristics of the zelkova serrata, the culture method adopts a specific culture management, so that the survival rate can be improved, growth of the zelkova serrata is accelerated, the culture period is shortened, the seedlings are enabled to grow into big trees at an early date and natural resources are effectively protected; root control containers used in the culture method have an effect of promoting growth of lateral roots, are unlikely to damage roots in the transplanting process and are beneficial for improving the survival rate of the big seedling transplantation; moreover, in the transplanting process, the crowns of the seedlings do not need to be cut down, full-crown transplantation can be carried out, the transplanting effect is good and the engineering requirements of any construction period can be met.

The invention discloses a digitalized generation method for pontic of a full crown bridge. According to a gingival model, a gingival end surface model obtained by utilizing implicit surface isometricoffset based on radial basis function has extremely high smoothness, and no wrinkles or local self-intersection occurs. A proper transition gap is arranged between the pontic and the gingiva, so thatit is avoided that food is stuck in teeth and it is also guaranteed that the pontic has a sufficient bearing capacity. According to the position relationship between a standard crown and a gingival end surface, the standard crown is dynamically cut to create a good boundary position relation for transition between the standard crown and the gingival end surface, and the generation quality of transition surfaces is significantly improved. Meanwhile, according to a whole set of standard crowns with regular forms, the method of transition surface generation based on skin subdivision is adopted incombination with particular forms of the standard crowns, the generation efficiency of the transition surfaces is greatly improved, the real-time effect of the pontic can be shown in the edit state,which is beneficial for editing operation in the next step. The digitalized generation method for the pontic of the full crown bridge can be widely used in the field of dental prosthesis.

The invention provides a full crown regenerating method of a defected apple tree form. The method comprises the following steps of: 1, sawing off all the main branches 25-35 days before sprouting in the period of dormancy of apple tree, remaining the central trunk by the height of 1.2-2.7 m, wherein the saw bite of the main branch is close to the central trunk, the saw bite at the top end of the central trunk is at an angle of 45 degrees, and the saw bit is coated with a white emulsion mixed with a broad spectrum bactericide; 2, spraying lime sulfur mixture having a baume degree being 7-10 to the central trunk; 3, removing branch buds sprouting within 1m of the central trunk in the sprouting period; 4, when the new main branches grow up to 25-35cm, opening by an angle of 80-90 degrees, and when the main branches grow up to 60-70cm, selectively remaining 15-30 good main branches and fixing the opening angle in the range of 80-90 degrees by a rope; and selecting a strong, vertical branch as the extension branch of the central trunk at the top end of the central trunk. The full crown regenerating method is simple and feasible; with the method, standard trunk tree form can be obtained in 3 years; full crown regeneration of the tree body and the recovery of tree body growth vigor can be realized; as a result, the yield and the quality level of apples can be obviously improved.

The invention discloses an application of a fibrous strip for preparing a pulp-perforation cracked molar repairing body. A crack of a pulp-perforation cracked molar is located at a dental crown occlusion face along a developmental groove in a mesial and distal direction and is parallel to a tooth long axis. The depth of the crack is 1.0 mm from the pulp perforation position to the cemento-enamel junction in a root direction, and the width of the crack is 0.01-0.10 mm, and the thickness of the fibrous strip is 1.0-1.5 mm, and the width is 2.0-3.0 mm. The fibrous strip is located at a dental crown occlusion face in a direction vertical to the crack, or the fibrous strip is located in a medullary space to form rectangular laying, or the fibrous strip is located in a medullary space to form annular laying. The thickness of the fibrous strip is 1.0-1.5 mm, and the width is 2.0-3.0 mm. The fibrous strip is added in a resin repairing body, can improve stress concentration on the tip of the pulp-perforation tooth crack from a maxillary first premolar in a mesial and distal direction, and can efficiently prevent further development of a full crown lower crack. An excellent effect is obtained by performing annular laying of the fibrous strip in a direction vertical to the crack level in a medullary space.