Oral histology lec.5 - part 2 (Dentin Structures)

Oral Histology - انسجة الفم ‎محمد كامل MK 🔺رابط ملف المحاضرة 👇👇 https://t.me/dental_mk12/4244 🔺رابط قناة التليكرام (تحتوي على ملفات اسئلة وشرح وملخصات وتوضيحات لكل المواد)👇 https://t.me/dental_mk12 🔺رابط كروب المناقشه العلمية بين الطلاب 👇👇 https://t.me/group_mk12 🔺حساب الانستا 👇👇   / m12.bm   igshid=OGQ5ZDc2ODk2ZA== Dentin Structures ‎‏ هيكل الدنتين Introduction 00:00 Dentin Structures 0:24 Physical properties 10:16 Chemical properties 13:42 Dentin structural units 18:07 1- Dentinal tubules (D.T.) and its odontoblastic process 18:12 2- Peritubular Dentin 29:57 3- Intertubular Dentin 31:42 Incremental lines in Dentin 34:05 1- Imbrication or von Ebner lines 34:31 2- Counter lines of Owens 36:24 3- Neonatal lines 37:16 Interglobular D. 38:41 Tomes’ granular layer 40:57 Types of dentin 42:14 1) Primary dentin 44:12 I) Mantle dentin 45:33 II) Circumpulpal dentin 46:54 2) Secondary dentin 50:15 3) Tertiary dentin 54:33 A- Reactionary dentin 55:34 B- Reparative dentin 58:57 Architecture and structure depend on the intensity and duration of the stimulus: 01:03:34 1- rapidly, with a sparse & irregular tubular pattern and some cellular inclusions: Osteodentin 01:03:48 2- less active, it is laid down less rapidly with a more regular tubular pattern and without cellular inclusions 01:05:11 3- Transparent or Sclerotic D. 01:05:45 4- Dead tracts D. 01:08:32 Dentino-enamel junction (DEJ) 01:11:04 Clinical consideration 01:12:57 Review 01:14:59 primary curvature Secondary curvature canaliculi terminal part of dentinal tubule (D.T.)