Some confusion with a few viewers: "The point of bur entry is within the incisogingival dimension of the carious lesion or defective restoration and as close the the adjacent tooth as possible without contacting it. Direct the bur PERPENDICULAR (90 degrees) to the enamel surface..." Sturdevant, "The Art and Science of Operative Dentistry" Angling the bur at a 45 degree angle undermines the incisal enamel.
One more thing: For an MF (facial approach) the bur is initiated at a 45 degree angle and the facial enamel is left undermined, but this works because the facial surface isn't under function. This is done primarily for esthetic reasons.
Hi Dr. Stevenson, we were taught that gingival clearance needs to be .5mm since that’s what the CDCA requirements are. I’m not sure what the other licensures requirements are though. Also thank you for this video. It was truly helpful.
Hi Dr.Stevenson thank you for your great videos; could you please make a video of veneer composite techniques for colored teeth with no shell I mean direct composite veneer . Thank you❤️
Hello Dr. Stevenson. Thank you so much for your eloquence. I’m preparing for the ADEX and the DTX and RTX are so brittle that the hatchets fracture the teeth. Any recommendations on how to get rid of the beaks without the hatchets AND without touching the adjacent tooth?
Super sharp hatchets - only chipping small sections at a time. Using mostly the diamond burs. The 8850-102 fine diamond works well to smooth proximal walls which are irregular.
AWESOME DEMONSTRATION! Thank you so much for sharing your knowledge! It's so helpful to us dental students What RPM did you set the electric motor while you did this demonstration without water?
It was done with an air driven handpick, but when we use electric I prep at full speed for the majority and then slow to 5,000 or sometimes less for refinement. Thank you
Thank you for all the great tutorials! Just curious if you'd be able to make a video on a class III DL prep on either #6 or #11? These specific preps are very challenging for me due to the morphology of the canines, especially because the distal contacts are so short on our Acadental typodonts.
Great content. You should do a full series of preparations. I think the summary of instruments and sequence is a really nice idea - so much choice and little direction out there.
Hello Dr. Stevenson Excellent demonstration! very informative and comprehensive Can I request you to demonstrate a Class 4 composite cavity preparation? Much appreciated!
This is great video. Do you post videos for placing the restoration? 8 ML is an intricate fill. I do appreciate educational videos like this. I'm an EFDA student, and I do try to find as much as I can to help broaden my skill for this type for preparation. Thank you.
I want ask doctor about doing class 3 composite restoration in two caries crowded teeth when you have no any space intraproxmal between the teeth when you can't place TEFLON . And thanks doctor I benefited from your wonderful educational channel a lot
There is this thing I am confused about. I was always taught to always use diamond burs to prep the enamel but I see a lot of US dentists to use those high speed carbide burs, whether it is crown prep and now a cavity. Could you please talk more about thee difference? Doesnt the bur have rather shattering effect?
In the early days of operative dentistry, carbide steel was the only technology known to make burs. It wasn't until much later, in the 1970's and 80's that diamonds really become commonplace in dental practices and textbooks. The more recent development of operative diamonds has taken some time to catch on, and although great for less chatter when penetrating enamel, they are relatively costly and not as precise dimensionally compared to carbides. If you were to peruse the two most significant Operative texts in the US - by Sturdevant and Summitt, you'll see that the carbide remains as the go to instrument for conservative preparations.
Dear Dr. Stevenson, If the hand instrument provided (enamel hatchet) is of 1.5 mm, should the cavity still be at 1.5 mm size for DL on #9? Sometimes while practicing with a constraint of the provided hand instrument, I end up making the overall prep of 2mm. Could you please share how to keep it at just 1.5 mm and still be able to use that 1.5 mm hatchet? Thank you for this amazing video. Best regards, Adi
With a 1.5 mm hatchet this is very difficult - it will most always be at least 0.1 mm more than the width of the hatchet. Sometimes, you may wedge and create some separation and then it will fit easily...
no need for class III's that are approached from the lingual and do not extend facially - lots of enamel exists for retention, and blend for esthetics is not critical on the lingual. Finally, the thin area of composite created by a bevel is more susceptible to fracture from occlusion...Bevels for class IVs are essential.
Im curious can this be done on the central incisors all across. I have a decay/tartar likely a cavity aswell it looks like a brownish line on the backside of my central incisors. I have no real tooth pain, feel irritation mostly but no sensitivity to hot or cold. Hopefully tomorrow I can go to my dentist and they can get a good look at it. I am praying a simple filling will fix my issue and not need to get a crown/root canal/ tooth extraction.
Yes, composite restorations may be a good option for you. If your problem is due to wear from grinding a night guard may also be suggested or even a sleep study - sleep disordered breathing and grinding are high correlated.
Why is it that when viewed proximally, the facial wall is not parallel to the lingual surface of the tooth? Is it meant to be Parallel to the long axis of the tooth? Thank you!
The tooth is triangular as viewed from the proximal and the lingual wall and facial wall are converging, not parallel. The facial wall should attempt to parallel the facial wall. Thank you for the question!
Thank you so much,you are a great tutor I have question when we open contact in class 2 can we use interproximal bur or not? Can't we use inverted cone , enamel hatchet?
I would not use an inverted cone for composites due to the sharp line angles created with this bur. I'd use an enamel hatchet and be careful not to create a sharp internal line angle. Interproximal bur like a 169L, yes these are great. Thank you for the questions!
Hi Dr. Stevenson. Thank you so much for making these incredibly helpful videos. Your videos are an online school for many like myself who get inspiration from your work. Regarding restorative section of CDCA, the guidelines say that the examiners approve the diagnosis of the candidates before they can permit the candidates to proceed with the preparation. Can you please shed some light on the kind of diagnosis CDCA is expecting from candidates for the carious teeth? Thank you
Crisp and clear knowledge 👌 . I have 2 ques: 1. Which operator position would you suggest to prepare class 3 cavity on Distolingual surface of tooth no. 12 ( first quadrant lateral incisor)? I find it difficult to access this surface while keeping the bur perpendicular to tooth and using a hatchet to smooth the walls feels impossible. 2. I am currently using 3.5x magnification for restorative work required for the exam. Do you think i should switch to 4x or 4.5x to make my work more intricate for the examiner to check 😅 what according to you will be the sweetspot for magnification for a dental student?
1. Use the 11 O'Clock position but have the patient turn away from you - this help. 2. I siwtched from 2.5x to 4.5 x after two years and then 2 years after that ramped up to 6x. I also use a microscope. If you can, push the mag as high as you can - you'll quickly adapt. 4.5x isn't that high, so you should do well.
@@StevensonDentalSolutions I see what your saying, I just used the 330 on my practical today and it did the trick for a very smooth surface with rounded internal line angles.
Bevels on the lingual of small class IIIs are no longer the standard taught in most dental schools. None of the national boards required them neither the WREB nor the ADEX. I have not been placing bevels for about 15 years. However when the class III preparation is large and extends onto the facial bevels are mandatory for retention and aesthetics.
Bevels are rarely employed anymore on class III's unless: 1. they extend onto the facial and require an esthetic blend, 2. The are large and require additional retention. The US licensing exams not only don't require them, but would prefer they not be beveled. When a bevel IS indicated, full enamel thickness, followed by an infinity bevel or starburst is great for facial surfaces.
Hello Dr. Stevenson. Thank you so much for the video.. was very informative and helpful. My question is, I am supposed to do a class III restoration involving the labial, mesial and palatial walls. In this situation, do I start my prep from the palatial or labial surface? Any other particular points I need to keep in mind while making this preparation? Thank you in advance.
Hello doctor, thank you very much for your effort. Can you explain class 3for amalgam at distal of the canine? You are creative in explaining Your followers from Iraq🌷
Hi Dr Stevenson, I have a question which might sound stupid. For all preparation of teeth ,from examiner point of view, what power loupes you recommend for practice? I got two loupes (3x and 6x) and my preparation seems very clumsy under 6x which seems fine and smooth under 3x. If we know what power loupes examiner will be using for marking, it'll be very helpful for students. Thanks...
Great question! Most dental school faculty and WREB/NERB examiners use 3.5x - 4.5x loupes. If the prep is smooth at 3.5x, it will always look less smooth at 6x. Using 6x takes many hours of practice and isn't initially practical. Do the best you can at 3.5x and you'll be in the "Green Zone" if you've met the criteria.
Great Questions! Thank you. Bevels are no longer in favor for small preps with no esthetic margin concerns. If the prep has ample retention and has no need to be "esthetically blended" with the use of a bevel, a bevel is not used. The bevel would not only remove tooth structure and it would render composite susceptible to fracture (as it is thin) due to occlusal contacts. Note: both the WREB and ADEX dental licensure exams removed the bevel requirement on the class III several years ago, in keeping with the science and teaching practices within the US. IF, the prep extended onto the facial, we would bevel the facial margin (esthetic blending) or IF the prep were large and needing retention, we would bevel all accessible margins. Bevels aren't contra-indicated in all preps, rather the algorithm for their use is more sophisticated. Dr. Stevenson
hi doc, which chair position would you suggest for preparing class 3 on mandibular canines both left and right , if we are only allowed to be between 9 - 12 o clock?
@@StevensonDentalSolutions it's a bit difficult to approach the canine in 3 quadrant , i will try turning the head so i could get to a comfortable hand position . Thankyou doc , knowing i have someone to reach to for help in problematic situations means alot 🙏
Most of us are migrating away from bevels when they don't add to the esthetics or significantly to the retention of the case. With class 3's which are prepped from the lingual, a bevel isn't helping enough to justify the additional enamel removal.
This just made my life as a dentistry student 1000 times better. Thank you.
So great to receive this message! Thank you.
never feel comfident with my preparation before watching this video, thank you for the education Dr. stevenson
Thank you! Best wishes
Thank you doc,the best dental tutorials on RUclips are provided by this channel❤️
Awesome! Thank you
Some confusion with a few viewers: "The point of bur entry is within the incisogingival dimension of the carious lesion or defective restoration and as close the the adjacent tooth as possible without contacting it. Direct the bur PERPENDICULAR (90 degrees) to the enamel surface..." Sturdevant, "The Art and Science of Operative Dentistry" Angling the bur at a 45 degree angle undermines the incisal enamel.
One more thing: For an MF (facial approach) the bur is initiated at a 45 degree angle and the facial enamel is left undermined, but this works because the facial surface isn't under function. This is done primarily for esthetic reasons.
that box looks perfect
Oh, thank you
So clear. Brilliant. Where have you been all my dental school days?
Thank you! Best wishes, Dr. S
master of dentistry Dr. Stevenson
Excellent tips for licensure! Thanks!!
Such an owesome demonstration . I enjoyed a lot and learned many technical tips.
Great! Thank you for watching.
hi Mr. Stevenson, your restorative videos are great! thanks from Turkey
Loved this! Super informative for my next skills assessment. Thank you Dr. Stevenson!
Yes! My pleasure!
Class III restoration video would be amazing!
Love your videos and wish you were still here at UCLA!
Will do! Thank you
Hello Dr Stevenson, can you please provide a video for Class 4 composite restoration as well?? Thanks.
He has Class IV composites on this channel :) i know this comment is old but just in case !
Very neat work Dr Stevenson!! Always a fan!
You make it look easily. Loved it
Thank you - all the best, Dr. S
Hi Dr. Stevenson, we were taught that gingival clearance needs to be .5mm since that’s what the CDCA requirements are. I’m not sure what the other licensures requirements are though. Also thank you for this video. It was truly helpful.
Wonderfully demonstrated & explained!
Thank you!
Your restorative videos are the best! Do you have any videos on complex composites or amalgams?
Awesome video. Thanks doc!
Great video Dr. Stevenson. Very comprehensive and informative. Thanks for sharing.
Thanks again!
Love everything about this video. Thank you!
Thank you.
Would you please make a video show us the correct use for amiror in the indirect position.....❤thank you doctor
dental ergonomics video in the video library
Thank you sir for the best tutorials.please make videos on root canal treatment procedures as well.
We have so many requests - will try!
Hi Dr.Stevenson thank you for your great videos; could you please make a video of veneer composite techniques for colored teeth with no shell I mean direct composite veneer
. Thank you❤️
okay
Thank you for this great effort ♥🌹
Hello Dr. Stevenson. Thank you so much for your eloquence. I’m preparing for the ADEX and the DTX and RTX are so brittle that the hatchets fracture the teeth. Any recommendations on how to get rid of the beaks without the hatchets AND without touching the adjacent tooth?
Super sharp hatchets - only chipping small sections at a time. Using mostly the diamond burs. The 8850-102 fine diamond works well to smooth proximal walls which are irregular.
Excellent explanation!
Thank you - glad you liked it!
our teacher just put us in the lab asking for a black 3 thank you so much for this video i have no idea what im doing😭
U r nailing it Dr... just..make some theoretical vidoes.restorative will be fun..
Thanks - will do!
Hello Dr. Will you please share a video showing composite restoration procedure in this Class III prep?
AWESOME DEMONSTRATION! Thank you so much for sharing your knowledge! It's so helpful to us dental students
What RPM did you set the electric motor while you did this demonstration without water?
It was done with an air driven handpick, but when we use electric I prep at full speed for the majority and then slow to 5,000 or sometimes less for refinement. Thank you
Hi, can you please share the facial extension/ depth of the prep? At how much mm will the adjacent contact break easily? Thanks
The typical class III lingual approach extends 2-3 mm towards the facial. When viewed from the facial, the proximal contact will be barely broken.
Thank you for your very informative videos. Could you please mention about the size of diamond burs if we need to use them?
Yes I can: the 330D is 2 mm long and 0.8 mm at the tip
Thank you Dr!
My Pleasure!
Thank you for all the great tutorials! Just curious if you'd be able to make a video on a class III DL prep on either #6 or #11? These specific preps are very challenging for me due to the morphology of the canines, especially because the distal contacts are so short on our Acadental typodonts.
Will do!
Great content. You should do a full series of preparations. I think the summary of instruments and sequence is a really nice idea - so much choice and little direction out there.
Thank you. Great idea. Stay tuned!
Hello Dr. Stevenson
Excellent demonstration! very informative and comprehensive
Can I request you to demonstrate a Class 4 composite cavity preparation?
Much appreciated!
you got it!
vielen Dank für perfekte erklärung.
You are welcome!
This is great video. Do you post videos for placing the restoration? 8 ML is an intricate fill. I do appreciate educational videos like this. I'm an EFDA student, and I do try to find as much as I can to help broaden my skill for this type for preparation. Thank you.
I will add a video on Class III composite restoration - thank you!
Thank you so much!!!!
You got it!
I have my competency in an hour… I’m hoping I can get through for this 🙏
wishing you the best!
I want ask doctor about doing class 3 composite restoration in two caries crowded teeth when you have no any space intraproxmal between the teeth when you can't place TEFLON . And thanks doctor I benefited from your wonderful educational channel a lot
Wedge, then use plastic mylar - thank you!
Thanks docter i get mor education in your vedio once again Thanks
Great - thank yøu for watching.
There is this thing I am confused about. I was always taught to always use diamond burs to prep the enamel but I see a lot of US dentists to use those high speed carbide burs, whether it is crown prep and now a cavity. Could you please talk more about thee difference? Doesnt the bur have rather shattering effect?
In the early days of operative dentistry, carbide steel was the only technology known to make burs. It wasn't until much later, in the 1970's and 80's that diamonds really become commonplace in dental practices and textbooks. The more recent development of operative diamonds has taken some time to catch on, and although great for less chatter when penetrating enamel, they are relatively costly and not as precise dimensionally compared to carbides. If you were to peruse the two most significant Operative texts in the US - by Sturdevant and Summitt, you'll see that the carbide remains as the go to instrument for conservative preparations.
Thank you a lot
Can you please make video about endodontic access of simulated upper molar
We are planning a series on endo - coming soon - thank you!
We need class IV , V & VI cavity preparation please 🙏🏽🙃
Class V series coming soon! I have class IV in the video library.
Thanks so much🌹🌹👍
You're welcome 😊
Perfection✨
Great video as usual!
Would you open the incisal contact?
No - unless caries dictated this. Helps maintain the contact and since the access is great - no worries about composite sealing...
Excellent. Thank you
Great thank you for viewing.
Could you please made demo about molar endo acess on endo translucent root ?
Hello can you explain how to take x-ray of teeth with protaber namod machien?!..thanks!
Hi Doc
Can u do a finishing and polishing demonstration video
Will do
Thanks very much for the brilliant explanation. Do we need to flare the incisl wall to follow enamel rods?
Slightly yes. Thank you.
Dear Dr. Stevenson,
If the hand instrument provided (enamel hatchet) is of 1.5 mm, should the cavity still be at 1.5 mm size for DL on #9? Sometimes while practicing with a constraint of the provided hand instrument, I end up making the overall prep of 2mm. Could you please share how to keep it at just 1.5 mm and still be able to use that 1.5 mm hatchet?
Thank you for this amazing video.
Best regards,
Adi
Is it acceptable if the facial extension gets near 2mm as well?
With a 1.5 mm hatchet this is very difficult - it will most always be at least 0.1 mm more than the width of the hatchet. Sometimes, you may wedge and create some separation and then it will fit easily...
Thanks doc you are amazing
Thank you Doctor!
Can you mention the dimensions of the cavity?
2 mm tall by 1.25 mm axially and enough facially to break the facial contact by 0.3 mm - or about 2.5 mm facially.
HI, can you please make a video explaining class 3 cavity and its restoration for amalgam
Oh, that's a rare restoration but I'll try!
@@StevensonDentalSolutions thankyou so much, it'll be of great help.
Thank you doc
My pleasure
Thanks a lot Dr Stevenson you are awesome.
I ahve question about Class 2 Composite Preparation. How to prepare it?
I will post new videos on this topic - thank you!
Thank you so much
Always happy to help!
Totally amazing! :)
Thank you Doctor!
Thanks Dr , but why not bevel ?
no need for class III's that are approached from the lingual and do not extend facially - lots of enamel exists for retention, and blend for esthetics is not critical on the lingual. Finally, the thin area of composite created by a bevel is more susceptible to fracture from occlusion...Bevels for class IVs are essential.
Im curious can this be done on the central incisors all across. I have a decay/tartar likely a cavity aswell it looks like a brownish line on the backside of my central incisors.
I have no real tooth pain, feel irritation mostly but no sensitivity to hot or cold. Hopefully tomorrow I can go to my dentist and they can get a good look at it.
I am praying a simple filling will fix my issue and not need to get a crown/root canal/ tooth extraction.
Yes, composite restorations may be a good option for you. If your problem is due to wear from grinding a night guard may also be suggested or even a sleep study - sleep disordered breathing and grinding are high correlated.
Why is it that when viewed proximally, the facial wall is not parallel to the lingual surface of the tooth? Is it meant to be Parallel to the long axis of the tooth? Thank you!
The tooth is triangular as viewed from the proximal and the lingual wall and facial wall are converging, not parallel. The facial wall should attempt to parallel the facial wall. Thank you for the question!
@@StevensonDentalSolutionsThank you! Damn, i thought the box prep should have parallel walls...like an actual symmetrical box.🤦
@@James-ky7ev I hear you!
hi dr stevenson, is axial depth in a mesiodistal direction or faciolingual dimension?
mesiodistal. The faciolingual dimension is referred to as "extension facially
thanks a lot doctor !!!
Thank you for videos
My peasure!
Love this
Thank you!
Thank you so much,you are a great tutor
I have question when we open contact in class 2 can we use interproximal bur or not?
Can't we use inverted cone , enamel hatchet?
I would not use an inverted cone for composites due to the sharp line angles created with this bur. I'd use an enamel hatchet and be careful not to create a sharp internal line angle. Interproximal bur like a 169L, yes these are great. Thank you for the questions!
Very good.
Hi Dr. Stevenson. Thank you so much for making these incredibly helpful videos. Your videos are an online school for many like myself who get inspiration from your work. Regarding restorative section of CDCA, the guidelines say that the examiners approve the diagnosis of the candidates before they can permit the candidates to proceed with the preparation. Can you please shed some light on the kind of diagnosis CDCA is expecting from candidates for the carious teeth? Thank you
"Tooth #20 mesial caries", or "Tooth #10 distal caries", etc...(these are just examples of diagnoses)
@@StevensonDentalSolutions 👍 thank you so much 🙏
Sir can u please tell us about , 16 cavity prepration involving oblique ridge
I do have an MOD for a maxillary first molar - is this what you wanted? Check out the video library...
@@StevensonDentalSolutions ok sir..
Crisp and clear knowledge 👌 . I have 2 ques:
1. Which operator position would you suggest to prepare class 3 cavity on Distolingual surface of tooth no. 12 ( first quadrant lateral incisor)? I find it difficult to access this surface while keeping the bur perpendicular to tooth and using a hatchet to smooth the walls feels impossible.
2. I am currently using 3.5x magnification for restorative work required for the exam. Do you think i should switch to 4x or 4.5x to make my work more intricate for the examiner to check 😅 what according to you will be the sweetspot for magnification for a dental student?
1. Use the 11 O'Clock position but have the patient turn away from you - this help. 2. I siwtched from 2.5x to 4.5 x after two years and then 2 years after that ramped up to 6x. I also use a microscope. If you can, push the mag as high as you can - you'll quickly adapt. 4.5x isn't that high, so you should do well.
@@StevensonDentalSolutions Your guidance is so helpful. Thankyou 🙏
@@sahilbhalla389 My pleasure - Happy New Year! Dr. S
@@StevensonDentalSolutions Happy new year to you as well 🥳
Very good . Pl do post a class 4 composite restoration vedio
Coming - half way done
Can you use a 56 carbide rather than the 329? I find it gives me a flat, smooth, facial wall.
The 330RGS does this too and avoids sharp line angles.
@@StevensonDentalSolutions I see what your saying, I just used the 330 on my practical today and it did the trick for a very smooth surface with rounded internal line angles.
@@choochd Awesome
Hi Dr. Stevenson! Great video just had a quick question. What about the bevel is supposed to be placed on the cavosurface margin of the preparation?
Bevels on the lingual of small class IIIs are no longer the standard taught in most dental schools. None of the national boards required them neither the WREB nor the ADEX. I have not been placing bevels for about 15 years. However when the class III preparation is large and extends onto the facial bevels are mandatory for retention and aesthetics.
Thanks doc very helpfull
Great! My pleasure
Thanks Dr
Thank you❤😍
My pleasure!
What type of bevel is indicated on class 3 Cavity ..I think it's long bevel ..Kindly 🙏🏾 reply ..
Bevels are rarely employed anymore on class III's unless: 1. they extend onto the facial and require an esthetic blend, 2. The are large and require additional retention. The US licensing exams not only don't require them, but would prefer they not be beveled. When a bevel IS indicated, full enamel thickness, followed by an infinity bevel or starburst is great for facial surfaces.
What can we use to protect adjacent teeth and not affect visibility? Do u recommended use of 45 degree hand piece for distal?
Thanks a lot
Please make such a video about class5
hara. hv class 5 are easier
Hello Dr. Stevenson. Thank you so much for the video.. was very informative and helpful.
My question is, I am supposed to do a class III restoration involving the labial, mesial and palatial walls. In this situation, do I start my prep from the palatial or labial surface? Any other particular points I need to keep in mind while making this preparation? Thank you in advance.
Start the prep where the least amount of tooth will be removed. Usually lingual (not palatal) access is the most common.
what to do if i dont have a hachet in the exam? wich instrument can i use?
Hi - use a flame shaped carbide - just the tip to remove the lips of enamel. It's harder to do but it works. Best wishes!
@@StevensonDentalSolutionsthanks a lot for your answer.
@@qusaialrawas1385 Of course, happy to help
Thank you
My pleasure Doctor
Could u tell me where u re dental school? Thank you doc
I teach at my own private facility in San Dimas, California, USA. www.stevensondentalsolutions.com
Thanks alot....
you are amazing
SO nice of you - thank you for watching.
Hello doctor, thank you very much for your effort. Can you explain class 3for amalgam at distal of the canine?
You are creative in explaining
Your followers from Iraq🌷
I will make a video! Thank you my Iraqi friends!
@@StevensonDentalSolutions Thank you very much for your kindness🌹🌹
Hii there
You are owsum Dr.S thanks for the video
Hi Dr Stevenson, I have a question which might sound stupid. For all preparation of teeth ,from examiner point of view, what power loupes you recommend for practice? I got two loupes (3x and 6x) and my preparation seems very clumsy under 6x which seems fine and smooth under 3x. If we know what power loupes examiner will be using for marking, it'll be very helpful for students. Thanks...
Great question! Most dental school faculty and WREB/NERB examiners use 3.5x - 4.5x loupes. If the prep is smooth at 3.5x, it will always look less smooth at 6x. Using 6x takes many hours of practice and isn't initially practical. Do the best you can at 3.5x and you'll be in the "Green Zone" if you've met the criteria.
Thanks heaps Dr Stevenson for clearing doubt.
don't we need to make pear shape ?
Usually rectangular is enough. I'm not familiar with the pear shaped design. Sorry.
@@StevensonDentalSolutions ok..thanks
What is rgs 1,what is rgs 2
stevensondentalsolutions.com/shop/rgs-1-2/
Hi Dr. Stevenson
Would u please demonstrate the differences between class ll composite preparation with the class ll amalgam.
Thanks
Curious why no bevel here.
Great Questions! Thank you. Bevels are no longer in favor for small preps with no esthetic margin concerns. If the prep has ample retention and has no need to be "esthetically blended" with the use of a bevel, a bevel is not used. The bevel would not only remove tooth structure and it would render composite susceptible to fracture (as it is thin) due to occlusal contacts. Note: both the WREB and ADEX dental licensure exams removed the bevel requirement on the class III several years ago, in keeping with the science and teaching practices within the US. IF, the prep extended onto the facial, we would bevel the facial margin (esthetic blending) or IF the prep were large and needing retention, we would bevel all accessible margins. Bevels aren't contra-indicated in all preps, rather the algorithm for their use is more sophisticated. Dr. Stevenson
Thank you for the detailed repose Dr. Stevenson!
@@ThienNguyen-wh1fz My pleasure!
perfect
Nice of you to say.
hi doc, which chair position would you suggest for preparing class 3 on mandibular canines both left and right , if we are only allowed to be between 9 - 12 o clock?
I think that 9 O'clock would be great.
@@StevensonDentalSolutions it's a bit difficult to approach the canine in 3 quadrant , i will try turning the head so i could get to a comfortable hand position . Thankyou doc , knowing i have someone to reach to for help in problematic situations means alot 🙏
Can you please make a vedio about class V
Will do - I have several different techniques - will make a patient video soon!
What is RGS SIR??
The RGS in the logo is my initials Richard Gray Stevenson. Thank you!
Hi Dr Stevenson! Great video, Is this the conventional class iii prep? Why did we not place a bevel here, thanks again. Your videos are awesome
Most of us are migrating away from bevels when they don't add to the esthetics or significantly to the retention of the case. With class 3's which are prepped from the lingual, a bevel isn't helping enough to justify the additional enamel removal.