A study of lip print patterns among adults of Sebha city, Libya

Abstract Human identification is one of the most challenging sciences. Recently, study of lip prints has become slightly fashionable in forensic field. The aim of the present work is to determine the pattern of lip prints and evaluate its uniqueness in a sample of Egyptian population. The study included 955 subjects (2–65 years old). Lip prints were taken by direct rolling methods against hard background and each lip print was divided into six areas to be examined by magnifying hand lens. Thereafter, they were scanned and examined by the Microsoft office picture manager program. The results revealed that the lip print for each individual was unique and the complete vertical pattern was the commonest type among males and females living in Dakahlia Governorate, Egypt. Sex could not be differentiated from the lip print. It can be concluded that lip print analysis is an ancillary tool for personal identification especially in criminal investigations.

Asian Journal of Medical Sciences

Background: Lip prints are considered as very useful and are to be important forms of transfer evidence like finger prints. Studies have shown that even lip prints are unique for an individual and hence have the potential for personal identification. Aims and Objectives: To correlate the distribution of lip print pattern and its gender wise predominance. Material and Methods: The study comprised of 100 Nepalese medical students (50 males; 50 females). A photographic method was adopted rather than the old traditional lipstick method. The photographed lip prints were transferred into a computer to identify the character/lip print pattern. Statistical analysis was done using the SPSS (version 23.0) software package and Chi-square test was applied to evaluate the existence of correlation of lip print pattern with gender. Results: Type- II lip print pattern was frequently observed in all the four quadrants of both the sexes. This was followed by in order Type-I’>Type-I> Type-IV and...

Objective: The aim was to underline the significance of lip prints in forensic investigation for identification, to document common lip-print patterns, to analyze and evaluate them in relation to the gender from the population under study. Materials and Methods: The present study was conducted on 150 Nepalese medical students, of which 75 were males and 75 were females with age ranged from 18 to 25 year-old, of Universal College of Medical Sciences and Teaching Hospital, Bhairahawa. After applying lipstick evenly, the glue portion of cellophane tape was used to obtain the impression of the lip, which was transferred on to a white bond paper. The data were compiled and analyzed using Z-test for proportion to assess gender differences in lip-print patterns and P < 0.05 was considered to indicate statistical significance. Results: No two individuals had similar lip print pattern, the most frequent pattern was Type I (48%), followed by Type II (31%). The predominant pattern of lip print in males was clear-cut grooves running vertically across the lip (75%) and that in females were branched grooves (56%). Type I, Type II, and Type V lip print patterns were significantly associated with sex (P < 0.001) hence can be used in the identification of gender among the suspects in defined cohort. Conclusion: This loom of gender and individual identification utilizing lip prints is pertinent in defined group and the authors recommend the practical utilization of this technique, which is virtually absent in Nepali medico-legal system, in routine civil and criminal litigations.

Journal of Forensic and Legal Medicine, 2014

Lip-print groove patterns have recently been verified as a unique parameter for identification. This study investigated the stability of lip-print patterns over time to validate their secure use in civil and criminal investigations. One hundred and sixteen female lip prints were analyzed and compared with the prints of the same subjects taken 3 years earlier. The old and new lower lip prints of each subject were examined for similarities in the groove patterns in different areas of the lip (lower right, lower middle and lower left), and a score for similarity was developed for the statistical analysis of the lower lip stability data. No significant difference in the frequency of pattern types was detected between old and new prints (P > 0.05). Statistically, 89.6% of subjects showed characteristic typical groove(s) in the lip area(s) of the old and corresponding new prints: 24.1% in the three areas, 48.3% in two areas and 17.2% in one area. This study proves the lasting stability of lip-print patterns over the years in Saudi females and recommends paying attention to the presence of characteristic typical grooves in these prints. Further studies on larger samples, including male prints, should be performed to validate the lip prints for criminal use.

https://ijshr.com/IJSHR_Vol.4_Issue.2_April2019/IJSHR_Abstract.005.html, 2019

The imprint produced by the lip is termed as “lip print”, cheiloscopy is a forensic investigation technique deals with identification of humans based on lips traces. Lip prints have a good potential for use in identification. They are unique and do not change during the life of a person, and invariable and permanent. The aim of this study was to determine the most common lip pattern found among Aden- Yemeni population. Materials and Methods: Lip prints of 84 students Aden population, including (37 males and 47 females) 3 pair identical twins, red lip sticks, was applied and recorded on a plain white paper. Lip print has visualized with magnifying lens. After divided lip into six areas. Suzuki and Tsuchihashi’s classification has used to define the lip patterns and the data have statistically analyzed. Result : Every individual has unique lip print, Type II (43.8%)appears to be the most predominant pattern in both males and female, In male, the order of appearance of patterns were Type II, followed by type III, type I, type I' ,type IV and V patterns. While in female Type II followed by type I, type III, type V, type IV and type I' patterns, no significant difference was observed between the lip print patterns of males and females in different lip areas. Conclusion: Type II the most common lip pattern among Aden population and not related to sex determination. Keywords: Cheiloscopy, lip print, forensic odontology, gender, Aden, Yemeni

Journal of Oral Biology and Craniofacial Research, 2011

Background: Establishing a person's identity is a very important process in civil and criminal cases. Dental, fingerprint and DNA comparisons are probably the most common techniques allowing fast and secure identification processes. However, in certain circumstances related to the scene of the crime or due to lack of experienced personnel, these techniques might be unavailable; so there is still an increasing need for reliable alternative methods of establishing identity. Objective: The objective of the study was to check for any peculiar lip patterns in relation to the sex of the individual and determine the most common lip patterns in the given population. Materials and Methods: This study was conducted on 150 subjects, which included 75 males and 75 females, in the age group of 18-30 years. After applying lipstick evenly, the lip print of each subject was obtained on a simple bond paper by a researcher, and later the lip print was then analyzed and interpreted. Results: The intersected type was most commonly seen in females and branched in males. Reticular pattern was the least common type in both males and females. Conclusion: This study shows that the lip prints are unique to an individual and behold the potential for recognition of the sex of an individual.

Aim: To determine association of lip prints pattern among the male female MBBS 3rd year students. Study design: Cross sectional study Place and duration of study: The present study was conducted in the Avicenna Medical College Lahore in the department of Forensic medicine and Toxicology from to April 2012. Methods: Lip prints were collected from the subjects after obtaining their informed consent in the month of February-April 2012. A total of 100 MBBS, 3rd year students of the Avicenna Medical College Lahore participated in the study. Lip prints were recorded on a white paper and each lip print was assigned by their serial numbers and roll no. of student. Patterns of lip prints were classified according to Suzuki and Tsuchihashi classification. Results: The most common pattern among the students was Type-I or long vertical grooves (60%), and 2nd most common pattern was Type-II or Branching grooves(20%), 3rd common pattern was Type –II short vertical grooves (8%) was found. The least common lip print patterns Type-III and type-IV were found and very least pattern of lip print was other type grooves or type-V. Conclusion: Lip print pattern is unique for each of the examined individual. This finding is hoped to be useful in the identification process, both in civil and criminal cases. The most common pattern of lip prints was long Vertical groove or Type-I , and the second common pattern was the Type-II Branching grooves. Second least common pattern which were found to the type-III and type-IV and Very least pattern of lip print were found to be other type grooves or type-V. There is no any significant association of lip prints between males and females was found. .Keywords: Cheiloscopic variation, lip prints, tsuchihashi classification

The Professional Medical Journal, 2022

Objective: To assess for any peculiar lip prints in relation to the lip shapes of individual, and determine the most common lip print type among the members of biological families. Study Design: Descriptive study. Setting: Department of Forensic Medicine & Toxicology, Women Medical & Dental College, Abbottabad. Period: January 2018 to June 2018. Material & Methods: A total of 216 individuals (father, mother, both children’s), who underwent descriptive study of lip impression collection without any anesthesia or drug, were enrolled into the present study. Father, mother and two babies of each family were selected. Lip prints of Father, mother and both babies of each family were recorded. Each lip of 54 offspring’s was compared with the corresponding lip of his/her father mother and other baby. The segments of each lip of the offspring’s that matched/ resembled with either of father mother and biological babies were recorded. Results: Out of 54-total families, biological babies of 19(...

International Journal of …, 2010

Background: In forensic identification, the mouth allows for a myriad of possibilities. The use of lip prints is not so popular but exists as a methodology in forensic science. Hence Dental surgeon has to actively play his role in personal identification and criminal investigation, as his evidence would be very much useful in law and justice. Objective: The objective of present study was to evaluate in depth the lip print patterns in relation to gender, its consistency for a period of time, to ascertain whether there is any hereditary pattern in lip prints among families with siblings and twins, and thereby, to investigate whether the lip prints are unique to any blood group in the population under investigation. Materials and Methods: This study was conducted on 100 students and 10 family with children and twins respectively. The lip-print of each subject was obtained on a microscopic glass slide without applying anything and developed with carbon powder dusting with ostrich brush. Blood group information was noted. Results: Our study showed, in boys, the Type I (complete vertical), in girls, Type II (branched) and among both, type II (branched) lip print pattern to be most prominent pattern. The present study showed a good consistency of the lip print pattern when observed for a period of six months consecutively. The study has not found any statistical correlation of lip print with family members or even any correlation between blood group and lip prints. Conclusion: Although lip print identification has been utilized in the court of law in isolated cases, more research needs to be conducted in this field, with regard to confirmation of its uniqueness. Hence chelioscopy has to be carried out in depth on larger sample size using newer scientific technologies.