$113.21

• RA latch-type shank; #4 round; larger than #2 at 1.4mm
• 1.4mm diameter; wider caries removal and access openings
• Tungsten carbide; 3x stronger than stainless steel
• High concentricity; no chatter; smooth accurate cutting
• Optimum durability and sharpness; multiple uses
• Quantity: 100 per Pack

Midwest Carbide Bur, RA, Round, #4 is used for caries removal, cavity preparation access opening, removal of old restorative materials, and endodontic pulp chamber access in slow-speed handpiece procedures where the larger 1.4mm head diameter of the #4 round covers more surface area per stroke than the smaller #2 round at 1.0mm, making it the appropriate round bur selection for wider carious lesions, larger existing restorations requiring removal, and access preparation openings where the #2 would require significantly more passes to complete the same excavation or removal area. RA latch-type shank connects to the standard latch-type contra-angle slow-speed handpiece head, placing the #4 round in the slow-speed cutting protocol that restorative dentists use for controlled caries excavation, old material removal, and endodontic access preparation where the reduced rotational speed of the slow-speed handpiece provides better tactile feedback than high-speed cutting during selective tissue removal steps.

Restorative dentists and dental assistants who stock multiple round bur sizes for different lesion dimensions and access requirements find Midwest Carbide Bur RA #4 the correctly sized larger round bur for their active slow-speed operatory supply alongside the smaller #2. ? Each pack contains 100 individual RA #4 carbide burs in a clinic pack format providing a substantial operatory bur supply for active daily restorative and endodontic slow-speed use. Tungsten carbide construction provides three times the hardness of stainless steel at the cutting surfaces, maintaining the sharpness of the round geometry across the excavation and removal sequence and through multiple uses before replacement. Clinic pack quantity of 100 supports single-use or limited-use replacement protocols for high-volume practices, providing sufficient supply to maintain consistent cutting performance across the full daily appointment schedule.

The 1.4mm diameter at #4 provides a noticeably wider cutting head than the 1.0mm #2, allowing each lateral pass across the carious lesion or restoration surface to remove more material per stroke and complete the excavation or removal in fewer total passes. ? Midwest Carbide Bur RA #4 works through the same spherical round head geometry as all round bur formats, presenting a consistently curved cutting surface in all directions from the tip through the equator that allows cutting in any direction without repositioning, with the critical dimensional difference of the 1.4mm diameter providing a larger spherical cutting surface whose greater circumference covers a wider area per stroke at equivalent working depth compared to the smaller #2. The larger diameter also produces wider undercuts and access openings per plunging stroke at equivalent depth, making the #4 the more efficient round bur for access preparation into existing restorations and carious lesions that have already progressed to dimensions exceeding the effective working coverage of the #2 diameter. High concentricity achieved through meticulous manufacturing precision keeps the bur rotating on its intended axis without eccentric wobble, eliminating chatter and vibration during slow-speed rotation and producing the smooth controlled excavation that minimizes unnecessary removal of sound tooth structure adjacent to the carious lesion. ? Restorative dentists removing large amalgam and composite restorations for replacement find the #4 round's 1.4mm diameter covers the broader restoration surface area more efficiently than the #2, reducing the time required to section and remove existing restoration material before beginning the new cavity preparation.

Endodontists and general practitioners performing pulp chamber access on molars with large pulp chambers find the #4 provides the appropriate access opening dimension for the wider pulp floor geometry of posterior molar teeth where the smaller #2 would require extensive additional passes to achieve the same access opening diameter. ? Midwest Carbide Bur, RA, Round, #4 gives dental practices a tungsten carbide, high-concentricity, chatter-free RA clinic pack bur in the 1.4mm #4 round geometry for wider caries removal, larger cavity access openings, extensive old restoration removal, and posterior molar endodontic access across slow-speed handpiece procedures, in a 100-count pack suited for active daily clinical use. For dental offices ordering RA carbide bur supplies for restorative and endodontic slow-speed operatory use, the Midwest RA #4 clinic pack delivers the larger round geometry, tungsten carbide durability, and broader cutting coverage that efficient wider-lesion excavation and restoration removal requires.