. 2019 Feb 18;51(1):100–104. [Article in Chinese] doi: 10.19723/j.issn.1671-167X.2019.01.018

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三种操作条件下的牙体预备效果

Results of tooth preparation under three conditions

Group	Efficiency of preparation		Quality of preparation		Accuracy of preparation/mm				Preference
Group	Subjective visual analogue score	Time/s	Subjective visual analogue score	Expert evaluation	Incisal third	Middle third	Cervical third	Subjective visual analogue score
For each column, groups identified by different superscript letters (a, b) were significantly different (P<0.05).
Control	7.15±1.73^a	430.10±163.04^ab	6.55±2.09^ab	12.20±1.67^ab	0.107±0.097^a	0.128±0.073^a	0.075±0.054^a	6.55±2.31^a
Loupes	8.10±0.91^a	393.90±157.27^a	7.85±0.99^a	12.50±1.70^a	0.142±0.118^a	0.113±0.105^a	0.068±0.044^a	8.60±1.10^b
Microscopic	5.40±2.04^b	441.95±164.18^b	6.25±1.77^b	11.35±2.60^b	0.123±0.087^a	0.125±0.077^a	0.058±0.047^a	5.80±2.07^a
P	<0.001	0.017	0.018	0.015	0.299	0.637	0.467	<0.001