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Hi, When using No. 245 bur and holding it perpendicular to the surface, the bur design will create the converged walls. Another way is to hold the straight fissure bur slightly angulated to create the converged walls. However, walls being slightly converged or parallel are both correct.

@@drafnanoalzain ok thank you. Your videos are very helpful and informative. I would like to thank you for your great work and excellent explanations. We use the straight fissure bur. At which step would you recommend doing the convergence? after cutting the central groove or whilst doing it? Would it be possible to perhaps do a video of class 1 using the straight fissure bur ,that would be very helpful, thanks.

@@radwanbeshta2034 I would recommend doing it as a last step in the step of finishing the walls to avoid over converging the walls. Ok, I’ll put it in the plan for the list of new videos to record inshallah

@@drafnanoalzain much appreciated!

@@radwanbeshta2034 you are welcome

البير #245 حتلاقي شكله في دقيقة 1:26. الرواند بير ما راح يخلي شكل الكافيتي إلي نحتاجه. نحتاج cavity with flat floors and converged occlusally walls