Dentin Collagen versus Er:YAG Laser as Surface Biomodifiers for Intact Root Slices Simulating Delayed Replanted Roots.

Objective: To evaluate effects of dentin collagen versus Er:YAG laser application through enhancing human periodontal ligament fibroblast (PDLF) cells to attach to intact root surfaces imitating delayed replanted roots. Background Data: Accidental traumatic injuries with teeth avulsion are managed by replantation. Root resorption, poor conditioning, and non-viable fibroblasts are factors responsible for failure. Methods: Thirty six human healthy single-rooted premolars were collected. Six teeth were used for PDLF, six teeth used for dentin collagen, whereas the remaining 24 teeth (48 root slices) were used for PDLF cell density and morphology. Each root was soaked in 5.25% NaOCl. Three groups (n = 16 slices/each) were planned as follows: I: Control (untreated); II: dentin collagen application; III: Er:YAG laser irradiation (4 mm distance, 40 mJ/pulse, under coolant). Following incubation, cell density and morphology of PDLF were investigated under SEM. Statistical analysis was performed using analysis of variance with Scheffé's test, and p < 0.05 was considered significant. Results: All groups showed increased cultured PDLF following incubation. Regarding cell density, attached PDLFs were significantly lower in untreated controls (36.5 ± 6.36) (p < 0.00001 i.e., <0.05) in negative empty and/or light cellular areas, compared with dentin collagen (65 ± 6) and laser-irradiated (66.75 ± 5.77) groups that did not show significant differences (p = 0.940 i.e., >0.05) and showed intermediate and/or heavy cellular areas. Regarding cell morphology, controls showed round and/or oval appearance with less lamellipodia, whereas dentin collagen and laser groups showed flat morphology with cytoplasmic processes. Conclusions: Both dentin collagen and Er:YAG laser showed comparable effectiveness as biomodification tools with good biocompatibility for human PDLF cell attachment on intact root slices imitating delayed replantation. Dentin collagen as a natural bioactive material is considered an alternative to Er:YAG laser to enhance the regenerative effects.

Untreated Mineralized Dentin Graft Versus Xenograft Around Immediately Placed Dental Implants in the Mandibular Anterior Region: A Randomized Controlled Clinical Trial.

PURPOSE: The structural and compositional similarities between dentin and alveolar bone formed the basis for utilizing dentin for bone regeneration. Various authors recommended using treated mineralized, partially demineralized, and demineralized dentin grafts over xenografts because of their comparable clinical and radiographic results and lower costs. Therefore, the current study aimed at comparing the effect of untreated mineralized dentin grafts (UMDG) versus xenografts in vertical and horizontal augmentation around dental implants that were immediately placed in the mandibular anterior region. MATERIALS AND METHODS: A total of 56 patients who required immediate dental implant placement in the lower anterior region were randomly allocated to group I (study), where ground dentin was washed with normal saline and placed around the dental implants, and to group II (control), where xenograft was used. The primary implant stability was measured at the time of implant placement. Secondary stability, plaque index (PI), bleeding index (BI), probing depth (PD), and keratinized mucosa width (KMW) were assessed at baseline (time of definitive abutment and temporary crown placement) and then at 3, 6, and 12 months. Pain and the number of analgesics consumed were assessed daily during the first postoperative week. Marginal bone loss (MBL) and radiodensity were assessed radiographically. RESULTS: There were no significant differences between both groups in terms of postoperative pain, the number of analgesic tablets consumed, peri-implant mucositis, or peri-implantitis. Both groups showed comparable results for the PI, BI, and BD. Moreover, there was no statistical difference between both groups with regard to primary implant stability and secondary stability at baseline and 12 months. Group I showed significantly lower secondary stability after loading at 3 and 6 months and significantly greater bone loss and lower bone density before exposure. KMW and MBL after exposure were significantly higher in group I at all time points. CONCLUSION: Although UMDG showed similar clinical results as xenografts, including primary and secondary implant stability, they had higher resorption rates than xenografts. Therefore, treatment of the dentin graft is required. Thus, the authors do not recommend using untreated mineralized dentin grafts.

Arthrospira platensis Nanoparticles Mitigate Aging-Related Oxidative Injured Brain Induced by D-galactose in Rats Through Antioxidants, Anti-Inflammatory, and MAPK Pathways.

Background: Loss of normal function is an inevitable effect of aging. Several factors contribute to the aging process, including cellular senescence and oxidative stress. Methods: We investigate how Arthrospira platensis Nanoparticles (NSP) protect against aging injury induced by d-galactose (D-gal) in the rat. So, we subcutaneously (S/C) injected D-gal at 200 mg/kg BW to see if Arthrospira platensis Nanoparticles (NSP) might protect against the oxidative changes generated by D-gal. NSP (0.5 mg/kg body weight once daily by gastric gavage) was given to all groups apart from the control and D-gal groups. The d-gal + NSP group was supplemented with 200 mg of D-gal per kg BW once a day and NSP 0.5 mg/kg BW given orally for 45 days. Biochemical, mRNA expression, and histological investigations of brain tissues were used to evaluate the oxidative alterations caused by d-gal and the protective role of NSP. Results: Our data demonstrated that d-gal was causing significant reductions in relative brain and body weight with increased malondialdehyde (MDA) and redox oxygen species (ROS) levels and increases in serum creatine phosphokinase (CPK) and creatine phosphokinase isoenzyme BB (CPK-BB) with marked decreases in the level of antioxidant enzyme activity in the brain and acetylcholinesterase activity augmented with a phosphorylated H2A histone family member X (γ-H2AX) level increased. The D-gal group had considerably higher phosphorylated p38 mitogen-activated protein kinases (P38MAPK) and C-Jun N-terminal (JNK) kinases. The d-gal administration stimulates the apoptotic gene expression by downregulating the brain superoxide dismutase (SOD), catalase (CAT), and nuclear factor erythroid 2-related factor 2 (Nrf2). The NSP administration saved these parameters in the direction of the control. The brain histopathologic and immunohistochemistry analysis findings support our findings on NSP's protective role. Conclusion: The NSP may be a promising natural protective compound that can prevent aging and preserve health.

Effect Of Corticosteroid And Immune-Suppressive Drugs On Oral Manifestations In Hospitalized COVID-19 Patients.

Objectives: To explore if the oral lesions in coronavirus disease-2019 patients are caused by the drugs used in the treatment or by the virus itself. Method: The cross-sectional study was conducted from September 2020 to September 2021 at the Kafrelsheikh University Hospital, Egypt, and comprised coronavirus disease-2019 patients of either gender aged 20-60 years having severe pneumonia and breathing difficulties who had no comorbidities. Based on the level of interleukin-6 and procalcitonin, the patients were classified into high group I receiving tocilizumab and methylprednisolone, medium group II receiving methylprednisolone alone, and low group III receiving antiviral drugs. The oral manifestations were recorded at the time of admission before treatment and at 2 weeks after the respective treatment. Data was analysed using SPSS 20. RESULTS: Of the 90 patients, 30(33.3%) were in group I; 16(%) males and 14(%) females with mean age 44.82±6.10 years. Group II had 27(%) patients; 14(%) males and 13(%) females with mean age 43.74±4.87 years. Group III had 33(%) patients; 9(%) males and 14(%) females with mean age 42.66±2.51 years (p>0.05). There was no significant difference among the groups at baseline and after 2 weeks of treatment regarding oral manifestations. Intragroup comparison demonstrated a significant difference in the two values in all the three groups (p<0.05). CONCLUSIONS: Oral lesions in coronavirus disease-2019 patients were caused by the virus itself rather than the drugs used in its treatment.

The Effect Of Interleukin-6 And Procalcitonin Level On The Development Of Oral Manifestation In Hospitalized COVID-19 Patients.

Objectives: To evaluate the effect of interleukin-6 and procalcitonin levels in plasma on the development of oral manifestation in patients of coronavirus disease-2019. Method: The case-control study was conducted from January to September 2021 at Kafrelsheikh University Hospital, Egypt, and comprised severe coronavirus disease.One hundred patients of either gender aged 30-60 years were included.. The patients were divided into two equal groups, with group I having patients with oral manifestations, and group II had those without any oral symptoms. Plasma samples from both the groups were used to determine serum interleukin-6 and procalcitonin levels using electrochemiluminescence immunoassay. Data was analysed using SPSS 20. RESULTS: Of the 100 patients, 50(50%) were in each of the two groups. Group I had 29(58%) males and 21(42%) females with overall mean age 44.83±6.12 years. Group II had 26(52%) males and 24(48%) females with overall mean age of 43.68±4.62 years. Interleukin 6 wassignificantly high in group I than in group II (p<0.05), while there was no significant difference between the groups for procalcitonin level (p>0.05). CONCLUSIONS: Interleukin-6 level could play an important role in the development of oral manifestation in coronavirus disease-2019 patients.

Clinical And Radiographic Assessment Of Autogenous Dentin Nanoparticles In Treatment Of Stage Iii Periodontitis: A Split-Mouth Clinical Study.

Objectives: To compare autogenous dentin nanoparticles with allograft bone grafts in the treatment of stage III periodontitis. Method: The randomised study was conducted at the Department of Oral Medicine and Periodontology, Faculty of Oral and Dental Medicine, Kafrelsheikh University Hospital, Egypt, from January 2021 to January 2022, and comprised adult patients of either gender with stage III periodontitis. Each patient's bilateral intrabony defect was randomly treated with an allograft on one side and a graft made of dentin nanoparticles on the testside. Each patient'sremoved tooth was ground into these nanoparticles. Both groups had their probing pocket depth and clinical attachment loss evaluated at baseline and six months aftersurgery. Additionally, digital periapical films were collected in both groups at baseline and six months after therapy to assess vertical bone loss. Data was analysed using SPSS 20. RESULTS: Of the 20 patients, 8(40%) were males and 12(60%) were females with overall mean age 31.00±4.06 years(range: 18-50 years). Of the 40 sites, 20(50%) each were in test and control groups. Compared to baseline values, both groups showed significant improvement in probing pocket depth, clinical attachment loss and vertical bone loss post intervention (p<0.05). There was no significant difference between the postoperative outcomes of the two groups(p>0.05). CONCLUSIONS: Autogenous dentin nanoparticles were found to be an effective and promising biomaterial for bone regeneration in intrabony defects. Clinical Trial: NCT05258006 link: https://clinicaltrials.gov/ct2/show/NCT05258006, Registration date of the Trial 10/2/2022.

The Combination of Tamarindus indica and Coenzyme Q10 can be a Potential Therapy Preference to Attenuate Cadmium-Induced Hepatorenal Injury.

Cadmium (Cd) is a hazardous environmental pollutant that menaces human and animal health and induces serious adverse effects in various organs, particularly the liver and kidneys. Thus, the current study was designed to look into the possible mechanisms behind the ameliorative activities of Tamarindus indica (TM) and coenzyme Q10 (CoQ) combined therapy toward Cd-inflicted tissue injury. Male Wistar rats were categorized into seven groups: Control (received saline only); TM (50 mg/kg); CoQ (40 mg/kg); Cd (2 mg/kg); (Cd + TM); (Cd + CoQ); and (Cd + TM + CoQ). All the treatments were employed once daily via oral gavage for 28 consecutive days. The results revealed that Cd exposure considerably induced liver and kidney damage, evidenced by enhancement of liver and kidney function tests. In addition, Cd intoxication could provoke oxidative stress evidenced by markedly decreased glutathione (GSH) content and catalase (CAT) activity alongside a substantial increase in malondialdehyde (MDA) concentrations in the hepatic and renal tissues. Besides, disrupted protein and lipid metabolism were noticed. Unambiguously, TM or CoQ supplementation alleviated Cd-induced hepatorenal damage, which is most likely attributed to their antioxidant and anti-inflammatory contents. Interestingly, when TM and CoQ were given in combination, a better restoration of Cd-induced liver and kidney damage was noticed than was during their individual treatments.

Antioxidant and Anti-Inflammatory Potential of Thymoquinone and Lycopene Mitigate the Chlorpyrifos-Induced Toxic Neuropathy.

CPF (chlorpyrifos) is an organophosphate pesticide used in agricultural and veterinary applications. Our experiment aimed to explore the effects of thymoquinone (TQ) and/or lycopene (LP) against CPF-induced neurotoxicity. Wistar rats were categorized into seven groups: first group served as a control (corn oil only); second group, TQ (10 mg/kg); third group, LP (10 mg/kg); fourth group, CPF (10 mg/kg) and deemed as CPF toxic control; fifth group, TQ + CPF; sixth group, (LP + CPF); and seventh group, (TQ + LP + CPF). CPF intoxication inhibited acetylcholinesterase (AchE), decreased glutathione (GSH) content, and increased levels of malondialdehyde (MDA), an oxidative stress biomarker. Furthermore, CPF impaired the activity of antioxidant enzymes including superoxide dismutase (SOD) and catalase (CAT) along with enhancement of the level of inflammatory mediators such as tumor necrosis factor-α (TNF-α), interleukin (IL)-6, and IL-1ß. CPF evoked apoptosis in brain tissue. TQ or LP treatment of CPF-intoxicated rats greatly improved AchE activity, oxidative state, inflammatory responses, and cell death. Co-administration of TQ and LP showed better restoration than their sole treatment. In conclusion, TQ or LP supplementation may alleviate CPF-induced neuronal injury, most likely due to TQ or LPs' antioxidant, anti-inflammatory, and anti-apoptotic effects.

Clinical and radiographic diagnostic study of strontium ranelate andmetal-substituted hydroxyapatite bone graft materials in diabetesmellitus with chronic periodontitis.

Background: The present study aimed to assess the clinical and radiographic effect of strontium ranelate and metal-substituted hydroxyapatite as bone graft materials on treating chronic periodontitis among diabetes mellitus patients. Methods: A randomized split-mouth study was conducted on 20 sites in 10 controlled type II diabetic patients suffering from chronic periodontitis. After phase I therapy, the sites were randomly allocated by a computer-generated table into two groups. Group 1: A mucoperiosteal flap was elevated in 10 sites, followed by the placement of strontium ranelate mixed with Gengigel. Group 2: A mucoperiosteal flap was elevated in 10 opposite sites, followed by the placement of metal-substituted hydroxyapatite mixed with Gengigel. Clinical parameters were assessed at baseline and 3- and 6-month intervals. Cone-beam computed tomography (CBCT) was used at baseline and after six months to assess bone gain. Results: The two treatment modalities resulted in a statistically significant reduction in clinical parameters at the 3- and 6-month intervals compared to the mean baseline value. Intergroup comparison showed a significant reduction in probing pocket depth and clinical attachment loss in group 1 compared to group 2. Comparison of the two sides by CBCT showed a significant increase in the alveolar bone height in the SR group than the metal-substituted hydroxyapatite group. Conclusion: Clinical and radiographic results showed a significant improvement in the two groups and provided evidence that strontium ranelate is promising in treating periodontal diseases.

Effect of Omega-3 Fatty Acids on Chronic Periodontitis Patients in Postmenopausal Women: A Randomised Controlled Clinical Study.

PURPOSE: To investigate changes in periodontal parameters and superoxide dismutase activity after root surface debridement with and without omega-3 fatty acid (omega-3 FA) supplementation in postmenopausal women. MATERIALS AND METHODS: Fifty postmenopausal women with chronic periodontitis were divided randomly into two groups. Group 1 (control group, n = 25) patients were provided with periodontal treatment in the form of scaling and root planing (SRP) plus soft gelatinous capsules containing only some olive oil, while group 2 (n = 25) received SRP along with systemic administration of omega-3 FAs in the same soft gelatinous capsules. Clinical parameters and superoxide dismutase (SOD) activity in the gingival crevicular fluid were recorded at baseline, 3 and 6 months after therapy. RESULTS: By the end of the study period, the omega-3-treated group achieved a greater mean probing pocket depth reduction, a mean gain in clinical attachment level especially in deep periodontal pockets, as well as a greater increase in SOD activity (p < 0.01) compared to SRP alone. CONCLUSIONS: Adjunctive omega-3 FAs supplements with SRP reduce periodontal inflammation and improve the status of systemic enzymatic antioxidants in postmenopausal women.

Clinical and radiographic evaluation of nanocrystalline hydroxyapatite with or without platelet-rich fibrin membrane in the treatment of periodontal intrabony defects.

BACKGROUND: Nano-sized ceramics may represent a promising class of bone graft substitutes due to their improved osseointegrative properties. Nanocrystalline hydroxyapatite (NcHA) binds to bone and stimulate bone healing by stimulation of osteoblast activity. Platelet-rich fibrin (PRF), an intimate assembly of cytokines, glycan chains, and structural glycoproteins enmeshed within a slowly polymerized fibrin network, has the potential to accelerate soft and hard tissue healing. The present study aims to explore the clinical and radiographical outcome of NcHA bone graft with or without PRF, in the treatment of intrabony periodontal defects. MATERIALS AND METHODS: In a split-mouth study design, 20 patients having two almost identical intrabony defects with clinical probing depth of at least 6 mm were selected for the study. Selected sites were randomly divided into two groups. In Group I, mucoperiosteal flap elevation followed by the placement of NcHA was done. In Group II, mucoperiosteal flap elevation, followed by the placement of NcHA with PRF was done. Clinical and radiographic parameters were recorded at baseline and at 6-month postoperatively. RESULTS: Both treatment groups showed a significant probing pocket depth (PPD) reduction, clinical attachment gain, increase bone density 6-month after surgery compared with baseline. However, there was a significantly greater PPD reduction and clinical attachment gain when PRF was added to NcHA. CONCLUSION: The NcHA bone graft in combination with PRF demonstrated clinical advantages beyond that achieved by the NcHA alone.

Effect of local application of tea tree (Melaleuca alternifolia) oil gel on long pentraxin level used as an adjunctive treatment of chronic periodontitis: A randomized controlled clinical study.

BACKGROUND: Conventional non-surgical periodontal therapy has been proven to be an effective treatment for patients with chronic periodontitis. Tea tree oil (TTO) can be used as adjunct to conventional periodontal therapy in patient with chronic periodontitis. The aim of this study was to evaluate the effectiveness of adjunctive treatment of TTO on the clinical parameters and the level of pentraxin-3 (PTX3) in chronic periodontitis. MATERIALS AND METHODS: A total of 40 patients with moderate to severe chronic periodontitis were divided into two groups, Group I received scaling and root planing (SRP) only, Group II received SRP and TTO gel. Clinical parameters were recorded and gingival crevicular fluid (GCF) samples were collected from each subject for measuring PTX3 levels at baseline, 1, 3 and 6 months after treatment. RESULTS: In all evaluation periods, there was statistically significant reduction in each of the studied clinical parameters and PTX3 level in Group II as compared with Group I. CONCLUSIONS: The local delivery of TTO gel in case of chronic periodontitis may have some beneficial effects to augment the results of the conventional periodontal therapy. Moreover, it places a focus on the value of monitoring GCF levels of PTX3 as a marker of periodontal tissue healing.