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هذا الملف ما هو إال اجتهاد مني بتجميع عدة محاضرات من أكثر من موقع وترتيبها بهذا
الشكل.بالنسبة للترتيب فهو اعتماد على تصوير ألحد
الزمالء, بارك الله فيه, أثناء متابعته لشرح الدكتور قصي بالمحاضرة.
بعض الشرائح عبارة عن صور لعدم استطاعتي تحميل المواد من المواقع بسبب
حقوق الملكية.من أراد اإلطالع وتحميل الملفات التي
اعتمدت عليها في تجميع هذا الملف الدخول على هذه الروابط:
Second Digit = Tooth number in the quadrantSecond Digit = Tooth number in the quadrant
5 6
78
For Primary TeethFor Primary Teeth
Universal Universal system system
for for PermanePermanent Teethnt Teeth
Universal Universal System System
for Primary for Primary TeethTeeth
Mixed Dentition: Presence of both dentitionsMixed Dentition: Presence of both dentitions
Figure from Ten Cate’s Oral Histology, Ed., Antonio Nanci, 6Figure from Ten Cate’s Oral Histology, Ed., Antonio Nanci, 6 thth edition edition
Remember that during all these 3 stages is the progression thatRemember that during all these 3 stages is the progression thathappens from primary to permanent dentition which involves thehappens from primary to permanent dentition which involves theshedding (exfoliation) of primary teethshedding (exfoliation) of primary teeth
Dentition:Dentition: Diphodont: two sets of dentition in humansDiphodont: two sets of dentition in humansPrimaryPrimary vs Secondary dentition vs Secondary dentitionDeciduous vs Deciduous vs PermanentPermanent dentition dentitionMixed dentition: presence of two dentitionMixed dentition: presence of two dentition
Teeth in primary dentition are smaller and fewer in number thanTeeth in primary dentition are smaller and fewer in number thanpermanent dentition to conform to the smaller jaw sizepermanent dentition to conform to the smaller jaw size
Primary dentition: ~ 2 to 6 years of agePrimary dentition: ~ 2 to 6 years of ageMixed dentition: ~ 6 to 12 yearsMixed dentition: ~ 6 to 12 yearsPermanent dentition: > 12 yearsPermanent dentition: > 12 years
Environmental factors affecting the final position of the tooth:Environmental factors affecting the final position of the tooth:Muscular forcesMuscular forcesThumb-suckingThumb-sucking
Clinical crown:Clinical crown: During eruption, the exposed crown extending During eruption, the exposed crown extendingfrom the cusp tip to the area of the gingival attachmentfrom the cusp tip to the area of the gingival attachment
Anatomic crown:Anatomic crown: Entire crown, extending from cusp tip to the Entire crown, extending from cusp tip to thecementoenamel (CE) junctioncementoenamel (CE) junction
Sequence and chronology of tooth eruptionSequence and chronology of tooth eruption
The six/four rule for primary tooth emergenceThe six/four rule for primary tooth emergenceFour teeth emerge for each 6 months of ageFour teeth emerge for each 6 months of age
1.1. By 5 months in utero, all crowns started calcificationBy 5 months in utero, all crowns started calcification2.2. By 1 year old, all crowns completed formationBy 1 year old, all crowns completed formation3.3. By 2.5 years, all primary teeth eruptedBy 2.5 years, all primary teeth erupted4.4. By 4 years old, all primary teeth completed root formationBy 4 years old, all primary teeth completed root formation
The rules of “Fours” for permanent toothThe rules of “Fours” for permanent tooth development (3development (3rdrd molars not included) molars not included)
At birth, four 1At birth, four 1stst molars have initiated calcification molars have initiated calcificationAt 4 years of age, all crowns have initiated calcificationAt 4 years of age, all crowns have initiated calcificationAt 8 years, all crowns are completedAt 8 years, all crowns are completedAt 12 years, all crowns emergeAt 12 years, all crowns emergeAt 16 years, all roots are completeAt 16 years, all roots are complete
Rules of “sixes” in dental developmentRules of “sixes” in dental development
6 weeks old in utero: beginning of dental development6 weeks old in utero: beginning of dental development6 months old: emergence of the first primary tooth6 months old: emergence of the first primary tooth6 years old: emergence of first permanent tooth6 years old: emergence of first permanent tooth
Problems of Primary Tooth EruptionProblems of Primary Tooth Eruption
Natal and Neonatal TeethNatal and Neonatal Teeth
Submerged primary teethSubmerged primary teeth
Hyper or supra eruptionHyper or supra eruption
AnkylosisAnkylosis
Source: Color atlas of clinical oral pathology. Neville, Damm and White. 2Source: Color atlas of clinical oral pathology. Neville, Damm and White. 2 ndnd edition edition