Overjet: Difference between revisions
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{{Infobox medical condition | |||
[[File:Overjet-overbite.png|thumb| | | name = Overjet | ||
| image = [[File:Overjet-overbite.png|left|thumb|Illustration of overjet]] | |||
| caption = Illustration of overjet | |||
| field = [[Dentistry]] | |||
| synonyms = Horizontal overlap | |||
| symptoms = [[Protrusion]] of the upper teeth | |||
| complications = [[Tooth wear]], [[jaw pain]], [[speech difficulties]] | |||
| onset = Childhood | |||
| duration = Long-term | |||
| causes = [[Genetics]], [[thumb sucking]], [[tongue thrusting]] | |||
| risks = [[Malocclusion]], [[dental trauma]] | |||
| diagnosis = [[Dental examination]], [[cephalometric analysis]] | |||
| differential = [[Overbite]], [[crossbite]] | |||
| prevention = Early [[orthodontic treatment]], cessation of habits like thumb sucking | |||
| treatment = [[Braces]], [[orthodontic appliances]], [[jaw surgery]] | |||
| prognosis = Good with treatment | |||
| frequency = Common | |||
}} | |||
'''Overjet''' refers to the horizontal distance between the upper front teeth (maxillary incisors) and the lower front teeth (mandibular incisors). It is a common dental measurement used to assess the alignment and occlusion of teeth. | '''Overjet''' refers to the horizontal distance between the upper front teeth (maxillary incisors) and the lower front teeth (mandibular incisors). It is a common dental measurement used to assess the alignment and occlusion of teeth. | ||
== Definition == | == Definition == | ||
In dental terms, overjet is the extent of horizontal (anterior-posterior) overlap of the maxillary central incisors over the mandibular central incisors. It is typically measured in millimeters using a periodontal probe or a ruler. | In dental terms, overjet is the extent of horizontal (anterior-posterior) overlap of the maxillary central incisors over the mandibular central incisors. It is typically measured in millimeters using a periodontal probe or a ruler. | ||
== Normal Overjet == | == Normal Overjet == | ||
A normal overjet is considered to be around 2 to 3 millimeters. This allows for proper function and aesthetics of the teeth. A normal overjet ensures that the teeth can effectively cut and chew food, and it also contributes to the overall appearance of the smile. | A normal overjet is considered to be around 2 to 3 millimeters. This allows for proper function and aesthetics of the teeth. A normal overjet ensures that the teeth can effectively cut and chew food, and it also contributes to the overall appearance of the smile. | ||
== Increased Overjet == | == Increased Overjet == | ||
An increased overjet, often referred to as "protrusion," occurs when the maxillary incisors are significantly forward of the mandibular incisors. This condition can be caused by: | An increased overjet, often referred to as "protrusion," occurs when the maxillary incisors are significantly forward of the mandibular incisors. This condition can be caused by: | ||
* [[Genetics]] | * [[Genetics]] | ||
* [[Thumb sucking]] | * [[Thumb sucking]] | ||
* [[Tongue thrusting]] | * [[Tongue thrusting]] | ||
* [[Skeletal discrepancies]] | * [[Skeletal discrepancies]] | ||
Increased overjet can lead to functional problems such as difficulty in biting and increased risk of trauma to the protruded teeth. | Increased overjet can lead to functional problems such as difficulty in biting and increased risk of trauma to the protruded teeth. | ||
== Decreased Overjet == | == Decreased Overjet == | ||
A decreased overjet, sometimes called "reverse overjet" or "anterior crossbite," occurs when the mandibular incisors are positioned in front of the maxillary incisors. This condition can be associated with: | A decreased overjet, sometimes called "reverse overjet" or "anterior crossbite," occurs when the mandibular incisors are positioned in front of the maxillary incisors. This condition can be associated with: | ||
* [[Class III malocclusion]] | * [[Class III malocclusion]] | ||
* [[Mandibular prognathism]] | * [[Mandibular prognathism]] | ||
* [[Maxillary retrusion]] | * [[Maxillary retrusion]] | ||
Decreased overjet can affect the aesthetics of the smile and may lead to functional issues such as improper incisal guidance. | Decreased overjet can affect the aesthetics of the smile and may lead to functional issues such as improper incisal guidance. | ||
== Clinical Significance == | == Clinical Significance == | ||
Assessing overjet is crucial in orthodontic diagnosis and treatment planning. It helps in determining the type of malocclusion and the appropriate treatment approach, which may include: | Assessing overjet is crucial in orthodontic diagnosis and treatment planning. It helps in determining the type of malocclusion and the appropriate treatment approach, which may include: | ||
* [[Orthodontic braces]] | * [[Orthodontic braces]] | ||
* [[Functional appliances]] | * [[Functional appliances]] | ||
* [[Orthognathic surgery]] | * [[Orthognathic surgery]] | ||
== See also == | |||
== | |||
* [[Overbite]] | * [[Overbite]] | ||
* [[Malocclusion]] | * [[Malocclusion]] | ||
* [[Orthodontics]] | * [[Orthodontics]] | ||
* [[Dental occlusion]] | * [[Dental occlusion]] | ||
[[Category:Dentistry]] | [[Category:Dentistry]] | ||
[[Category:Orthodontics]] | [[Category:Orthodontics]] | ||
Latest revision as of 15:26, 8 April 2025
Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD's medical weight loss NYC, sleep center NYC
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| Overjet | |
|---|---|
 | |
| Synonyms | Horizontal overlap |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Protrusion of the upper teeth |
| Complications | Tooth wear, jaw pain, speech difficulties |
| Onset | Childhood |
| Duration | Long-term |
| Types | N/A |
| Causes | Genetics, thumb sucking, tongue thrusting |
| Risks | Malocclusion, dental trauma |
| Diagnosis | Dental examination, cephalometric analysis |
| Differential diagnosis | Overbite, crossbite |
| Prevention | Early orthodontic treatment, cessation of habits like thumb sucking |
| Treatment | Braces, orthodontic appliances, jaw surgery |
| Medication | N/A |
| Prognosis | Good with treatment |
| Frequency | Common |
| Deaths | N/A |
Overjet refers to the horizontal distance between the upper front teeth (maxillary incisors) and the lower front teeth (mandibular incisors). It is a common dental measurement used to assess the alignment and occlusion of teeth.
Definition[edit]
In dental terms, overjet is the extent of horizontal (anterior-posterior) overlap of the maxillary central incisors over the mandibular central incisors. It is typically measured in millimeters using a periodontal probe or a ruler.
Normal Overjet[edit]
A normal overjet is considered to be around 2 to 3 millimeters. This allows for proper function and aesthetics of the teeth. A normal overjet ensures that the teeth can effectively cut and chew food, and it also contributes to the overall appearance of the smile.
Increased Overjet[edit]
An increased overjet, often referred to as "protrusion," occurs when the maxillary incisors are significantly forward of the mandibular incisors. This condition can be caused by:
Increased overjet can lead to functional problems such as difficulty in biting and increased risk of trauma to the protruded teeth.
Decreased Overjet[edit]
A decreased overjet, sometimes called "reverse overjet" or "anterior crossbite," occurs when the mandibular incisors are positioned in front of the maxillary incisors. This condition can be associated with:
Decreased overjet can affect the aesthetics of the smile and may lead to functional issues such as improper incisal guidance.
Clinical Significance[edit]
Assessing overjet is crucial in orthodontic diagnosis and treatment planning. It helps in determining the type of malocclusion and the appropriate treatment approach, which may include:
