Overview
Leak-proof dental stone is a modified calcium sulfate hemihydrate engineered for dental applications where moisture resistance is critical. Unlike standard dental plasters, it incorporates hydrophobic additives to minimize water absorption during setting, ensuring dimensional accuracy in humid environments. Developed primarily for prosthodontics, this material meets ISO 6873 standards for Type IV dental stones. Its optimized particle size distribution allows for smooth mixing and detailed reproduction of dental impressions, making it indispensable in crown/bridge fabrication and orthodontic model work.
Physical and Chemical Properties
The material's hemihydrate form (CaSO₄·½H₂O) undergoes controlled rehydration to form dihydrate crystals, yielding a dense microstructure with compressive strength exceeding 50 MPa. Its expansion coefficient is typically 0.08%-0.12%, significantly lower than conventional plasters. Key additives include alkyl silanes or polymer coatings that reduce surface energy, creating water-repellent properties without compromising working time. The setting time ranges from 8-12 minutes, adjustable with potassium sulfate accelerators or borate retarders.
Main Applications
In fixed prosthodontics, leak-proof dental stone is the material of choice for master casts requiring repeated removal of temporary crowns. Its moisture stability prevents degradation during prolonged clinical procedures. The material also serves in implantology for analog placement models and CAD/CAM milling bases. Some advanced formulations are compatible with 3D printing binders, expanding applications in digital dentistry workflows.
Safety and Storage
Though chemically inert after setting, the powder form requires dust control measures. NFPA-rated dust collectors are recommended for large-scale milling operations to prevent airborne particulate accumulation. Storage stability is 2-3 years in original moisture-barrier packaging. Once opened, transfer to containers with silica gel desiccants maintains optimal performance. Discard material exhibiting lumping or delayed setting times.
B2B Procurement Guide
Dental laboratories should specify ANSI/ADA Standard No. 25 or ISO 6873 Type IV compliance when ordering. Bulk purchases (50+ kg) often qualify for 15-20% discounts from specialty dental suppliers. For digital workflows, request compatibility data with common scan sprays. Some manufacturers offer trial kits with varying expansion rates (high-strength vs. rapid-set variants) for technique optimization.
Related Manufacturers
- 主营：水泥彩砖、水泥植草砖、护坡砖、水泥路牙石、地面砖、水泥花砖、水泥仿石砖、水磨广场砖、仿大理石砖
- 主营：六棱砖、铺路砖、植草砖、立平石、路面砖、路沿石、河道砖、路缘石、透水砖、渗水砖、盲道砖
- 主营：G603芝麻白、G602芙蓉白、G633芝麻灰、芙蓉白侧牙石厂家供应、G654芝麻黑、火烧板、磨光板、抛光板、荔枝板、喷砂板、拉丝板、斧剁板、踏步板、路缘石、路边石、路沿石、侧石、平石、磨菇石、树池石、树围石、大花花岗岩、黄金麻、G681虾红、中国黑、青石文化石
- 主营：路沿石、火烧板、五莲红路沿石、路牙石、门牌石、汀步石、白麻板材、白麻路沿石、文化石
- 主营：树池石、桥栏杆、干挂板材、五莲花路牙石、路障石球、红火烧板、异型石材、工程板材、楼梯踏步板、灰麻工程板、芝麻黑光板、花岗岩板材、芝麻白火烧板、五莲花路缘石、五莲红路沿石、耐腐蚀石板材、五莲灰路边石、芝麻白路沿石、五莲花干挂板、挡车柱车止石、五莲花路沿石、花岗岩路缘石、五莲花挡车石球
- 主营：芝麻白、五莲花、五莲红、五莲灰路牙石、路沿石、火烧板、地铺石
- 主营：芝麻白、芝麻灰、芝麻黑、道牙石、黄金麻、中国黑、中国红、侧石、青石板、路沿石、广场铺装石、圆柱圆形柱子、广场户外地铺砖、花岗岩、地铺石、干挂石
- 主营：芝麻灰、芝麻白、芝麻黑、菊花黄、火烧板、荔枝板、喷砂板、磨光板、路沿石、路缘石、侧石、平石、黄金麻、新卡麦
- 主营：干挂板、工程板、桥栏板、漏水石、五莲花路牙石、马蹄石、罗马柱、路沿石、红火烧板、楼梯踏步板、花岗岩石材、五莲红板材、芝麻黑路边石、芝麻黑火烧板、耐磨五莲红圆球、花岗岩地砖板材、芝麻白
- 主营：电线杆、雨水盖板、排污检查井、混凝土立牙石、地铺路沿石、圆孔排水管、水泥盖沟板、插口水泥管、圆形雨水井、钢筋排污管、预制检查井、成品检查井、污水排放管、圆形水泥盖板、混凝土排水管、混凝土污水井、装配式雨水井、水泥雨水篦子、混凝土雨水井、灌注桩排水管、预制排水管道、装配式检查井、道路建设水泥管
- 主营：垒墙石、地铺板、大理石、干挂板、黄锈石、地铺石、广场板、路边石、花岗岩、路沿石、石板材、芝麻白、异形石、造景石、火烧板、芝麻灰、台阶板、异型石、踏步板、工程板、裕泰石材、白麻石材、广场地面、天然石材、庭院板材
- 主营：青火砖、透水砖、路沿石、路沿石路牙石、水泥沟盖板、高分子水笆、高分子水槽、生态路面砖、方形树脂井盖、球墨铸铁井盖、倒承式六防井盖、庭院地砖渗水砖
- 主营：芝麻灰、芝麻黑、芝麻白、路牙石、中国黑、桃花红、五莲红、五莲花、五莲灰、灰麻、圆石墩、石球、路沿石、火烧板、火烧石、花岗岩板、大理石板、花岗岩地砖、花岗岩石材、花岗岩、大理石
- 主营：大理石、菠萝面、花岗岩、芝麻灰、水石材、奥特曼米黄、面弹石、黄金麻、水洗石、平缘石、路沿石、工程板、芝麻白、自然面、石烧面、拉丝面s、5d荔枝面、电视背墙、踏步天然、石材圆柱、园林地砖、楼梯踏步、中国黑、白玉兰大理石、成品板
- 主营：芝麻白花岗岩、芝麻灰、路沿石、芝麻灰路沿石