This patient presented with a broken implant crown. It was done 20 years ago in Los Angeles, California. What made this case interesting is that the dentist had retired and there was no record of the type or size of the implant. I sent pictures to different implant companies, but none were familiar with the design. I eventually figured out the implant manufacturer, but after checking, discovered they were no longer in business.  Another complication was that the screw was stripped and difficult to remove. Eventually after trying different sized external hexed implant fixtures, I was able to get one to fit and made a beautiful new implant crown. Here’s the clinical photos: