Primary Dentition PDF

Primary Dentition Oral and Dental Sciences Aim: To recognise the shape and form of the deciduous teeth in order to recognise individual teeth, their functions and differences. Intended learning outcomes After this session students should be able to:  Explain the importance of the primary dentit...

Primary Dentition Oral and Dental Sciences Aim: To recognise the shape and form of the deciduous teeth in order to recognise individual teeth, their functions and differences. Intended learning outcomes After this session students should be able to:  Explain the importance of the primary dentition  List the main differences between the primary and permanent dentitions  Notate the eruption dates of the primary dentition  Describe the signs and symptoms of teething  Recognise conditions which may occur to the primary dentition  Recognise the morphology of the primary dentition GDC Learning Outcomes 2013: 1.1.5 Describe relevant and appropriate dental, oral, craniofacial and general anatomy and explain their application to patient management 2023: C 1.5 Identify relevant and appropriate dental, oral, craniofacial, and general anatomy (recognising the diversity of anatomy across the patient population) and explain their relevance to patient management Importance of the Primary Dentition They’re only baby teeth- they’re going to fall out anyway! Why are they so important? Image ref: childrenscolorado.org Image ref:clinicoral.com Image ref:raisingchildren.net.au Image ref: arizonafamilydental.com 6  Space maintenance Image ref: www.kcdh.org 7 Premature loss of primary tooth can lead to…. Spontaneous drifting of adjacent teeth into the space Delay of eruption of permanent successor Ectopic eruption of permanent tooth Malocclusion Crowding Image ref: www.pocketdentistry.com 8 Retention of primary teeth 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 dentition cause sequelae in permanent successors? A systematic 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 eruption of the permanent successor. The damage to the permanent teeth occurred more often and appeared to be worse the younger the child was at the time of the trauma. 10 Image ref: Dental avulsion - Wikipedia 11 Image ref: pocketdentistry.com 12 Differences between the primary and permanent dentition Main differences Number ? Size Colour Premolars 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 15 Image ref: www.pocketdentistry.com 16  Image ref: pocketdentistry.com Secondary differences Enamel Roots Pulp NO mammelons in primary teeth 17 Eruption 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 erupting Dribbling more than usual Biting 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 Conditions affecting the Primary Dentition Hypoplasia of enamel in preterm child Amelogenesis imperfecta Images ref: pocketdentistry.com 24  Developmental enamel defects Present as enamel hypoplasia or opacities Caused by damage/disruption to the developing enamel Various causes include inherited and acquired systemic conditions Defective enamel is thinner, more plaque retentive, less resistant to acid attack Appearance of defect depends on stage of development when disruption occurred, also the extent and duration of the disruption 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. 26 References and further reading https://www.researchgate.net/profile/Lucianne-Maia/publication/ 268080597_Does_trauma_in_the_primary_dentition_cause_sequelae_in_permanent_succ essors_A_systematic_review/links/57ed39b208ae07d8d8f641d6/Does-trauma-in-the- primary-dentition-cause-sequelae-in-permanent-successors-A-systematic-review.pdf Leeds University, 2014. Tooth Morphology Lab. [online] Available at: http://www.dentistry.leeds.ac.uk/students/vlab/morphology/ (Accessed 20 March 2021) Dental Morphology, An illustrated guide. Geoffrey C Van Beek (various editions available) 27