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Objectives: With the increased use of 3D‐generated images in biological research, there is a critical need to adapt classical anatomical measurements, traditionally conducted with calipers, to a virtual environment. We present detailed protocols for measuring bicondylar length, a critical dimension of the femur, using three different imaging software programs—3D Slicer™, Amira™, and Simpleware™. These protocols provide researchers and practitioners in radiology, orthopedics, biomechanics, and biological anthropology with accurate and reproducible measurement techniques. The objective is to standardize and support virtual osteology in biomechanical research, stature estimation, and related medical and anthropological studies. Materials and Methods: Adhering to standardized protocols, we adapted femoral bicondylar length measurements for computed tomography images from a New Mexican collection (n = 10). The method was designed for applicability and reproducibility across three software platforms. By comparing measurements from the same sample across different observers and different platforms, this study validates the accuracy and consistency of the adapted protocol, demonstrating its utility for research and clinical assessments. Results: We present a step‐by‐step guide for each program, detailing bone alignment and measurement. We illustrate each step and provide video tutorials via links for an enhanced understanding of the process. Discussion: Bicondylar length can be measured effectively in each software program following the provided instructions. However, ease of measurement varied among the programs, with some offering a more straightforward process. This variability underscores the importance of choosing appropriate software for the user's needs and proficiency. It also suggests areas for improvement and standardization in software design and instructional clarity. Research Highlights: The study introduces a detailed protocol for measuring femoral bicondylar length in 3D bone renderings using three different software programs: 3D Slicer™, Amira™, and Simpleware™.Comprehensive step‐by‐step descriptions, accompanied by illustrative images and video tutorials, are available to researchers to replicate the measurement process easily.Error testing across all three software programs and among different observers on the same software program demonstrated low variability, indicating that this measurement protocol is precise and reliable across all three platforms and with different observers. [ABSTRACT FROM AUTHOR]

Copyright of Sportis: Scientific Journal of School Sport, Physical Education & Psychomotricity is the property of Sportis: Scientific Journal of School Sport, Physical Education & Psychomotricity and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Glycogen synthase kinase (GSK) 3 acts to negatively regulate multiple signaling pathways, including canonical Wnt signaling. The two mammalian GSK3 proteins (alpha and beta) are at least partially redundant. While Gsk3a KO mice are viable and display a metabolic phenotype, abnormal neuronal development, and accelerated aging, Gsk3b KO animals die late in embryogenesis or at birth. Selective Gsk3b KO in bone delays development of some bones, whereas cartilage-specific Gsk3b KO mice are normal except for elevated levels of GSK3A protein. However, the collective role of these two GSK3 proteins in cartilage was not evaluated. To address this, we generated tamoxifen-inducible, cartilage-specific Gsk3a/Gsk3b KO (described as "cDKO") in juvenile mice and investigated their skeletal phenotypes. We found that cartilage-specific Gsk3a/Gsk3b deletion in young, skeletally immature mice causes precocious growth plate (GP) remodeling, culminating in shorter long bones and hence, growth retardation. These mice exhibit inefficient breathing patterns at later stages and fail to survive. The disrupted GP in cDKO mice showed progressive loss of cellular and proteoglycan components, and immunostaining for SOX9, while BGLAP (osteocalcin) and COL2A1 increased. In addition, we observed increased osteoclast recruitment and cell apoptosis. Surprisingly, changes in articular cartilage of cDKO mice were mild compared with the GP, signifying differential regulation of articular cartilage vs GP tissues. Taken together, these findings emphasize a crucial role of two GSK3 proteins in skeletal development, in particular in the maintenance and function of GP. Key Messages: • Both GSK3 genes, together, are crucial regulators of growth plate remodeling. • Cartilage-specific deletion of both GSK3 genes causes skeletal growth retardation. • Deletion of both GSK3 genes decreases Sox9 levels and promotes chondrocyte apoptosis. • Cartilage-specific GSK3 deletion in juvenile mice culminates in premature lethality. • GSK3 deletion exhibits mild effects on articular cartilage compared to growth plate. [ABSTRACT FROM AUTHOR]

Background: Full anatomical stature estimation in forensic and anthropological experts is often limited by unavailability of complete bones after natural or man-made disasters. Objective: This study investigates on morphometry of humerus and estimation of its length from bony segments using univariate and multivariate regression equations in Indian population. Methodology: Total of 401 dry humerus (200 left, 201 right) were taken and analyzed after excluding deformed, incompletely ossified bones. Measurements of replicable humeral bony segments was taken along its longitudinal axis. In addition, dimensions of bicipital groove and supratrochlear foramen (STF) were also recorded. For estimating humeral length, univariate and multivariate regression equations were generated for individual segments and in combination of significant segments respectively. Results: Mean longitudinal length (left side:30.27± 1.691 right side:30.46±1.899), bicipital groove dimensions and presence of STF between right versus left side didn't differ significantly (P>0.05). Presence of STF was higher(36 out of 401 bones), showcased the necessity of expecting its presence during orthopedic, radiological examinations among Indian population. Only few segments were found significantly impacting the humeral length (P>0.05). The multiple regression models were reliable for estimating humeral length (P<0.05), which was evident from close agreement between predicted versus actual values. Conclusion: The regression model developed in the current investigation may could be useful in estimation of stature of skeletal remains in anthropometric, forensic, archaeological investigations. It could also serve in comparative studies on Indian population regarding other humeral parameters. [ABSTRACT FROM AUTHOR]

Background: Eleutherinol is a naphtoquinone derivative that has strong affinity to bind with estrogen alpha receptors (ERα). This compound can be found in Dayak Onion Bulbs (Eleutherine bulbosa Mill.). Objective: The purpose of this study is to analyze the effects of Dayak Onion Bulbs extract on the growth of the bone of hypoestrogen model rat. Methods: A total of 36 female white rats of Sprague-Dawley were divided into 6 groups. All 6 groups receive CMC Na 0,5% (sham group), CMC Na 0,5% (negative group), tamoxifen (positive group), three level of dayak onion bulbs extract doses namely dose 8 mg/200 g, 12 mg/200 g, and 18 mg/200 g. All groups, except the sham, is ovariectomized to obtain the conditions of hypoestrogen. After ovariectomy, all rats were evaluated for the success of ovariectomy on day 35, followed by the administration of the extracts by oral administration for 21 days. After 21 days administration, the level of bone calcium, bone weight, and bone length were measured by Atomic Absorption Spectrophotometry. Results: Dayak onion bulbs extract at dose 3 (18 mg/200 g BW) could increase significantly bone calcium level, bone weight, and bone legnth of hypoestrogen rat. Conclusion: The results showed that Dayak onion bulbs extract could be developed to be a drug for menopause woman in the future. [ABSTRACT FROM AUTHOR]

Copyright of Educação Física em Revista is the property of Educacao Fisica em Revista and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background The purpose of this study was to assess the impact of bone harvest length and multiple osteotomies on osteocutaneous radial forearm free flap (RFFF) complication rates. Methods A retrospective chart review was conducted for patients undergoing osteocutaneous RFFF reconstruction during an 8-year period. Results One hundred fifty-five osteocutaneous RFFF procedures were performed. Recipient-site flap complications were 18 of 55 (32.7%) when bone harvest length was less than 7 cm and 40 of 100 (40.0%) when it was ≥7 cm. No osteotomies were performed in 69 of 155 cases with a corresponding complication rate of 30.4% (21 of 69). One osteotomy was utilized in 69 of 155 flaps, whereas 17 of 155 required more than 1 osteotomy; complications were experienced in 42% (29 of 69) and 47% (8 of 17) of these cases, respectively. Conclusion Osteocutaneous RFFF complication rates were only slightly higher when the bone length was ≥7 cm or when multiple osteotomies were required. © 2015 Wiley Periodicals, Inc. Head Neck 38: 434-438, 2016 [ABSTRACT FROM AUTHOR]

Mechanical stimulation plays a critical role in bone development and growth. In view of recently recognized anabolic responses promoted by a joint-loading modality, we examined the effects of elbow loading on longitudinal growth of the ulna and the humerus. Using a custom-made piezoelectric loader, the left elbow of growing C57/BL/6 female mice was given daily 5-min bouts of dynamic loading for 10 days. The right forelimbs of those mice served as contralateral controls, and the limbs of non-treated mice were used as age-matched controls. The effects of elbow loading were evaluated through measurement of bone length, weight, bone mineral density (BMD), and bone mineral content (BMC), as well as mRNA expression levels of load-sensitive transcription factors such as c-fos, egr1, and atf3. The results revealed that the humerus was elongated by 1.2% compared to the contralateral and age-matched controls (both p < 0.001), while the ulna had become longer than the contralateral control (1.7%; p < 0.05) and the age-match control (3.4%; p < 0.001). Bone lengthening was associated with increases in bone weight, BMD and BMC. Furthermore, the mRNA levels of the selected transcription factors were elevated in the loaded ulna and humerus. Interestingly, the increase was observed not only at the elbow but also at the wrist and shoulder in the loaded limb. The present study demonstrates that joint loading is potentially useful for stimulating bone lengthening and treating limb length discrepancy. [ABSTRACT FROM AUTHOR]

For devising clinical approaches to treating limb length discrepancies, strategies that will generate differential longitudinal growth need to be improved. This report addresses the following question: does knee loading increase bone length of the loaded hindlimb? Knee loading has been shown to induce anabolic responses on the periosteal and endosteal surfaces, but its effects on longitudinal bone growth have not yet been examined. In the present studies, loads were applied to the left hindlimb (5-min bouts at 0.5 N) of C57/BL/6 mice (21 mice, ~8 weeks old). Compared to the contralateral and age-matched control groups, knee loading increased the length of the femur by 2.3 and 3.5%, together with the tibia by 2.3 and 3.7% (all P < 0.001), respectively. In accordance with the length measurements, knee loading elevated BMD and BMC in both the femur and the tibia. Histological analysis of the proximal tibia revealed that the loaded growth plate elevated its height by 19.5% (P < 0.001) and the cross-sectional area by 30.7% (P < 0.05). Particularly in the hypertrophic zone, knee loading increased the number of chondrocytes (P < 0.01) as well as their cellular height (P < 0.001) along the length of the tibia. Taken together, this study demonstrates for the first time the potential effectiveness of knee loading in adjusting limb length discrepancy. [ABSTRACT FROM AUTHOR]