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Questions and Answers
An overbite is the amount of horizontal overlap between the maxillary and mandibular incisors?
False
Normally, the lower incisal edges contact the lingual surface of the upper incisors at or below the cingulum?
False
Overjet is defined as the vertical overlap of the incisors?
False
An open bite involves no vertical overlap between maxillary and mandibular anterior teeth?
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Dental open bite involves only a few teeth due to a digit-sucking habit or other local factors?
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Skeletal open bite is caused by convergence of the skeletal mandibular and maxillary planes?
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What is the term for the type of malocclusion in which the vertical overlap of the anterior teeth is increased beyond the ideal relationship?
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What is the normal range for the vertical overlap of the anterior teeth?
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What is the term used to indicate the distance between the buccal surfaces of the maxillary posterior teeth and the buccal surfaces of their mandibular antagonists?
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What is the term for an abnormal relationship of one or more teeth to one or more teeth of the opposing arch, in the buccolingual or labiolingual direction?
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What is the term for a crossbite that is mainly due to a narrow maxillary arch?
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What do we call it when one or more of the lower incisors are in front of the upper incisors?
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What is the term for a crossbite due to buccal displacement of the affected posterior tooth from its ideal position?
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What is the classification based on location for crossbite when it affects only one side of the dental arch?
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True or False: Anterior crossbite refers to a condition where one or more of the lower incisors are behind the upper incisors.
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True or False: Posterior open bite refers to a type of malocclusion in which the vertical overlap of the anterior teeth is within the ideal relationship.
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Study Notes
Malocclusion Definitions
- Overbite refers to the horizontal overlap between the maxillary and mandibular incisors, where the lower incisal edges normally contact the lingual surface of the upper incisors at or below the cingulum.
- Overjet is defined as the vertical overlap of the incisors.
- An open bite involves no vertical overlap between maxillary and mandibular anterior teeth.
- There are two types of open bites: dental open bite, which affects only a few teeth due to local factors such as a digit-sucking habit, and skeletal open bite, which is caused by convergence of the skeletal mandibular and maxillary planes.
Vertical Overlap
- The term for the type of malocclusion in which the vertical overlap of the anterior teeth is increased beyond the ideal relationship is deep bite.
- The normal range for the vertical overlap of the anterior teeth is between 1-3 mm.
Buccal Relationship
- The term used to indicate the distance between the buccal surfaces of the maxillary posterior teeth and the buccal surfaces of their mandibular antagonists is buccal overjet.
Abnormal Tooth Relationships
- The term for an abnormal relationship of one or more teeth to one or more teeth of the opposing arch, in the buccolingual or labiolingual direction is crossbite.
- A crossbite that is mainly due to a narrow maxillary arch is called a scissor bite.
- When one or more of the lower incisors are in front of the upper incisors, it is called anterior crossbite.
- A crossbite due to buccal displacement of the affected posterior tooth from its ideal position is called buccal crossbite.
- The classification based on location for crossbite when it affects only one side of the dental arch is unilateral crossbite.
True or False Statements
- False: Anterior crossbite refers to a condition where one or more of the lower incisors are behind the upper incisors.
- False: Posterior open bite refers to a type of malocclusion in which the vertical overlap of the anterior teeth is within the ideal relationship.
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و هاي صح و خطأ تخص الملزمة الثالثة فقط بما انو ثجيلة شوية
