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Uwe Kierdorf - One of the best experts on this subject based on the ideXlab platform.
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dental anomalies and lesions in eastern atlantic harbor seals phoca vitulina vitulina carnivora phocidae from the german north sea
PLOS ONE, 2018Co-Authors: Patricia Kahle, Catharina Ludolphy, Horst Kierdorf, Uwe KierdorfAbstract:Skulls of 1,901 Eastern Atlantic harbor seals (Phoca vitulina vitulina) were systematically studied for externally visible dental anomalies and lesions. The sample comprised 927 males and 974 female individuals, with age at death ranging between 1 week and 25 years. Most of the skulls originated from animals collected in 1988, when the population suffered from a mass mortality event caused by the phocine distemper virus (PDV). Mean age (± SD) of females (6.7 ± 6.4 years) was higher (p = 0.002) than that of males (5.9 ± 5.2 years). In 264 individuals, one or more teeth were missing either congenitally (n = 26 animals, 1.4%) or due to intravital loss (n = 238 animals, 12.5%). One male exhibited congenital absence of all teeth (anodontia). As this animal had been reported to be almost hairless, the condition was tentatively diagnosed as a case of hypohidrotic ectodermal dysplasia. Males were more frequently (p = 0.002) affected by intravital tooth loss (15.0%) than females (10.2%). Supernumerary teeth were found in 3.4% of the skulls, with females (4.7%) showing hyperodontia more frequently (p < 0.001) than males (1.9%). Fifty-nine individuals (3.1%; 28 males, 31 females, p = 0.84) exhibited abnormal tooth morphology. Tooth fractures were noted in 40 seals (2.1%), with males being more frequently affected than females (p = 0.017). Periapical lesions were diagnosed in 143 skulls, with a tendency (p = 0.05) for males (8.7%) to be more frequently affected than females (6.4%). Enamel hypoplasia was not observed in the study sample. Analyzing the occurrence of dental anomalies and lesions in wild mammals can substantially contribute to an assessment of population health and thereby broaden the basis for effective species conservation and informed management decisions.
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Examples of supernumerary teeth in the permanent dentition of Eastern Atlantic harbor seals (Phoca vitulina vitulina).
2018Co-Authors: Patricia Kahle, Catharina Ludolphy, Horst Kierdorf, Uwe KierdorfAbstract:(a) Dorsal view of the mandibular tooth rows of a 2-year-old female (specimen ZIK 24806). There are two supernumerary teeth (located between P3 and P4) in the left and one supernumerary tooth in a corresponding position of the right mandible (arrowheads). Due to the formation of the supernumeraries, both teeth at the normal P3 position are rotated approximately 45 degrees. The condition is interpreted as the result of a splitting of both the P3 and the P4 tooth germs on the left side and of the P3 tooth germ on the right side. (b) Ventral view of maxillary and incisive bones of a 3-year-old female (specimen ZIK 28942) showing a (two-rooted) supernumerary tooth (arrowhead) situated palatal to the left P2. The cause of the hyperodontia is most probably a splitting of the P2 tooth germ. (c) Lateral view of the right maxilla of a 1-year-old male (specimen ZIK 28170), showing a peg-shaped and mesially inclined supernumerary tooth (arrowhead) located buccal to the P2 (mesial to the right). (d) Ventral view of left maxilla of a 10-year-old female (specimen ZIK 29485), showing a peg-shaped, mesially inclined supernumerary tooth (arrowhead) located palatal to the P3 (mesial to the right).
Patricia Kahle - One of the best experts on this subject based on the ideXlab platform.
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dental anomalies and lesions in eastern atlantic harbor seals phoca vitulina vitulina carnivora phocidae from the german north sea
PLOS ONE, 2018Co-Authors: Patricia Kahle, Catharina Ludolphy, Horst Kierdorf, Uwe KierdorfAbstract:Skulls of 1,901 Eastern Atlantic harbor seals (Phoca vitulina vitulina) were systematically studied for externally visible dental anomalies and lesions. The sample comprised 927 males and 974 female individuals, with age at death ranging between 1 week and 25 years. Most of the skulls originated from animals collected in 1988, when the population suffered from a mass mortality event caused by the phocine distemper virus (PDV). Mean age (± SD) of females (6.7 ± 6.4 years) was higher (p = 0.002) than that of males (5.9 ± 5.2 years). In 264 individuals, one or more teeth were missing either congenitally (n = 26 animals, 1.4%) or due to intravital loss (n = 238 animals, 12.5%). One male exhibited congenital absence of all teeth (anodontia). As this animal had been reported to be almost hairless, the condition was tentatively diagnosed as a case of hypohidrotic ectodermal dysplasia. Males were more frequently (p = 0.002) affected by intravital tooth loss (15.0%) than females (10.2%). Supernumerary teeth were found in 3.4% of the skulls, with females (4.7%) showing hyperodontia more frequently (p < 0.001) than males (1.9%). Fifty-nine individuals (3.1%; 28 males, 31 females, p = 0.84) exhibited abnormal tooth morphology. Tooth fractures were noted in 40 seals (2.1%), with males being more frequently affected than females (p = 0.017). Periapical lesions were diagnosed in 143 skulls, with a tendency (p = 0.05) for males (8.7%) to be more frequently affected than females (6.4%). Enamel hypoplasia was not observed in the study sample. Analyzing the occurrence of dental anomalies and lesions in wild mammals can substantially contribute to an assessment of population health and thereby broaden the basis for effective species conservation and informed management decisions.
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Examples of supernumerary teeth in the permanent dentition of Eastern Atlantic harbor seals (Phoca vitulina vitulina).
2018Co-Authors: Patricia Kahle, Catharina Ludolphy, Horst Kierdorf, Uwe KierdorfAbstract:(a) Dorsal view of the mandibular tooth rows of a 2-year-old female (specimen ZIK 24806). There are two supernumerary teeth (located between P3 and P4) in the left and one supernumerary tooth in a corresponding position of the right mandible (arrowheads). Due to the formation of the supernumeraries, both teeth at the normal P3 position are rotated approximately 45 degrees. The condition is interpreted as the result of a splitting of both the P3 and the P4 tooth germs on the left side and of the P3 tooth germ on the right side. (b) Ventral view of maxillary and incisive bones of a 3-year-old female (specimen ZIK 28942) showing a (two-rooted) supernumerary tooth (arrowhead) situated palatal to the left P2. The cause of the hyperodontia is most probably a splitting of the P2 tooth germ. (c) Lateral view of the right maxilla of a 1-year-old male (specimen ZIK 28170), showing a peg-shaped and mesially inclined supernumerary tooth (arrowhead) located buccal to the P2 (mesial to the right). (d) Ventral view of left maxilla of a 10-year-old female (specimen ZIK 29485), showing a peg-shaped, mesially inclined supernumerary tooth (arrowhead) located palatal to the P3 (mesial to the right).
Horst Kierdorf - One of the best experts on this subject based on the ideXlab platform.
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dental anomalies and lesions in eastern atlantic harbor seals phoca vitulina vitulina carnivora phocidae from the german north sea
PLOS ONE, 2018Co-Authors: Patricia Kahle, Catharina Ludolphy, Horst Kierdorf, Uwe KierdorfAbstract:Skulls of 1,901 Eastern Atlantic harbor seals (Phoca vitulina vitulina) were systematically studied for externally visible dental anomalies and lesions. The sample comprised 927 males and 974 female individuals, with age at death ranging between 1 week and 25 years. Most of the skulls originated from animals collected in 1988, when the population suffered from a mass mortality event caused by the phocine distemper virus (PDV). Mean age (± SD) of females (6.7 ± 6.4 years) was higher (p = 0.002) than that of males (5.9 ± 5.2 years). In 264 individuals, one or more teeth were missing either congenitally (n = 26 animals, 1.4%) or due to intravital loss (n = 238 animals, 12.5%). One male exhibited congenital absence of all teeth (anodontia). As this animal had been reported to be almost hairless, the condition was tentatively diagnosed as a case of hypohidrotic ectodermal dysplasia. Males were more frequently (p = 0.002) affected by intravital tooth loss (15.0%) than females (10.2%). Supernumerary teeth were found in 3.4% of the skulls, with females (4.7%) showing hyperodontia more frequently (p < 0.001) than males (1.9%). Fifty-nine individuals (3.1%; 28 males, 31 females, p = 0.84) exhibited abnormal tooth morphology. Tooth fractures were noted in 40 seals (2.1%), with males being more frequently affected than females (p = 0.017). Periapical lesions were diagnosed in 143 skulls, with a tendency (p = 0.05) for males (8.7%) to be more frequently affected than females (6.4%). Enamel hypoplasia was not observed in the study sample. Analyzing the occurrence of dental anomalies and lesions in wild mammals can substantially contribute to an assessment of population health and thereby broaden the basis for effective species conservation and informed management decisions.
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Examples of supernumerary teeth in the permanent dentition of Eastern Atlantic harbor seals (Phoca vitulina vitulina).
2018Co-Authors: Patricia Kahle, Catharina Ludolphy, Horst Kierdorf, Uwe KierdorfAbstract:(a) Dorsal view of the mandibular tooth rows of a 2-year-old female (specimen ZIK 24806). There are two supernumerary teeth (located between P3 and P4) in the left and one supernumerary tooth in a corresponding position of the right mandible (arrowheads). Due to the formation of the supernumeraries, both teeth at the normal P3 position are rotated approximately 45 degrees. The condition is interpreted as the result of a splitting of both the P3 and the P4 tooth germs on the left side and of the P3 tooth germ on the right side. (b) Ventral view of maxillary and incisive bones of a 3-year-old female (specimen ZIK 28942) showing a (two-rooted) supernumerary tooth (arrowhead) situated palatal to the left P2. The cause of the hyperodontia is most probably a splitting of the P2 tooth germ. (c) Lateral view of the right maxilla of a 1-year-old male (specimen ZIK 28170), showing a peg-shaped and mesially inclined supernumerary tooth (arrowhead) located buccal to the P2 (mesial to the right). (d) Ventral view of left maxilla of a 10-year-old female (specimen ZIK 29485), showing a peg-shaped, mesially inclined supernumerary tooth (arrowhead) located palatal to the P3 (mesial to the right).
Catharina Ludolphy - One of the best experts on this subject based on the ideXlab platform.
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dental anomalies and lesions in eastern atlantic harbor seals phoca vitulina vitulina carnivora phocidae from the german north sea
PLOS ONE, 2018Co-Authors: Patricia Kahle, Catharina Ludolphy, Horst Kierdorf, Uwe KierdorfAbstract:Skulls of 1,901 Eastern Atlantic harbor seals (Phoca vitulina vitulina) were systematically studied for externally visible dental anomalies and lesions. The sample comprised 927 males and 974 female individuals, with age at death ranging between 1 week and 25 years. Most of the skulls originated from animals collected in 1988, when the population suffered from a mass mortality event caused by the phocine distemper virus (PDV). Mean age (± SD) of females (6.7 ± 6.4 years) was higher (p = 0.002) than that of males (5.9 ± 5.2 years). In 264 individuals, one or more teeth were missing either congenitally (n = 26 animals, 1.4%) or due to intravital loss (n = 238 animals, 12.5%). One male exhibited congenital absence of all teeth (anodontia). As this animal had been reported to be almost hairless, the condition was tentatively diagnosed as a case of hypohidrotic ectodermal dysplasia. Males were more frequently (p = 0.002) affected by intravital tooth loss (15.0%) than females (10.2%). Supernumerary teeth were found in 3.4% of the skulls, with females (4.7%) showing hyperodontia more frequently (p < 0.001) than males (1.9%). Fifty-nine individuals (3.1%; 28 males, 31 females, p = 0.84) exhibited abnormal tooth morphology. Tooth fractures were noted in 40 seals (2.1%), with males being more frequently affected than females (p = 0.017). Periapical lesions were diagnosed in 143 skulls, with a tendency (p = 0.05) for males (8.7%) to be more frequently affected than females (6.4%). Enamel hypoplasia was not observed in the study sample. Analyzing the occurrence of dental anomalies and lesions in wild mammals can substantially contribute to an assessment of population health and thereby broaden the basis for effective species conservation and informed management decisions.
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Examples of supernumerary teeth in the permanent dentition of Eastern Atlantic harbor seals (Phoca vitulina vitulina).
2018Co-Authors: Patricia Kahle, Catharina Ludolphy, Horst Kierdorf, Uwe KierdorfAbstract:(a) Dorsal view of the mandibular tooth rows of a 2-year-old female (specimen ZIK 24806). There are two supernumerary teeth (located between P3 and P4) in the left and one supernumerary tooth in a corresponding position of the right mandible (arrowheads). Due to the formation of the supernumeraries, both teeth at the normal P3 position are rotated approximately 45 degrees. The condition is interpreted as the result of a splitting of both the P3 and the P4 tooth germs on the left side and of the P3 tooth germ on the right side. (b) Ventral view of maxillary and incisive bones of a 3-year-old female (specimen ZIK 28942) showing a (two-rooted) supernumerary tooth (arrowhead) situated palatal to the left P2. The cause of the hyperodontia is most probably a splitting of the P2 tooth germ. (c) Lateral view of the right maxilla of a 1-year-old male (specimen ZIK 28170), showing a peg-shaped and mesially inclined supernumerary tooth (arrowhead) located buccal to the P2 (mesial to the right). (d) Ventral view of left maxilla of a 10-year-old female (specimen ZIK 29485), showing a peg-shaped, mesially inclined supernumerary tooth (arrowhead) located palatal to the P3 (mesial to the right).
Jose Maria Martinezgonzalez - One of the best experts on this subject based on the ideXlab platform.
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epidemiological features and clinical repercussions of supernumerary teeth in a multicenter study a review of 518 patients with Hyperdontia in spanish population
European Journal of Dentistry, 2020Co-Authors: Jorge Cortesbreton Brinkmann, Natalia Martinezrodriguez, Maria Martinares, Javier Sanzalonso, Juan Santos Marino, Maria Jesus Suarez Garcia, Cristina Barona Dorado, Jose Maria MartinezgonzalezAbstract:Objectives The aim of this study was to establish the prevalence of supernumerary teeth (ST) in a sector of the population of Madrid, as well as possible complications associated with the presence of these teeth. Materials and Methods The study investigated patients (n = 28,114) who sought dental care at the Oral Surgery Service of three different centers between May 2005 and April 2018. Cases that did not present this numeric dental developmental variation were discarded, registering only those presenting ST. Statistical Analysis Statistical analysis consisted of univariate analysis (mean, standard deviation, median, etc.), bivariate analysis applying the chi-squared test, whereby statistical significance was established with a confidence interval (CI) of 95% (p Results The study found ST in 518 patients, representing a prevalence of 1.84%. The 518 patients presented a total of 726 ST. Distomolars were the most common, representing 37.7% of the sample, followed by premolars (20.1%). About 70.5% of the sample were located in the maxilla and 78% of ST were impacted. Radiographs revealed that 39.7% of STs were associated with disorders. Supplementary morphology appeared in 52.1% of the sample. Conclusions Although mesiodens is considered the most common ST, the present study found distomolars and supernumerary premolars to be the most frequently occurring. Pathology was associated with 39.7% of the ST sample. Early diagnosis allows optimal patient management and treatment planning, with intervention at an appropriate time to prevent complications in development and so reduce later treatment need.
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nonsyndromic multiple Hyperdontia in a series of 13 patients epidemiologic and clinical considerations
Journal of the American Dental Association, 2012Co-Authors: Jorge Cortesbreton Brinkmann, Cristina Baronadorado, Natalia Martinezrodriguez, Maria Martinares, Jose Maria MartinezgonzalezAbstract:ABSTRACT Background The authors conducted a retrospective-casuistic study to determine the prevalence of nonsyndromic multiple Hyperdontia in a sample of the population of Madrid, as well as possible complications associated with the presence of such supernumerary teeth. Methods The study included a data assessment of all patients seeking dental care at a hospital's department of oral surgery across four years. The authors studied data from patients who had nonsyndromic multiple Hyperdontia. We used univariate and bivariate analysis to make comparisions between variables. Results The authors identified nonsyndromic multiple Hyperdontia in the records of 13 patients (0.1 percent) of the total population studied. These patients had 55 supernumerary teeth. Premolars were the most frequently seen type of supernumerary tooth and constituted 45.5 percent of the sample. Conclusions Nonsyndromic multiple Hyperdontia usually is diagnosed as a coincidental radiographic finding in the course of routine examination rather than as the result of an associated disease. However, the authors found a higher percentage of comorbidity than they initially expected; mechanical or obstructive pathology was associated with 20.0 percent of the supernumerary teeth and enlargement of the follicular sac of more than 3 millimeters was present in 23.6 percent of the sample. Clinical Implications The early diagnosis and follow-up of patients with multiple supernumerary teeth should help clinicians prevent the diseases associated with this kind of hyperodontia.