. Dental and oral radiography : a textbook for students and practitioners of dentistry . Fig. 104.—Unerupted lower second molar prevented from erupting through impaction against the lower first molar. INDICATIONS FOR X-RAY IN DENTISTRY 157 4. To determine the approximate direction in whichteeth are erupting and the relationship which they willbear to the line of occlusion when erupted. Where the deciduous teeth have been retained in themonth longer than the normal time and where the rootsof these teeth have not been entirely absorbed, the erupt-ing permanent teeth will sometimes be deflected f


. Dental and oral radiography : a textbook for students and practitioners of dentistry . Fig. 104.—Unerupted lower second molar prevented from erupting through impaction against the lower first molar. INDICATIONS FOR X-RAY IN DENTISTRY 157 4. To determine the approximate direction in whichteeth are erupting and the relationship which they willbear to the line of occlusion when erupted. Where the deciduous teeth have been retained in themonth longer than the normal time and where the rootsof these teeth have not been entirely absorbed, the erupt-ing permanent teeth will sometimes be deflected from. Fig. 105.—Unerupted upper bicuspid teeth which are being deflected to the lingual.


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