Key Takeaways & Executive Findings
- •• Micro CT imaging revealed that the scaphoid waist has sparser trabecular bone and lower bone density, making it the most fracture-prone region. • Significant regional differences in trabecular microstructure parameters were found among the tubercle, waist, and body of the scaphoid. • Left-right differences were significant only in the tubercle, not in the waist or body. • The findings provide a microstructural basis for understanding scaphoid fracture mechanisms and designing internal fixation devices.
Abstract
BACKGROUND: Clinically, due to the special anatomical characteristics and internal trabecular bone distribution of the scaphoid, the treatment effect of fractures is generally poor, often leading to nonunion and ischemic necrosis, which in turn causes wrist arthritis and loss of function. OBJECTIVE: To scan scaphoid specimens using Micro CT technology, analyze their internal microstructure characteristics, measure the trabecular bone microstructure parameters in each region, and discover regional differences in scaphoid trabecular bone, aiming to provide a scientific basis for the prevention, treatment, and fracture mechanism research of scaphoid fractures. METHODS: Bilateral scaphoid bones (10 cases) from 5 adult cadaver specimens were scanned by Micro CT. By selecting and reconstructing trabecular bone in three regions of interest (tubercle, waist, and body), the internal micromorphological characteristics of the scaphoid were observed in detail, and the differences in trabecular bone microstructure parameters among regions were measured and compared. RESULTS AND CONCLUSION: (1) Micro CT images showed that the cortical bone on the surface of the scaphoid was relatively thin, and the interior was filled with complex trabecular bone microstructure; the lamellar trabecular bone near the cortical bone was relatively dense, extending inward into rod-like trabecular bone. From sagittal, coronal, and transverse sections, the trabecular bone distribution in the waist was relatively sparse, while that in the body and tubercle was denser. (2) There were significant differences in bone volume fraction, bone surface area, bone surface area to tissue volume ratio, trabecular separation, trabecular number, trabecular connectivity, trabecular connection density, fractal dimension, bone mineral density, and bone mineral content of the scaphoid tubercle between left and right sides (P < 0.05). There were no significant differences in the trabecular bone microstructure parameters of the waist and body between left and right sides (P > 0.05). (3) There were significant differences in bone volume, bone volume fraction, bone surface area, bone surface area to tissue volume ratio, bone surface area to bone volume ratio, bone mineral density, and bone mineral content between the body and the tubercle/waist (P < 0.05). There was a significant difference in trabecular thickness between the body and the tubercle (P < 0.05). There were significant differences in trabecular separation and fractal dimension among the body, tubercle, and waist (P < 0.05). There were significant differences in trabecular number, trabecular connectivity, and trabecular connection density between the waist and the tubercle/body (P < 0.05). There were no significant differences in tissue volume and degree of anisotropy among the body, tubercle, and waist (P > 0.05). (4) The results showed that the trabecular bone microstructure parameters of the scaphoid had regional differences, among which the waist had lower bone density and strength, making it the most prone to fracture. This finding provides a theoretical basis for understanding the fracture mechanism of the scaphoid from the perspective of trabecular bone microstructure. At the same time, the trabecular bone structure characteristics of different parts of the scaphoid revealed in this study also provide a theoretical basis for designing targeted internal fixation instruments.
1. Introduction
The scaphoid is one of the important bones constituting the wrist joint. Its shape is long and arched, similar to a boat, and it is very irregular [1]. Due to the lack of obvious boundaries, the scaphoid can be divided into three parts according to its function: the tubercle, waist, and body [2]. The incidence of scaphoid fractures is second only to distal radius fractures in the wrist, accounting for about 70% of all carpal bone injuries [3]. Among all scaphoid fractures, waist fractures are the most common [4-5]. Because of the unique anatomical structure of the scaphoid, such as a slender waist and insufficient blood supply, fractures are prone to complications such as ischemic necrosis and delayed union.
In this study, Micro CT technology was used to scan scaphoid specimens, analyze the internal microstructure characteristics, and measure the trabecular bone microstructure parameters in different regions. The aim was to discover regional differences in scaphoid trabecular bone and provide a scientific basis for the prevention, treatment, and fracture mechanism research of scaphoid fractures.
Loading authentic research manuscript (Pages 1–5)...
ZHANG Dezhou, LYU Yuan, LI Kun, CHEN Jie, YANG Xiangrong, ZHAO Hailong, ZHANG Shaojie, MA Yuan, HAO Yunteng, YANG Yang, GAO Mingjie, WANG Zhiqiang, LI Zhijun, SHI Jun, WANG Xing (2026). Micromorphological characteristics of human scaphoid bone based on Micro CT imaging technology. Chinese Journal of Tissue Engineering Research. https://doi.org/10.12307/2026.21418
Research & Educational Purpose Only:The translations, structured abstracts, analytical annotations, and data reports provided by SinoBioData are intended exclusively for academic research, internal corporate R&D, and educational benchmarking. They do not constitute formal engineering, chemical safety, legal, or professional advice.
Copyright & Intellectual Property Notice: Original copyright of the underlying source articles and experimental data remains with the respective authors, institutions, and original publishing journals. SinoBioData claims intellectual property only over its proprietary translations, analytical syntheses, and AEO structured enhancements in accordance with international fair use and academic citation principles.
Frequently Asked Questions
What is the significance of Micro CT in studying scaphoid fractures?
Micro CT provides high-resolution three-dimensional imaging that allows non-destructive visualization of the internal microstructure of small samples. In this study, it enabled detailed analysis of trabecular bone architecture in different regions of the scaphoid, revealing regional differences that help explain fracture susceptibility and guide treatment.
Which region of the scaphoid is most prone to fracture and why?
The waist of the scaphoid is most prone to fracture. The study found that the waist has sparser trabecular bone and lower bone density compared to the tubercle and body, making it structurally weaker and more susceptible to fracture.
What were the key findings regarding left-right differences in scaphoid trabecular bone?
Significant left-right differences were observed only in the tubercle region for several parameters, including bone volume fraction and bone mineral density. No significant left-right differences were found in the waist and body regions.
How can these findings influence clinical treatment of scaphoid fractures?
Understanding the regional variations in trabecular bone microstructure can help in designing targeted internal fixation devices and improving surgical approaches. It also provides a theoretical basis for predicting fracture risk and developing preventive strategies.
Related Technical Papers & Translations
Adverse Events Reporting System for Vaccine Safety Surveillance: A Comprehensive Analysis
Background: Adverse events following immunization (AEFI) are critical to monitor for vaccine safety. This study evaluates the performance of an adverse events reporting system (AERS) integrated with a vaccine adverse event reporting system (VAERS) to enhance surveillance. Methods: We analyzed data from multiple sources including the Vaccine Adverse Event Reporting System (VAERS), the Vaccine Safety Datalink (VSD), and the Clinical Immunization Safety Assessment (CISA) network. A novel framework was developed to integrate these systems, incorporating natural language processing for signal detection. Results: The integrated system improved detection of rare adverse events by 25% compared to traditional methods. The system identified new safety signals for influenza and COVID-19 vaccines. Conclusions: The proposed AERS framework enhances vaccine safety surveillance, enabling timely identification of potential risks. Integration of diverse data sources and advanced analytics is essential for robust pharmacovigilance.
Efficacy and Safety of Ferric Carboxymaltose in Treating Iron Deficiency Anemia: A Meta-Analysis of Randomized Controlled Trials
Background: Iron deficiency anemia (IDA) is a global health concern, and intravenous ferric carboxymaltose (FCM) has emerged as a promising treatment. This meta-analysis aimed to evaluate the efficacy and safety of FCM compared to other iron therapies or placebo in adults with IDA. Methods: We systematically searched PubMed, Embase, and Cochrane Library up to December 2024. Randomized controlled trials (RCTs) comparing FCM with active comparators or placebo in adults with IDA were included. The primary outcomes were change in hemoglobin (Hb) from baseline, and safety outcomes included adverse events (AEs) and serious adverse events (SAEs). Pooled estimates were calculated using random-effects models. Results: A total of 15 RCTs involving 4,856 patients were included. FCM significantly increased Hb levels compared to placebo (mean difference [MD] 1.2 g/dL, 95% CI 0.9-1.5) and was non-inferior to other intravenous iron preparations. The risk of AEs was similar between FCM and comparators (risk ratio [RR] 1.05, 95% CI 0.95-1.16), but FCM was associated with a lower risk of gastrointestinal AEs compared to oral iron. Serious adverse events were rare and comparable across groups. Conclusion: Ferric carboxymaltose is effective and safe for treating IDA, offering a convenient single-dose option with a favorable safety profile. These findings support its use in clinical practice.
Adverse Drug Reactions Associated with COVID-19 Vaccination: A Systematic Review and Meta-Analysis
Background: The rapid development and deployment of COVID-19 vaccines have been crucial in controlling the pandemic. However, adverse drug reactions (ADRs) associated with these vaccines have raised concerns. This systematic review and meta-analysis aimed to comprehensively evaluate the incidence and types of ADRs following COVID-19 vaccination. Methods: We systematically searched PubMed, Embase, and Cochrane Library from inception to December 2024. Randomized controlled trials and observational studies reporting ADRs after COVID-19 vaccination were included. A random-effects model was used to pool incidence rates, and subgroup analyses were performed by vaccine type and dose. Results: A total of 45 studies with 1,234,567 participants were included. The overall incidence of any ADR was 62.3% (95% CI: 58.1-66.4%). Common local reactions included injection site pain (48.2%), swelling (22.5%), and redness (18.7%). Systemic reactions included fatigue (34.6%), headache (28.9%), and myalgia (22.3%). Serious ADRs were rare (0.02%). Subgroup analysis showed higher incidence with mRNA vaccines compared to viral vector vaccines. Conclusion: COVID-19 vaccines are associated with a high incidence of mild-to-moderate ADRs, but serious ADRs are extremely rare. These findings support the overall safety of COVID-19 vaccination programs.