scholarly journals Efficacy and safety of P11-4 for the treatment of periodontal defects in dogs

2022 ◽  
Author(s):  
Claudine Bommer ◽  
Tobias Waller ◽  
Monika Hilbe ◽  
Daniel Wiedemeier ◽  
Nina Meyer ◽  
...  
Keyword(s):  
Clinical Study ◽  
Alveolar Bone ◽  
Study Groups ◽  
Contralateral Side ◽  
Micro Computed Tomography ◽  
Mineral Density ◽  
Safety Issues ◽  
Sham Intervention ◽  
And Performance ◽  
Time Point

Abstract Objectives This study’s aim was to investigate the safety and performance of a self-assembling peptide matrix (SAPM) P11-4 for the treatment of periodontal disease in a controlled pre-clinical study. Materials and methods Acute buccal bony dehiscence defects (LxW: 5 × 3 mm) were surgically created on the distal root of four teeth on one mandible side of 7 beagle dogs followed by another identical surgery 8 weeks later on the contralateral side. SAPM P11-4 (with and without root conditioning with 24% EDTA (T1, T2)), Emdogain® (C) and a sham intervention (S) were randomly applied on the four defects at each time point. Four weeks after the second surgery and treatment, the animals were sacrificed, the mandibles measured by micro-computed tomography (µ-CT) and sections of the tissue were stained and evaluated histologically. Results Clinically and histologically, no safety concerns or pathological issues due to the treatments were observed in any of the study groups at any time point. All groups showed overall similar results after 4 and 12 weeks of healing regarding new cementum, functionality of newly formed periodontal ligament and recovery of height and volume of the new alveolar bone and mineral density. Conclusion A controlled clinical study in humans should be performed in a next step as no adverse effects or safety issues, which might affect clinical usage of the product, were observed. Clinical relevance The synthetic SAPM P11-4 may offer an alternative to the animal-derived product Emdogain® in the future.

Effects of Active Vitamin D or FGF23 Antibody on Hyp Mice Dentoalveolar Tissues

2021 ◽  
pp. 002203452110110
Author(s):  
E.J. Lira dos Santos ◽  
M.B. Chavez ◽  
M.H. Tan ◽  
F.F. Mohamed ◽  
T.N. Kolli ◽  
...  
Keyword(s):  
Alveolar Bone ◽  
Volume Fraction ◽  
Fibroblast Growth Factor 23 ◽  
Neutralizing Antibody ◽  
Micro Computed Tomography ◽  
Mineral Density ◽  
Bone Volume Fraction ◽  
Treatment Regimens ◽  
New Therapeutic Approaches ◽  
Phex Gene

Mutations in the PHEX gene lead to X-linked hypophosphatemia (XLH), a form of inherited rickets featuring elevated fibroblast growth factor 23 (FGF23), reduced 1,25-dihydroxyvitamin D (1,25D), and hypophosphatemia. Hyp mutant mice replicate the XLH phenotype, including dentin, alveolar bone, and cementum defects. We aimed to compare effects of 1,25D versus FGF23-neutralizing antibody (FGF23Ab) monotherapies on Hyp mouse dentoalveolar mineralization. Male Hyp mice, either injected subcutaneously with daily 1,25D or thrice weekly with FGF23 blocking antibody from 2 to 35 d postnatal, were compared to wild-type (WT) controls and untreated Hyp mice. Mandibles were analyzed by high-resolution micro–computed tomography (micro-CT), histology, and immunohistochemistry. Both interventions maintained normocalcemia, increased serum phosphate levels, and improved dentoalveolar mineralization in treated versus untreated Hyp mice. 1,25D increased crown dentin volume and thickness and root dentin/cementum volume, whereas FGF23Ab effects were limited to crown dentin volume. 1,25D increased bone volume fraction, bone mineral density, and tissue mineral density in Hyp mice, whereas FGF23Ab failed to significantly affect these alveolar bone parameters. Neither treatment fully attenuated dentin and bone defects to WT levels, and pulp volumes remained elevated regardless of treatment. Both treatments reduced predentin thickness and improved periodontal ligament organization, while 1,25D promoted a more profound improvement in acellular cementum thickness. Altered cell densities and lacunocanalicular properties of alveolar and mandibular bone osteocytes and cementocytes in Hyp mice were partially corrected by either treatment. Neither treatment normalized the altered distributions of bone sialoprotein and osteopontin in Hyp mouse alveolar bone. Moderate improvements from both 1,25D and FGF23Ab treatment regimens support further studies and collection of oral health data from subjects receiving a newly approved anti-FGF23 therapy. The inability of either treatment to fully correct Hyp mouse dentin and bone prompts further experiments into underlying pathological mechanisms to identify new therapeutic approaches.

scholarly journals Carbonate Apatite Containing Statin Enhances Bone Formation in Healing Incisal Extraction Sockets in Rats

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1201 ◽  
Author(s):  
Yunia Rakhmatia ◽  
Yasunori Ayukawa ◽  
Akihiro Furuhashi ◽  
Kiyoshi Koyano
Keyword(s):  
Bone Formation ◽  
Tooth Extraction ◽  
Alveolar Bone ◽  
Vertical Plane ◽  
Precipitation Reaction ◽  
Carbonate Apatite ◽  
Mixed Solution ◽  
Micro Computed Tomography ◽  
Mineral Density ◽  
Trabecular Thickness

The purpose of this study was to evaluate the feasibility of using apatite blocks fabricated by a dissolution–precipitation reaction of preset gypsum, with or without statin, to enhance bone formation during socket healing after tooth extraction. Preset gypsum blocks were immersed in a Na3PO4 aqueous solution to make hydroxyapatite (HA) low crystalline and HA containing statin (HAFS), or in a mixed solution of Na2HPO4 and NaHCO3 to make carbonate apatite (CO) and CO containing statin (COFS). The right mandibular incisors of four-week-old male Wistar rats were extracted and the sockets were filled with one of the bone substitutes or left untreated as a control (C). The animals were sacrificed at two and four weeks. Areas in the healing socket were evaluated by micro-computed tomography (micro-CT) and histological analyses. The bone volume, trabecular thickness, and trabecular separation were greatest in the COFS group, followed by the CO, HAFS, HA, and C groups. The bone mineral density of the COFS group was greater than that of the other groups when evaluated in the vertical plane. The results of this study suggest that COFS not only allowed, but also promoted, bone healing in the socket. This finding could be applicable for alveolar bone preservation after tooth extraction.

scholarly journals Does Smoking Impair Bone Regeneration in the Dental Alveolar Socket?

2019 ◽  
Vol 105 (6) ◽  
pp. 619-629
Author(s):  
Furqan A. Shah ◽  
Shariel Sayardoust ◽  
Omar Omar ◽  
Peter Thomsen ◽  
Anders Palmquist
Keyword(s):  
Tooth Extraction ◽  
Alveolar Bone ◽  
Volume Ratio ◽  
Bone Microstructure ◽  
Matrix Composition ◽  
Micro Computed Tomography ◽  
Marginal Bone Loss ◽  
Mineral Density ◽  
Heavy Smoking ◽  
Bone Biopsies

Abstract Smoking is a major risk factor for dental implant failure. In addition to higher marginal bone loss around implants, the cellular and molecular responses to injury and implant physicochemical properties are also differentially affected in smokers. The purpose of this work is to determine if smoking impairs bone microstructure and extracellular matrix composition within the dental alveolar socket after tooth extraction. Alveolar bone biopsies obtained from Smokers (> 10 cigarettes per day for at least 10 years) and Ctrl (never-smokers), 7–146 months after tooth extraction, were investigated using X-ray micro-computed tomography, backscattered electron scanning electron microscopy, and Raman spectroscopy. Both Smokers and Ctrl exhibited high inter- and intra-individual heterogeneity in bone microstructure, which varied between dense cortical and porous trabecular architecture. Regions of disorganised/woven bone were more prevalent during early healing. Remodelled lamellar bone was predominant at longer healing periods. Bone mineral density, bone surface-to-volume ratio, mineral crystallinity, the carbonate-to-phosphate ratio, the mineral-to-matrix ratio, the collagen crosslink ratio, and the amounts of amino acids phenylalanine and proline/hydroxyproline were also comparable between Smokers and Ctrl. Bone microstructure and composition within the healing dental alveolar socket are not significantly affected by moderate-to-heavy smoking.

scholarly journals Topical co‐administration of zoledronate with recombinant human bone morphogenetic protein-2 can induce and maintain bone formation in the bone marrow environment

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Hideki Ueyama ◽  
Yoichi Ohta ◽  
Yuuki Imai ◽  
Akinobu Suzuki ◽  
Ryo Sugama ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Bone Formation ◽  
Bone Structure ◽  
Precursor Cells ◽  
The Other ◽  
Bone Morphogenetic Protein 2 ◽  
New Bone Formation ◽  
Micro Computed Tomography ◽  
Mineral Density ◽  
Left Femur

Abstract Background Bone morphogenetic proteins (BMPs) induce osteogenesis in various environments. However, when BMPs are used alone in the bone marrow environment, the maintenance of new bone formation is difficult owing to vigorous bone resorption. This is because BMPs stimulate the differentiation of not only osteoblast precursor cells but also osteoclast precursor cells. The present study aimed to induce and maintain new bone formation using the topical co-administration of recombinant human BMP-2 (rh-BMP-2) and zoledronate (ZOL) on beta-tricalcium phosphate (β-TCP) composite. Methods β-TCP columns were impregnated with both rh-BMP-2 (30 µg) and ZOL (5 µg), rh-BMP-2 alone, or ZOL alone, and implanted into the left femur canal of New Zealand white rabbits (n = 56). The implanted β-TCP columns were harvested and evaluated at 3 and 6 weeks after implantation. These harvested β-TCP columns were evaluated radiologically using plane radiograph, and histologically using haematoxylin/eosin (H&E) and Masson’s trichrome (MT) staining. In addition, micro-computed tomography (CT) was performed for qualitative analysis of bone formation in each group (n = 7). Results Tissue sections stained with H&E and MT dyes revealed that new bone formation inside the β-TCP composite was significantly greater in those impregnated with both rh-BMP-2 and ZOL than in those from the other experimental groups at 3 and 6 weeks after implantations (p < 0.05). Micro-CT data also demonstrated that the bone volume and the bone mineral density inside the β-TCP columns were significantly greater in those impregnated with both rh-BMP-2 and ZOL than in those from the other experimental groups at 3 and 6 weeks after implantations (p < 0.05). Conclusions The topical co-administration of both rh-BMP-2 and ZOL on β-TCP composite promoted and maintained newly formed bone structure in the bone marrow environment.

scholarly journals Comparative Analysis of Periodontal Pain According to the Type of Precision Orthodontic Appliances: Vestibular, Lingual and Aligners. A Prospective Clinical Study

Biology ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 379
Author(s):  
Laura Antonio-Zancajo ◽  
Javier Montero ◽  
Daniele Garcovich ◽  
Mario Alvarado-Lorenzo ◽  
Alberto Albaladejo ◽  
...  
Keyword(s):  
Clinical Study ◽  
Pain Intensity ◽  
Short Form ◽  
Study Groups ◽  
Mcgill Pain Questionnaire ◽  
Prospective Clinical Study ◽  
Orthodontic Appliances ◽  
Low Friction ◽  
Different Types ◽  
Lower Arch

The objective of this prospective clinical study was to analyze the pain (intensity, location and type) that patients presented after the placement of different types of orthodontic appliances: conventional, low friction, lingual and aligners. The sample consisted of 120 patients divided into four groups: conventional (CON), low friction (LF), lingual (LO) and aligners (INV). The participants were given the Short-Form McGill Pain Questionnaire (Ortho-SF-MPQ), where they had to record the pain intensity (no pain, mild, moderate or intense) and the periodontal location at different time points, from the first 4 h to 7 days after the start of treatment. In all the study groups, the most frequent location was both anterior arches, with maximum values between 56.7% (CON group at 24 h) and 30% (LO group at 4 h). The “whole mouth” and “complete lower arch” locations were indicated only by the patients in the lingual group. Regarding pain intensity, the patients reported a higher percentage of mild–moderate pain during the first 3 days of treatment (96.7% in LO at 4 h, 86.7% in CON, 83.3% in LF and 90% in INV at 24 h); later, the reported pain decreased to no pain/mild pain, especially in the lingual group, until reaching values close to zero at 7 days post-treatment. The most frequent type of pain was acute in the low friction and lingual groups (with maxima of 60% and 46.7% at 24 h, respectively). On the contrary, in the conventional (36.7% at 4 h) and Invisalign (40% at 24 h) groups, the sensitive type was the most frequent. There are differences regarding periodontal pain in its intensity, location and type according to the use of different orthodontic techniques.

scholarly journals Alveolar bone heights of maxillary central incisors in unilateral cleft lip and palate patients using cone-beam computed tomography evaluation

2021 ◽  
Author(s):  
Marcin Stasiak ◽  
Anna Wojtaszek-Słomińska ◽  
Bogna Racka-Pilszak
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Alveolar Bone ◽  
Contralateral Side ◽  
Cone Beam ◽  
Rank Test ◽  
Cross Sectional ◽  
Alveolar Bone Grafting

Abstract Purpose The aims of this retrospective cross-sectional study were to measure and compare labial and palatal alveolar bone heights of maxillary central incisors in unilateral cleft lip and palate patients, following STROBE (Strengthening the Reporting of Observational Studies in Epidemiology) guidelines. Patients and methods The study group consisted of 21 patients with a mean age of 16 years. High-resolution cone-beam computed tomography was performed at least one year after secondary alveolar bone grafting. The experimental side was the cleft side and the contralateral side without congenital cleft was the control. Measurements were performed on incisors’ midsagittal cross-sections. The Wilcoxon signed-rank test was used for intergroup comparisons. Results The labial and palatal distances between alveolar bone crests and cementoenamel junctions were significantly greater on the cleft side than on the noncleft side. Mean differences were 0.75 and 1.41 mm, respectively. The prevalence of dehiscences at the cleft side maxillary central incisors was 52% on the labial surface and 43% on the palatal surface. In the controls, it was 19% and 14%, respectively. Conclusion The cleft-adjacent maxillary central incisors had more apically displaced alveolar bone crests on the labial and palatal sides of the roots than the controls. Higher prevalence of dehiscences was found on the cleft side. Bone margin differences predispose to gingival height differences of the central incisors. These differences could increase the demands of patients to obtain more esthetic treatment results with orthodontic extrusion and periodontal intervention on the cleft side.

scholarly journals Heidelberg-mCT-Analyzer: a novel method for standardized microcomputed-tomography-guided evaluation of scaffold properties in bone and tissue research

2015 ◽  
Vol 2 (11) ◽  
pp. 150496 ◽  
Author(s):  
Fabian Westhauser ◽  
Christian Weis ◽  
Melanie Hoellig ◽  
Tyler Swing ◽  
Gerhard Schmidmaier ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Three Dimensional ◽  
Characteristic Parameter ◽  
Micro Computed Tomography ◽  
Mineral Density ◽  
Independent Analysis ◽  
Scaffold Properties

Bone tissue engineering and bone scaffold development represent two challenging fields in orthopaedic research. Micro-computed tomography (mCT) allows non-invasive measurement of these scaffolds’ properties in vivo . However, the lack of standardized mCT analysis protocols and, therefore, the protocols’ user-dependency make interpretation of the reported results difficult. To overcome these issues in scaffold research, we introduce the Heidelberg-mCT-Analyzer. For evaluation of our technique, we built 10 bone-inducing scaffolds, which underwent mCT acquisition before ectopic implantation (T0) in mice, and at explantation eight weeks thereafter (T1). The scaffolds’ three-dimensional reconstructions were automatically segmented using fuzzy clustering with fully automatic level-setting. The scaffold itself and its pores were then evaluated for T0 and T1. Analysing the scaffolds’ characteristic parameter set with our quantification method showed bone formation over time. We were able to demonstrate that our algorithm obtained the same results for basic scaffold parameters (e.g. scaffold volume, pore number and pore volume) as other established analysis methods. Furthermore, our algorithm was able to analyse more complex parameters, such as pore size range, tissue mineral density and scaffold surface. Our imaging and post-processing strategy enables standardized and user-independent analysis of scaffold properties, and therefore is able to improve the quantitative evaluations of scaffold-associated bone tissue-engineering projects.

scholarly journals Sonographic Evaluation of Fractures in Children

2017 ◽  
Vol 33 (3) ◽  
pp. 200-207 ◽  
Author(s):  
Crystal C. Wang ◽  
Kadine L. Linden ◽  
Hansel J. Otero
Keyword(s):  
Tissue Injury ◽  
Soft Tissue Injury ◽  
Contralateral Side ◽  
Cross Sectional ◽  
Nasal Bones ◽  
Fractures In Children ◽  
Common Causes ◽  
Upper And Lower Extremities ◽  
Additional Imaging ◽  
And Performance

Fractures and suspected fractures are common causes for pediatric visits to the emergency department. Initial evaluation routinely includes imaging in the form of radiographs. Additional imaging modalities including sonography and magnetic resonance are used as problem-solving tools. Sonography has been reported to perform well when compared with radiography in multiple anatomies from the skull and nasal bones to the upper and lower extremities. In addition, sonography presents unique advantages including lack of ionizing radiation, cross-sectional coverage, evaluation of soft tissue injury, and the possibility of imaging the contralateral side. This article reviews the applications, advantages, disadvantages, technique, and performance of sonography in the imaging of fractures in children.

A CLINICAL STUDY TO EVALUATE THE EFFECT OF ELEG FEM CAPSULES (ASTHISHRINKHALAADI YOGA) IN THE MANAGEMENT OF OSTEOPOROSIS

2021 ◽  
pp. 62-63
Author(s):  
Neha Thakur ◽  
B.L. Mehra ◽  
Sunil Thakur ◽  
Anil Bhardwaj
Keyword(s):  
Quality Of Life ◽  
Clinical Study ◽  
Osteoporotic Fractures ◽  
Bone Fragility ◽  
Drop Out ◽  
Mineral Density ◽  
Life Index ◽  
T Score ◽  
Quality Of Life Index

Osteoporosis is an alarming issue in the society today. It is continuously increasing its signicance with increasing elderly population and is affecting both the sexes at different degrees. It is characterized by low bone mass with microarchitectural deterioration of bone leading to enhanced bone fragility, thus increasing the susceptibility to fracture. Taking into account the references available in various Ayurvedic classics it can be correlated to Asthikshaya. Asthikshaya occurs due to decrease in strength of Asthi Dhatu chiey due to Kala, Swabhava and Vata Prakopa. International Osteoporosis Foundation estimated that the annual direct cost of treating osteoporotic fractures has increased grossly. In India the general population is not much aware about the hazardous complications of osteoporosis. The modern pharmacological treatment is long and beyond the nancial reach of common people. Therefore the best way to deal with it is to prevent this as early as possible. To achieve this aim a clinical study was conducted to evaluate the effect of an Ayurvedic Formulation known as Eleg Fem capsules (Asthishrinkhalaadi Yoga) in osteoporotic patients. In the clinical trial 30 patients above the age of 40 years with low BMD T-Score were registered from OPD and IPD of Kayachikitsa department of Rajiv Gandhi Govt. Post Graduate Ayurvedic College and Hospital Paprola, Kangra. Out of 30 patients, 27 completed the trial and 3 patients were drop out. Criteria of assessment of patients was change in bone mineral density (BMD T- Score) and change in the score of Quality of Life Index Questionnaire for Osteoporosis (QUALEFFO-41). All the registered patients were given the formulation for 6 weeks. Improvement was observed with statistically signicant results on mean BMD TScore and moderately signicant result on Quality of Life Index scoring. The study revealed that the Eleg Fem capsules (Asthishrinkhalaadi Yoga) is a safe and effective therapy in the Osteoporotic patients.

Sign in / Sign up

Export Citation Format

Share Document