Application of Golden Proportion Concept in Orthognathic Surgery-A Retrospective Software Profile Analysis Rekha M1, Kumar T Dinesh2,*, Neelakandan R S3, Niazi Thanveer Mohammed4 1Professor, Department of OMFS, Sri Venkateswara Dental College & Hospitals, Puducherry 2Professor & HOD, Sree Lakshmi Narayana Institute of Medical Sciences, Puducherry 3Principal, Professor & HOD, Meenakshi Ammal Dental College & Hospitals, Chennai 4Professor & HOD, CSI College of Dental Sciences & Research, Madurai *Correspondence address: Dr T Dinesh Kumar MDS, DFO., No. 18, Chandrasekarapuram, Salai Road, Trichy-620018, Mobile No. 9842466528, 9840247449, E Mail: dr_dineshmds2007@yahoo.co.in, dr_mrekha@yahoo.co.in
Online published on 31 August, 2017. Abstract Aim & Objectives The aim of the study is: 1. To analyze the proportion in persons with proportionate faces and in those with mandibular skeletal discrepancies. 2. To analyze the pre and post operative proportions in ten operated and to use a computer morphing system to compare these results with what it would have been if the patients were operated on the basis of golden proportion. Materials & Method Ricketts has shown that the condylar axis length of the mandible is golden to the corpus axis length. Such a proportion is altered in patients with Mandibular skeletal discrepancies. Therefore by bringing the corpus axis golden to the condylar axis, the end results will be more esthetic. To analyze such feasibility, six groups of individuals (Total 60 patients) were selected-two groups of 10 each with ideal esthetic proportionate faces in males and females and four groups of 10 each with obvious Mandibular prognathism and Mandibular retrognathism in males and females respectively. A cephalometric analysis of all the six groups were performed, the condylar axis and corpus axis lengths measured, the proportion calculated in each case and the results were analyzed. The study was extended to analyze ten postoperative cases, operated on the basis of routine cephalometric analysis. A computer morphing software was used to analyze how the end results would have been if the patients were operated on the basis of Golden proportion. Results From cephalometric analysis, it was found that the proportion was very close to Golden proportion in persons with ideal esthetic faces (Groups I & II) and the proportion was increased in Group III A and B (males with Mandibular prognathism and retrognathism) and decreased in Group IV A and B(females with Mandibular prognathism and retrognathism). Therefore it was well established that the proportion was altered in cases of mandibular skeletal discrepancy, It also found that the esthetic results were better in the morphed images predicted on the basis of Golden proportion than the post operative profiles in many of the patients. Conclusion Therefore the application of basic mathematical and geometric principles derived from determining the Golden proportion to the normal morphology of structures involved in orthognathic surgery, will help us to arrive at a norm in a much easier way. This would allow esthetics to be made more scientific than a mere subjective phenomenon in the past. Top Keywords Golden proportion, Mandible, Orthognathic surgery, morphed images. Top |