{"product_id":"midwest-fg-557","title":"Midwest - FG - 557","description":"\u003cul id=\"ItemBullet\"\u003e\n\u003cli\u003eFG shank; #557 straight cross-cut fissure; parallel walls\u003c\/li\u003e\n\u003cli\u003e1.0mm head diameter; larger than #245 tapered fissure\u003c\/li\u003e\n\u003cli\u003eTungsten carbide; 3x stronger than stainless steel\u003c\/li\u003e\n\u003cli\u003eHigh concentricity; no chatter; smooth accurate cutting\u003c\/li\u003e\n\u003cli\u003eOptimum durability and sharpness; multiple uses\u003c\/li\u003e\n\u003cli\u003eQuantity: 100 per Pack\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp id=\"LongDesc\" class=\"richp\"\u003eMidwest Carbide Bur, FG, Straight Cross-Cut Fissure, #557 is used for cavity preparation requiring parallel cavity walls, crown and bridge tooth preparation steps requiring flat floors and parallel axial walls, slot preparation for indirect restoration placement, finishing and refining of cavity and preparation walls where the straight parallel-sided bur geometry provides the flat lateral cutting profile that tapered bur geometries cannot deliver at the preparation wall surfaces. At 1.0mm head diameter, the #557 is slightly wider than the #245 cross-cut tapered fissure, providing a larger cutting surface area per lateral pass that makes it suited for wall finishing, box floor refinement, and parallel wall extension steps where the broader diameter covers more surface per stroke than a narrower tapered bur without the additional passes required when using the smaller diameter format.\u003cbr\u003e\u003cbr\u003eRestorative dentists and prosthodontists who use straight fissure burs for parallel wall cavity preparation, crown preparation finishing, and cavity wall refinement find Midwest Carbide Bur #557 the tungsten carbide straight cross-cut fissure FG bur for their active restorative and prosthodontic operatory supply.\n?\nEach pack contains 100 individual FG #557 carbide burs in a clinic pack format providing a substantial operatory bur supply for active daily restorative and prosthodontic use. Tungsten carbide construction provides three times the hardness of stainless steel at the cutting flute surfaces, maintaining the sharpness of the straight cross-cut fissure geometry across the preparation sequence and through multiple uses before cutting efficiency declines to the point of replacement. Clinic pack quantity of 100 supports the single-use or limited-use bur replacement protocols that infection control and cutting efficiency standards recommend for high-volume practices, providing sufficient supply to maintain consistent cutting performance across the full daily schedule.\n?\nMidwest Carbide Bur #557 works through its straight parallel-sided head geometry where the bur head maintains a consistent 1.0mm diameter from tip to shoulder, producing parallel lateral wall cuts as the bur is used against preparation walls, delivering the flat, parallel surface that straight fissure bur geometry is specifically designed to create at cavity and preparation walls where tapered geometries would produce divergent walls at the same working depth.\u003cbr\u003e\u003cbr\u003eCross-cut flutes on the lateral surfaces of the straight bur head provide bi-directional cutting capability during lateral wall preparation, cutting on both the push and pull stroke across the preparation surface for efficient wall finishing and extension without requiring repeated uni-directional passes to achieve the same surface coverage. High concentricity achieved through meticulous manufacturing precision keeps the bur rotating on its intended axis without eccentric wobble during high-speed rotation, eliminating chatter and vibration at the cutting head that imprecise manufacture introduces during active preparation and producing the smooth, accurate preparation walls that restorative and prosthodontic technique requires.\n?\nRestorative dentists preparing Class II composite restorations where parallel proximal box walls are the design goal find the #557 straight fissure geometry produces the parallel box walls in a single bur without the tapered divergence that the #245 introduces at the proximal box walls during preparation. Prosthodontists preparing anterior and posterior teeth for full-coverage ceramic and metal-ceramic crowns find the straight fissure bur useful for axial wall refinement and finishing steps where parallel axial wall geometry is required for adequate restoration path of insertion and marginal fit.\n?\nMidwest Carbide Bur, FG, Straight Cross-Cut Fissure, #557 gives dental practices a tungsten carbide, high-concentricity, chatter-free FG clinic pack bur in the 1.0mm #557 straight cross-cut fissure geometry for parallel wall cavity preparation, crown preparation finishing, and cavity wall refinement across restorative and prosthodontic posterior preparation workflows, in a 100-count pack suited for active daily clinical use.\u003cbr\u003e\u003cbr\u003eFor dental offices ordering FG carbide bur supplies for restorative and prosthodontic operatories, the Midwest #557 clinic pack delivers the straight fissure precision, tungsten carbide durability, and parallel wall performance that consistent posterior and crown preparation requires.\u003c\/p\u003e","brand":"Midwest","offers":[{"title":"FG \/ Straight Cross Cut Fissure \/ 557","offer_id":47373956186290,"sku":"MI-FG557","price":102.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/7747\/2690\/files\/31439_main.webp?v=1777663910","url":"https:\/\/beyond.frontierdental.com\/products\/midwest-fg-557","provider":"Beyond","version":"1.0","type":"link"}