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Over seven years, we have been using a prefabricated custom made nasal implant that was made of a silicone adhesive with or without a midline silicone sheet from the life-size nasal stone model of the patient. Twenty-two proportion indices were calculated from 26 surface measurements indirectly taken from the surface of the nasal stone model in 26 preoperative patients, aged 16 to 39 years(mean 25 years). Twenty-six surface measurements based on the work of Farkas included 11 singe and 6 paired lengths, 2 angles, and 1 inclination. The preoperative measurements and proportions were compared with those of postoperative. The mean follow-up period was 25 months. The analysis of the results was conducted using Wilcoxon matched-pairs signed-ranks test. The most significantly altered measurement after augmentation rhinoplasty was the lobule length(33.4%, p<0.05). The nasal root depth(31.1%), the nasal tip protrusion( 21.4 %), the ala iength(6.3% left, 7.8% right) and half arc(5.1% left, 6.8 % right), the nose length(6.5%), and the nasal root length(6.2% left, 4.6% right) were also significantly increased (p<0.05). On the contrary, the nasal root width (4.2%) and the intercanthal distance(4.2%) were significantly decreased (p < 0.05). The nasofrontal angle and the nasoiabial angle were increased a mean of 6.2 degrees and 3.0 degrees, respectively (p>O. 05). The following can be also concluded from the altered prcporticn indices after augmentation rhinoplasty. The root was more augmented in relation to the width reduction ; the root revealed a more remarkable alteration than the tip ; the tip was more projected in relation to the width reduction ; the tip revealed a cephalad rotation with the tip projection(retrousse) ; the lobule-tip protrusion ratio was more increased, which exhibits a harmony disruption compared with preoperative "worm´s eye" view ; and the nostrils became more narrowed in relation to elongation
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