|Year : 2017 | Volume
| Issue : 3 | Page : 195-199
Genetic association in chronic periodontitis through dermatoglyphics: An unsolved link?
Sowmya Astekar1, Vineet Garg2, Madhusudan Astekar2, Ashutosh Agarwal2, Aditi Murari2
1 Department of Oral Medicine and Radiology, Institute of Dental Sciences, Bareilly, Uttar Pradesh, India
2 Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Bareilly, Uttar Pradesh, India
|Date of Submission||20-Sep-2016|
|Date of Acceptance||09-Nov-2017|
|Date of Web Publication||20-Nov-2017|
Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Bareilly, Uttar Pradesh
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Introduction: Because dermatoglyphic features are strongly affected by genetic and environmental factors, using it as supportive evidence in the diagnosis of hereditary disorders becomes a reality. Offspring of patients suffering from chronic periodontitis have a high prevalence rate of periodontal breakdown, suggesting strong familial influence. Aims: The present study intends to evaluate and compare the dermatoglyphic patterns in controls and periodontally compromised patients. Settings and Design: A hospital based cross-sectional study was conducted, including a total of 60 individuals, divided into study and control groups of 30 each. The study group included clinically diagnosed periodontitis patients.Materials and Methods: The digital prints were collected using biometric scanner and palmer prints using digital flatbed scanner. Care was taken to ensure that full prints of ridges were obtained. The periodontal status of all 60 participants was assessed clinically for attachment level and pocket depth. Later, Russell's periodontal index was also calculated. Statistical Analysis: The data obtained was subjected to statistical analysis using chi square and Student's t-test. Results: Among the finger ridge patterns, whorl pattern was found to be the most common in the study group whereas loop pattern was the most common in the control group. Mean total finger ridge count in the study group (165.69 ± 25.30) was significantly higher (P = 0.001) than the control group (125.4 ± 16.38). Mean dat angle was significantly higher (P = 0.039) in the study group (60.60 ± 2.76) than the control group (59.20 ± 2.62). Conclusion: Dermatoglyphics may serve as an early predictor in identifying high risk group individuals of developing diseases like periodontitis.
Keywords: Biometric, dermatoglyphics, genetics, periodontitis
|How to cite this article:|
Astekar S, Garg V, Astekar M, Agarwal A, Murari A. Genetic association in chronic periodontitis through dermatoglyphics: An unsolved link?. J Indian Acad Oral Med Radiol 2017;29:195-9
|How to cite this URL:|
Astekar S, Garg V, Astekar M, Agarwal A, Murari A. Genetic association in chronic periodontitis through dermatoglyphics: An unsolved link?. J Indian Acad Oral Med Radiol [serial online] 2017 [cited 2019 Apr 19];29:195-9. Available from: http://www.jiaomr.in/text.asp?2017/29/3/195/218709
| Introduction|| |
Dermatoglyphics refers to the study of epidermal ridge patterns found on fingers, palms, and soles of hand and feet. Once formed, ridge patterns remain unchanged for life and no two individuals share the same patterns, which shows the genetic association of dermatoglyphics. Offspring of chronic periodontitis patients have a high prevalence rate of periodontal breakdown, suggesting a strong familial influence. Thus, the present study was carried out with an aim to evaluate the genetic association between dermatoglyphic patterns in periodontitis patients. If significant correlations exist, it will be possible to identify individuals at high risk for development of chronic periodontitis.
| Materials and Methods|| |
A total of 60 individuals within the age group of 15–30 years were selected from the Outpatient Department of Periodontology, Institute of Dental Sciences, Bareilly, Uttar Pradesh. The sample size was estimated by G-Power software analysis. All the participants were divided into two groups of 30 each as the study group with chronic periodontitis patients (15 males and 15 females) and control group (15 males and 15 females). The study was conducted as per the guidelines of the Institutional Ethical Committee. A written informed consent was obtained from each individual after explaining them the procedure in detail in their vernacular language.
A questionnaire which included patient's demographic data was recorded. The periodontal status of all the 60 participants was assessed clinically. Cooperative patients diagnosed as chronic periodontitis were included as the study group. The clinical attachment level, pocket depth, and Russell's periodontal index were calculated. Subjects with clinical attachment level greater than 5 mm and pocket depth greater than 3 mm involving more than 30% of the site were included in the study group. According to Russell, the periodontal index score was graded between 1.6 and 5. However, the control group showed measurement within the normal range. Patients with any trauma, scar formation, developmental disturbances involving hands such as Rete syndromes, and Anglesman syndrome were excluded from the study.
The dermatoglyphic prints of all the ten fingers from both left and right hands were digitally collected using a computer connected to a biometric scanner (Futronics, FS80H, China) and digital flatbed scanner (Canon, Vietnam) for the palm prints. Care was taken to ensure that the full prints of the ridges were obtained. The observation of fingerprints and palm prints were manually accomplished for fingerprint pattern, finger ridge count, position of triradii, atd angle, a-d, and b-c distances, as mentioned below.
A. Fingerprint patterns: Fingerprint patterns were categorized as per the criteria of Sir Richard Henry  into three forms as [Figure 1]:
|Figure 1: The various finger ridge patterns showing plain arch (a), tented arch (b), radial loop (c), ulnar loop (d), plain whorl (e), central pocket whorl (f), and double loop whorl (g)|
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- Arches: It is the simplest type of pattern having no delta. It is formed when one or more epidermal ridges enter from one side of the pattern area and exits from the other side forming an elevation at the centre. The arch pattern is further of two types based upon the elevation as:
- Plain – With little elevation at the centre
- Tented – With a tent-like elevation at the centre
- Loops: It is the most common type of pattern, consisting of core and one delta. It is formed when one or more epidermal ridges enters the pattern area from one side, recurves, and exits from the same side. The loop pattern is further of two types:
- Radial – The pattern area recurves and exit from the thumb side
- Ulnar – The pattern area recurves and exit from the little finger side
- Whorl: It consists of core and two deltas. The whorl pattern is further divided into four types:
- Plain – It is formed by the loop that surrounds the core in concentric rings pattern and touches or cross the line joining the two deltas
- Central pocket – It is formed by a small loop, which does not cross the line joining the two deltas
- Double loop – It consists of two loops and two deltas separately
- Composite whorls – It is a complex pattern consisting of two deltas, with the epidermal ridges encircling a core.
B. Total finger ridge count: It indicates the pattern size. A straight line is drawn connecting the delta to the point of core. The number of epidermal ridges between the delta and core was counted numerically. The ridges containing the point of core and delta were both excluded from the count.
The observation of palm prints was manually accomplished as follows; Four digital triradii are normally situated at the bases of digits ii, iii, iv, and v; which are known as a, b, c, and d, respectively. Axial triradius is located near the most proximal margin of the palm in the space between thenar and hypothenar eminences. Depending upon the level of position, the axial triradius is termed as t. The atd angle is at the axial triradius t, between straight line drawn from t to a, and t to d. The line joining the points a to d as well as the points b to c forms the a–d and b–c distances  [Figure 2].
|Figure 2: The various palm parameters showing atd angle, dat angle, adt angle, a–d, and b–c palmar distance|
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The person who conducted the fingerprint analysis was blinded to the details of data acquisition and periodontal status of the individual. To exclude the interobserver variability all the data was examined and evaluated by the same person. The data thus obtained was gathered using Excel sheet (Microsoft Office Professional Plus 2010). Statistical analysis of the data was prepared by using Chi-square and unpaired student t-test. P value of less than 0.05 was considered to be statistically significant.
| Results|| |
Age range of the participants ranged between 15 and 30 years. Participants were divided into two groups of 30 each as controls (15 males and 15 females) and chronic periodontitis patients (15 males and 15 females). On analyzing 10 fingers and two palms in each control and periodontally compromised patient, following observations were made:
- Finger prints patterns: In control group, there was significant (P = 0.007) increase in the loop pattern (59%), whereas in chronic periodontitis patients whorl pattern (48.34%) was found to be significantly increased (P = 0.004). Among the loop pattern, ulnar loop pattern [44.33%] was significant (P = 0.006) in the control group. Among the whorl pattern, central pocket whorl pattern (30.67%) was significant (P = 0.002) in the study group. Plain arch was the least common pattern among both the groups [Table 1]
|Table 1: Various finger ridge patterns of controls and chronic periodontitis patients|
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- Total finger ridge count: The mean total finger ridge count in the left and right hands of controls was 125.40 ± 16.38, whereas in chronic periodontitis patients it was 165.69 ± 25.30, which was highly significant (P = 0.000) [Table 2]
|Table 2: Total mean finger ridge count of controls and chronic periodontitis patients|
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- atd angle: The mean atd angles measured in controls was 44.17 ± 2.56 whereas in chronic periodontitis patients it was 43.80 ± 3.00, which was not significant [Table 3]
|Table 3: The mean atd, dat, and adt angle in palm of controls and chronic periodontitis patients|
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- dat angle: The mean dat angles measured in controls was 59.20 ± 2.62 whereas in chronic periodontitis patients it was 60.60 ± 2.76, which was found to be significant (P = 0.0390) [Table 3]
- adt angle: The mean atd angles measured in controls was 76.63 ± 3.01, whereas in chronic periodontitis patients it was 75.53 ± 3.57, which was not significant [Table 3]
- a–d and b–c palmer distances: The mean a–d distance in controls and chronic periodontitis patients was 59.13 ± 3.51 and 59.90 ± 4.76, respectively, which was not found to be significant. The mean b–c distance in control and periodontally compromised patients was 18.53 ± 1.85 and 18.93 ± 2.00, respectively, which was also not significant [Table 4].
|Table 4: The Mean a–d and b–c distance in palm of controls and chronic periodontitis patients|
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The Pearson correlation coefficient among Russell's periodontal index to dermatoglyphic parameters in controls and chronic periodontitis patients showed a positive correlation except for total finger ridge count and a–d palmar distance in both the groups as well as in atd palmar angle and b–c palmar distance among control group, which showed a negative correlation [Table 5]. Comparison of Pearson correlation coefficient among controls and chronic periodontitis patients to various dermatoglyphic parameters showed a positive correlation among all the parameters except for adt palmar angle which was negative [Table 6].
|Table 5: The Pearson correlation coefficient (r) among Russell's periodontal index to dermatoglyphic parameters in controls and chronic periodontitis patients|
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|Table 6: Comparison of Pearson correlation coefficient among controls and chronic periodontitis patients to various dermatoglyphics parameter|
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| Discussion|| |
The word dermatoglyphics is derived from two Greek words, “derma” means skin and “glyphae” means carvings. The volar pads are the elevations at the distal metacarpal bone of each finger. The epidermal ridges are formed due to continuous friction occurring in the above areas. The epidermal ridges of the hand and feet were first studied by Joannes E Purkinje in 1823. William Hershel in 1858 first introduced fingerprints in India for personal identification. Sir Francis Galton in 1892 published the first book on finger prints. Cummins and Midlo in 1926 were the first to coin the term dermatoglyphics. Sir Harold Cummins is acknowledged as the father of dermatoglyphics.,
Dermatoglyphics has proven its evidence in the field of anthropology, medicine, statistics, and genetics. It also helps in personal identification, crime detection, twin diagnosis, and racial variation. Recently, the most common metabolic diseases such as hypertension and diabetes mellitus have been studied using dermatoglyphics for early prediction. Countries such as United States and Japan have applied dermatoglyphics to diagnose Down's syndrome, congenital abnormalities, and genetic abnormalities. Dermatoglyphic patterns can be recorded rapidly with ease, with minimum equipment. It is an economical and noninvasive method without causing any trauma to the patient. Data collected can be preserved for long duration for future references.
Studies on inheritance of dermatoglyphics by qualitative and quantitative methods have shown great resemblance among monozygotic twins and reasonably strong inheritance among siblings and parents. Because of the great diversity in the types and combinations of patterns found on the fingers, palms, and soles, it is evident that the formation of the dermal ridges would be determined by many genes spread over many chromosomes. Yilmaz et al. performed a study among 36 early onset periodontitis patients and 20 adult periodontitis patients and 20 periodontally healthy individuals. According to literature, offspring of chronic periodontitis patients have a high prevalence rate of periodontal breakdown, suggesting a strong familial influence. Chronic periodontitis have multifactorial etiology such as smoking, poor oral hygiene, stress and immunosuppression, strong familial influence, and gene polymorphism. Because of the significant diversity in patterns found in different diseases, offspring of chronic periodontitis patients are suggestive of specific dermatoglyphic patterns.
In the present study, there was significant increase in the whorl pattern in chronic periodontitis patients. Among the whorl pattern, central pocket whorl pattern was significantly increased. The second most common pattern found in the chronic periodontitis patients was the loop pattern. Among the loop pattern, ulnar loop pattern was found to be increased. Yilmaz et al. in 1993 performed a study among chronic periodontitis patients and periodontally healthy individuals. The results were similar to the study of Atasu et al. and Babitha et al., which also showed increased frequencies of concentric whorls and transversal ulnar loops in chronic periodontitis patients., The results were dissimilar to the study of Kochhar et al. who found decreased frequency of loop pattern in periodontally compromised patients. Unlike the present study, the authors found no significant relation of whorl pattern. Further research should be recommended in future for more accurate prediction by raising the number of study samples from different geographical areas with different ethnic origin.
| Conclusion|| |
Dermatoglyphics may serve as an early predictor in identifying the high risk group individuals of developing diseases like chronic peridontitis that have a strong hereditary background. This study would be helpful in formulating counseling messages based on dermatoglyphic pattern prevalent among young generation and their possible stimulation to determine the young people's likelihood to develop chronic periodontitis in their later age.
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Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2]
[Table 1], [Table 2], [Table 3], [Table 4], [Table 5], [Table 6]