The Experts below are selected from a list of 63 Experts worldwide ranked by ideXlab platform

Marija Djuric - One of the best experts on this subject based on the ideXlab platform.

  • a microarchitectural assessment of the Gluteal Tuberosity suggests two possible patterns in entheseal changes
    American Journal of Physical Anthropology, 2020
    Co-Authors: Ksenija Djukic, Petar Milovanovic, Petar Milenkovic, Marija Djuric
    Abstract:

    Objectives Macroscopic entheseal forms show two main features: predominant signs of bony formation or resorption. To understand the development of these forms, we investigated microarchitectural differences between the macroscopic proliferative and resorptive forms of the gluteus maximus enthesis. Materials and methods The macromorphological analysis of entheseal changes (EC) was based on the Villotte, visual scoring system for fibrous entheses. Gluteal Tuberosity specimens of different stages of Villote's system were harvested from 16 adult males derived from an archaeological context and scanned using microcomputed tomography. Results The microarchitectural analyzes of cortical bone demonstrated a trend of higher porosity in the resorptive compared to the proliferative phase in Stage B, whereas a 30% porosity reduction was detected in the resorptive compared to proliferative phase of Stage C. In terms of the trabecular bone between the resorptive and proliferative entheseal phases, there was a trend of increased connectivity density, whereas the structural model index decreased in B and increased in C. The assessment of the entire specimen showed an increase in porosity from the proliferative to the resorptive phase in the Stage B, in contrast to a decrease in the Stage C. Discussion The results suggest that from an initial flat entheses, two directions of EC development are possible: (a) a bony prominence may form and, subsequently, it is subjected to trabecularization of the cortical bone inside the prominence, such cortical trabecularization can lead to visible porosity on the cortical external surface; (b) the cortical bone defect may develop with the regular underlying cortical bone.

  • A microarchitectural assessment of the Gluteal Tuberosity suggests two possible patterns in entheseal changes
    American Journal of Physical Anthropology, 2020
    Co-Authors: Ksenija Djukic, Petar Milovanovic, Petar Milenkovic, Marija Djuric
    Abstract:

    OBJECTIVES: Macroscopic entheseal forms show two main features: predominant signs of bony formation or resorption. To understand the development of these forms, we investigated microarchitectural differences between the macroscopic proliferative and resorptive forms of the gluteus maximus enthesis. MATERIALS AND METHODS: The macromorphological analysis of entheseal changes (EC) was based on the Villotte, visual scoring system for fibrous entheses. Gluteal Tuberosity specimens of different stages of Villote's system were harvested from 16 adult males derived from an archaeological context and scanned using microcomputed tomography. RESULTS: The microarchitectural analyzes of cortical bone demonstrated a trend of higher porosity in the resorptive compared to the proliferative phase in Stage B, whereas a 30% porosity reduction was detected in the resorptive compared to proliferative phase of Stage C. In terms of the trabecular bone between the resorptive and proliferative entheseal phases, there was a trend of increased connectivity density, whereas the structural model index decreased in B and increased in C. The assessment of the entire specimen showed an increase in porosity from the proliferative to the resorptive phase in the Stage B, in contrast to a decrease in the Stage C. DISCUSSION: The results suggest that from an initial flat entheses, two directions of EC development are possible: (a) a bony prominence may form and, subsequently, it is subjected to trabecularization of the cortical bone inside the prominence, such cortical trabecularization can lead to visible porosity on the cortical external surface; (b) the cortical bone defect may develop with the regular underlying cortical bone.

Ksenija Djukic - One of the best experts on this subject based on the ideXlab platform.

  • a microarchitectural assessment of the Gluteal Tuberosity suggests two possible patterns in entheseal changes
    American Journal of Physical Anthropology, 2020
    Co-Authors: Ksenija Djukic, Petar Milovanovic, Petar Milenkovic, Marija Djuric
    Abstract:

    Objectives Macroscopic entheseal forms show two main features: predominant signs of bony formation or resorption. To understand the development of these forms, we investigated microarchitectural differences between the macroscopic proliferative and resorptive forms of the gluteus maximus enthesis. Materials and methods The macromorphological analysis of entheseal changes (EC) was based on the Villotte, visual scoring system for fibrous entheses. Gluteal Tuberosity specimens of different stages of Villote's system were harvested from 16 adult males derived from an archaeological context and scanned using microcomputed tomography. Results The microarchitectural analyzes of cortical bone demonstrated a trend of higher porosity in the resorptive compared to the proliferative phase in Stage B, whereas a 30% porosity reduction was detected in the resorptive compared to proliferative phase of Stage C. In terms of the trabecular bone between the resorptive and proliferative entheseal phases, there was a trend of increased connectivity density, whereas the structural model index decreased in B and increased in C. The assessment of the entire specimen showed an increase in porosity from the proliferative to the resorptive phase in the Stage B, in contrast to a decrease in the Stage C. Discussion The results suggest that from an initial flat entheses, two directions of EC development are possible: (a) a bony prominence may form and, subsequently, it is subjected to trabecularization of the cortical bone inside the prominence, such cortical trabecularization can lead to visible porosity on the cortical external surface; (b) the cortical bone defect may develop with the regular underlying cortical bone.

  • A microarchitectural assessment of the Gluteal Tuberosity suggests two possible patterns in entheseal changes
    American Journal of Physical Anthropology, 2020
    Co-Authors: Ksenija Djukic, Petar Milovanovic, Petar Milenkovic, Marija Djuric
    Abstract:

    OBJECTIVES: Macroscopic entheseal forms show two main features: predominant signs of bony formation or resorption. To understand the development of these forms, we investigated microarchitectural differences between the macroscopic proliferative and resorptive forms of the gluteus maximus enthesis. MATERIALS AND METHODS: The macromorphological analysis of entheseal changes (EC) was based on the Villotte, visual scoring system for fibrous entheses. Gluteal Tuberosity specimens of different stages of Villote's system were harvested from 16 adult males derived from an archaeological context and scanned using microcomputed tomography. RESULTS: The microarchitectural analyzes of cortical bone demonstrated a trend of higher porosity in the resorptive compared to the proliferative phase in Stage B, whereas a 30% porosity reduction was detected in the resorptive compared to proliferative phase of Stage C. In terms of the trabecular bone between the resorptive and proliferative entheseal phases, there was a trend of increased connectivity density, whereas the structural model index decreased in B and increased in C. The assessment of the entire specimen showed an increase in porosity from the proliferative to the resorptive phase in the Stage B, in contrast to a decrease in the Stage C. DISCUSSION: The results suggest that from an initial flat entheses, two directions of EC development are possible: (a) a bony prominence may form and, subsequently, it is subjected to trabecularization of the cortical bone inside the prominence, such cortical trabecularization can lead to visible porosity on the cortical external surface; (b) the cortical bone defect may develop with the regular underlying cortical bone.

Petar Milovanovic - One of the best experts on this subject based on the ideXlab platform.

  • a microarchitectural assessment of the Gluteal Tuberosity suggests two possible patterns in entheseal changes
    American Journal of Physical Anthropology, 2020
    Co-Authors: Ksenija Djukic, Petar Milovanovic, Petar Milenkovic, Marija Djuric
    Abstract:

    Objectives Macroscopic entheseal forms show two main features: predominant signs of bony formation or resorption. To understand the development of these forms, we investigated microarchitectural differences between the macroscopic proliferative and resorptive forms of the gluteus maximus enthesis. Materials and methods The macromorphological analysis of entheseal changes (EC) was based on the Villotte, visual scoring system for fibrous entheses. Gluteal Tuberosity specimens of different stages of Villote's system were harvested from 16 adult males derived from an archaeological context and scanned using microcomputed tomography. Results The microarchitectural analyzes of cortical bone demonstrated a trend of higher porosity in the resorptive compared to the proliferative phase in Stage B, whereas a 30% porosity reduction was detected in the resorptive compared to proliferative phase of Stage C. In terms of the trabecular bone between the resorptive and proliferative entheseal phases, there was a trend of increased connectivity density, whereas the structural model index decreased in B and increased in C. The assessment of the entire specimen showed an increase in porosity from the proliferative to the resorptive phase in the Stage B, in contrast to a decrease in the Stage C. Discussion The results suggest that from an initial flat entheses, two directions of EC development are possible: (a) a bony prominence may form and, subsequently, it is subjected to trabecularization of the cortical bone inside the prominence, such cortical trabecularization can lead to visible porosity on the cortical external surface; (b) the cortical bone defect may develop with the regular underlying cortical bone.

  • A microarchitectural assessment of the Gluteal Tuberosity suggests two possible patterns in entheseal changes
    American Journal of Physical Anthropology, 2020
    Co-Authors: Ksenija Djukic, Petar Milovanovic, Petar Milenkovic, Marija Djuric
    Abstract:

    OBJECTIVES: Macroscopic entheseal forms show two main features: predominant signs of bony formation or resorption. To understand the development of these forms, we investigated microarchitectural differences between the macroscopic proliferative and resorptive forms of the gluteus maximus enthesis. MATERIALS AND METHODS: The macromorphological analysis of entheseal changes (EC) was based on the Villotte, visual scoring system for fibrous entheses. Gluteal Tuberosity specimens of different stages of Villote's system were harvested from 16 adult males derived from an archaeological context and scanned using microcomputed tomography. RESULTS: The microarchitectural analyzes of cortical bone demonstrated a trend of higher porosity in the resorptive compared to the proliferative phase in Stage B, whereas a 30% porosity reduction was detected in the resorptive compared to proliferative phase of Stage C. In terms of the trabecular bone between the resorptive and proliferative entheseal phases, there was a trend of increased connectivity density, whereas the structural model index decreased in B and increased in C. The assessment of the entire specimen showed an increase in porosity from the proliferative to the resorptive phase in the Stage B, in contrast to a decrease in the Stage C. DISCUSSION: The results suggest that from an initial flat entheses, two directions of EC development are possible: (a) a bony prominence may form and, subsequently, it is subjected to trabecularization of the cortical bone inside the prominence, such cortical trabecularization can lead to visible porosity on the cortical external surface; (b) the cortical bone defect may develop with the regular underlying cortical bone.

Petar Milenkovic - One of the best experts on this subject based on the ideXlab platform.

  • a microarchitectural assessment of the Gluteal Tuberosity suggests two possible patterns in entheseal changes
    American Journal of Physical Anthropology, 2020
    Co-Authors: Ksenija Djukic, Petar Milovanovic, Petar Milenkovic, Marija Djuric
    Abstract:

    Objectives Macroscopic entheseal forms show two main features: predominant signs of bony formation or resorption. To understand the development of these forms, we investigated microarchitectural differences between the macroscopic proliferative and resorptive forms of the gluteus maximus enthesis. Materials and methods The macromorphological analysis of entheseal changes (EC) was based on the Villotte, visual scoring system for fibrous entheses. Gluteal Tuberosity specimens of different stages of Villote's system were harvested from 16 adult males derived from an archaeological context and scanned using microcomputed tomography. Results The microarchitectural analyzes of cortical bone demonstrated a trend of higher porosity in the resorptive compared to the proliferative phase in Stage B, whereas a 30% porosity reduction was detected in the resorptive compared to proliferative phase of Stage C. In terms of the trabecular bone between the resorptive and proliferative entheseal phases, there was a trend of increased connectivity density, whereas the structural model index decreased in B and increased in C. The assessment of the entire specimen showed an increase in porosity from the proliferative to the resorptive phase in the Stage B, in contrast to a decrease in the Stage C. Discussion The results suggest that from an initial flat entheses, two directions of EC development are possible: (a) a bony prominence may form and, subsequently, it is subjected to trabecularization of the cortical bone inside the prominence, such cortical trabecularization can lead to visible porosity on the cortical external surface; (b) the cortical bone defect may develop with the regular underlying cortical bone.

  • A microarchitectural assessment of the Gluteal Tuberosity suggests two possible patterns in entheseal changes
    American Journal of Physical Anthropology, 2020
    Co-Authors: Ksenija Djukic, Petar Milovanovic, Petar Milenkovic, Marija Djuric
    Abstract:

    OBJECTIVES: Macroscopic entheseal forms show two main features: predominant signs of bony formation or resorption. To understand the development of these forms, we investigated microarchitectural differences between the macroscopic proliferative and resorptive forms of the gluteus maximus enthesis. MATERIALS AND METHODS: The macromorphological analysis of entheseal changes (EC) was based on the Villotte, visual scoring system for fibrous entheses. Gluteal Tuberosity specimens of different stages of Villote's system were harvested from 16 adult males derived from an archaeological context and scanned using microcomputed tomography. RESULTS: The microarchitectural analyzes of cortical bone demonstrated a trend of higher porosity in the resorptive compared to the proliferative phase in Stage B, whereas a 30% porosity reduction was detected in the resorptive compared to proliferative phase of Stage C. In terms of the trabecular bone between the resorptive and proliferative entheseal phases, there was a trend of increased connectivity density, whereas the structural model index decreased in B and increased in C. The assessment of the entire specimen showed an increase in porosity from the proliferative to the resorptive phase in the Stage B, in contrast to a decrease in the Stage C. DISCUSSION: The results suggest that from an initial flat entheses, two directions of EC development are possible: (a) a bony prominence may form and, subsequently, it is subjected to trabecularization of the cortical bone inside the prominence, such cortical trabecularization can lead to visible porosity on the cortical external surface; (b) the cortical bone defect may develop with the regular underlying cortical bone.

Pavel Timonov - One of the best experts on this subject based on the ideXlab platform.

  • Methods for quantitative assessment of femoral antroposcopic landmarks using hand-held laser scanner
    2020
    Co-Authors: Pavel Timonov, Stefan Sivkov, Tsvetanka Petleshkova
    Abstract:

    Purpose : This study is focused on an innovative approach to the numerical assessment of Gluteal Tuberosity through 3D visualization and its use as sex discriminant. Materials and methods : The study was based on an aggregate of 40 right femora, male and female in equal proportion. The surface of tuberositas glutea femoris is captured in a 3D image, using a Hand-held Laser Scanner (FastSCAN). Afterwards, the assessment contains three ways. Firstly, the result is a 3D shape comprising two tetrahedrons with common base. Therefore, the volume of the roughness is approximately equal to the total of the volumes of these two tetrahedrons (volume). Secondly, several points /markers/ are placed on the surface of the roughness of the 3D image. After that we create two-dimensional shape which is a function of the three-dimensional one. The area of the formed shape is measured (area) as well as its greatest elevation (elevation). Thirdly, we assess the position angle of Gluteal Tuberosity (angle C). The results were processed with SPSS 17.0 using Discriminant Function Analysis. Results : If the predictors (volume, area, elevation and angle) are included in the model, than the percentage of cases classified correctly is 95%. Conclusion : This score coincides with world results based on various anthropometric indices of the femur.

  • Sex Estimation from the Upper End of Bulgarian Femur Using 3D Hand-Held Laser Scanner
    Collegium Antropologicum, 2019
    Co-Authors: Pavel Timonov, Antoaneta Fusova
    Abstract:

    Th e present study aimed to establish standards for determining sex from the upper end of the femur in a modern Bulgarian population focused on an innovative approach to the numerical assessment of Gluteal Tuberosity through 3D visualization and its use as a sex predictor. The sample is composed of 1 56 femora . Seven measurements were taken: vertical head diameter, transverse head diameter, maximum head diameter, head circumference, sagittal subtrochanteric diameter, transverse subtrochanteric diameter and supero-inferior neck diameter. The surface of Gluteal Tuberosity was captured in a 3D image, using a hand-held laser scanner. A 3D shape comprising two tetrahedrons with a common base was constructed. The volume of the rough area of muscle insertion was approximately equal to the sum of the area of volumes of these two tetrahedrons (volume). Several points were placed on the surface of the area of roughness o n the 3D image. Based on these points a two-dimensional shape was created which was a function of the three-dimensional one. Thus, volume, area of the newly-formed shape, its greatest elevation and the three angles between the constructed planes were used as sex predictors. The mean values of all metric and 3D measurements showed significant difference s between genders p