J Korean Acad Prosthodont.  2018 Apr;56(2):105-113. 10.4047/jkap.2018.56.2.105.

Three-dimensional finite element analysis according to the insertion depth of an immediately loaded implant in the anterior maxilla

• Park CW
• Kim SH
• Yeo IS
• Yoon HI
• Han JS

• KMID: 2410113
• DOI: http://doi.org/10.4047/jkap.2018.56.2.105

Abstract

PURPOSE
The purpose of this study was to investigate the effects of the insertion depth of an immediately loaded implant on the stress distribution of the surrounding bone and the micromovement of the implant using the three-dimensional finite element analysis.
MATERIALS AND METHODS
A total of five bone models were constructed such that the implant platform was positioned at the levels of 0.00 mm, 0.25 mm, 0.50 mm, 0.75 mm, and 1.00 mm depth from the crest of the cortical bone. A frictional coefficient of 0.3 and the insertion torque of 35 Ncm were simulated on the interface between the implant and surrounding bone. A static load of 178 N was applied to the provisional prosthesis with a vertical load in the axial direction and an oblique load at 30°with respect to the central axis of the implant, then a finite element analysis was performed.
RESULTS
The implant insertion depth significantly affected the stress distribution on the surrounding bone. The largest micromovement value of the implant was 39.34 µm. The oblique load contributed significantly to the stress distribution and micromovement in comparison to the vertical load.
CONCLUSION
Increasing the implant insertion depth was advantageous in dispersing the concentrated stress in the cortical bone and did not significantly affect the micromovement associated with early osseointegration failure.

Keyword

Dental implants; Immediate dental implant loading; Insertion depth; Finite element analysis

MeSH Terms

Dental Implants
Finite Element Analysis*
Friction
Immediate Dental Implant Loading
Maxilla*
Osseointegration
Prostheses and Implants
Torque
Dental Implants