Histology of Dentine PDF

Histology of Den.ne Tutor: Lauren Stockham Module: Oral and Dental Sciences Year 1 Intended learning outcomes By the end of the session students should be able to: Describe the composi.on and structure of den.ne Dis5nguish between the 3 types of den.ne (primary, secondary and ter5ary) Des...

Histology of Den.ne Tutor: Lauren Stockham Module: Oral and Dental Sciences Year 1 Intended learning outcomes By the end of the session students should be able to: Describe the composi.on and structure of den.ne Dis5nguish between the 3 types of den.ne (primary, secondary and ter5ary) Describe how the structure of den.ne relates to its func.on Apply this knowledge to interpret the clinical signiBcance of den.ne in health and disease GDC Learning Outcomes: 1.1.5, 1.1.6 Histology of the.ssues of the teeth and suppor.ng structures Enamel Den5ne Pulp Cementum Bone (alveolar) Periodontal ligament Gingiva Refresh prior knowledge… 1. Loca5on of den5ne 2. Den5nogenesis – how den5ne is formed Cells from inner epithelium signal cells at periphery of the dental papilla to form odontoblasts. 3. Embryonic origin - ? Forms from the neural crests , odontoblasts are the cells that form dentine by dentiogensis. Refer back to lectures: - Oral embryology - Tooth morphology Iden5fy the den5ne in this cross-sec5onal diagram of a tooth Why do you need to know about den.ne? Identification of Dentine Pathology and Restorative caries - hypersensitivity repair of and bonding infected, Radiographs and dentine linked materials affected and management to pulp healthy dentine This knowledge links to clinical assessment, diagnosis, management and advice. These are some examples, but not exhaus5ve. Key features: Dental Tubules Composi.on and Structure Composi.on of den.ne Avascular Mineralised Connective tissue Slightly flexible due to organic material and water content Approximately: 70% inorganic minerals calcium hydroxyapa5te (smaller than enamel) 20% organic material Majority collagenous rich matrix (18%) Minority non-collagenous matrix proteins and lipids (