Lack of full contact between filled and adjacent teeth
It would be fair to say that unfortunately not all dentists observe the filling technique. This, in turn, often leads to more serious consequences than just a bad filling. Fractures of teeth are often the result of nonobservance of filling technique. Sometimes one can even lose tooth because of that.
The most widespread dentists mistake is lack of full contact between filled and adjacent teeth. This lack of contact created a space between teeth filled with various pathogenic bacteria. These bacteria are known to cause many diseases like caries and toothache.