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[怀孕手册]
胎儿期牙齿发育时间表
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发表于:2011-07-15 11:24
胎儿期牙齿发育时间表
胎儿的牙齿从孕早期就开始形成了 <STRONG>胎儿期牙齿发育时间表</STRONG> <TABLE style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-alt: solid windowtext .5pt; mso-yfti-tbllook: 480; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext" cellSpacing=0 cellPadding=0 border=1><TBODY><TR style="HEIGHT: 16.55pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes"><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 158.95pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 16.55pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt" vAlign=top width=212><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">怀孕周数</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #d4d0c8; PADDING-BOTTOM: 0cm; WIDTH: 213.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 16.55pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" vAlign=top width=284><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">胎儿牙齿发育情况</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD></TR><TR style="HEIGHT: 32.3pt; mso-yfti-irow: 1"><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 158.95pt; BORDER-TOP-COLOR: #d4d0c8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 32.3pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=212><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">孕</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">6</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">周</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #d4d0c8; PADDING-BOTTOM: 0cm; WIDTH: 213.05pt; BORDER-TOP-COLOR: #d4d0c8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 32.3pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=284><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">胎儿的口腔上皮形成牙板,牙板上有</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">10</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">个牙蕾,形成乳牙胚</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD></TR><TR style="HEIGHT: 32.3pt; mso-yfti-irow: 2"><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 158.95pt; BORDER-TOP-COLOR: #d4d0c8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 32.3pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=212><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">孕</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">5</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">个月</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #d4d0c8; PADDING-BOTTOM: 0cm; WIDTH: 213.05pt; BORDER-TOP-COLOR: #d4d0c8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 32.3pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=284><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">乳牙的牙尖基本形成,恒牙胚在乳牙胚的深部开始发育</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD></TR><TR style="HEIGHT: 16.55pt; mso-yfti-irow: 3"><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 158.95pt; BORDER-TOP-COLOR: #d4d0c8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 16.55pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=212><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">孕</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">7</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">个月</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #d4d0c8; PADDING-BOTTOM: 0cm; WIDTH: 213.05pt; BORDER-TOP-COLOR: #d4d0c8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 16.55pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=284><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">胎儿</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">1/2</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">左右的乳牙冠形成</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD></TR><TR style="HEIGHT: 48.85pt; mso-yfti-irow: 4; mso-yfti-lastrow: yes"><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 158.95pt; BORDER-TOP-COLOR: #d4d0c8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 48.85pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=212><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">出生时</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD><TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #d4d0c8; PADDING-BOTTOM: 0cm; WIDTH: 213.05pt; BORDER-TOP-COLOR: #d4d0c8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 48.85pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=284><P style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align=center><SPAN style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">20</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">颗乳牙的牙冠几乎全部形成并钙化、</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">16</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: ´Times New Roman´; mso-hansi-font-family: ´Times New Roman´">颗恒牙胚形成恒牙的切牙、尖牙和第一恒磨牙牙胚都已形成</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"></SPAN></P></TD></TR></TBODY></TABLE><P> 由此可见,宝宝牙齿的发育几乎贯穿怀孕的全过程。当宝宝呱呱坠地时,颌骨内已经有20颗乳牙胚和16颗恒牙胚了,妈妈看不见,是因为它们还藏在牙龈(俗称“牙床子”)下没长出来。</P>
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