The Dental record . ethrouo-h the gum. All these peculiarities are seen in the illustration,which may be accepted as the representation of the ordinary appear-ance of the teeth of the lamb at birth. By the end of the fourth week all the temporary teeth are well up,eio-ht incisors; and three molars on each side of the upper andlower jaws. From the time of the perfect eruption of the temporary teeth at theage of one month, to the cutting of the first pair of broad teeth,central permanent incisors, at the age of one year to fifteen months,the only changes which will guide the expert to a correct
The Dental record . ethrouo-h the gum. All these peculiarities are seen in the illustration,which may be accepted as the representation of the ordinary appear-ance of the teeth of the lamb at birth. By the end of the fourth week all the temporary teeth are well up,eio-ht incisors; and three molars on each side of the upper andlower jaws. From the time of the perfect eruption of the temporary teeth at theage of one month, to the cutting of the first pair of broad teeth,central permanent incisors, at the age of one year to fifteen months,the only changes which will guide the expert to a correct opinion ofthe age are those which affect the molar teeth. At three months the first permanent molar, the fourth in situation,is cut. and is recognised by its recent appearance in comparison with THE DENTAL RECORD. 307 the tooth immediately in front of it, the third temporary molar, whichshows signs of wear. In the next illustration (Fig. 35^ the appearance of the molars at Fig. 35.—Molars of Lafnb at three the age of three months is shown. During a period of five or six months from the cutting of the fourthmolar there is nothing to guide the examiner except the growth of theteeth and of the jaw, which results in leaving a space behind the fourthmolar. At the age of nine months this space is occupied by the fifthmolar, as shown in the drawing (Fig. 36). Fig. 36.—Molars of Sheep at nine
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondon, bookyear188
