Sorry couldn't reply to you immediately due to time difference. I am talking in general, not mentioning a certain implant system since many have different platforms and connections. I was unable to provide a proper study, but I've experienced something with Megagen dental implants (reputable Korean brand). They have Temp abutments and Permanent abutments. One of the features in Permanent Ti abutments is "Cold welding", it works according to the following:
1- Place the hex/ non-hex (engaging/non-engaging) abutment on implant
2- Screw the abutment over implant
3- Unscrew the abutment over implant and remove the screw
4- Try removing the abutment with your hands by pulling, it won't move or come out because of the cold welding feature.
5- It will get removed once your place a threaded Megagen screw driver and pull the abutment out.
This feature isn't there in Megagen's Ti Temp abutments and I've tried them my self on a dummy implant.
Connection might not be the same in performance, though the same screw, implant and analogs are used.
Here is more details on whats called Fuse abutment, It will help you understand the concept I am talking about.
http://www.megagenids.com/sw/swchan...957/28023/04FuseAbutment-singlepageformat.pdf And regarding cold welding, I haven't been able to find something online. but I can make a video for you guys.
Sorry if I didn't explain myself very well but let me rephrase what I said.
1- Ti Temp abutments might have different way to connect, and implants like Megagen and 3I (and maybe many other systems) designed their Temp abutments slightly different than permanent
2- Temp abutments have extra retention platform to allow composite or acrylic engage to it for more stability, and on Cad/Cam sometimes the software will detect the following as undercut and we might end up have a poor or loose Zr abutment over our Temp Ti
3- Let's avoid the word break and use "snap off". due to connection differences in some systems, if the screw ever went loose, this will allow the temp restoration to snap off, so it doesn't effect the implant stability.
4- Ti Temp and called Temporary for a reason. We might not acquire precise study on each system but let's use them for what they are supposed to.