Primary Stability of a Hybrid Implant Compared with Tapered and Cylindrical Implants in an Ex Vivo Model

Takeshi Toyoshima, Hideaki Tanaka, Yasunori Ayukawa, Miori Howashi, Tomohiro Masuzaki, Takahiro Kiyosue, Kiyoshi Koyano, Seiji Nakamura

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Background: Hybrid implants are thought to offer good stability and bone-implant contact. Purpose: This study sought to evaluate the primary stability of a hybrid implant compared with tapered and cylindrical implants in an ex vivo model and compare undersized drilling with standard drilling in attaining primary stability. Materials and Methods: Hybrid (Straumann® Bone Level; BL), tapered (Straumann® Tapered Effect; TE), and cylindrical (Straumann® Standard Plus; SP) implants were inserted into 15 mm-thick porcine iliac crest blocks using standard (corticocancellous or cancellous bone) or undersized (cancellous bone only) drilling (n=7). Stability was evaluated using maximum insertion torque (MIT), implant stability quotient (ISQ), and push-out tests. Results: The mean MIT for BL and TE was significantly higher than that for SP (p<0.05). With standard drilling in corticocancellous bone, the mean ISQ for TE was significantly higher than that for SP (p<.05). The mean MIT, ISQ, and push-out test scores for BL, TE, and SP with standard drilling in corticocancellous bone were significantly higher than those with undersized or standard drilling in cancellous bone (p<.05). Conclusions: In this ex vivo model, the hybrid implant demonstrated promising primary stability compared with the cylindrical implant. The improved stability of the hybrid implant was especially evident in cancellous bone. The influence of the cortical layer should be recognized when selecting implants for primary stability.

Original languageEnglish
Pages (from-to)950-956
Number of pages7
JournalClinical implant dentistry and related research
Volume17
Issue number5
DOIs
Publication statusPublished - Oct 2015

All Science Journal Classification (ASJC) codes

  • Oral Surgery
  • Dentistry(all)

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