Table 4.
Quality of instructions for RPD design according to type of cast and Kennedy classification.* p-value of the t-test for independent samples indicating no significance difference. ** p-value of the one-way ANOVA indicating significance difference. Quality scores: 0 = No instructions were provided by the dentist for the design of any element of the RPD. 1, 2 or 3= One, two or three elements of the RPD was/were prescribed by the dentist. 4 = Instructions were provided by the dentist for the design of the four main elements of the RPD, i.e. shape of the major connector, type of the direct retainer, position of the direct retainer, and position of the dental rests.
| Quality | Type of cast | Kennedy classification | |||||
|---|---|---|---|---|---|---|---|
| score | Maxillary | Mandibular | Class I | Class II | Class III | Class IV | Total |
| 0 | 52(67.5%) | 52(61.2%) | 53(61%) | 35(79.5%) | 14(53.8%) | 2(40%) | 104(64.2%) |
| 1 | 9(11.7%) | 13(15.3%) | 16(18.4%) | 4(9.1%) | 0(0%) | 2(40%) | 22(13.6%) |
| 2 | 1(1.3%) | 3(3.5%) | 3(3.4%) | 0(0%) | 1(3.8%) | 0(0%) | 4(2.5%) |
| 3 | 2(2.6%) | 1(1.2%) | 3(3.4%) | 0(0%) | 0(0%) | 0(0%) | 3(1.9%) |
| 4 | 13(16.9%) | 16(18.8%) | 12(13.8%) | 5(11.4%) | 11(42.4) | 1(20%) | 29(17.9%) |
| Total | 77(100%) | 85(100%) | 87(100%) | 44(100%) | 26(100%) | 5(100%) | 162(100%) |
| Mean (SD) | 0.9(1.53) | 1.01(1.56) | 0.91(1.43) | 0.55(1.28) | 1.77(1.99) | 1.2(1.64) | 0.96(1.54) |
| p | *0.634 | **0.013 |