Abstract
Background: The goal of this study was to analyze the stress distribution on two types of extra-short dental implants with 5 mm of length: An internal hexagon (IH) and morse taper connection (MT). Methods: The three-dimensional model was composed of trabecular and cortical bone, a crown, an extra-short dental implant and their components. An axial load of 150 N was applied and another inclined 30° with the same magnitude. Results: Stress concentrations on the IH implant are observed in the region of the first threads for the screw. However, in the MT implant the highest stress occurs at the edges of the upper implant platform. Conclusions: In view of the results obtained in this study the two types of prosthetic fittings present a good stress distribution. The Morse taper connections presented better behavior than the internal in both loading configurations.
Highlights
The posterior areas of the mandible are affected by reabsorption with a high degree of vertical bone loss, especially in a patient who maintains these areas without rehabilitating for a long time or using removable prostheses for a long period of time
In the morse taper connection (MT) implant the highest stress occurs at the edges of the upper implant platfofrimgur(FeF,iigtghuuererve8es8sthfi)bo.uwlasrthaeresatrheasss distribution on extra-short implants a bigger stress than the distal one
Stress concentrations on the internal hexagon (IH) implant are observed in the region of the first threads for the Rsecrgeawrd(iFniggutrhee8cIH)
Summary
The posterior areas of the mandible are affected by reabsorption with a high degree of vertical bone loss, especially in a patient who maintains these areas without rehabilitating for a long time or using removable prostheses for a long period of time. Patients with bone atrophies or reduced bone height can have difficulties to perform treatments with conventional dental implants In these circumstances, clinicians usually use more invasive and expensive techniques [1] such as bone grafting, bone regeneration, transposition of the dental nerve or the use of unconventional implants (tilted, transmandibular) [2,3]. Clinicians usually use more invasive and expensive techniques [1] such as bone grafting, bone regeneration, transposition of the dental nerve or the use of unconventional implants (tilted, transmandibular) [2,3] An alternative to these invasive treatments are short implants, which have an important goal when a treatment in maxillary and mandible is necessary with a less invasive procedure and a good predictability [4]. The goal of this study was to analyze the stress distribution on two types of extra-short dental implants with 5 mm of length: An internal hexagon (IH) and morse taper connection (MT). The Morse taper connections presented better behavior than the internal in both loading configurations
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