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  • Oral presentation
  • Open Access

Classification of objective aesthetic parameters in idiopathic scoliosis

Scoliosis20094 (Suppl 2) :O17

  • Published:


  • Idiopathic Scoliosis
  • Back Surface
  • Objective Parameter
  • Automatic Classification
  • Classification Index


To use non-invasive surface instruments to define Objective Aesthetic Parameters and to obtain an Aesthetic Classification System in idiopathic Scoliosis.


Aesthetic correction is a main aim in scoliosis treatment as defined by SOSORT. Objectively defining aesthetic parameters is difficult; recently TRACE has been proposed as a possible option, being the standardization of the subjective medical expert evaluation. Objective measures are needed for an automatic classification of aesthetics in scoliosis and for other severe back deformities. A 3D reconstruction of the back surface delivers a set of objective parameters used as a basis for this aesthetic classification.


The Formetric measurement system reconstructs human back surfaces in semi-real time. From the acquiesced 3D data a set of objective anatomical and aesthetical parameters, one can automatically calculate:
  • shoulder rotation, slope angle and height difference

  • scapular symmetry

  • symmetry of flanks and waist triangles

  • rib humps and asymmetry in waist region

  • pelvic displacements

The above parameters form a basis from which classification indexes can be calculated and derived according to a specific set of expert rules.


Especially in severe cases it is possible to transfer the essentials of relative subjective classifications to objective measures and parameters. Vague and hard-to-catch impressions like "it doesn't look good" can to a certain degree be judged by neutral criteria: Shoulder and pelvis symmetry; angles, area- and height-differences of scapula; differences in waist triangles, etc.


The visual impression of aesthetics correlates closely to the objective parameters described above.

Authors’ Affiliations

Diers International, Dillenbergweg 4, 65388 Schlangenbad, Germany


© Diers et al; licensee BioMed Central Ltd. 2009

This article is published under license to BioMed Central Ltd.