. Elementary and dental radiography / by Howard Riley Raper . reasons, we often crown them. Theporcelain jacket crown is difficult to construct and, at best, fragile. Ifthe root of the peg lateral is long enough the operator may elect to usea post porcelain crown of some kind instead of the porcelain 235 shows a peg-shaped lateral. In this case the root is long enoughbut it is bent, which increases the risk attending devitalization and canalwork. 210 DEXTAL RADIOGRAPHY Before using teeth as abutments for largeTig. 236. bridges, it would not be unwise to make radiographs to note the
. Elementary and dental radiography / by Howard Riley Raper . reasons, we often crown them. Theporcelain jacket crown is difficult to construct and, at best, fragile. Ifthe root of the peg lateral is long enough the operator may elect to usea post porcelain crown of some kind instead of the porcelain 235 shows a peg-shaped lateral. In this case the root is long enoughbut it is bent, which increases the risk attending devitalization and canalwork. 210 DEXTAL RADIOGRAPHY Before using teeth as abutments for largeTig. 236. bridges, it would not be unwise to make radiographs to note the size of the roots. It would be a mistake,I believe, to use such a tooth as the malformed one shown in Fig. 236 asan abutment for a bridge of any extent. It should be borne in mind thatunless the pose is exactly right—and we seldom have it so—the teeth, asthey appear on the radiograph, do not represent definitely the exact lengthof the teeth themselves. Nevertheless, the radiograph does give us afairlv definite idea of the relative length of the
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