^^ I'm a dental student with my technical practice exam tomorrow morning. We're doing maxillary anterior prep and provisional so this is a great refresher!
This is such an inspirational, disciplined, and didactic video that any of dental student should watch. I greatly enjoy your videos and learn a lot ! Thanks for your amazing videos all the time !
You teach with so much precision , Sir ! Just your this one channel is enough for any newbie dental doctors out there to master dentistry ! Expecting to see much more from you , doc ,! Btw ., do you have a video on veneer cementation ???
thanks Dr.Stevenson for sharing such amazing information which definitely going to help out so many dentists around the globe. you are true teacher by heart.
May the road rise up to meet you; may the wind always be at your back and may god hold you in the palm of his hand. Thank you for being so kind, Dr. Stevenson!
Amazing job , beautiful , Dr . Stevenson please make more videos of ceramic preparations in different teeth and also ceramic bridges You’re videos are the best !!!
can you please make same videos of crown on patients because there are lots factors we need to take care of. your experience and skill will guide us to make great work ......
I have an e max prep to do on an upper Central incisor next week. Thanks for your invaluable tips. You clearly have great hand skills. Best regards from the UK.
Very demonstrative video taking us into essential details . Thanks sir for uploading the same. Lots to learn from it . Shows you're a stickler for perfection. Great teacher for students. Please keep going with your good work .
Thank you for sharing your knowledge through the videos dr stevenson.your method of teaching is flawless.it will be greatful if you do a video on shade selection.thank you and good day dr😊
Thank You Dr. Stevenson for sharing this preparation. This is a very helpful video. Could you please make and share a video for All Ceramic Crown on Posterior tooth (maxillary molar). Thanks.
Thanks for the demonstration, I just took the seminar by Dr.Strupp, simplifying complex cosmetic dentistry, and he said that shoulder preps are the worst margin design and should be avoided at all cost. He advocates thin chamfer margin for all-ceramic restorations. This is directly from the manual we received "The only time a shoulder margin preparation is acceptable is when it pre-exists and cannot be surgically shaped by a periodontist. A shoulder margin should be considered a severe compromise in preparation design, ultimate health and esthetics. The only exception is when the prepared tooth [substrate] color is severely compromised". I was taught in school to do shoulder for all ceramic and zirconia, I was wondering what are your thoughts? He lists these reasons " 1. Refractive index between tooth and restorative material 2. Difficulty of preparation 3. Weakens the tooth a. Mutilates healthy tooth structure b. Precipitates tooth fracture 4. Increases endodontic necessity 5. Fit - Porcelain shrinkage 6. Increases lab time Thanks!
@@StevensonDentalSolutions Thank you this technique has worked very well, something everyone should try. Last quick question, what is the best way to get rid of J margins / J lips if we get them during the crown prepping process? Thanks!
Hi Dr Stevenson Thank you for teaching us through your videos. Could you please tell what will be modifications for - all ceramic crown with an internal coping?
Very nice and didactic video Dr. Stevenson; I am wondering how long do you take, in reality, from getting patient numb to the cementation of the temporary crown? Thank you for your time and response.
About an hour. I add another 15-20 minutes for each additional tooth - 6 teeth would be scheduled 2.5 hours. 14 teeth (the max I’ll do on a patient in one sitting would be scheduled for 6 hours.
Good morning , The preparation is perfect but I usually prefer vertical preparation which saves more healthy dentin . Do you also use vertical technic ?
It's a very questionable technique and NOT supported by much science - only a few poorly done papers and a lot of hype and opinion. I own a dental lab and when we receive one of these preps, we need to spend more time making them work. Taiseer Sulaiman, arguable the world's number one resource for zirconia considers these preps to be significantly problematic from a durability perspective. I'd prefer to follow the evidence with RCTs and Systematic reviews.
Thanks doctor!!! I have some question below. 1. What will happen if there’s no rounded internal line angle in the all ceramic preparation? I was taught by my teacher that the all ceramic line angle should be 90 degree(resembles with the buccal side of the PFM), which is prepared with a shoulder bur. Is this an old-school concept? 2. What’s the difference between the preparation design criteria of all ceramic, all zirconia, and zirconia veneered with ceramic? 3. Where do you usually place the finishing line? Anterior, posterior teeth, and the teeth with gingival recession?
1. Very old school perspective and very risky. Ceramic will be stronger, less tooth structure will be removed, and the milling procedure or pressing procedure will be facilitated without having a sharp line angle. The recommended finish line today is either a fillet or a rounded internal shoulder. 2. For layered zirconia you’re going to need to reduce more on the facial to allow for porcelain veneering so you should be at least 1 mm deep axially. For lithium disilicate The reduction could be significantly less as little as .5 mm. For Zircoconia monolithic the depth should be between .6 and .8 mm
@@StevensonDentalSolutions so today the shoulder finish line is only recommended on the buccal side of the PFM, right? I also saw some doctor choose fillet finishing line in a PFM prep, is that ok?
Hi Doctor - I could (as it it quite easy to do) but I don't advocate this design do to the material demands of the design exceed the strength characteristics of ceramics, no matter how strong. Most technicians find these preps to be very difficult to restore, as well, usually over-contouring them leading to tissue issues. It's not innovative, after all, as dentists have been making feather edge preps for decades. I could be wrong, but I believe this design will be short lived.
@@StevensonDentalSolutions I am currently taking my DDS degree in China, which they call BDS here (Bachelor of dental surgery) would love to impliment some of your products over here
1.0 mm for zirconia 3Y-TZP on the lingual would be the minimum. Optimally, 1.5 mm, which would work for glass ceramics as well. The prep will need to have a well made fossa and the resulting faciolingual dimension will be thin.
