Skip to main content

Elevators on Exodontia

# Most of the elevators used in exodontias work on the principle of:
A. Class I lever
B. Class II lever
C. Class III lever
D. Wheel and axle



The correct answer is A. Class I lever

Most of the elevators used are class I or simple levers. The fulcrum (alveolar bone) is located between the applied force (hand of the operators) and the load or resistance (tooth).
Effort arm (distance between the fulcrum and the force applied) should be greater than resistance arm (distance between the fulcrum and the load or resistance i.e. Tooth).

Comments

Post a Comment

Add Your Comments or Feedback Here

Popular Posts

Dental MCQs - Multiple Choice Questions in Dentistry

SELECT THE TOPIC YOU WANT TO PRACTICE. # LOK SEWA  AAYOG PAST QUESTIONS Medical Entrance Preparation MCQs # Digestive System and Nutrition MCQs # Reproductive System MCQs # MCQs on Sense Organs # Nervous System MCQs # Cardiovascular System MCQs # Endocrine System MCQs # Assorted Dental MCQs - Part 1 #AIIMS MDS ENTRANCE EXAM YEARWISE COLLECTION *** AIIMS Nov 2001 *** AIIMS Nov 2002 *** AIIMS Nov 2003 *** AIIMS Nov 2004 *** AIIMS Nov 2005 *** AIIMS Nov 2006 *** AIIMS Nov 2007 Part 1 *** AIIMS Nov 2007 Part 2 *** AIIMS Nov 2008  *** AIIMS Nov 2009 *** AIIMS Nov 2010 *** AIIMS Nov 2012 *** AIIMS Nov 2013 *** AIIMS Nov 2014 *** AIIMS Nov 2015 *** AIIMS May 2016 *** AIIMS May 2015 *** AIIMS May 2014 *** AIIMS May 2013 *** AIIMS May 2012 *** AIIMS May 2011 # DENTAL MATERIALS *** Amalgams *** Physical Properties *** Metallurgy *** Impression Materials *** Dental Ceramics and Miscellaneous *** Gypsum Products *** Dental Cements *** Restorative Resin...
Continue Reading....>>

MCQs in Orthodontics - Most Important Orthodontic MCQs with Answers

Question 1. According to Wolff’s law: A. Human teeth drift mesially as interproximal wear occurs B. Pressure causes bone resorption C. The optimal level of force for moving teeth is 10 to 200 gm D. Bone trabeculae line up in response to mechanical stress Correct Answer: D Question 2. Overjet is defined as: A. Horizontal overlap B. Vertical overlap C. Transverse plane discrepancy D. All of the above Correct Answer: A
Post a Comment
Continue Reading....>>

MCQs on Odontogenic Infections - Oral and Maxillofacial Surgery

# Trismus associated with infection of lateral pharyngeal space is related to irritation of the: A. Buccinator B. Masseter C. Lateral pterygoid D. Medial pterygoid # Garre's osteomyelitis is: A. Chronic focal sclerosis and non suppurative osteomyelitis B. Chronic focal sclerosis and suppurative osteomyelitis C. Characterized by suppuration and acute pain D. Chronic diffuse sclerosing osteomyelitis
34 comments
Continue Reading....>>

Download All Books In Dentistry Free - Free Dental Books - Download All Dental Books for Free

NOTE: If you cannot find any books here in the list below, You can search yourself in the Library Genesis Website Database.  DISCLAIMER: We do not store any of these books in our database and these links provided may subject to change. We are simply redirecting you to the website that serves free download of these books. We'll not be held responsible for any damages incurred by the publishers and writers. Please contact us (Email to: dentosphere.worldofdentistry@gmail.com) immediately if some links are not working.  Please Click the Link of the book you would like to download , and click GET for downloading the file. First Year # Gray's anatomy for students - Fourth Edition # Textbook of Microbiology and Immunology - second edition # Essentials of Medical Pharmacology - KD Tripathi - 8th Edition # Essentials of Medical Biochemistry, Second Edition: With Clinical Cases # Guyton and Hall Textbook of Medical Physiology -14th edition 2020 # Textbook of patholog...
Continue Reading....>>

MCQs on Mandibular Fractures and Middle Third of Face Fractures - Oral and Maxillofacial Surgery

# Which is the immediate danger to a patient with severe facial injuries? A. Bleeding B. Associated fracture spine C. Infection D. Respiratory Obstruction # Craniofacial dysjunction is seen in: A. LeFort III fracture B. Guerrin's fracture C. High LeFort I fracture D. None of the above # The 'hanging drop appearance' in the maxillary sinus radiograph indicates: A. a nasal polyp B. a blowout fracture of the orbit C. a radiograph artefact D. an antrolith # Suturing in facial wound injuries should be done within: A. 2 hours B. 4 hours C. 6 hours D. 8 hours # Diplopia is most common with: A. Mandibular fracture B. Craniofacial dysjunction C. Nasal fractures D. Zygomaticomaxillary complex fracture # Paresthesia is seen with which of the following types of fractures? A. Subcondylar B. Zygomatico maxillary C. Coronoid process D. Symphyseal # Forceps used for maxillary fracture disimpaction: A. Rowe's B....
19 comments
Continue Reading....>>