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Relationship between the CT Value and Cortical Bone Thickness at Implant Recipient Sites and Primary Implant Stability with Comparison of Different Implant Types
Author(s) -
Howashi Miori,
Tsukiyama Yoshihiro,
Ayukawa Yasunori,
IsodaAkizuki Kei,
Kihara Masafumi,
Imai Yu,
Sogo Motofumi,
Koyano Kiyoshi
Publication year - 2016
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/cid.12261
Subject(s) - implant stability quotient , implant , resonance frequency analysis , medicine , dentistry , orthodontics , osseointegration , surgery
Background Studies have shown that bone quality at the implant recipient site can influence primary stability. Purpose The aims of this study were to explore the quantitative estimation of the primary stability of implants preoperatively using CT values and to examine the effect of different implant designs with recommended socket preparation on primary stability. Materials and Methods Forty‐four fresh porcine femoral heads were prepared. The bone surrounding implant sockets was preoperatively evaluated by helical CT . Forty‐four implants (φ 4.3 × 10 mm), 22 straight and 22 tapered, were placed according to the manufacturer's instructions. The insertion torque value ( ITV ), implant stability quotient ( ISQ ), and removal torque value ( RTV ) were recorded as indicators of primary implant stability. Results Significant correlations and linear relationships were found between the CT value and ITV , ISQ , and RTV for both straight and tapered implants ( S pearman's correlation coefficient, p < .001; linear regression analysis, p < .01). Tapered implants had a significantly higher ITV than straight implants (analysis of covariance, p < .01). Conclusions Obtained results suggest that the primary stability of implants could be quantitatively estimated using the CT value preoperatively, indicating the CT value of bone surrounding an implant can contribute considerably to implant planning and design choice in clinical situations.