Dental article with applicator, lubricant composition and dental material

Abstract

The present invention relates to a dental article comprising: an application device (20) having a compartment (30) having an inner surface (31); a piston assembly (40) movably located in the compartment (30), the piston assembly (40) including a piston body (41); a seal A (42) located at a front end of the piston body, the seal A having one or more gaps (43); a seal B (44) spaced apart from the seal A; a collection reservoir (45) adapted to collect a lubricant composition during dispensing of dental material; a dispensing section (50) located at a distal end of the compartment; a lubricant composition (60) located on the inner surface of the compartment; and dental material (70) located in the compartment in contact with the lubricant composition.

Description

Technical Field

[0001] This invention relates to a dental article comprising an application device, a lubricant composition, and dental materials.

[0002] The application device includes a tubular compartment, a dispensing section, and a piston assembly having a collection reservoir for collecting the lubricant composition during the dispensing of dental materials. Background Technology

[0003] Dental materials, especially dental composites, are widely used to repair damaged tooth structures in patients' mouths.

[0004] Dental materials typically contain polymerizable (meth)acrylate components, fillers, and an initiator system suitable for hardening the dental material by applying radiation.

[0005] In particular, dental composites typically have high filler loads, which are required to achieve sufficient mechanical properties after the material has hardened.

[0006] High filler loading typically results in high-viscosity materials that need to be adequately stored before use to avoid unwanted polymerization.

[0007] As suitable packaging devices, spiral injectors and so-called compound capsules are often proposed.

[0008] Both packaging devices allow stored dental composite materials to be extruded onto the tooth surface to be treated via a nozzle.

[0009] However, due to the high viscosity of dental composites, high extrusion pressure is usually required.

[0010] High extrusion pressure can be achieved by using a threaded piston or by using a suitable applicator.

[0011] Packaging devices for storing dental materials are described in various patent documents.

[0012] US 5,603,701 (Fischer) describes a syringe device for delivering a solid but flexible material, such as a dental composite. The syringe device includes a threadless cylindrical member for receiving the material. The threadless cylindrical member has an inlet end, an outlet end, and an enlarged finger grip located at the inlet end. The syringe device also includes a member for slidably engaging the finger grip of the cylindrical member, the engaging member having a threaded through-hole. The syringe device also includes a plunger member for moving through the cylindrical member.

[0013] US 4,863,072 (Perler) describes an apparatus for delivering a light-curable composite dental filling material, comprising a tubular composite reservoir, a plunger, and a slider. The slider is freely movable longitudinally along the reservoir but is fitted to a small facet on the outer surface of the reservoir to prevent angular movement of the slider relative to the reservoir. The plunger consists of a shaft having threads to mate with the threaded inner diameter of the composite reservoir.

[0014] US 11,351,009 B2 (Clark et al.) describes a capsule for use in a dental composite dispenser, the capsule comprising a hollow body having walls defining an internal space of the body, the body including a proximal end and a distal end having a dispensing orifice; a first composite resin positioned within the internal space of the body; and a second composite resin positioned within the internal space of the body, wherein the first composite resin has a first viscosity and the second composite resin has a second viscosity less than the first viscosity, wherein no barrier is positioned between the first composite resin and the second composite resin, wherein the second composite resin is configured to be extruded through the dispensing orifice prior to the first composite resin, and wherein the first and second composite resins contact each other before the capsule is used in the dental composite dispenser.

[0015] US 2022 / 023538 A1 (Boehm et al.) describes a syringe for storing and dispensing a first component and a second component of a material. The syringe has a first chamber for receiving the first component and a second chamber for receiving the second component. The syringe also has an empty blank chamber that separates the first and second chambers from each other.

[0016] US 2016 / 296962 A1 (Maxa) describes an apparatus for dispensing a composition having a tip (72) including an inner conical funnel portion (74); a hollow cylinder (84) including an outer conical surface portion (86), an inner surface, an open front end, and an open rear end opposite the front end; and a piston (16) wherein the outer conical surface portion of the cylinder is aligned with and releasably engaged with the inner conical funnel portion of the tip, and wherein the piston is slidably engaged with the cylinder.

[0017] Similarly, patent documents also describe applicators for dispensing dental composite materials from packaging devices.

[0018] US 6,790,037 B1 (Orecchia) describes an adhesive material dispenser for applying adhesive dental materials from small plastic containers (capules), cartridges, or capsules. The dispenser includes a locking mechanism mounted on a syringe-type dispenser to securely hold the small plastic container, cartridge, or capsule within the syringe-type dispenser when adhesive material is applied from it.

[0019] US 10,016,257 B2 (Pauser) describes a pen-shaped dispenser for dispensing dental material, the pen-shaped dispenser having a handle and a cap attached for rotating relative to each other about the longitudinal axis of the dispenser, and having a cartridge for holding dental material and a screw plunger for dispensing dental material from the cartridge by a twisting action.

[0020] To reduce the applied force, it is also recommended to heat the dental composite material and thus reduce its viscosity.

[0021] Apparatus and methods for heating dental composite materials are described, for example, in WO 2021 / 053408 A1 (3M) and WO2020 / 025485 A1 (Voco).

[0022] Furthermore, it has been observed that even after dispensing is complete, applying large forces to high-viscosity dental composites can lead to a so-called "run-on" of the dental composite. This is because during the extrusion process, high-viscosity dental composites often cause the cartridge to expand in length and diameter, and require an appropriate amount of time to relax after the extrusion force has been applied by the screw / thread.

[0023] What all these devices have in common is that dispensing dental materials from them is often troublesome because dental materials are typically sticky and highly viscous.

[0024] To reduce friction during the dispensing process, it is also proposed to apply a lubricant to the inner surface of the device.

[0025] However, none of the solutions known to practitioners to date are entirely satisfactory. Summary of the Invention

[0026] There is still a need for an improved dental product or application device suitable for storing and dispensing dental materials.

[0027] In particular, there is a need for an application device for storing and dispensing dental materials with high viscosity.

[0028] Therefore, one object of the present invention is to provide an article or device that allows for easier dispensing of dental materials, particularly highly viscous ones, preferably with less effort.

[0029] Ideally, there should be small instruments that can dispense dental materials from products or devices without requiring refills.

[0030] It was found that during the dispensing of dental material from a device that contains lubricating material on its inner surface, the lubricating material tends to begin to accumulate at the distal end of the device.

[0031] The accumulated lubricating material is then dispensed from the device along with the dental material. This can have undesirable effects on the overall performance and physical properties of the hardened dental material.

[0032] Therefore, it is also expected that dispensing dental materials from the application device will not negatively affect the overall performance of the dental materials during use.

[0033] This invention solves one or more of these objectives.

[0034] In one aspect, the invention is characterized by a dental article as described herein and in the claims. The dental article (10) comprises: an application device (20) having a compartment (30) having an inner surface (31); a piston assembly (40) movably located in the compartment (30), the piston assembly including a piston body (41); a seal A (42) at a front end of the piston body, the seal A having one or more gaps (43); a seal B (44) spaced apart from the seal A; a collection reservoir (45) adapted to collect a lubricant composition during dispensing of dental material; a dispensing section (50) located at a distal end of the compartment; a lubricant composition (60) located on the inner surface of the compartment; and dental material (70) located in the compartment in contact with the lubricant composition.

[0035] In another aspect, the present invention relates to a method for producing dental articles as described herein and in the claims.

[0036] Another aspect of the invention relates to a method for dispensing dental materials from dental articles as described herein and in the claims.

[0037] The present invention also relates to a kit box comprising dental articles and, individually or in combination, the following: dental curing lamp, dental etchant, dental primer, dental adhesive, and dental cement as described herein and in the claims.

[0038] Unless otherwise defined, the following terms shall have the given meaning for the purposes of this specification:

[0039] "Dental products" refers to products intended for use in the dental or orthodontic field, especially dental products suitable for supporting dental restorations.

[0040] "Dental materials" refers to materials intended for use in dental practice. More specifically, dental materials include dental composites, dental cements, dental adhesives, dental crowns, and bridge materials. These materials are commonly used to restore teeth.

[0041] Dental materials are typically hardenable compositions that can be cured under environmental conditions, including temperatures ranging from 15°C to 50°C or from 20°C to 40°C over a time period of 30 minutes, 20 minutes, or 10 minutes. Higher temperatures are not recommended as they may cause pain to the patient and could be harmful to their health.

[0042] Dental materials are typically supplied to practitioners in relatively small volumes (i.e., in the range of 0.1 ml to 100 ml, or 0.5 ml to 50 ml, or 1 ml to 30 ml).

[0043] "Dental restorative materials" refers to materials used to restore teeth. Examples of dental restorations include crowns, bridges, inlays, onlays, veneers, decorative surfaces, inner crowns, crown-bridge frameworks, and parts thereof.

[0044] "Cureable, curable, or polymerizable components" are components that can be cured or solidified by radiation-induced polymerization in the presence of a photoinitiator or by using a redox initiator system. Cureable components may contain one, two, three, or more polymerizable groups. Typical examples of polymerizable groups include unsaturated carbon groups, such as vinyl groups. An example is a (meth)acrylate group.

[0045] As used herein, the terms "hardening" and "curing" are used interchangeably and refer to polymerization and / or crosslinking reactions involving one or more materials contained in the composition, including, for example, photopolymerization and chemical polymerization techniques (e.g., ionic or chemical reactions that form free radicals that effectively polymerize olefinic unsaturated compounds).

[0046] "Initiator or initiator system" is a component or combination of components that can initiate the curing process of a curable component.

[0047] "Proximal" refers to the part that is closer to the operator's body or the product during use. For syringe assemblies, the rear end of the receiving plunger is the proximal end of the syringe assembly.

[0048] "Distal" means opposite to "proximal". For syringe assemblies, the tip or dispensing end is the distal end of the syringe assembly.

[0049] As used herein, “an,” “a,” “the,” “at least one,” and “one or more” are used interchangeably. Also in this document, numerical ranges expressed by endpoints include all numbers contained within that range (e.g., 1 to 5 includes 1, 1.5, 2, 2.75, 3, 3.80, 4, 5, etc.).

[0050] Adding "plural form" to a term means that the term should include both singular and plural forms. For example, the term "additive" refers to one additive and multiple additives (e.g., 2, 3, 4, etc.).

[0051] Unless otherwise specified, all figures used in the specification and claims that indicate the quantity of components, the results of physical property measurements (such as those described below), etc., shall be understood to be modified by the term "about" in all cases.

[0052] When these terms appear in the specification and claims, the terms "comprising" or "including" and their variations are not restrictive. "Constitutes substantially of" means that specific additional components may be present, namely those components that do not substantially affect the essential properties of the article or composition. "Constitutes of" means that no additional components should be present. The term "comprising" should also include the terms "constitutes substantially of" and "composes of". Attached Figure Description

[0053] Figure 1 This is a perspective view of the dental product described in this text.

[0054] Figure 2 This is a schematic enlarged cross-section of a portion of the dental article described in this text.

[0055] Figures 3A to 3D Different implementations of the piston assembly are shown.

[0056] Figures 4A to 4D The working principle of the dental article described herein is illustrated schematically. It shows how the lubricant composition flows from the inner surface of the compartment to the collection reservoir of the piston assembly during the dispensing of dental material. Detailed Implementation

[0057] The dental products described in this text have several advantageous properties.

[0058] Dental products are not only suitable for storing dental materials, but also facilitate the distribution of dental materials stored in dental products during use.

[0059] The lubricant composition on the inner surface of the compartment is suitable for reducing friction of dental materials on the inner surface of the compartment.

[0060] This makes it possible to dispense dental materials from the product without the need for supplementary equipment, such as caulking guns or similar application devices.

[0061] Collection reservoirs help reduce or avoid contamination of dental materials with the lubricant composition during the dispensing process, as the lubricant composition is collected in the collection reservoir during the dispensing process.

[0062] Because the lubricant composition has a much lower viscosity than dental materials, it can flow more easily through the gaps in the piston assembly.

[0063] The first seal of the piston assembly (seal A) is typically a gap seal that provides low resistance to the passage of the lubricant composition but high resistance to the passage of dental material. This facilitates the flow of the lubricant composition into the collection reservoir during the dispensing of dental material.

[0064] The dental products described herein typically function as follows:

[0065] The pressure required for dental material to pass through the gap seal (seal A) at the distal end of the piston assembly is much higher than the pressure required to pass through the distribution section at the distal end of the dental article.

[0066] Therefore, dental materials can be easily dispensed from dental products in the distal direction without the risk of a portion of the dental material flowing back through the gap seal in the proximal direction.

[0067] It has been found that at the exit restriction point of a dental article (i.e., at the dispensing section), the dental material typically forms a plug during the dispensing process, which reduces the amount of lubricant composition that leaves the tubular compartment with the dental material in the distal direction of the dental article.

[0068] This can cause the lubricant composition to accumulate in the distribution area before export restrictions on dental products are imposed.

[0069] However, once the seal A of the piston assembly reaches the area of ​​the dispensing section during the dispensing of dental material, the lubricant composition begins to flow back across one or more gaps in the seal A into the collection reservoir of the piston assembly.

[0070] Due to the design of the piston assembly, the pressure required to expel the lubricant composition distally through the dental article's confinement is higher than the pressure required to force the lubricant composition back into the piston assembly's collection reservoir.

[0071] The collection reservoir behind the gap seal allows the lubricant composition to be forced into the collection reservoir of the piston assembly. The volume of the piston assembly's collection reservoir is typically large enough to occupy the entire volume of the lubricant composition.

[0072] The collection and storage device may also have a connection to the hollow area inside the piston body.

[0073] A tight seal (seal B) is provided behind the collection reservoir to prevent the lubricant composition from flowing into the gap between the optional piston rod and the inner wall of the compartment; thereby preventing or reducing the risk of the lubricant composition leaving the dental product at the proximal end.

[0074] The interior of a piston assembly typically has a ventilation opening near the proximal end, allowing any air present to exit the piston assembly. The ventilation opening can have different shapes, such as circular or rectangular, with circular openings often being preferred.

[0075] The presence of ventilation openings prevents or reduces the risk of air pressure buildup in the piston assembly or compartment of the application device, which could otherwise cause dental material spillage or a “sponge-like” feeling when pressure is applied to the piston assembly via an optional piston rod, or even prevent the lubricant composition from flowing into the collection reservoir of the piston assembly.

[0076] If present, the vent opening provides sufficiently high resistance to the lubricant composition to prevent the lubricant composition from exiting the piston assembly in the proximal direction through the vent opening.

[0077] This invention relates to a dental article comprising an application device, dental materials, and a lubricant composition.

[0078] The application device typically includes a compartment, a piston assembly, and a dispensing section.

[0079] The compartment includes the inner surface.

[0080] The compartment may further be characterized by having a proximal end, a distal end, an inner diameter, and an axial length.

[0081] The length of the compartment essentially defines the volume of the packaging unit, which can be used to receive dental materials to be stored in the packaging unit.

[0082] The volume of the compartment is typically in the range of 0.1 ml to 100 ml, or 0.5 ml to 50 ml, or 1 ml to 30 ml.

[0083] The inner diameter of the compartment is typically in the range of 2mm to 25mm.

[0084] The outer diameter of the compartment is typically in the range of 4mm to 30mm.

[0085] Therefore, the wall thickness of the compartment is usually in the range of 0.5mm to 2mm.

[0086] The ratio of the length to the inner diameter of a compartment is typically in the range of 1 / 25 to 1 / 3.

[0087] Such a ratio is found to be useful because it provides a good balance between the diameter available for transferring force to the dental material during the extrusion process and the practitioner's handling of the dental product.

[0088] The compartments are usually tubular.

[0089] Generally, the application device may have the shape of a syringe, which has a tubular hollow body with a front end and a rear end opposite to the front end.

[0090] A piston assembly can be inserted into the compartment, particularly at the rear or proximal end of the compartment, and this piston assembly slides into the inner surface of the compartment. That is, the piston assembly is capable of moving within the compartment.

[0091] The piston assembly is also used to seal the rear end of the compartment and to transfer pressure to the dental material during the squeezing or dispensing process.

[0092] The piston assembly includes a cylindrical piston body.

[0093] The piston body includes two seals, seal A and seal B.

[0094] Seal A is located at the front or distal end of the piston body.

[0095] Seal B is spaced apart from seal A in the proximal direction of the dental article.

[0096] Seal A includes one or more gaps.

[0097] One or more gaps have a width W in the direction of the inner surface of the tubular compartment. SA .

[0098] Width W SA It can be within the range of 0.05mm to 0.50mm or 0.08mm to 0.30mm.

[0099] The gaps are usually arranged circumferentially.

[0100] The one or more gaps may have the shape of a circumferential slit, a gear edge, or an intermittent gap seal.

[0101] Piston assembly and / or seal B typically include additional ventilation openings.

[0102] Ventilation openings are used to allow air to escape from tubular compartments during the dispensing of dental materials.

[0103] Since the ventilation opening is only for air, the diameter D of the ventilation opening is...VO Smaller, for example, in the range of 0.05mm to 0.3mm.

[0104] Ventilation openings are typically connected to the collection and storage unit.

[0105] Ventilation openings are typically located in seal B. However, ventilation openings can also be located in another section of the piston assembly.

[0106] The piston assembly may further include a pin at the distal end.

[0107] This pin helps practitioners visually determine the distribution status of dental materials in the compartment. When the pin appears in the distribution area, essentially all dental materials have been distributed.

[0108] The presence of pins can also help reduce the volume of remaining waste in the distribution section.

[0109] The pin can be conical or cylindrical. The axial length of the conical or cylindrical pin can correspond to or substantially correspond to the axial length of the distribution section.

[0110] Typically, the axial length of the pin is in the range of 2mm to 20mm or 5mm to 15mm.

[0111] The piston assembly further includes a collection reservoir.

[0112] The collection reservoir is adapted to collect the lubricant composition located on the inner surface of the compartment during the dispensing of dental materials.

[0113] The collection reservoir can be accessed through one or more gaps in seal A and thus connected to the compartment of the application device.

[0114] The collection and storage device has a volume V CR This volume is typically larger than the volume V of the lubricating composition. LC .

[0115] Volume V CR The typical range is from 0.001 ml to 20 ml or from 0.005 ml to 5 ml.

[0116] The collection reservoir may include one or more parts connected to each other, wherein “connected to each other” means that the lubricant composition can flow from one part of the collection reservoir to the next part during the dispensing process.

[0117] A portion of the collection reservoir can be located in the hollow region of the piston body.

[0118] Alternatively or additionally, a portion of the collection reservoir may be located in the area between seal A and seal B.

[0119] Alternatively or additionally, a portion of the collection reservoir may be located in a piston rod (or plunger) having a hollow region connected to the hollow regions of the collection reservoir and the piston body.

[0120] If present, the piston rod is connected to or can be attached to the proximal end of the piston body. Once attached to the piston assembly, the piston rod should remain in its attached position during use of the dental product.

[0121] If necessary, the piston assembly and piston rod (if present) are made from a single part.

[0122] Dental products typically also include a dispensing section through which dental materials can be dispensed.

[0123] The allocation section is located at the far end of the compartment.

[0124] The dispensing section may be conical and / or include dispensing nozzles.

[0125] The dispensing nozzle can be releasably engaged or attached to the compartment.

[0126] The dispensing section may include a conical funnel section at the front end. The conical funnel section may include a conical inner surface.

[0127] Dental products further include a lubricant composition.

[0128] During storage, the lubricant composition is located on the inner surface of the tubular compartment.

[0129] Typically, the thickness of the lubricant composition layer ranges from 1µm to 500µm.

[0130] If necessary, the thickness of the layers can be determined by using a microscope to cut the packaging device and examine the interface between the dental material and the inner wall of the compartment.

[0131] At a temperature of 25℃ and 10s -1 At a shear rate of 1 Pa, the viscosity of the lubricant composition is typically in the range of 1 Pa. s to 10,000 Pa s, or 10 Pa s to 1,000 Pa s, or 20Pa s to 800Pa Within the range of s. Where 10Pa s to 1,000 Pa s, or 20Pa s to 800Pa The range of s is sometimes preferred.

[0132] This type of viscosity has been found useful because it facilitates coating the inner surfaces of the compartments in the packaging unit during production.

[0133] The viscosity is low enough to achieve uniform coating, and high enough to reduce the risk of the lubricant composition dripping or running off the inner surface of the packaging compartment.

[0134] Regarding its chemical properties and / or composition, the lubricant composition is compatible with dental materials.

[0135] The lubricant composition may contain monomers having olefinic unsaturated groups and optional fillers.

[0136] The molecular weight of this monomer is typically in the range of 130 g / mol to 1,200 g / mol, or 130 g / mol to 1,000 g / mol, or 130 g / mol to 800 g / mol, or 130 g / mol to 600 g / mol.

[0137] The lubricant composition may contain (meth)acrylate monomers, which are components that can be copolymerized with other polymerizable components commonly found in dental materials.

[0138] The lubricant composition may also contain fillers. One or more fillers may be present. Adding fillers may be beneficial, for example, in adjusting rheological properties such as viscosity.

[0139] The lubricant composition may also contain an initiator. One or more initiators may be present. Suitable initiators that may be present include photoinitiator systems and redox initiator systems.

[0140] Dental products further include dental materials.

[0141] Dental materials are located in the compartments of dental products.

[0142] The dental material comes into contact with the lubricant composition. That is, the lubricant composition serves as the interface between the inner surface of the compartment and the dental material stored therein.

[0143] A lubricant layer surrounds the dental material in areas where the dental material would otherwise be in direct contact with the inner surface of the compartment of the dental product.

[0144] Dental materials differ from lubricant compositions in their chemical composition.

[0145] The dental materials stored in the dental products described in this text are materials containing polymerizable components, particularly olefinic unsaturated groups.

[0146] Dental materials may further include fillers. The fillers in dental materials may be the same as or different from those present in lubricant compositions.

[0147] Dental materials may also contain an initiator. The initiator may be the same as or different from an initiator that may be present in a lubricant composition.

[0148] Dental products can be further characterized by the following features, either individually or in combination:

[0149] (a) The inner diameter of the tubular compartment is larger than the diameter of the piston body.

[0150] (b) The inner diameter of the tubular compartment is equal to or less than the diameter of the seal B of the piston assembly.

[0151] (c) The viscosity of the dental material is greater than that of the lubricant composition.

[0152] (d) The volume of the collection reservoir is at least as large as the volume of the lubricant composition applied to the inner surface of the tubular compartment.

[0153] (e) The axial length of the tubular compartment is at least 5 times the inner diameter of the tubular compartment.

[0154] (f) The inner diameter of the compartment is at least 50 times the width of the gap of seal A.

[0155] In some respects, the dental articles described in this text can be characterized by the following dimensions:

[0156] Implementation Plan 1

[0157] The dental articles described in this text are characterized by the following dimensions:

[0158]

[0159] Implementation Plan 2

[0160] The dental articles described in this text are characterized by the following dimensions:

[0161]

[0162] The dental products described herein are not intended for application into human muscles or veins.

[0163] Similarly, dental products are not used to sample bodily fluids (e.g., blood) from humans.

[0164] The present invention also relates to a method for producing the dental articles described herein.

[0165] This method typically includes the following steps:

[0166] Provide an application device as described in this text.

[0167] Apply a layer of the lubricant composition as described herein to the inner surface of the application device.

[0168] The dental material as described in this text is placed into a tubular compartment that comes into contact with the lubricant composition.

[0169] Insert the piston assembly as described in this text into the proximal end of the tubular compartment.

[0170] The application device itself is usually manufactured by injection molding.

[0171] Alternatively, the application device can also be produced by 3D printing.

[0172] The lubricant composition can be applied by spraying or coating with a suitable coating device (e.g., a sponge impregnated with the lubricant composition).

[0173] The application device and its various parts are typically made of plastic, preferably of an injection-moldable material.

[0174] The materials used in the application device are typically selected from PP (polypropylene), PE (polyethylene), PA (polyamide), PBT (polybutylene terephthalate), PET (polyethylene terephthalate), and COC (cyclic olefin copolymer).

[0175] To prevent dental materials from undesirably curing during storage, the materials of the application device, especially the materials of the compartments, are typically opaque to visible light (380 nm to 750 nm).

[0176] If needed and for further protection of dental materials from light during storage, dental products may include a removable cap at the dispensing section.

[0177] The present invention also relates to a method for dispensing dental materials from dental articles described herein.

[0178] The method for allocation includes the following steps:

[0179] Optionally remove the cover from the allocation section.

[0180] Apply compressive force to the dental material located at the proximal end of the compartment of the dental product.

[0181] The extrusion pressure is in the range of 5N to 150N, or in the range of 5N to 60N.

[0182] The force to be applied is within a certain range, which can be provided by the practitioner without much effort and without the need for additional small tools or specific packaging devices (such as spiral injectors).

[0183] Dental material stored in tubular compartments is dispensed by moving the piston assembly in the distal direction.

[0184] The present invention also relates to a kit box comprising the dental products described herein, and the following items, individually or in combination:

[0185] Dental adhesives typically have a relatively low viscosity (e.g., 0.01 Pa at 25°C). s to 3Pa Acidic dental compositions. Dental adhesives interact directly with the enamel or dentin surface of teeth. Dental adhesives are typically one-part compositions, are radiation-curable, and contain an olefinically unsaturated component with an acidic portion, an olefinically unsaturated component without an acidic portion, water, a sensitizer, a reducing agent, and additives.

[0186] Examples of dental adhesives are described in US 2020 / 0069532 A1 (Thalacker et al.) and US 2017 / 0065495 A1 (Eckert et al.). Dental adhesives are also commercially available, such as those from 3M. ™ Scotchbond ™ Universal (3M Oral Care).

[0187] Suitable dental primers are described in US 6,126,922 (Rozzi et al.) and WO 00 / 69393 A1 (3M). Dental primers are also commercially available, for example, from 3M. ™ Transbond ™ XT primer (3M OralCare).

[0188] Dental adhesives that can be added to kits include, in particular, self-adhesive resin adhesives containing an acidic polymerizable component (e.g., a (meth)acrylate component having a phosphoric acid or carboxylic acid moiety), a polymerizable component without an acidic moiety, an initiator system, and fillers.

[0189] Suitable dental cements are also commercially available, such as RelyX. ™ Unicem 2, RelyX ™ Universal or RelyX ™ Luting Plus (3M Oral Care).

[0190] Suitable dental curing lamps are described in US 10,758,126 B2 (Geldmacher et al.) or US 10,231,810 B2 (Gramann et al.). Dental curing lamps are also commercially available, such as 3M. ™ Elipar ™ S10 or 3M ™ Elipar ™ DeepCure S LED curing lamp (3M Oral Care).

[0191] The instructions for use describe how the dental product should be used in daily practice, outlining application steps and optional curing conditions.

[0192] The invention is illustrated by the following figures.

[0193] The reference numerals for dental articles, as well as possible and preferred ranges or dimensions, are described in the table below.

[0194]

[0195] Figure 1 A perspective view of an embodiment of the dental article (10) is shown. A dispensing section (50) is present at the distal end of the application device (20). A piston rod (80) for transmitting pressure on a piston assembly located within the compartment (not shown) of the application device is also shown.

[0196] Figure 2 A cross-section of a portion of a dental article (10) having a compartment (30), the inner surface (31) of the compartment, and the inner diameter D of the compartment are shown. c (34) The outer diameter of the compartment (35) The wall thickness of the compartment (36).

[0197] A piston assembly (40) is arranged within compartment (30). The piston assembly includes components with a diameter D. PB (46) The piston body (41). Seal A (42) is located at the front end of the piston body. Seal A (42) is a so-called gap seal, which has a width of W. SA (48) gap (43). The piston assembly further includes a collection reservoir (45). In this embodiment, the collection reservoir (45) includes two regions. One region is located within the hollow portion of the piston body (41). The other region is formed by the volume between seal A (42) and seal B (44). Both regions are connected to each other through an opening (47).

[0198] exist Figures 3A to 3D Different embodiments of the piston assembly (40) are shown in the figure.

[0199] Figure 3A The piston assembly (40) has a plate-shaped seal A (42) at its distal end. The gap is a circumferential slit surrounding the seal A (42). A seal B (44) is also shown, which is a tight seal. Two openings (47) leading to a hollow portion of the piston body, which is part of a collection reservoir, are also shown.

[0200] Figure 3B The gap (43) of the seal A (42) of the piston assembly shown is an intermittent gap seal.

[0201] Figure 3C The piston assembly (40) shown is similar to Figure 3B The piston assembly (40). However, the piston assembly (40) also includes a pin (49) at the distal end. Furthermore, the seal A (42) has fewer but wider gaps (43), which are also arranged circumferentially.

[0202] exist Figure 3D Another embodiment of the piston assembly is shown. A seal A (42) with a circumferentially arranged gap (43) is present at the distal end. A seal B (44) is present at the proximal end as a tight seal. A small vent opening (48) at the proximal end of the piston assembly is also shown. A collection reservoir (45) is located between seal A (42) and seal B (44), and in this embodiment, the collection reservoir comprises four sections, two of which are shown.

[0203] exist Figures 4A to 4B The diagram illustrates how dental products work.

[0204] Dental products in their initial state are shown Figure 4A In the middle. It has a certain layer thickness T. LC The lubricating composition (60) of (61) is located on the inner surface of the compartment. The lubricating composition (60) is in contact with the dental material (70). The compartment has a proximal end (32) and a distal end (33). The area for collecting the reservoir (45) is located in the hollow portion of the piston assembly (40), which is accessible through two openings (47).

[0205] exist Figure 4B In the process, the piston assembly has moved slightly in the distal direction, causing dental material (70) to begin to be dispensed from the dispensing section (50) of the application device. A small portion of the lubricating composition (60) has passed through the gap (43) in the seal A and has entered the collection reservoir (45).

[0206] exist Figure 4CIn this process, the piston assembly has moved further in the distal direction, and most of the dental material (70) has been dispensed from the dispensing section (50). Due to the tight seal B (44) of the piston assembly, the lubricating composition (60) cannot flow into the space between the proximal portion of the piston body and the inner surface (31) of the compartment, but is instead forced to flow into the collection reservoir (45) through the two openings (47). The lubricating composition (60) is now mainly located in the collection reservoir (45).

[0207] exist Figure 4D In this process, the seal A (42) of the piston assembly has reached the distal end of the compartment, and substantially the entire dental material (70) has been dispensed from the dental article. Furthermore, substantially the entire lubricating composition (60) is now located in the collection reservoir (45).

[0208] If needed, the viscosity of lubricant compositions and / or dental materials can be measured using a Physica MCR 301 (Anton Paar Germany GmbH, Ostfildern-Scharnhausen). Flowable composites and monomers can be measured at 25.0°C using a 15mm plate / plate system with a 0.2mm gap at a shear rate of 10 / s.

[0209] If needed, the extrusion pressure can be measured using a universal testing machine from ZwickRoell: Zwick 010, with a load sensor of Xforce K, a nominal force of 10kN, and a test speed of 0.25mm / s.

[0210] The sample to be tested (a package containing a lubricant composition and dental material) is placed vertically in the sample holder of the universal testing machine with the front outlet pointing downwards. At the top of the syringe plunger, a bolt with a load sensor attached to the testing machine is applied to force the dental material out of the application device under ambient conditions (23°C). The applied force is recorded during this process.

[0211] The entire disclosure of all patents, patent documents, and publications cited herein is incorporated by reference as if each were individually incorporated. Various modifications and alterations to the invention will be apparent to those skilled in the art without departing from the scope and spirit of the invention. The foregoing specifications, examples, and data provide a description of the manufacture and use of the compositions of the invention and the methods of the invention. The invention is not limited to the embodiments disclosed herein. Those skilled in the art will understand that many alternative embodiments of the invention can be prepared without departing from the spirit and scope of the invention.

Claims

1. A dental article (10), said dental article (10) comprising Application device (20), the application device (20) having A compartment (30) having an inner surface (31) and a piston assembly (40) movably located in the compartment (30). The piston assembly includes Piston body (41), seal A (42), the seal A (42) is located at the front end of the piston body and has one or more gaps (43), seal B (44), the seal B (44) is spaced apart from the seal A, A collection reservoir (45) adapted to collect a lubricant composition during the dispensing of dental materials, and a dispensing section (50) located at the distal end of the compartment. A lubricant composition (60), said lubricant composition (60) being located on said inner surface of said compartment, and Dental material (70), said dental material (70) being located in said compartment and in contact with said lubricant composition, The seal B is a tight seal that contacts the inner surface of the compartment. The seal A has one or more gaps in the direction of the inner surface of the compartment. The seal A has low resistance to the lubricant composition passing through it, but high resistance to the dental material passing through it, and The lubricant composition flows into the collection reservoir during the dispensing of the dental material.

2. A dental article (10), said dental article comprising: Application device (20), the application device (20) having Tubular compartments (30). The compartment has an inner surface (31), a proximal end (32), a distal end (33), and an inner diameter D. C (34) and axial length L C (37) Piston assembly (40), movably located within the tubular compartment, the piston assembly comprising... Having a diameter D PB (46) cylindrical piston body (41). An optional piston rod (80) is connected to or can be attached to the piston body. Seal A (42), said seal A (42) is located at the front end of the piston body (41), The seal A (42) has one or more gaps (43) in the direction of the inner surface (31) of the compartment, the gaps (43) having a width W SA (43a) Seal B (44), which is spaced apart from seal A (42), Seal B is a tight seal that contacts the inner surface (31) of the compartment, and Ventilation opening, the ventilation opening having a diameter D VO , A collection reservoir (45) adapted to collect a lubricant composition during the dispensing of dental materials, the collection reservoir being accessible through one or more gaps (43) in a seal A (42) and having a volume V CR , Distribution section (80), said distribution section (80) being located at the distal end (33) of said tubular compartment (30), Lubricant composition (60), said lubricant composition (60) having Volume V LC The lubricant composition is located on the inner surface (31) of the tubular compartment (30), and Dental materials (70) The dental material (70) comprises a polymerizable component and is located in the compartment (30) in contact with the lubricant composition (60). The dental product satisfies the equation , The seal A has low resistance to the lubricant composition passing through it, but high resistance to the dental material passing through it, and The lubricant composition flows into the collection reservoir during the dispensing of the dental material.

3. The dental article according to claim 1 or 2, wherein the gap (43) is arranged in a circular manner.

4. The dental article according to claim 2, wherein the ventilation opening is located in the direction of the distal end (33) of the compartment.

5. The dental article according to claim 1 or 2, wherein at least a portion of the collection reservoir (45) is located in the hollow region of the piston body (41).

6. The dental article according to claim 1 or 2, the dental article comprising a piston rod (80) connected to the piston body (41), the piston rod (80) having a hollow region in communication with the collection reservoir (45).

7. The dental article according to claim 1 or 2, wherein at least a portion of the collection reservoir (45) is located in the region between seal A (42) and seal B (44).

8. The dental article according to claim 1 or 2, wherein the one or more gaps (43) have a shape selected from circumferential slits, gear rims or intermittent gap seals.

9. The dental article according to claim 2, wherein the dispensing section (50) is tapered and / or includes a dispensing nozzle.

10. The dental article according to claim 1 or 2, wherein the piston assembly (40) includes a pin (49) at the distal end.

11. The dental article according to claim 1 or 2, wherein the lubricant composition (60) comprises a polymerizable component.

12. The dental article according to claim 1 or 2, wherein the dental material (70) comprises an initiator system for curing polymerizable components.

13. The dental article according to claim 1 or 2, wherein the dental material (70) is a dental restorative material.

14. The dental article according to claim 2, characterized in that... The following equations, alone or in combination: ， 。 15. A method for producing a dental article according to any one of the preceding claims, the method comprising the following steps: Provide an application device (20) according to any one of the preceding claims. Apply a layer of the lubricant composition (60) according to any one of the preceding claims to the inner surface (31) of the application device (20). The dental material (70) according to any one of the preceding claims is placed in the compartment (30) to contact the lubricant composition (60). The piston assembly (40) according to any one of the preceding claims is inserted into the compartment (30).

16. A method for dispensing the dental material (70) from a dental article (10) according to any one of the preceding claims, the method comprising the following steps: Apply a compressive force to the dental material (70) located at the proximal end of the compartment (30) of the dental article. The extrusion pressure is in the range of 5N to 150N.

17. A kit comprising a dental article (10) according to any one of the preceding claims, the kit further comprising, individually or in combination, the following: a dental curing lamp, a dental etchant, a dental primer, a dental adhesive, and a dental cement.

Images