Case Study || "Tangle-Teezer-Like" Tool and Breakage?

I was on one of my favorite forums when I came across the following case study that was performed in India.  The report involves a tool that resembles the "Tangle Teezer" in terms of bristle arrangement and sizing.  (There are, of course, some differences between the tool in the report and the "Tangle Teezer", but the similarities cannot be neglected, in my honest opinion.)

So what is so interesting about this case study?  Well, to me, it does more than demonstrate how the use of certain hair tools may ultimately translate to breakage.  It does two more things:

1) It gives possible confirmation to those who jumped on the "Tangle Teezer" bandwagon and noticed an increase in breakage and split ends thereafter.

2) And, for my own hair care practices, it makes me think twice about using the "Tangle Teezer" on my flat-ironed hair.  (You see, I figured the problem with the tool that most people were experiencing was due to using it on textured hair.  I thought it okay to use the tool on straight hair ... until now.)  Contrary to what I initially guessed, the study was performed on patients who were not afro-textured but who had naturally straight/wavy hair.  Even on straight hair, this tool may present a problem!?!

Ultimately, patients were asked to: 

• avoid the tool (and instead use a straight comb with elongated bristles) AND 
• to change their combing habits (which involved using the tool on hair that had not been lubricated with conditioner or oil).

For the full study: TRICHORRHEXIS NODOSA INDUCED BY TOOL AND COMBING HABIT (2011)

About trichorrhexis nodosa -  "The essential abnormality of trichorrhexis nodosa is the formation of nodes along the hair shaft through which breakage readily occurs (Source)."