Topic
Rugae
About: Rugae is a research topic. Over the lifetime, 297 publications have been published within this topic receiving 4595 citations. The topic is also known as: ruga.
Papers published on a yearly basis
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Papers
TL;DR: In contrast to studies suggesting that rugae move forward with age, the majority of Aboriginal rugae that changed direction moved posteriorly, and there was a statistically significant association between rugae forms and ethnicity, straight forms being more common in Caucasians whereas wavy forms were more common Aborigines.
Abstract: The purpose of this study was to determine whether rugae patterns change with age and to compare the number and pattern of rugae in Australian Aborigines with those of Caucasians. For the longitudinal part of the study, serial dental casts of ten Aborigines, from 6 to 20 years of age, were examined and rugae patterns were recorded. To enable comparisons to be made between different ethnic groups an additional 100 dental casts of Australian Aborigines and 200 casts of caucasians, ranging in age from 13 to 17 years, were examined. Characteristics observed were number, length, shape, direction and unification of rugae. The length of rugae increased significantly with age but the total number of rugae remained constant. Thirty-two per cent of rugae showed changes in shape, while 28 per cent displayed a change in orientation. In contrast to studies suggesting that rugae move forward with age, the majority of Aboriginal rugae that changed direction moved posteriorly. Changes in rugae patterns have been assumed to result from palatal growth but alterations in pattern were observed in the Aboriginal sample even after palatal growth had ceased. The mean number of primary rugae in Aborigines was higher than in Caucasians, although more primary rugae in Caucasians exceeded 10 mm in length than in Aborigines. The most common shapes in both ethnic groups were wavy and curved forms, whereas straight and circular types were least common. There was a statistically significant association between rugae forms and ethnicity, straight forms being more common in Caucasians whereas wavy forms were more common Aborigines.
287 citations
TL;DR: The medial and lateral points of the third rugae appear to be stable landmarks for the construction of anatomic reference pints in longitudinal cast analysis, and there were no statistically significant anteroposterior changes observed in the nonextraction group over time.
Abstract: To determine whether the positions of the palatal rugae were affected by orthodontic therapy, pre- and posttreatment maxillary dental casts of 57 adult patients treated in the graduate orthodontic clinic at the University of North Carolina were evaluated. The orthodontic extraction group (n = 27) was composed of patients whose treatment included the extraction of two maxillary premolars. The remaining patients (n = 30) had been treated without extractions. Transverse changes observed over time were significantly different from zero only for the medial points of the first rugae in the nonextraction group and for the lateral points of the first rugae in the extraction group. None of the changes observed in the transverse measures were statistically different between the two groups. In the extraction group, there were significant anteroposterior changes in the right lateral points between the first and second rugae and between the second and third rugae, and in the right medial points between the second and third rugae. There were no statistically significant anteroposterior changes observed in the nonextraction group over time. When the two groups were compared, the average distance between the lateral first and second right rugae, and the average distance between the lateral second and third right rugae were significantly different. The medial and lateral points of the third rugae appear to be stable landmarks for the construction of anatomic reference pints in longitudinal cast analysis.
189 citations
TL;DR: The purpose of this investigation was to determine if palatal rugae can be relied upon for identification, and to draw the conclusions.
Abstract: Investigators have implied that palatal rugae are unique to each individual. However, these researchers have disagreed as to whether or not legal identification could be based solely on palatal rugae. Previous studies used poor duplicating materials and may not have considered the effects of growth, extractions, palatal expansion, or some combination of these. The inadvertent use of other features of the cast, such as teeth, edentulous ridge morphology, muscle attachments, vestibular depth, or some combination of these, to aid in the identification, may have influenced their results. The purpose of this investigation was to determine if palatal rugae can be relied upon for identification. Twenty-five orthodontic cases were selected with pre- and post-treatment casts; orthodontic treatment had taken eighteen to sixty months. One hundred casts were randomly selected as variables. All casts were trimmed so that all areas except for the rugae area of the hard palate were removed. The twenty-five post-orthodontic casts were dispersed within 100 randomly selected casts. Nine investigators were given the twenty-five pre-orthodontic casts and asked to compare them to the other one hundred and twenty-five casts for possible matches. Data were collected as to percentage of correct matches and time required for comparison. Each set of pre- and post-orthodontic casts was properly identified (100%) by 8 investigators, and the remaining investigator correctly matched 22 out of 25 casts (88%). These conclusions were drawn.(ABSTRACT TRUNCATED AT 250 WORDS)
171 citations
TL;DR: The analysis of the palatal rugae and their features can be used as a reliable guide to the forensic identification.
Abstract: SUMMARY: Establish a person's identity can be a very complex process, one of the main objectives of the forensic sciences.The analysis of the teeth, fingerprints and DNA comparison, are probably the most used technics, allowing fast and secure identificationprocesses. However, these techniques can not always be applied, in some cases, it is necessary to apply different and less known techniques.In this work, a systematic analysis of the shape and dimensions of the palatal rugae was performed. We analyzed 120 subjects of bothsexes, between 15 to 20 years olds, fully dentated, and by calcorrugoscopy were determined the shape, size, number and position of thepalatal rugae. The most prevalent palatal rugae shape was sinuous (43%) followed by curve (27%), line (15%), point (11%), and polymorphicvarieties (4%). The average number was 12.27, being higher in male than female. The palatal rugae that were larger were the sinuous(mean 9.58 mm). 40% of the rugae were found in the E quadrant, followed by D (30%), the rest was distributed among the other regions.The analysis of the palatal rugae and their features can be used as a reliable guide to the forensic identification.
138 citations
Journal Article•
TL;DR: A statistically significant association between the total number of rugae and the gender in both the study populations exists and parameters like the length and shape of the rugae show racial differences.
Abstract: Objectives To compare the palatine rugae pattern of Mysorean and Tibetan subjects, to assess the predominant palatine rugae pattern in Mysorean and Tibetan population, and to determine the uniqueness of palatine rugae pattern in an individual. Materials Maxillary study models of 60 subjects each (30 males and 30 females) of age group 17-23 years, of Mysorean population and Tibetan population were assessed for the length, shape, and unification of rugae based on the classification by Lysell et al. The palatine rugae were compared for the above mentioned parameters. 2 way ANOVA and Chi square tests were used for statistical analysis. Results Statistical analysis showed that males had significantly more number of total rugae on the right compared to the left side in both populations. Indian males had more primary rugae on the left side as compared to females and vice versa for the Tibetan population. Also, Indian males had more number of curved rugae on both right and left sides than Tibetan males and Tibetan females had more wavy rugae on right and left sides than Indian females. In other aspects, no significant difference or association was found. Conclusions A statistically significant association between the total number of rugae and the gender in both the study populations exists. Parameters like the length and shape of the rugae show racial differences.
119 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 16 |
| 2020 | 16 |
| 2019 | 13 |
| 2018 | 17 |
| 2017 | 20 |
| 2016 | 23 |