Manual of dental surgery and pathology . spids of the same. The 62 MANUAL OF DENTAL SURGERY AND PATHOLOGY, second bicuspids of the lower jaw are often impacted betweenthe iirst bicuspids and first molars, and therefore may be presentwithout showing themselves at all, or until later in life, whenthey present an appearance usually internal to the dental arch. [Cases of retention of the bicuspids have been presented inthe writers practice where they did not come up to the line ofocclusion with their antagonists until after the fortieth these instances they were generally held down by the
Manual of dental surgery and pathology . spids of the same. The 62 MANUAL OF DENTAL SURGERY AND PATHOLOGY, second bicuspids of the lower jaw are often impacted betweenthe iirst bicuspids and first molars, and therefore may be presentwithout showing themselves at all, or until later in life, whenthey present an appearance usually internal to the dental arch. [Cases of retention of the bicuspids have been presented inthe writers practice where they did not come up to the line ofocclusion with their antagonists until after the fortieth these instances they were generally held down by the inclina-tion towards each other of the two adjacent teeth, the removalof either of which permitted the eruption of the retarded toothto be completed. The retention of the deciduous teeth may likewise be a fre-quent cause of irregularity as to the time of eruption as wellas to position of the permanent set.] We might perhaps have placed earlier in the list the thirdmolars, but the evidence of their absence is in many cases ren- Fiff. Upper jaw in wliich the lateral incisors have not been erupted. dered difficult by the fact that the first permanent molar is oftenregarded as a tem[)orary tooth when it is removed at an earlyage, and the space so afibrded being quite occupied by the secondmolar, the third is not uncommonly regarded as the second. IRREGULARITIES IN PERMANENT TEETH. 63 Still they are sometimes erupted at so late a period in life thatthey may be present when not suspected. [The writer has recently seen two of the wisdom teetli butpartially erupted through the gum in the mouth of a patientfifty years of age.] Another form of excess in number is where a third set ofteeth is supposed to have been erupted. Although every casewe have investigated, and they have been numerous, has turnedout to be the eruption of retarded or missing teeth, of true super-numerary teeth, or of portions of fractured roots of teeth whichbecome in time carried to the surface in the manner de
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectdentist, bookyear1882
