Class 1 Malocclusion Flashcards

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Questions and Answers

You must know the normal and the normal variation so you can identify any deviation and pinpoint the problem.

True

Based on the following observations, determine the status: 5yr with primary dentition and spacing.

No problem/normal (correct)

Actual problem

Potential problem

Based on the provided descriptions, classify the dental observations.

No problem/normal

Actual problem (correct)

Potential problem (correct)

The relationship between the upper and lower teeth is defined as and .

rest, during function Signup and view all the answers

Class ___ Occlusion: Mesio-buccal cusp of maxillary first molar is aligned with buccal groove of mandibular first molar.

1 Signup and view all the answers

The two components of normal occlusion are the relationship between the upper and lower teeth and the ______ passing through upper and lower arch.

curve Signup and view all the answers

What is class 1 malocclusion?

Jaws are proportioned normally, but one or more teeth are misaligned. Signup and view all the answers

What is the percentage of normal occlusion?

30% Signup and view all the answers

What is the percentage of class 1 malocclusion?

50-55% Signup and view all the answers

_____ is the degree of vertical overlap of the mandibular incisors by the maxillary incisors when the posterior teeth are in occlusion.

Overbite / deep bite Signup and view all the answers

In a normal occlusion, the upper and lower arches should fit and interlock.

True Signup and view all the answers

Crossbite is characterized by what?

Maxillary arch is narrow. Signup and view all the answers

What are the three components of malocclusion?

Skeletal component, dental component, facial component. Signup and view all the answers

What does it mean if teeth were lost after trauma?

Space should be maintained, or else neighboring teeth will drift into the space. Signup and view all the answers

Abnormal labial frenum does not prevent orthodontic space closure.

True Signup and view all the answers

What is the most common environmental habit causing malocclusion?

Thumb sucking. Signup and view all the answers

Study Notes

Malocclusion Overview

Understanding normal occlusion and its variations is crucial for identifying deviations and diagnosing issues.
Malocclusion can be classified as no problem (normal), potential problem (needs monitoring), or actual problem (requires treatment).

Occlusion Definition

Occlusion refers to the upper and lower teeth's relationship during rest and function.
Class 1 Occlusion features the mesio-buccal cusp of the maxillary first molar aligning with the buccal groove of the mandibular first molar.

Components of Normal Occlusion

Two main components include the relationship between upper and lower teeth and a curve passing through both arches.
The upper arch curve includes the central fossa of molars and premolars, while the lower arch comprises buccal cusps of molars and incisal edges of anterior teeth.

Malocclusion Classification

Malocclusion is evaluated in three spatial planes: sagittal, vertical, and transverse, as well as time (dental age/growth).
Class 1 malocclusion involves normal jaw proportions but misalignment of one or more teeth.

Prevalence of Occlusion Types

Normal occlusion: 30%
Class 1 malocclusion: 50-55%
Class 2 malocclusion: 15%
Class 3 malocclusion: 1%

Overbite (deep bite) measures vertical overlap of mandibular incisors by maxillary incisors.
Normal occlusion achieves a zipper-like interlocking fit between upper and lower arches.

Comparing Bite Types

Crossbite indicates a narrow maxillary arch, while scissor bite reflects a wider maxillary arch.
Malocclusion impacts periodontal health, oral health, function and TMJ, dental injury risk, and psychosocial well-being.

Effects and Causes of Malocclusion

Crowded teeth correlate with poorer oral hygiene and increased dental issues.
Traumatic events, developmental anomalies, and spatial concerns cause this condition.

Tooth Number and Eruption Considerations

Congenitally missing or supernumerary teeth can lead to developmental problems.
Monitoring dental age and eruption patterns is key for treatment planning.

Environmental Factors

Trauma and habits, such as thumb sucking, can lead to malocclusion.
Thumb sucking affects occlusion based on the habit's duration, frequency, and intensity.

Spacing and Crowding in Dentition

Spaced deciduous dentition promotes proper permanent dentition development.
Lack of spacing indicates jaw-tooth size disproportion.

Growth Monitoring and Treatment Approaches

Arch length deficiency (ALD) arises when required space exceeds available space.
Treatment includes various strategies to create space, such as distalizing teeth, expansion, or extraction.

Final Notes on Management

Primary teeth serve as important space maintainers; early loss can lead to crowding if not managed properly.
Referral to an orthodontist is recommended during late mixed dentition for optimal treatment.

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Description

Test your knowledge of Class 1 malocclusions with these flashcards. Learn to identify normal variations and potential problems through images and definitions. Enhance your understanding of dental occlusion and improve your diagnostic skills.