The minimum residual root thickness after using ProTaper, RaCe and Gates-Glidden drills: A cone beam computerized tomography study

ABSTRACT Objective: The aim of this study was to evaluate the minimum residual root thickness (MRRT) of the danger zone after preflaring of the mesio-buccal (MB) canal of mandibular first molars using ProTaper, RaCe and Gates-Glidden (GG) drills as coronal shapers by cone beam computerized tomography (CBCT). Materials and Methods: In this experimental study, the initial CBCT scans of 75 MB canals of mandibular first molars were provided within 1, 2, 3 and 4 mm of the furcation level. The samples were divided into three groups. The samples of ProTaper and RaCe groups were prepared up to F2 and #25.04 as the master apical file (MAF), respectively. The coronal preparation of the samples in the GG group was done using GG drills #2, #3 and #4 and canals were prepared till MAF # 25. After obtaining the postinstrumentation images, the MRRT and the amount of removed dentin were analyzed by t-test and ANOVA statistical analyses. Results: The GG drills removed significantly more dentin than RaCe at all the sections (P < 0.05) and more than ProTaper at 3 mm from the furcation. Statistically there was no significant difference between ProTaper and RaCe groups (P > 0.05). There was no significant difference in MRRT between the groups (P > 0.05). The mean MRRT was not < 0.75 mm at all sections. Conclusion: Based on the results of this study, when an appropriate root thickness is initially present, all of the instruments that were investigated may safely be used as coronal shapers in MB canals of mandibular first molars.

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Accuracy of Cone Beam Computerized Tomography and a Three-Dimensional Stereolithographic Model in Identifying the Anterior Loop of the Mental Nerve: A Study on Cadavers

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-11-00130 ◽

2012 ◽

Vol 38 (6) ◽

pp. 668-676 ◽

Cited By ~ 14

Author(s):

Ruben R. Santana ◽

Jaime Lozada ◽

Alejandro Kleinman ◽

Aladdin Al-Ardah ◽

Alan Herford ◽

...

Keyword(s):

Computerized Tomography ◽

Mean Difference ◽

Cone Beam ◽

Nerve Plexus ◽

Mental Nerve ◽

Stl Model ◽

Anterior Loop ◽

Significant Difference ◽

Cone Beam Computerized Tomography ◽

The Mean

The objective of this ex vivo cadaver study was to determine the accuracy of cone beam computerized tomography (CBCT) and a 3-dimensional stereolithographic (STL) model in identifying and measuring the anterior loop length (ANLL) of the mental nerve. A total of 12 cadavers (24 mental nerve plexus) were used for this study. Standardized CBCT scans of each mandible were obtained both with and without radiographic contrast tracer injected into the mental nerve plexus, and STL models of the two acquired CBCT images were made. The ANLL were measured using CBCT, STL model, and anatomy. The measurements obtained from the CBCT images and STL models were then analyzed and compared with the direct anatomic measurements. A paired sample t test was used, and P values less than .05 were considered statistically significant. The mean difference between CBCT and anatomic measurement was 0.04 mm and was not statistically significant (P = .332), whereas the mean difference between STL models and anatomic measurement was 0.4 mm and was statistically significant (P = .042). There was also a statistical significant difference between CBCT and the STL model (P = .048) with the mean difference of 0.35 mm. Therefore, CBCT is an accurate and reliable method in determining and measuring the ANLL but the STL model over- or underestimated the ANLL by as much as 1.51 mm and 1.83 mm, respectively.

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Assessment of the Anterior Loop of the Mental Nerve Using Cone Beam Computerized Tomography Scan

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-13-00346 ◽

2015 ◽

Vol 41 (6) ◽

pp. 632-639 ◽

Cited By ~ 17

Author(s):

Chun-I Lu ◽

John Won ◽

Aladdin Al-Ardah ◽

Ruben Santana ◽

Dwight Rice ◽

...

Keyword(s):

Computerized Tomography ◽

Age Groups ◽

Inferior Alveolar Nerve ◽

Mental Foramen ◽

Cone Beam ◽

Mental Nerve ◽

Anterior Loop ◽

Significant Difference ◽

Cone Beam Computerized Tomography ◽

The Mean

The purpose of this study is to use cone-beam computerized tomography (CBCT) scans with oblique-transverse reconstruction modality to measure and compare the anterior loop length (AnLL) of the mental nerve between gender and age groups and to compare the difference between the right and left sides. Sixty-one female and 61 male CBCT scans were randomly selected for each age group: 21–40, 41–60, and 61–80 years. Both right- and left-side AnLLs were measured in each subject using i-CATVision software to measure AnLLs on the oblique transverse plane using multiplanar reconstruction. The anterior loop was identified in 85.2% of cases, with the mean AnLL of the 366 subjects (732 hemimandibles) being 1.46 ± 1.25 mm with no statistically significant difference between right and left sides or between different gender groups. However, the mean AnLL in the 21–40 year group (1.89 ± 1.35 mm) was larger than the AnLL in the 41–60 year group (1.35 ± 1.19 mm) and the 61–80 year group (1.13 ± 1.08 mm). In conclusion, when placing implants in close proximity to mental foramina, caution is recommended to avoid injury to the inferior alveolar nerve. No fixed distance anteriorly from the mental foramen should be considered safe. Using CBCT scans with the oblique-transverse method to accurately identify and measure the AnLL is of utmost importance in avoiding and protecting its integrity.

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Assessment of Location of Mental Foramen in Mandible Using Cone Beam Computerized Tomography

Journal of Bahria University Medical and Dental College ◽

10.51985/jbumdc2020065 ◽

2020 ◽

Vol 10 (4) ◽

pp. 291-295

Author(s):

Shoaib Rahim ◽

Maria Shakoor ◽

Ali Qureshi

Keyword(s):

Computerized Tomography ◽

Care Center ◽

Tertiary Care ◽

Mental Foramen ◽

Cone Beam ◽

P Value ◽

Mandibular Symphysis ◽

Cone Beam Computerized Tomography ◽

The Mean ◽

Inferior Border

Objective: To determine the mean distance of mental foramen from the base of the mandible and mandibular symphysis in patients reporting to tertiary care center using Cone Beam Computerized Tomography (CBCT). Study design and setting: Cross-Sectional Study was carried out in the Prosthodontics Department, Foundation University College of Dentistry, Islamabad from March 2019 to August 2019. Methodology: Total 100 patients between the age of 20-45 years were participated. CBCT investigation was carried out and measurements of mental foramen from the base of the mandible and mandibular symphysis in patients were recorded with the help of measuring tools in the software and noted down on the performa. SPSS version 20 was used analyze the data. P value less than 0.05 was considered as statistically significant. . Frequency and percentages were calculated for variable gender (qualitative). For quantitative variables like age, distance mental foramen from the mandibular Symphysis and inferior border of mandible, mean + SD were calculated. Independent samples t-test was used to compare quantitative variables like distance MF from the mandibular symphysis/midline and inferior border of mandible. P values < 0.05 was considered as statistically significant. Results: The Mean+SD distance of anterior border of mental foramen from symphysis on left and right side were 24.12+2.835 and 24.88+2.637 and from the lower border of mandible were 11.97+1.359 and 12.00+1.764 respectively. Conclusion: The mean vertical and horizontal distances calculated in this study can provide a useful guide to dentist to safely place dental implants within the inter-foraminal region in our population

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SCIENTIFIC JUSTIFICATION OF THE USE OF CONE-BEAM COMPUTERIZED TOMOGRAPHY (CBCT) FOR CEPHALOMETRIC ANALYSIS IN THE «AUDAXCEPH» PROGRAMM

Ukrainian Dental Almanac ◽

10.31718/2409-0255.4.2019.09 ◽

2019 ◽

pp. 52-56

Author(s):

V.D. Kuroiedova ◽

Y.Y. Vyzhenko ◽

O.M. Makarova ◽

O.A. Stasiuk

Keyword(s):

Computerized Tomography ◽

Cone Beam ◽

Cephalometric Analysis ◽

3D Reconstructions ◽

Significant Difference ◽

Scientific Justification ◽

Dental Radiographs ◽

Cone Beam Computerized Tomography

This article is concerned with peculiarities of points’ placement in orthodontics and study of cephalometric parameters on 3D reconstructions. The aim of the investigation is to develop out the algorithm of distribution of main cephalometric points on 3D reconstructions, received from CBCT and compare characteristics of measurements done on classic teleroentgenogram (TRG) and 3D reconstructions. Materials and methods. The main angular (SNA, SNB, ANB, SN-Ba) skeletal saggital parameters, vertical (ML-NSL, NL-ML, Facial axis, <G), and dental were taken (+1/NL, -1/ML, +1/-1). The analysis of dental radiographs was done for cephalometry «AudaxCeph». Teleroentgenogram and 3 D reconstructions of 20 patients were investigated. Comparing all indices of TRG and 3D reconstructions statistically significant difference was not revealed (р> 0,05). The most significant indices was established during the study of incisive indices - +1/NL, 110±2,72 и 110,2±5,02 correspondingly inter-incisal angle +1/-1 - 133,8±2,21 and 138±5,79.

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ASSESSMENT OF MEAN DISTANCE OF MANDIBULAR INCISIVE CANAL USING CONE BEAM COMPUTERIZED TOMOGRAPHY; A CROSS-SECTIONAL STUDY

Pakistan Armed Forces Medical Journal ◽

10.51253/pafmj.v71i5.7287 ◽

2021 ◽

Vol 71 (5) ◽

pp. 1801-05

Author(s):

Mubashir Sharif ◽

Nighat Haroon ◽

Muhammad Anwaar Alam ◽

Adil Umar Durrani ◽

Talib Hussain ◽

...

Keyword(s):

Computerized Tomography ◽

Mental Foramen ◽

Cross Sectional Study ◽

Cone Beam ◽

Sectional Study ◽

Cross Sectional ◽

Incisive Canal ◽

Number Of Patients ◽

Cone Beam Computerized Tomography ◽

The Mean

Objective: To determine the mean distance of mandibular incisive canal from the mental foramen in patients reporting to a tertiary care centre using Cone Beam Computerized Tomography for placement of dental implants in the anterior/interforaminal region. Study Design: Cross-sectional study. Place and Duration of Study: Department of Prosthodontics, Foundation University College of Dentistry Rawalpindi, Jun to Nov 2019. Methodology: A total of 70 patients participated between the age of 20-45 years. Cone Beam Computerized Tomography (the investigation was carried out and measurements of the mandibular incisive canal from mental foramen were recorded with the help of measuring tools in the software and noted down on the proforma. Data were analyzed using SPSS-20. Results: The number of patients selected for this study was 70. Out of these 70 patients, 33 (47.1%) were males and 37 (52.9%) were females. The mean age of patients in this study was 36.31 ± 6.38 years. The mean distance/extension of the mandibular incisive canal from left mental foramen and right mental foramen in all patients was recorded to be 14.49 ± 6.31 mm and 14.97 ± 7.10 mm respectively. Conclusion: Within the limitations of this study, it is concluded that a maximum distance of 22mm of the incisive canal from the mental foramen was observed using cone-beam computerized tomography.

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Assessing bone thickness in the infrazygomatic crest area aiming the orthodontic miniplates positioning: a tomographic study

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.22.4.070-076.oar ◽

2017 ◽

Vol 22 (4) ◽

pp. 70-76 ◽

Cited By ~ 4

Author(s):

Aline Rode Santos ◽

Marcelo Castellucci ◽

Iêda Margarida Crusoé-Rebello ◽

Márcio Costa Sobral

Keyword(s):

Computerized Tomography ◽

Adult Male ◽

Adult Patients ◽

Cone Beam ◽

Bone Thickness ◽

Cross Sectional ◽

Male And Female ◽

Measurement Results ◽

Cone Beam Computerized Tomography ◽

The Mean

ABSTRACT Introduction: Due to the increasing use of miniplates for anchorage purposes in orthodontics, it is very important to know more about infrazigomatic crest anatomy (thickness), in adult patients. Objectives: Evaluate the infrazygomatic crest region thickness, in adult (male and female) patients. Methods: Cone-beam computerized tomography (CBCT) images from 40 patients were used to assess cross-sectional measurements of the infrazygomatic crest region. Measurement 1 considered thickness 2 mm above the distobuccal root of the permanent maxillary first molar, while measurement 2 was taken 2 mm above the first measurement. Results: The mean thickness of the infrazygomatic crest in males was 3.55 mm for measurement 1 and 2.84 mm for measurement 2, while in females these were 2.37 mm and 2.24 mm, respectively. Conclusion: The authors concluded that the overall mean thickness of the infrazygomatic crest was 2.49 mm with respect to measurement 1, and 2.29 mm for measurement 2, with no statistically significant differences between gender.

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Cone Beam Computerized Tomography Analysis of the Posterior and Anterior Mandibular Lingual Concavity for Dental Implant Patients

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-16-00084 ◽

2017 ◽

Vol 43 (1) ◽

pp. 12-18 ◽

Cited By ~ 2

Author(s):

Thomas Y. H. Yoon ◽

Mitesh Patel ◽

Richard A. Michaud ◽

Alexandra M. Manibo

Keyword(s):

Computerized Tomography ◽

Statistical Significance ◽

Cone Beam ◽

Cross Sectional ◽

Significant Difference ◽

Vertical Location ◽

Mandibular Region ◽

Cone Beam Computerized Tomography ◽

Left And Right ◽

Tomography Analysis

This study was conducted to evaluate variations in and the prevalence of the lingual concavity. Images were taken between January 1, 2011, and August 31, 2015, from a total of 104 patient charts randomly selected from a private practice. These images were acquired from a single cone beam computerized tomography (CBCT) machine. The CBCTs were reviewed in cross-sectional images in both the left and right anterior incisor and posterior molar regions. These scans were classified into 1 of 3 categories—parallel, concave, or convex—based on the measurements of the level of concavity degree as well as the mandibular morphology observed. Lingual concavity characteristics including depth, angulation, and vertical location were also measured. Most of the posterior mandibular CBCT scans were classified as concave. Although there was no significant difference detected for race or gender, statistical significance was noted with regard to age, with an increase in prevalence observed at age 63 years and older. Of the 3 different morphological classifications used, the vast majority were identified as concave in the posterior mandibular regions and parallel in the anterior mandibular region. There was a significant decrease in concavity VL/height (bone loss) associated with age, which was most commonly seen in edentulous areas.

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Anterior Loop of the Inferior Alveolar Canal: A Cone-Beam Computerized Tomography Study of 494 Cases

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-15-00038 ◽

2016 ◽

Vol 42 (4) ◽

pp. 333-336 ◽

Cited By ~ 8

Author(s):

Halil Sahman ◽

Yildiray Sisman

Keyword(s):

Statistical Analysis ◽

Computerized Tomography ◽

Cone Beam ◽

Loop Length ◽

Anterior Loop ◽

Cbct Image ◽

Inferior Alveolar Canal ◽

Cone Beam Computerized Tomography ◽

The Mean ◽

The Right

The aim of this study was to use cone-beam computerized tomography (CBCT) images of patients to assess the prevalence of different types, especially anterior loop, of the mental portion of the inferior alveolar canal and to evaluate the anterior loop lengths. CBCT images of 494 patients providing inclusion criteria were examined by 2 oral radiologists. Sagittal, axial, and multiplanar reformatted images were used to detect the type of mental portion of the inferior alveolar canal. The anterior loop length was measured in the respective sections of each CBCT image. Statistical analysis was performed using SPSS v. 15, and t tests were used for statistical analysis. Of the 494 patients, 217 anterior loops were detected in 141 (28.5%) patients. The mean anterior loop lengths for the right side and the left side were 2.19 ± 1 mm and 2.08 ± 0.89 mm, respectively. The difference between males and females in the mean anterior loop length was statistically significant for both sides (Right: P < .05; Left: P < .05). A presurgical CBCT image examination is necessary prior to implant insertion to reveal the presence of anterior loop and to detect actual anterior loop length.

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The Effect of Hope Therapy-based Training on the Happiness of Women with Breast Cancer: A Quasi-experimental Study

Medical - Surgical Nursing Journal ◽

10.5812/msnj.113501 ◽

2021 ◽

Vol 9 (4) ◽

Author(s):

Niloofar Kondori Fard ◽

Asadollah Keikhaei ◽

Maliheh Rahdar ◽

Nasrin Rezaee

Keyword(s):

Breast Cancer ◽

Experimental Study ◽

Intervention Group ◽

T Test ◽

Control Group ◽

Paired Samples ◽

Significant Difference ◽

Quasi Experimental ◽

The Mean ◽

Hope Therapy

Background: The prevalence of cancer and its psychological consequences has increased steadily in recent decades. Hence, parallel to providing medical interventions, psychological therapies should be provided to cancer patients. Objectives: The present study aimed to determine the effect of hope therapy-based training on the happiness of women with breast cancer. Methods: In this quasi-experimental study, 100 female patients with breast cancer admitted to the chemotherapy wards of two hospitals affiliated to the Zahedan University of Medical Sciences (Iran) in 2020 are studied. Participants were selected using the convenience sampling technique and randomly divided into two groups of intervention and control (each with 50 subjects). The intervention group received eight sessions of group-based hope therapy training. Data were collected using a demographic information form and the Oxford Happiness questionnaire. Data were analyzed using SPSS version 16 by chi-square, independent samples t-test, and paired samples t-test, at a significant level of P < 0.05. Results: There was no significant difference between the two groups concerning demographic characteristics. The independent samples t-test showed no significant difference in the mean scores of happiness between the two groups before the intervention (P = 0.55). However, the mean score of happiness for the participants in the intervention group showed a significant increase after providing the intervention compared to the control group (P = 0.001). Besides, the paired samples t-test indicated a significant increase in the mean score of happiness after providing the intervention compared to before intervention (P = 0.001), while the mean score of happiness for the participants in the control group showed a statistically significant decrease (P = 0.004). Conclusions: This study demonstrated that hope therapy-based training is effective for the happiness of women with breast cancer. Since physical and psychological problems caused by cancer lead to sadness and reduced happiness, hope therapy can be added to the care programs for women with cancer undergoing chemotherapy.

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Pattern of symptom improvement following endoscopic sinus surgery for chronic rhinosinusitis

BMC Surgery ◽

10.1186/s12893-021-01269-1 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Salma S. Al Sharhan ◽

Mohammed H. Al Bar ◽

Shahad Y. Assiri ◽

Assayl R. AlOtiabi ◽

Deemah M. Bin-Nooh ◽

...

Keyword(s):

Surgical Outcomes ◽

Endoscopic Sinus Surgery ◽

T Test ◽

Sinus Surgery ◽

Symptom Improvement ◽

P Value ◽

Psychological Dysfunction ◽

Significant Difference ◽

The Mean ◽

Snot 22

Abstract Background Chronic rhinosinusitis (CRS) is a common inflammation of the nose and the paranasal sinuses. Intractable CRS cases are generally treated with endoscopic sinus surgery (ESS). Although the effect of ESS on CRS symptoms has been studied, the pattern of symptom improvement after ESS for CRS is yet to be investigated. The aim of this study was to determine the magnitude and sequence of symptom improvement after ESS for CRS, and to assess the possible preoperative factors that predict surgical outcomes in CRS patients. Methods This was a longitudinal prospective study of 68 patients who had CRS (with or without nasal polyps). The patients underwent ESS at King Fahd Hospital of the University, Al Khobar, Saudi Arabia. The Sino-nasal Outcome Test-22 (SNOT-22) questionnaire was used for assessment at four time points during the study: pre-ESS, 1-week post-ESS, 4 weeks post-ESS, and 6 months post-ESS. Results The difference between the mean scores recorded for the five SNOT-22 domains pre-ESS and 6 months post-ESS were as follows: rhinologic symptoms (t-test = 7.22, p-value = < 0.001); extra-nasal rhinologic symptoms (t-test = 4.87, p-value = < 0.001); ear/facial symptoms (t-test = 6.34, p-value = < 0.001); psychological dysfunction (t-test = 1.99, p-value = 0.049); and sleep dysfunction (t-test = 5.58, p-value = < 0.001). There was a significant difference between the mean scores recorded for the five domains pre-ESS and 6 months post-ESS. Rhinologic symptoms had the largest effect size (d = 1.12), whereas psychological dysfunction had the least effect size (d = 0.24). The only statistically significant difference in the SNOT-22 mean scores recorded 4 weeks post-ESS was observed between allergic and non-allergic patients (t = − 2.16, df = 66, p = 0.035). Conclusion Understanding the pattern of symptom improvement following ESS for CRS will facilitate patient counselling and aid the optimization of the current treatment protocols to maximize surgical outcomes and quality of life. Level of evidence Prospective observational.

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