title: Correlation of M-L, Leinfelder, and USPHS clinical evaluation techniques for wear.
abstract: Most recent clinical research studies on wear of posterior composite restorations have used the USPHS and Leinfelder measuring techniques. New studies are adopting the Moffa-Lugassy (M-L) technique. However, to date there has been no means of comparing results of the different techniques. The objective of this study was to correlate the M-L scale wear values to Leinfelder scale wear values and to USPHS scale alfa-bravo transitions, so that data can be pooled across studies for comparisons. M-L evaluations were made for 221 restorations previously evaluated by the USPHS and Leinfelder methods. The M-L wear values were determined as the mean of three independent evaluators' values. At the USPHS alfa-bravo transition, the mean Leinfelder wear value was 192 microns, and the mean M-L value was 97 microns. The correlation coefficient for the linear regression of M-L values vs. Leinfelder values was 0.87. The scales were linearly related, with a slope of 0.52. The average values for M-L readings of wear were statistically different and approximately half the Leinfelder values.
authors: School of Dentistry, University of North Carolina, Chapel Hill.
authors: D F
authors: DF
authors: Taylor
authors: S C
authors: SC
authors: Bayne
authors: J R
authors: JR
authors: Sturdevant
authors: A D
authors: AD
authors: Wilder
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards*; D003188:Composite Resins; D003793:Dental Restoration, Permanent; D015201:Meta-Analysis as Topic; D008963:Molar; D013499:Surface Properties
chemical_list: D003188:Composite Resins