I thought I had posted this case when I first did it. However I could not locate it. So, I’ll post the preops.
This was a medically compromised patient. Today I would not have used the cord as seen and would hope my tissue management is better today. However the patient had no post op discomfort.

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This is a pre MD case and was done with the Waterlase. I have to say that I would do the case differently today.
First I used the Waterlase with a G-6 tip with 0.75W 0 water 30a in contact to trough around the root. I then cored and prepped the tooth. I prepped the tooth to give me 2mm of solid tooth. Since I had plenty of attached gingival I removed enough to just expose the margin of the prep. Before starting I had bone sounded the tooth as well as the tooth distal and mesial to the prep. I decided I needed to go 5mm from the new gingival margin. I marked the G-6 at 5mm. I used the Waterlase with the G-6 at 2W 20water and 40air . I worked the tip around the prep until I was at the osseous. Staying out of contact I kept moving the tip around the prep until I got 5mm . At this point I went to .75W 10water and 30air. This time I placed the tip on the bone and moved it quickly feeling the bone as I go till it feels smooth. Next I angled the tip under the tissue blunt dissecting it . Then feeling the bone to make sure I left no ledges. I bumped the watts up to 1-2 W if needed. Lastly I used a scaler to plane the root to make sure no thin layer of bone was left on the root surface. At this point with loops you can see the bone.

Placing the temp was a bit tough. The patient was medically compromised and her gums on a good day bleed easily. I used the diode at 5W continues in noncontact to help with hemostatis . I don’t remember but from the look of the tissue I must have used some FeCL as well.
I did leave the patient in the temp for 3 months before the final impression. The tissue did look pretty ugly the day of the CL but the patient reported no discomfort the next few days and it healed nicely.

Access was key to this case. I could have done the CL prior to the core and got better access. I wanted to know where my margin would be before I started and I was not sure I could isolate the tooth for bonding after the CL.
With the MD or even the Waterlase I would have used a Z tip. As I trashed the G tip on this case. I also would have had more tip length to work with. I also feel I needed to reduce the interprox a bit more. I am a little concerned about the look of the tissue on the mesial buccal. Then again it did not bleed after an aggressive probing.. Time will tell.

Allen thanks for the comment on the crowns. I have a running battle with my lab about crowns. He say ‘s his all ceramic Cerapress looks better then his PFM’s. 20 is a cerapress and 21 is a PFM. It will be fun showing him this post-op photo.

Ron ,Bob thanks as well…