scholarly journals Classification and morphology of middle mesial canals of mandibular first molars in a southern Chinese subpopulation: a cone-beam computed tomographic study

2020 ◽  
Author(s):  
Yeqing Yang ◽  
Buling Wu ◽  
Junkai Zeng ◽  
Ming Chen
Keyword(s):  
Incidence Rate ◽  
Root Canal ◽  
Morphological Type ◽  
Cone Beam ◽  
Inclusion Criteria ◽  
Computed Tomographic ◽  
Southern Chinese ◽  
Significant Difference ◽  
Group A ◽  
Group B

Abstract Background: Cone-beam computed tomography (CBCT) was employed to study the morphology and curvature of middle mesial canals (MMCs) of mandibular first molars (MFMs).Methods: CBCT scanning was performed on MFMs of 1100 patients. Patients' images that met the inclusion criteria were divided into group A (<40 years old) and group B (≥40 years old) for further study. The images were used to study the incidence of MMCs at different ages, measure the curvature of MMCs in the mesiodistal and buccolingual directions using the Schneider method, and observe the anatomical morphology of the mesial root canal system.Results: In 875 patients, 1750 MFM images met the inclusion criteria. Among these cases, 158 MFMs contained an MMC, yielding an incidence rate of 9.03%. The incidence rate of MMCs was 11.22% in group A and 6.61% in group B, and this difference was statistically significant (P<0.05). The curvature in the mesiodistal direction was 29.39±8.53º in group A and 26.06±8.50º in group B, and this difference was also significant (P<0.05). The curved regions in groups A and B were often located in the middle 1/3 of canal. No significant difference in the distance between MMC orifices and mesiobuccal canal orifices or mesiolingual canal orifices was noted (P>0.05). The most common mesial root canal morphological type was type II (3-2) (53.80%). Conclusion: The incidence of MMCs in MFMs declined as age increased. The canal systems of MMCs were varied and complex, mainly exhibiting an obvious mesiodistal curve. CBCT is an outstanding method to help guide root canal therapy.

scholarly journals Classification and morphology of middle mesial canals of mandibular first molars in a Southern Chinese subpopulation: a cone-beam computed tomographic study

2020 ◽  
Author(s):  
Yeqing Yang ◽  
Ming Chen ◽  
Junkai Zeng ◽  
Buling Wu
Keyword(s):  
Incidence Rate ◽  
Root Canal ◽  
Morphological Type ◽  
Cone Beam ◽  
Inclusion Criteria ◽  
Computed Tomographic ◽  
Southern Chinese ◽  
Significant Difference ◽  
Group A ◽  
Group B

Abstract Background: Cone-beam computed tomography (CBCT) was employed to study the morphology and curvature of middle mesial canals (MMCs) of mandibular first molars (MFMs).Methods: CBCT scanning was performed on MFMs of 1100 patients. Patients' images that met the inclusion criteria were divided into group A (<40 years old) and group B (≥40 years old) for further study. The images were used to study the incidence of MMCs at different ages, measure the curvature of MMCs in the mesiodistal and buccolingual directions using the Schneider method, and observe the anatomical morphology of the mesial root canal system.Results: In 875 patients, 1750 MFM images met the inclusion criteria. Among these cases, 158 MFMs contained an MMC, yielding an incidence rate of 9.03%. The incidence rate of MMCs was 11.22% in group A and 6.61% in group B, and this difference was statistically significant (P<0.05). The curvature in the mesiodistal direction was 29.39±8.53º in group A and 26.06±8.50º in group B, and this difference was also significant (P<0.05). The curved regions in groups A and B were often located in the middle 1/3 of canal. No significant difference in the distance between MMC orifices and mesiobuccal canal orifices or mesiolingual canal orifices was noted (P>0.05). The most common mesial root canal morphological type was type II (3-2) (53.80%). Conclusion: The incidence of MMCs in MFMs declined as age increased. The canal systems of MMCs were varied and complex, mainly exhibiting an obvious mesiodistal curve. CBCT is an outstanding method to help guide root canal therapy.

scholarly journals Classification and morphology of middle mesial canals of mandibular first molars in a Southern Chinese subpopulation: a cone-beam computed tomographic study

2020 ◽  
Author(s):  
Yeqing Yang ◽  
Ming Chen ◽  
Junkai Zeng ◽  
Buling Wu
Keyword(s):  
Incidence Rate ◽  
Root Canal ◽  
Cone Beam ◽  
Inclusion Criteria ◽  
Canal System ◽  
Computed Tomographic ◽  
Southern Chinese ◽  
Significant Difference ◽  
Group A ◽  
Group B

Abstract Background：Cone-beam computed tomography (CBCT) was used to study the morphology and curvature of the middle mesial canals (MMCs) of the mandibular first molars (MFMs).Methods：CBCT scanning was performed on the MFMs of 1100 patients. The pa tients' images which met the inclusion criteria were divided into group A (<40 years old) and group B (≥40 years old) for further study. To study the incidence of the MMCs at different ages, to measure the curvature of MMCs of mesiodistal and buccolingual direction by Schneider method, and to observe the anatomical morphology of the mesial root canal system.Results：In 875 patients, 1750 MFM images met the inclusion criteria, among which 158 MFMs contained a MMC, with an incidence rate of 9.03%. The incidence rate of MMCs was 11.22% in group A and 6.61% in group B, with statistically significant differences (P<0.05). The curvature in group A was 29.39±8.53° in mesiodistal direction while group B was 26.06±8.50 °, with statistical differences (P＜0.05). It has been shown that curved regions in group A and B were often found out in the middle 1/3. There is no significant difference in the distance between MMC orifices and mesiobuccal canal orifices or mesiolingual canal orifices (P>0.05). The most common mesial root canal morphology type was type II (3-2) (53.80%). Conclusion：The incidence of MMCs in MFMs was showed to decline along with the increase of age. The canal system of MMCs was varied and complex, mostly with mesiodistal curve obviously. CBCT is an outstanding assistant examination to the root canal therapy.

scholarly journals Classification and morphology of middle mesial canals of mandibular first molars in a Southern Chinese subpopulation: a cone-beam computed tomographic study

2020 ◽  
Author(s):  
Yeqing Yang ◽  
Buling Wu ◽  
Junkai Zeng ◽  
Ming Chen
Keyword(s):  
Incidence Rate ◽  
Root Canal ◽  
Statistical Significance ◽  
Morphological Type ◽  
Cone Beam ◽  
Inclusion Criteria ◽  
Southern Chinese ◽  
Significant Difference ◽  
Group A ◽  
Group B

Abstract Background: Cone-beam computed tomography (CBCT) was employed to study the morphology and curvature of middle mesial canals (MMCs) of mandibular first molars (MFMs).Methods: CBCT scanning was performed on MFMs of 1100 patients. Patients' images that met the inclusion criteria were divided into group A (<40 years old) and group B (≥40 years old) for further study. The images were used to study the incidence of MMCs at different ages, measure the curvature of MMCs in the mesiodistal and buccolingual directions using the Schneider method, and observe the anatomical morphology of the mesial root canal system. All statistical analyses were performed by using SPSS 21.0 software. Quantitative data were presented as mean ± standard deviation. Student’s t-test was used to calculate the statistical significance. P<0.05 was considered statistically significant.Results: In 875 patients, 1750 MFM images met the inclusion criteria. Among these cases, 158 MFMs contained an MMC, yielding an incidence rate of 9.03%. The incidence rate of MMCs was 11.22% in group A and 6.61% in group B, and this difference was statistically significant (P<0.05). The curvature in the mesiodistal direction was 29.39±8.53º in group A and 26.06±8.50º in group B, and this difference was also significant (P<0.05). The curved regions in groups A and B were often located in the middle 1/3 of canal. No significant difference in the distance between MMC orifices and mesiobuccal canal orifices or mesiolingual canal orifices was noted (P>0.05). The most common mesial root canal morphological type was type II (3-2) (53.80%). Conclusion: The incidence of MMCs in MFMs declined as age increased. The canal systems of MMCs were varied and complex, mainly exhibiting an obvious mesiodistal curve. CBCT is an outstanding method to help guide root canal therapy.

scholarly journals Classification and morphology of middle mesial canals of mandibular first molars in a Southern Chinese subpopulation: a cone-beam computed tomographic study

2020 ◽  
Author(s):  
Yeqing Yang ◽  
Buling Wu ◽  
Junkai Zeng ◽  
Ming Chen
Keyword(s):  
Incidence Rate ◽  
Root Canal ◽  
Statistical Significance ◽  
Morphological Type ◽  
Cone Beam ◽  
Inclusion Criteria ◽  
Southern Chinese ◽  
Significant Difference ◽  
Group A ◽  
Group B

Abstract Background: Cone-beam computed tomography (CBCT) was employed to study the morphology and curvature of middle mesial canals (MMCs) of mandibular first molars (MFMs).Methods: CBCT scanning was performed on MFMs of 1100 patients. Patients' images that met the inclusion criteria were divided into group A (<40 years old) and group B (≥40 years old) for further study. The images were used to study the incidence of MMCs at different ages, measure the curvature of MMCs in the mesiodistal and buccolingual directions using the Schneider method, and observe the anatomical morphology of the mesial root canal system. All statistical analyses were performed by using SPSS 21.0 software. Quantitative data were presented as mean ± standard deviation. Student’s t-test was used to calculate the statistical significance. P<0.05 was considered statistically significant.Results: In 875 patients, 1750 MFM images met the inclusion criteria. Among these cases, 158 MFMs contained an MMC, yielding an incidence rate of 9.03%. The incidence rate of MMCs was 11.22% in group A and 6.61% in group B, and this difference was statistically significant (P<0.05). The curvature in the mesiodistal direction was 29.39±8.53º in group A and 26.06±8.50º in group B, and this difference was also significant (P<0.05). The curved regions in groups A and B were often located in the middle 1/3 of canal. No significant difference in the distance between MMC orifices and mesiobuccal canal orifices or mesiolingual canal orifices was noted (P>0.05). The most common mesial root canal morphological type was type II (3-2) (53.80%). Conclusion: The incidence of MMCs in MFMs declined as age increased. The canal systems of MMCs were varied and complex, mainly exhibiting an obvious mesiodistal curve. CBCT is an outstanding method to help guide root canal therapy.

scholarly journals Classification and morphology of middle mesial canals of mandibular first molars in a southern Chinese subpopulation: a cone-beam computed tomographic study

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Yeqing Yang ◽  
Buling Wu ◽  
Junkai Zeng ◽  
Ming Chen
Keyword(s):  
Incidence Rate ◽  
Root Canal ◽  
Statistical Significance ◽  
Morphological Type ◽  
Cone Beam ◽  
Inclusion Criteria ◽  
Southern Chinese ◽  
Significant Difference ◽  
Group A ◽  
Group B

Abstract Background Cone-beam computed tomography (CBCT) was employed to study the morphology and curvature of middle mesial canals (MMCs) of mandibular first molars (MFMs). Methods CBCT scanning was performed on MFMs of 1100 patients. Patients' images that met the inclusion criteria were divided into group A (< 40 years old) and group B (≥ 40 years old) for further study. The images were used to study the incidence of MMCs at different ages, measure the curvature of MMCs in the mesiodistal and buccolingual directions using the Schneider method, and observe the anatomical morphology of the mesial root canal system. All statistical analyses were performed by using SPSS 21.0 software. Quantitative data were presented as mean ± standard deviation. Student’s t-test was used to calculate the statistical significance. P < 0.05 was considered statistically significant. Results In 875 patients, 1750 MFM images met the inclusion criteria. Among these cases, 158 MFMs contained an MMC, yielding an incidence rate of 9.03%. The incidence rate of MMCs was 11.22% in group A and 6.61% in group B, and this difference was statistically significant (P < 0.05). The curvature in the mesiodistal direction was 29.39 ± 8.53° in group A and 26.06 ± 8.50° in group B, and this difference was also significant (P < 0.05). The curved regions in groups A and B were often located in the middle 1/3 of canal. No significant difference in the distance between MMC orifices and mesiobuccal canal orifices or mesiolingual canal orifices was noted (P > 0.05). The most common mesial root canal morphological type was type II (3-2) (53.80%). Conclusion The incidence of MMCs in MFMs declined as age increased. The canal systems of MMCs were varied and complex, mainly exhibiting an obvious mesiodistal curve. CBCT is an outstanding method to help guide root canal therapy. *Yeqing Yang and Buling Wu have contribute equally to this article.

scholarly journals Apical Debris Extrusion by Adaptive Root Canal Instrumentation in Oval Canals: Full-Sequence SAF System vs. the XP-Endo Shaper Plus Sequence

2020 ◽  
Vol 10 (16) ◽  
pp. 5684 ◽  
Author(s):  
Ajinkya M. Pawar ◽  
Bhaggyashri A. Pawar ◽  
Anuj Bhardwaj ◽  
Alexander Maniangat Luke ◽  
Zvi Metzger ◽  
...  
Keyword(s):  
Root Canal ◽  
Significance Level ◽  
Full Sequence ◽  
Apical Extrusion ◽  
Significant Difference ◽  
Group A ◽  
Group B ◽  
Stage 1 ◽  
Two Stages ◽  
Root Canal Instrumentation

Apical extrusion of debris (AED) by the full sequence of the self-adjusting file (SAF) system was compared with that of the XP-endo shaper plus sequence. Sixty permanent mandibular incisors were randomly assigned to two groups (n = 30) for root canal instrumentation: Group A: Stage 1—pre-SAF OS, pre-SAF 1 and pre-SAF 2 files, followed by Stage 2—1.5 mm SAF; and Group B: Stage 1— hand K-file 15/0.02, followed by Stage 2—XP-endo shaper and Stage 3—XP-endo finisher. The AED produced during instrumentation at each stage was collected in pre-weighed Eppendorf tubes. The weights of AED by the two methods were compared using t tests with significance level set at 5%. Group A produced significantly less total AED than Group B (p < 0.001), with no significant difference in debris extrusion between the two stages (p = 0.3014). Conversely, in Group B, a significant difference was noted between Stage 1 and Stages 2 and 3 (p < 0.01), with no significant difference between Stages 2 and 3 (p = 0.488). Both sequences resulted in measurable amounts of AED. Each phase, in either procedure, made its own contribution to the extrusion of debris.

scholarly journals The Guiding Effect of Digital Image Based on Cone-Beam Computed Tomographic on Oval Root Canal Preparation

2021 ◽  
Author(s):  
Yiwei Wang ◽  
Wenjun Xia ◽  
Zisheng Tang ◽  
Yan Zou ◽  
Xiaohe Bian ◽  
...  
Keyword(s):  
Digital Image ◽  
Root Canal ◽  
Cone Beam ◽  
Control Group ◽  
Root Canal Preparation ◽  
Computed Tomographic ◽  
Significant Difference ◽  
3D Printed ◽  
Experimental Group ◽  
Guiding Effect

Abstract Background: To evaluate the guiding effect of digital image based on cone-beam computed tomographic in improving the quality of single oval root canal preparation.Methods: A premolar was selected by CBCT and a 3D-printed root canal model was made. Twenty postgraduates from the Department of Stomatology of Shanghai Ninth People's Hospital were selected to perform root canal preparation on 3D printed oval root canal model teeth. They were randomly assigned to two groups(n=10) according to the guiding method received: CBCT original image (control group) and CBCT-based digital image (experimental group). CBCT scans were performed on the models before and after the guidance. The changes in root canal cleanliness, residual minimum thickness, transportation and over-preparation amount were analyzed.Results: The experimental group caused significantly more increased amount of cleanliness compared to control group(P<0.05)：6.0373% ±6.0766% in the control group and 13.7193%±6.7102% in the experimental group. There was no significant difference in the reduction of residual minimum wall thickness between the two groups (P>0.05)： 0.0154mm±0.2110mm in the control group and 0.0362±0.0444mm in the experimental group. In the control group, the transportation after second preparation was generally increased (increased 0.0084mm on average). In the experimental group, the transportation was generally reduced after second preparation (reduced 0.0081mm on average). But there was no significant difference in the transportation change between the two groups (P>0.05). After the second preparation, there was no significant difference in the amount of increased over-preparation between the two groups（P＞0.05）: 1.7029%±3.6622% in the control group and 3.5144%±4.8075% in the experimental group.Conclusions: Compared with traditional CBCT image guidance, the digital image method can significantly improve the cleaning effect of the oval root canal preparation. It didn’t result in more over-preparation and the amount of residual wall thickness was ensured. At the same time, it has a certain effect on reducing transportation after the guidance.

scholarly journals Prevalence of Root Canal Configuration of Mandibular Second Molar Using Cone-Beam Computed Tomography in a Sample of Iraqi Patients

2021 ◽  
Vol 11 (1) ◽  
pp. 22-26
Author(s):  
Hiwa S. Khidir ◽  
Saud J. Dizayee ◽  
Sangar H. Ali
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Canal ◽  
Root Resorption ◽  
Cone Beam ◽  
Inclusion Criteria ◽  
Posterior Teeth ◽  
Second Molar ◽  
Significant Difference ◽  
Mandibular Second Molar

Introduction: The purpose of this study was to find out the prevalence of C-shaped canals configurations in mandibular 2nd molar and to investigate the gender prevalence. Materials and Methods: A sample of 1200 patients’ cone beam computed tomography (CBCT) scans were screened and evaluated by a maxillofacial radiologist assessed the axial, sagittal, and coronal sections. Inclusion criteria applied to 801 patients (452 females and 349 male) aged 14–75 years were included in this study with total of 1567 mandibular 2nd molar was evaluated. Inclusion criteria: Available CBCT images of mandibular posterior teeth with at least one mandibular 2nd molar in the scan, absence of root canal treatment, absence of coronal or post coronal restorations, absence of root resorption or periapical lesions, and high-quality images. Canal configuration was classified by criteria’s which described by Fan et al. (2004): (i) Fused roots, (ii) a longitudinal groove on the buccal or lingual surface of the root, and (iii) at least one cross-section of the canal belongs to the C1, C2, or C3 configuration. Results: Considering 801 patients, 97 (12.1%) patients females 57 (7.1%) and 40 (5%) males had a C-shaped canal with no statistical difference between females and males (P > 0.05). Conclusion: The occurrence of C- shaped canal mandibular 2nd molar is approximately 12.1% and no significant difference was found by gender.

scholarly journals The use of folic acid in dengue: has it any value?

2019 ◽  
Vol 49 (2) ◽  
pp. 85-87 ◽  
Author(s):  
Ahsan Ali Syed ◽  
Saad Bin Zafar ◽  
Asif Ali Shah ◽  
Safia Awan
Keyword(s):  
Folic Acid ◽  
Medical Records ◽  
Dengue Infection ◽  
Inclusion Criteria ◽  
Time Period ◽  
Significant Difference ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
Mean Time

Folic acid is used in dengue patients. Our study aims to compare the duration of recovery of thrombocytopenia in patients with dengue infection who received folic acid and those who did not. We retrospectively reviewed the medical records of adult patients admitted over six years with a diagnosis of dengue. Of 2216 patients, 1464 fulfilled the inclusion criteria. Group A were those patients who received folic acid and group B were those who did not. A total of 1322 (90.3%) patients received folic acid. The mean time period required for platelets to double the nadir was 1.7 (±2.2) days in both groups A and B ( P = 0.89). In conclusion, there is no significant difference in the recovery of thrombocytopenia in patients with dengue fever who received folic and those who did not receive folic acid.

Dexamethasone Versus Ondansetron in Preventing Postoperative Nausea and Vomiting In Laparoscopic Surgery

2021 ◽  
Vol 17 (3) ◽  
pp. 222-226
Author(s):  
Anum Malik ◽  
Arshad Shahani ◽  
Jawad Zahir ◽  
Hassam Zulfiqar ◽  
Tabassum Aziz
Keyword(s):  
Postoperative Nausea ◽  
Postoperative Nausea And Vomiting ◽  
Nausea And Vomiting ◽  
P Value ◽  
Inclusion Criteria ◽  
Significant Difference ◽  
Quasi Experimental ◽  
Group A ◽  
The Mean ◽  
Group B

Objective: To compare the efficacy of dexamethasone 8mg versus ondansetron 4mg in preventing postoperative nausea and vomiting (PONV) in patients undergoing laparoscopic cholecystectomy Methodology: This quasi-experimental study was conducted at the Department of Anaesthesia and Intensive Care, Holy Family Hospital from 29th July 2018 to 28th January 2019.  Anesthesia was induced with propofol (2mg/kg IV) and Atracurium (0.5 mg/kg IV) was given to facilitate tracheal intubation. Nalbuphine (0.2mg/kg) was used as analgesic.Patients were randomly divided into two groups. Patients in Group A received 4mg ondansetron at end of surgery and Group B received 8mg dexamethasone at induction. Results: A total of 90 patients were included according to the inclusion criteria of the study. The mean age (years) in the study was 37.11+10.60 years. Frequency and percentage of nausea (up to 24 hours) among both the groups was 28 (62.2) and 28 (62.2) respectively (p-value = 1.0) while the frequency and percentage of vomiting (within 24 hours after extubation) was 28 (62.2) and 27 (60.0) respectively (p-value = 0.829) Conclusion: The study concluded that there was no significant difference dexamethasone and ondansetron in preventing postoperative nausea and vomiting.

Sign in / Sign up

Export Citation Format

Share Document