Abstract
The aim of this study was to evaluate the primary stability (PS) of titanium implants with a progressive thread design and more thread stability in the apical threads placed in artificial bone materials. A total of 120 implants were placed in commercially available polyurethane composite bone blocks. The angulations that were chosen to place the implants in bone types II and IV were 0, 10, and 20 degrees, respectively. The implant dimensions were 11 mm in length and 3.5 mm in diameter. Two clinicians placed all implants, and an independent examiner evaluated the PS using the Osstell (ISQ) and Periotest devices. The χ test was used to evaluate the statistical differences between the PS at different angulations. This study showed that there was a statistically significant difference (P = 0.02) of the PS values, when measured using the Periotest values, among all 3 angulations in both bone qualities. Tilted implants with 10 degrees, angulation had a better stability than conventionally placed implants. The PS of dental implants is higher for implants placed in type II when compared with type IV artificial bone. A higher stability was found for implants placed with 10-degree angulations.
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