Abutment sites and spaces in partial denture case analysis

Abstract The system of case analysis serves as a guide to the isolation of stress elements in a partial denture case, to their evaluation , and to the integration of the parts into a treatment plan. The dentist must secure basic data to guide him in case planning. The initial approach to case analysis is a survey of the following problems in the patient under consideration: 1.I. Segmental Problems Types of missing segments 1.1.A. Anterior space 1.2.B. Bounded posterior space 1.3.C. Cantilever (free-end) posterior space 2.II. Specific Stress Problems 2.1.1. Vertical 2.1.1.a) Displacing 2.1.2.b) Dislodging 2.2.2. Horizontal 2.3.3. Torsional 3.III. Tooth- and tissue-bearing problems 4.IV. Isolated tooth problems 5.V. Segmental reciprocation problems Adherence to this system affords the dentist the opportunity to think through the variety of stress problems which he must expose before planning a restoration. It is an aid in the visualization of case problems. In learning this approach to partial denture problems, it will be found that a more intelligent evaluation is made if the dentist proceeds according to the outline presented. Recourse to engineering terms and principles should be minimal, most of the stresses and strains are definable in terms commonly used by the dentist. The system has both an outer shell and an inner core. The outer shell is the outline. The core is the analytical skill of the individual applying his knowledge and sagacity to the case. If the outline becomes an end instead of a means, it fails to fulfill its purpose. This outline of case analysis possesses a cumulative framework, giving constant emphasis to the dentist's own thought and judgment. By means of systematization of an analytical procedure embracing a few aspects of partial denture planning, dentists may make a first step toward thinking alike in their diagnostic studies of stress problems in partial denture construction.