1Parker S. The HLD (Cal Mod): index and the index question. Am J Orthop Dentofac Orthop, 1998;114:134- 137.
2Vig K.W.L, Weyant R, O'Brien K, etal. Developing outcome measures in orthodintics that reflect patient and provider values. Semin Orthod,1999;5:85 -95.
3Tang E. L. K, Wei S, H, Y. Recording and measuring malocclusion: A review of the literature. AmJ Orthod Dentofac Orthop, 1993;103:344-51.
4Summers CJ. A system for identifying and scoring occlusal disorders Am J Orthod, 1971;59:552-67.
5Richmond S, Shaw WC, O'Brien K.D etal. The development of the PAR Index (peer assessment rating): reliability and validity. Eur J Orthod,1992; 14:125 - 39.
6Brook PH, ahaw WC. The develolopment of an index of orthodontic treatment priority. Eur J Orthod, 1989;11:309-20.
7Evans R, shaw W. Preliminary evaluation of an illustrated scale for rating dental attactiveness. EurJ Orthod, 1987;9:314- 18.
8Draker HL. Handicapping Labiolingual deviations: a proposed index for public health purpoes. Am J Orthod, 1960;46:295 - 305.
9Ghafari J, Locke SA, Bentley JM. Longitudinal evaluation of the treatment priority Index(TPI). Am J Orthod, 1989;96:382 - 86.
10Daniels C, Richmonod S. The development of the index of complexing outcome and need (ICON). BrJ Orthod, 2000;27:149-62.
9Shaw WC,Richmond S,O'Brien KD,et al.Quality control in orthodontics:Indices of treatment need and treatment standards.Br Dent J,1991,170:107-112.
10DeGuzman L,Bahiraei D,Vig KW,et al.The validation of the Peer Assessment Rating index for malocclusion severity and treatment difficulty.Am J Orthod Dentofacial Orthop,1995,107:172-176.
