The widely prevailing Millard's rotation-advancement flap method is characterizes with the upper lip scar on a philtral column and that it is less conspicuous than LeMesurier's or Tennison's metheds. Nowadays, straight line closure methods are employed together with the Millard's. However there are still some problems which are a straight line closure that goes against the principle of plastic surgery, a noticeable scar, tenting of the peak of Cupid's bow, a short lip tendency, and depression of the lip when the muscle contracts. In this respect, we designed two or three small trapezoid skin flaps on the cleft side and the same number of releasing incision lines on the non-cleft side and then let them interdigitate one another. We called it dovetail cheiloplasty. The muscle work was done by suturing one third of the cleft side muscle to the dissected dermis of the non-cleft side skin flap just under the philtral dimple. Our patients had a primary incomplete, a microform type cleft lip or a secondary cleft lip deformity. The result of employing this method showed an inconspicuous scar, a shorter lip, and a natural formation of the philtrum. We believe this method induces the improvement of straight line closure with respect to the quality of scars and the morphology of an upper lip.
Cicatrix ; Cleft Lip ; Congenital Abnormalities ; Depression ; Dermis ; Humans ; Linear Energy Transfer ; Lip ; Microfilming ; Skin ; Surgery, Plastic

PURPOSE: Masseter muscle is an important muscle of mastication. Because it has a great influence on the shape of low facial contour, patients who have masseteric hypertrophy show square-shaped jaw appearance. As aesthetic procedures for the reduction of the masseter muscle volume, radiofrequency ablation or botulinium toxin injection is at the center of attention. Authors studied the anatomical measurement of the thickness and width of masseter muscle and the surface mapping of the maximal thickness point using computed tomography(CT) scan to identify the useful guide for the injection of botulinum toxin in masseteric hypertrophy patients. METHODS: We analyzed 2 mm-thickness OMU(ostiomeatal unit) CT of 112 normal people(224 masseter muscles) taken from June 2009 to May 2010. First, we measured the thickness, width and depth of the masseter muscle from the skin surface and analysed each by side, sex and age, respectively. The distribution of the thickness of the muscle and the correlation of thickness and width of the muscle were studied also. Second, we underwent surface mapping of the maximal thickness point using CT analysis by means of checking the vertical and horizontal distance from the angle of the mandible. RESULTS: The average thickness and width of the masseter muscle was 17.73 mm and 40.78 mm in the male patients and were 14.33 mm and 37.42 mm in the female patients. Statistically, both figures of the male patients were larger than those of the female patients. However, the depth of the muscle from the skin surface in female patients (7.37 mm) was larger than that of the male patients(6.15 mm). There were no statistical difference in side or age. The width and thickness of the masseter muscle were in the positive correlation. The location of maximal thickness point of the masseter muscle was 27.77 mm vertically and 27.68 mm horizontally in the male patients, and 25.19 mm vertically and 25.42 mm horizontally in the female patients from the angle of mandible. CONCLUSION: We were able to present statistical evidence of the diagnosis and treatment of the masseteric hypertrophy regarding the anatomical measurements such as the thickness and width. And the maximal thickness point of the masseter muscle may be a useful guide for the clinical procedures of botulinium toxin injection.
Botulinum Toxins ; Female ; Humans ; Hypertrophy ; Jaw ; Male ; Masseter Muscle ; Mastication ; Muscles ; Skin