Developmental defects of enamel are visible deviations from the normal translucent appearance of tooth enamel resulting from enamel organ dysfunction. In the past, information about the activities of the ameloblasts has determined the terminology used to describe the lesions. Advances in our understanding of the complicated secretory and maturation phases of amelogenesis have required a re-appraisal of the concepts of defect formation. The phase of ameloblast activity, the duration of the disturbance, and its severity leading to temporary or permanent inactivity of the cells determine the appearance of the three common types of lesions—hypoplasia, and diffuse and demarcated opacities.
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References
1.
Avery, J.K.; Visser, R.L.; and Knapp, D.E. (1961): The Pattern of the Mineralization of Enamel, J Dent Res40:1004-1019.
2.
Crabb, H.S.M. (1976): The Porous Outer Enamel of Unerupted Human Premolars , Caries Res10:1-7.
3.
Deakins, M. (1942): Changes in the Ash, Water, and Organic Content of Pig Enamel During Calcification, J Dent Res21 :429-435.
4.
Dean, H.T. (1934): Classification of Mottled Enamel Diagnosis, J Am Dent Assoc21:1421-1426.
5.
Deutsch, D. and Gedalia, I. (1980): Chemically Distinct Stages in Developing Human Fetal Enamel, Arch Oral Biol25:635-639.
6.
Deutsch, D. and Pe'er, E. (1982): Development of Enamel in Human Fetal Teeth, J Dent Res61:1543-1551.
7.
Diamond, M. and Weinmann, J.P. (1940): The Enamel of Human Teeth, New York: Columbia University Press.
8.
Fass, E.N. (1969): A Chronology of Growth of the Human Dentition , J Dent Child36:391-401.
9.
FDI Technical Report No. 15(1982): An Epidemiological Index of Developmental Defects of Dental Enamel, Int Dent J32:159-167.
10.
Haavikko, K. (1970): The Formation and the Alveolar and Clinical Eruption of the Permanent Teeth, Finn Dent J66:103-170.
11.
Kreshover, S.J. (1940): Histopathologic Studies of Abnormal Enamel Formation in Human Teeth, Am J Orthodont Oral Surg26:1083-1101.
12.
Kronfeld, R. and Schour, I. (1939): Neonatal Dental Hypoplasia, J Am Dent Assoc26:18-32.
13.
Logan, W.H.G. and Kronfeld, R. (1933): Development of the Human Jaws and Surrounding Structures from Birth to the Age of Fifteen Years, J Am Dent Assoc20:379-424.
14.
Murray, J.J. (1975): A History of Water Fluoridation. In: Fluorides in Caries Prevention, Dental Practitioner Handbook No. 20, J.J. Murray, Ed., Bristol: John Wright and Sons Ltd. , pp. 1-24.
15.
Nielsen, H.G. and Ravn, J.J. (1976): A Radiographic Study of Mineralization of Permanent Teeth in a Group of Children, aged 3-7 Years, Scand J Dent Res84:109-118.
16.
Purdell-Lewis, D.J.; Suckling, G.W.; Triller, M.; and Jongebloed, W.L. (1987): Artificially Induced Developmental Defects in Sheep Enamel Examined by Scanning Electron Microscopy, J Biol Buccale15:119-124.
17.
Robinson, C.; Briggs, H.D.; Atkinson, P.J.; and Weath-Erell, J.A. (1981): Chemical Changes During Formation and Maturation of Human Deciduous Enamel, Arch Oral Biol26 :1027-1033.
18.
Robinson, C.; Fuchs, P.; Deutsch, D.; and Weatherfell, J.A. (1978): Four Chemically Distinct Stages in Developing Enamel from Bovine Incisor Teeth, Caries Res12:1-11.
19.
Sarnat, B.G. and Schour, I. (1941, 1942): Enamel Hypoplasia (Chronologic Enamel Aplasia) in Relation to Systemic Disease: A Chronologic, Morphologic and Etiologic Classification, / Am Dent Assoc28:1989-2000;29:67-75.
20.
Schour, I. and Massler, M. (1941): The Development of the Human Dentition, J Am Dent Assoc28:1153-1160.
21.
Suckling, G. (1979): Mineralization of the Enamel of Ovine Permanent Central Incisor Teeth Using Microhardness and Histological Techniques, Calcif Tissue Int28:121-129.
22.
Suckling, G. (1980): Defects of Enamel in Sheep Resulting from Trauma During Tooth Development, J Dent Res59:1541-1548.
23.
Suckling, G.; Elliott, D.C.; and Thurley, D.C. (1983): The Production of Developmental Defects of Enamel in the Incisor Teeth of Penned Sheep Resulting from Induced Parasitism, Arch Oral Biol28:393-399.
24.
Suckling, G.; Elliott, D.C.; and Thurley, D.C. (1986): The Macroscopic Appearance and Associated Histological Changes in the Enamel Organ of Hypoplastic Lesions of Sheep Incisor Teeth Resulting from Induced Parasitism, Arch Oral Biol31 :427-439.
25.
Suckling, G.W.; Nelson, D.G.A.; and Patel, M.J. (1989): Macroscopic and Scanning Electron Microscopic Appearance and Hardness Values of Developmental Defects in Human Permanent Tooth Enamel, Adv Dent Res (this symposium).
26.
Suckling, G.W. and Purdell-Lewis, D.J. (1982a): The Pattern of Mineralization of Traumatically-induced Developmental Defects of Sheep Enamel Assessed by Microhardness and Microradiography, J Dent Res61:1211-1216.
27.
Suckling, G.W. and Purdell-Lewis, D.J. (1982b): Macroscopic Appearance, Microhardness and Microradiographic Characteristics of Experimentally Produced Fluorotic Lesions in Sheep Enamel, Caries Res16:227-234.
28.
Suckling, G. and Thurley, D.C. (1984): Histological, Macroscopic and Microhardness Observations of Fluoride-induced Changes in the Enamel Organ and Enamel of Sheep Incisor Teeth, Arch Oral Biol29:165-177.
29.
Suckling, G.; Thurley, D.C.; and Nelson, D.G.A. (1988): The Macroscopic and Scanning Electron Microscopic Appearance and Microhardness of the Enamel, and the Related Histological Changes in the Enamel Organ of Erupting Sheep Incisors Resulting from a Prolonged Low Daily Dose of Fluoride, Arch Oral Biol33:361-373.
30.
Suga, S. (1982): Progressive Mineralization Pattern of Developing Enamel During the Maturation Stage, J Dent Res61:1532-1542.
31.
Suga, S. (1983): Comparative Histology of the Progressive Mineralization Pattern of Developing Enamel. In: Mechanisms of Tooth Enamel Formation, S. Suga, Ed., Tokyo: Quintessence, pp. 167-203.
32.
Weinmann, J.P.; Svoboda, J.F.; and Woods, R.W. (1945): Hereditary Disturbances of Enamel Formation and Calcification, J Am Dent Assoc32:397-418.
