Class II Amalgam #19 MO Acadental | Amalgam Preparation Technique

[@KiLLtRoCiTy01]

Doc, this is literally one of the mist beautiful preps I have ever seen.

[@Aestheticdentalcheenel]

👍🤝

[@dentalmitra7864]

Seeing these basic videos makes us feel that these batch of students are lucky to have visual media based guidance to know as well as to prepare for exams unlike us who had to rely solely on 2 D images in text books apart from preclinical demos . All have you to thank for making it happen !

[@StevensonDentalSolutions]

So true, thank you Doc.

[@doctoredable]

May your 1nn buccal extenson serve you well

[@Aisha-mustafa]

​@@StevensonDentalSolutionsء😅😊ء١ءيؤض١ث١١١١١١١١١١١١١١١١١١١1١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١١شث١ششش١1شششث١ق١١ش١١يصيي١ي١يضقضيضثضي١يضيضقي١شيق١ض١1😅1١1١١1ش١ش😅

[@Aisha-mustafa]

جججججش

[@nataliauzunca4864]

I’m old school Russian dentist who try to challenge board exams in Canada.And your explanations are amazing.Hope after watching your videos I can pass my clinical skills exam.Thank you for your help.

[@StevensonDentalSolutions]

Thank you! Best wishes.

[@monaabdelmotelb8005]

Good luck doc, it is really tough. My exam is within a month 😊

[@jaydipkapuriya]

did you clear your exams?

[@nataliauzunca4864]

@@jaydipkapuriya still waiting for result.I will update after release of result

[@nataliauzunca4864]

@@monaabdelmotelb8005 how was your exam?did you pass?

[@yinaxu7279]

Hi, Dr. Stenvenson. I am Xu, one of USC interviewee. I am a big fan of you! Perfect video, I learn a lot from them. Thanks so much!

[@StevensonDentalSolutions]

Thank you!

[@lazarotobias952]

Thank you! I was struggling with this prep on # 30 today (we only had a powerpoint in our school), watching you use the hand instruments the proper way and visualizing it with your drawings definitely helps paint a definitive picture of how this prep should be performed.

[@StevensonDentalSolutions]

Awesome! Thank you.

[@imafirinmalaser]

I hope to make such a smooth preparation one day. Currently learning this in school and oh boy you should see what some of my peers and I are producing hahaha. I've watched this a few times, roughly twice before each preparation I do. It's amazing how each time I'm improving based on what extra details I pick up from your video. Honestly your content is GOLD.

[@StevensonDentalSolutions]

Thank you! Wishing you the best in Dental School and beyond!

[@Smogller]

Thank you very much Dr. Stevenson. I am in first year of dentistry now and your video taught me a lot. The picture was always sharp, the pacing was just right and the part where you drew on iPad was very good for understanding. Good job. I missed the preparation of the S curves though, I would like to see that as well.

[@normanchu2482]

Nice, I was fortunate to meet Dr Warren Johnson and observe some of his his gold foil restorations.

[@ammoula2974]

Amazing! The technics, terminology and the explanation!

[@StevensonDentalSolutions]

Thank you!

[@김동진-h8q]

Your video is helping so many dental students preparing for the national exam in Korea.

[@StevensonDentalSolutions]

I am so happy to read this! Best wishes, Dr. Stevenson

[@dentist-vo9gv]

That’s amazing! 🎉🎉 Your excitement is contagious, and it sounds like you're preparing with the perfect mix of dedication and passion. I'm getting back to the basics to deal with my first patient after half moth ❤ , your fan from Jordan. 🇯🇴

[@StevensonDentalSolutions]

Thank you Doc! Hope to meet you one day. Best, Dr. S

[@eanleongooi1673]

Amazing technique and thanks for sharing Dr. Stevenson.

[@StevensonDentalSolutions]

My pleaseure!

[@vishnubhattacharyya8885]

By far the most detailed and fantastic video explaining the whole thing... Thank you

[@StevensonDentalSolutions]

Thank you Dr. Bhattacharyya - btw do you know Urmi Bhattacharyya? She is my grad student from Bengal...

[@vishnubhattacharyya8885]

@@StevensonDentalSolutions No sir I don't recall ; glad to know you have students here, If you dont mind May I ask you which college is she from maybe that way I might end up being sure about it. Regards.

[@StevensonDentalSolutions]

@@vishnubhattacharyya8885 Manipal

[@vishnubhattacharyya8885]

@@StevensonDentalSolutions Sorry Sir I don't know her Now I am sure of it Thanks for posting the video -Regards.

[@storytime4011]

Can't thank you enough for these amazing preparation videos 🌷

[@StevensonDentalSolutions]

My sincere pleasure!

[@Saahillz]

@19:28 Sir! It is the perfect preparation ngl

[@StevensonDentalSolutions]

thank you - very kind.

[@cocojo9529]

This is beautiful! Thank you so much for sharing

[@StevensonDentalSolutions]

Thank you Doctor

[@annitarazafy4599]

Thank you Doctor, it is very helpful . From Guinea

[@StevensonDentalSolutions]

Thank you! It's great to meet people around the world through dentistry~! Dr. S

[@katiamizzi8230]

Thank you for sharing this video Dr Stevenson. Very helpful.

[@StevensonDentalSolutions]

Thank you, Doc!

[@samiaammar123]

Wow, thank you very much 🫶🏼

[@StevensonDentalSolutions]

My pleasure!!!

[@TS.007]

Thank you dr Stevenson for such a wonderfully explained video! Beautiful preparation!!! Could you please make videos on 700 series?

[@StevensonDentalSolutions]

Will try in the near future - thank you!

[@ranikarunakaran2980]

Thank you very much. Excellently explained. Can not be taught any better. Thank you very much.

[@StevensonDentalSolutions]

Thank you!

[@scottsdaledentistprincessc4744]

Another great video. Thanks for sharing. Very helpful. I liked seeing the difference burs you have on the bur block

[@StevensonDentalSolutions]

Thanks again for your comments.

[@ftmtolooie7976]

thank u so much i couldnt understand the S until i watched ur video

[@StevensonDentalSolutions]

Awesome!

[@fatimaarsalan3202]

Thank you Dr Steven! Brilliant work, I am a fan. Please if you can also make video for amalgam cusp built up with MOD. That would be so helpful for the exams I am undertaking. Regards.

[@StevensonDentalSolutions]

I've heard that this is a popular assignment. I'll try my best.

[@dr.krishanu]

Great video, Helped me a lot 👍. keep making these types of videos

[@StevensonDentalSolutions]

Will do - more to come soon!

[@kipamedia7526]

Thank you for the video it was very helpful

[@StevensonDentalSolutions]

A pleasure - best wishes, Dr. S

[@docali9234]

This is a very nice video and detailed prepararion Thanks alot

[@StevensonDentalSolutions]

Thank you Doc!

[@docali9234]

Can u plz share further classes preps

[@khalidmahmood8589]

Very nive presentation, Thank you so much

[@StevensonDentalSolutions]

My Pleasure!

[@mohsenshakerirad3635]

It was very helpful dr. Thank you 😊

[@sayansarkar1379]

I like the shape of your cavity , nicely done 👍

[@StevensonDentalSolutions]

Thank you

[@gettindentalwithit894]

Woah game changer! Practice tomorrow will be fun 🙌

[@StevensonDentalSolutions]

So nice to receive this comment! Wishing you the best.

[@sarah702]

Thank you very much🙏🏻it was extremely helpful🌸

[@StevensonDentalSolutions]

Great! Thank you for watching.

[@jeeshriyarajan]

Excellent work sir. Very beautifully explained 💯💯

[@StevensonDentalSolutions]

Thank you!

[@drksahil]

Thanks so much Dr Stevenson for this amazing demo of Class 2 amalgam prep, which is a nightmare for many dental students including me. I have one question though, I have been preparing MOD prep and noticed that distobuccal cusp is getting very small after the final preparation coz of extension of proximal box buccally to get enough clearence. I was just wondering is this acceptable or is there any method for distobuccal cusp preservation in order to prevent over reduction of that particular cusp? I hope you got my query, thanks for reading and I will be waiting for your response. Thanks and Regards.

[@shondamarlowe5848]

It came out perfect good job👍🏾

[@StevensonDentalSolutions]

Thank you Doctor

[@حورالموسوي-ك7ذ]

thank you doctor from iraq

[@StevensonDentalSolutions]

My pleasure!

[@bettyabbey1239]

Thank you very much

[@LelouchViBr]

You're a life saver!

[@StevensonDentalSolutions]

So cool to have you say this! Keep up the pursuit!

[@furkann5501]

best class ıı video on youtube

[@StevensonDentalSolutions]

Thank you!

[@siroussarmadi1614]

Thanks it was a great video!

[@StevensonDentalSolutions]

Thank you Doc

[@ghazalehbaghban3165]

Thank you so much for sharing the knowledge and the technique with us doctor! I wish you could also demonstrate a 3/4 mandibular canine preparation for a posterior bridge :)

[@StevensonDentalSolutions]

OOH! Good one - will do! Two choices - pin ledge or grooves? Gold right?

[@ghazalehbaghban3165]

@@StevensonDentalSolutions It is the grooves ! Yes it is gold :) Thank you so much in advance ! So excited about it and can't wait for it !!!

[@shot336]

Great videos as usual. I see you have alot of requests, my wishlist contains a porcelain veneer prep because there are different variations in the literature. Really appreciate it. Thank you so much

[@StevensonDentalSolutions]

Yes - at least 5 different prep designs for different indications and pre-op conditions.

[@shot336]

Indeed and the relatively recent change regarding the finish on the incisal surface ie with bevel or without etc

[@mohammedalbakerhusien7897]

I love your work doctor I student from iraq and always follow your videos thank to your effort.i hope if you slow from your speech please 😅you very speed sorry to more my speech

[@StevensonDentalSolutions]

Okay - you got it!

[@vincentwei6061]

Hi Dr. Stevenson, i am currently in the process of getting my Australian dental registration and i am a big fan of your work...the detail and finishing are amazing to say the least. I was wondering of you could make a video about complex amalgam restorations and cuspal build up. There are a few videos around, but o am sure they wont compare to the artistry you command. Thank you

[@StevensonDentalSolutions]

Okay - will do - would you like an MOD with a MB cusp replacement on a maxillary molar, or an MODL with a DL cusp replacement on a mandibular molar, or something even larger? Two cusps, three cusps?

[@vincentwei6061]

@@StevensonDentalSolutions Thank you for the reply..i am so tempted to say both...hahafa..but amy one you do will be a great learnin learning experience for is all...wish we had you at my dental school.

[@StevensonDentalSolutions]

Hi Doc - the complex amalgam Part 1 and 2 are live now. Thank you for suggesting this topic!

[@vincentwei6061]

@@StevensonDentalSolutions Thank you sir..yes i already got a notification...really excited. Watched part 1 yesterday, amazing as usual. Thank you soo much. Please keep up the great work you doing..!!

[@nadaxxxnnn488]

This is perfectly perfect ♥️♥️

[@jamesmacnaughton8188]

Hey Dr. Stevenson, I love your videos and was wondering, as a fellow microscope user, if you would do some instructional microscope videos? Thank you for sharing your great technique!

[@StevensonDentalSolutions]

Will do - stand by!

[@i2harry]

“Perhaps it’s not a perfect preparation” 🤣🤣🤣

[@chimralyonfire]

amazing ❤

[@StevensonDentalSolutions]

Thank you!

[@amralassas]

Great job dr. 330 RGS is the same as inverted cone bur ?

[@lanalan6110]

Thanks alot for amazing helpful video.plzz upload video for carving amalgam of lower and upper6

[@yarinshilon6619]

amazing! art.

[@StevensonDentalSolutions]

Thank you!

[@nadelamitchell2329]

shoutout sa akong mga classmate diha nga ga tan-aw ani HAHAHAHAHAH

[@AmirHosseinSaffari-ko2zt]

Thank you, Dr. Some references mention that beveling for amalgam can be done only at the axiopulpal line angle. However, you mentioned it can also be done on the gingival seat. I just want to confirm: would beveling in that area compromise the strength of the amalgam?

[@StevensonDentalSolutions]

It's a moderate bevel, about 15-20 degrees and it parallels the enamel rods.

[@katerinalyras8879]

Phenomenal!

[@stepper1323]

This video is so helpful! Thank you for sharing. Do you have any suggestions for other burs we could use to create the S curves if we do not have a 330RGS?

[@spoilsport99]

Pleasee make the indonesian subtitle DR. Stevenson. I am your fan from indonesia. I enjoy your video but i don't really understand what do you say. You make the greatest video of dentistry while i watched.

[@StevensonDentalSolutions]

Okay, you got it!

[@hameedjamal9671]

Hi Dr. Stevenson! How often should we replace the 330 RGS?

[@StevensonDentalSolutions]

After 2-3 preps

[@haiderdurrani16]

Beautiful preparation ❤

[@StevensonDentalSolutions]

Thank you for watching! Dr. S

[@bajablaster69]

Hello Dr, I appreciate your videos. I am curious, how wide is that gingival floor of the box mesial distally? My school requires it to be 1.25 mm but I always find mine is more like 1.5 by the time I get the 245 in there. Thank you!

[@StevensonDentalSolutions]

1.25 mm. Use the 245 closer to the adjacent tooth and be mindful of its position at all times. You'll get there! Use the secondary cutting edge of a sharp enamel hatchet when finishing the axial wall to control the axial depth.

[@이상민-m1n]

I m big from korea thx s2s2

[@remandhakal]

thak you for this beautiful video!!1

[@daniaawni5180]

Any tips on how to avoid trauma to the gingiva using the hatchet? Mine keeps slipping and I'm practicing on a model but it would hurt if it was a real patient

[@StevensonDentalSolutions]

Keep a stable finger rest and make sure that the hatchet is very sharp. We recommend sharpening them after each prep. Also, take very small "bites" with the hatchet...less force and easier to control. And finally, remember that we define with the bur (95% of the prep) and refine with the hand instruments (only 5% of the prep). Best to you and Happy New Year, Dr. S

[@daniaawni5180]

Thank you so much!!

[@unnys2925]

Thanks doc this is a super helpful video! I’m just starting preps in school but we were never fully taught what exactly is a box, and what “dropping the box” means, would you be able to explain?

[@StevensonDentalSolutions]

Yes, dropping the box means to remove the proximal tooth structure from the occlusal aspect, moving gingivally, hence "dropping" the box. Actually a better way of saying this would be to create the proximal box...

[@pingmacalos500]

Doc what will be the chair position of the operator when doing a class II PREP of mandibular first molar

[@StevensonDentalSolutions]

Both 7 and 11-12. 7 is great for aligning the bur and starting the occlusal. 11-12 is good for visualizing the box and occlusal. 9 may be used with direct vision at any time...check out: kzbin.info/www/bejne/fam6oqOmoLmid8k

[@pingmacalos500]

@@StevensonDentalSolutionsalright thank you v3ry much Doc!

[@loretoandreareyesochoa7647]

Estupendas preparaciones dentales saludos desde Chile

[@StevensonDentalSolutions]

Gracias!

[@jancymathew256]

That drawing of S curve is brilliant

[@sedationable]

Hello Dr Stevenson.Thanks for this great video. Please can you post video for Class 4 composite restoration as well???

[@mohammadkhandarman345]

Outstanding so informative

[@StevensonDentalSolutions]

Thank you Doctor.

[@marcelrenehallare8619]

Thank you for using the term "S curve."

[@StevensonDentalSolutions]

Absolutely. Thank you for watching.

[@marcelrenehallare8619]

@@StevensonDentalSolutions I was always reminded that I woundn't be understood if I used the term "s curve" which is a unique term in my school. It seems other clinicians also use that unique term.

[@diehard84]

Thanks for the great video Dr. Stevenson. Any recommendations on how to refine the box if we have no chisel in our instrument set?

[@StevensonDentalSolutions]

Use the 169L or 55/56 to create most of the refinement - you'll need the chisel to refine the Axiobuccal and axiolingual line angles and the point angles at the gingival...

[@franciscoromeronieto7996]

@@StevensonDentalSolutions 0 000 0 0

[@franciscoromeronieto7996]

@@StevensonDentalSolutions 0

[@haroonrasul7134]

Thank uuu.

[@roslali2647]

عندي امتحان بي باجر شكرا دكتور 😢

[@مريممحمدظافرخيري]

Thank you doc very good

[@chopperking1122]

i think one can learn a bit more from this , than watching some of those ones that go for a few minutes with music playing

[@StevensonDentalSolutions]

Thank you, and consider the source of the video too for accuracy and adherence to operative technique...

[@JR-tp9es]

I love your videos. I have a question. What would you do if you need prep Amalgam on the same tooth but it’s DO instead? I have a Columbia typodon as well but the distal cusp is really small. I think if I do mine S shape. I will take most of the distal buccal cusp away. How would you do this type of prep? Is there any restrictions for this type of prep where you don’t follow the rules...!? Thank you so much in advance for your help

[@StevensonDentalSolutions]

Forget the DB groove at first - simply prepare the class 2. Then assess the DB groove - if it is more than 0.5 mm away from the buccal proximal wall, leave it, and you're done. If, however, the groove is closer than 0.5 mm from your buccal proximal wall you have two choices: 1. Simply widen your box buccal to include it, or 2. Cap what remains of the Distal cusp FLAT to the pulpal but don't touch the proximal box from the gingival to the pulpal - it's like a mini-cusp capping procedure.

[@JR-tp9es]

Stevenson Dental Solutions. Thank you so much for responding so fast. I really appreciate it. I ordered some of the burs that you were suggesting and an instrument as well. If at one point you make a video of this type of prep. I’ll be paying attention to it. Thx a lot for all your help

[@rashiedalaqori4287]

Thank you for this brilliant video I have bench test I am looking for bench test course before November 8th 2020

[@StevensonDentalSolutions]

Nice to receive your support - wishing you the best!

[@rashiedalaqori4287]

Do you make bench test course preparation please let me know I need the course before November 8th [e-mail]

[@danieliskander9680]

thanks .. very helpful. I might have missed a thing or two on retention. You didnt stress much on importance of making retentions on the preparations. How useful ( or not ) would you say they are?

[@StevensonDentalSolutions]

As long as the major retention aspects are present: occlusal convergence, proximal convergence and occlusal locks, most amalgam restorations have ample retention. If the size of the box is large, additional retention may help via the use of axioproximal grooves.

[@jasonmohney8295]

Hi Doc, your content is saving my life in dental school. Thank you for putting out amazing content. A quick question. I recently started practicing for Class II Amalgam #30 MO and I've been having trouble gaining a proper vision on the mesial and gingival floor when I'm dropping the proximal box. I'm used to operating at 7 or 8'o cock position when I work on #30, but I was just curious what would be an ideal chair position when dropping the box for class II #30 MO. Same question with a #19 MO as well. Thank you.

[@StevensonDentalSolutions]

Class II boxes on mandibular teeth are always more challenging than maxillary teeth. 7-8 O'clock is good for bur orientation, line of draw, mesial distal tipping, buccal lingual tipping but poor for visualizing the boxes. Try the 12 O'clock position for direct vision - it works most of the time, and have the patient lean towards you. Ultimately, the mandibular class II box approach will be a combination of different chair positions and the concept (albeit uncomfortable at first) of "cut a little, look a little", repeated numerous times. As you gain a subconscious awareness of your bur in 3D space through much practice (will take 100s of preps), and remembering the importance of bur orientation and finger rest, you can do less looking and more "blind" cutting. Some things in dentistry are very easy and some things are very hard - it's just the way it is...so, when you encounter a difficult prep, say to yourself, "okay, this is tough, it will take longer, be patient..." Best to you!

[@jasonmohney8295]

@@StevensonDentalSolutions Hello Doc, thank you so much for your thoroughly reply. Thanks to your advice, I've been trying different operating positions for dropping the proximal box on #30. A quick follow up question though. When I'm dropping the proximal box at a 12'o clock position, I noticed that I've been having lots of trouble with seeing the depth of cut I'm backing since it's a bird-eye view. In another words, it's hard to see how deep I'm going in with a bur. I'm not sure if I'm doing something wrong here, or if it just takes practice. I would appreciate your words of wisdom once again! Thank you.

[@karamabbas2922]

thanks! can u shape the appromximal box without the 10714 instrument?

[@StevensonDentalSolutions]

Yes, for sure - just requires attention to the bur position to avoid damaging the adjacent tooth. THe result will not have sharp internal line angles, but this probably won't be an issue unless it's an exam situation.

[@stevenlopez1717]

This is beautiful

[@drsuk6544]

Thnx for lovely vedios...plz make one Vedio on details of instruments Nd uses 🙏🤓

[@StevensonDentalSolutions]

I will! Thank you

[@ramazoubi867]

Thank you 😍👍🏻👍🏻👍🏻👍🏻

[@StevensonDentalSolutions]

Thanks!

[@monaabdelmotelb8005]

Is it mandatory to go through the secondary grooves? Can we just make it straight line?

[@StevensonDentalSolutions]

These are not secondary grooves. They are primary grooves, as they separate cusps from each other, and yes, they would need to be inclided.

[@monaabdelmotelb8005]

@@StevensonDentalSolutions yes, primary grooves. Sorry

[@ScoopSav]

Would a pear shaped bur be better, for doing the box?

[@ScoopSav]

a diamond one?

[@StevensonDentalSolutions]

As long as it is long enough and flat ended...this bur doesn't exist at this time.

[@ScoopSav]

oh so preferably, a diamond pear shaped bur which is around 3.5mm would be better, it is what we use at university in UK but i’m considering experimenting with some of your burs

[@ScoopSav]

I am trying to find a #19 DO class II amalgam cavity prep which would be really helpful as it is a clinical competency at university, I wouldn’t mind paying for a tutorial or something, just some help would be greatly appreciated for a LL6!

[@hamidazizi6600]

Thank you Dr. S, Very helpful video , whats the difference if the prep is for composite class ll?

[@StevensonDentalSolutions]

The walls of the box may be flared, the internal line angles are more rounded, and no retention in the box are convergent occlusal are required.

[@hamidazizi6600]

Stevenson Dental Solutions Thanks 😊

[@abdulacademy9340]

love it !!

[@angelicafoster670]

Do we have to make S curve or is it optional ? at 15:39

[@StevensonDentalSolutions]

It is placed when it needs to be placed - basically if the box is wider than the isthmus, yes it is required.

[@mahmoodyasin8708]

any tips for better dextirity ?

[@StevensonDentalSolutions]

finger rest. new burs. small but deliberate movements. and the most important recommendations: practice. Hang in there!

[@Boritaliana7]

Great videos! Do you happen to have any class II composite prep videos for molars? Specifically a mandíbular first molar? Thank you

[@StevensonDentalSolutions]

I have a maxillary Molar. Take a look at my video library on my channel.

[@olaimad1640]

Can you please make a video how to do Mo class 2 composite without using hand instruments!

[@StevensonDentalSolutions]

Sure - I did one yesterday in my course.

[@olaimad1640]

Can you please post it in KZbin?

[@olaimad1640]

Please my exam is next week! I need you help

[@ramidarwish7214]

Thank you very much Dr.Stevenson . Can you share us please a video for underfilling MOD Amalgam with Harvard? .

[@StevensonDentalSolutions]

Not sure what you mean by under-filling and Harvard? Do you mean liner/base?

[@ramidarwish7214]

@@StevensonDentalSolutions yes exactly , Harvard it is a Zinc phosphate cement.

[@StevensonDentalSolutions]

We aren't using ZP cement much in the US anymore - there are better options, (GI, RMGI) - I have liner and base videos posted.

[@ramidarwish7214]

@@StevensonDentalSolutions here also in Germany for patients but i muss do it for the exams. MOD amalgam with ZP cement. But thanks anyway 👍

[@StevensonDentalSolutions]

@@ramidarwish7214 Okay - I understand. Wishing you the best.

[@amirapal]

Great this is helpful!

[@StevensonDentalSolutions]

So glad!

[@ベジタリアン凸医療阿片合法]

can the cheap typodont sold at ebay for about 8dollar be used for amalgam filling practice?columbia type is expensive.

[@StevensonDentalSolutions]

Yes, but not for the exams in the US

[@ベジタリアン凸医療阿片合法]

thank you for your reply.that doesn't matter.cause I'm not dental student .I just like to make amalgam tooth model for an object.I also have mercury ball pendant called rasamani made by herbal process.It was metal but smelled like leak.interesting.

[@afrozekhan2269]

Hi Dr. So the buccal wall of the proximal wall should converge toward the occlusal right? i am confused about the lingual wall.Should it not converge at all towards the occlusal? Should it be completely straight parallel to the external lingual surface of the tooth? Because whenever i start preparing the priximal box, both lingual and proximal walls converge no matter how hard I try to not converge the lingual wall. My other question: For the proximal box of all molars and premolars is the same pattern to be followed : buccal wall convergent and lingual wall straight?

[@StevensonDentalSolutions]

The lingual wall (or the non-functional cusp wall) is orthogonal to the gingival. This will require a slight tip of a 245 but towards the lingual to compensate for the convergent pear shape.

[@tymarls]

Hey Dr. Stevenson, I'm sure you want us to buy the 330RGS bur (maybe once I'm not a broke student anymore) but what bur would you recommend to use to refine everything without it? I've tried 330 in slow speed and it rounds the gingival too much but can work. 245 same thing. A 55/56 also works but sometimes is too aggressive. 169 is too pointy (too tapered) and ends up messing up my pulpal floor. I've used a 34 and that sometimes works but sometimes is too convergent and messes up my internal walls. Basically I can understand why you made the 330RGS, but not sure if you have another technique?

[@StevensonDentalSolutions]

Take the 245 and flatten the bottom with a diamond bur. Presto - RGS 330 hack.

[@tymarls]

@@StevensonDentalSolutions thanks!

[@ZeuS07569]

When I'm using airotar with water splash I'm not getting this accuracy What to do doc?

[@StevensonDentalSolutions]

Switch to slow speed to refine with no water, only air.

[@ZeuS07569]

@@StevensonDentalSolutions thanks doc

[@dt.furkanuz]

Thank you for this amazing video. Can you please show us HOW TO POLISH AND FINISH A BEUTIFUL COMPOSITE RESTORATION with a video full of tips. And i really want to see the COMPOSITE VENEER RESTORATION video from you.

[@StevensonDentalSolutions]

Will do - great idea, thank you.

[@zoraidagaviria6153]

Where can I find the instruments the make the measures?

[@StevensonDentalSolutions]

stevensondentalsolutions.com or on eBay search for RGS instruments

[@sahilbhalla389]

Hi doc, i am facing a bit difficulty while preparing buccal extension for Class 1 cavity in mandibular first molars as the walls of extension slant mesially making the mesial wall divergent and i always feel unsure if i have gained parallelism of walls or not . Kindly provide your valuable advise to rectify this problem.

[@StevensonDentalSolutions]

HI, I'd use a 330 bur and keep it perpendicular to the occlusal table (plane formed by the of the cusp tips) except when approaching the marginal ridges, for which you'll need to diverge the bur about 6 degrees to create a slightly divergent wall. The walls are not made parallel in the ideal preparation.

[@sahilbhalla389]

@@StevensonDentalSolutions Thankyou so much, you are always there to help 🙏

[@sahilbhalla389]

Could you also suggest me a way to confirm the convergence of the walls after preparing a cavity in mandibular molars because the mid buccal wall of first molar in 4th quadrant is always a surprise , mostly it turns out to be diverging for some reason.

[@StevensonDentalSolutions]

@@sahilbhalla389 The buccal and lingual primary groove areas should typically be extended about 1.0 mm wider than the isthmus. When performing this extension the bur should be uprighted slightly to lessen the divergence in order to follow the enamel wall direction. IF you extend more than 1 mm, the wall will even need to be made divergent in these buccal and lingual groove areas. If your prep is very conservative, the 330 bur will do the job for you. A solid finger rest is essential.

[@sahilbhalla389]

@@StevensonDentalSolutions Thankyou doc ❤

[@Pushyhog]

recommend dental doc in nc??? They are hard to find, none can touch you. They dont care. im left w/crowns (upper only) and few implants (l have 4). My lower is good.

[@StevensonDentalSolutions]

Dr. Joel Wagoner - the best of the best.

[@ali_jeu]

Hi doctor I have a problem during doing class ii When i placed retainer an wedge Bleeding will complex my work I wish give me advice about how i will placed it and avoid bleeding