Canal stone and mb2 in upper molar

From: Jörg Schröder To: ROOTS Sent: Saturday, October 29, 2005 3:38 AM Subject: [roots] Canal stone and mb2 in upper molar this one came in as an emergency. Tenderness to percussion and pain on warm. After removing the filling ther were several cracks. Adhesive build-up was done and RCT started. First, MB2 seemed to be no problem, as I could see a little groove on the pulpal floor right from the start. But after exploring bthe first 1,5 to 2 mm there was a stop as if there was a wall. So I started to clean and shape the palatinal next. While exploring with a #10 handfile I felt like reaching the apex very easy at one time and after that there was an obsticle some mm before the apex. after more coronal flaring I could see a pulpstone inside the canal which I could move with a microopener but the pulpstone was bigger than the size of the canal. I crushed the stone with a #25 ISO US-File and after being smaller than the canal it plopped out like a fractured instrument. MB2 was still waiting for me ( arrgggh) I took a bur and followed the small fin to the mesial wall and: blood and lots of tissue.I thought i perfed, but after using irrigation I found the next chamber ( I felt like inside a pyramide) Looked like a small area of resorption to me, because the chamber extended to the mesiopalatinal aspect of the tooth. After removing the denti-bridge there were two seperated mesial canals. That has been another proove to me : they (mb2) almost always exist. Sorry Carlos, some are out of focus ; ))))) - Jörg Schröder

Jorg.........Great photos and great documentation. What camera system again....flash? Very well done Jorg.....Glenn Thanks Glenn, Coolpix 4500, halogen 100w, Carr mirrors, White Balance with camera mounted on the scope. Btw, do you know if there is a difference in brightness between the flexible and the rigid carr mirrors. Do they have the same optical performance? - Jörg jorg, there is a small difference between the scratchless and the scratchable. Less light wiht the scratchless due to a small coating layer. I often switch to a scratchable to take a critical photo. there is no difference between flexible and rigid - Bill Thank you Bill - Jörg