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Copyright of Quintessenz Zahnmedizin is the property of Quintessenz Verlags GmbH 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.)

Copyright of Quintessenz Zahnmedizin is the property of Quintessenz Verlags GmbH 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.)

Copyright of Quintessenz Zahnmedizin is the property of Quintessenz Verlags GmbH 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.)

This article from How It Works magazine provides answers to various questions on a range of topics. It explains that stars have an upper limit of about 150 times the mass of the Sun, although the exact limit is still uncertain. The article also discusses how anti-virus software works, the process of root canals in dentistry, the desiccation of food to make it last longer, the effects of chocolate on animals, the differentiation of stem cells, the vision of dogs compared to humans, the measurement of parsecs in astronomy, the potential for burn-in on plasma TVs, the density of objects, the potential health effects of mobile phones, the formation of ice on rockets during launch, the creation of alcoholic lollies or ice cream, the sensation of "pins and needles," the recycling of vegetable oil into fuel, the difference between melanin and melamine, the construction of samurai swords, and the rare condition of aquagenic urticaria, often referred to as an "allergy to water." [Extracted from the article]

Copyright of Quintessenz Zahnmedizin is the property of Quintessenz Verlags GmbH 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.)

Copyright of Quintessenz Zahnmedizin is the property of Quintessenz Verlags GmbH 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.)

Copyright of Quintessenz Zahnmedizin is the property of Quintessenz Verlags GmbH 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.)

Copyright of Quintessenz Zahnmedizin is the property of Quintessenz Verlags GmbH 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.)

Copyright of Quintessenz Zahnmedizin is the property of Quintessenz Verlags GmbH 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.)

Copyright of Quintessenz Zahnmedizin is the property of Quintessenz Verlags GmbH 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.)

Calcium phosphate cement (CPC) has wide applications in medicine and dentistry, such as dental pulp coating, tooth root canal sealant, bone tissue engineering scaffolds, drug release systems, bone defect restoration, etc. Zinc nanoparticles, on the other hand, have special qualities that cause to provide the initial strength in CPC. The influence of starting temperature and beginning pressure on the thermal behavior (TB) and mechanical behavior (MB) of reinforced CPC was examined in this work using a molecular dynamics (MD) simulation. So, it was investigated how properties like temperature stability, Young's modulus, and ultimate strength changed. The mechanical stability of the simulated structure decreases from 300 K to 400 K at the starting temperature. In actuality, the force of absorption between the simulated structures has reduced as the temperature of the samples has risen. Additionally, the findings demonstrated that the US and YM underwent a downward trend and declined from 1.07 to 0.19 MPa to 0.89 and 0.16 MPa, respectively, when the starting temperature increased from 300 to 400 K. As a result, increasing the initial pressure reduces the inter-atomic distance in the reinforced matrix, and finally, cement particles absorb each other with a greater force. [ABSTRACT FROM AUTHOR]

A recent study conducted at the University of Gothenburg compared the impact of root canal treatment versus tooth extraction on Oral Health-Related Quality of Life (OHRQoL) and patient satisfaction. The study involved 65 patients from general dental clinics in Vastra Gotaland and found few differences in OHRQoL between the two treatment modalities. However, significant improvements were observed in the extraction group in dimensions such as pain, discomfort, and handicap. Overall, patient satisfaction was high for both treatments, with cost being the least satisfactory aspect. [Extracted from the article]

Researchers at the University of Medicine in Bucharest, Romania, have conducted a study comparing the characteristics of six types of dental stem cells derived from the oral cavity. The study analyzed the cells for various markers and their ability to proliferate and differentiate into different lineages. The findings highlight the unique properties of each cell type and their potential applications in future clinical settings. This research contributes to a deeper understanding of oral cavity stem cells and their significance in stem cell research. [Extracted from the article]

A patent application by inventor Nazargi Mahabob has been published online for a cutting tool designed to remove broken endodontic instruments in dental procedures. The tool is an attachment for a low rpm dentist's drill, featuring rectangular cutting teeth made from a flexible, biocompatible material like nickel-titanium alloy. This tool aims to safely remove dentin and pulp surrounding the broken instrument, facilitating its extraction without damaging the tooth or root canal. The patent application highlights the importance of addressing broken endodontic instruments to prevent infection, inflammation, and other dental complications. [Extracted from the article]

A study from Karnataka, India, explores the use of guided endodontics to treat pulp canal obliteration. The research introduces a novel approach using a sleeveless 3D-printed guide to overcome vertical space constraints during drilling. This technique offers a minimally invasive alternative to conventional guided endodontic methods, particularly beneficial in cases of pulp canal obliteration. The study was conducted by researchers from the Department of Conservative Dentistry and Endodontics at Krishnadevaraya College of Dental Sciences and Hospital in Bengaluru, Karnataka, India. [Extracted from the article]

A clinical trial, NCT06630156, conducted by Al-Azhar University, aims to compare the effectiveness of bioceramic root repair material versus Bio MTA in revascularization of immature young permanent teeth. The study evaluates clinical parameters like pain, swelling, and crown discoloration, along with radiographic outcomes such as root lengthening and apical closure. The trial involves 28 participants aged 7-12 years in Egypt and is expected to be completed by December 21, 2024. This research contributes to the advancement of regenerative endodontics and offers insights into innovative treatment approaches for dental health. [Extracted from the article]

A study conducted at Princess Nourah Bint Abdulrahman University in Riyadh, Saudi Arabia, focused on the antimicrobial effect of a new active oxygen fluid (Blue(R) m) as a root canal irrigant against Enterococcus faecalis compared to sodium hypochlorite (NaOCl). The research involved using extracted human teeth contaminated with Enterococcus faecalis and concluded that the active oxygen fluid showed promise as an effective root canal irrigant. The study was published in Oral Health & Preventive Dentistry and was financially supported by Princess Nourah bint Abdulrahman University. [Extracted from the article]

A recent report from Suzhou Ninth People's Hospital discusses the findings of a study on the furcation morphology of permanent mandibular first molars using micro-computed tomography. The researchers collected and scanned 50 extracted molars and reconstructed digital models of the teeth and root canal systems. They measured various anatomical features and classified the furcation types. The study found that the furcation anatomy of the mandibular first molar is complex, and understanding these features is crucial for successful periodontal treatment. The full article can be accessed for free at the BMC Oral Health website. [Extracted from the article]

A research study conducted at the Postgraduate Institute of Medical Education and Research in Chandigarh, India, aimed to analyze the root canal morphology in mandibular incisor teeth in the North Indian subpopulation to improve the outcome of endodontic treatment. The study found that the most prevalent configuration was Type I Vertucci, but other configurations were also present. The researchers concluded that endodontists should carefully explore the morphology of these teeth during root canal treatments. The full study can be accessed for free at the Contemporary Clinical Dentistry website. [Extracted from the article]

A recent study conducted by Ajman University compared the fitting accuracy of custom-made metal posts and cores fabricated using a half-digital and milling technique to that of conventional cast posts fabricated using a direct technique. The study found that the fitting accuracy of cast posts was more accurate than posts fabricated with the half-digital and milling technique. The research used microcomputed tomography to evaluate various variables, including the space volume between the post and root canal, the apical gap volume, and the surface area of space between the post and root canal wall. This study provides valuable insights into the accuracy of different techniques used in dentistry. [Extracted from the article]

A new study conducted by researchers at the College of Dentistry examines the efficacy of SmearOFF and 17% EDTA in removing the smear layer in root canals. The study found that both solutions were effective in removing the smear layer, with no significant differences between them. The researchers also noted that passive ultrasonic irrigation aided in the removal process. This information is available in the International Journal of Biomaterials. [Extracted from the article]

A study conducted at the State Key Laboratory in China examined the ability of different diffusing enhancers to deliver chlorhexidine (CHX) into dentinal tubules for root canal disinfection. The researchers assessed the diffusing properties of five enhancers and found that azone, Triton X-100, and JFC-E exhibited the largest maximum diffusing depths. Azone showed the highest diffusing ability with low cytotoxicity and may be used as a carrier agent for more thorough root canal disinfection. The study was published in the Journal of Dental Sciences. [Extracted from the article]

A recent study conducted by China Agricultural University investigated the bacterial dynamics in the progression of severe early childhood caries (S-ECC) to apical periodontitis in primary teeth of children. The researchers collected tissue samples from different areas of affected teeth and analyzed the bacterial diversity using 16S rRNA gene sequencing. They found that the number of shared bacterial genera increased as the disease advanced, and there was an increase in both the quantity and complexity of bacterial interactions. The study highlights the importance of understanding the relationship between microbial species in disease progression. [Extracted from the article]

A patent application has been submitted for an endodontic tool with a rotating tip, which aims to improve the treatment of dental caries. Dental caries is a common problem, particularly among children, and can have significant impacts on their health and well-being. The current treatment options can be expensive and may involve tooth extraction. The proposed tool utilizes a rotating tip driven by a distal turbine, which aims to prevent instrument breakage and improve the effectiveness of the treatment. This integrated system has the potential to enhance dental care and reduce costs associated with dental caries treatment. [Extracted from the article]

A study conducted by the Department of Conservative Dentistry and Endodontics aimed to evaluate the effect of different endodontic irrigating solutions on the microhardness of root canal dentin. The study found that all tested irrigating solutions decreased dentinal microhardness, with 5% calcium hypochlorite and 0.2% nanochitosan being more detrimental compared to conventional endodontic irrigants. The research suggests that these novel irrigating solutions may negatively impact the microhardness of radicular dentin. The study provides valuable insights for dental professionals and researchers in the field of dentistry. [Extracted from the article]

J. Morita Mfg. Corp. has been issued a patent for a dental treatment apparatus that is designed to cut and enlarge the root canal of a tooth. The apparatus includes a handpiece with a cutting tool, a drive unit for rotating the tool in both cutting and non-cutting directions, an operation button, and a controller. The controller sets the operation button to drive the cutting tool in reverse rotation or twist driving only when certain conditions are met. This invention aims to prevent breakage of the cutting tool and simplify the operation for operators who are not familiar with dental treatment apparatuses. [Extracted from the article]

A recent study conducted by researchers at Mazandaran University of Medical Sciences in Iran aimed to evaluate the obturation quality of three different sealers used in root canal treatment: Endoseal MTA, MTA Fillapex, and Adseal. The study involved 36 human teeth and utilized intraoral digital radiography to assess the presence of voids and gaps in the root canal. The results showed no significant difference in obturation quality among the three sealers, although the Endoseal MTA sealer exhibited more voids. The researchers concluded that while the handling of Endoseal MTA may be difficult, it is still suitable for use in the single cone method of root canal treatment. [Extracted from the article]

A recent study conducted at the University of Airlangga in Surabaya, Indonesia, focused on the challenges of performing endodontic treatment on severely curved root canals. The researchers emphasized the importance of proper planning, instrument selection, and technique to ensure successful treatment. The study presented three cases in which patients with severe toothaches required endodontic treatment. The researchers concluded that with the appropriate knowledge and tools, severely curved root canals can be safely and effectively treated. For more information, the full article can be accessed through the Dental Journal website. [Extracted from the article]

A patent application titled "System, Apparatus, And Method For Automated Medical Laser Operation" has been published online. The application describes a system, method, and apparatus for autonomous laser operation in medical procedures. The method involves performing an imaging scan of a treatment area, generating a scanned model of the area, comparing it to a desired outcome model, and operating a laser on the treatment area based on the difference between the two models. The system includes a laser module, a scanning module, and a controller. The invention aims to provide handheld or intraoral laser systems with the accuracy and precision of computer-aided laser systems. [Extracted from the article]

A recent study conducted at the Medical University of Lodz in Poland aimed to determine the prevalence and correlations between root canal treatment, periapical status, and coronal restoration in the elderly Polish population. The study analyzed 480 cone beam computed tomography (CBCT) images and collected data on various factors such as age, gender, tooth location, restoration quality, and presence of apical periodontitis (AP). The findings revealed that the number of endodontically treated teeth increased with age, and AP was more commonly detected in the maxilla and mandibular molars. The study emphasizes the need for improved endodontic and restorative treatment for the elderly population in Poland and suggests the implementation of CBCT examination for adequate information during endodontic therapy. [Extracted from the article]

A study conducted by researchers from Zhejiang University in Hangzhou, China, investigated the impact of fit and self-etching adhesive (SED) on the retention of fiber posts (FP) in endodontically treated teeth. The study involved 80 lower first premolars that underwent simulated endodontic treatment and were divided into four groups based on the fit of the FP and the presence of SED. The results showed that the group with a fit post and SED demonstrated the strongest pull-out bond strength (BS) and was most suitable for FP-reinforced crown restorations. The study concluded that both fit and SED enhanced the pull-out BS, with SED being critical for BS promotion when mechanical retention was inadequate. [Extracted from the article]

A recent study conducted at Qassim University in Saudi Arabia examined the implementation of rotary root canal instruments in the clinical training of undergraduate dental students. The study found that the majority of dental schools in Saudi Arabia use rotary files in their undergraduate teaching, but only about half of them have specific clinical requirements for rotary root canal instrumentation in their curricula. The ProTaper system was the most commonly used rotary system, and most dental schools had an instructor-to-student ratio of 1:5. The study concluded that while most dental schools have adopted rotary files, some schools need to include more clinical cases treated with rotary instrumentation to ensure better training for students before graduation. [Extracted from the article]

A recent study conducted by researchers at the KSR Institute of Dental Science and Research in Tamil Nadu, India, aimed to analyze the histopathological changes in the pulp of teeth affected by moderate-to-severe periodontitis. The researchers extracted twenty teeth diagnosed with periodontal disease and examined them histopathologically. The findings revealed varying degrees of degeneration in the pulp due to periodontitis, including chronic inflammation, edema, fibrosis, dilated and atrophied blood vessels, and the presence of pulp stones. This study provides valuable insights into the interrelationship between periodontitis and pulpal pathologies. [Extracted from the article]

A recent report from Manipal Academy of Higher Education in Karnataka, India, discusses a case of a 43-year-old man with a rare anatomical configuration in his mandibular canine. The tooth had three canals within a single root that merged to form one, which is a unique occurrence. The patient had previously undergone root canal therapy and was experiencing symptoms of apical periodontitis. Through careful examination and the use of cone-beam computed tomography, a specialized endodontic approach was employed to successfully resolve the patient's symptoms. This research provides valuable insights into the management of complex endodontic cases. [Extracted from the article]

Researchers at Shaheed Zulfiqar Ali Bhutto Medical University in Islamabad, Pakistan, conducted a cross-sectional study using cone-beam computed tomography to analyze the root canal configuration of human permanent anterior teeth in the Pakistani population. The study found that the majority of permanent anterior teeth exhibited a single root, with a small percentage having double roots. Type-I root canals were observed in most of the teeth studied. The research also found that there was no significant association between root canal polymorphism and gender. This study provides valuable insights into the internal root morphological variations of permanent anterior teeth in the Pakistani population. [Extracted from the article]

Li Nathan from Las Vegas, Nevada, has been issued a patent for a method of making absorbent inserts for absorbing fluid in tooth canals. The patent describes an improved absorbent insert made of a compressed absorbent material with fillers dispersed within it to improve rigidity and absorbency. The insert is designed to be inserted into tooth cavities, such as root canals, and expands or swells upon absorbing fluid to more effectively dry the cavity. The method involves compressing a sheet of absorbent material, cutting and shaping it, and using a mold to form the insert. The patent also mentions the possibility of coating or impregnating the insert with a medical agent for additional treatment purposes. [Extracted from the article]

A new report discusses the efficacy of corticosteroids in reducing postoperative pain levels after nonsurgical endodontic treatment. The study aimed to compare and assess the effect of corticosteroids on pain levels and found that using corticosteroids led to a significant decrease in pain levels, particularly at 6 hours after treatment. Prednisolone was found to be particularly effective in reducing pain levels. The research concludes that corticosteroids can greatly reduce postoperative pain following endodontic treatment and dispels misconceptions about their routine use. Further randomized controlled trials are needed to confirm these findings. [Extracted from the article]

A recent study conducted by researchers at the Department of Endodontics aimed to determine the prevalence of the middle mesial canal (MMC) in mandibular first permanent molars in a Persian subpopulation. The study used cone-beam computed tomography (CBCT) to analyze 390 mandibular first molars from 314 CBCT images. The results showed that 8.7% of the teeth contained an MMC, with no significant difference between genders or age groups. However, there was a significant association between the presence of the MMC and an additional distal canal. The study concluded that while the prevalence of the MMC was low, accurate knowledge of root canal morphology is important. [Extracted from the article]

A new report from the Department of Conservative Dentistry and Endodontics in Maharashtra, India, discusses the practice of intentional replantation (IR) in dentistry. The research suggests that IR should not be seen as a last resort treatment, as long-term studies have shown its success rate to be similar to periapical surgery. IR is typically used in cases where retreatment or surgical treatment is not possible and the patient cannot afford implant placement. The report presents a case study of a failed root canal treatment that was successfully treated through IR, resulting in the continued retention of the tooth. [Extracted from the article]

A recent study conducted by researchers at Medical University in Sofia, Bulgaria, compared the effectiveness of two techniques for removing root canal fillings from oval-shaped root canals. The study, which used 12 freshly extracted single-rooted mandibular incisors, found that neither technique resulted in complete removal of the filling material. However, both the high-energy Er:YAG laser and the XP-Endo Finisher R rotary system showed promise for endodontic orthograde retreatment when used under appropriate operating parameters. The study highlights the need for further research in this area. [Extracted from the article]

Researchers from Nankai University in Tianjin, China have developed a new strategy to enhance root canal therapy using a second near-infrared (NIR-II) semiconducting polymer called PIDT-TBT. The polymer, when combined with low-concentration sodium hypochlorite, demonstrated excellent bactericidal effects against three bacterial strains commonly found in root canal infections. Additionally, the researchers found that the polymer and sodium hypochlorite solution could safely dissolve dentin debris and improve the efficiency of root canal preparation. This research provides a potential solution to the challenges of disinfection in root canals and may improve the outcome of root canal treatments. [Extracted from the article]

A patent application from Zumax Medical Co. Ltd. in Suzhou, China, has been released online. The application details an image enhancement system for an operating microscope, specifically designed for dental procedures like root canal therapy. The system consists of a media signal processing apparatus, an image enhancement apparatus, a microscope body, and a binocular tube. By processing information data and converting it into an optical image, the system provides a three-dimensional view of the tooth structure, improving the accuracy and precision of dental procedures. The system also allows for the adjustment of image properties such as size, position, and angle. [Extracted from the article]

A recent study conducted by researchers at Alfaisal University in Riyadh, Saudi Arabia, examined the root canal morphology of maxillary and mandibular incisor teeth in Saudi patients. The study used cone-beam computed tomography (CBCT) to analyze images of 480 patients. The findings revealed that all maxillary teeth had one root with Type I canal configuration, while mandibular teeth also had one root, with the majority having Type I canal configuration in central and lateral incisor teeth. The study also found that tooth length varied by gender and age, with males generally having longer teeth than females. Additionally, mandibular lateral incisor teeth had the highest mean distance from the cementoenamel junction (CEJ) to the point of canal separation and the highest mean width in the area of canal division. [Extracted from the article]

A recent study conducted by researchers at the University of Rome Tor Vergata aimed to understand the bacterial community profiles in primary endodontic infections associated with different periapical indices (PAI) compared to oral mucosa controls. The study included 31 patients with primary apical periodontitis, with 14 having PAI-1 and 17 having PAI-3. The researchers collected microbial specimens from mucosa and endodontic necrotic tissues and analyzed the microbiota composition. The study found that apical periodontitis with higher PAI had a diminished microbial diversity and an increase in bacteria belonging to phyla and genera with an increased anaerobic character. [Extracted from the article]

Researchers from the University of Messina in Italy conducted a study to evaluate the antimicrobial potential of a solution containing 2'-fucosyllactose and lacto-N-neotetraose as an irrigant in root canals infected with E. faecalis. The study involved 32 single-rooted teeth infected with E. faecalis, which were treated with either sodium hypochlorite or the solution of interest. The results showed that the solution did not have a bactericidal effect on E. faecalis in the endodontic system. The researchers concluded that the human milk oligosaccharides used in the study did not effectively eliminate E. faecalis in infected root canals. [Extracted from the article]

A patent has been issued for a dental observation device and method for displaying dental images. The device includes a three-dimensional camera that captures images of the oral cavity, an image-capturing direction detector, a storage unit for storing three-dimensional image information, a display unit that shows the captured image and a corresponding image based on the three-dimensional image information, and an image processor that displays the corresponding image in a predetermined direction. The device allows for the easy recognition of invisible portions of the visible light image and can be used to perform dental treatments more safely and accurately. The patent is assigned to J. Morita Mfg. Corp. [Extracted from the article]

The article presents a study from the Hassan Institute of Medical Sciences investigating how different root canal instrumentation file systems and obturating materials affect the success of pulpectomized teeth in children. Topics discussed include the comparative effectiveness of rotary versus manual file systems, the impact of various obturating materials on treatment outcomes, and the overall clinical success rates of the procedures.

A recent study conducted by researchers from Johannes Gutenberg University Medical Center Mainz examined the internal morphology of maxillary canines (MxC) through a systematic review of existing literature. The study found that the most frequently reported root canal configurations (RCC) of MxC were 1-1-1/1, 2-2-1/1, and 1-2-1/1. The meta-analysis also revealed sex differences in RCC, with males showing a higher prevalence of certain configurations. The researchers concluded that while type 1-1-1/1 RCC is most common, clinicians should be aware of more complex and sex-differentiated patterns to prevent complications in endodontic treatment. The study was published in BMC Oral Health. [Extracted from the article]

Researchers from Universidad Cientifica del Sur conducted a study comparing the effectiveness of two different endodontic activation systems in cleaning mesial canals in lower molars. The study involved preparing the canals with files and irrigating them with sodium hypochlorite and EDTA. The canals were then divided into three groups based on the type of activation used: control, ultrasound irrigation (UI), and passive ultrasonic irrigation (PUI). Scanning electron microscopy was used to evaluate the cleaning efficacy, and the PUI system was found to be the most effective, followed by UI. The efficacy of the activation systems decreased as the working depth increased. [Extracted from the article]