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Trial Midterm Exam . HMD 101 I - Choose The Correct answer : 1-The surface of the tooth opposite to the cheek is called: A-Labial surface B-Buccal surface C-Lingual surface D-Mesial surface 2-The number of the deciduous teeth is: A-24 teeth B-32 teeth C- 20 teeth D-16 teeth 3- Periodontium is composed of: A- Two structures B- Four structures C- Three structures D-One structure 4-One of the mature forms of the lobe is: A-Tubercle B-Oblique ridge C -cusp D – Cervical ridge 5-The ridge found on the tooth margin on the occlusal surface is: A- Oblique ridge B- Marginal ridge C- Lingual ridge D- Cervical ridge 6- The cingulum in the lingual surface is not centralized and is deviated distally in: A- Upper central incisor B- upper lateral incisor C- Lower central incisor D-Lower lateral incisor 7- Cementum covers : A-Crown B-Root C-none of the above . D-All of the above . 8- The geometric outline of the Lower incisors is : A-triangular . B-Hexagonal . C-Diamond . D-Pentagonal . 9- Which of the following teeth has 2 lingual fossae : A-upper central incisor . B-upper canine . C-lower central incisor . D-lower premolars . 10- The ridges of upper canine : A-cervical ridge . b-Buccal ridge . C-Labial ridges . D- (A+C ) E- (A+B ) ( 5 Marks ) II – Complete The following : 1-The oblique ridge is found in……. 2-The function of the incisors is…… 3-The number of point angles of anterior teeth are…….. 4-The incisors have …….mammelones 5- ( #19 d ) is termed ……………………. In two Digid system . ( 5 Marks ) III – Give an account on : A) Points angles of anterior teeth . Labial surface of Mandibular central incisor . ( 5 Mark