I would not survive dental school without these Stevenson videos. Educators like this are nearly impossible to find. Thank you for your contribution developing future colleagues!
Loved it, i really like the way chisels and hatchets are introduced in the preparation. Maybe we would have an extended video of these instruments deployment in various enamel preparation cases! Thank you doctor !
Let's do some clinical videos on actual patient cases! Videos on clinical situations that stray from ideal, as is the case in every day dentistry, would be great to see!
Thank you so much for your videos! Really helps.. Can you also please tell me that what would be the difference between amalgam and composite prep? Their angle , walls etc! Thank you
Comspoite would have slightly flared exit angles, less clearance (0.2-0.3) rounded internal line angles, and shallower pulpal - just barely into dentin, 1.25 mm
Thank you for a very clear information, I was wondering if you have some videos of a cusp buccal reconstruction with amalgam in uppers premolars ? Thank you in advance for any help and your time.
1. Use the 245 to drop the box to the full length of the flutes. 2. increase the gingival until the contact is broken 3. Increase the buccal and lingual until they are broken - use the hatchet to assist in removing undermined enamel. 4. Deepen the axial wall enough to extend about 0.5 mm into dentin (1.25-1.5 mm total from the outer margin) 5. Sharpen internal line angles with a 169L and enamel hatchet. 6. Smooth the transition from the box to the occlusal ("S" curve) 7. Refine the entire pulpal and vertical walls with an RGS 330. 8. Bevel the axial pulpal line angle to 0.3-0.5 mm with a gingival margin trimmer 9. Place a slight bevel on the gingival wall to remove unsupported enamel, also using a GMT.
Thanks Dr Stevenson. I saw you mentioning divergent mesial wall on this tooth #3. But I was unsure about it once you completed the prep. Was it really there? I am sorry, pls forgive my ignorance.
Why is it that only the wall of the functional cusp has an acute line angle and the non-functional 90 degrees instead of both having acute for retention form?
1. Avoids undermining/weakening the non-functional cusp wall, 2. preserves facial esthetics for maxillary preps, 3. follows natural contours, and 4. allows for a uniform extension from occlusal to gingival. It's an advanced Operative Dentistry principal that was developed by Sturdevant, Markley and others in the 1960's but not known or adopted by several schools that are perhaps less focused on advanced operative dentistry. Interestingly, in the US, several schools were using 557 burs to prep class II amalgams until fairly recently - wow, now that's late adoption of evidenced based principals!
@@StevensonDentalSolutions Wow, that is really fascinating! Well, I guess we're all lucky to have you to instruct us in these principles! One more thing, I sometimes struggle with correctly gauging the correct height/contour of the mesial/distal marginal ridge (sometimes it's too shallow or too excessive). Do you have any tips on ensuring correct anatomical replication? Would it be helpful to compare the marginal ridge height of the adjacent tooth?
@@ryanlam1635 It is helpful and it's also helpful to make a note of the marginal ridge form level - ask yourself: is this higher, level of lower than the adjacent tooth and will the remaining cusp ridges (after pre) help me to develop the ideal form ...
Can I say safely that using only 330 & 245 are greatly enough in all posterior cases and ignoring the inverted & fissure burs ? Thank you in advance Doctor ✨
You can - however, the 330 RGS which is a new bur introduced to dentistry in 2018 accomplishes superior finishing while maintaining the convergence and conservative prep design. It's best to avoid straight fissure burs while completing an amalgam prep (55, 56 ,etc) as they are not designed to maintain convergency. The use of inverted cones (34, 34, etc) is also not recommended as these are too sharp and are not long enough to smooth the vertical walls while smoothing the pulpal or gingival walls. Check out the 330 RGS by Brasseler, or on eBay or on stevensondentalsolutions.com - it's an amazing bur.
I would like to have hatchet and chiesel to avoid hitting the neighbouring tooth but I cant find any one sell them in Egypt ... no one use them here ... how can I get them ?
I would not survive dental school without these Stevenson videos. Educators like this are nearly impossible to find. Thank you for your contribution developing future colleagues!
Thank you!
People said education is expensive, but i said ignorance is far more expensive.
SIR DR.STEVENSON.
MY Greetings from egypt ❤️
You are correct! Thank you.
Excellent video ! U and your videos are the savior for international dentists preparing from bench test Dr. S 🙏🏻😇 sending lot of good wishes your way
Thank you, Doc!
Four words, The Mozart of Dentistry!
Too nice!
Thank you very much for this upload, Dr. Stevenson! As always, your work is inspiring!
Thank you, Doc!
No words to praise you Sir for teaching us excellent Dentistry and God Bless you Sir...,,
Vazhga Vazhamudan...🙏🙏🙏
You are too kind!
Loved it, i really like the way chisels and hatchets are introduced in the preparation. Maybe we would have an extended video of these instruments deployment in various enamel preparation cases! Thank you doctor !
Oh - great idea Doc. I'll put that on my todo list
Don't stop you safed me thank you 💜
Great
Thankyou sir for such an detailed video. Keep going 🙌🏻❣️
Okay - thank you!
Let's do some clinical videos on actual patient cases! Videos on clinical situations that stray from ideal, as is the case in every day dentistry, would be great to see!
Working on it - need to hire a video person...
Stevenson Dental Solutions if I lived in CA I’d help you out with it! :-(
@@ndpitch Thank you for the thought - I have so many great cases I perform regularly that would be of interest to dentists ...
❤️❤️❤️❤️
Thank you!
Doctor Stenvenson, I understand that you can do whatever of these two forms, the purple one or the red one, am I right?. Thank you so much!
Yes, depending on the school..for DO's most cross the oblique ridge as the retention is easier to achieve.
amazing sir
Thank you Doctor.
Thank you
My pleasure Doc
Thank you so much for your videos! Really helps.. Can you also please tell me that what would be the difference between amalgam and composite prep? Their angle , walls etc! Thank you
Comspoite would have slightly flared exit angles, less clearance (0.2-0.3) rounded internal line angles, and shallower pulpal - just barely into dentin, 1.25 mm
Stevenson Dental Solutions Thank you so much!
:)
wonderful
Thank you!
Can you please suggest an outline for Mo extending to the oblique ridge?
czcams.com/video/wB_ulLlT4XA/video.html
Thanks 😄
You are welcome!
Can you show us your method on how to use indirect vision for maxillary class II prep?
I will try - it's a tough one to video tape but will give it a shot!
Thank you for a very clear information, I was wondering if you have some videos of a cusp buccal reconstruction with amalgam in uppers premolars ? Thank you in advance for any help and your time.
Not yet but I'll make one soon!
Stevenson Dental Solutions it would be really amazing, I highly appreciated your work. I am looking forward for the video. Thank you 😊
Thank you doctor , but I don't understand completely the part the preparation of box , can you type the steps in comment for me ??
1. Use the 245 to drop the box to the full length of the flutes.
2. increase the gingival until the contact is broken
3. Increase the buccal and lingual until they are broken - use the hatchet to assist in removing undermined enamel.
4. Deepen the axial wall enough to extend about 0.5 mm into dentin (1.25-1.5 mm total from the outer margin)
5. Sharpen internal line angles with a 169L and enamel hatchet.
6. Smooth the transition from the box to the occlusal ("S" curve)
7. Refine the entire pulpal and vertical walls with an RGS 330.
8. Bevel the axial pulpal line angle to 0.3-0.5 mm with a gingival margin trimmer
9. Place a slight bevel on the gingival wall to remove unsupported enamel, also using a GMT.
Thanks Dr Stevenson. I saw you mentioning divergent mesial wall on this tooth #3. But I was unsure about it once you completed the prep. Was it really there? I am sorry, pls forgive my ignorance.
yes about 3 degrees
After filling teeth again starts to lightly pain , what's the solution?
Usually a failure of the bond - likely requires replacement and strict adherence to protocols
Why is it that only the wall of the functional cusp has an acute line angle and the non-functional 90 degrees instead of both having acute for retention form?
1. Avoids undermining/weakening the non-functional cusp wall, 2. preserves facial esthetics for maxillary preps, 3. follows natural contours, and 4. allows for a uniform extension from occlusal to gingival. It's an advanced Operative Dentistry principal that was developed by Sturdevant, Markley and others in the 1960's but not known or adopted by several schools that are perhaps less focused on advanced operative dentistry. Interestingly, in the US, several schools were using 557 burs to prep class II amalgams until fairly recently - wow, now that's late adoption of evidenced based principals!
@@StevensonDentalSolutions Wow, that is really fascinating! Well, I guess we're all lucky to have you to instruct us in these principles! One more thing, I sometimes struggle with correctly gauging the correct height/contour of the mesial/distal marginal ridge (sometimes it's too shallow or too excessive). Do you have any tips on ensuring correct anatomical replication? Would it be helpful to compare the marginal ridge height of the adjacent tooth?
@@ryanlam1635 It is helpful and it's also helpful to make a note of the marginal ridge form level - ask yourself: is this higher, level of lower than the adjacent tooth and will the remaining cusp ridges (after pre) help me to develop the ideal form ...
@@StevensonDentalSolutions so the marginal ridge of the prepped tooth should be equal in height to the marginal ridge of the adjacent tooth ?
@@ryanlam1635 Usually but not always - best too check and memorize or use a scan, photo or cast to be sure...
Can I say safely that using only 330 & 245 are greatly enough in all posterior cases and ignoring the inverted & fissure burs ?
Thank you in advance Doctor ✨
You can - however, the 330 RGS which is a new bur introduced to dentistry in 2018 accomplishes superior finishing while maintaining the convergence and conservative prep design. It's best to avoid straight fissure burs while completing an amalgam prep (55, 56 ,etc) as they are not designed to maintain convergency. The use of inverted cones (34, 34, etc) is also not recommended as these are too sharp and are not long enough to smooth the vertical walls while smoothing the pulpal or gingival walls. Check out the 330 RGS by Brasseler, or on eBay or on stevensondentalsolutions.com - it's an amazing bur.
Stevenson Dental Solutions Thanks Dr.Steven for your so clear & appreciated reply
@@toto559071 Thank you
I would like to have hatchet and chiesel to avoid hitting the neighbouring tooth but I cant find any one sell them in Egypt ... no one use them here ... how can I get them ?
I wish I knew!