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[Post-natal development of tooth structures in Didelphis albiventris]
Journal De Biologie Buccale
|March 1, 1987
Summary
The study tracks opossum tooth development, revealing enamel formation by 10 weeks and suggesting enamel tubules may arise from maturation or tooth function, not cellular origins. Dentinogenesis shows unique calcospherite and radiating mineralization patterns.
Area of Science:
- Developmental Biology
- Paleontology
- Comparative Anatomy
Context:
- Focuses on the post-natal tooth germ development in Didelphis albiventris (South American opossum).
- Examines key developmental stages from the 2nd to 10th week.
- Investigates the origins of enamel tubules and unique dentine mineralization patterns.
Purpose:
- To describe the timeline of dentinogenesis and amelogenesis in opossum tooth development.
- To investigate the cellular or non-cellular origin of enamel tubules.
- To characterize the mineralization patterns at the dentine front.
Summary:
- Dentinogenesis begins around week 3, with enamel deposition occurring from week 3 to 10, entering maturation by week 10.
- Enamel tubules in opossums are unlikely to have a cellular origin, suggesting a link to enamel maturation or initial tooth function.
- The mineralizing dentine front exhibits calcospherites (forming peritubular dentine first) and a radiating mineralization structure, which are rare in vertebrates.
Impact:
- Provides novel insights into marsupial tooth development and enamel biomineralization.
- Highlights exceptional mineralization processes in vertebrate dentine formation.
- Contributes to understanding evolutionary patterns in dental tissues.