Abstract
Clinical studies indicate that loosening or fracture of dental implant prostheses occurs in 5% to 45% of cases during the first year. The nature of loosening or displacement of prosthetic components is complex, since it involves cycling fatigue, oral fluids, and varied chewing patterns and loads. A finite element contact analysis method was used to study the load-transfer mechanism between prosthetic components caused by torque application to the threaded fasteners used for assembly. Screw elongation is achieved while allowing for elastic recovery of the screw to produce a clamping force on the fastened elements. Clamping forces were additive along the axis of the prosthetic components. When the gold retaining screw is fastened into the abutment screw, clamping force on the implant is increased at the expense of decreasing the clamping force at the abutment screw-abutment interface by 50%. Maximum tensile stresses in the screws after preload were less than 55% of the yield stress.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1-14 |
| Number of pages | 14 |
| Journal | International Journal of Oral and Maxillofacial Implants |
| Volume | 10 |
| Issue number | 3 |
| State | Published - 1995 |
| Externally published | Yes |
Fingerprint
Keywords
- Biomechanics
- Contact analysis
- Finite element analysis
- Implants
- Prosthetics
ASJC Scopus subject areas
- Medicine(all)
Cite this
Nonlinear contact analysis of preload in dental implant screws. / Sakaguchi, Ronald; Borgersen, Svenn E.
In: International Journal of Oral and Maxillofacial Implants, Vol. 10, No. 3, 1995, p. 1-14.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nonlinear contact analysis of preload in dental implant screws
AU - Sakaguchi, Ronald
AU - Borgersen, Svenn E.
PY - 1995
Y1 - 1995
N2 - Clinical studies indicate that loosening or fracture of dental implant prostheses occurs in 5% to 45% of cases during the first year. The nature of loosening or displacement of prosthetic components is complex, since it involves cycling fatigue, oral fluids, and varied chewing patterns and loads. A finite element contact analysis method was used to study the load-transfer mechanism between prosthetic components caused by torque application to the threaded fasteners used for assembly. Screw elongation is achieved while allowing for elastic recovery of the screw to produce a clamping force on the fastened elements. Clamping forces were additive along the axis of the prosthetic components. When the gold retaining screw is fastened into the abutment screw, clamping force on the implant is increased at the expense of decreasing the clamping force at the abutment screw-abutment interface by 50%. Maximum tensile stresses in the screws after preload were less than 55% of the yield stress.
AB - Clinical studies indicate that loosening or fracture of dental implant prostheses occurs in 5% to 45% of cases during the first year. The nature of loosening or displacement of prosthetic components is complex, since it involves cycling fatigue, oral fluids, and varied chewing patterns and loads. A finite element contact analysis method was used to study the load-transfer mechanism between prosthetic components caused by torque application to the threaded fasteners used for assembly. Screw elongation is achieved while allowing for elastic recovery of the screw to produce a clamping force on the fastened elements. Clamping forces were additive along the axis of the prosthetic components. When the gold retaining screw is fastened into the abutment screw, clamping force on the implant is increased at the expense of decreasing the clamping force at the abutment screw-abutment interface by 50%. Maximum tensile stresses in the screws after preload were less than 55% of the yield stress.
KW - Biomechanics
KW - Contact analysis
KW - Finite element analysis
KW - Implants
KW - Prosthetics
UR - http://www.scopus.com/inward/record.url?scp=84995773050&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84995773050&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:84995773050
VL - 10
SP - 1
EP - 14
JO - The International journal of oral & maxillofacial implants
JF - The International journal of oral & maxillofacial implants
SN - 0882-2786
IS - 3
ER -