primary dentition kuliah
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Primary dentition
Hengky B. Ardhiyanto
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Humans have two dentitions throughout life: one during childhood, called the primary dentition, and one that will hopefully last throughout adulthood, called the permanent (also known as secondary) dentition.
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• The complete primary dentition is normally present in a child from the ages of about two to six years. There are 20 teeth in the entire primary dentition
• This dentition is also called the deciduous/ milk teeth/ temporary teeth
(gigi susu, gigi sulung)
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• The complete primary dentition has five teeth in each quadrant. The primary teeth in each quadrant are further divided into three classes: incisors, canines, and molars.
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• The primary incisor closest to the midline separating the right and left quadrants is called a central incisor. The incisor next to, or lateral to, the central incisor is called a lateral incisor. Next in each quadrant is a canine, followed by two types of molars: a first molar behind the canine and then a second molar.
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PRIMARY DENTITION (facial)
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PRIMARY DENTITION (lingual)
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PRIMARY DENTITION (proximal)
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INSISIVUS SUSU PERTAMA ATASCiri-ciri :• Sudut disto-insisal membulat, sudut mesio-insisal
lancip• Mahkota mirip I permanen, tetapi lebih kecil dan
gemuk• Singulum palatal besar, tapi tidak sejelas I permanen• Permukaan labialnya halus dan cembung• Ukuran mesio-distal lebih panjang daripada serviko-
insisal• Akar agak miring ke distal
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INSISIVUS SUSU KEDUA ATAS
• Ciri-ciri :• Bentuk seperti insisivus susu pertama, tetapi
lebih kecil dan lebih sempit• Singulum palatal kurang menonjol• Sudut disto-insisal membulat, sudut mesio-insisal
lancip• Akar tunggal, bentuk sama dengan insisivus susu
pertama
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CANINUS SUSU ATASCiri-ciri :• Gigi yang terpanjang pada gigi sulung• Lereng mesial lebih pendek daripada distal• Mahkota kerucut dengan tonjolan servikal yang jelas dan cusp yang
meruncing• Mahkota lebih kecil dan lebih bulat daripada caninus tetap atas• Servikal margin pada sisi mesial lebih tinggi ke insisal edge daripada
sisi distal• Ridge labial dan palatal nyata, berjalan longitudinal dari ujung cusp• Ukuran labio-lingual lebih besar daripada mesio-distal• Panjang akar dua kali panjang mahkota• Akar miring ke distal
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MOLAR SUSU PERTAMA ATAS Ciri-ciri:• Bentuknya seperti molar tetap,dengan variasi mahkota sebagai • berikut:• a. Bentuk premolar• Bentuk seperti premolar 2 atas dengan dua cusp (bukal dan
palatal)• b. Bentuk molar• - Dengan tiga cusp: 1 di bukal, 2 di palatal (mesio dan distopalatal)• - Dengan empat cusp: 2 di bukal: (mesiobukal dan distobukal), 2 • di palatal: (mesio dan distopalatal)
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• Tonjolan jelas di sisi mesial permukaan bukal (tuberculum ZUCHERKANDL)
• Permukaan palatal lebih pendek mesio-distal dari pada permukaan bukal
• Cusp mesiopalatal terbesar dan paling runcing• Ukuran mahkota-palatal terlebar pada ujung mesial• Akar biasanya 3 buah: 2 di bukal (mesio dan
distobukal), 1 di Palatal• Akar bentuknya divergen untuk tempat premolar
pengganti
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MOLAR SUSU KEDUA ATAS
Ciri-ciri:• Pada bagian servikal permukaan bukal
terdapat tonjolan yang jelas• Terdapat carabelli cusp• Akar seperti molar pertama
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INSISIVUS SUSU BAWAH INSISIVUS SUSU PERTAMA BAWAH• Ciri-ciri :• Gigi terkecil pada gigi susu• Mahkota berbentuk pahat• Servikal margin pada sisi mesial lebih tinggi ke insisal edge
daripada sisi distal• Terdapat daerah yang menonjol pada permukaan labial
(CEJ)• Akar tunggal bulat dan meruncing• Akar miring distal
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INSISIVUS SUSU KEDUA BAWAHCiri-ciri :• Sudut disto-insisal membulat, sudut mesio-insisal
lancip• Tepi insisal miring ke bawah dari medial ke sisi distal• Lebih besar daripada insisivus susu pertama bawah• Permukaan lingual lebih cekung daripada insisivus susu
pertama bawah• Akar runcing dan umumnya lebih panjang daripada
insisivus susu pertama bawah• Akar agak miring ke distal
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CANINUS SUSU BAWAH Ciri-ciri :• Lebih kecil dan lebih ramping daripada caninus susu atas• Lereng distal lebih panjang daripada lereng mesial• Permukaan lingual cekung• Servikal margin pada sisi mesial lebih melengkung ke insisal
edge daripada sisi distal. • Ridge labial dan lingual kurang jelas, ridge lingual sering
tidak ada• Akar tunggal, meruncing, bengkok ke distal dam sedikit ke
labial
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MOLAR SUSU PERTAMA BAWAH Ciri-ciri:• Terdapat tuberculum ZUCHERKANDL• Mempunyai 4 cusp : 2 bukal (mesiobukal dan distobukal), 2 lingual
(mesio dan distolingual)• Cusp mesiobukal terbesar• Cusp lingual agak tajam daripada cusp bukal• Ukuran mesio-distal lebih besar daripada bukolingual• Permukaan bukal dan lingual cembung• Permukaan distal lebih cembung daripada permukaan mesial• Mempunyai 2 akar divergen : mesial dan distal (mesial lebih
panjang)
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MOLAR SUSU KEDUA BAWAHCiri-ciri:• bentuk seperti molar permanen pertama bawah tetapi
lebih kecil• ukuran lebih besar daripada molar susu pertama bawah• tonjolan servikal jelas pada permukaan bukal• oklusal berbentuk empat persegi panjang• mempunyai 5 cusp : 2 bukal (mesio dan distobukal), 2
lingual (mesio dan distolingual) dan 1 cusp distal mempunyai 2 akar yang divergen mesila dan distal (mesila lebih panjang)
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