Synchrotron radiation-based micro-computed tomographic analysis of dentinal microcracks using rotary and reciprocating file systems: An in vitro study

Vemisetty, Harikumar; Priya, N Tulasi; Singh, Balwant; Yenubary, Pooja; Agarwal, Ashish; Surakanti, Jayaprada Reddy

doi:10.4103/jcd.jcd_465_20

Cited by 4 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 12 ] Another study documented a greater number of dentinal defects after root resection in teeth with endodontic retreatment (64%), compared to primary root canal treatment (22%). [ 13 ] Anatomical distinctions[ 11 14 ] and strain of the resection have the potential to cause defects in the apical root dentine. [ 13 ]…”

Section: Discussionmentioning

confidence: 99%

Topography of root-end surface after freehand and three-dimensional-guided apicoectomy procedure: A scanning electron microscope study

Damor,

Sharma,

Kumar

et al. 2024

Journal of Conservative Dentistry and Endodontics

View full text Add to dashboard Cite

Background: Dentinal microcracks formed during apical resection may lead to increased susceptibility to root fracture and improper sealing of apical preparation that may negatively influence the outcome of endodontic microsurgery. Aims: This study was performed to analyze the root-end surface for dentinal microcracks using a scanning electron microscope (SEM) after resection with high-speed bur and trephine drill. Materials and Methods: Thirty extracted single-rooted maxillary premolar teeth were selected and randomly distributed into two groups (n = 15). Working length was established using a #15 K-type file. Canals were prepared with a rotary Ni-Ti system to size 30/0.06 using endomotor, irrigated with 3% sodium hypochlorite, dried with paper points, and obturated with gutta-percha cones using a single-cone technique. All samples were mounted on preformed molds and poured using a mixture of sawdust and gypsum. In Group A; tungsten carbide bur was used to perform a freehand apicoectomy. In Group B; a trephine drill was used with a three-dimensional guide to perform 3 mm of root resection. Apicoectomy was performed in both groups under a dental operating microscope. Resected root ends were inspected for microcracks using SEM. The Shapiro–Wilk and Mann–Whitney U-test were used for statistical analysis. Results: Microcracks were observed in all samples in both study groups. Trephine drill produced more microcracks on the resected root surface compared to the use of high-speed tungsten carbide bur with a statistically significant difference (P < 0.05). Conclusions: The trephine drill used during targeted endodontic microsurgery produced more microcracks on the resected root dentine surface compared to the high-speed tungsten carbide bur used during freehand apicoectomy.

show abstract

Section: Discussionmentioning

confidence: 99%

Topography of root-end surface after freehand and three-dimensional-guided apicoectomy procedure: A scanning electron microscope study

Damor,

Sharma,

Kumar

et al. 2024

Journal of Conservative Dentistry and Endodontics

View full text Add to dashboard Cite

show abstract

“…[ 12 ] In addition, microcracks in dried dentin slices can develop spontaneously and be misinterpreted as procedural cracks. [ 27 ] Previous studies reported that the spread of DD continued at the root slices even after 1 month of storage,[ 36 ] although no stress was applied; therefore, the samples were kept moist during all experimental procedures. [ 37 ] It has been proven that the detection of DD is influenced by the moisture content of dentin when evaluated by MCT, but scanning should be performed on dried specimens for better identification of DD since the formation of new DD during dry periods up to 24 h was not confirmed.…”

Section: Discussionmentioning

confidence: 99%

Effects of ultrasonic refinement on endodontic access cavity walls: A microcomputed tomography analysis

et al. 2021

View full text Add to dashboard Cite

Objectives: The present study aimed in assessing the coronal defects after access cavity finishing and refinement by micro. Methods: Access cavities on thirty molars were prepared using a diamond bur. To finish and refine the access cavity, the Endo-Z was used in group 1 (n=15) and Start X 1 in group 2. Preparation time was recorded. A micro-CT scan was done before and after access preparation. Formation and location of the new defects were registered, the extension of defects calculated and the direction of the extension registered, preparation time and surface roughness determined ( P < 0.05). Results: Preparation time was significantly higher with ultrasonics ( P <0.001). Internal walls showed smoother surfaces for Endo-Z group. Newly counts and extension length of defects weren't significantly different between groups ( P > .05). Conclusion: Ultrasonic tips induced new cracks. Both instruments caused the extension of cracks. Ultrasonic tips requires more time and results in significantly rougher surfaces.

show abstract

“…An example of the internal output of this technique can be found in the investigation of chimpanzee and Neanderthal molars using the segmentation and extraction of the 3D structure of rods from the enamel surface to DEJ with a voxel size of 0.678 µm [ 451 ] ( Figure 8 a). This technique has also been used in several other fields of dentistry, to study endodontic post and apical sealers, with the analysis of defects with a pixel size of 5 µm [ 526 ]; to study fluorosis, with the analysis of X-ray absorption coefficient in comparison to a healthy tooth with a voxel size of 12.94 µm [ 484 ]; chemo-mechanical treatments for root canal fillings, with analysis of tissues and debris [ 371 ]; as well as cracks formed after root canal preparation, extraction, and cryopreservation [ 342 , 417 , 456 ]. Similarly, X-ray tomography was also used to investigate post-endodontic restorations, to assess the bonding of composite resin cement, and identified gaps and voids with a pixel size of 650 nm [ 344 , 345 ] ( Figure 8 a), as well as remineralisation [ 314 ].…”

Section: Synchrotron (Circular Particle Accelerator)mentioning

confidence: 99%

Synchrotron X-ray Studies of the Structural and Functional Hierarchies in Mineralised Human Dental Enamel: A State-of-the-Art Review

et al. 2023

View full text Add to dashboard Cite

Hard dental tissues possess a complex hierarchical structure that is particularly evident in enamel, the most mineralised substance in the human body. Its complex and interlinked organisation at the Ångstrom (crystal lattice), nano-, micro-, and macro-scales is the result of evolutionary optimisation for mechanical and functional performance: hardness and stiffness, fracture toughness, thermal, and chemical resistance. Understanding the physical–chemical–structural relationships at each scale requires the application of appropriately sensitive and resolving probes. Synchrotron X-ray techniques offer the possibility to progress significantly beyond the capabilities of conventional laboratory instruments, i.e., X-ray diffractometers, and electron and atomic force microscopes. The last few decades have witnessed the accumulation of results obtained from X-ray scattering (diffraction), spectroscopy (including polarisation analysis), and imaging (including ptychography and tomography). The current article presents a multi-disciplinary review of nearly 40 years of discoveries and advancements, primarily pertaining to the study of enamel and its demineralisation (caries), but also linked to the investigations of other mineralised tissues such as dentine, bone, etc. The modelling approaches informed by these observations are also overviewed. The strategic aim of the present review was to identify and evaluate prospective avenues for analysing dental tissues and developing treatments and prophylaxis for improved dental health.

show abstract

Synchrotron radiation-based micro-computed tomographic analysis of dentinal microcracks using rotary and reciprocating file systems: An in vitro study

Cited by 4 publications

References 22 publications

Topography of root-end surface after freehand and three-dimensional-guided apicoectomy procedure: A scanning electron microscope study

Topography of root-end surface after freehand and three-dimensional-guided apicoectomy procedure: A scanning electron microscope study

Effects of ultrasonic refinement on endodontic access cavity walls: A microcomputed tomography analysis

Synchrotron X-ray Studies of the Structural and Functional Hierarchies in Mineralised Human Dental Enamel: A State-of-the-Art Review

Contact Info

Product

Resources

About