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 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 ◽  
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 ◽  
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 ◽  
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 Comparative evaluation of ropivacaine and lidocaine as dental pulp anaesthesia

2021 ◽  
Vol 17 (1) ◽  
pp. 229-239
Author(s):  
Vijayapriyangha Senthilkumar ◽  
Keyword(s):  
Root Canal ◽  
Statistical Significance ◽  
Inferior Alveolar Nerve ◽  
Root Canal Therapy ◽  
Pain Scores ◽  
Significant Difference ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
Irreversible Pulpitis

Root canal therapy linked to pulpal diseases or trauma is common in modern dental care. The 2% Lidocaine which is considered as the gold standard has some drawbacks in pulpal anaesthesia. Ropivacaine has beneficial anaesthetic effects on pulpal anaesthesia. Therefore, it is of interest to compare and evaluate the pulpal aesthetic effect using 0.5% Ropivacaine and 2% Lidocaine in symptomatic irreversible pulpitis. A double blinded randomized controlled clinical trial consisting of 110 lower molar and premolar tooth with irreversible pulpitis cases for root canal therapy were selected and randomly divided into 2 groups. Group A: 2% lidocaine with epinephrine and Group B: 0.5% ropivacaine. The pulp sensibility tests with heat test, cold test and electric pulp test were completed. The preoperative pain score was measured with Visual Analogue Scale (VAS) pain scale. Classical inferior alveolar nerve block (IANB) technique was given to all patients by a single operator. Subjects were asked for lip numbness and presence or absence of lip numbness. Postoperative pain scores were recorded during access opening and on placing files in the canal. There is no statistical difference between the groups during pre operative conditions. The mean pain scores within group A and group B is recorded. The difference was found to be statistically significant with p value ≤ 0.05. Significant difference between the mean values after and before the treatment is observed. However, there is no statistical significance between the mean pain scores between the access and pulp. The 0.5% Ropivacaine and 2% Lidocaine with epinephrine does not have any significant difference during access opening. However, 0.5% Ropivacaine groups were effective while placing the file in the canal. Thus, 0.5% Ropivacaine showed better results even though it was not statistically significant for further consideration in this context.

scholarly journals P-B02 Does the length of  alimentary limb  make a significant difference  in the weight loss in  Roux en y gastric bypass patients?

2021 ◽  
Vol 108 (Supplement_9) ◽  
Author(s):  
Mayank Bhandari ◽  
Sabyasachi Chowdhary ◽  
Milind Rao ◽  
Gopinath Bussa ◽  
Julie Holm
Keyword(s):  
Weight Loss ◽  
Gastric Bypass ◽  
Statistical Significance ◽  
Limb Length ◽  
Alimentary Limb ◽  
Significant Difference ◽  
Alimentary Limb Length ◽  
Biliopancreatic Limb ◽  
Group A ◽  
Group B

Abstract Background Roux en Y gastric bypass (RYGB) surgery for morbid obesity is considered as gold standard, but there can be a difference in the length of alimentary and biliopancreatic limb to achieve optimum weight loss. Till now there is no agreed consensus on the ideal limb lengths and their effect on the weight loss. We would like to evaluate the change in the alimentary limb length on the weight loss after the gastric bypass surgery,  as a short to medium term single center study. Methods A retrospective analysis from prospectively maintained   database of 523 patients who underwent RYGB from  2012 till 2018 was done. Patient who had at least a follow up of 2 years(n = 388) were included.  At our center we use alimentary limb of 120 +/- 10 cm for Body Mass Index (BMI) &lt; 40 kg/m2 (group A)  and 150+/-10 cm for the BMI &gt;40 kg/m2  (Group B). The biliopancreatic limb length varies from 50 to 70 cm and this does not change with BMI.  The percentage excess weight(EWL) loss was measured and analyzed  at 1st  and 2nd year post operatively. We used paired t test to check for statistical significance. Results There were 172 patients in Group A and 216 in Group B. The number of females were 330 and  males were 58.   The average age was 44 years .  The mean  preoperative  BMI for the 120 cm limb group was  37.1 kg/m2 and  that for  150 cm limb was 45.3kg/m2. The EWL for the group A at 1 year and 2 year post op was a  Mean and standard deviation  of 79.3% +/- 39.4% and 78.3% +/- 35.2% respectively and for group B was 58.8% +/- 26.6% and 58.6% +/- 23.2% respectively. The difference was statistically significant (p &lt; 0.001) . The analysis and interpretation for metabolic syndrome is yet to be determined.   Conclusions In our study, Increasing the alimentary limb length for higher BMI reduced  EWL. This is consistent with few other publications regarding the same. This has resulted in a  change in our practice namely keeping the length of alimentary limb constant and varying the BP limb length. We will be analyzing  and presenting this data in future.

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.

Calcium dobesilate and oxerutin: effectiveness of combination therapy

2010 ◽  
Vol 25 (2) ◽  
pp. 66-71 ◽  
Author(s):  
B Akbulut
Keyword(s):  
Combination Therapy ◽  
Venous Insufficiency ◽  
Statistical Significance ◽  
Symptomatic Relief ◽  
Antioxidant Properties ◽  
Erythrocyte Aggregation ◽  
Calcium Dobesilate ◽  
Significant Difference ◽  
Group A ◽  
Group B

Objectives Chronic venous insufficiency (CVI) is an important cause of discomfort and inability to work. Hydroxyethylrutosides (Venoruton®; 0-[beta-hydroxyethyl]-rutosides) has been used for decades for the treatment of CVI. Studies have reported symptomatic relief and a decreased capillary filtration after the administration of the oral preparations. Calcium dobesilate is a synthetic venoactive drug acting on several levels. It inhibits capillary permeability; it has antioxidant properties; and it inhibits the synthesis of prostaglandins and thromboxanes, reducing platelet and erythrocyte aggregation, as well as blood viscosity. The aim of this study is to determine whether the combination of both drugs is more effective in decreasing patients' complaints. Methods One hundred and fifty patients with primary venous insufficiency were randomized into three groups: Group A receiving calcium dobesilate only, Group B receiving oxerutin only and Group C receiving both calcium dobesilate and oxerutin. Patients were evaluated with a questionnaire before and four weeks after treatment regarding following parameters: itching, fatigue, heaviness, numbness, cramp, swelling and sensitiveness. Patients rated their symptoms from 0 to 4 (0: absent; 1: mild; 2: moderate; 3: severe; 4: very severe). Results Complaints, which were scored by patients before and after treatment, decreased. Among the single-drug groups, itching score decreased more in Group B, whereas scores of fatigue, heaviness, numbness, cramp and swelling decreased more in Group A. But the difference was not significant, statistically. But all complaints decreased significantly in Group C. Difference of scores after treatment revealed no statistical significance in Group A and B, but scores of Group C produced a significant difference when compared with Group A and B. Conclusion Results demonstrate that a combination of calcium dobesilate and oxerutin shows a better improvement of complaints. These observations have to be confirmed in larger series with objective tests. Changes of quality of life after a combination therapy might also be of interest.

scholarly journals Comparative Evaluation of the Embrasure Wire versus Arch Bar Maxillomandibular Fixation in the Management of Mandibular Fractures: Are Arch Bars Replaceable?

2018 ◽  
Vol 11 (2) ◽  
pp. 118-123
Author(s):  
Sanjay Rastogi ◽  
Tousif Ahmed ◽  
Kolli Giri ◽  
Ramakant Dandriyal ◽  
Indra B. Niranjana Prasad ◽  
...  
Keyword(s):  
Statistical Significance ◽  
Demographic Data ◽  
Study Data ◽  
Mandibular Fractures ◽  
Intermaxillary Fixation ◽  
Maxillomandibular Fixation ◽  
Arch Bar ◽  
Significant Difference ◽  
Group A ◽  
Group B

The aim of this prospective study was to appraise the role of embrasure wiring in the treatment of mandibular fractures over the arch bar as adjunctive techniques of maxillomandibular fixation (MMF). This study was conducted on 40 patients who were surgically treated for mandibular fractures with accessory use of MMF (embrasure: group A vs. arch bars: group B). All patients were evaluated for demographic data, etiology, and location of fracture. Characteristically, the complications, including wire injury, infection, and malocclusion, were recorded. The data were analyzed using Student's t-test and chi-square test as appropriate. Statistical significance was set at p < 0.05). In this study, data from 40 patients were included. In group A (embrasure wiring), time required for placement of MMF was significantly less than (7.85 ± 0.81 minutes) that in group B, and also there was less incidence of wire prick to the operator in group A than in group B ( p < 0.05). However, in terms of wire prick and malocclusion, no statistically significant difference was noted in groups A and B ( p > 0.05). Patient treated with embrasure wiring intermaxillary fixation had better outcomes especially in terms of time of placement and less incidence of wire prick injury when compared with arch bar.

Sign in / Sign up

Export Citation Format

Share Document