There has always been a critical missing piece in dental education. We have not upgraded some of our techniques since ages according to modern engineering principles.
It is important to understand that the level of engineering in the era of G V Black was nothing like today. The Black’s Class II is nothing but a Mortis and Tenon interface, commonly used in cabinetry making.
There are four basic points which have undergone drastic changes since the era of G V Black.

Dentistry and Modern Engineering
It is important to understand that the multiple cusped teeth are naturally put into tension. To add to this, the traditional teeth preparations further complicate the already tenuous engineering problem.
The human tooth is a naturally brittle complex. When a traditional Class I or Class II preparation is loaded thousands of times, the resultant cyclic fatigue further weakens the already brittle tooth structure. It is important to understand here that adhesive bonding alone cannot lessen the gravity of this ongoing weakening process.
Thus, it can be concluded that our traditional cavity preparations and even our classic endodontic access are not up to the mark according to modern engineering perspectives.
The Effect of Fluoride and Abundant Fermentable Carbohydrates
There has been a change in diet pattern in modern times as compared to Black’s era. The diet prevalent in today’s era is more of a carbohydrate laden type of diet.
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