scholarly journals Assessments of Prevalence of Ponticulus Posticus, Atlas Posterior Arch Deficiency, Sella Turcica Bridging, Maxillary Canine Impaction, and Associations Among Them in 500 CBCTs of Italian Orthodontic Patients

2021 ◽  
Vol 2 ◽  
Author(s):  
Monica Macrì ◽  
Giada Perrella ◽  
Giuseppe Varvara ◽  
Giovanna Murmura ◽  
Tonino Traini ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Age Groups ◽  
Sella Turcica ◽  
Chronological Age ◽  
Posterior Arch ◽  
Maxillary Canine ◽  
Ponticulus Posticus ◽  
Chi Squared ◽  
Orthodontic Patients ◽  
The Right

Background: The ponticulus posticus (PP) is an important anomaly of the atlas (C1 vertebra) with a complete or partial bone bridge that transforms the groove of the vertebral artery (VA) into a canal (arcuate foramen). The aim was to retrospectively determine prevalence of PP evaluating morphological features and the possible association with other dentoskeletal anomalies in the midface and neck area such as maxillary canine impaction (MCI), atlas posterior arch deficiency (APAD), and sella turcica bridging (SB).Methods: This study was conducted in the Department of Medical, Oral and Biotechnological Sciences of the University “G. D'Annunzio” in Chieti. The detection of PP was performed on 500 patients with cone beam CT (CBCT) images (6 to 87 years).Results: Analysis revealed the presence of uni- and bi-lateral PP in 110 patients (22%): 24 (4.8%) patients with bilateral complete PP, 12 (2.4%) patients with complete PP on the left, 6 (1.2%) patients with complete PP on the right, 8 (1.6%) patients with complete PP on the right and partial PP on the left, 6 (1.2%) patients with complete PP on the left and partial PP on the right, 26 (5.2%) patients with partial bilateral PP, 18 (3.6%) patients with partial left PP, and 10 (2%) patients with partial PP on the right. The Chi-squared statistic confirmed that there are significant associations between MCI and PP (p = 0.020) and between SB and MCI (p <0.00001). No correlation between chronological age and presence of the PP (p = 0.982), between chronological age and morphotypes of the PP (p = 0.779), between APAD and the PP (p = 0.0757), between SB and the PP (p = 0.111), and between APAD and MCI (p = 0.222) were found.Conclusion: This observational study showed how bilateral partial variant and bilateral complete variant are the most represented morphotypes in all the age groups. The prevalence of MCI is positively associated with PP and with SB.

scholarly journals The Prevalence of Skeletotopy Variation of the Atlas and Vertebral Arteries Among Lithuanians and Its Significance for Physical Medicine Procedures and Rehabilitation

2019 ◽  
Vol 1 (12) ◽  
Author(s):  
Rimvydas Stropus ◽  
Ernesta Naujokaitė ◽  
Ieva Sakalauskaitė
Keyword(s):  
Risk Factor ◽  
Vertebral Artery ◽  
Anatomical Variations ◽  
The Elderly ◽  
Posterior Arch ◽  
Age Group ◽  
Physical Medicine ◽  
Ponticulus Posticus ◽  
Lateral Cephalograms ◽  
Orthodontic Patients

Research background. Vertebral artery relation with atlas anatomical variations can lead to sensomotor disorders of head and neck, and vertebrobasilar insuffciency. Kimmerle’s anomaly, a bony ring around vertebral artery, is also known as a risk factor for physical medicine procedures. To the best of our knowledge, this is the frst study of Ponticulus posticus prevalence in Lithuania. Aim. The research aim was to investigate the prevalence of skeletotopy variations of the posterior arch and vertebral artery among Lithuanian orthodontic patients of various ages and both genders. Research methods. We randomly selected 870 digital lateral cephalograms of Lithuanian orthodontic patients of various ages and both genders. 706 images with good visualization of VA bony socket shadow on the superior surface of the atlas posterior arch were chosen for the investigation. According to the degree of depth of the bony socket we categorized them into three variations: sulcus, groove and bony ring. If contours around VA of bony arch were equal or greater than 180°, we included those cases into the group of bony groove. Research results. We estimated predominance of sulcus (67.6%) of bony socket variations. A bony groove of various depths was found in 24.0% and a bony ring was found in 7.5% of the subjects studied. Vertebral artery groove was found to be more prevalent in females than in males and bony ring was more common in males than in females, but there was no signifcant difference (p > 0.05). Statistically signifcant predominace of bony ring in the age group of 17–20 years (13.2%) was observed and it was higher than in the age group of 8–16 years (5.1%) (p < 0.05). Conclusions. 1. Variations of bony socket including sulcus, groove, and bony ring (Kimmerle’s anomaly) develop in adolescence when ossifcation is most active. 2. The bony ring and semi open groove, which limit mobility of distal part of the vertebral artery, can be a risk factor of physical medicine procedures, especially in the elderly, whose artery walls are less elastic.Keywords: Ponticulus posticus, Kimmerle’s anomaly, atlas, vertebral artery, manual therapy of neck.

Gingival thickness assessment at mandibular incisors of orthodontic patients with ultrasound and cone-beam ct.

2019 ◽  
Author(s):  
Dimitrios Kloukos ◽  
Lydia Kakali ◽  
George Koukos ◽  
Anton Sculean ◽  
Andreas Stavropoulos ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Cone Beam ◽  
Point Estimate ◽  
Central Incisor ◽  
Gingival Thickness ◽  
Significant Difference ◽  
Orthodontic Patients ◽  
Clinically Significant ◽  
The Right ◽  
Mandibular Incisors

Abstract Background Quantitative and qualitative analysis of several periodontal parameters plays an important role in several dental procedures. Aim of the current study was to assess gingival thickness (GT) at mandibular incisors of orthodontic patients with two methods and determine how these methods are compared to each other when assessing periodontal anatomy through soft tissue thickness.Methods The sample consisted of 40 consecutive adult orthodontic patients. GT was measured at both central mandibular incisors, mid-facially on the buccal aspect, 2mm apically to the free gingival margin with two methods: a) clinically with an Ultrasound device (USD) and b) radiographically with Cone Beam Computed Tomography (CBCT).Results CBCT measurements were consistently higher than USD measurements, with the difference ranging from 0.13 mm to 0.21 mm. No difference was noted between the repeated CBCT measurements at the right central incisor (Bias= 0.05 mm; 95% CI= -0.01, 0.11, p=0.104). Although the respective results for the left incisor indicated, statistically, that the measurements were not exactly replicated, the magnitude of the point estimate was small and not clinically significant (Bias= 0.06 mm; 95% CI= 0.01, 0.11, p=0.014). Small differences between CBCT measurements made by the 2 examiners at the left central incisor (bias= 0.06 mm, 95% CI= 0.01, 0.11, p=0.014) were detected. However, this difference was minor, and again, not clinically significant. The respective analysis on the right incisor showed no significant difference (bias= 0.05 mm, 95% CI= -0.01, 0.11, p=0.246).Conclusions Present data indicate that CBCT measurements were highly reproducible and yielded greater values compared to USD measurements.

scholarly journals Association between Anatomical Variations and Maxillary Canine Impaction: A Retrospective Study in Orthodontics

2020 ◽  
Vol 10 (16) ◽  
pp. 5638
Author(s):  
Marco Pasini ◽  
Maria Rita Giuca ◽  
Sara Ligori ◽  
Stefano Mummolo ◽  
Fabiana Fiasca ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Sella Turcica ◽  
Logistic Models ◽  
Test Group ◽  
Anatomical Variations ◽  
Control Group ◽  
Posterior Arch ◽  
Maxillary Canine ◽  
Chi Square ◽  
Significant Difference

This study aims to evaluate whether or not there is a higher prevalence of skeletal abnormalities in subjects with maxillary canine impaction (MCI). This retrospective study was performed on 67 subjects with maxillary canine impaction (test group) and on 67 patients without dental displacement (control group). Sella turcica bridging (SB), ponticulus posticus (PP), atlas posterior arch deficiency (APAD) and the morphology of sella turcica and pterygopalatine fissure were evaluated on lateral cephalometric radiographs. Statistical analysis was performed using chi-square, Mann–Whitney test and multivariate logistic models; the level of significance was p < 0.05. Results showed that in the test and control groups 87% and 62.7% of patients had SB, respectively. PP was observed in 60% of patients in the test group and in 16.4% of patients in the control group. APAD was observed in 9% of test group and in 4.5% of the control group. Skeletal anomalies were significantly increased (p < 0.05) in subjects with MCI. A significant difference between the groups was observed in regards to the shape of the pterygopalatine fissure, found to be less wide and longer in the test group. SB, PP and APAD were higher in subjects with MCI; furthermore, an elongated pterygopalatine fissure was significantly associated with MCI.

scholarly journals The Effect of Partial Corticotomy on the Rate of Maxillary Canine Retraction: Clinical and Radiographic Study

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4837
Author(s):  
Hosam Baeshen
Keyword(s):  
Radiographic Study ◽  
Kingdom Of Saudi Arabia ◽  
Maxillary Canine ◽  
Premolar Extraction ◽  
Canine Retraction ◽  
Control Side ◽  
Dental Clinics ◽  
Orthodontic Patients ◽  
The Right ◽  
Age Range

The study aimed to evaluate, clinically and radiographically, the effect of partial corticotomy of the buccal plate distal to the canine on the rate of maxillary canine retraction. A clinical trial with the split-mouth design was conducted among twenty orthodontic patients, recommended for first premolar extraction with an age range from 13 to 21 years, selected from patients seeking orthodontic treatment in private dental clinics in Jeddah, Kingdom of Saudi Arabia. After extraction of the maxillary right and left first premolar, partial corticotomy was performed distal to the canine on the right side. The canine retraction was carried out with a power chain on both sides extended between the canine and the maxillary first molar. The data collected from the current study were tabulated and statistically analyzed using an independent sample t-test with p < 0.05 considered statistically significant. The rate of canine retraction was significantly higher on the corticotomy side than the control side (p < 0.05). Under the limitations of the present study, it can be concluded that the technique of partial corticotomy of the buccal plate distal to the canine is a straightforward surgical procedure enhancing the rate of canine retraction significantly.

scholarly journals Cervicovertebral anomalies and/or normal variants in patients with congenitally bilateral absent maxillary lateral incisors:

2020 ◽  
Vol 90 (3) ◽  
pp. 383-389 ◽  
Author(s):  
Taner Ozturk ◽  
Aykan Onur Atilla ◽  
Ahmet Yagci
Keyword(s):  
Significant Relationship ◽  
Sella Turcica ◽  
Control Group ◽  
Posterior Arch ◽  
Exact Tests ◽  
Normal Variants ◽  
Skeletal Anomalies ◽  
Ponticulus Posticus

ABSTRACT Objective To determine whether there is a relationship between congenitally bilaterally absent maxillary lateral incisors (BAMLIs) and skeletal anomalies and/or normal variants. Materials and Methods The records of 86 patients (62 girls, 24 boys; age 12–17 years) with congenitally BAMLIs and 86 patients (55 girls, 34 boys; age 13–18 years) without any dental or skeletal anomalies were collected and evaluated retrospectively. The study was based on the evaluation of lateral cephalometric and orthopantomographic radiographs. Posterior arch deficiency of the atlas bone (PADA); atlanto-occipital ligament calcification, known as “ponticulus posticus” (PP); and interclinoid ligament calcification, known as “sella turcica bridging” were recorded for each participant. Pearson χ2 and Fisher exact tests were used to evaluate and compare skeletal anomalies and/or normal variants between patients with BAMLIs and the control group. Results The prevalence of cervicovertebral anomalies and/or normal variants seen in the lateral cephalometric radiographs was higher in patients with BAMLI than in the control group. The prevalence of PP was lower and that of PADA was higher in patients with BAMLIs than in the control group (P &lt; .05). Conclusion The prevalence of PADA was increased and that of PP formation was decreased in patients with BAMLIs. There was a significant relationship between skeletal anomalies and/or normal variants.

Third-Molar Agenesis among Patients from the East Anatolian Region of Turkey

2010 ◽  
Vol 11 (4) ◽  
pp. 33-40 ◽  
Author(s):  
Fatih Kazanci ◽  
Mevlut Celikoglu ◽  
Ozkan Miloglu ◽  
Husamettin Oktay
Keyword(s):  
Third Molar ◽  
Third Molars ◽  
Congenital Deformities ◽  
Third Molar Agenesis ◽  
Significant Difference ◽  
Chi Squared ◽  
Orthodontic Patients ◽  
Molar Teeth ◽  
Spss Software ◽  
The Right

Abstract Aim The aim of this study was to determine the frequency and distribution of third-molar agenesis in orthodontic patients from the East Anatolian Region of Turkey. Methods and Materials Our data were obtained from the panoramic radiographs of the 2,579 patients 12 to 16 years of age in the Department of Orthodontics at the Atatürk University in Erzurum, Turkey. Subjects with congenital deformities, such as a cleft palate, were excluded from the study. Statistical analysis was performed using SPSS software and a chi-squared test. Results Of the 2,579 subjects, 1,964 (76.2 percent) had all four third-molar teeth, 238 (9.2 percent) had three, 214 (8.3 percent) had two, 66 (2.6 percent) had one third molar, and 97 (3.8 percent) had agenesis of all third-molar teeth. There was no significant difference in agenesis of third-molar teeth between the right and left sides and no gender predilection was noted. However, significantly more third-molar teeth were found to be missing from the maxilla compared to the mandible, with a ratio of approximately 1.5:1. Conclusion According to our results, the absence of one third molar is the most frequently detected pattern in the East Anatolian population. Additionally, the absence of third molars is more frequent in the maxilla than the mandible. Clinical Significance To date no information about third-molar agenesis in the East Anatolian population from Turkey is documented. This is believed to be the first known study on this subject in this population. Citation Kazanci F, Celikoglu M, Miloglu O, Oktay H. Third-Molar Agenesis among Patients from the East Anatolian Region of Turkey. J Contemp Dent Pract [Internet]. 2010 July; 11(4):033-040. Available from: http://www.thejcdp. com/journal/view/volume11-issue4-kazanci

THE SENSITIVITY OF ANIMALS OF DIFFERENT AGE GROUPS TO ISONIAZID IN A TOXICOLOGICAL EXPERIMENT

2016 ◽  
pp. 36-43
Author(s):  
K. I. Usov ◽  
T. A. Guskova ◽  
G. G. Yushkov ◽  
A. V. Mashanov
Keyword(s):  
Age Groups ◽  
Chronological Age ◽  
Experimental Investigations

The article reports results of experimental investigations into the sensitivity of rats of different chronological age to the antituberculosous preparation «Isoniazid». A different rats sensitivity in relation to age is shown.

scholarly journals A CBCT Based Three-Dimensional Assessment of Mandibular Posterior Region for Evaluating the Possibility of Bypassing the Inferior Alveolar Nerve While Placing Dental Implants

Diagnostics ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 406 ◽  
Author(s):  
Mohammed G. Sghaireen ◽  
Kumar Chandan Srivastava ◽  
Deepti Shrivastava ◽  
Kiran Kumar Ganji ◽  
Santosh R. Patil ◽  
...  
Keyword(s):  
Nerve Injury ◽  
Age Groups ◽  
Inferior Alveolar Nerve ◽  
Three Dimensions ◽  
High Rate ◽  
Cortical Plate ◽  
Computed Tomography Images ◽  
Group I ◽  
Linear Distance ◽  
The Right

A high rate of nerve injury and related consequences are seen during implant placement in the posterior mandibular arch. An approach has been proposed to avoid nerve injury by dodging the inferior alveolar nerve (IAN) while placing an implant. A prospective study with a total of 240 CBCT (cone beam computed tomography) images of patients with three dentate statuses, namely, edentulous (group I), partially edentulous (group II) and dentate (group III) were included in the study. The nerve path tracing was done on CBCT images with On-demand 3D software. The three dimensions, i.e., the linear distance from the outer buccal cortical plate to the inferior alveolar nerve (BCPN), linear distance from the outer lingual cortical plate to the inferior alveolar nerve (LCPN) and linear distance from the midpoint of the alveolar crest to the inferior alveolar nerve (ACN) were assessed. The data were presented and analyzed between variables using one-way ANOVA and independent t-test in SPSS version 21.LCPN of the right 1st premolar region (p < 0.05) was significantly different among the groups with edentulous subjects recorded with the minimum value (6.50 ± 1.20 mm). Females were found to have significantly (p < 0.05) less available bone (6.03 ± 1.46 mm) on the right side of the mandibular jaw compared to males in edentulous group of patients. On comparing age groups for partially edentulous subjects, LCPN of the right 1st premolar region had significantly (p < 0.05) less available bone (6.03 ± 0.38 mm) in subjects with age ≥54 years. The IAN follows a lingual course in the molar region and later flips to the buccal side in the premolar region. The LCPN dimension in the 1st and 2nd premolar region was found to be more than 6 mm irrespective of age, gender and side of the jaw. Thus, it can be considered as a suitable site for placing implants while bypassing the IAN with CBCT assessment remaining as the mainstay in the pre-surgical phase.

scholarly journals Frequency-Following Response (FFR) in Military Pilots

2020 ◽  
Author(s):  
Graziela Maria Martins-Moreira ◽  
Alessandra Spada Durante
Keyword(s):  
Pure Tone Audiometry ◽  
Control Group ◽  
Study Group ◽  
Aircraft Accidents ◽  
Frequency Following Response ◽  
Significant Difference ◽  
Qualitative Variables ◽  
Chi Squared ◽  
The Right ◽  
Military Pilots

Abstract Introduction Good hearing in pilots, including central auditory skills, is critical for flight safety and the prevention of aircraft accidents. Pure tone audiometry alone may not be enough to assess hearing in the members of this population who, in addition to high noise levels, routinely face speech recognition tasks in non-ideal conditions. Objective To characterize the frequency-following response (FFR) of a group of military pilots compared with a control group. Methods Twenty military pilots in the Study Group and 20 non-pilot military personnel, not exposed to noise in their work, in the Control Group, all with normal hearing, aged between 30 and 40 years old, completed a questionnaire to assess their hearing habits, and their FFRs were measured with a /da/ syllable (duration 40 milliseconds, speed 10.9/s), at 80 dB NA in the right ear. All procedures were approved by the ethical committee of the institution. Statistical analysis was performed using the t-Student or Mann-Whitney tests for quantitative variables, and the Fisher or chi-squared tests for qualitative variables, and a value of p < 0.05 was considered to be statistically significant. Results There was no significant difference between the groups regarding auditory habits. In the FFR, wave amplitudes A (p = 0.01) and C (p = 0.04) were significantly lower in the Study Group. Conclusion Working as a military pilot can be a crucial factor in determining an individual's typical FFR pattern, demonstrated in the present study by statistically significant reductions in the amplitudes of the A and C waves.

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