Nankali's Masticatory Force Systematization force of the masticatory system and discovered the differences in the produced force, which was approximately doubled. The periodontal system controls automatically the measure of mastication force in this process and the jaw elevator muscles develop the main forces used in mastication. Dr. Weber worked out that 1 cm cross section surface area of any masticatory muscle can produce approximately 10 kg force. The following average surfaces were found: temporalis - 8 cm, masseter - 7.5 cm, and medial pterygoid - 4 cm which makes a total of 19.5cm. However, this force in some people is measured up to 3900N
What Hurts the Most 100 as well as their lowest-charting lead single. Aside from charting on the Hot 100, the song managed to peak at the top of "Billboard" Hot Dance Club Songs and at number twenty-eight on the US "Billboard" Pop Songs. Despite its low peak on the Hot 100, the song managed to sell more than 500,000 downloads, earning a Gold certification by the Recording Industry Association of America in October 2009. In Canada, the song managed to peak at number fifty-four and lasted on the chart for eleven weeks. The music video for "What Hurts the Most" was filmed in Los