5. The plan and organizational structure of lecture.

№	The basic stages of lecture and their maintenance(contents)	Type of lecture. Means of activation of students. Materials of methodical maintenance	Distribution of time
1.	Preparatory stage. Definition of a urgency of a theme, the educational purposes and motivation.	Introductory, clinical lecture with elements of problematical character.	5 %
2.	The basic stage. Teaching of a lecture material under the plan. 1. The characteristic of the basic stages of development domestic and foreign ортогнатической surgeries. 2. Known classifications of replacement of skeletal anomalies of a bite. 3. A substantiation of concept " orthodontic surgery ". 4. Classifications of different kinds оrtognatic operations. 5. The characteristic of separate stages of planning оrtognatic operations. 6. The basic kinds ortognatic operations: by Limberg, by Semenchenko, Dal Pont, Obwegeser and ect.	Clinical lecture with application of presentation: multimedia support the decision of problem situations, situational problems(tasks), thematic patients.	85 %
3.	The final stage. The resume of lecture, the general(common) conclusions. Answers to questions. The task for self-preparation of students.	The educational literature. Methodical development of faculty. The task for self-preparation.	10 %

Classification of Face

It is not sufficient to categorize orthodontic malocclusions on the basis of a classification of the teeth alone. The relationship with other craniofacial structures must also be taken into consideration.

Class 1

Maxillary-Mandibular Dental Protrusion — teeth:

This is an example of a dental malocclusion that may require the removal of teeth for correction.

Maxillary-Mandibular Dental Retrusion — teeth:

This is an example of a dental malocclusion that may be treated with expansion rather than removing teeth.

Class 2

Maxillary Dental Protrusion — teeth:

This malocclusion may require the removal of teeth.

Mandibular Retrognathism — jaws:

The lower jawbone has not grown as much as the upper jaw. This example of a Class II malocclusion demonstrates the need for early growth guidance.

Maxillary Dental Protrusion — teeth & Mandibular Retrognathism — jaws

These Class malocclusions are more difficult to treat due to the skeletal disharmony and may require orthognathic surgery in conjunction with orthodontic treatment.

Class 3

Mandibular Dental Protrusion — teeth:

The lower teeth are too far in front of the upper teeth. This malocclusion is treated with orthodontic procedures which may require the extraction of teeth due to the dental protrusion.

Mandibular Prognathism — jaws:

The lower jaw bone has outgrown the upper jaw. This malocclusion is more difficult to treat due to the skeletal disharmony and may require orthognathic surgery in conjunction with orthodontic treatment.

Начало формы

Types of Bites

Class 1 Bite	The Class 1 bite is “The Perfect Bite”. This is the bite structure we aim to achieve for all our patients.
Class 2 Division 1	Class 2 Division 2
Class 3 Bite	Deep Bite
Open Bite

Crossbite

Classification of Teeth Overview

For a brief overview of the classification of teeth, please click on the image below. It will launch our flash educational module in a separate window that may answer some of your questions about the classifications of teeth.

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One or more of the upper teeth biting on the inside of the lower teeth characterizes a crossbite. A crossbite can occur in the front and/or the sides of the mouth. Early correction of crossbites is recommended and necessary.

Crossbites should be corrected because they can:

• Cause premature wear of the teeth.

• Cause gum disease including bone loss.

• Cause asymmetrical development of the jaws.

• Cause dysfunctional chewing patterns.

• Make your smile less attractive.

• Be related to jaw joint dysfunction (TMJ).

How can a crossbite be orthodontically corrected?

If there is a single tooth crossbite, braces or a retainer may be used to move it into the correct position. If multiple teeth are in crossbite, a palatal expander of some type is normally required.

Openbite

Inadequate vertical overlap of the front teeth characterizes an openbite. It is caused by oral habits such as tongue thrust, digit sucking, or jaws that don't grow evenly. Timing of treatment is critical to the overall success of the therapy.

Openbite should be corrected because it can:

• Cause premature wear of the back teeth.

• Cause dysfunctional chewing patterns.

• Make your smile less attractive.

• Be related to jaw joint dysfunction (TMJ).

How can an openbite be orthodontically corrected?

Openbite can be corrected through growth modification of the jaws; extrusion of the front teeth; and in some severe cases surgical correction is required for the jaws. Breaking oral habits such as digit sucking will facilitate the correction of an openbite and make the result more stable.  Early recognition and treatment is critical to avoiding surgical intervention.

Overbite

Overbite is a measure of the vertical overlap of the upper and lower front teeth. Excessive overbite may be caused by disproportionate eruption of front teeth or over development of the bone that supports the teeth. Excessive overbite is commonly seen in conjunction with a Class II relationship (see below). Overbite is also known as a deep bite.

Overbite should be corrected because it can:

• Cause improper functioning of your front teeth.

• Result in the lower front teeth biting into the gum tissue of the palate leading to periodontal problems.

• Cause unusual wear of the lower front teeth.

• Make your smile less attractive.

How can an overbite be orthodontically corrected?

Overbite can be corrected through orthodontic leveling of the front and/or back teeth.

Overbite

Overjet

Overjet is measure of the horizontal relationship of the upper and lower front teeth. It is often called buck teeth and is commonly confused with overbite. Excessive overjet may be caused by improper alignment of the molars (Class II relationship), a skeletal imbalance of the upper and lower jaw(s), flared upper incisors, missing lower teeth, crowded or tipped back lower teeth, or a combination of all. In addition, oral habits such as digit sucking or tongue thrusting can exacerbate the condition.

Overjet

Overjet should be corrected because it can:

• Prevent proper functioning of the front teeth.

• Lead to premature wear.

• Make your smile less attractive.

Underbite

The lower teeth biting in front of the upper teeth characterizes an underbite. An underbite is usually caused by undergrowth of the upper jaw, overgrowth of the lower jaw, or a combination of the two (Class III relationship). Underbite can also be caused by tipped back upper incisors, flared lower incisors, missing upper teeth, or a combination of all.