Partial Flex® is a random copolymer that is designed for injection molding. It is a derivitive of a group known as the oleﬁnes.
Polymerization can proceed via either a free-radical or an ionic mechanism, converting the double to a single bond and forming single bonds to join the other monomers.
This chemical transformation can occur only under certain conditions of temperature and pressure, resulting in a thermoplastic material. It is ﬂexible, highly resistant to impact and possesses an excellent translucency comparable with any other superpolymer in its class.
The Partial Flex® base polymer is biocompatible, hypoallergenic, and non-toxic for human use. Extensive studies carried out by Toxicon Safety Studies Europe N.V. (Belgium) verify these characteristics. Partial Flex® also has CE, ISO 13485:2012 certiﬁcation which certiﬁes its quality in manufacturing. Partial Flex® has been successfully tested at the prestigious International University of Catalanyua.
Partial Flex® is an ideal material for the manufacture of ﬂexible removable dentures. Due to its physical-chemical properties we can obtain a removable prosthesis that is ﬂexible, lightweight and highly translucent, having a minimum thickness of 1mm. This allows us to offer the patient both a comfortable and aesthetically pleasing ﬁt.
The concept of a metal-free prosthesis has resulted in the wrongful criticism of them, even to the point of making mistaken assumptions. There is for example the claim that a ﬂexible prosthesis will massage the gums and bone, stopping bone resorption. This idea has no scientiﬁc basis.
As the pathophysiology of maxillary or mandibular bones has proved, resorption exists even in the presence of teeth, caused either by periodontal problems or by poor dental hygiene. If the essential building blocks called teeth are missing, the problem is even greater, since bone loss is accelerated and the blood supply is restricted to trabecular bone, which is greater in the maxilla than in the jaw. This can be clearly seen in an edentulous patient, where the jaw suffers a greater basal destruction than the maxilla.
Now if we insert only a ﬂexible tissue-borne prosthesis, bone resorption is evident. But why not insert a tooth-borne prosthesis? This is achieved very easily by placing metal occlusal rests or more metal connectors. While these attachments do not reduce ﬂexibility in the prosthesis, they do provide stability and support for the teeth.
Partial Flex® is an exellent alternative to avoid the use of metal. It takes into account the importance of attaining an occlusal balance, as well as to avoiding the ischemic areas when inserting the prosthesis. It also helps avoid the abuse of retainers on every pilar tooth, since retention is achieved through the path of insertion.