51. A stepwise under-prepared osteotomy technique improves primary stability in shallow-placed implants: a preliminary study for simultaneous vertical ridge augmentation
- Author
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Daisuke Ueno, Kiyoshi Koyano, H. Tanaka, Takeshi Toyoshima, Toshiro Kodama, Kazuhiko Ueda, Kei Nakamura, and Kousuke Kojima
- Subjects
Insertion torque ,Materials science ,Surface Properties ,medicine.medical_treatment ,Dentistry ,In Vitro Techniques ,Osteotomy ,In vitro model ,Dental Prosthesis Retention ,03 medical and health sciences ,0302 clinical medicine ,0502 economics and business ,medicine ,General Dentistry ,Device Removal ,Reduction (orthopedic surgery) ,Dental Implants ,business.industry ,05 social sciences ,Alveolar Ridge Augmentation ,030206 dentistry ,Initial stability ,Implant stability quotient ,Ridge (differential geometry) ,Dental Prosthesis Design ,Torque ,050211 marketing ,Implant ,business ,Biomedical engineering - Abstract
Simultaneous vertical ridge augmentation (VRA) can reduce treatment procedures and surgery time, but the concomitant reduction in primary stability (PS) of a shallow-placed implant imparts risk to its prognosis. Although several studies have reported improvements in PS, there is little information from any simultaneous VRA model. This study aimed to evaluate whether tapered implants with stepwise under-prepared osteotomy could improve the PS of shallow-placed implants in an in vitro model of simultaneous VRA. Tapered implants (Straumann® Bone Level Tapered implant; BLT) and hybrid implants (Straumann® Bone Level implant; BL) were investigated in this study. A total of 80 osteotomies of different depths (4, 6, 8, 10 mm) were created in rigid polyurethane foam blocks, and each BLT and BL was inserted by either standard (BLT-S, BL-S) or a stepwise under-prepared (BLT-U, BL-U) osteotomy protocol. The PS was evaluated by measuring maximum insertion torque (IT), implant stability quotient (ISQ), and removal torque (RT). The significance level was set at P
- Published
- 2017