Scanning electron microscopy of developing human deciduous incisor teeth |
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| Authors: | J R Van Treese R B Paulson K Rossie |
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| Affiliation: | 1. Division of Normal Anatomy, Department of Human Morphology and Embryology, Wrocław Medical University, Wrocław, Poland;2. Department of Ultrastructural Reasearch, Wrocław Medical University, Wrocław, Poland;3. Department of Dental Surgery, Wroclaw Medical University, Wrocław, Poland;4. Department of Conservative Dentistry and Pedodontics, Wroclaw Medical University, Wrocław, Poland;5. Institute of Functional and Clinical Anatomy, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany;6. Department of Topographic Anatomy and Operative Surgery, Sechenov University, Moscow, Russia;1. LABANOF, Laboratorio di Antropologia e Odontologia Forense, Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via L. Mangiagalli 37, 20133 Milan, Italy;2. Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Via Mangiagalli 31, 20133 Milan, Italy;3. Fondazione Isacchi Samaja ONLUS, Milano, Italy |
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| Abstract: | The mineralized parts of the teeth of 17 human fetal dentitions, aged 15-38 weeks, were measured mesio-distally and occluso-cervically. The growth pattern of the incisors, with particular emphasis on the changes at the developing incisal edge was studied. Contralateral teeth in the same arch developed at approximately the same rate and with mirror-image morphology. Mineralization started in the upper and lower central incisors, followed by the corresponding lateral incisors. It then progressed at approximately the same rate for both incisors. At first, mesio-distal enamel growth was more significant, but was surpassed by occluso-cervical development later. Five development stages were identified as the incisors developed from a central lobe to the mature form. The main component of growth for the mesial lobe was in the incisal direction, and for the distal lobe in a distal direction, resulting in the characteristic approximal asymmetry of these teeth. |
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