Primary Dentition - Part 1

Primary Den++on Oral and Dental Sciences Aim: To recognise the shape and form of the deciduous teeth in order to recognise individual teeth, their func6ons and di7erences. Intended learning outcomes A:er this session students should be able to:  Explain the importance of the primary den++on  L...

Primary Den++on Oral and Dental Sciences Aim: To recognise the shape and form of the deciduous teeth in order to recognise individual teeth, their func6ons and di7erences. Intended learning outcomes A:er this session students should be able to:  Explain the importance of the primary den++on  List the main di7erences between the primary and permanent den66ons  Notate the erup+on dates of the primary den66on  Describe the signs and symptoms of teething  Recognise condi+ons which may occur to the primary den66on  Recognise the morphology of the primary den66on Importance of the Primary Den++on · space maintainers · Eating/Chewing Speech development · · desthetics teeth - OH how to Look after · Learning Importance of the Primary Den++on  Space maintenance molar 2nd Primary - Lost red mesial - ab - S d · Drifting/filt Towards midline Image ref: www.kcdh.org 7 Premature loss of primary tooth can lead to…. Spontaneous dri?ing of adjacent teeth into the space Delay of erup+on of permanent successor Ectopic erup6on of permanent tooth - Displaced eruption Malocclusion occlusion Incorrect -. Crowding due to caries ↑ risk of Plaque retention Image ref: www.pocketdentistry..com 8 Reten+on of primary teeth No permanent predecessor. LLE Omissin es Hypodantia-missing. Image ref: bigsmile.com.sg Image ref: drgstoothpix.com 9 What does the evidence tell us with regards to trauma of primary teeth? Does trauma in the primary den++on cause sequelae in permanent successors? A systema+c review Lenzi et al (2014) 18 studies reviewed Those who had experiences trauma in their primary incisors tend to have an increased incidence of developmental disorders in the permanent teeth following through, compared to those who had not had any trauma prior to erup+on of the permanent successor. The damage to the permanent teeth occurred more o?en and appeared to be worse the younger the child was at the +me of the trauma. 10 complete Avulsion. displacement teath- Primary of · teeth & not reimplanted &. Image ref: Dental avulsion - Wikipedia 11  frencial Enamal ci rcumnoplasia a ↓ op acite Grand ⑳ roomerati o n Resorption ↓ Or Partial di arest ↳ Root Steps * Root Angulation forming and odantama Image ref: pocketden6stry.com like malformation 12 Di7erences between the primary and permanent den++on Main di7erences Number - Primary teeth Less ? Size - Primary Smaller teeth whiter in shade Colour - Primary teeth Premolars None - Primary teeth. Exfoliate - 14 Primary teeth exfoliate and are replaced by permanent teeth between the ages of 6-13 years Primary incisors and canines replaced by permanent successors Primary first and second molars (D/E’s) are replaced by permanent first and second premolars permenant teeth mamalanes. · present on only 15 Image ref: www.pocketden6stry.com 16  Minimaprominateens. Image ref: pocketdentistry.com MiceaSam e Secondary lo differences pripal - 2. # not as Enamel Less dentine - Prominente Roots LargerPulp- Pulp - Thicker Chamber dentine NO mammelons in primary teeth 17 Erup+on Dates Pattern of eruption Primary tooth Erupts at age: Lower A 6 months Lower B 7 months Upper A 7.5 months Upper B 8-9 months Upper D 12-16 months Lower D 12-16 months Upper C 16-20 months Lower C 16-20 months Upper E 2-2.5 years Lower E 2-2.5 years 19 Teething Signs of teething Flushed cheek/s Gum appears red and sore where tooth is erup6ng Dribbling more than usual Bi6ng and chewing on ANYTHING! Irritable Rubbing their ear Some people say baby has other symptoms e.g. diarrhoea, but no evidence to show this 21  Image ref: babygaga.com Image ref: dxline.info Image ref: babycenter.com.au Image ref: easybabylife.com Image ref: babywise.life 22 Condi+ons a7ec+ng the Primary Den++on  Lacka o - Hypoplasia of enamel in preterm child 0000 of bnorma - · t ormati enamel & Amelogenesis imperfecta ↑ Risk of caries. due to pits/fissures / exposed dentine Images ref: pocketden6stry.com 24  Developmental enamel defects Present as enamel hypoplasia or opaci+es Caused by damage/disrup+on to the developing enamel Various causes include inherited and acquired systemic condi+ons Defec6ve enamel is thinner, more plaque reten+ve, less resistant to acid a^ack Appearance of defect depends on stage of development when disrup6on occurred, also the extent and dura+on of the disrup6on Increases risk of primary teeth to early childhood caries and toothwear Ref: Developmental enamel defects in the primary dentition: aetiology and clinical manageme nt (wiley.com) 25 Student Task Please download and complete the Primary Dentitions Workbook. 28 References and further reading h^ps://www.researchgate.net/pro`le/Lucianne-Maia/publica+on/ 268080597_Does_trauma_in_the_primary_den++on_cause_sequelae_in_permanent_succ essors_A_systema+c_review/links/57ed39b208ae07d8d8f641d6/Does-trauma-in-the- primary-den++on-cause-sequelae-in-permanent-successors-A-systema+c-review.pdf Leeds University, 2014. Tooth Morphology Lab. [online] Available at: h^p://www.den+stry.leeds.ac.uk/students/vlab/morphology/ (Accessed 20 March 2021) Dental Morphology, An illustrated guide. Geoffrey C Van Beek (various editions available) 29