To solve the problem of mechanical instrumentation, we developed a cone-shaped laser irradiation tip. This tip delivers 80% of the energy of the laser laterally and 20% of the energy forward. The tip was equipped with a water nozzle. The aim of this study was to examine the effect of Er:YAG laser irradiation using this tip on root canal enlargement and debridement. As a root canal model, a hole (0.5 x 5 mm) was drilled into a bovine dentin block. The tip was inserted into this hole and moved from the apex to the orifice (45 mm/min). The power of 10 mJ x 10 pps caused enlargement of the canal dimension by 106.5%. 20 and 40 mJ x 10 pps caused enlargements of 116.3 and 118.6%. 30 mJ x 10 pps caused the biggest change (129.8%). Scanning electron microscopic observations indicated that the dentin surface after laser preparation appeared cleaner than that obtained after preparation by drilling. This technique may have the advantage of decreasing the preparation time.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1097/00004770-200008000-00006 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Physalis peruviana calyces extract ameliorate oxidative stress, inflammation, and immune loss in rats-exposed to hexaflumuron.
BMC Complement Med Ther
January 2025
Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr el Aini st, P.B. 11562, Cairo, Egypt.
Background: Hexaflumuron (HFM), a common pesticide, can disrupt the immune system and cause oxidative stress. This study investigated the potential of Physalis peruviana L. calyces extract (PP) to counteract these effects in rats.
View Article and Find Full Text PDFM cells targeted H. pylori antigen SAM-FAdE displayed on bacterium-like particles induce protective immunity.
J Nanobiotechnology
January 2025
School of First Clinical Medical, Ningxia Medical University, Yinchuan, 750004, China.
Background: Helicobacter pylori (H. pylori), a specific bacterium capable of surviving in the acidic environment of the stomach, has been recognized as a group of causative agents of gastric cancer. Therefore, the development of mucosal vaccines against H.
View Article and Find Full Text PDFThe "prostate-pelvic syndrome" theory used in patients with type-III prostatitis and its correlation with prostate volume.
BMC Urol
January 2025
Department of Urology, The First Affiliated Hospital of Anhui Medical University, Anhui Province Key Laboratory of Urological and Andrological Diseases Research and Medical Transformation, Anhui Medical University, Hefei, 230022, China.
Background: Type-III prostatitis is the most common prostate disease in adult males below 40 years old. The actual operation of its diagnosis process is cumbersome. Recently, a group of top Chinese urologists have proposed the theory of "prostate-pelvic syndrome (PPS)" and suggested using it to replace the traditional term for type-III prostatitis.
View Article and Find Full Text PDFA mobile genetic element-derived primase-polymerase harbors multiple activities implicated in DNA replication and repair.
Nucleic Acids Res
January 2025
State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Hubei Hongshan Laboratory, Huazhong Agricultural University, Shizishan Road No.1, Hongshan District, 430070 Wuhan, China.
Primase-polymerases (PrimPols) play divergent functions from DNA replication to DNA repair in all three life domains. In archaea and bacteria, numerous and diverse PPs are encoded by mobile genetic elements (MGEs) and act as the replicases for their MGEs. However, their varying activities and functions are not fully understood.
View Article and Find Full Text PDFAnti-inflammatory effect of sea buckthorn in an HCl-induced cystitis rat model.
Investig Clin Urol
January 2025
Department of Urology, Ewha Womans University College of Medicine, Seoul, Korea.
Purpose: Although the mechanism underlying interstitial cystitis/bladder pain syndrome (IC/BPS) remains unclear, oxidative stress is suggested to be implicated in IC/BPS development. Sea buckthorn (SB; L.) contains several compounds with antioxidant properties.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!