We have located links that may give you full text access.
Comparative Study
Journal Article
A comparison of Twin Block, Andresen and removable appliances in the treatment of Class II Division 1 malocclusion.
Functional Orthodontist 1992 July
Cephalometric radiographs were taken before and after treatment in three groups of patients. Ten were treated with removable appliance therapy involving extraction of upper first premolars and retraction of anterior teeth. Ten were treated on a non extraction basis coupled with wearing an upper expansion appliance followed by an Andresen appliance. Another group of ten patients were treated in an identical manner except that they wore a Twin Block instead of the Andresen appliance. When comparing the patient groups before and after treatment, statistically significant differences were found for upper incisor angulation in the Removable (t = 9.49 p < 0.001) Andresen (t = 4.48 p < 0.001) Twin Block (t = 2.81 p < 0.001) groups and for angle ANB in the Andresen (t = 2.88 p < 0.01) and Twin Block (t = 2.65 p < 0.01) groups. Thus the overjet was reduced purely by incisor tipping with the removable appliance as would be expected, but both functional appliances produced some bodily correction with an improvement in the dental base relationship. Although the Twin Block appliance group showed a greater reduction in angle ANB this was not significantly different from that in the Andresen appliance group. The treatment time from insertion of the first appliance to reduction of the overjet to 3mm or less was also recorded. The treatment time for the Twin Block group (8.1 months) was significantly less (t = 2.79 p < 0.05) than the Andresen group (12.8 months), but neither functional group differed significantly from the removable appliance group (10.1 months).
Full text links
Related Resources
Trending Papers
Challenges in Septic Shock: From New Hemodynamics to Blood Purification Therapies.Journal of Personalized Medicine 2024 Februrary 4
Molecular Targets of Novel Therapeutics for Diabetic Kidney Disease: A New Era of Nephroprotection.International Journal of Molecular Sciences 2024 April 4
The 'Ten Commandments' for the 2023 European Society of Cardiology guidelines for the management of endocarditis.European Heart Journal 2024 April 18
A Guide to the Use of Vasopressors and Inotropes for Patients in Shock.Journal of Intensive Care Medicine 2024 April 14
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app