Light maxillary expansion forces with the magnetic expansion device. A preliminary investigation

An active maxillary magnetic expansion device (MED) was developed to be used clinically. The aim was to show the effects of light and continuous forces producing less traumatic stimulation of maxillary sutural growth than a conventional rapid maxillary expansion device. In this study, two different...

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Bibliographic Details
Published in:European journal of orthodontics 1994-12, Vol.16 (6), p.479-490
Main Authors: Darendeliler, M. Ali, Strahm, C., Joho, J. P.
Format: Article
Language:English
Subjects:
Activator Appliances
Adolescent
Biomechanical Phenomena
Cephalometry
Child
Cobalt
Cranial Sutures - diagnostic imaging
Cranial Sutures - growth & development
Dental Bonding
Dental Models
Dentistry
Humans
Magnetics - therapeutic use
Maxilla - diagnostic imaging
Maxilla - growth & development
Orthodontic Appliance Design
Palatal Expansion Technique - instrumentation
Prostheses and Implants
Radiography
Samarium
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Description
Summary:An active maxillary magnetic expansion device (MED) was developed to be used clinically. The aim was to show the effects of light and continuous forces producing less traumatic stimulation of maxillary sutural growth than a conventional rapid maxillary expansion device. In this study, two different types of appliances were used on six patients between 7 years 4 months and 16 years 2 months: the first type was bonded, the other one used bands. For better appreciation, four implants were placed on each patient: two apically between central and lateral incisors, and two between second premolars and molars. A standardized radio-graphic technique was used to take occlusal radiographs, and postero-anterior and lateral headplates. The results varied according to the age and the appliance used. The skeletal effect with the banded MED was between 16 and 77 per cent, and for the bonded MED 0 and 25 per cent in comparison to the overall expansion. It seems that 250–500 g of continuous magnetic forces can produce dental and skeletal movements in a light force expansion concept, but further studies with larger samples are needed to make firm conclusions.
ISSN:0141-5387
1460-2210
DOI:10.1093/ejo/16.6.479