Extraction of trabecular structures of mandible excluding tooth roots on dental panoramic radiographs using mathematical morphology

2006 ◽  
Author(s):  
A. Asano ◽  
T. Tambe ◽  
A. Taguchi ◽  
Chie Muraki Asano ◽  
T. Nakamoto ◽  
...  
Keyword(s):  
Mathematical Morphology ◽  
Panoramic Radiographs ◽  
Tooth Roots

Root Lengths in 47,XYY Males’ Permanent Teeth

2004 ◽  
Vol 83 (10) ◽  
pp. 771-775 ◽  
Author(s):  
R. Lähdesmäki ◽  
L. Alvesalo
Keyword(s):  
Y Chromosome ◽  
Sex Chromosome ◽  
Permanent Tooth ◽  
Permanent Teeth ◽  
Tooth Crown ◽  
Promoting Effect ◽  
Panoramic Radiographs ◽  
Tooth Roots ◽  
Root Dentin ◽  
Males And Females

Studies on individuals with sex chromosome anomalies have demonstrated the promoting effect of the Y chromosome on tooth crown enamel and dentin growth. The present research investigated permanent tooth root lengths in 47,XYY males. The measurements were made from panoramic radiographs. The results indicate longer tooth roots in 47,XYY males compared with those in control males and females. The promoting effect of the Y chromosome on dental growth thus continues in the form of root dentin after the completion of crown growth. The results, together with those on tooth crown sizes in 47,XYY males, suggest that growth excesses are evident and final, beginning a few months after birth and continuing up to the age of 14 years, at least. The excess root dentin growth in 47,XYY males, as well as sexual dimorphism in the growth of crown and root dentin, might be caused by the same factor on the Y chromosome.

scholarly journals Panoramic Dental Radiography Image Enhancement Using Multiscale Mathematical Morphology

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3110
Author(s):  
Julio César Mello Román ◽  
Vicente R. Fretes ◽  
Carlos G. Adorno ◽  
Ricardo Gariba Silva ◽  
José Luis Vázquez Noguera ◽  
...  
Keyword(s):  
Contrast Enhancement ◽  
Mathematical Morphology ◽  
Panoramic Radiography ◽  
Histogram Equalization ◽  
Dental Radiography ◽  
Panoramic Radiographs ◽  
Image Histogram ◽  
Multi Scale ◽  
Dental Radiographs

Panoramic dental radiography is one of the most used images of the different dental specialties. This radiography provides information about the anatomical structures of the teeth. The correct evaluation of these radiographs is associated with a good quality of the image obtained. In this study, 598 patients were consecutively selected to undergo dental panoramic radiography at the Department of Radiology of the Faculty of Dentistry, Universidad Nacional de Asunción. Contrast enhancement techniques are used to enhance the visual quality of panoramic dental radiographs. Specifically, this article presents a new algorithm for contrast, detail and edge enhancement of panoramic dental radiographs. The proposed algorithm is called Multi-Scale Top-Hat transform powered by Geodesic Reconstruction for panoramic dental radiography enhancement (MSTHGR). This algorithm is based on multi-scale mathematical morphology techniques. The proposal extracts multiple features of brightness and darkness, through the reconstruction of the marker (obtained by the Top-Hat transformation by reconstruction) starting from the mask (obtained by the classic Top-Hat transformation). The maximum characteristics of brightness and darkness are added to the dental panoramic radiography. In this way, the contrast, details and edges of the panoramic radiographs of teeth are improved. For the tests, MSTHGR was compared with the following algorithms: Geodesic Reconstruction Multiscale Morphology Contrast Enhancement (GRMMCE), Histogram Equalization (HE), Brightness Preserving Bi-Histogram Equalization (BBHE), Dual Sub-Image Histogram Equalization (DSIHE), Minimum Mean Brightness Error Bi-Histogram Equalization (MMBEBHE), Quadri-Histogram Equalization with Limited Contrast (QHELC), Contrast-Limited Adaptive Histogram Equalization (CLAHE) and Gamma Correction (GC). Experimentally, the numerical results show that the MSTHGR obtained the best results with respect to the Contrast Improvement Ratio (CIR), Entropy (E) and Spatial Frequency (SF) metrics. This indicates that the algorithm performs better local enhancements on panoramic radiographs, improving their details and edges.

EVALUATION OF OCCURRENCE OF HYPERDONTIA IN NON-SYNDROMIC POPULATION FROM BIHAR REGION

2019 ◽  
Vol 3 (10) ◽  
Author(s):  
Dr. Minti Kumari ◽  
Dr. Madhuri Kumari ◽  
Dr Anurag Rai ◽  
Dr. Navin Kumar
Keyword(s):  
Panoramic Radiograph ◽  
Permanent Dentition ◽  
Dental Anomalies ◽  
Supernumerary Teeth ◽  
Panoramic Radiographs ◽  
Future Studies ◽  
Asian Populations ◽  
Males And Females ◽  
The Individual ◽  
Clinical Records

It is evident that hyperdontia is more common in the permanent dentition than in the primary. There is a considerable difference between males and females in the prevalence of these teeth in permanent dentition; hyperdontia is twice as common in males as in females. However, this approximation varies in terms of location, other associating syndromes that may be present, and the ethnicity of the individual. In terms of ethnicity, it can be seen that hyperdontia is in fact less common in Caucasian than in Asian populations. There is evidence to show that an individual is more likely to have hyperdontia if other members of their family also have the condition. Hence the present study was planned for evaluation of occurrence of hyperdontia in non-syndromic  population from Bihar Region. The present study was planned in Public Health Dentistry, Patna Dental College and Hospital, Patna, Bihar. Total 195 patients referred to Department of Dentistry were evaluated in the present study. Panoramic radiographs and clinical records of patients above the age of 18 years and without any syndromic features were selected for the study.  All the radiographs were examined for the presence of supernumerary teeth, their location, morphology, and number. Morphologically, teeth were classified as conical, tuberculate, supplemental, and odontoma. Early diagnosis of dental anomalies can prevent some esthetic, orthodontic, and periodontal problems, and knowledge of the prevalence and distribution of the anomalies may help clinicians to the detection of these anomalies at early stages. Our study evaluated the prevalence of selected dental anomalies; future studies should investigate the prevalence of dental anomalies of all types. Keywords: Hyperdontia, non-syndromic, panoramic radiograph, supernumerary teeth, etc.

Applications of Mathematical Morphology to Range Imagery

1987 ◽  
Author(s):  
Thomas R. Esselman ◽  
Jacques G. Verly
Keyword(s):  
Mathematical Morphology

Estimating vibration transmission characteristics in tooth roots: A study.

1987 ◽  
Vol 31 (4) ◽  
pp. 907-915
Author(s):  
Eiichi Hanzawa ◽  
Hideaki Takehana ◽  
Akira Kimura ◽  
Minoru Toyoda ◽  
Etsuro Matsuo
Keyword(s):  
Transmission Characteristics ◽  
Vibration Transmission ◽  
Tooth Roots
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