Research regarding bone density assessment using cone beam computed tomography (CBCT) in low bone density regions is sparse. This in vitro study aimed to evaluate the predictability of CBCT for low bone density regions and its correlations with primary implant stability when placing tapered design implants with a stepped osteotomy. Eighteen porcine mandibular condyles were used as simulated low bone density regions. Hounsfield units (HU), obtained via multislice computed tomography, and gray values (GVs), obtained via CBCT, were measured 3 times at 1-month intervals. The maximum implant insertion torque (MIT) and implant stability quotient (ISQ) were recorded as the taper design implants were placed using a stepped osteotomy. Hounsfield units and GV were measured as 335.05–803.07 and 389.98–906.40, respectively. For repeated measurements of HU and GV, the intraclass correlation coefficients were 0.989 and 0.980; the corresponding value for mean HU and GV was 0.768. Bland-Altman plots showed a mean difference between HU and GV of −78.15. Pearson correlation coefficients revealed a strong correlation between HU and GV (r = 0.91, P < .01). The mean ± SD values for MIT and ISQ were 36.44 ± 6.64 Ncm and 80.85 ± 2.03, respectively, but no statistically significant correlations were found with GV and HU. Within the study’s limitations, GV showed similar bone density estimation compared with HU in soft bones. Tapered implant placement with a stepped osteotomy achieved stable primary implant stability in soft bones. However, these in vitro results need to be approved in further clinical studies.
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October 2023
CLINICAL DENTAL IMPLANT SCIENCE RESEARCH|
February 13 2024
Low Bone Density Predictability of CBCT and Its Relation to Primary Stability of Tapered Implant Design: A Pilot Study
Sang-Hoon Lee, DDS, MSD;
Sang-Hoon Lee, DDS, MSD
1Department of Prosthodontics, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
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Pil-Young Yun, DDS, PhD;
Pil-Young Yun, DDS, PhD
2Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
4Department of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea.
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Yang-Jin Yi, DDS, PhD;
Yang-Jin Yi, DDS, PhD
1Department of Prosthodontics, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
4Department of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea.
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Young-Kyun Kim, DDS, PhD;
Young-Kyun Kim, DDS, PhD
2Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
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Hyo-Jung Lee, DDS, PhD;
Hyo-Jung Lee, DDS, PhD
3Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
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Deuk-Won Jo, DDS, PhD
Deuk-Won Jo, DDS, PhD
*
1Department of Prosthodontics, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
*Corresponding author, e-mail: [email protected]
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J Oral Implantol (2023) 49 (5): 556–563.
Citation
Sang-Hoon Lee, Pil-Young Yun, Yang-Jin Yi, Young-Kyun Kim, Hyo-Jung Lee, Deuk-Won Jo; Low Bone Density Predictability of CBCT and Its Relation to Primary Stability of Tapered Implant Design: A Pilot Study. J Oral Implantol 1 October 2023; 49 (5): 556–563. doi: https://doi.org/10.1563/aaid-joi-D-21-00159
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