30results about How to "Protective function" patented technology

The invention belongs to the technical field of preparation of sea cucumber peptides, relates to preparation of sea cucumber small molecule peptides, and relates to a preparation method of sea cucumber peptides with composite effects of protecting liver and preventing liver cirrhosis, and the sea cucumber peptides with various effects are prepared by using fresh and alive sea cucumbers as raw materials through protease hydrolysis, fishy smell removal, deodorization and other processes. The sea cucumber peptide has the advantages of good solubility, good stability, low viscosity and the like. Compared with the transportation function of amino acid, the sea cucumber active oligopeptide has the characteristics of quick absorption, low consumption and difficulty in saturation, can be added into food, health food, medicine and the like, and has the effects of supplementing nutrition, protecting the liver function, preventing liver cirrhosis, supplementing mineral substances, protein and vitamins and the like.

The invention provides an electric power data transaction risk discovery method, system and device and a medium, and the method comprises the steps: recognizing key nodes in an electric power data traffic panoramic view based on the connectivity of the electric power data traffic panoramic view formed by electric power data traffic through employing a heuristic algorithm based on iteration tabu search; key nodes are monitored, and abnormal data nodes are found by comparing changes of the key nodes; according to the method, through connectivity analysis of the panoramic view of the power data traffic, key nodes in a service link are identified, protection key points are defined, a data transaction source can be quickly and accurately traced when data transaction occurs, and through implementation of the method, the data security can be improved, and the security of the power data traffic is improved. The structure and the function of a service active link are protected, the serious influence of leakage of sensitive data on the service is prevented, and the problems that a panoramic view angle is lacked and a data transaction node is difficult to discover in the existing data transaction tracing process are solved.

The invention discloses a production method of a product with a crop high-temperature-resistant function, and the method comprises the following steps: S1, screening and identifying antioxidant components in a natural plant extract, S2, producing the antioxidant components by using a microbial fermentation technology, and S3, compounding the antioxidant components with trace elements required by crop growth, s4, packaging the compound based on a thermostable carrier material to protect the biological activity of the antioxidant component, and S5, applying the compound to crops to form a layer of protective film on the surfaces of the crops to improve the antioxidant enzyme activity of the crops and reduce cell damage; the production method of the product with the crop high-temperature-resistant function solves the problem that in the prior art, under long-term high-temperature stress, the activity of antioxidant enzymes in crops can be gradually reduced. And along with the continuous high temperature, the balance of an anti-oxidation system may be destroyed, the free radical scavenging rate is reduced, and cells are damaged.

The invention relates to the technical field of soil treatment, in particular to a method for improving the yellow phosphorus contaminated soil treatment efficiency through fuel gas in-situ thermal desorption of high-temperature flue gas. The method comprises the following steps: step 1, grinding the yellow phosphorus polluted soil into slurry; step 2, continuously introducing high-temperature flue gas generated by fuel gas in-situ thermal desorption into the slurry; step 3, conveying the slurry to an atomizer at the top of a combustion tower, atomizing the slurry into small particles by using high-pressure air, and continuously introducing high-temperature flue gas into the bottom of the combustion tower; 4, smoke generated by the combustion tower is absorbed into a scrubber tower, and meanwhile it is guaranteed that the combustion tower is always in negative pressure; 5, the treated slurry is conveyed out from the bottom of the combustion tower. According to the invention, the temperature of the yellow phosphorus slurry is increased by using the fuel gas in-situ thermal desorption high-temperature flue gas, the combustion reaction rate of the yellow phosphorus slurry is increased, and meanwhile, the heat energy loss is also reduced. Through sufficient combustion treatment of yellow phosphorus, thorough treatment of yellow phosphorus polluted soil can be achieved, and no chemical agent needs to be added into the soil in the treatment process.

The invention relates to a wetting liquid formula for improving a sample preservation effect and a preparation method. The wetting liquid formula comprises 15-50% of an anti-aggregation reagent; 5%-10% of a buffer solution; 1%-20% of an ionic strength maintaining reagent; 0.01% to 0.5% of an antimicrobial agent; 0.1%-5% of a mucus dissolving reagent; 0%-0.5% of a cleaning agent and 0.1%-0.5% of penicillanes The content percentage is calculated according to the amount of the prepared 1L solution. The sample conveying time efficiency and stability can be improved, and more flexible sample treatment and sample conveying time can be provided for a user.

The invention discloses a nerve scaffold for targeted delivery of ATPIF1 protein to axonal mitochondria and a preparation method of the nerve scaffold. The nerve scaffold comprises an RVG-TPP-ATPIF1 complex, a liposome microsphere wrapping the RVG-TPP-ATPIF1 complex, and an electrostatic spinning nerve conduit loading the liposome microsphere; wherein the RVG-TPP-ATPIF1 complex is a protein conjugate of rabies virus glycoprotein polypeptide, triphenylphosphine and an ATP (adenosine triphosphate) synthase inhibition factor 1. The nerve scaffold system provided by the invention integrates targeted delivery, controlled release and physical support, and provides a new strategy and method for treatment of peripheral nerve injury.

The invention provides a copper selenide-halloysite-mannose composite drug delivery system which comprises a carrier, the carrier is halloysite nanotubes (HNTs), copper selenide nanoparticles (CuSe) grow on the tube wall of the halloysite nanotubes in situ, and a compound CuSe-coated HNTs is formed; mannose is loaded in a tube cavity of the CuSe-coated HNTs, so that a composite drug delivery system CuSe-coated HNTs-coated ME is formed. The invention further provides a preparation method and application of the copper selenide-halloysite-mannose composite drug delivery system. The drug delivery system can keep stable in a gastric acid environment and directly reach an enteritis part through an oral administration way, so that the enteritis symptom is remarkably relieved.

The invention relates to the technical field of display screen assembly, in particular to automatic assembly equipment for a large-size display screen, which comprises an assembly platform, a placement table is hinged to the top of the assembly platform, a mounting frame is fixedly mounted at the top of the assembly platform, and a rotating cylinder is fixedly mounted at the top of the mounting frame. A rotating plate is rotationally connected to the output end of the rotating air cylinder, an electric push rod is fixedly mounted at the bottom of the rotating plate, a mounting plate is fixedly connected to the output end of the electric push rod, a clamping and fixing mechanism is arranged on the surface of the placing table, and an angle adjusting mechanism is arranged between the assembling platform and the placing table. By starting the motor and the electric push rod, the angle of the placement table and the height of the LED lamp are automatically adjusted, the assembling flexibility and visibility are improved, meanwhile, stable movement of the display screen is ensured through the suction cup and the air pump, damage is reduced, in addition, air is compressed through the air cylinder for dust removal, a clean environment is provided for assembling, and the assembling quality is improved.

The invention belongs to the technical field of pharmacotherapeutics, and particularly relates to application of timosaponin BII in preparation of a medicine for preventing and treating alcoholic liver injury. A novel KEAP1-NRF2 inhibitor-TBII is found through a virtual screening method, TBII and KEAP1 protein have high affinity, and experiments verify that TBII can reduce the protein level of KEAP1 in vivo and improve protein expression of NRF2 and downstream targets NQO1 and GCLC of NRF2. It is proved that TBII can protect the liver function by inhibiting increase of AST and ALT content, oxidative stress and lipid accumulation of the liver are reduced, and TBII has the potential to become a medicine for treating ethanol-induced liver injury.

The utility model provides a flameless relief device which comprises a device shell and an external anti-collision mechanism, the outer side surface of the device shell is fixedly connected with a device rib plate, the outer side surface of the device shell is fixedly connected with an installation base, the outer side surface of the device shell is fixedly connected with a device side plate, and the outer side surface of the device shell is fixedly connected with an anti-collision mechanism. An external anti-collision mechanism is arranged on the surface of the bottom of the device shell, an internal detection mechanism is arranged on the outer side surface of the device side plate, good supporting and buffering protection are provided through the arrangement of the external anti-collision mechanism, a rotating supporting frame and an elastic cushion, when the device is subjected to side face collision, the influence of impact force on the device can be reduced, and the device is more convenient to use. The whole structure and function of the device are protected, the felt pad on the rotating sleeve serves as a buffer layer, the double buffering effect is achieved when the device is impacted, the impact force is effectively reduced, the device can be effectively prevented from being damaged when being impacted, the damage risk of people and objects is reduced, and the safety and reliability of the device are improved.

The utility model discloses a constructional engineering material hoister convenient to move, which comprises a hoister base, a rotating motor and a moving mechanism, the moving mechanism is composed of a sliding sleeve seat, an electromagnetic guide rail, a connecting moving column and a material groove, a screw rod sleeve block is arranged in the sliding sleeve seat, the sliding sleeve seat is fixedly connected with the screw rod sleeve block, and the connecting moving column is fixedly connected with the sliding sleeve seat. And an electromagnetic guide rail is installed on one side of the sliding sleeve seat, a connecting moving column is arranged on the electromagnetic guide rail, the connecting moving column is slidably connected with the electromagnetic guide rail, and the other end of the connecting moving column is fixedly connected with a material groove. By arranging the moving mechanism, the reciprocating screw rod and the rotating table, the height can be flexibly adjusted, the working height of the material elevator can be adjusted according to production requirements, the adaptability to production is high, meanwhile, the conveying requirements of various batches of materials can be met, flexible response can be achieved in a complex production environment, and the production efficiency is improved. The production efficiency is improved.

The application discloses an application of an SIAH2 inhibitor to treating heart failure or improving myocardial cell function, relates to the technical field of medicine, and is used for researching the treatment effect and mechanism of SIAH2 on heart failure. The application provides an application of an SIAH2 gene or protein inhibitor to preparing a heart failure medicine, uses the SIAH2 inhibitor to intervene in a TAC-induced mouse heart failure model, finds that the SIAH2 inhibitor can improve myocardial energy metabolism and protect heart function, and provides a new target and strategy for clinically diagnosing and treating heart failure or improving myocardial cell function.

The invention belongs to the technical field of traditional Chinese medicine fermentation, and particularly relates to aronia melanocarpa fruit fermentation liquor with anti-saccharification and anti-oxidation effects as well as a preparation method and a product of the aronia melanocarpa fruit fermentation liquor. The fermentation liquor is prepared from the following raw materials in parts by weight: 200 to 600 parts of aronia melanocarpa fruit concentrated juice, 100 to 300 parts of cranberry concentrated juice, 30 to 80 parts of phyllanthus emblica, 510 to 80 parts of pleurotus citrinopileatus, 10 to 50 parts of exocarpium citri grandis, 2 to 10 parts of an enzyme preparation and 0.4 to 0.8 part of a leavening agent. In the components, the aronia melanocarpa fruit concentrated juice is used as a main raw material, the cranberry concentrated juice, the phyllanthus emblica, the pleurotus citrinopileatus and the exocarpium are used as auxiliary materials, and the beverage is prepared through fermentation, and has very good anti-oxidation and anti-saccharification effects.

The utility model discloses an anti-impact wheel steel ring, and relates to the technical field of wheel steel rings. The wheel comprises a wheel rim, a supporting inner ring is fixedly installed on the inner wall of the wheel rim, an impact buffering assembly is arranged on the supporting inner ring, the end of the impact buffering assembly is connected with an annular protection plate which is used for protecting the surface of the wheel rim, impact force is buffered and absorbed through the impact buffering assembly, the wheel rim comprises a rim body, and the rim body is fixedly connected with the supporting inner ring. The spoke is fixedly installed on the inner wall of the rim, the supporting inner ring is fixedly installed on the inner wall of the rim, and the hub is fixedly installed at the end of the spoke. The supporting inner ring is used for enhancing the internal supporting structure of the rim and improving the overall strength, the annular protection plate is connected with the impact buffering assembly and used for preventing the surface of the rim from being directly impacted, impact force can be buffered and absorbed through the impact buffering assembly, damage of the impact force to the rim is effectively reduced, and the service life of the rim is prolonged. And the integrity and the functionality of the wheel rim are protected when the wheel rim is impacted.

The invention discloses a Chinese herbal medicine premix feed and a preparation method thereof. The preparation method comprises the following steps: preparing raw materials: preparing a basic dry feed, Chinese herbal medicines and an additive; fermenting the traditional Chinese medicinal materials and mixing the fermented traditional Chinese medicinal materials with other feeds; in conclusion, the preservation and use of the fermented traditional Chinese medicinal material feed enhance the disease resistance: the traditional Chinese medicinal material additive has the effects of enhancing immunity, inhibiting bacteria, expelling parasites and regulating functions. The balance state of the body can be adjusted through various ways or targets, and the immunity and stress state of the animal body can be improved. And the Chinese herbal medicines can also reduce the generation of drug resistance, for example, the mixed extract of ash bark, Chinese pulsatilla root and eucommia ulmoides is added into the daily ration, so that the serum glutathione peroxidase of the sheldrake can be improved, and the oxidation resistance and immune function of the body can be improved. The Chinese herbal medicine additive can promote growth, fatten and gain weight and promote reproduction. For example, active ingredients in the Chinese herbal medicines can stimulate secretion of digestive enzymes of the pigs, improve appetite and promote absorption of nutrient substances, so that growth is accelerated, and the weight is increased.

The invention aims to provide a traditional Chinese medicine composition for treating AIDS (Acquired Immune Deficiency Syndrome). The pharmaceutical composition is prepared by processing the following raw material medicines: astragalus membranaceus, codonopsis pilosula, radix scrophulariae, bran-fried rhizoma atractylodis macrocephalae, Chinese yam, pericarpium citri reticulatae, angelica sinensis, salvia miltiorrhiza, ligusticum wallichii, radix cyathulae, raw liquorice, scorched hawthorn fruit, scorched medicated leaven and scorched malt. Pharmacodynamic tests prove that the medicine can enhance the immune function of AIDS patients, delay the decline speed of CD4 + T cells, activate latent HIV viruses and reservoirs, slow down the disease progress, protect the liver function, relieve clinical symptoms and the like.

The invention provides application of ergothioneine to treatment of retinitis pigmentosa diseases, a model and a medicine. According to the application of the ergothioneine in preparing the food or the medicine for treating the retinitis pigmentosa, the retinitis pigmentosa can be treated, a model for treating the retinitis pigmentosa can be built, and the medicine with the treatment concentration of the ergothioneine can be prepared by utilizing the application. The traditional Chinese medicine composition has the beneficial effects that premature aging of irritable cells can be inhibited, and the retina function is protected.

The utility model discloses a welding cooling device, including support seat, set up the water storage groove on support seat, set up the flow guide spare on support seat, and the cavity that extends to the top is equipped in flow guide spare, and set up the water inlet and overflow port on flow guide spare, and water inlet and overflow port all are linked together with the cavity, and overflow port is linked together with water storage groove. This welding cooling device passes through the structural combination of support seat, water storage groove and is equipped with the flow guide spare of through cavity, has realized the complete cooling path of cooling medium from water inlet, flows through flow guide spare top, and then from overflow port flows to water storage groove. This design makes cooling medium to be able to directly contact welding area, effectively takes away the heat generated in the process of welding, solves the uneven cooling and the problem of low efficiency of traditional indirect type heat dissipation.

The present application relates to a kind of cartilage-like biomimetic double-sided hydrogel and its preparation method and application, belong to biomaterials technical field.The cartilage-like biomimetic double-sided hydrogel of the present application mainly includes ion salt bridge regulation self-assembly I type collagen, doped modified hyaluronic acid and metabolic regulator, wherein ion salt bridge regulation self-assembly I type collagen as main chain is crosslinked with doped modified hyaluronic acid by the combination mediated by covalent interaction, including Michael addition and Schiff base reaction and non-covalent hydrogen bond, the metabolic regulator is loaded in the hydrogel net cavity formed by self-assembly I type collagen and doped modified hyaluronic acid.The main chain of the hydrogel is I type collagen and doped modified hyaluronic acid chain with biocompatibility, biodegradability, gelation is rapid, efficient, and can be used for in situ gelation.By synergistic in situ mechanical metabolic regulation, become the new idea in the clinical management of osteoarthritis.

The invention relates to the technical field of intelligent street lamps, in particular to an intelligent street lamp with a meteorological information acquisition function. The lamp panel is arranged at the upper part of the lamp pole; the bracket is fixedly mounted on the top surface of the lamp pole; the collector is fixedly mounted at one end of the bracket; the rainfall monitor is fixedly mounted in the center of the top surface of the bracket; and the supporting seat is fixedly mounted at one end, far away from the collector, of the bracket. Compared with the prior art, the local wind speed can be monitored in real time through the wind cup, the protection mechanism is automatically triggered when the wind speed exceeds the preset safety threshold value, the mechanism is quick in response, protection measures can be automatically adjusted according to changes of weather conditions, and potential risks of the solar panel in extreme weather are effectively avoided; the use of the protective roller shutter can not only resist the impact of strong wind, but also reduce the collision force of sundries, thereby protecting the integrity and function of the solar panel to the maximum extent.

The utility model discloses a kind of double-row hole oil flinger fuel flow measuring devices, including support frame, outer collector, inner collector. Outer collector is installed in support frame;Inner collector is fixed in outer collector;Outer collector and inner collector are including oil collection end and outlet end, and the oil collection end of outer collector protrudes in the oil collection end of inner collector;Outer collector is close to inner collector, and fuel flow channel is left between the two, double-row hole oil flinger is closely attached to inner collector;The second row hole of double-row hole oil flinger is located in the oil collection end of inner collector, and the first row hole of double-row hole oil flinger is located in the oil collection end of outer collector;Double-row hole oil flinger one end is communicated with hollow shaft. The utility model is compact by modularization design, oil mist is isolated from source, without modification test bed, significantly improve the measurement accuracy and fuel collection rate, and easy to operate, data is reliable.

This invention belongs to the field of genetic engineering technology, and more specifically, relates to a drought-responsive gene in larch trees. LgLEA10 Proteins and their applications. This invention provides a larch drought response gene. LgLEA10 The nucleotide sequence of the protein is shown in SEQ ID NO.1, and the amino acid sequence of the protein it expresses is shown in SEQ ID NO.2. This invention is the first to demonstrate that the Dahurian larch... LgLEA10 The gene is a regulatory gene for the larch's response to drought. This invention demonstrates through experiments that... LgLEA10 Gene overexpression can enhance the drought resistance of larch by significantly increasing the activity of antioxidant enzymes and osmotic regulators. This discovery provides important genetic resources and theoretical basis for breeding new larch varieties with strong drought resistance.

The invention discloses a split solid aluminum alloy conductor power cable, which relates to the technical field of power cables and comprises a cable core, wherein the outer surface of the cable core is sheathed with a shielding layer A; in the invention, the extrusion force exerted on the protective layer is transmitted to the support rod B through the outer support sleeve, and the support rod B will transmit the pressure to the middle support sleeve after being subjected to pressure, and the middle support sleeve will transmit the pressure to the inner support sleeve through the support rod A, at which time the filling blocks A and the filling blocks B will transmit the pressure to the buffer pads A and the buffer pads B after being subjected to pressure, thereby reducing the pressure exerted on the cable core in the process of step-by-step pressure transmission, and when the cable is stretched, the tensile ropes A and the tensile ropes B will bear the stretching force for the cable, thereby preventing it from being excessively deformed during the stretching process, thereby protecting the internal structure and function of the cable, and avoiding the situation where the cable core inside the cable is damaged and needs to be laid again after the cable is laid.

The invention relates to a conjugate formed by an egg yolk antibody and nano chitosan, and a pharmaceutical composition or a feed composition containing the conjugate, the conjugate can improve or eliminate inflammatory response of human or animal bodies, and can regulate intestinal flora so as to play a role in protecting intestinal mechanical barrier and immune barrier functions.

The invention relates to probiotics with an effect of reducing uric acid and application of the probiotics in the field of microorganisms. The probiotic is lactobacillus rhamnosus, is named as CHP003, is preserved in the China General Microbiological Culture Collection Center on December 8, 2022, and has the preservation number of CGMCC (China General Microbiological Culture Collection Center) No.26176. The invention further discloses a preparation method of the probiotic. The lactobacillus rhamnosus CHP003 strain has a plurality of probiotic effects, including reduction of the activity of xanthine oxidase (XOD) and effective reduction of the serum uric acid level of a hyperuricemia model, and provides a new thought and means for treatment and prevention of metabolic diseases such as hyperuricemia, gout and the like.

The invention belongs to the technical field of biology, and particularly relates to a mesenchymal stem cell exosome for overexpressing miR-29 and application of the mesenchymal stem cell exosome. The miR-29 is overexpressed by the mesenchymal stem cells, so that the content of key miRNA in the exosome is remarkably increased, and the function of the exosome in cerebral ischemia treatment is enhanced; the exosome is used as a cell-free treatment mode, so that the risks of cell proliferation, differentiation, immunological rejection and the like possibly caused by MSC transplantation are avoided, and standardization and large-scale preparation are easier; the mesenchymal stem cell exosome of the overexpressed miR-29 can simultaneously realize multiple effects, such as protecting neurons, promoting vascular regeneration, inhibiting inflammatory response, repairing blood-brain barrier and the like, so that cerebral arterial thrombosis can be more comprehensively treated; according to the scheme, through miRNA function enhancement, a stronger treatment effect is provided, and the problems of insufficient function, low miRNA content and weak targeting in existing mesenchymal stem cell exosome treatment are solved.

The utility model relates to the technical field of processing equipment, in particular to a cable wire processing device capable of rapidly cutting. The cable wire processing device capable of cutting quickly comprises a mounting frame, a winding frame, a limiting rod, a clamping ring, a cutting mechanism and the like, the rightmost end of the upper side of the mounting frame is fixedly connected with a winding frame, the left side of the winding frame is fixedly connected with two limiting rods, a clamping ring is fixedly connected between the two limiting rods, the upper side of the mounting frame is provided with a cutting mechanism, the cutting mechanism is located on the left side of the winding frame, and the cutting mechanism is used for cutting a cable. The second motor is controlled to drive the bevel gear set to rotate, the distance between the two clamping plates can be adjusted, a cable cannot move at will when cut, and the length of the cut cable is accurate.

The invention discloses a wood frog egg oil soft capsule for inhibiting premature ovarian failure and a preparation method thereof, the wood frog egg oil soft capsule comprises wood frog egg oil, squalene, vitamin E, American ginseng, maltodextrin, linseed oil, dunaliella salina aqueous extract, silybum marianum seed oil, chitosan oligosaccharide and white peony root aqueous extract. The preparation method of the wood frog egg oil soft capsule comprises the following steps: uniformly mixing wood frog egg oil freeze-dried powder, squalene, vitamin E, American ginseng, maltodextrin, linseed oil, dunaliella salina aqueous extract, silybum marianum seed oil, chitosan oligosaccharide and white peony root aqueous extract in parts by mass through superfine grinding to obtain a wood frog oil compound; the oviductus ranae compound is prepared into a capsule content, and the capsule content is filled into a capsule shell by a soft capsule machine to prepare the soft capsule. The oviductus ranae soft capsule is rich in various nutritional ingredients, has an excellent function of inhibiting premature ovarian failure of women through scientific compatibility, and can effectively activate the activity of ovarian cells and promote normal metabolism and function maintenance of the ovarian cells.

The application provides a pretreatment method for improving the freezing-recovery success rate of human embryonic stem cell differentiation middle stage cells and application, and comprises the following steps: before starting kidney organoid induction differentiation, culturing human embryonic stem cells in a composite culture system for a period of time; wherein the composite culture system comprises a basic culture medium and an additive, and the additive comprises a PD0332991 reagent. Through pretreatment of human embryonic stem cells before starting induction differentiation, the PD0332991 improves the tolerance of differentiation middle stage cells to freezing stress through a double mechanism of cell cycle regulation and stress defense enhancement, can obviously improve the freezing-recovery survival rate of Day4 differentiation middle stage cells under the premise of not affecting the differentiation potential of hESC, and ensures that most of the recovered cells continue to differentiate into kidney organoids with complete structure and normal marker expression.

The utility model discloses a 3D printing zirconium oxide orthodontic bonding substrate, and relates to the technical field of tooth orthodontics. The tooth repairing plate mainly comprises a base plate body, the base plate body is in a U shape and wraps the outer surface of a tooth, two repairing plate bodies which are distributed left and right are arranged on the base plate body, the lower end faces of the repairing plate bodies are inwards-concave curved surfaces, and the two repairing plate bodies are attached to the concave portion of the tooth end repairing portion. And the inner side surface of the base plate body is bonded and fixed with teeth through a dental binder. According to the dental orthodontic plate, the base plate body and the two repairing plate bodies are directly coated on the outer side and the end part of a dental crown, so that orthodontic treatment on teeth can be realized, and as the teeth do not need to be greatly ground and prepared, damage to enamel and dentin is reduced, health and functions of the teeth are protected, and the base plate body is designed into a U shape, so that the dental orthodontic plate is convenient to use. The orthodontic device is tightly attached to the tooth surface, so that the concealment of the orthodontic device is improved, meanwhile, the possibility of impaction of food residues is reduced, and the difficulty of oral hygiene maintenance is reduced.