CN108379665B - 一种双梯度的人工椎板及其制备方法 - Google Patents

一种双梯度的人工椎板及其制备方法 Download PDF

Info

Publication number
CN108379665B
CN108379665B CN201810201077.3A CN201810201077A CN108379665B CN 108379665 B CN108379665 B CN 108379665B CN 201810201077 A CN201810201077 A CN 201810201077A CN 108379665 B CN108379665 B CN 108379665B
Authority
CN
China
Prior art keywords
slurry
layer
temperature
sintering
binder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810201077.3A
Other languages
English (en)
Other versions
CN108379665A (zh
Inventor
朱向东
吴永豪
刘丹
李向锋
杨曦
宋跃明
张兴栋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan University
Original Assignee
Sichuan University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sichuan University filed Critical Sichuan University
Priority to CN201810201077.3A priority Critical patent/CN108379665B/zh
Publication of CN108379665A publication Critical patent/CN108379665A/zh
Application granted granted Critical
Publication of CN108379665B publication Critical patent/CN108379665B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02Inorganic materials
    • A61L27/12Phosphorus-containing materials, e.g. apatite
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02Inorganic materials
    • A61L27/10Ceramics or glasses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/56Porous materials, e.g. foams or sponges
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/447Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on phosphates, e.g. hydroxyapatite
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063Preparing or treating the raw materials individually or as batches
    • C04B38/0635Compounding ingredients
    • C04B38/0645Burnable, meltable, sublimable materials
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2430/00Materials or treatment for tissue regeneration
    • A61L2430/38Materials or treatment for tissue regeneration for reconstruction of the spine, vertebrae or intervertebral discs
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5427Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5436Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5445Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 micron
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5454Particle size related information expressed by the size of the particles or aggregates thereof nanometer sized, i.e. below 100 nm
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602Making the green bodies or pre-forms by moulding
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6562Heating rate
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6565Cooling rate
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567Treatment time
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/66Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/667Sintering using wave energy, e.g. microwave sintering
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74Physical characteristics
    • C04B2235/75Products with a concentration gradient
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Medicinal Chemistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Epidemiology (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Materials For Medical Uses (AREA)
  • Prostheses (AREA)

Abstract

本发明属于生物医用材料技术领域,具体涉及一种双梯度的人工椎板及其制备方法。所述人工椎板为横截面呈梯形、且具有轴向长度的基体,所述基体由上层、中间层和下层组成,所述上层、下层为致密的羟基磷灰石陶瓷层,所述中间层为多孔双相磷酸钙陶瓷层。本发明所述人工椎板呈致密/多孔/致密的梯形三明治结构,其与现有技术相比,具有更高的组织相容性和防粘连性,同时具有更优异的骨诱导性,且其结构简单,植入方便,适于大范围推广应用。

Description

一种双梯度的人工椎板及其制备方法
技术领域
本发明属于生物医用材料技术领域,具体涉及一种双梯度的人工椎板及其制备方法。
背景技术
后路椎板切除术(包括全椎板、半椎板、部分椎板切除等)是脊柱外科最为基础的、常用的手术操作,其适用范围几乎涵盖了脊柱外科所有病种,特别是患有颈、胸、腰椎椎管狭窄症的患者。虽然椎板切除能够有效地解除脊髓、神经的压迫缓解患者症状,但是椎板切除(缺失)后失去了其原本对椎管的屏障保护作用,缺损区域会有大量瘢痕组织增生,并向椎管内长入,甚至再次压迫、粘连、牵拉脊髓及神经根,导致手术失败。因此,椎板切除术后如何预防硬膜外瘢痕粘连、压迫,一直是脊柱外科研究的重点。
早期预防硬膜外瘢痕的材料包括游离或带蒂脂肪、透明质酸、几丁糖、明胶海绵等多种材料,虽然在预防粘连方面有一定效果,但其存在生物力学强度较低和降解速度较快等缺点,使其难以完全阻隔硬膜外肌肉瘢痕的压迫,中晚期效果较差。
人工椎板的出现能够一定程度上解决上述问题。其可作为一种人工屏障,重建椎管,修复后柱,能阻止成纤维细胞等周围结缔组织向缺损处的生长,引导迁移速度较慢的成骨细胞向缺损区内迁移,形成新骨。目前人工椎板的材料大体包括不锈钢、钛或钛合金、生物活性陶瓷、活性玻璃等,但上述人工椎板组织相容性以及防粘连性不足,同时不具有骨诱导性或骨诱导性较差,导致新骨形成能力欠佳。
因此,亟需提供一种具有高度的组织相容性和防粘连性,同时具有良好的骨诱导性的人工椎板。
发明内容
本发明旨在提供一种双梯度的人工椎板及其制备方法,该人工椎板呈致密/多孔/致密的三层结构,其具有高度的组织相容性和防粘连性,同时具有良好的骨诱导性。
为了达到上述目的,本发明采用以下技术方案:一种双梯度的人工椎板,所述人工椎板为横截面呈梯形、且具有轴向长度的基体,所述基体由上层、中间层和下层组成,所述上层、下层为致密的羟基磷灰石陶瓷层,所述中间层为多孔双相磷酸钙陶瓷层。
进一步地,所述上层和下层为厚度1~2mm的致密结构层。
进一步地,所述中间层为多孔结构层,孔隙率为30~80%。
相应地,本发明还提供了一种制备上述人工椎板的方法,包括以下步骤:
A)采用湿化学法制备尺寸为20~100nm的羟基磷灰石粉体或浆料;
B)将上述制备得到的羟基磷灰石粉体或浆料与水、粘结剂、分散剂混合均匀,搅拌,混合得到料浆Ⅰ,其中,羟基磷灰石粉体、水、粘结剂和分散剂的重量比为1:(0.5~1):(0.01~0.1):(0.01~0.1);
C)采用湿化学法制备尺寸为20~100nm的双相磷酸钙粉体或浆料,加入粘结剂、分散剂和造孔剂,搅拌,混合均匀,得到料浆Ⅱ;其中,双相磷酸钙粉体或浆料、粘结剂、分散剂和造孔剂的重量比为1:(0.5~1):(0.01~0.1):(0.1~1.5);
D)将料浆Ⅰ先注入模具中,固化时间为5min~2h;将料浆Ⅱ再浇注入致密层浆料之上,固化时间为5min~2h;待料浆Ⅱ固化后,在此基础上浇注料浆Ⅰ,固化时间5min~2h,形成致密层/多孔层/致密层的多层结构,固化、干燥,将干燥后的多层结构直接作为生坯或将干燥后的多层结构经等静压成型后作为生坯,其中,等静压压力为50MPa~500MPa;
E)将上述生坯置于烧结炉的炉腔中,经200~800℃分解有机物,然后经1000~1200℃烧结,切割,获得具有双梯度的人工椎板。
进一步地,所述步骤A)和C)中所述湿化学方法选自液相沉淀法、水热法、溶胶-凝胶法、微乳液法、模板法和超声化学合成法中的一种。
进一步地,所述步骤B)和步骤C)中所述粘结剂选自聚乙烯醇和聚乙二醇中的一种或其组合;所述分散剂选自甲基纤维素、柠檬酸、柠檬酸铵、六偏磷酸钠和聚丙烯酸中的一种或几种。
进一步地,所述造孔剂选自硬脂酸、碳粉、聚甲基丙烯酸甲酯、聚苯乙烯和淀粉中的一种或几种,其粒径优选为0.1~1000μm。
进一步地,所述造孔剂为硬脂酸,其粒径优选为0.1~1000μm。
进一步地,所述步骤E)中所述有机物分解过程具体为:采用马弗炉烧结,以0.5~20℃/min的升温速率将温度升至150~250℃,保温10min~2h;接着以0.5~3℃/min的升温速率将温度升至500℃,保温10min~4h;再以0.5~20℃/min的升温速率将温度升至600~800℃,保温30min~4h。
进一步地,所述步骤E)中所述烧结过程具体为:采用马弗炉烧结或微波烧结炉烧结,在使用马弗炉烧结时,烧结温度为800~1200℃,升温速度为5~20℃/min,保温时间0~4h,降温速度为10~100℃/min;当使用微波烧结炉烧结时,烧结温度为800~1200℃,升温速度为40~200℃/min,保温时间0.5~30min,降温速度为50~400℃/min。
本发明人工椎板由三层结构组成,上下层为致密的羟基磷灰石层,其表面光滑,分别与肌肉韧带和脊髓神经接触,防止其向椎管内生长,防止瘢痕组织形成,具有良好的软组织相容性和防粘连能力。中间层为多孔结构层,孔壁粗糙多微孔,由羟基磷灰石/磷酸三钙双相陶瓷构成,具有良好的骨传导和骨诱导能力。将本发明人工椎板植入体内后,上下致密的羟基磷灰石层可以为人工椎板提供力学支撑。
本发明具有以下优点:
本发明提供的人工椎板呈致密/多孔/致密的梯形三明治结构,其与现有技术相比,具有更高的组织相容性和防粘连性,同时具有更优异的骨诱导性。其结构简单,植入方便,适于大范围推广应用。
附图说明
图1为本发明人工椎板横截面示意图。
其中,1羟基磷灰石陶瓷层;2双相磷酸钙陶瓷层;3孔。
具体实施方式
以下通过实施例形式的具体实施方式,对本发明的上述内容作进一步的详细说明。但不应将此理解为本发明上述主题的范围仅限于以下实施例。
实施例1、一种双梯度的人工椎板
实施例1所述人工椎板为横截面呈梯形、且具有轴向长度的基体,所述基体由上层、中间层和下层组成,所述上层、下层为羟基磷灰石陶瓷层1,所述中间层为双相磷酸钙陶瓷层2,上层和下层为厚度1mm的致密结构层,所述中间层为多孔结构层,孔隙率为75%。
制备方法:
A)原料制备:
纳米羟基磷灰石粉体或浆料的制备:将0.835mol/L硝酸钙水溶液和与0.5mol/L磷酸氢二铵水溶液等体积混合,钙磷比为1.67,以氨水调节溶液pH为11.0,搅拌反应12h,然后在60℃下陈化24h,去离子水洗涤后得到羟基磷灰石浆料或经过滤干燥后得到羟基磷灰石粉体,羟基磷灰石粉体的平均粒径为40nm;
双相磷酸钙粉体或浆料的制备:将0.767mol/L硝酸钙水溶液和与0.5mol/L磷酸氢二铵水溶液等体积混合,钙磷比为1.534,以氨水调节溶液pH为9.0,搅拌反应12h,然后在60℃下陈化24h,去离子水洗涤后得到双相磷酸钙浆料或经过滤干燥后得到双相磷酸钙粉体;
B)将上述步骤A)制备得到的羟基磷灰石粉体或浆料,加入水、聚乙烯醇、甲基纤维素混合均匀,搅拌,混合得到料浆Ⅰ,其中,羟基磷灰石粉体、水、聚乙烯醇和甲基纤维素的重量比为1:0.5:0.1:0.1;
C)取上述制备得到的双相磷酸钙粉体或浆料,加入聚乙烯醇、甲基纤维素和硬脂酸,混合均匀,得到料浆Ⅱ;其中,双相磷酸钙粉体、粘结剂、分散剂和造孔剂的重量比为1:0.5:0.1:1.0;
D)将料浆Ⅰ先注入模具中,固化时间为30min;将料浆Ⅱ再浇注入致密层浆料之上,固化时间为30min;待料浆Ⅱ固化后,在此基础上浇注料浆Ⅰ,固化时间30min,形成致密层/多孔层/致密层的多层结构,固化、干燥,将干燥后的多层结构直接作为生坯或将干燥后的多层结构等静压成型后作为生坯,其中,等静压压力为200MPa;
E)将上述生坯置于马弗炉烧结炉的炉腔中,以10℃/min的升温速率将温度升至250℃,保温30min;以1.5℃/min的升温速率将温度升至500℃,保温45min;再以10℃/min的升温速率将温度升至700℃,保温2h使有机物分解;继续使用马弗炉烧结,以升温速度为10℃/min升温至1000℃,保温时间1h,以降温速度为20℃/min将温度降至室温,切割,获得具有双梯度的人工椎板,孔隙率为75%。
实施例2、一种双梯度的人工椎板
实施例2与实施例1的区别在于,步骤B)和C)中所述粘结剂为聚乙二醇,分散剂为柠檬酸,造孔剂为聚甲基丙烯酸甲酯,所述步骤D)所述等静压压力为300MPa,所述步骤E)为:将上述生坯置于马弗炉烧结炉的炉腔中,采用马弗炉烧结,以0.5℃/min的升温速率将温度升至150℃,保温10min;接着以0.5℃/min的升温速率将温度升至500℃,保温10minh;再以0.5℃/min的升温速率将温度升至600℃,保温30min使有机物分解;继续使用马弗炉烧结,以升温速度为10℃/min升温至1000℃,保温时间1h,以降温速度为20℃/min将温度降至室温,切割,获得具有双梯度的人工椎板,孔隙率为68%。
实施例3、一种双梯度的人工椎板
实施例3与实施例1的区别在于,步骤B)和C)中所述粘结剂为聚乙二醇,分散剂为柠檬酸铵,造孔剂为聚苯乙烯,所述步骤D)所述等静压压力为500MPa,所述步骤E)为:将上述生坯置于马弗炉烧结炉的炉腔中,采用马弗炉烧结,以20℃/min的升温速率将温度升至250℃,保温2h;接着以3℃/min的升温速率将温度升至500℃,保温4h;再以20℃/min的升温速率将温度升至800℃,保温4h使有机物分解;继续采用马弗炉烧结,以升温速度为20℃/min升温至1200℃,保温时间4h,以降温速度为100℃/min将温度降至室温;切割,获得具有双梯度的人工椎板,孔隙率为74%。
实施例4、一种双梯度的人工椎板
实施例4与实施例1的区别在于,步骤B)中羟基磷灰石粉体、水、聚乙烯醇和甲基纤维素的重量比为1:1:0.06:0.06;步骤C)中混合浆料、聚乙烯醇、甲基纤维素和硬脂酸的重量比为1:1:0.05:1.5,其余参数及操作如实施例1所示孔隙率为40%。
实施例5、一种双梯度的人工椎板
实施例5与实施例1的区别在于,所述步骤E)为:以5℃/min的升温速率将温度升至250℃,保温30min;以10℃/min的升温速率将温度升至500℃,保温45min;再以15℃/min的升温速率将温度升至700℃,保温2h使有机物分解;继续使用微波炉烧结,烧结温度为1000℃,升温速度为50℃/min,保温时间10min,以降温速度为60℃/min将温度降至室温,切割,获得具有双梯度的人工椎板,孔隙率为72%。
试验例一、质量检测
取实施例1~5制备得到的人工椎板,对上述人工椎板的密度、孔径及力学性能进行检测,结果如下表1所示。
表1检测结果
Figure BDA0001594511010000061
试验二、后路椎板切除术后瘢痕粘连实验
3.1实验动物及分组:
实验动物及分组选用新西兰白兔16只,体重2~2.5kg,雌雄不限。分为2组,每组8只,A组:椎板切除后不用任何置物覆盖;B组:使用实施例1人工椎板覆盖椎板缺损区域。术后所有动物均按照实验动物处理原则在同一饲养条件下分笼饲养,每天肌注青霉素8万单位5天预防感染。术后4周和8周处死实验动物各4只。
3.2手术操作:
统一以腰5椎板为手术椎板,定位好后备皮、标记手术区域,碘伏消毒,铺无菌洞巾,动物麻醉生效后,以腰5棘突为中心、做一长为约2cm切口后,逐层显露腰5棘突、关节突及椎板,以尖嘴咬骨钳及1.5mm椎板咬骨钳咬除腰5双侧椎板及黄韧带,显露硬脊膜,仔细操作避免损伤马尾神经等,分别予术区旷置(A组)或植入实验组人工椎板(B组),逐层缝合竖脊肌、筋膜及皮肤。
3.3术后防粘连评估:
观察切口愈合情况及实验动物有无瘫痪,观察各组间是否存在感染,与本实验无关的医师观察每组缺损处瘢痕生成情况及瘢痕与硬膜囊的粘连程度,按Rydell评分标准分为4级:
0级:硬膜外瘢痕组织与硬膜不相连;1级:硬膜外瘢痕组织与硬膜接近,但易分离;2级:硬膜外瘢痕组织与硬膜接近,且难分离;3级:硬膜外瘢痕组织与硬膜粘连,无法分离。
3.4结果如表2所示。
表2评分结果
组别 评估结果
A组 3
B组 0
由表2可知,在术区植入本发明实施例1人工椎板后,硬膜外瘢痕组织与硬膜不相连。
上述实施例仅例示性说明本发明的原理及其功效,而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下,对上述实施例进行修饰或改变。因此,举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变,仍应由本发明的权利要求所涵盖。

Claims (10)

1.一种双梯度的人工椎板,其特征在于,所述人工椎板为横截面呈梯形、且具有轴向长度的基体,所述基体由上层、中间层和下层组成,所述上层、下层为致密的羟基磷灰石陶瓷层,其分别与肌肉韧带和脊髓神经接触,用于防粘连;所述中间层为多孔双相磷酸钙陶瓷层,其和椎体接触,用于骨传导和骨诱导;其中,制备人工推板的方法包括如下步骤:
A)采用湿化学法制备尺寸为20~100nm的羟基磷灰石粉体或浆料;
B)将上述制备得到的羟基磷灰石粉体或浆料与水、粘结剂、分散剂混合均匀,搅拌,混合得到料浆Ⅰ,其中,羟基磷灰石粉体、水、粘结剂和分散剂的重量比为1:(0.5~1):(0.01~0.1):(0.01~0.1);
C)采用湿化学法制备尺寸为20~100nm的双相磷酸钙粉体或浆料,加入粘结剂、分散剂和造孔剂,搅拌,混合均匀,得到料浆Ⅱ;其中,双相磷酸钙粉体或浆料、粘结剂、分散剂和造孔剂的重量比为1:(0.5~1):(0.01~0.1):(0.1~1.5);
D)将料浆Ⅰ先注入模具中,固化时间为5min~2h;将料浆Ⅱ再浇注入致密层浆料之上,固化时间为5min~2h;待料浆Ⅱ固化后,在此基础上浇注料浆Ⅰ,固化时间5min~2h,形成致密层/多孔层/致密层的多层结构,固化、干燥,将干燥后的多层结构直接作为生坯或将干燥后的多层结构经等静压成型后作为生坯,其中,等静压压力为50MPa~500MPa;
E)将上述生坯置于烧结炉的炉腔中,经200~800℃分解有机物,然后经1000~1200℃烧结,切割,获得具有双梯度的人工椎板。
2.如权利要求1所述的人工椎板,其特征在于,所述上层和下层为厚度1~2mm的致密结构层。
3.如权利要求1所述的人工椎板,其特征在于,所述中间层为多孔结构层,孔隙率为30~80%。
4.一种制备如权利要求1~3任一所述人工椎板的方法,其特征在于,包括以下步骤:
A)采用湿化学法制备尺寸为20~100nm的羟基磷灰石粉体或浆料;
B)将上述制备得到的羟基磷灰石粉体或浆料与水、粘结剂、分散剂混合均匀,搅拌,混合得到料浆Ⅰ,其中,羟基磷灰石粉体、水、粘结剂和分散剂的重量比为1:(0.5~1):(0.01~0.1):(0.01~0.1);
C)采用湿化学法制备尺寸为20~100nm的双相磷酸钙粉体或浆料,加入粘结剂、分散剂和造孔剂,搅拌,混合均匀,得到料浆Ⅱ;其中,双相磷酸钙粉体或浆料、粘结剂、分散剂和造孔剂的重量比为1:(0.5~1):(0.01~0.1):(0.1~1.5);
D)将料浆Ⅰ先注入模具中,固化时间为5min~2h;将料浆Ⅱ再浇注入致密层浆料之上,固化时间为5min~2h;待料浆Ⅱ固化后,在此基础上浇注料浆Ⅰ,固化时间5min~2h,形成致密层/多孔层/致密层的多层结构,固化、干燥,将干燥后的多层结构直接作为生坯或将干燥后的多层结构经等静压成型后作为生坯,其中,等静压压力为50MPa~500MPa;
E)将上述生坯置于烧结炉的炉腔中,经200~800℃分解有机物,然后经1000~1200℃烧结,切割,获得具有双梯度的人工椎板。
5.如权利要求4所述的制备方法,其特征在于,所述步骤A)和C)中所述湿化学方法选自液相沉淀法、水热法、溶胶-凝胶法、微乳液法、模板法和超声化学合成法中的一种。
6.如权利要求4所述的制备方法,其特征在于,所述步骤B)和步骤C)中所述粘结剂选自聚乙烯醇和聚乙二醇中的一种或其组合;所述分散剂选自甲基纤维素、柠檬酸、柠檬酸铵、六偏磷酸钠和聚丙烯酸中的一种或几种。
7.如权利要求4所述的制备方法,其特征在于,所述造孔剂选自硬脂酸、碳粉、聚甲基丙烯酸甲酯、聚苯乙烯和淀粉中的一种或几种,其粒径优选为0.1~1000μm。
8.如权利要求7所述的制备方法,其特征在于,所述造孔剂为硬脂酸,其粒径优选为0.1~1000μm。
9.如权利要求4所述的制备方法,其特征在于,所述步骤E)中所述有机物分解过程具体为:采用马弗炉烧结,以0.5~20℃/min的升温速率将温度升至150~250℃,保温10min~2h;接着以0.5~3℃/min的升温速率将温度升至500℃,保温10min~4h;再以0.5~20℃/min的升温速率将温度升至600~800℃,保温30min~4h。
10.如权利要求4所述的制备方法,其特征在于,所述步骤E)中所述烧结过程具体为:采用马弗炉烧结或微波烧结炉烧结,在使用马弗炉烧结时,烧结温度为800~1200℃,升温速度为5~20℃/min,保温时间0~4h,降温速度为10~100℃/min;当使用微波烧结炉烧结时,烧结温度为800~1200℃,升温速度为40~200℃/min,保温时间0.5~30min,降温速度为50~400℃/min。
CN201810201077.3A 2018-03-12 2018-03-12 一种双梯度的人工椎板及其制备方法 Active CN108379665B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810201077.3A CN108379665B (zh) 2018-03-12 2018-03-12 一种双梯度的人工椎板及其制备方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810201077.3A CN108379665B (zh) 2018-03-12 2018-03-12 一种双梯度的人工椎板及其制备方法

Publications (2)

Publication Number Publication Date
CN108379665A CN108379665A (zh) 2018-08-10
CN108379665B true CN108379665B (zh) 2020-11-03

Family

ID=63066660

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810201077.3A Active CN108379665B (zh) 2018-03-12 2018-03-12 一种双梯度的人工椎板及其制备方法

Country Status (1)

Country Link
CN (1) CN108379665B (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111875408A (zh) * 2020-08-11 2020-11-03 中钢集团洛阳耐火材料研究院有限公司 一种可用做人工骨的羟基磷灰石多孔陶瓷的制备方法
CN116262667A (zh) * 2021-12-14 2023-06-16 中国科学院大连化学物理研究所 一种利用无缝对接成型技术制备多孔和致密一体陶瓷的方法
CN114984308B (zh) * 2022-06-28 2023-07-28 奥精医疗科技股份有限公司 一种唇腭裂修复材料及其制备方法
CN115998958A (zh) * 2023-01-18 2023-04-25 山东第一医科大学附属省立医院(山东省立医院) 一种具有缓释作用的骨组织工程支架及其制备方法与应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2799116A1 (fr) * 1999-09-30 2001-04-06 Euros Sa Implant intervertebral
CN1792390A (zh) * 2005-11-10 2006-06-28 武汉理工大学 人体硬组织金属植入件表面性能的处理方法
CN103565561A (zh) * 2013-09-26 2014-02-12 深圳清华大学研究院 腰椎间盘假体
CN204601180U (zh) * 2014-12-26 2015-09-02 四川大学 一种梯度结构磷酸钙生物陶瓷

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2799116A1 (fr) * 1999-09-30 2001-04-06 Euros Sa Implant intervertebral
CN1792390A (zh) * 2005-11-10 2006-06-28 武汉理工大学 人体硬组织金属植入件表面性能的处理方法
CN103565561A (zh) * 2013-09-26 2014-02-12 深圳清华大学研究院 腰椎间盘假体
CN204601180U (zh) * 2014-12-26 2015-09-02 四川大学 一种梯度结构磷酸钙生物陶瓷

Also Published As

Publication number Publication date
CN108379665A (zh) 2018-08-10

Similar Documents

Publication Publication Date Title
CN108379665B (zh) 一种双梯度的人工椎板及其制备方法
US7531004B2 (en) Pliable conformable bone restorative
Gogolewski et al. Biodegradable polyurethane cancellous bone graft substitutes in the treatment of iliac crest defects
Berghaus Porous polyethylene in reconstructive head and neck surgery
Wahl et al. Controlling the processing of collagen-hydroxyapatite scaffolds for bone tissue engineering
KR100807108B1 (ko) 다공성의 β-인산삼칼슘 과립의 제조 방법
JP2013507184A (ja) 生体組織エンジニアリングのためのデバイスおよび方法
WO1990001955A1 (en) Chemical compounds
EP1732618B1 (de) Verfahren zur herstellung eines knochen-implantatmaterials
CN108553691B (zh) 可注射自固化人工骨修复材料及其制备方法
Mao et al. Preparation and properties of α-calcium sulphate hemihydrate and β-tricalcium phosphate bone substitute
Shao et al. Polarized hydroxyapatite/BaTiO3 scaffolds with bio-inspired porous structure for enhanced bone penetration
LIu Porous hydroxyapatite bioceramics
EP3946488B1 (en) Collagen matrix or granulate blend of bone substitute material
Malmström et al. Bone ingrowth in zirconia and hydroxyapatite scaffolds with identical macroporosity
KR100556054B1 (ko) 척추골 및 관상골 재생용 이식재
RU28608U1 (ru) Эндопротез из керамического материала
CN109432493A (zh) 纳米羟基磷灰石涂层多孔钛支架及其制备方法和应用
JPH10167853A (ja) 人工骨材料用の多孔質体セラミックス成形体
US11504447B2 (en) Methods of producing an osteoinductive calcium phosphate material for bone grafting
JP2023512533A (ja) 骨成長及び組織結合のさらなる向上を目的とする、内外吸収性を備えた生体吸収性インプラント並びにその製造方法
KR20110129007A (ko) 과립형 다공성 뼈이식재 및 그 제조 방법
DE19945529A1 (de) Implantat zur funktionserhaltenden Rekonstruktion von Skelettdefekten und Verfahren für die Herstellung
CN115105641B (zh) 一种可骨性愈合连接的皮下植入材料
RU2174376C2 (ru) Способ спондилодеза

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant