Shoe insole

Abstract

The invention relates to an orthotic insole (1) with elevations and depressions arranged so as to support the foot, wherein a carrying layer is thermally deformed, as an insole blank (2), in accordance with the orthopaedically desired shape of the insole (1), wherein a metatarsal elevation (3) is continued into the region of the ball of the foot (4), and the carrying layer has a material volume which is sufficient for forming the metatarsal elevation (3) and other elevations, such as a sagittal elevation (5) and cuboid support (6), wherein the insole blank (2) is injection moulded in one piece and comprises two types of plastic, wherein the plastics have different levels of stiffness and wherein the stiffer plastic is arranged in a rear region - the rear part (7) of the insole blank (2) - and wherein the less stiff plastic is arranged in a front region - the front part (8) of the insole blank (2) - and wherein a shaped transition is formed between the transverse metatarsal elevation (3) and the sagittal elevation (5). The invention also relates to a method for producing orthotic insoles.

Description

[0001] shoe insole

[0002] The invention relates to an orthopedic insole according to the preamble of claim 1. Furthermore, the invention relates to a method for producing the insole and to an insole blank.

[0003] Orthopedic insoles for footwear have been around for a long time. The goal of such insoles is to eliminate or mitigate the adverse effects of orthopedic deformities and misalignments of the foot and the associated musculoskeletal system.

[0004] For example, EP 2000039 A1 discloses insoles with cushioning inserts in the forefoot, longitudinal arch, and heel areas. DE 3304537 A1 shows an insole that is adapted to an impression by heating and molding a blank. EP 0893112 A1 discloses an insole with a pad-shaped elevation in the metatarsal area.

[0005] One problem with conventional insoles is that they fail to adequately address individual foot defects and misalignments. Orthopaedists use prefabricated blanks to manufacture the insoles, which in many cases are only partially adaptable to the individual foot.

[0006] The object of the present invention is the production and use of an orthopedic insole blank and the insole formed therewith, which takes into account and corrects the defects and misalignments of the individual foot. The production of an insole blank according to the invention and the insole formed therewith is described below, by way of example. First, a foam impression of the foot is made in the usual way. The foam impression is then adapted to the outer contour of the shoe according to the shape and length of the shoe.

[0007] A cast is then made from the foam impression. For example, this can be made from plaster or stucco plaster. The casting material should be sufficiently stable to prevent breakage. Once hardened, the casting material must allow easy processing with abrasives or blades.

[0008] When using plaster, the cast is then manually modeled according to the deformities and defects to be corrected by carving material from the sole area of ​​the cast. According to the invention, the recess for forming the metatarsal elevation is extended into the area of ​​the metatarsophalangeal joints. Elevations in the area of ​​the toe prints, the ball of the toe prints, and the heel are leveled, for example, by planing, and joined together over a section along the outer edge of the footprint to form a continuous, flat surface. Irregularities in the cast that should not be reflected in the insole are removed, for example, by sanding or scraping.

[0009] A suitably sized insole blank is then heated to approximately 180°C in hot air and vacuum-mounted onto the cast, which may have been post-treated. According to the invention, the insole blank has a raised portion in the metatarsal region extending up to the metatarsophalangeal joints and has a material volume sufficient to form the metatarsal elevation and other elevations such as the sagittal elevation and cuboid support.

[0010] The inventive insole blank, with its two-layer construction, is made of two plastics that are fused together during injection molding. The first plastic has a harder structure and extends from the heel area to the talus area. The second, softer plastic extends from the talus area forward to the toe area. A tab extends from the harder plastic within the softer plastic in the center of the insole blank into the metatarsal area.

[0011] The plastics preferably have a specific weight of about 0.3 g per cm 3 The harder structure of the first plastic is chosen so that the insole allows only minimal deformation when walking. In contrast, the second, softer plastic is flexible, allowing the foot to roll smoothly.

[0012] A three-layer construction can be used to complete the insole, with a third layer being glued over the entire surface of the insole on the surface facing the foot as a cushioning layer. For example, this can be a soft cushioning material with a Shore hardness of 15 to 20. The layer thickness is, for example and preferably, approximately 1.6 mm. A soft cushioning material from the Dyafoam brand has proven to be effective.

[0013] If such a third layer is not to be used, for example because the insole thickness should be kept as low as possible, the foot-side area can also be covered with a thin fiber layer such as microfiber.

[0014] The advantage of the aforementioned three-layer variant is evident in patients with diabetes or rheumatism. The improved pressure distribution provided by the third layer prevents pressure sores.

[0015] The purpose of the advanced metatarsal elevation according to the invention is to stimulate the gripping action of the toes and thus improve blood circulation in the sole area.

[0016] In another variant of the insole design, a flat stiffening plate can be placed on the soft area of ​​the insole blank, extending from the toe area to the midfoot area. The resulting stiffening of the front area of ​​the insole has a positive effect on decompensated flat feet and splayed feet, such as those found in so-called hollow feet. If the flat stiffening plate is not desired in order to keep the insole thickness to a minimum, a strip-shaped stiffening plate in the form of an S-shaped strip of stiff material, preferably carbon, can be inserted instead of the flat stiffening plate. This strip is glued to the insole from below and has a similar effect to the flat stiffening plate.

[0017] The features of the invention are described in more detail below.

[0018] The orthopedic insole with raised and lowered sections designed to support the foot can have the following features:

[0019] - a supporting layer which is thermally deformed as an insole blank according to the orthopedically desired shape of the insole, whereby a metatarsal elevation is brought forward into the area of ​​the metatarsophalangeal joints and the supporting layer has a material volume which is sufficient for the formation of the metatarsal elevation and other elevations, such as sagittal elevation and cuboid support.

[0020] Furthermore, it can be provided that the insole blank is injection-molded in one piece and comprises two types of plastic,

[0021] - wherein the plastics preferably each have a density of about 0.3 g / cm 3and wherein the plastics have different stiffnesses and wherein the stiffer plastic is arranged in a rear region of the insole blank, in particular substantially in the region of the heel and the tarsal bones, and wherein the less stiff plastic is arranged in a front region of the insole blank, in particular substantially in the region of the metatarsal bones and the toes.

[0022] Furthermore, it can be provided that a fully modeled transition from the transverse metatarsal elevation to the sagittal elevation is formed. Thus, a continuous elevation can extend from the sagittal region to the metatarsal region, whereby, in particular, the sagittal elevation can be connected to the metatarsal elevation via a bridge. Preferably, a tab of the harder plastic within the softer plastic in the center of the insole blank can extend into the area of ​​the metatarsal elevation. Particularly preferably, the tab of the harder plastic can extend up to approximately 50% of the extent of the metatarsal elevation in the direction of the metatarsophalangeal joints.

[0023] The insole blank can, for example, have a minimum thickness of 2 to 5 mm, preferably 4 mm, and the metatarsal elevation in the metatarsal area can have a thickness adapted to the foot of up to 4 times the minimum thickness, preferably 3 times.

[0024] As an alternative, a stiffening plate can be arranged on the underside of the base layer, essentially in the front, softer area.

[0025] The stiffening plate can extend over a large area across the underside of the softer, front part of the support layer, essentially in the area of ​​the midfoot and toes.

[0026] Alternatively, the stiffening plate may extend in a substantially S-shape from the area under the flap to below the support area of ​​the little toes.

[0027] If necessary, it can also be provided that the area of ​​the heel impression is designed to provide moderate space for the heel bone and is preferably straight up to a base of the sagittal elevation or up to a base of the cuboid support, wherein the base of the sagittal elevation in the longitudinal extension of the insole is essentially at the same height as the base of the cuboid support.

[0028] If necessary, the sagittal elevation can be provided with an ascending branch and a descending branch. The ascending branch can run from the base of the sagittal elevation to the highest point of the sagittal elevation in the talus region and can be modeled, particularly reworked. The descending branch can run from the highest point of the sagittal elevation to the imprint of the ball of the big toe and follow the natural shape of the footprint. The ascending branch preferably rises more steeply on average than the descending branch descends. The process for manufacturing orthopedic insoles comprises the following steps:

[0029] - Creating a negative foam impression of a patient’s foot,

[0030] - Extending the outer contour of the foam impression to the shape and length according to the patient’s shoe size,

[0031] - Creating a positive impression by pouring the foam impression, preferably with stucco plaster,

[0032] - Processing the positive impression to form the elevations and depressions of the sole surface of the insole required for the correction of the sole of the foot,

[0033] - Selection of an insole blank according to the patient’s shoe size,

[0034] - Heating the insert blank, in particular by means of hot air, to preferably 100°C to 250°C, particularly preferably 160°C to 200°C, optionally 180°C,

[0035] - Shaping by pulling the heated insole blank onto the machined positive impression, preferably under vacuum, and then cooling,

[0036] - Post-processing of the insole blank after shaping

[0037] - Final production of the insert.

[0038] When processing the positive impression, recesses can be created to model structures to treat the patient's malpositions.

[0039] The insole blank can be injection-molded in one piece and comprise two types of plastic,

[0040] - wherein the plastics preferably each have a density of about 0.3 g / cm 3 and

[0041] - the plastics have different stiffnesses and

[0042] - wherein the stiffer plastic is arranged in a rear region, in particular essentially in the region of the heel and the tarsal bones, of the insole blank and

[0043] - wherein the less rigid plastic is arranged in a front region, in particular essentially in the region of the metatarsal bones and the toes, of the insole blank.

[0044] A tab of the harder plastic can extend within the softer plastic in the middle of the blank into the metatarsal area.

[0045] The plastics of the insole blank are preferably thermoplastically deformable. The insole blank is shaped to match the shape of the positive impression, particularly forming a metatarsal elevation and / or a sagittal elevation and / or a cuboid support.

[0046] During the final production of the insole, a full-surface layer is applied to one side of the insole, particularly the one facing the foot.

[0047] The full-surface layer can comprise a soft cushioning material with a Shore hardness of 15 to 20 and preferably a thickness of 1.6 mm as a cushioning layer. The full-surface layer can also be a cover comprising microfiber material.

[0048] During the final production of the insole, a stiffening plate, preferably a carbon plate, can be attached to at least a partial area of ​​an underside of the insole, in particular facing away from the foot.

[0049] The stiffening plate extends essentially over a front area of ​​the insole, particularly in the area of ​​the metatarsal bones and toes.

[0050] Alternatively, the stiffening plate on the underside of the insole may extend in a substantially S-shape from a central region to an area of ​​the insole whose upper side is intended to come into contact with the little toe.

[0051] The invention is explained in more detail below in several variants with reference to the drawings. They show:

[0052] Fig. 1 is a schematic representation of a cast of a foam impression,

[0053] Fig. 2a and 2b are schematic representations of a reworked cast of a foam impression,

[0054] Fig. 3 is a schematic representation of an insole blank according to the invention,

[0055] Fig. 4 is a schematic representation of the top side of an insert,

[0056] Fig. 5 is a schematic representation of the underside of an insert with stiffening plate,

[0057] Fig. 6 is a sectional view of a longitudinal section through an insert, showing the side of the insert facing the outer edge, and Fig. 7 is a sectional view of a longitudinal section through an insert, showing the side of the insert facing the inner edge.

[0058] Figure 1 shows a schematic representation of a cast 12 of a foam footprint, viewed from above. The foam footprint was enlarged to adapt the shape of the insole to the shape of the shoe in which it is to be inserted. Therefore, the cast 12 is larger than the actual footprint, and the edge 11 of the cast, particularly in the toe area, is shifted outwards relative to the toe print area 16, thus expanding the footprint area. The areas of the foot that most preferentially come into contact with the ground form distinct areas of the footprint. These areas are the toe print area 16, the ball print area 17, and the heel print area 18. The imprint of the ball of the big toe 19 forms the proportionally largest part of the ball print area 17.The area in the center of the footprint, beginning at the ball of the foot and extending toward the heel, is called the metatarsal region 13 and forms a transverse arch. The arch along the inner edge 21 of the foot is called the sagittal region 20.

[0059] Figures 2a and 2b show schematic representations of a reworked cast 12 of a foam impression. Figure 2a shows a topographical view of the reworked cast 12, and Figure 2b shows the same reworked cast 12 with highlighted areas. Reworking the cast is also called modeling. During modeling, the surface of the cast 12 is planed until a continuous, flat surface is formed that connects the area of ​​the toe impressions 16, the area of ​​the ball impressions 17, and the area of ​​the heel impression 18 via a narrow area along the outer edge 22. This planed, flat surface is visible in Figures 2a and 2b as a continuous white surface without topographical contour lines. Depressions remain in the cast 12 that lie between the area of ​​the toe impressions 16 and the area of ​​the ball impressions 17, as well as in the sagittal area 20.In the metatarsal region 13, behind the area of ​​the ball impressions 17 in the center of the footprint, a metatarsal depression 23 is incorporated into the cast 12. The transition from the transverse region of the metatarsal region 13 to the sagittal region 20 is thus fully modeled as a metatarsal depression 23. In contrast, the depression in the cast 12 between the areas of the toe impressions 16 and the ball impressions 17, and the front part of the sagittal region 20, behind the impression of the ball of the big toe 19, remain unprocessed. Furthermore, a depression 24 is modeled on the outer edge 22 of the cast 12 in front of the area of ​​the heel impression 18, which will later serve to form the cuboid support 6. The modeled areas of the metatarsal depression 23 and the depression 24 are highlighted in Figure 2b by hatching in one direction, while unprocessed areas have hatching in the opposite direction and planed areas are recognizable as a continuous white area.

[0060] Figure 3 shows a schematic representation of an insole blank 2 according to the invention. The raised so-called heel cup edge 25 extends around the area of ​​the heel impression 18. This edge merges into the sagittal elevation 5 at the inner edge 21, in the illustration on the right edge. On the outer edge 22, in front of the area of ​​the heel impression 18, there is a pronounced elevation referred to as a cuboid support 6. In the metatarsal region 13, the insole blank 2 has a metatarsal elevation 3. The insole blank 2 has a soft front part 8 and a hard back part 7. However, the material of the hard back part 7 extends within the soft front part 8 in the form of a tab 9 into the area of ​​the metatarsal elevation 3.

[0061] Figure 4 shows a schematic representation of the upper side 14 of an insole 1. The insole 1 was produced from the insole blank 2 according to Fig. 3 by heating it, in particular using hot air, preferably to 180°C, and then pulling it onto the reworked cast 12 according to Fig. 2, preferably under vacuum, and then cooling it. By pulling the insole blank 2 onto the insole blank 2 in the heated state, the elevations and depressions of the reworked cast 12 are transferred to the insole blank 2, creating an insole 1 adapted to the cast 12. The transferred elevations and depressions thus form, among other things, the support areas of the toes in the area of ​​the toe impressions 16, the ball of the toe in the area of ​​the ball of the foot impressions 17, and the heel in the area of ​​the heel impression 18, enclosed by the heel cup edge 25.Furthermore, the shape of the cuboid support 6, the metatarsal region 13, and the sagittal region 20 of the insole blank 2 are adapted to the shape of the modeled cast 12. This creates a fully modeled transition from the transverse metatarsal elevation 3 to the sagittal elevation 5. The heel area is preferably moderately space-saving and preferably straight up to the attachment 27 of the sagittal elevation or up to the attachment of the cuboid support 6. This ensures that no undesirable pressure is exerted on the heel. The medial and lateral edges 25 are straight, extending from the cuboid support 6 to the attachment 27 of the sagittal elevation 5, and are provided with an integrated, exposed tendon attachment (medial Achilles tendon set). This means that there is no friction or pressure at the base of the sagittal elevation 5. This is a prevention against or alleviation of an existing exostosis process (medial heel spur).It also provides relief from flat feet problems.

[0062] Deriving from the fifth sagittal elevation, a distinctive, well-sculpted metatarsal bridge extends along the longitudinal axis of the foot across the midfoot to directly below the metatarsal joints of the second and fourth toes. This ensures excellent guidance of the midfoot and prevents medial and lateral deviation of the forefoot. The end of the third metatarsal elevation is well-elevated and contoured, with the rolling moment of the anatomical elevation being such that optimal extension of the toes is activated (in cases of claw or hammer toes, hallux valgus). This is an important movement process in the forefoot, as it promotes better muscular activity and contributes to strengthening the foot muscles.

[0063] The ascending branch 28 of the sagittal elevation 5, up to its highest point 29 in the talus region, is modeled higher, and the descending branch 30 toward the big toe is left as it is (little to no pressure exerted), as dictated by the foam impression. Any flat foot is supported by the ascending branch 28.

[0064] Figure 5 shows a schematic representation of the underside 15 of an insole 1 with a stiffening plate 10. The stiffening plate 10 is attached to the underside 15 of the insole 1 to stiffen the insole 1. However, the soft material in the front part 8 of the insole 1 retains a certain degree of flexibility, particularly with regard to the feel when walking. For maximum effectiveness, the stiffening plate 10 can extend essentially across the entire width of the insole 1 in the front part 8 and below the metatarsal area 13. For insoles 1 intended for use in narrow shoes, however, the stiffening plate can be designed as a narrower strip 26 (indicated by dashed lines). In this case, it has a slightly S-shaped configuration and runs in a curved manner from below the metatarsal area 13 to below the support area of ​​the little toe in the area of ​​the toe prints 16 (see Fig. 4).

[0065] Figure 6 shows a sectional view of a longitudinal section through an insole 1, showing the side of the insole 1 facing the outer edge 22. The soft front part 8 of the insole 1 and the hard back part 7 of the insole are shown. The course of the tab 9 of the hard material inside the soft front part 8 is also visible. The tab 9 extends into the area of ​​the metatarsal elevation 3. In front of the area of ​​the heel impression 18, the area of ​​the cuboid support 6 is highlighted on the elevation on the outer edge 22 of the insole 1. Figure 7 shows a sectional view of a longitudinal section through an insole 1, showing the side of the insole 1 facing the inner edge 21. The soft front part 8 of the insole 1 and the hard back part 7 of the insole 1 are shown. The course of the tab 9 of the hard material inside the soft front part 8 is also visible.The tab 9 extends into the area of ​​the metatarsal elevation 3. In front of the heel impression area 18, the area of ​​the sagittal elevation 5 is highlighted on the raised portion on the inner edge 21 of the insole 1. A full-surface layer forming contact with the foot, such as a microfiber layer or a cushioning layer (not shown), can be provided on the upper side 14.

[0066] Some key aspects of the invention are summarized above:

[0067] In an insole according to the present invention, the rear area, i.e. the area over which the heels and tarsal bones rest, is rigid, while the front area, i.e. the area over which the metatarsal bones and toes rest, is relatively softer. For this purpose, an insole blank is injection-molded in one piece from two materials with different stiffnesses. The rear, stiff part of the blank provides the necessary stability for the insole and stabilizes the foot on it, while the front, softer part ensures a comfortable rolling motion when walking and provides cushioning in the forefoot area.

[0068] This insole blank is an intermediate product that essentially already has the shape of an insole, with raised portions already included, such as a continuous raised portion from the metatarsal to the sagittal region and / or a preform of a cuboid support. The metatarsal and sagittal regions are thus connected by a kind of bridge and merge directly into one another.

[0069] When making the insole, a foam impression of the patient is taken and cast. The cast is then reworked, for example, by creating a depression in the metatarsal region and connecting it to the sagittal region, so that the transition from the transverse area of ​​the metatarsal region to the sagittal region is modeled as a metatarsal depression.

[0070] If a heated insole blank is then applied to this reworked cast, the fully modeled metatarsal depression of the cast is transferred to the insole blank, adapted to the patient. This transforms the continuous elevation from the metatarsal region to the sagittal region of the insole blank into a fully modeled transition from the transverse metatarsal elevation to the sagittal elevation, adapted to the patient's needs.

[0071] List of reference symbols

[0072] 1 insert

[0073] 2 insole blanks

[0074] 3 Metatarsal elevation

[0075] 4 Ball of foot area

[0076] 5 Sagittal elevation

[0077] 6 Cuboid support

[0078] 7 Back

[0079] 8 Front part

[0080] 9 tab

[0081] 10 stiffening plate

[0082] 11 Edge

[0083] 12 Cast

[0084] 13 Metatarsal area

[0085] 14 Top

[0086] 15 Bottom

[0087] 16 Toe print area

[0088] 17 Area of ​​ball prints

[0089] 18 Heel impression area

[0090] 19 Imprint of the ball of the big toe

[0091] 20 Sagittal area

[0092] 21 inner edge

[0093] 22 outer edge

[0094] 23 metatarsal depression

[0095] 24 Recess (cuboid support)

[0096] 25 Heel cup edge

[0097] 26 stripes

[0098] 27 Approach of the sagittal elevation

[0099] 28 rising branch

[0100] 29 highest point of the sagittal elevation

[0101] 30 falling branch

Claims

Patent claims 1. Orthopaedic insole (1 ) with raised and lowered sections to support the foot: - wherein a supporting layer, which is thermally deformed as an insole blank (2) according to the orthopaedically desired shape of the insole (1), - wherein a metatarsal elevation (3) is brought forward into the area of ​​the toe ball (4), - and the supporting layer has a material volume that is sufficient for the formation of the metatarsal elevation (3) and other elevations, such as the sagittal elevation (5) and cuboid support (6), characterized in that the insole blank (2) is injection-molded in one piece and comprises two types of plastic, - the plastics have different stiffnesses and - wherein the stiffer plastic is arranged in a rear region, the back part (7) of the insole blank (2), in particular essentially in the region of the heel and the tarsal bones, and - where the less rigid plastic is located in a front area, the front part (8) of the insole blank (2), in particular substantially in the region of the metatarsal bones and the toes, and characterized in that a fully modelled transition of the transverse metatarsal elevation (3) into the sagittal elevation (5) is formed.

2. Insole (1) according to claim 1, characterized in that a tab (9) of the harder plastic extends within the softer plastic in the middle of the insole blank (2) into the area of ​​the metatarsal elevation (3).

3. Insert (1) according to one or more of claims 1 to 2, characterized in that the tab (9) of the harder plastic extends up to approximately 50% of the extent of the metatarsal elevation (3) in the direction of the area of ​​the metatarsophalangeal joints (4).

4. Insert (1) according to one or more of claims 1 to 3, characterized in that the insert blank (2) has a minimum thickness of 2 to 5 mm, preferably 4 mm, and the metatarsal elevation (3) has a thickness adapted to the foot of up to 4 times the minimum thickness, preferably 3 times.

5. Insert (1) according to one of the preceding claims, characterized in that a stiffening plate (10) is arranged on the underside of the supporting layer essentially in the front, softer front part (8).

6. Insole (1) according to claim 5, characterized in that the stiffening plate (10) extends over a large area over the softer front part of the supporting layer essentially in the region of the metatarsal bones and the toes.

7. Insole according to claim 5, characterized in that the stiffening plate (10') extends substantially in an S-shape from the area lying under the flap (9) to below the support area of ​​the little toes.

8. Insole according to one of claims 1 to 7, characterized in that the area of ​​the heel impression (18) is designed to provide moderate space for the heel bone and is preferably guided straight up to a base (27) of the sagittal elevation (5) or up to a base of the cuboid support (6), wherein the base (27) of the sagittal elevation (5) is located in the longitudinal extension of the insole substantially at the same height as the base of the cuboid support (6).

9. Insert according to claim 8, characterized in that the sagittal elevation has an ascending branch (28) and a descending branch (30), - the ascending branch (28) runs from the base (27) of the sagittal elevation (5) to the highest point (29) of the sagittal elevation (5) in the area of ​​the talus and is modelled, - the descending branch (30) runs from the highest point (29) of the sagittal elevation (5) to the imprint of the ball of the big toe (19) and follows the natural shape of the footprint, - and wherein the ascending branch (28) rises on average more steeply than the descending branch (30) falls.

10. A method for producing orthopedic insoles comprising the steps: - Creating a negative foam impression of a patient’s foot, - expanding an outer contour or edge (11) of the foam impression to a shape and length corresponding to the patient's shoe size, - Creating a cast (12) by pouring the foam impression, preferably with stucco plaster, - processing, in particular modelling, the cast (12) to form the elevations and depressions of the sole surface of the insole (1) required for the correction of the sole of the foot, wherein the transition from the transverse region of the metatarsal region (13) to the sagittal region (20) is modelled as a metatarsal depression (23) - Selection of an insole blank (2) according to the patient’s shoe size, - heating the insert blank (2), in particular by means of hot air, to preferably 100°C to 250°C, particularly preferably 160°C to 200°C, optionally 180°C, - Shaping by pulling the heated insert blank (2) onto the machined casting (12), preferably under vacuum, and then cooling, - Post-processing of the insole blank (2) after shaping - Final production of the insert (1), characterized in that the insert blank (2) is injection-molded in one piece and comprises two types of plastic, - the plastics have different stiffnesses and - wherein the stiffer plastic is arranged in a back part (7), in particular essentially in the area of ​​the heel and the tarsal bones, of the insole blank (2) and - wherein the less rigid plastic is arranged in a front part (8), in particular substantially in the region of the metatarsal bones and the toes, of the insole blank (2).

11. Method according to claim 10, characterized in that during the processing of the cast (12) recesses are formed for modeling structures for the treatment of malpositions of the patient.

12. Method according to one of claims 10 to 11, characterized in that a tab (9) of the harder plastic extends within the softer plastic in the middle of the insole blank (2) into the metatarsal area (13).

13. Method according to one of claims 10 to 12, characterized in that the plastics of the insert blank (2) are thermoplastically deformable.

14. Method according to one of claims 10 to 13, characterized in that the insole blank (2) is adapted to the shape of the cast by the shaping, in particular that a metatarsal elevation (3) and / or a sagittal elevation (5) and / or a cuboid support (6) are formed.

15. Method according to one of claims 10 to 14, characterized in that during the final production of the insole (1) a full-surface layer is applied to an upper side (14) of the insole (1), in particular facing the foot.

16. The method according to claim 15, characterized in that the full-surface layer is a damping layer, in particular comprising a soft cushioning material with a Shore hardness of 15 to 20, and preferably has a thickness of 1.6 mm.

17. Method according to claim 15, characterized in that the full-surface layer is a cover comprising microfiber material.

18. Method according to one of claims 10 to 17, characterized in that during the final production of the insert (1), a stiffening plate (10), preferably a carbon plate, is attached to at least a partial area of ​​an underside (15) of the insert (1), in particular the underside facing away from the foot.

19. Method according to claim 18, characterized in that the stiffening plate (10) extends substantially over a front part (8) of the insert (1), in particular essentially in the area of ​​the metatarsal bones and the toes, the insert (1 ).

20. Method according to claim 18, characterized in that the stiffening plate (10) extends substantially in an S-shape from a central region, in particular from below the tab (9) to below the support region of the little toe.

Images