Palatal rugae
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Palatal rugae are ridges on the roof of the mouth that have a unique pattern for each individual. These ridges are protected and seldom change with age or trauma. Different methods have been developed to analyze and compare rugae patterns for human identification purposes, including manual tracing and computer software programs. Studies have shown that rugae patterns can correctly identify individuals in about 97% of cases and may also be useful in determining a person's race or population, with some rugae shapes appearing more common in certain populations.
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Palatal rugae as an aid for personnel identification
The document summarizes a study on palatal rugae patterns in 1000 subjects in Lucknow, India. The key findings are:
1. Palatal rugae patterns were compared between males and females of different age groups. No significant differences were found in the number, size, or common shapes of rugae between genders.
2. The average number of rugae was highest in subjects ages 3-5 years and lowest in those over 51. Shape did not change with age, while size increased slightly until ages 13-30.
3. Comparisons of rugae patterns in twins, siblings, and parents revealed no familial similarities, suggesting rugae features are not inherited.
4. The
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The document summarizes a study on palatal rugae patterns in 1000 subjects in Lucknow, India. The key findings are:
1. Palatal rugae patterns were compared between males and females of different age groups. No significant differences were found in the number, size, or common shapes of rugae between genders.
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- Teeth can help determine characteristics like ethnicity, sex, and age due to their resistance to decomposition. Methods include examining tooth size, morphology, and DNA analysis.
- Dental identification plays an important role in mass disasters where victims are burned or bodies are fragmented, as teeth often survive decomposition better than other tissues. Standards are used to compare ante-mortem and post-mortem dental records.
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The document defines a bite mark as a physical alteration caused by contact with teeth. It discusses classifications of bite marks by agent, material, and etiology. Characteristics of human bite marks are described, including the circular/elliptical pattern with central bruising caused by upper and lower dental arches. Proper evidence collection following ABFO guidelines is outlined, including photography, saliva swabs, impressions, and tissue samples. Conclusions in bite mark analysis range from definite to not the biter based on matching characteristics.
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2) Results found that the computer assisted method had the highest number of moderate and excellent matching cases compared to the other techniques.
3) It is strongly recommended that forensic odontologists discontinue the subjective hand tracing methods and instead use the more reliable and accurate computer assisted overlay generation technique for bite mark analysis.
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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
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ashley howes analysis
boltons analysis
moyers mixed dentition analysis
tanaka johnson analysis
photographic analysis
hixon old father analysis
Clinical study of impacted maxillary canine in the Arab population in Israel
The objective of the present study was to determine the prevalence of impacted maxillary canine in patients in Arabs
Community in Israel (ARAB48,Israel) visiting our Center For Dentistry,Research & Aesthetics,Jatt,Almothalath,Israel,
4250 patients . This study comprises data from patients who attended the O.P.D.2200 patients between Jun. 2006 to Dec
2013. Patients were examined in order to detect the impacted maxillary canines by intraoral examination, palpation, dental
records and followed by radiographs. It was found that the prevalence of canine impaction was 0,8 % (N=4250), 1,6
(N=2200), 43,9 (N-82) in males and 1,1% (N=4250), 2,1 (N=2200), 56,1 (N-82) in females suggesting that prevalence of
impacted maxillary canines is more in females than males and it is statistically significant. The overall prevalence for
maxillary impacted canines was found to be 3,7 % (N=2200) which suggested that it is much higher than previous studies.
The results of this study were slightly different than other studies, while the dissimilarities may be attributed to the sample
selection, method of the study and area of patient selection, which suggest racial and genetic differences.
Clinical study of impacted maxillary canine in the Arab population in Israel
The objective of the present study was to determine the prevalence of impacted maxillary canine in patients in Arabs Community in Israel (ARAB48,Israel) visiting our Center For Dentistry,Research & Aesthetics,Jatt,Almothalath,Israel, 4250 patients . This study comprises data from patients who attended the O.P.D.2200 patients between Jun. 2006 to Dec 2013. Patients were examined in order to detect the impacted maxillary canines by intraoral examination, palpation, dental records and followed by radiographs. It was found that the prevalence of canine impaction was 0,8 % (N=4250), 1,6 (N=2200), 43,9 (N-82) in males and 1,1% (N=4250), 2,1 (N=2200), 56,1 (N-82) in females suggesting that prevalence of impacted maxillary canines is more in females than males and it is statistically significant. The overall prevalence for maxillary impacted canines was found to be 3,7 % (N=2200) which suggested that it is much higher than previous studies. The results of this study were slightly different than other studies, while the dissimilarities may be attributed to the sample selection, method of the study and area of patient selection, which suggest racial and genetic differences.
Mixed dentition analysis
This document discusses various methods of mixed dentition analysis used to predict the size of unerupted permanent teeth during childhood. It describes Moyer's, Tanaka Johnston, Hixon-Oldfather, Nance, Ballard and Wylie, and Huckaba methods. Each method uses dental casts and sometimes radiographs to measure erupted teeth and predict unerupted tooth sizes using regression equations or charts. The most accurate methods are Hixon-Oldfather and refinements like Staley-Kerber, but other methods may be more practical or applicable to different populations.
Incidence Of Canine Impaction In Palestinian
This study aimed to determine the prevalence of impacted maxillary canines in the Palestinian population visiting a dental center in Israel between 2006-2013. The researchers examined 4250 patient records and found an overall prevalence of impacted canines to be 3.7%, higher than previous studies. Specifically, the prevalence was 0.8% in males and 1.1% in females, suggesting a higher rate in females. Most impacted canines were palatally positioned. The results differed slightly from other studies, possibly due to differences in sample selection, study methods, and patient populations examined. Accurate assessment of an impacted canine's position is important to determine the appropriate treatment approach.
Show text (1)
This study analyzed 200 lateral cephalograms to categorize variations in soft palate morphology and measure soft palate dimensions. Nine types of soft palate morphology were observed, with Type 1 (leaf-shaped) being most common. Additional variants not fitting previous categories were also seen. Males had significantly longer and wider soft palates than females. Soft palate length increased significantly with age. The study aims to establish normal soft palate morphology for comparison with disease states and aid in treatment planning.
The curve of dental arch in normal occlusion
dentists, orthodontists and other experts in the past. While prevention and cure of dental diseases, surgical reconstitution to address teeth anomalies and research studies on teeth and development of the dental arch during the growing up years has been the main concerns across the past decades, in recent years, substantial effort has been evident in the field of mathematical analysis of the dental arch curve, particularly of children from varied age groups and diverse ethnic and national origins. The proper care and development of the primary dentition into permanent dentition is of major importance and the dental arch curvature, whose study has been related intimately by a growing number of dentists and orthodontists to the prospective achievement of ideal occlusion and normal permanent dentition, has eluded a proper definition of form and shape. Many eminent authors have put forth mathematical models to describe the teeth arch curve in humans. Some have imagined it as a parabola, ellipse or conic while others have viewed the same as a cubic spline. Still others have viewed the beta function as best describing the actual shape of the dental arch curve. Both finite mathematical functions as also polynomials ranging from 2nd order to 6th order have been cited as appropriate definitions of the arch in various studies by eminent authors. Each such model had advantages and disadvantages, but none could exactly define the shape of the human dental arch curvature and factor in its features like shape, spacing and symmetry/asymmetry. Recent advances in imaging techniques and computer-aided simulation have added to the attempts to determine dental arch form in children in normal occlusion. This paper presents key analysis models & compares them through some secondary research study.
Keywords
Dental Arch, Curve,Normal Occlussion
Do pre existing micro cracks play a role in the fracture resistance of roots ...
The document discusses a study that investigated whether pre-existing microcracks play a role in the fracture resistance of non-root filled mandibular incisors. Micro-CT was used to examine 60 teeth for microcracks. Teeth were then subjected to fracture testing. The results showed that 79% of teeth had microcracks, but the number of microcracks only explained 0.65% of the variance in fracture resistance. Most fractures did not correlate with microcrack location or position. The study concluded that there was no clear relationship between the presence of microcracks and fracture resistance of the teeth.
Relationship between dental arch width and vertical facial morphology in unt...
The objectives of this study were to investigate if a relationship exists between dental arch width and the vertical facial pattern determined by the steepness of the mandibular plane, and to examine the differences in dental arch widths between male and female untreated adults. Lateral cephalograms and dental casts were obtained from 185 untreated Caucasians and measurements of arch width and mandibular plane angle were taken. The results showed that male arch widths were significantly larger than females and that as the mandibular plane angle increased, arch width decreased for both males and females. It was concluded that dental arch width is associated with gender and facial vertical morphology.
Cephalometriy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
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Articulo
This study investigated changes in gingival margins and secondary tooth eruption over 8 years in adolescents and adults. Measurements were made on dental casts taken 2 and 10 years after orthodontic treatment. The results showed:
1) Adolescents and adults experienced apical displacement of the gingival margin around maxillary molars, and adolescents also experienced this around maxillary incisors. Displacement was greater in adolescents.
2) Both adolescents and adults experienced continued eruption of maxillary molars and incisors over the study period, with greater eruption in adolescents, especially around incisors.
3) In adolescents only, a correlation was found between secondary incisor eruption
KimFracture2016.pdf
This study analyzed 175 cracked teeth in patients over a 5-year period. The goals were to examine the characteristics and distribution of cracked teeth, evaluate the survival rate of teeth receiving root canal treatment (RCT), and identify prognostic factors. Most cracked teeth were in older patients and located in lower second molars. Intact teeth and those with class I restorations had higher crack incidence. Of the 88 teeth receiving RCT, the 2-year survival rate was 90%. Deeper probing depths (>6mm) were associated with significantly lower survival rates after RCT.
Clinical Study of Impacted Canine in the Arab
This study examined the prevalence of impacted maxillary canines in the Arab population in Israel. The researchers reviewed records of 4250 patients and found 82 cases of impacted canines, a prevalence of 3.7%. Females had a higher prevalence than males, at 1.1% versus 0.8%. Most cases were unilateral, with the left side being more commonly impacted. The results suggest racial and genetic factors may influence canine impaction rates, as this population had a higher prevalence than previous studies in other areas. Early diagnosis and treatment of impacted canines can help guide them into proper alignment and avoid more complex treatment needs.
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Clinical study of impacted maxillary canine in the Arab population in Israel
Clinical study of impacted maxillary canine in the Arab population in Israel
Clinical study of impacted maxillary canine in the Arab population in Israel
Clinical study of impacted maxillary canine in the Arab population in Israel
Do pre existing micro cracks play a role in the fracture resistance of roots ...
Do pre existing micro cracks play a role in the fracture resistance of roots ...
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Palatal rugae
- 2. Palatal rugae are ridges on the anterior part of the palatal mucosa on each side of the mid-palatine raphae, behind the incisive papilla. These asymmetric and irregular ridges are well protected by the lips, cheek, tongue, buccal pad of fat and teeth in incidents of fire and high-impact trauma. Rugae pattern, like teeth, are considered unique to an individual. They seldom change shape with age and reappear after trauma or surgical procedures.
- 3. Lysell Primary rugae (>5 mm) Secondary rugae (3–5 mm) Fragmentary rugae (2<3 mm) (Rugae < 2 mm is not taken into consideration).
- 4. Thomas and Kotze have further categorized the various patterns of primary rugae as branched, unified, cross-linked, annular, and papillary.
- 5. Kapali and associates, have grouped the rugae straight, curved, wavy and circular.
- 6. Identifying individuals from their teeth, either by comparison with antemortem dental records or to known DNA samples, has been elaborated. However, this approach is not practical in identifying the edentulous. A useful method of identifying edentate individuals is by examining the palatal rugae pattern. The rugae pattern on the deceased’s maxilla or maxillary denture may be compared to old dentures that may be recovered from the decedent’s residence, or plaster models that may be available with the treating dentist.
- 7. ANALYSIS OF RUGAE PATTERN Manually Manually traced rugae patterns from post- and antetmortem dentures on to clear acetate and then superimposed these tracings on photographs of plaster models. Similar palatal rugae pattern on casts obtained from old (A) and new (B) dentures.
- 8. Computer software program
- 9. Limson and Julian have developed a computer software program. The method used digitized images of the palate on which characteristic points were plotted on the medial and lateral extremities of all rugae. The plotted points were assessed by the software program and the information stored sequentially, corresponding to the pixel position. These researchers obtained up to 97% accuracy in identifying individuals in a simulated post- and antemortem comparison of the palatal rugae.
- 10. PALATAL RUGAE IN RACE IDENTIFICATION A recent study by Nayak and coworkers suggests that rugae patterns are also useful in identifying an individual’s population affinity or race. In particular, they examined straight, curved, wavy, and circular rugae shapes in populations originating from southern and western India and found significant differences in some of them. Straight rugae were more frequently found among southern Indians, curved rugae had greater incidence among Western Indians.
- 11. Based on rugae shape, they were able to correctly identify an individual’s population origin in 70% of cases. This study as well as other by Kapali and associates was unable to observe significant sex differences in rugae pattern.
- 12. THANK YOU