Statistical Observation of Removable Partial Dentures Constructed in Clinical Practice

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  • 臨床実習における局部床義歯に関連する統計的観察

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Abstract

We made statistical observations based on the Kennedy classification of removable partial dentures (RPDs) constructed in clinical practice at Osaka Dental University Hospital between October 1987 and September 1990. <br> The results obtained were as follows : <br> 1) The most common RPD was class I (861), followed by class II (661), class III (233), and class IV (83). <br> 2) The age distribution peaked at 60〜64 years for class I, 50〜54 years for class II, 55〜59 years for class III and 60〜64 years for class IV. <br> 3) A provisional denture was used prior to placement of the final denture in 38.9% of the maxillary class III cases, 33.9% of the maxillary class IV cases, and 29.6% of the mandibular class IV cases. <br> 4) The arch opposing a maxillary class I or class II RPD most commonly had a new RPD, a maxillary class III or class IV RPD most commonly opposed natural dentition, a mandibular class I RPD most commonly opposed a new RPD, and a mandibular class II, III or IV RPD usually opposed natural dentition. <br> 5) Resin plates were most frequently used as the major connector for maxillary RPDs ; palatal bars were rare, except that cast Ag-Pd-Au alloy palatal bars were used in class II RPDs. The frequency of cast palatal plates were 15.7% for class II cases and about 20% for all other classes. Resin plates were most frequently used for the mandibular major connector, followed by cast lingual bars. <br> 6) Artificial molars were eliminated to reduce the load on the supporting soft tissues and abutment teeth in 27.3% of the maxillary class I cases, 13.4% of the mandibular class II cases, 26.9% of the mandibular class I cases and 20.8% of the mandibular class II cases. <br> 7) Combination clasps were often used on cuspids or premolars, reflecting the effect of education on clinical practice.

Journal

  • Shikaigaku

    Shikaigaku 55 (4), 376-391, 1992

    Osaka Odontological Society

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