Verhandlungen des XInternationalen medicinischen congresses, Berlin, 1890 . Fig. 3. The local causes producing the same condition on the forwardmovement of the first molars of the upper jaw due to the prematureextraction of the deciduous teeth or the arrested growth of the ramusof the lower maxilla. In these cases the following points should be noted:1. The facial angle is normal or nearly The alveolar process is normal with the exception of anteriorflexion only indicated by the crowded central incisors. 3. Lower maxilla normal or shortened at the rami. 4. Upper incisors crowd
Verhandlungen des XInternationalen medicinischen congresses, Berlin, 1890 . Fig. 3. The local causes producing the same condition on the forwardmovement of the first molars of the upper jaw due to the prematureextraction of the deciduous teeth or the arrested growth of the ramusof the lower maxilla. In these cases the following points should be noted:1. The facial angle is normal or nearly The alveolar process is normal with the exception of anteriorflexion only indicated by the crowded central incisors. 3. Lower maxilla normal or shortened at the rami. 4. Upper incisors crowded coming to an angle at the mesial line. 5. Bite usually more or less defective. 6. Gums usually healthy. IV. Anterior protrusion due to thumbsucking. The habit of thumbsucking manifests itself early, sometimes evenduring the first or second week. The location of this deformity isnot uniform, as it depends upon the hand used and the habitual po-sition of the finger or thumb: The development of the alveolar processof either jaw may be arrested and as a consequence the character of. Fig. 4. the vault may be modified anteriorly. The teeth usually flare out fan-shaped or one or more teeth may be pressed sideways, this tendencyincreasing with age. AVhen this habit ceases early in life the per- Talbot, Irregularities of the teeth. 113 manent teeth are usually not affected, but when continued for years,as it is in exceptional cases, a permanent deformity results. Thisform of irregularity differs from the V-shaped arch by the differencein the direction of the central incisors which in thumbsucking diverge,while in the V-shaped arch they converge. It should be noted thatthe teeth affected do not occlude owing to the cause producing theirregularity. The points noticed in the cases are: 1. The facial angle is usually normal. 2. The alveolar process is arrested or normal. 3. The lower maxilla is not affected by this deformity. 4. The teeth are flaring or diverted to one side. 5. The bite
Size: 2213px × 1129px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidverha, booksubjectmedicine
