Structural and torque changes in implant components of different diameters subjected to mechanical fatigue.
Dent Mater
; 40(3): 493-499, 2024 Mar.
Article
in En
| MEDLINE
| ID: mdl-38176998
ABSTRACT
OBJECTIVES:
To evaluate torque maintenance and structural damage in implant components of different diameters subjected to a fatigue challenge.METHODS:
Thirty 10-mm-long, morse taper connection, titanium dental implants and their corresponding one-piece abutments were divided into three groups (n = 10) according to implant diameter 4.3 mm (I4.3), 3.5 mm (I3.5), and 2.9 mm (I2.9). The implants were placed into a load-bearing fixture simulating bone tissue (modified G10), and the abutments were screwed into the implants to a final torque of 20 Ncm for the I4.3 and I3.5 and 15 Ncm for I2.9. The torque was secured by a digital torque meter. Cone-beam computed tomography (CBCT) scans were acquired and post-processed (e-Vol DX software) for all implant/abutment sets before and after subjecting them to fatigue in 37 °C distilled water (2 million cycles, constant load and frequency). The removal torque was measured using the same digital torque meter to calculate the difference in torque before and after fatigue.RESULTS:
I2.9 showed substantial structural deformation compared with the other implant diameters (I3.5 and I4.3). However, the experimental groups did not show statistical differences for abutment loosening.SIGNIFICANCE:
Implants smaller than 3.5 mm in diameter have a higher probability of structural deformation than standard-diameter implants. The association between tomographic scans and e-Vol DX software showed satisfactory consistency with the direct assessment using the digital torque meter, offering an additional tool to evaluate implant component loosening and structural deformations.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Dental Implants
Language:
En
Journal:
Dent Mater
Journal subject:
ODONTOLOGIA
Year:
2024
Document type:
Article
Affiliation country:
Brazil
Country of publication:
United kingdom