Problem :Laterally from the midline in either jaw, we have eight teeth: two incisors, one canine, two bicuspids (or premolars), and three molars (the last molar being a wisdom tooth). The lateral distances from the mandibular joint to the insertion of the masseter muscles, the first bicuspids, and the central incisors, are 0 .4L, L, and 1.2L, respectively. (a) What type of lever is involved in biting and chewing with the masseter muscles? (b) For biting in equilibrium with a masseter muscle force of 1,625 N, show that the force on the first bicuspid of 650 N, assuming there is no force on the central incisors [67]. Draw a force diagram for this. (c) Under these conditions, show that the needed counter force on the central incisors is 540 N, now assuming no force on the first bicuspid. Draw a force diagram for this. Problem :Laterally from the midline in either jaw, we have eight teeth: two incisors, onecanine, two bicuspids (or premolars), and three molars (the last molar being a wisdomtooth). The lateral distances from the mandibular joint to the insertion of the massetermuscles, the first bicuspids, and the central incisors, are 0 .4L, L, and 1.2L, respectively.(a) What type of lever is involved in biting and chewing with the masseter muscles?(b) For biting in equilibrium with a masseter muscle force of 1,625 N, show that the forceon the first bicuspid of 650 N, assuming there is no force on the central incisors [67].Draw a force diagram for this.(c) Under these conditions, show that the needed counter force on the central incisors is540 N, now assuming no force on the first bicuspid. Draw a force diagram for this.

During the chewing, the lower jaw acts as a second-class lever while biting the lower jaw acts as a…

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Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Problem :Laterally from the midline in either jaw, we have eight teeth: two incisors, one canine, two bicuspids (or premolars), and three molars (the last molar being a wisdom tooth). The lateral distances from the mandibular joint to the insertion of the masseter muscles, the first bicuspids, and the central incisors, are 0 .4L, L, and 1.2L, respectively. (a) What type of lever is involved in biting and chewing with the masseter muscles? (b) For biting in equilibrium with a masseter muscle force of 1,625 N, show that the force on the first bicuspid of 650 N, assuming there is no force on the central incisors [67]. Draw a force diagram for this. (c) Under these conditions, show that the needed counter force on the central incisors is 540 N, now assuming no force on the first bicuspid. Draw a force diagram for this.

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