NBDE I Examination Questions with Complete Answers

Nonmaleficence Do no harm Autonomy patient to make his or her own decisions regarding the treatment that they will receive Beneficence promoting or doing good Veracity being truthful and respecting the position of trust that is essential in the dental professional/patient relationship Justice providing individuals or groups with what is owed, due or deserved. Primary tooth eruption chart Which primary tooth is most likely to have an oblique ridge? Maxillary second molar Gothic arch tracing C = apex and centric relation Picket fence Mandibular second premolar Mandibular second premolar Permanent tooth eruption chart Permanent tooth eruption chart Cusp of carabelli only found in maxillary molars If a maxillary first molar has 4 root canals.. Mesiobuccal has 2 Maxillary permanent first molar structures - buccal side - M to D... MB line angle, MB cusp ridge, buccal groove, DB cusp ridge, and DB line angle. Mandibular permanent first molar Accessory teeth are most commonly found Between the maxillary central incisors (mesiodens) Behind the third molars (distodens) Near the mandibular second premolars (peridens) Partial anodontia (missing teeth) most commonly observed with third molars, followed by the maxillary lateral incisors and the mandibular second premolars. Primary eruption sequence 7 + 4 rule Height of contour located on the cervical third of the crown of all teeth, except the lingual surface of posterior teeth, where it is in the middle third lingual height of contour for mandibular second premolar is cervical third Permanent Max vs Mand canine The permanent mandibular canine is much narrower faciolingually than the permanent maxillary canine mandibular canine is more likely to have 2 roots Enamel Abnormalities Focal hypomaturation: Similar to hypocalcification except that only one area is affected (focused). Amelogenesis imperfecta: Hereditary condition causing enamel defects. Severity ranges from complete enamel absence to minor defects. Severe attrition is common. Dental fluorosis (mottled enamel): Caused by high fluoride ion intake during tooth development. Clinically has a chalky white shape. Turner's hypoplasia: Caused by local factors including injury to the developing permanent tooth through extraction or infection of the primary tooth. Vocab... Anodontia: All teeth congenitally missing Partial anodontia: One or a few missing teeth Oligiodontia: Six or more congenitally missing teeth, excluding third molars Hyperdontia: One or more additional teeth. Each extra tooth is known as a supernumerary tooth. Mesiodens: Most common supernumerary tooth, found between the central incisors Contact areas Anterior tooth contacts are centered faciolingually when viewed from the incisal. Remember that moving posteriorly from the midline, contacts become more cervically and buccally located. Pulp spacing Working movements are... Working movements (laterotrusive) are on the side the mandible moves towards. A right working movement means the mandible is moving to the right. Non-working movements are.. Nonworking movements (mediotrusive, balancing) are on the side that is moving towards the midline. Permanent calcification chart Teeth shape proximal view Teeth shape occlusal view Teeth shape buccal view Cervical lines.. Convex towards the incisal edge M and D Concave towards the incisal edge F and L Order of commonly missing permanent teeth (most common-least common) Maxillary and mandibular third molars Maxillary lateral incisors Mandibular second premolar What muscle is used during a right working movement? left lateral pterygoid Bennett movement the left and right condylar motions caused by lateral movements of the mandible. Bennett shift the lateral movement of the mandible towards the working side during lateral excursions. Bennett angle the angle obtained after the non-working side condyle has moved anteriorly & medially, relative to the sagittal plane. The flatter the cusp, the greater the side shift. Embrasures.. The largest incisal embrasure is between the maxillary lateral and canine. The largest occlusal embrasure is between the maxillary canine and first premolar. The largest overall incisal/occlusal embrasure is between the maxillary lateral incisor and the canine Maxillary first premolar typeI