Advantages and Disadvantages of Double Threaded Dental Implant Screws As Opposed to Single‐Threaded: A Study from a Biomechanical Perspective by the Finite Element Method

The purpose of the present article is to study the advantages from a biomechanical point of view of the use of a double‐threaded dental implant over the more common single‐threaded one. For this purpose a 3D model of a portion of the jaw was generated. In this model four different bone areas were distinguished (transition cortical, transition trabecular, bulk cortical and bulk trabecular). Not only was the portion of the jaw created with CAD software but also two different implants geometries, one with only one thread (single‐threaded) and the other with two threads (double‐threaded). The loading condition was defined as 150 N intrusive forces and 15 N lingual‐labial forces acting on the implant. The results of the present study shown that from a macroscopic point of view, the choice of one or other of the dental implants does not make a significant difference in the general behaviour of the jaw. In spite of this and notwithstanding the effects of the transition bone‐implant, the stress distribution achieved by the single‐threaded dental implant is more uniform. This effect is better for the biomechanics of the jaw. The advantage presented by the double threaded implant is that due to its larger surface the osseointegration is better than in the single‐threaded version.