As a result of our study regarding the vertical forces on our product applied in toothless areas for various indications in a few questions;
First of all, Prof. Dr. Bülent Cumhur Uludağ and Assoc. Dr. I would like to start by emphasizing some of the determinations in the relevant stress analysis of our product, which Emre Tokar made seven years ago.
In the test analysis, it was stated that they used three implants in the mandible, two implants were placed 11 mm to the right and left of the middle implant, and our product forming the lock system was connected to the distal of them connected with a bar.
In other words, the structure formed by our 8-member ceramic crowns work on the front three implants and the placement of the crown apparatus of our system on the distal and the implants have formed a single-piece structure.
In the test analysis performed, 100 N force was applied vertically at the point that hit the tooth area no. 6 in the edentulous area, and as a result, 1.39 mm N stress lines in the apex area of the right implant and 1.22 N in the edentulous area were observed.
In the middle implant and the left implant, there were no stress lines in the apex area and the left edentulous area.
Therefore, we have been asked with a concern that the impact of destructive forces cannot be met by implants in the study performed with the application of our product named rk-1 Uni C, which we applied to the distal of the fixed application with three implants.As seen in the test analyzes, the 1.39 N stress created by the 100 N vertical force applied to the distal of the implants to which our product is applied. It is in the moderate stress category. In addition, matching ceramic in the form of a saddle is made in the lower part of the tooth number seven of our products, and it is ensured that the chewing forces coming to the toothless area are transferred to the crest.
The chewing forces coming to the toothless area are absorbed by the POM (Polyoxymethylene) holder in our product and transmitted to the crest that it is compatible with the saddle style ceramic work together with the resilience feature up to 6 degrees due to the design.
This product, called the rk-1 Uni C Plus, has this potential, but thanks to its compatible crest support, it will use as much as the crest allows from this 6 degree and protect the support elements from force transmission.
While calculating all of these, we actually examined the effect of chewing forces in 3 regions and finally came to the conclusion by considering their combination. Namely;
We do not have a problem in cases where we are convinced that the vertical and horizontal forces directly applied to the support staff of the 1st region will support them in practice and we give the indication approval.
2. The effects of effective forces on the intermediate body or sensitive holder connection in the areas where the region support elements are connected.
Here, too, we can come to a conclusion by putting the ante rule into play.
Resources I use;
Subject of the lesson: Supportive tooth selection and bridge biomechanics in fixed dentures
Prof. dr. Mehmet Ali Kilicarslan
Ankara University Faculty of Dentistry
While teeth are considered structurally as a fixed prosthesis support; The current crown-root ratio, the root configuration of the tooth and the surface area covered by the periodontal membrane are looked at.