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- W2067206893 abstract "Purpose The goal of this retrospective study was to evaluate the horizontal and vertical facial soft tissue changes occurring after maxillomandibular advancement (MMA) surgery to treat obstructive sleep apnea (OSA). Patients and Methods The study group comprised 31 consecutive adult patients with OSA who underwent MMA through Le Fort I osteotomy and bilateral sagittal split ramus osteotomies. Adjunctive maxillary procedures, consisting of piriformplasty, anterior nasal spine recontouring, alar base cinch, and V-Y closure of the upper lip, were used for all patients. A “best-fit” templating cephalometric technique was used to assess dentoskeletal movements and corresponding soft tissue changes. Results Maxillary movements (measured at point A) averaged 8.77 ± 2.34 mm horizontally and 2.20 ± 2.42 mm vertically. Mandibular movements (measured at point B) averaged 11.16 ± 2.56 mm horizontally and 2.25 ± 3.02 mm vertically. The horizontal upper lip soft tissue–to–hard tissue ratios averaged >0.90:1 (SLS/A, 0.97:1; Ls/U1fac, 0.96:1; Stms/ls, 0.86:1). Upper lip length (Sn-Ls) increased by a clinically insignificant amount (0.37 mm). The nasolabial complex rotated in a counterclockwise rotation, with the nasolabial angle decreasing (3.87 degrees) due primarily to forward movement of the upper lip. Horizontal lower lip and chin soft tissue–to–hard tissue ratios averaged >0.90:1 (Stmi/li, 0.90:1; Li/Ii, 0.89:1; Pg′/Pg, 0.92:1; Me′/Me, 0.91:1). Conclusions This study demonstrated that MMA in this selected group of OSA patients results in soft tissue movements producing a soft tissue–to–hard tissue ratio of about 0.90:1 for most anatomic sites of the upper lip, lower lip, and chin. The goal of this retrospective study was to evaluate the horizontal and vertical facial soft tissue changes occurring after maxillomandibular advancement (MMA) surgery to treat obstructive sleep apnea (OSA). The study group comprised 31 consecutive adult patients with OSA who underwent MMA through Le Fort I osteotomy and bilateral sagittal split ramus osteotomies. Adjunctive maxillary procedures, consisting of piriformplasty, anterior nasal spine recontouring, alar base cinch, and V-Y closure of the upper lip, were used for all patients. A “best-fit” templating cephalometric technique was used to assess dentoskeletal movements and corresponding soft tissue changes. Maxillary movements (measured at point A) averaged 8.77 ± 2.34 mm horizontally and 2.20 ± 2.42 mm vertically. Mandibular movements (measured at point B) averaged 11.16 ± 2.56 mm horizontally and 2.25 ± 3.02 mm vertically. The horizontal upper lip soft tissue–to–hard tissue ratios averaged >0.90:1 (SLS/A, 0.97:1; Ls/U1fac, 0.96:1; Stms/ls, 0.86:1). Upper lip length (Sn-Ls) increased by a clinically insignificant amount (0.37 mm). The nasolabial complex rotated in a counterclockwise rotation, with the nasolabial angle decreasing (3.87 degrees) due primarily to forward movement of the upper lip. Horizontal lower lip and chin soft tissue–to–hard tissue ratios averaged >0.90:1 (Stmi/li, 0.90:1; Li/Ii, 0.89:1; Pg′/Pg, 0.92:1; Me′/Me, 0.91:1). This study demonstrated that MMA in this selected group of OSA patients results in soft tissue movements producing a soft tissue–to–hard tissue ratio of about 0.90:1 for most anatomic sites of the upper lip, lower lip, and chin." @default.
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- W2067206893 date "2007-07-01" @default.
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- W2067206893 title "Facial Soft Tissue Changes Following Maxillomandibular Advancement for Treatment of Obstructive Sleep Apnea" @default.
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- W2067206893 doi "https://doi.org/10.1016/j.joms.2006.09.026" @default.
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