scholarly journals The Relationship Between Incisor Crown Shape and Dental Crowding

2012 ◽  
Vol 12 (2) ◽  
pp. 344-349
Author(s):  
Khawla Awni
Keyword(s):  
Crown Shape ◽  
Dental Crowding ◽  
The Relationship

scholarly journals Understanding the Relationship Between Crown Shape and Size and Structural Complexity of Individual Trees

2020 ◽  
Author(s):  
Ninni Saarinen ◽  
Kim Calders ◽  
Ville Kankare ◽  
Tuomas Yrttimaa ◽  
Samuli Junttila ◽  
...  
Keyword(s):  
Structural Complexity ◽  
Crown Shape ◽  
Individual Trees ◽  
The Relationship ◽  
Shape And Size

scholarly journals The prevalence of malocclusion among 7–15-year-old Lithuanian schoolchildren

Medicina ◽  
2009 ◽  
Vol 45 (2) ◽  
pp. 147 ◽  
Author(s):  
Antanas Šidlauskas ◽  
Kristina Lopatienė
Keyword(s):  
Important Determinant ◽  
Age Groups ◽  
Epidemiological Data ◽  
Dental Arch ◽  
Class Iii ◽  
Posterior Crossbite ◽  
Normal Occlusion ◽  
Dental Crowding ◽  
Relationship Of ◽  
The Relationship

The epidemiological data on the prevalence of malocclusion is an important determinant in planning appropriate levels of orthodontic services. The occurrence of occlusal anomalies varies between different countries, ethnic and age groups. The aim of this study was to describe the prevalence of malocclusion among Lithuanian schoolchildren in the 7–9-, 10– 12-, and 13–15-year age groups assessing occlusal morphology. The study included 1681 schoolchildren aged 7–15 years. The crowding, spacing, overbite, overjet, the relationship of the first upper and lower molars according Angle’s classification, and posterior crossbite were assessed. The study demonstrated that only 257 children had normal occlusion, and 44 had undergone orthodontic treatment among them. The greatest overjet in the studied contingent was 11 mm, and the negative overjet – 3 mm. The overbite ranged between 0 and 6 mm with a mean of 2.29±1.23 mm. Posterior crossbite was recorded in 148 children (8.8%). This study showed that the prevalence of malocclusion among 7–15-year-old Lithuanian schoolchildren is 84.6%. The most common malocclusion was dental crowding. The upper dental arch crowding was registered for 44.1% and lower for 40.3% of all schoolchildren. The class I molar relationship was detected in 68.4% of the subjects, class II – in 27.7%, and class III – in 2.8%.

scholarly journals The relationship of the third molar to the anterior dental crowding

2004 ◽  
Vol 4 (1) ◽  
pp. 1-9
Author(s):  
Nada Al–Sayagh ◽  
Anas Mohammad ◽  
Luqman Ismail
Keyword(s):  
Third Molar ◽  
The Third ◽  
Dental Crowding ◽  
Relationship Of ◽  
The Relationship

Modelling crown shape of Piceaabies: spacing effects

1996 ◽  
Vol 26 (11) ◽  
pp. 1957-1966 ◽  
Author(s):  
Christine Deleuze ◽  
Jean-Christophe Hervé ◽  
Francis Colin ◽  
Luc Ribeyrolles
Keyword(s):  
Wood Quality ◽  
Branch Length ◽  
Resource Depletion ◽  
Height Growth ◽  
Experimental Plot ◽  
Mechanical Contact ◽  
Spacing Effects ◽  
Crown Shape ◽  
Length Increment ◽  
The Relationship

A model of branch length increment and inclination was developed for Piceaabies (L.) Karst. to describe the dynamics of crown shape. Four trees belonging to the provenance Istebna, from Poland, were sampled in an experimental plot where density varied continuously from 200 to 10 000 stems/ha. Sampling along the density gradient enabled us to study the effect of spacing on tree morphology and development. The model of branch extension is based on height growth and on the year of elongation of the branch. A second model describes the change in branch inclination. Branch spread increased with between-tree spacing, whereas branch inclination was affected by crown contact; competition was then divided into two components: (i) direct mechanical contact and (ii) global resource depletion. The sample trees were young (26 years), so height growth was mainly linear and the effect of apical control could not be tested. This study provides a simple model of crown shape development that can be used in a more detailed process-based model. Simulations are presented based only on height growth. For wood quality purposes, the relationship between branch diameter and branch length is provided to give access to the knottiness of the stem. The limitations of the sample are discussed in view of a more general use of these models.

The Relationship of the Lower Third Molar to the Anterior Dental Crowding

2014 ◽  
Vol 1 (2) ◽  
pp. 29-32
Author(s):  
Labeed S. Hasan ◽  
Maha I. Abdulazeez ◽  
Emad H. Abdulla
Keyword(s):  
Third Molar ◽  
Dental Crowding ◽  
Relationship Of ◽  
The Relationship

scholarly journals Prevalence of Dental Crowding in the Kabul Dental Hospital, Kabul-Afghanistan

2021 ◽  
Vol 2 (3) ◽  
pp. 34-36
Author(s):  
Ozair Erfan ◽  
Gulbahar Taka ◽  
Hosna Qaderyar
Keyword(s):  
Clinical Examination ◽  
Anterior Segment ◽  
Permanent Teeth ◽  
Systematic Random Sampling ◽  
Self Confidence ◽  
Steady Growth ◽  
Dental Hospital ◽  
Common Problems ◽  
Dental Crowding ◽  
The Relationship

Background: Dental crowding, also called overcrowding, is a condition in which there is not enough space in the mouth for the steady growth of permanent teeth. Common problems that crowding can cause for a person include difficulty chewing food, speech problems, tooth decay, enamel loss, premature tooth loss, pressure on the jaws and pain, gingival resorption, and tenderness. Crowding always creates an unpleasant appearance for a person and even causes a person to be isolated from society and reduce self-confidence due to an ugly appearance. Crowding raises serious functional and aesthetic concerns for many patients. Aims: Conduct a descriptive study in this field with 1000 patients of the (OPD) Outpatient Department of Kabul Dental Hospital on the prevalence of crowding and to finding the relationship between the incidence of crowding according to the upper and lower jaws and the anterior and posterior segments of each jaw. Methods and materials: The sampling method were systematic random sampling that 1000 people were randomly selected from all OPD service clients during nine months and were included in the study. The required information was obtained by clinical examination of patients above the dental unit, under adequate light and the kit of dental examination equipment with direct clinical examination of the patient, and a pre-prepared questionnaire was inserted. The information obtained from the questionnaire reached the coding page, and it was entered into IBM_SPSS-25 software, and its analysis was performed. Results: From the results of this study, it was found that the prevalence of crowding was 59.1%, with the highest incidence of 28.6% in the lower jaw. Also, the highest rate of crowding events was 44.9% in the anterior segment of the mandible. Crowding events were received in the upper jaw 12.7%, with the highest incidence of 29.3% in the anterior segment.

scholarly journals The Relationship Between Maxillary and Mandibular Base Lengths and Dental Crowding in Patients with True Class II Malocclusions

2020 ◽  
Vol 4 (7) ◽  
pp. OR5-OR9
Author(s):  
Tanzin Palkit ◽  
Isha Aggarwal ◽  
Yagyeshwar Malhotra ◽  
Mandeep Uppal ◽  
Merry Goyal ◽  
...  
Keyword(s):  
Inverse Correlation ◽  
Class Ii ◽  
Effective Length ◽  
Class Ii Malocclusion ◽  
Complete Class ◽  
Facial Beauty ◽  
Lateral Cephalograms ◽  
Pre Treatment ◽  
Dental Crowding ◽  
The Relationship

INTRODUCTION: Orthodontists, for a long time have considered that occlusion and facial beauty are so interdependent that they must be equal goals of treatment.AIM: To validate the relationship between maxillary and mandibular effective lengths and dental crowding in patients with Class II malocclusions. MATERIALS AND METHOD: A sample of 40 orthodontic patients with complete bilateral Class II malocclusions in the permanent dentition (25 males, 15 females) who were divided into two groups based on severity of pre-treatment mandibular anterior dental crowding. The maxillary and mandibular effective lengths and tooth-arch size discrepancies were measured on the pre-treatment Lateral cephalograms and initial casts, respectively. Intergroup comparisons of apical base lengths were assessed with independent t-tests. Correlation between effective length and dental crowding was assessed by Pearson's correlation coefficient (P <.05).RESULTS: Subjects with Class II malocclusion and moderate to severe crowding had significantly smaller maxillary and mandibular effective lengths compared with subjects without crowding and with minimal dental crowding. A weak inverse correlation was also found between maxillary and mandibular effective lengths and the severity of dental crowding. CONCLUSION: In patients with complete Class II malocclusion, decreased maxillary and mandibular effective lengths constitute a significant factor associated with dental crowding.

On the relationship between gingival morphotypes and different crown shape assessments in young Caucasians

2016 ◽  
Vol 20 (8) ◽  
pp. 2185-2190 ◽  
Author(s):  
Kai R. Fischer ◽  
Timo Richter ◽  
Anton Friedmann ◽  
Stefan Fickl
Keyword(s):  
Crown Shape ◽  
The Relationship

Interstellar gas in the central region of the Galaxy

1967 ◽  
Vol 31 ◽  
pp. 239-251 ◽  
Author(s):  
F. J. Kerr
Keyword(s):  
Central Region ◽  
Galactic Plane ◽  
Neutral Hydrogen ◽  
Continuum Emission ◽  
Galactic Centre ◽  
Interstellar Gas ◽  
Hydrogen Recombination ◽  
The Galaxy ◽  
Centre Region ◽  
The Relationship

A review is given of information on the galactic-centre region obtained from recent observations of the 21-cm line from neutral hydrogen, the 18-cm group of OH lines, a hydrogen recombination line at 6 cm wavelength, and the continuum emission from ionized hydrogen.Both inward and outward motions are important in this region, in addition to rotation. Several types of observation indicate the presence of material in features inclined to the galactic plane. The relationship between the H and OH concentrations is not yet clear, but a rough picture of the central region can be proposed.

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