Occlusion and Temporomandibular Function among Subjects with Mandibular Distal Extension Removable Partial Dentures

Table 4

Mean scores (SE) of occlusal tooth wear of lower anterior teeth and upper and lower premolars at the right side of the dentition.

	Observations
	Baseline	3-year	6-year	9-year
Wear on anterior teeth
SDA + RPD	1.7 (0.1)	1.8 (0.1)a^∗∗	1.8 (0.1)	1.9 (0.1)
SDA	1.5 (0.1)	1.7 (0.1)b^∗	1.9(0.1)	1.9 (0.1)
SDA previous RPD	1.5 (0.1)	1.7 (0.1)	1.8 (0.1)	1.8 (0.1)
Complete dentition	1.4 (0.1)	1.5 (0.1)ab	1.7 (0.1)	1.8 (0.1)
Wear on premolars
SDA + RPD	1.3 (0.1)c∗∗	1.4 (0.1)e∗∗∗	1.5 (0.1)h∗∗	1.6 (0.2)k^∗∗
SDA	1.0 (0.1)d∗	1.2 (0.1)f∗∗	1.4 (0.1)i∗∗	1.4 (0.1)l∗
SDA previous RPD	1.0 (0.1)	1.3 (0.1)g∗∗	1.4(0.2)j∗∗	1.6 (0.2)m∗
Complete dentition	0.8 (0.1)cd	0.9 (0.1)efg	1.1(0.1)hij	1.1(0.1)klm

same letters indicate significant difference comparing the four dental groups at the same observation.
∗:   .01<P ≤.05; ^∗∗∶ =  .001<𝑃≤.01; ∗∗∗: 𝑃≤.001.
SDA: shortened dental arch, RPD: mandibular distal extension removable partial denture.