Podcast
Questions and Answers
What is the definition of overbite?
What is the definition of overbite?
- No vertical contact between maxillary and mandibular posterior teeth
- Divergence of the skeletal mandibular or maxillary planes
- Horizontal overlap of the incisors
- Vertical overlap between the maxillary and mandibular incisors (correct)
What is the definition of overjet?
What is the definition of overjet?
- Localized open bite involving only a few teeth
- Vertical overlap between the maxillary and mandibular incisors
- Horizontal overlap of the incisors (correct)
- Increased facial height due to divergence of skeletal planes
What is an open bite (Negative overbite) characterized by?
What is an open bite (Negative overbite) characterized by?
- Horizontal overlap of the incisors
- Vertical overlap between the maxillary and mandibular incisors
- Inherited, developmental, or acquired malocclusion with no vertical overlap (correct)
- Divergence of the skeletal mandibular or maxillary planes
What causes a dental open bite?
What causes a dental open bite?
What causes a skeletal open bite?
What causes a skeletal open bite?
What is the normal vertical overlap between the maxillary and mandibular incisors?
What is the normal vertical overlap between the maxillary and mandibular incisors?
What is the ideal range of vertical overlap for the anterior teeth?
What is the ideal range of vertical overlap for the anterior teeth?
In which type of malocclusion does the vertical overlap of the anterior teeth exceed the normal range?
In which type of malocclusion does the vertical overlap of the anterior teeth exceed the normal range?
What is the term used to indicate the distance between the buccal surfaces of the maxillary posterior teeth and their mandibular antagonists?
What is the term used to indicate the distance between the buccal surfaces of the maxillary posterior teeth and their mandibular antagonists?
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?
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?
Which type of crossbite is mainly due to a narrow maxillary arch?
Which type of crossbite is mainly due to a narrow maxillary arch?
If one or more of the lower incisors are in front of the upper incisors, what is this condition called?
If one or more of the lower incisors are in front of the upper incisors, what is this condition called?
Study Notes
Occlusion and Malocclusion
- Overbite refers to the vertical overlap between the maxillary and mandibular incisors.
- Overjet refers to the horizontal distance between the maxillary and mandibular incisors.
Open Bite (Negative Overbite)
- Characterized by a lack of vertical overlap between the maxillary and mandibular incisors.
Causes of Open Bite
- Dental open bite: caused by abnormal eruption patterns or habits such as thumb-sucking.
- Skeletal open bite: caused by a discrepancy in the size or shape of the maxilla and mandible.
Normal Vertical Overlap
- Normal vertical overlap between the maxillary and mandibular incisors is 3-5 mm.
- Ideal range of vertical overlap for the anterior teeth is 2-4 mm.
Deep Bite
- Characterized by a vertical overlap of the anterior teeth that exceeds the normal range.
Terms in Occlusion
- The term "buccal clearance" refers to the distance between the buccal surfaces of the maxillary posterior teeth and their mandibular antagonists.
- "Crossbite" refers to an abnormal relationship of one or more teeth to one or more teeth of the opposing arch, in the buccolingual or labiolingual direction.
Types of Crossbite
- A narrow maxillary arch can cause a posterior crossbite.
- An anterior crossbite occurs when one or more of the lower incisors are in front of the upper incisors.
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