Thank you so much Dr. for the videos. I find them very informative and helpful for students and dentists! Thanks again for your time and sharing your knowledge and wonderful skills.

You are an amazing teacher! Thank you for your help!!

Thank you very much for sharing with us your vast knowledge, Dr. Stevenson! All your videos are as good as gold! You excel at everything you do. Thanks again!

Hello dr, can you please please please post a video of upper canine PFM preparation ??? Would be highly appreciated ..thanks again

thankyou Dr. Richad Stevenson

Thank you very much Dr for this video

The best doc,and the best preparation Thank you very much ,and waiting another videos❤

impressive. your teaching skills are incredible

Really nicely done.

I apreciate your work and creativity ... you are my proffesor who I have never met but the most I have learnt from him .. God bless you

my best choice for all preparations 👏👏👏👍👍😊

whether it’s a pfm pep or not, it’s still incredibly informative regarding preparations in general. Thank you!

What a fantastic preparation ❤️

Great presentation Dr Stevenson. I graduated from dental school in 1980 . The clinical requirements were extensive for both operative dentistry and crown and bridge. I personally think both departments should have been lumped together into one department called fixed restorative. As students we were required to successfully complete 40 "units" of crowns and bridges. Almost all the associated lab processes were required to be completed by the student. The school had its own lab and we were allowed to to use the lab to fabricate 6 units of PFM restorations, The remaining 34 units were waxed up and cast by the students and porcelain stacked and oven fired if the crown or bridge was a PFM.. In the operative dentistry section we were required to wax up, cast, and cement 140 surfaces of indirect gold inlays and onlays.restorations. Additionally there were additional requirements for cast gold restorations with wax patterns obtained and sprued using Kerr pattern wax when "group function was the objective and the centric and excursive contacts were obtained using Kerr pattern wax directly from the tooth being treated, Rarely a shortage of patients needing treatment and always a shortage of time to get things done. I often used a hybrid technique where I would transfer the wax pattern to a stone cast made from an impression to refine the proximal contacts and counters, I left dental school a strong advocate of a shoulder.bevel prep design. Interesting I have not prepared a tooth with a margin design like this in more than 15 years for many reasons,, The cervical portion of a tooth is where the pulp is closest to the surface, Preparing a shoulder in this cervical zone has no benefit when using gold or monolithic Zirconia, Rounded junctures between axial and gingival portions of a tooth preparation seem to be our best option. Minimal taper of the prepared tooth s very important I use either a 1.2, a 1.4, or a 1.6 round end cylinder fine grit diamond to finish the margins for crown preparations being very careful not to engage the crest/mid point of the round end that would create "J" shaped margin.Many labs set the milling tolerance with way too much allowance fo cement space and the crowns they fabricate fit like socks on a rooster, One think that baffled me as a dental student was how little attention was given to cleaning the tooth prior to cementation and keeping to both well isolated, Over the past 42 years manufacturers of cements seem to focus on attracting dentists that are looking for an easier way

Thank you doctor, I received your message. I already did the order through Ebay, but, I am going to contact your web page. Thanks again

Thanks doctor very useful video

thank you so Much sir,very informative

amazing Preparation .thnx from Germany!

Great video dr.stevenson.. thank u..

outstanding demonstration.

Dear Dr. Stevenson; Can you please make a video on PFM on lower premolars? Mine becomes really small...Don’t see where the problem is... I would very much appreciate it.

Great video Dr. Stevenson! This is the first time I've heard someone describe a technique where the transverse ridge is maintained in their preparation. It makes perfect sense as more tooth structure is maintained, resulting in a biological prep with greater resistance form. I was wondering, with regards to interproximal clearance is there a shorter but that you might use? I usually find that most my patients struggle to open wide enough for the needle but to be held upright. I also find I end up with the prep looking overtapered on the dist, especially when the contact point is quite far gingival. What do you look for in when preparing these area? Maybe a video on your positioning for tooth preparation would be useful to others as well? Thanks again for your wonderful content and time out into these videos!

Excellent, Very perfect preparation Thank you so much

the best ever . thank you Dr.

Nice video and explaination of tooth preparation!

Mükkemel bir kesim🧿👏💐

Brilliant ❤

Dear Dr. Stevenson, Thank you so much for always replying to my doubts..Today, I'm writing to share with you that I got acceptance from an advanced standing program and I owe my success to you. Even though I wasn't your direct apprentice, you still took time to guide me here. I'd like to share a small story from the epic Mahabharata in India where a student named Eklavya is denied formal education by his Guru but through his determination and just by observing his Guru perform tasks for otherstudents, Eklavya gets better and better until he becomes the best student the guru had ever seen. I'm far from being the best but in context of learning from a distance, I'm the Eklavya to you and have learned so much from you and you are my Guru. 🙏 I look forward to learning from you, in-person as I progress in my career. Thank you so much. Best regards, Adi

Thank u sir for making such videos U have excellent teaching skills Videos r incredible Pls make videos of crown preparation for pfm for lower incisors

great resource

Thank you so much for sharing your teachings. Would like to ask, in clinical settings, how long will it take you to prep a tooth?

great job

Can you please make a video for lower molar PFM as well 🙏. Very helpful videos

hello dr. thank you very much for the video and the time you[re giving un answering our questions. I'm a dentist but I'm preparing to get my approbation in another country and I found it always difficult to do the preparation on this tooth. I mean it's really ok if it's with a good view like this but it's so difficult to do it when it's the real (upper jaw) and my real Problem is the transition from distal to palatinal surface. Do you have any advice. I appreciate you answer.

Hi Doctor, great video!! Would you prepare the occlusal the same way for a cast metal crown? I know it would be less reduction.

Super work Dr Stevenson!! Do you mind we share? (All credits and links back to you and your channel of course!!)

Impeccable

Great effort Doctor thanks alot I have a question please, how the tooth doesn’t burn even though you aren’t using water ? And can you give me tips on how to work inside phantom head without feeling pain in my neck as the phantom is not flexible that much and what is the best position for working on upper left quadrant

Good work Dr. stevenson! I would really like to see this done on a patient with the proper ergonomics. I always struggle working on the upper molar and end up having to bend my whole head just to look directly at it. Whenever I work with a mirror, the water blurs the view. Any advice? Thank you!

Dear Dr. Stevenson thank you for your time and help and appreciate your great work and support. I have a question, when we say 4mm of the walls would be left after occlusal reduction it’s only about the buccolingual side right? Proximal walls are shorter like 3mm? Is it not too short for molar all ceramic prep?

Hallo Dr. Stevensons Could you please make a video about temporary crown? Wenn I do the Prep. for pfm it always fraktures lingually. I'm sure I don't have undercuts but maybe 0.7 lingually is just not enough? Thank you very much for all the videos. I'm learning so much from your channel. 🌺

Amazing I wish how fortunate i would be if I had a chance To learn ur prosthetic skills. Another doubt is the chamfer and shoulder is equi gingival or supra gingival?

Thank you Dr S. when you used 878K-012 for axial reduction and then 8847 for shoulder, was there any internal undercut created.??Can we use 847 bur directly for both shoulder and axial reduction.?

Замечательно удачи док )

Thank u

Do you employ this technique when working with natural dentition? I have been practicing this technique for my #3 full cast gold and #5 PFM fixed partial denture practical exam.

Hi Dr how do you tackle the difficulty of prepping the distal of teeth especially with the finish line? I find it very challenging and can get all my other surfaces looking nice but my distal is rarely acceptable due to challenging visibility. Any tips? Greetings from Scotland! I’m doing my first crown prep on a patient next week! Scary!

Hello Dr. Do you place the gingival cord when you form a buccal shoulder margin? If not, the gingiva will be damaged and bleeding.

خیلی عالی

Hello Dr.Stevenson, Is there any video of pfm crown prep for mandibular premolars?

Can u please write all the measurment of all aspect please

I like kind of fun awesome .

hello doc, why shoulder finish line is not recommendation for pfm/all metal crown?

Dr.Stevenson, While practicing crown preps, do you recommend filling the bottle connected to the dental turbine with water? I have been using the handpiece without water flow and the diamond burs just burn/wear off after single use. What can be done?

Thanks for these information. I would like if you can do pfm on upper canine.

Hi Dr, For PFM crown prep do we have to reduce occlusally 2mm which should be overall occlusal reduction or do we have to reduce the functional cusps which in upper molars are palatal cusps by 1.5mm where there is only coverage by metal and buccal cusps by 2mm where coverage is both by metal and porcelain?

Dr.Stevenson we won't be given an RGS during the bench exam..so can the bur be used to measure the thickness of the reduction we did?

Hello Dr, When placing bevels at the very end, should the tips of cusps be slightly flattened?

Beautiful prep! How do you check the reduction of the B plane? It's pretty difficult to measure with the burr tip from what I gather from the video as there are very few original occlusal surface landmarks. There's a high risk of over prepping or underprepping. Thanks

Thanks for videos. Very helpful. Can you please post PFM preparation for lower 1st molars also?

Thanks doctor.. Plz tell me the amount of reduction of occlusal aspect of posterior teeth for PMF crown in the functional cusp and non functional cusp

Hi Dr. Stevenson...I hope you are doing great! I have a question...I am really struggling to keep my buccal reduction for premolars and molars under 1.5 mm and to prepare buccal margin to 1.2 mm for PFM...Can you please guide me how to maintain bucco-lingual taper without ruining measurements? Also, If I keep my bur parallel to intact tooth structure to prepare shoulder margin, this would create undercut and make my bucco-lingual convergence wrong...Can you please guide me?

Hi Dr.Stevenson,I am confused regarding the axial wall prep.Do we have to first reduce all the 4 walls with 878k-012 and then later use 8847KR-016 on the buccal wall only or can we reduce first the buccal wall directly with 8847KR-016 and reduce lingual wall separately with 878k-012?

im struggling with tooth preps so much, it's like I can't implement what's in my mind on the tooth using the bur, something's wrong with my technique that I can't quite pinpoint. My preps always end up with shaky over-reduced finish lines and an obvious lack of uniformity/control during reductionn.

Hello Dr. When tip of the bur can fit into the margin created is that the amount of axial reduction that is required?

Hi Dr. Can 877-009 bur be used for lingual reduction and placing the chamfer at the same time?and the amount of lingual reduction be equal to the tip of 877-009 fitting half way?

Hi Dr. just a quick question, can I use a flat end for occlusal reduction?thank you

Hi, doc! I cannot prepare a thick margin with 878k-012 bur. How should I move 878k-012 bur to prepare a thick margin?

Dear Dr Steven , how can we buy the burs? for me it's easy to buy over eBay , is it possible to buy these bur kit on eBay ? please comment , thanks

Dr, how much axial reduction is required bucally,lingually and proximally?

the problem is that we rarely prepare complete tooth like this ..... usually pt ask to crown teeth is highly fractured and filled and sometimes tilted

Hi how much is tge degree of taper of the PFm you did?

As the tool is called 3min?

My dentist growned my teeth down to nothing and at gum and below, iam screwed. No shoulder visable. One day he burned & recessed my gums with with hot iron thing.

I have one more question. Should PFM crown margin be formed with shoulder margin? Should not it be formed with a deep chamfer margin?

🧡🧡🧡🧡🧡

Why not undermine the interproximal enamel like you do on your filling videos? You don't even need to drop a box, you can just move from in a bucco-lingual direction through the contact and leave some enamel that will flake off later anyway.

God

👌🇺🇦

thanks doctor please translate into türkish

This is fine on typodont teeth. In the real world this is a joke. The occlusal reduction isn't the most important thing. A great margin and corresponding impression is. This is timely slow. Most crown preparation have caries that are challenging thus a difficult impression. Lab techs love me because I create a crisp margin with flashing past the margin. That's how you get an excellent fitting crown. This is ok for a dental student but on a real patient with deep subgingival caries this is not helpful. Again you have to capture the margin deep sub gingival in the real world. Get a soft tissue laser and get an excellent impression every time. Anyone can prep a typodont tooth. Try it in the real world with real cavities. That's what dentist struggle with. I see it all the time. Crowns with poor margins because the dentist failed to use a quality lab and get an accurate impression.