Evaluation of the effectiveness of using biodegradable implants based on magnesium oxide compared to titanium alternatives. Experimental study

2021 ◽  
Vol 2 (3(5)) ◽  
pp. 14-19
Author(s):  
D.V. Davydov ◽  
◽  
L.K. Brizhan’ ◽  
A.A. Kerimov ◽  
I.V. Khominets ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Magnesium Oxide ◽  
Growth Zone ◽  
Strength Properties ◽  
Tissue Reaction ◽  
Surrounding Tissue ◽  
Control Group ◽  
Surgical Implants ◽  
Experimental Laboratory ◽  
Young Subjects

The issues of improving surgical implants used in treating patients with traumatological and orthopedic profiles continue to remain relevant. The development of a material not inferior in its elastic-strength properties to metal and that does not require further removal remains a reason for studying new samples that are inert during resorption. The purpose of this study was to experimentally explore and compare the bone tissue reaction to the introduction of titanium and magnesium oxide implants, as well as to study the state of magnesium oxide structures at different times after implantation. The material for the study was an implant based on magnesium oxide manufactured by the «MAGNEZIX» company. We operated on 30 rabbits based on the experimental laboratory of the Main Military Clinical Hospital named after academician N.N. Burdenko Russian Defense Ministry. The main group consisted of 10 rabbits, which were injected with a biodegradable screw made of a material based on magnesium oxide. The control group included 10 rabbits, which were injected with a titanium screw. In addition, another group of rabbits was studied. It included 10 young subjects who were injected with an implant based on magnesium oxide into the growth zone. Subjects were removed from the experiment one at a time at various stages. Then X-ray and histological assessment of the paraimplant zone were performed. As a result, the experiment showed that biomaterials based on magnesium oxide are bioinert, do not cause an inflammation reaction or osteolysis of the surrounding tissue, do not lead to the release of gas and the formation of a pathological cavity. During the introduction of magnesium-containing implants to young subjects, no pathological changes in bone tissue, deformities or stunting in the growth of the studied individuals were detected. Based on the obtained experimental data gathered for 6 months, it should be concluded that the material based on magnesium oxide is very promising and suitable for use in traumatology and orthopedics.

scholarly journals Instrumental and biochemical indicators of the bone tissue state in osteomalacia and osteoporosis

TRAUMA ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 16-20
Author(s):  
A.M. Ignatiev ◽  
N.I. Turchin
Keyword(s):  
Bone Tissue ◽  
Statistical Processing ◽  
Strength Properties ◽  
T Test ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Bone Resorption Marker ◽  
Mineral Density ◽  
Functional Changes ◽  
Group I

Background. A decrease in bone mineral density (BMD), which occurs in osteomalacia (OM) and osteoporosis (OP), is accompanied by a decrease in the strength properties of bone structures and an increase in the risk of fractures. Despite the same clinical outcome (fractures), the morphostructural, etiological, and pathogenetic characteristics of OP and OM differ qualitatively. The purpose of our work was to study the diagnostic criteria for osteomalacia and osteoporosis in postmenopausal women. Materials and methods. We examined 157 postmenopausal (PM) women aged 57.5 ± 1.2 years, of which 103 women were diagnosed with OP (group I) and 24 were morphometrically diagnosed with osteomalacia (group II), control group (III) included 30 apparently healthy women. X-ray densitometry was performed (osteodensitometer Hologic Discovery (USA)). The blood serum level of 25(OH)D was determined by the enzyme immunoassay on a EUROIMMUN analyzer (Germany). Bone resorption marker C-terminal telopeptide of collagen type 1 (CTx), osteocalcin (OC), and parathyroid hormone (PTH) were assessed by the immunochemiluminescent assay, phosphorus level — by spectrophotometric method using a Cobas 6000 analyzer (Roche Diagnostics, Switzerland). The level of osteoprotegerin (OPG) was determined by enzyme-linked immunosorbent assay on an Axsym analyzer (Abbot, Germany). Statistical processing was performed using Microsoft Office Excel and Statistica 10.0 software. Student’s t-test was used for mathematical processing. When assessing the strength of the correlation coefficients, the Chaddock scale was used. Results. The analysis of the data obtained showed a decrease in BMD (p <0.05) in groups I and II. However, BMD neck, T-test neck, Z-test neck in the group of women with OM were significantly reduced (p < 0.05) in comparison with the group with OP. The levels of 25(OH)D, OC, OPG were also reduced (p < 0.05) in the second group of women compared with the first group. We obtained higher (p < 0.05) indices of PTH and CTx in the group of patients with OM in comparison with the group with OP. The correlation analysis of the obtained results showed a relationship between the level of 25(OH)D and indicators of structural and functional changes in BMD: 25(OH)D and CTx (r = –0.669; p = 0.001), 25(OH)D and BMD neck (r = 0.736; p = 0.002). There was also a direct relationship between BMD neck and CTx (r = –0.463; p = 0.002). Conclusions. The PM women with OM, in comparison with the PM women with OP, developed significantly larger (p < 0.05) changes in the structural and functional state of bone tissue, biochemical markers of bone tissue resorption and remodeling, as well as lower (p < 0.05) level of 25(OH)D. The 25(OH)D level is highly informative in terms of predicting and diagnosing a decrease in BMD and the risk of fractures. The biochemical marker of CTx resorption has a high informative value in terms of predicting, timely diagnosis, and the effectiveness of the treatment.

scholarly journals Genes associated with inflammation and bone remodeling are highly expressed in the bone of patients with the early-stage cam-type femoroacetabular impingement

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Guanying Gao ◽  
Ruiqi Wu ◽  
Rongge Liu ◽  
Jianquan Wang ◽  
Yingfang Ao ◽  
...  
Keyword(s):  
Gene Expression ◽  
Bone Tissue ◽  
Bone Remodeling ◽  
Femoroacetabular Impingement ◽  
Early Stage ◽  
Control Group ◽  
Tissue Samples ◽  
Expression Levels ◽  
Normal Bone ◽  
Impingement Zone

Abstract Background Recent studies have shown high expression levels of certain inflammatory, anabolic, and catabolic genes in the articular cartilage from the impingement zone of the hips with femoroacetabular impingement (FAI), representing an increased metabolic state. Nevertheless, little is known about the molecular properties of bone tissue from the impingement zone of hips with FAI. Methods Bone tissue samples from patients with early-stage cam-type FAI were collected during hip arthroscopy for treatment of cam-type FAI. Control bone tissue samples were collected from six patients who underwent total hip replacement because of a femoral neck fracture. Quantitative real-time polymerase chain reaction (PCR) was performed to determine the gene expression associated with inflammation and bone remodeling. The differences in the gene expression in bone tissues from the patients with early-stage cam-type FAI were also evaluated based on clinical parameters. Results In all, 12 patients with early-stage cam-type FAI and six patients in the control group were included in this study. Compared to the control samples, the bone tissue samples from patients with FAI showed higher expression levels of interleukin-6 (IL-6), alkaline phosphatase (ALP), receptor activator of nuclear factor-kB ligand (RANKL), and osteoprotegerin (OPG) (P < 0.05). IL-1 expression was detected only in the control group. On the other hand, there was no significant difference in IL-8 expression between the patients with FAI and the control group. The patients with FAI having a body mass index (BMI) of >24 kg/m2 showed higher ALP expression (P < 0.05). Further, the expression of IL-6 and ALP was higher in the patients with FAI in whom the lateral center-edge angle was >30° (P < 0.05). Conclusions Our results indicated the metabolic condition of bone tissues in patients with early-stage cam-type FAI differed from that of normal bone in the femoral head-neck junction. The expression levels of the genes associated with inflammation and bone remodeling were higher in the bone tissue of patients with early-stage cam-type FAI than in the patients with normal bone tissue.

The Role of Bone Grafts in Preventing Medication-Related Osteonecrosis of the Jaw: Histomorphometric, Immunohistochemical, and Clinical Evaluation in Animal Model

2021 ◽  
pp. 194338752110483
Author(s):  
Jonathan Ribeiro da Silva ◽  
Maria Cristina de Moraes Balbas ◽  
Caroline Águeda Corrêa ◽  
Manuella Zanela ◽  
Roberta Okamoto ◽  
...  
Keyword(s):  
Bone Graft ◽  
Bone Tissue ◽  
Clinical Evaluation ◽  
Tricalcium Phosphate ◽  
Bone Grafts ◽  
Osteonecrosis Of The Jaw ◽  
Control Group ◽  
Bovine Bone ◽  
Beta Tricalcium Phosphate ◽  
Group I

Objective: To evaluate the effects of inorganic bovine bone graft (Lumina Bone, Criteria, Brazil) and beta-tricalcium phosphate (β-TCP) graft (ChronOS, Synthes, Brazil) in rats with the risk of developing post-extraction medication-related osteonecrosis of the jaw (MRONJ). Methods: Eighteen male Wistar rats weighing 350 to 450 g were induced to develop MRONJ using zoledronic acid for 5 weeks. In the sixth week, the right maxillary first molar was extracted. The animals in Group I (G1) did not receive bone grafts after tooth extraction, while Group II (G2) animals received inorganic bovine bone grafts, and Group III (G3) animals received beta-tricalcium phosphate (β-TCP) grafts. Clinical evaluation and histomorphometric and immunohistochemical analyses were performed. ANOVA and Tukey’s statistical tests were used and a level of significance was considered to be 5%. Results: In the clinical evaluation, animals from G2 and G3 did not present clinical manifestations of osteonecrosis, unlike the control group (G1) animals, which presented necrotic bone tissue exposure in all samples. In the histomorphometric evaluation, animals in G3 showed greater formation of bone tissue (66%) and less formation of bone lacuna (18%) than animals in G1 (58%/32%) and in G2 (59%/27%) ( P < 0.05). Moderate (++) immunostaining was observed in G2 and G3 for RANKL, TRAP, and OC, while G1 showed moderate (++) labeling for OC and mild (+) immunostaining for TRAP and RANKL. Conclusions: Greater formation of bone tissue and fewer bone lacunae were found in animals treated with β-TCP. In clinical evaluation, bone graft groups presented with the clinical manifestation of MRONJ and showed higher intensity of immunostaining for TRAP and RANKL. Despite the limitations of experimental animal studies, the results of this work may assist in the development of future clinical research for the prevention of MRONJ.

scholarly journals Differences of Post-Placement Bone Implant Contact (BIC) Value of Dental Implant Coated and Not Coated With Platelet Rich Plasma (PRP)

2017 ◽  
Vol 10 (2) ◽  
pp. 11
Author(s):  
Bahruddin Thalib ◽  
Edy Machmud ◽  
Mochammad Dharmautama ◽  
Ervina Sari Surya ◽  
Asmawati Asmawati ◽  
...  
Keyword(s):  
Dental Implant ◽  
Platelet Rich Plasma ◽  
Control Group ◽  
Bone Implant ◽  
Significant Difference ◽  
Experimental Laboratory ◽  
The Mean ◽  
And Control ◽  
Veterinary Faculty ◽  
Implant Treatment

OBJECTIVE: The success of a dental dental implant treatment focuses on a phenomenon called osseointegration. Evaluation of Bone Area (BA) and Bone-Dental implant Contact (BIC) through histomorphometric analysis is the most widely used parameter to measure osseointegration. The aim of this study was to see post-placement Bone Dental implant Contact (BIC) value of dental implant coated and not coated with PRP.MATERIALS & METHODS: This study was an experimental laboratory conducted at Laboratory of Veterinary Faculty, Hasanuddin University. The sample was baby buck rabbit, aged 4-8 months old, weight 1500–2000 gram, divided into 2 groups each group consist of 12 rabbit, control group not coated with PRP and treatment group coated with PRP. Data analysis using SPSS version 20.0 (SPSS Inc., Chicago, IL, USA).RESULTS: There was a significant difference between the mean BIC values and the 20% increase in BIC values in LP1, LP2 and LP3 between treatment and control group on day 0, 3, 7, and 14.CONCLUSIONS: There was a difference in the average of post-placement BIC value of dental implant coated and not coated with PRP.

scholarly journals Fatty acid is a potential agent for bone tissue induction: In vitro and in vivo approach

2017 ◽  
Vol 242 (18) ◽  
pp. 1765-1771 ◽  
Author(s):  
Guinea BC Cardoso ◽  
Erivelto Chacon ◽  
Priscila GL Chacon ◽  
Pedro Bordeaux-Rego ◽  
Adriana SS Duarte ◽  
...  
Keyword(s):  
Stem Cells ◽  
Oleic Acid ◽  
Fatty Acid ◽  
Bone Tissue ◽  
In Vivo Studies ◽  
Surrounding Tissue ◽  
Bone Induction ◽  
Acid Addition

Our hypothesis was to investigate the fatty acid potential as a bone induction factor. In vitro and in vivo studies were performed to evaluate this approach. Oleic acid was used in a 0.5 wt.% concentration. Polycaprolactone was used as the polymeric matrix by combining solvent-casting and particulate-leaching techniques, with a final porosity of 70 wt.%, investigated by SEM images. Contact angle measurements were produced to investigate the influence of oleic acid on polycaprolactone chains. Cell culture was performed using adipocyte-derived stem cells to evaluate biocompatibility and bioactivity properties. In addition, in vivo studies were performed to evaluate the induction potential of oleic acid addition. Adipocyte-derived stem cells were used to provide differentiation after 21 days of culture. Likewise, information were obtained with in vivo data and cellular invagination was observed on both scaffolds (polycaprolactone and polycaprolactone /oleic acid); interestingly, the scaffold with oleic acid addition demonstrated that cellular migrations are not related to the surrounding tissue, indicating bioactive potential. Our hypothesis is that fatty acid may be used as a potential induction factor for bone tissue engineering. The study’s findings indicate oleic acid as a possible agent for bone induction, according to data on cell differentiation, proliferation, and migration. Impact statement The biomaterial combined in this study on bone regeneration is innovative and shows promising results in the treatment of bone lesions. Polycaprolactone (PCL) and oleic acid have been studied separately. In this research, we combined biomaterials to assess the stimulus and the speed of bone healing.

scholarly journals Uji Sensitisasi Dermal Masker Gel Kombinasi Ekstrak Ampas Daun Teh dan Air Cucian Beras

2019 ◽  
pp. 57-64
Author(s):  
Andi Nurul Annisa ◽  
Wahyu Utaminingrum ◽  
Erza Genatrika
Keyword(s):  
Oryza Sativa L ◽  
Sample Selection ◽  
Challenge Test ◽  
Simple Random Sampling ◽  
Control Group ◽  
Control Group Design ◽  
Experimental Laboratory ◽  
Delayed Hypersensitivity Reaction ◽  
Tea Leaf ◽  
Washing Water

The combination of tea leaf dregs extract and rice washing water as a peel-off gel mask was found to be stable up to 28 days of storage and had an IC50 value 20.4 ppm. This potential can provide an optimal effects as cosmetic ingredients.However, to meet the regulatory requirements of Badan Pengawas Obat Makanan (BPOM) RI and ISO 10993, a dermal sensitization test also need to be done. The aim of this study was to determine the dermal sensitization reaction from peel-off gel mask containing a combination of tea leaf dregsextract (Camellia sinensis L.) and rice washing water (Oryza sativa L.) in test animal. Thisstudy was designed based on experimental laboratory methods and sample selection by simple random sampling. The intervention was given based on posttest-only control group design. The test results for dermal sensitization were determined using the Guinea Pig Maximization Test (GPMT) method. The results showed erythema and edema reactions according to the Magnusson and Kligman scale after administration of peel-off gel masks as samples in the topical tests in test animals, appeared on the 11th day and in the challenge test appeared on the 24th day. This was due to incubation period for one week where the hypersensitivity state can develop, so that this reaction is also called the delayed hypersensitivity reaction

scholarly journals DON-induced changes in bone homeostasis in mink dams

2017 ◽  
Vol 61 (3) ◽  
pp. 357-362 ◽  
Author(s):  
Ewa Tomaszewska ◽  
Piotr Dobrowolski ◽  
Siemowit Muszyński ◽  
Krzysztof Kostro ◽  
Iwona Taszkun ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Bone Mineral ◽  
Wall Thickness ◽  
Vertical Wall ◽  
Control Group ◽  
Bone Homeostasis ◽  
Mineral Density ◽  
Cross Sectional ◽  
Final Body Weight ◽  
Induced Changes

AbstractIntroduction: The aim of the study was to investigate the mechanical and geometric properties as well as bone tissue and mineral density of long bones in mink dams exposed to deoxynivalenol (DON) since one day after mating, throughout gestation (ca. 46 d) and lactation to pelt harvesting. Material and Methods: Thirty clinically healthy multiparous minks (Neovison vison) of the standard dark brown type were used. After the mating, the minks were randomly assigned into two equal groups: nontreated control group and DON group fed wheat contaminated naturally with DON at a concentration of 1.1 mg·kg-1of feed. Results: The final body weight and weight and length of the femur did not differ between the groups. However, DON contamination decreased mechanical endurance of the femur. Furthermore, DON reduced the mean relative wall thickness and vertical wall thickness of the femur, while vertical cortical index, midshaft volume, and cross-sectional moment of inertia increased. Finally, DON contamination did not alter bone tissue density, bone mineral density, or bone mineral content, but decreased the values of all investigated structural and material properties. Conclusion: DON at applied concentration probably intensified the process of endosteal resorption, which was the main reason for bone wall thinning and the weakening of the whole bone.

Mechanical Strength Properties of Injectable Carbonate Apatite Cement with Various Concentration of Sodium Carboxymethyl Cellulose

2017 ◽  
Vol 758 ◽  
pp. 56-60 ◽  
Author(s):  
Arief Cahyanto ◽  
Atina Ghina Imaniyyah ◽  
Myrna Nurlatifah Zakaria ◽  
Zulia Hasratiningsih
Keyword(s):  
Tensile Strength ◽  
Mechanical Strength ◽  
Carboxymethyl Cellulose ◽  
Strength Properties ◽  
Sodium Carboxymethyl Cellulose ◽  
Control Group ◽  
Carbonate Apatite ◽  
Initial Finding ◽  
Polymeric Additives ◽  
Diametral Tensile Strength

Mechanical strength is one of the key factors for clinical application of injectable carbonate apatite (CO3Ap) cement. Incorporation of polymeric additives into the mixing liquid of injectable bone cement has been known to improve cement injectability. The aim of this study is to determine whether incorporation of sodium carboxymethyl cellulose (Na CMC) into the mixing liquid would affect the diametral tensile strength (DTS) of injectable CO3Ap cement. In the present study, Na CMC, a polymeric additive and a cellulose derivative, was used to promote the injectability of CO3Ap cement. Three groups of CO3Ap cement samples consist of CaCO3 and CaHPO4 powder in each group were mixed with 0.5 %, 1%, and 2% Na CMC solution incorporated to 0.2 mol/L Na2HPO4 solution. As a control, powder mixed with 0.2 mol/L Na2HPO4 solution was used. Samples were kept in an incubator (37°C, 100% relative humidity, 24 hours). The mechanical strength properties were evaluated by diametral tensile strength (DTS). The average DTS of samples containing 0.5%, 1%, and 2% Na CMC were 3.19 MPa, 3.57 MPa, and 3.06 MPa, respectively. While the average DTS of the control group was 3.29 MPa. The groups containing Na CMC in all concentrations showed no statistical difference (p>0.05) on DTS compared to the control group. The injectability improved as the concentration of Na CMC increased. In conclusion, revealed that Na CMC does not affect the mechanical strength of CO3Ap cement. Therefore, it may be considered as an effective material to promote cement injectability. Further study of additives that can be used to promote the injectability of CO3Ap cement and enhance the mechanical strength awaits based on this initial finding.

The Effect of Apis mellifera Propolis on RUNX-2 and ALP during Remodeling of Orthodontic Tooth movement

2021 ◽  
pp. 2363-2366
Author(s):  
Budi Handayani ◽  
Mieke Sylvia Margaretha A R ◽  
Rini Devijanti Ridwan ◽  
Mohammed Aljunaid
Keyword(s):  
Apis Mellifera ◽  
Immunohistochemical Staining ◽  
Tooth Movement ◽  
Orthodontic Tooth Movement ◽  
Laboratory Research ◽  
Control Group ◽  
Propolis Extract ◽  
Treatment Groups ◽  
Experimental Laboratory ◽  
Group 2

Herbal medicine is interesting including treatments that use propolis. Propolis collected by Apis mellifera bees has a very useful composition whose active ingredients are flavonoids, CAPE and saponin. This research aims to analyze the effect of Apis mellifera propolis on RUNX-2 and ALP during the remodeling period caused by the orthodontic tooth movement in Cavia cobaya. It constitutes an experimental laboratory study and a random sampling method. The method used experimental laboratory research on 28 Cavia cobaya, which were divided into four groups consisting of two control groups and two treatment groups which have been given 3% and 5% propolis extract respectively. RUNX-2 and ALP expression were evaluated using immunohistochemical staining. Materials and Methods: Propolis is a resin substance produced by bees. Cavia cobaya with orthodontic tooth movement by separator rubber. The control group (Group 1) included clinically healthy Cavia cobaya (n=7), (Group 2) included Cavia cobaya with orthodontic tooth movement (n=7). A treatment group (Group P1) Cavia cobaya have been treated with orthodontic tooth movement and propolis 3%, (Group P2) Cavia cobaya have been treated with orthodontic tooth movement and propolis 5% and observed for 17 days. Samples of maxilla were taken from the subjects for analysis on day 17. RUNX-2 and ALP expression were evaluated using immunohistochemical staining. Results: showed that RUNX-2 and ALP expression were found to increase in the tension side. Conclusion: Propolis extract at 5% concentration had ability in bone remodeling by increasing RUNX-2 and ALP expression in the tension area during orthodontic tooth movement.

scholarly journals Effect of Pistacia atlantica subsp. kurdica Gum in Experimental Periodontitis Induced in Wistar Rats by Utilization of Osteoclastogenic Bone Markers

Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 5819
Author(s):  
Shokhan H. Azeez ◽  
Shanaz M. Gaphor ◽  
Aram M. Sha ◽  
Balkees T. Garib
Keyword(s):  
Wistar Rats ◽  
Bone Markers ◽  
Inflammatory Cells ◽  
Treated Group ◽  
Surrounding Tissue ◽  
Control Group ◽  
Pistacia Atlantica ◽  
Male Wistar Rats ◽  
Experimental Periodontitis ◽  
Serum Rankl

The aim of this study was to assess the effect of local application of essential oil of Pistacia atlantica kurdica (EOK) gel in treatment of experimentally induced periodontitis in rats and its effect on osteoclastogenic bone markers. Twenty-four male Wistar rats of 250 to 350 g were used in this study and were allocated into four groups. Control negative (without induced periodontitis), control positive (induced experimental periodontitis left without treatment), treatment control (induced experimental periodontitis and treated with Chlorhexidine gel) and EOK treated group (induced experimental periodontitis treated with EOK gel). The animals were sacrificed after 30 days, and the mandibular central incisor and surrounding tissue were dissected from the mandible and further processed for preparing H&E slides. Inflammatory cells, osteoclast cells, and periodontal ligament (PDL) were examined and measured histologically. Finally, the mean concentrations of both markers, receptor activator of nuclear factor kappa-Β ligand (RANKL) and (Interleukin-1β) IL-1β, were analyzed by ELISA. A significant reduction of inflammatory reaction and osteoclast numbers with improvement of PDL and low mean concentrations of RANKL and IL-1β were seen in the EOK treated group in comparison to the control group and the chlorhexidine group as well. The extract showed a protective effect in the healing of periodontitis that had been induced in rats and decreased bone resorption by down regulation of serum RANKL and IL-1β markers.

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