Dental Dentures: Partial | Cosmetic Dentistry
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7.3 Anterior Dentition Remaining in the Lower Arch, Edentulous Upper Arch
 65 The following situation is very often encountered: the upper arch is edentulous and in the lower arch only the anterior dentition remains, for example, 34 to 44. If the lower arch is not satisfactorily restored the entire masticatory process will take place in the anterior region of the mouth. This is not particularly disadvantageous for the lower arch, but in the upper arch a flabby ridge often develops. This is due to the concentrated chewing force over a smaller area with subsequent bone resorption and its replacement by connective tissue (Fig. 65). (more…) |
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7.2 Settling of the Lingual Bar
 61 Relatively often denture sore spots caused by a lingual bar are seen on the alveolar wall. One assumes this to be the result of poor workmanship and speculates on the ideal distance which should be maintained between alveolar wall and the lingual bar. A few comments on the subject: The sore spots never occur immediately after delivering the partial denture, but rather, at a much later date – 6 months, a year, or even later (Fig. 61). In addition, they occur much more frequently in cases where the remaining anterior dentition is smaller. One can explain this as follows: (more…) |
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7.1 Extension of the Base in the Upper Arch
 58 In an arch with only the anterior dentition remaining, the extension of the partial denture base is dependent upon the static situation. When a free-end saddle is subjected to occlusal forces the denture rotates around an axis formed by connecting the distal rest on the same side with the end of the base on the opposite side. Occlusal forces acting on the opposite saddle produce the mirror-image of this same reaction. Care must be taken here to insure that the denture base is not extended ventral to the junction of the two axes of rotation (Fig. 58). (more…) |
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