A vitro study of retained screw stability by various connection designs between fixture and abutment in implant dentistry / 대한치과보철학회지
The Journal of Korean Academy of Prosthodontics
;
: 83-93, 2004.
Article
in Korean
| WPRIM
| ID: wpr-127340
ABSTRACT
STATEMENT OF PROBLEM:
Since the concept of osseointegrated dental implant by Branemark et al was first applied to mandibular full edentulous patients. Recently it is considerated the first treatment option on missing teeth. A common problem associated with dental implant restorations is loosening of screws that retain the prosthesis to the abutment and the abutment to the implant fixture.PURPOSE:
This study is to examine the influence on screw loosening of implant-abutment designs. MATERIAL ANDMETHODS:
External hex, cone screw, beveled hex, cam cylinder, cylinder hex by means of evaluating the loosening torques, with respect to a range of tightening torques after repeated loading.RESULT:
1. Cone screw, beveled hex groups are the highest initial tightening rate and cylinder hex, external hex groups are the lowest initial tightening rate(p<0.05). 2. Cone screw groups are the highest after repeated loading tightening rate and cylinder hex groups are lowest after repeated loading tightening rate(p<0.05). 3. Cone screw groups have the highest initial stability and final stability. 4. All groups are decreased tightening rate after repeated loading.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Prostheses and Implants
/
Tooth
/
Dental Implants
/
Torque
/
Dentistry
Limits:
Humans
Language:
Korean
Journal:
The Journal of Korean Academy of Prosthodontics
Year:
2004
Type:
Article
Similar
MEDLINE
...
LILACS
LIS