Three-dimensional CBCT based evaluation of the inferior part of the maxillary sinus: Retrospective Study

AbstractThe maxillary sinus is the largest of the four paranasal sinuses in humans, and its close proximity to the teeth means that caution is required during dental treatment. In particular, implant surgeries involving the maxillary posterior teeth should include evaluating the inferior part of the maxillary sinus. The purpose of this study is to evaluate the differences by comparing the inferior part of the maxillary sinus based on the nasal cavity floor (NCF) between patients (male 30, female 30) genders through the use of the three-dimensional (3-D) program that can facilitate 3-D visualizations. The present study results obtained from 3-D visualizations using cone beam computed tomography (CBCT) data showed that the inferior part of the maxillary sinus was mostly larger in males than in females. In addition, the utilization of 3-D visualization data was more likely to assure accuracy than when using data obtained by two-dimensional (2-D) imaging. Therefore, 3-D visualizations of the inferior part of the maxillary sinus will contribute to accurate analyses of its anatomical structure during implant surgery and other operations. Further studies utilizing 3-D visualization will yield useful fundamental data and guidelines for future research.

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Three-dimensional linear and volumetric assessment of the maxillary sinus following posterior teeth extraction with implications for dental implant: A split mouth cross-sectional cone-beam computed tomographic study

Journal of Dental Implants ◽

10.4103/jdi.jdi_18_20 ◽

2021 ◽

Vol 11 (1) ◽

pp. 30

Author(s):

NinadMilind Padhye ◽

VinayakUmesh Shirsekar ◽

PrasadDiwakar Bhange ◽

ShitalS Nikam ◽

AshleshaS Marathe

Keyword(s):

Maxillary Sinus ◽

Dental Implant ◽

Three Dimensional ◽

Cone Beam ◽

Cross Sectional ◽

Posterior Teeth ◽

Computed Tomographic ◽

Volumetric Assessment ◽

Teeth Extraction

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Proximity of Posterior Teeth to the Maxillary Sinus and Buccal Bone Thickness: A Biometric Assessment Using Cone-beam Computed Tomography

Journal of Endodontics ◽

10.1016/j.joen.2015.08.011 ◽

2015 ◽

Vol 41 (11) ◽

pp. 1839-1846 ◽

Cited By ~ 26

Author(s):

Sung Hyun Kang ◽

Bom Sahn Kim ◽

Yemi Kim

Keyword(s):

Computed Tomography ◽

Maxillary Sinus ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Bone Thickness ◽

Posterior Teeth

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Police Cadets’ Career Plans in China: Testing the Mediation and Moderation Effects of Job Satisfaction

Police Quarterly ◽

10.1177/1098611119887811 ◽

2019 ◽

Vol 23 (2) ◽

pp. 202-231

Author(s):

Bitna Kim ◽

Tao Xu

Keyword(s):

Police Officers ◽

Turnover Intention ◽

Mediating Effect ◽

Future Research ◽

Career Plans ◽

Police Organizations ◽

Study Results ◽

Degree Of Satisfaction ◽

Using Data ◽

The Relationship

In recent decades, police organizations have encountered difficulty in maintaining employees; a large number of police officers are leaving the service early. Using data collected from three police colleges in three different provinces in China, this study examines the mechanism of cadets’ career plan or turnover intention. Specifically, the test of a mediating mechanism in this study demonstrates the extent to which satisfaction mediates the relationship between distal factors and career plans among police cadets. Besides, the test of a moderating mechanism focuses on the possibility that the predictors differ in the relationship with cadets’ career plans by the degree of satisfaction. This study results found that satisfaction had no mediating effect. Instead, results showed that police cadets’ satisfaction is a strong moderator in the link between predictors and their career plans. Implications for recruitment, training, and retention strategies, as well as avenues for future research, are then discussed.

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Outliers in L2 Research in Applied Linguistics: A Synthesis and Data Re-Analysis

Annual Review of Applied Linguistics ◽

10.1017/s0267190520000057 ◽

2020 ◽

Vol 40 ◽

pp. 26-55 ◽

Cited By ~ 1

Author(s):

Christopher Nicklin ◽

Luke Plonsky

Keyword(s):

Phase I ◽

Relative Effectiveness ◽

Reaction Time Data ◽

Future Research ◽

Time Data ◽

Two Phase ◽

Raw Data ◽

Study Results ◽

Using Data ◽

The Impact

AbstractData from self-paced reading (SPR) tasks are routinely checked for statistical outliers (Marsden, Thompson, & Plonsky, 2018). Such data points can be handled in a variety of ways (e.g., trimming, data transformation), each of which may influence study results in a different manner. This two-phase study sought, first, to systematically review outlier handling techniques found in studies that involve SPR and, second, to re-analyze raw data from SPR tasks to understand the impact of those techniques. Toward these ends, in Phase I, a sample of 104 studies that employed SPR tasks was collected and coded for different outlier treatments. As found in Marsden et al. (2018), wide variability was observed across the sample in terms of selection of time and standard deviation (SD)-based boundaries for determining what constitutes a legitimate reading time (RT). In Phase II, the raw data from the SPR studies in Phase I were requested from the authors. Nineteen usable datasets were obtained and re-analyzed using data transformations, SD boundaries, trimming, and winsorizing, in order to test their relative effectiveness for normalizing SPR reaction time data. The results suggested that, in the vast majority of cases, logarithmic transformation circumvented the need for SD boundaries, which blindly eliminate or alter potentially legitimate data. The results also indicated that choice of SD boundary had little influence on the data and revealed no meaningful difference between trimming and winsorizing, implying that blindly removing data from SPR analyses might be unnecessary. Suggestions are provided for future research involving SPR data and the handling of outliers in second language (L2) research more generally.

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Relationship between maxillary posterior molar roots and the maxillary sinus floor: Cone-beam computed tomography analysis of a western Chinese population

Journal of International Medical Research ◽

10.1177/0300060520926896 ◽

2020 ◽

Vol 48 (6) ◽

pp. 030006052092689

Author(s):

Jun Pei ◽

Jiyuan Liu ◽

Yafei Chen ◽

Yuanyuan Liu ◽

Xuejuan Liao ◽

...

Keyword(s):

Computed Tomography ◽

Maxillary Sinus ◽

Cone Beam Computed Tomography ◽

Chinese Population ◽

Root Apex ◽

Western China ◽

Cone Beam ◽

Posterior Teeth ◽

Second Molar ◽

Maxillary Molar

Objective This study aimed to assess the positional relationships between the maxillary sinus and the first and second molars in a western Chinese population by using cone-beam computed tomography. Methods This study included 212 patients (652 maxillary molars and 1956 roots). Patient demographics (sex and age) and cone-beam computed tomography data regarding the relationship between molar roots and the maxillary sinus were obtained. This relationship was stratified into four types for statistical analysis. Results Sex and side did not significantly influence the distance between maxillary molar roots and the maxillary sinus. However, the distance between maxillary molar roots and the maxillary sinus increased with age. The mesiobuccal root of the second molar was nearest to the maxillary sinus. The most common relationship type involved absence of root contact with the sinus border and presence of a maxillary sinus cross-section above the root apex. Conclusions Compared with other teeth, the maxillary posterior teeth have a complex anatomical structure and are closely related to the sinus. These findings may serve as reference information for root canal treatment, tooth extraction, dental implant, and other dental clinical procedures among patients in western China.

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CBCT Assisted Endodontic Management of Teeth for Aberrant Roots: Case Series

JOURNAL FOR CLINICAL AND DIAGNOSTIC RESEARCH ◽

10.7860/jcdr/2020/46470.14274 ◽

2020 ◽

Author(s):

Nandini Biradar ◽

Nithin Kumar Shetty ◽

Ruthika Naik ◽

Savita Chakote ◽

Ramakrishna Ravi

Keyword(s):

Three Dimensional ◽

Case Series ◽

File Systems ◽

Cone Beam ◽

Type I ◽

Postoperative Evaluation ◽

Posterior Teeth ◽

3D Images ◽

Root Canal Morphology ◽

Mandibular First Molar

Cone Beam Computed Tomography (CBCT) is a radiographic imaging technique which provides accurate, high-quality, three-Dimensional (3D) images of various parts of head and neck. They deliver images with a spatial resolution of teeth required for diagnosis, treatment planning and postoperative evaluation. The aim of this case series is to describe the importance of determining the root canal morphology with the help of CBCT. This case series presents the endodontic management of a three rooted maxillary first premolar, maxillary first molar with single palatal root and three canals and mandibular first molar with five canals using CBCT. The axial images from CBCT show Gulabivwala K Type I (3-1) canal pattern in distal root of mandibular first molar (36) and palatal root of maxillary first molar (26) according to Al-Quadah Awawdeh showed Type XXII (3-2-1) canal configuration. Biomechanical preparations of all the teeth were done with hand as well as rotary file systems and lateral compaction obturation technique was used. With the advancing technology in imaging, there are possibilities to detect and treat a number of variations particularly in posterior teeth leading to successful endodontic treatment.

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