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The dental operative microscope has been widely employed in the field of dentistry, particularly in endodontics and operative dentistry, resulting in significant advancements in the effectiveness of root canal therapy, endodontic surgery, and dental restoration. However, the improper use of this microscope continues to be common in clinical settings, primarily due to operators' insufficient understanding and proficiency in both the features and established operating procedures of this equipment. In October 2019, Professor Jingping Liang, Vice Chairman of the Society of Cariology and Endodontology, Chinese Stomatological Association, organized a consensus meeting with Chinese experts in endodontics and operative dentistry. The objective of this meeting was to establish a standard operation procedure for the dental operative microscope. Subsequently, a consensus was reached and officially issued. Over the span of about four years, the content of this consensus has been further developed and improved through practical experience.
Assuntos
Humanos , Dentística Operatória , Consenso , Endodontia , Tratamento do Canal Radicular , Assistência OdontológicaRESUMO
BACKGROUND: The calcification of the tooth pulp is a pathological condition that occurs in response to various factors. A uncommon haematological condition known as paroxysmal nocturnal haemoglobinuria (PNH) is characterized by bouts of haemolysis, and it requires long-term use of glucocorticoids (GCs). CASE PRESENTATION: A female patient who was diagnosed with PNH and had a history of long-term use of GCs came to our department for root canal therapy (RCT) for teeth 25, 26, and 27. The radiographs showed generalized pulp canal obliteration (PCO) in most of the patients. None of these teeth (25, 26, or 27) were sensitive to percussion, and they did not respond to thermal or electrical sensitivity tests. A diagnose of pulp necrosis was made for these teeth. RCT was carried out with the help of an oral microscope, and then a prosthodontic procedure was created for the teeth. CONCLUSIONS: Based on the patient's long history use of GCs and a series of related studies, we conclude that the long-term usage of GCs contributes significantly to the onset of PCO.
Assuntos
Cavidade Pulpar , Glucocorticoides , Cavidade Pulpar/patologia , Necrose da Polpa Dentária/patologia , Dentição Permanente , Feminino , Glucocorticoides/efeitos adversos , Humanos , Tratamento do Canal Radicular/efeitos adversosRESUMO
Objective:To investigate the relationship between the changes of serum lipoprotein associated phospholipase A2 (Lp-PLA2), human Parkinson′s protein 7 (PARK7), erythropoietin (EPO) and neurological deficit score (NIHSS) and carotid intima-media thickness (CIMT) in patients with acute ischemic stroke (AIS).Methods:150 patients with AIS diagnosed in our hospital from January 2016 to January 2018 (AIS group) and 80 healthy subjects were selected as the control group. The Lp-PLA2, PARK7, EPO levels were compared between the two groups according to NIHSS score (mild, moderate and severe), carotid atherosclerotic plaque (unstable plaque, stable plaque, no plaque).Results:The serum level of Lp-PLA2, PARK7, EPO and CIMT values in the AIS group were significantly higher than those in the control group ( P<0.05). The Lp-PLA2 and PARK7 levels in the mild, moderate and severe AIS patients were gradually increased among the three groups, with statistically significant difference ( P<0.05). There was no significant difference in EPO levels between the different NIHSS groups ( P>0.05); The levels of Lp-PLA2, PARK7 and EPO of AIS patients in non plaque group, stable plaque group and unstable plaque group were gradually increased among the groups, and the difference between the two groups was statistically significant ( P<0.05). The level of Lp-PLA2 and PARK7 in patients with AIS and the NIHSS scores showed a significant positive correlation ( P<0.05). There was a significant positive correlation between Lp-PLA2, PARK7, EPO and CIMT in patients with AIS ( P<0.05). Conclusions:The serum levels of Lp-PLA2, PARK7 and EPO were significantly increased in AIS patients. Lp-PLA2, PARK7 were related to the aggravation of neurological deficits in potential patients. Lp-PLA2, PARK7 and EPO were related to the increase of carotid intima-media thickness in potential patients.
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Objective@#To investigate surface properties of novel flowable composites after polishing and simulated brushing wear, compared to their pasty counterpart.@*Methods@#Composites employed in this study were: three flowable composites (A1: Clearfil Majesty ES Flow; B1: Beautifil Flow Plus F00; C1: Filtek Bulk Fill) and three paste composites (A2: Clearfil Majesty; B2: Beautifil; C2: Filtek Z350. Eleven disk-shaped specimens were made for each material. The specimens were cured, then subjected to sandpaper finishing for 20 s, one-step polishing for 30 s, finally subjected to simulated brushing for 10 000 cycles. Surface roughness and glossiness were measured before finishing, after finishing, after polishing, after 5 000 brushing cycles and after 10 000 brushing cycles, respectively. Data obtained were analyzed using two-way ANOVA method. Scanning electron microscope was employed to examine the microscopic appearance of each material.@*Results@#Surface roughness (0.11~0.22 μm) and glossiness (74.25~86.48 GU) of each material were similar after one-step polishing. After brushing simulation, roughness increased significantly and glossiness decreased significantly for each material (P<0.05). Group A1 presented the best gloss ([50.68±1.58] GU) after final wear (P<0.05). Flowable composites of group A1 and B1 tested in the present setup showed better surface properties compared to their pasty counterpart (group A2 and B2).@*Conclusions@#Within the limit of this study, flowable composites tested in the present research can obtain similar surface polish or even better than the paste composite counterpart.
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Objective: To evaluate effects of color matching of different cavosurface margins on the resin composites in vitro.Methods:Twenty extracted human premolars with an A 2 shade buccal surface were used in this study .Rectangular shaped cavities (3.0 mm depth, 2.0 mm width, 2.0 mm length) were prepared in the center of the buccal surfaces .The gingival and occlusal cavosurface margins were prepared to be either shoulder or bevel;the other cavosurface margins remained vertical .Ten teeth were filled with Clearfil AP-X (AP), the other ten with Clearfil Majesty (MJ) and light cured.The color difference at the cavosurface margin area was measured using a spectrophotometer ( CrystalEye ) and evaluated by 3 observers subjectively .The data were statistically analyzed using repeated measures ANOVA and Chi-square test .Results:When measured by CrystalEye , the color difference between the tooth and resin composite was reduced from the center of restoration to the cavosurface margin area .Both objective and subjective evaluations showed that for AP , the color difference at the cavosurface margin area had no statistical difference among 3 types of the margins; for MJ, the color difference at bevel margin area was significantly smaller than that at the vertical margin area .Conclusion: The resin com-posite restorations produced the color matching at marginal area .The color matching of resin composites with higher diffused light transmission property is more susceptible to the type of cavosurface margins . Preparing bevels may reduce the color difference between the restoration and tooth surface .