Learn how to prep a cavity with the Bioclear Method, using Komet's burs in the Bioclear LD2253 kit.
Dr. David Clark created a procedural video as a guide to using Komet burs from the Bioclear LD2253
kit for a safe and efficient Clark Class II cavity prep. The kit contains six diamond burs – which Dr. Clark prefers for these preps over carbides – because they grind away material, which provides better control.
There are four features of a Clark Class II.
1. A radius wall that becomes tangential to the uncut enamel.
- 2. Dentin preservation – The dentin is only cut into to remove decay.
- 3. Maximizing the enamel rod integration and minimizing the dentin exposure, which reduces pulpal death and post-op sensitivity.
- 4. Engaging the enamel rods at 45 degrees as opposed to parallel with a slot prep so there is no undermined enamel.
To begin, use the 6856
to make an initial penetration through the marginal ridge, maintaining a bridge of enamel between the tooth and its neighboring tooth. The bur in this first step is used for gross decay. Afterwards, assess whether the bur needs redirecting buccally or lingually for continued decay removal to a 4-5 mm depth.
After making an initial penetration, if there’s incipient decay at the Dentin Enamel Junction (DEJ), remove it with the FSD3F. This bur targets site-specific decay removal and breaks contact.
Next, test to see if the decay is removed by probing the area aggressively. All decay at the DEJ must be removed.
Once all decay at the DEJ is removed, use the FSD3F
bur to break the contact on the tooth. If it’s not all removed, re-prep with the 6856
. If it’s all removed, the FSD3F
is used again to cut a convex radius wall on the gingival that blends with the radius wall on the interproximal. This eliminates sharp angles and stress risers.
Use the 6862
if there are deeper cavities. This bur can also refine the radius wall on the interproximal, but not to break the contact initially.
When cutting the radius bevel on the occlusal, Dr. Clark prefers the 8833. This bur is ideal for cutting a convex bevel due to the bur’s concave shape. Cutting a convex radius wall puts the tooth into compression.
Watch Dr. Clark’s full video procedure here:
About The Author
Komet USA’s Content Marketing Specialist
Hannah Bucciarelli has been the content marketing specialist at Komet USA since 2021. She focuses on copywriting, social media management and content management in the dental industry.