. Elementary and dental radiography / by Howard Riley Raper . der the Element of Depth When Judgingthe Size of an Abscess Cavity. Figure 425 is made from a photograph of a skull. Note the labio-lingual depth of the abscess cavity and how a radiograph would fail toindicate the true size of the cavity. This limitation of the radiographmust be constantly borne in mind. 26. To Mistake Normal Resorption of Bone, Due to Age, ForPyorrhea Alveolaris. The fact is well established that the sharp point of bone seen in radio-graphs between teeth is lost as age advances. This change, due to age,should not
. Elementary and dental radiography / by Howard Riley Raper . der the Element of Depth When Judgingthe Size of an Abscess Cavity. Figure 425 is made from a photograph of a skull. Note the labio-lingual depth of the abscess cavity and how a radiograph would fail toindicate the true size of the cavity. This limitation of the radiographmust be constantly borne in mind. 26. To Mistake Normal Resorption of Bone, Due to Age, ForPyorrhea Alveolaris. The fact is well established that the sharp point of bone seen in radio-graphs between teeth is lost as age advances. This change, due to age,should not be confused with pyorrhea alveolaris. 27. To Fail to Take Into Account the Effect the Tipping ofa Tooth to the Lingual or Facial Will Have on the Appearanceof the Tooth in the Radiograph. 3&> APPENDIX Figure 426 shows a lower molar which seems to have very shortroots. When extracted the roots of this tooth were found to be of normallength. Figure 427 illustrates why the roots of the molar in Fig. 426appeared short—* the tooth was tipped lingually.*. Fig. 426. The roots of the lower firstmolar seem very short, but, uponextraction, they were found to beof normal length.
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