HOME - Clinical cases - Orthodontics
 
 
22 May 2019

3D-printed retainers VS thermoform retainers: which have the best fit?

Massimo Gagliani


Recent advances in digital dentistry have paved the way for the use of computer-aided design (CAD) technology in the modern orthodontic practice. Today, a 3-dimensional (3D) digital model, produced with an intraoral scanner, can be easily manipulated to perform the necessary measurements to facilitate diagnosis and treatment planning. In addition, digital technology eliminates the need for storage space and makes the retrieval and transfer of the models easier.  
In the study of Colea et al., published on the American Journal of Orthodontics and Dentofacial Orthopedics, 24 models were taken, both with traditional anagogic techniques (alginate impressions) and with intra-oral scanners (two groups). The first group the retainer was thermo formed while a digital printer was employed for the second group and third group using an STL file.      

Average differences of the conventional vacuum-formed retainers ranged from 0.10 to 0.20 mm. The commercially available and 3D-printed retainers had ranges of 0.10 to 0.30 mm and 0.10 to 0.40 mm, respectively.   

The traditional vacuum-formed retainers had the least amount of deviation from the original model. 3D-printed retainers are good alternatives to the traditional vacuum-formed retainers. Retainers may be successfully 3D printed with the use of stereolithography technology.

Related articles

Open bite  is considered as a deviation in the vertical relationship of the maxillary and mandibular dental arches, characterized by a lack of contact between opposing segments of teeth. Open bite...


In the latest issue (December 2019) of the American Journal of Orthodontics and Dentofacial Orthopedics an article was published to identify factors that ...


In the latest issue (November 2019) of The Angle Orthodontist an article was published about a retrospective study to evaluate the treatment effects produced...


In the latest issue (November 2019) of the Angle Orthodontist an article was published about a technique developed to help the removal composite during...


In specific types of cases, removal of one mandibular incisor can greatly facilitate orthodontic treatment. There are 2 primary indications: (1) severe...


Read more

Bisphosphonates are widely used for the treatment of abnormal bone metabolism for example in osteoporosis. Their continuative use leads to a strong inhibition...


Author: Luigi Campopiano

1. In the light of the fact that the 9 trillion euro of Italian savings are more than 90 % invested in Italy in euros, it is a good idea to expand the scope of investments to other markets that...


Demand of esthetic outcomes is becoming more and more frequent in dentistry and ceramic laminate veneers represent one of the main choices to functionally and...


There is still no accordance on the antibiotic prophylaxis regimen to prevent failures or postoperative infections in healthy patients undergoing standard implant surgery.Some authors proposed...


Editorials     28 July 2020

Welcome Summer 2020

Dear readers, Summer 2020 is definitely a strange and, under certain aspects, never existing season for our planet. The recent notorious burst of...


 
 
 
 

Newsletter

 
 
 
 

Most popular

 
 

Events