Fixed Orthodontic appliance
It is an appliance fixed to teeth by attachments through which force application is by arch wires or auxiliaries.
A large number of fixed appliance techniques are available, and the type of mechanism used will determine the nature of the tooth movement achieved.
Advantages of fixed appliances:
1. Precise control over force distribution to individual teeth.
2. Multiple (individual) tooth movement can be performed simultaneously in the same or different direction.
3. It is more comfortable than removable or myofunctional appliance , and does not depend on the patient wear since it fixed in his/her mouth.
Disadvantages of fixed appliance:
1.Expensive. 2.Require great skill. 3.It takes more chair time.
4.It needs good oral hygiene.
Limitations of fixed appliances
1.Attitude of the patient
Lack of motivation on the part of the patient is a main cause of failure in orthodontics , the orthodntist should discuss the treatment aims with the patients, without the parents being present.
2.Oral hygiene
An excellent standard of oral hygiene must be maintained through out the treatment , if oral hygiene is poor there is a great possibility of decalcification, caries is increased and periodontal problems will be more severe.
4- It needs good oral hygiene
ORTHODONTICS Assist.Lec.Kasem A.
University of Babylon Faculty of Dentistry 4th stage
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3.Implications of appliance wear
It is unfair to cement a fixed appliance without first explaining to the patient what the appliance is like, how it feel and how long it will have to be worn.
4.Cooperation
Cooperation of the patient through out the treatment is essential, the patient must understand the necessity for carrying out special instruction, if he is unwilling or unable to do this then he is not suitable for orthodontic treatment.
5.Medical history
The patient, s general medical condition must take into account before any orthodontic treatment.
Indications of fixed appliances
1. Correction of mild to moderate skeletal discrepancy of adult patient.
2.Intrusion and extrusion of teeth.
3.Correction of any rotation.
5.Multiple tooth movement with precise control.
History of fixed appliance
The orthodontic profession has gone through an evolving process to reach the current bracket system.
Dr.Edward Angle is considered the father of modern orthodontics, from early 1900 developed four major appliance system:
A)E(expansion)-arch.(left)
B)Pin and tube.(right)
C)Ribbon arch.
D)Edgewise
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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