Year: 2025
Type: article
Abstract: The aim of the study was to assess the effect of bulk material on the reliability and failure modes of narrow-diameter implants. Narrow implants (Ø3.5 × 10 mm - 11° internal conical connection) were manufactured from three different bulk materials: commercially pure titanium grade-IV (CP4), cold-worked titanium (CW), and 4Titude (4Ti), and were evaluated under fatigue testing. Eighteen samples per group were tested under step-stress accelerated life testing through 30° off-axis load application in mild, moderate, and aggressive loading profiles. The number of cycles and load at failure were used to calculate use-level probability curves and reliability for missions of 100,000 cycles up to 200 N, followed by fractographic analyses. Beta values suggested that damage accumulation dictated failures. Reliability analyses at 80, 120, and 150 N evidenced high reliability for narrow implants independent of bulk material. At 200 N, a decrease in reliability was observed for all groups (∼46%). Failure mode analysis depicted similar failures for all groups and comprised implant fracture, abutment fracture, and implant + abutment fractures. Narrow implants presented high reliability for physiologic masticatory forces in the anterior region. Characteristic strength, reliability, and failure modes were similar regardless of bulk material, suggesting that fatigue damage accumulation at thin wall implants dictated failure over bulk material strength.
DOI: 10.1111/eos.70021
Language: English
Subfield: Oral Surgery
Field: Dentistry
Domain: Health Sciences
Open Access status: hybrid
Estimated APC paid: $4,220
Awards: G1207375514, G1285114499, G1403634154, G1519896563, G1520163321, G1727187980, G1940038582, G2119065359, G22113365, G2297637712, G255218810, Multi-user equipment approved in grant 21/06730-7: ElectroPuls E3000 All-Electric Dynamic Test Instrument, INSTRON, G2787903550, G29316538, G295657101, G3037806943, G3037898432, G3112110615, G3450274534, G3664779237, G3690646728, G3788413553, Towards sustainable zirconia recycled from milling waste and boosted by glass infiltration for restorative use, and of the development of strong, graded, and aging resistant multilayered zirconia blocks, G4795698086, G4972234609, G5307196572, G5487737996, G5645116680, G5850442571, G5960408532, G6438247056, Multi-user equipment approved in grant 21/06730-7: Macrodurômetro VH1150 - Buehler, G7070284268, G712908436, G7322387805, G75528187, G7650669123, G7673248907, G8668589906, G871200192, G8915798009
OpenAlex ID: W4411194732