The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Hong-ju Park - One of the best experts on this subject based on the ideXlab platform.
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Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty in a patient with a transverse facial cleft
Maxillofacial Plastic and Reconstructive Surgery, 2019Co-Authors: Sung-hyuk Koh, Yeon-woo Jeong, Jeong Joon Han, Seunggon Jung, Min-suk Kook, Hong-ju ParkAbstract:Background Transverse facial clefts are Tessier’s number 7 facial cleft among numbers 1–15 in Tessier’s classification of craniofacial malformations, which varies from a simple widening oral commissure to a complete fissure extending towards the external ear. Case presentation In a patient with a transverse facial cleft, to functionally arrange the Orbicularis Oris Muscle and form the oral commissure naturally, we performed a surgical procedure including Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty. Conclusion We achieved good results functionally and esthetically by Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty. The surgical modality of our anatomical repair and 3 months follow-up results are presented.
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Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty in a patient with a transverse facial cleft
Maxillofacial plastic and reconstructive surgery, 2019Co-Authors: Sung-hyuk Koh, Yeon-woo Jeong, Jeong Joon Han, Seunggon Jung, Min-suk Kook, Hong-ju ParkAbstract:Transverse facial clefts are Tessier’s number 7 facial cleft among numbers 1–15 in Tessier’s classification of craniofacial malformations, which varies from a simple widening oral commissure to a complete fissure extending towards the external ear. In a patient with a transverse facial cleft, to functionally arrange the Orbicularis Oris Muscle and form the oral commissure naturally, we performed a surgical procedure including Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty. We achieved good results functionally and esthetically by Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty. The surgical modality of our anatomical repair and 3 months follow-up results are presented.
Zhengwen Zhang - One of the best experts on this subject based on the ideXlab platform.
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reconstruction of philtrum using partial splitting and folding of Orbicularis Oris Muscle in secondary unilateral cleft lip
Plastic and Reconstructive Surgery, 2015Co-Authors: Lei Li, Zhengwen ZhangAbstract:BACKGROUND: The reconstruction of the philtrum during unilateral cleft lip repair remains a surgical challenge. The authors introduce a modified surgical technique for the reconstruction of the philtrum that allows for both the deepening of the philtral dimple and augmentation of the philtral ridge. METHODS: Between January of 2011 and June of 2012, 37 patients, including 22 male and 15 female patients (mean age, 25.6 years), underwent secondary unilateral cleft lip repair. The philtrum was reconstructed by the partial splitting and folding of the Orbicularis Oris Muscle. The aesthetic outcome of the philtrum and the scar after the operation was scored to evaluate the effectiveness of the procedure. RESULTS: The patients were evaluated for the appearance of the philtrum and scar at 12 to 18 months (mean, 14.6 months). Good symmetry of the bilateral philtral ridges was achieved in 35 of the 37 patients, with the postoperative scores for aesthetic outcome being 2 to 4. The postoperative appearance of the scar in almost all cases was also significantly better than that before the operation. Only two patients showed widening of the philtral ridges and less prominent philtral ridges on the reconstructed side than on the normal side. CONCLUSIONS: The authors presented a new technique for the repair of the philtrum in patients with secondary unilateral cleft lip; the technique afforded good aesthetic outcomes in almost all cases.
Sung-hyuk Koh - One of the best experts on this subject based on the ideXlab platform.
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Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty in a patient with a transverse facial cleft
Maxillofacial Plastic and Reconstructive Surgery, 2019Co-Authors: Sung-hyuk Koh, Yeon-woo Jeong, Jeong Joon Han, Seunggon Jung, Min-suk Kook, Hong-ju ParkAbstract:Background Transverse facial clefts are Tessier’s number 7 facial cleft among numbers 1–15 in Tessier’s classification of craniofacial malformations, which varies from a simple widening oral commissure to a complete fissure extending towards the external ear. Case presentation In a patient with a transverse facial cleft, to functionally arrange the Orbicularis Oris Muscle and form the oral commissure naturally, we performed a surgical procedure including Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty. Conclusion We achieved good results functionally and esthetically by Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty. The surgical modality of our anatomical repair and 3 months follow-up results are presented.
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Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty in a patient with a transverse facial cleft
Maxillofacial plastic and reconstructive surgery, 2019Co-Authors: Sung-hyuk Koh, Yeon-woo Jeong, Jeong Joon Han, Seunggon Jung, Min-suk Kook, Hong-ju ParkAbstract:Transverse facial clefts are Tessier’s number 7 facial cleft among numbers 1–15 in Tessier’s classification of craniofacial malformations, which varies from a simple widening oral commissure to a complete fissure extending towards the external ear. In a patient with a transverse facial cleft, to functionally arrange the Orbicularis Oris Muscle and form the oral commissure naturally, we performed a surgical procedure including Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty. We achieved good results functionally and esthetically by Orbicularis Oris Muscle reconstruction and cheiloplasty with Z-plasty. The surgical modality of our anatomical repair and 3 months follow-up results are presented.
Mark P. Mooney - One of the best experts on this subject based on the ideXlab platform.
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Comparative microanatomy of the Orbicularis Oris Muscle between chimpanzees and humans: evolutionary divergence of lip function
Journal of anatomy, 2009Co-Authors: Carolyn Rogers, Seth M. Weinberg, Timothy D. Smith, Mark P. Mooney, Bridget M. Waller, Lisa A. Parr, Beth A. Docherty, Christopher J. Bonar, Lauren E. Reinholt, Frederic W.-b. DeleyiannisAbstract:The Orbicularis Oris Muscle plays a role in the production of primate facial expressions and vocalizations, nutrient intake, and in some non-human primates it is used as a prehensile, manipulative tool. As the chimpanzee (Pan troglodytes) is the closest living relative of humans, a comparison of the Orbicularis Oris Muscle between these species may increase our understanding of the morphological specializations related to the differing functional demands of their lips and the factors responsible for their divergent evolution. To this end, this study compares the microanatomy of the mid-line upper fibers of the Orbicularis Oris Muscle between chimpanzees and humans. A mid-line portion of the Orbicularis Oris Muscle was harvested from the upper lips of three chimpanzee and five human cadavers. The sampled blocks included the area between the lateral borders of the nasal alar cartilages in both species. Each sample was processed for paraffin histology, sectioned and stained with a variety of protocols. Sections were examined for fiber direction and relative thickness of Muscle layers. Ratios of cross-sectional connective tissue area vs. cross-sectional Muscle tissue area, Muscle fiber diameter and relative dermal thickness were calculated for each species. In both species, a clear pars marginalis layer was recognized, contrary to previous reports that only humans possess this layer. In chimpanzees, the relative fiber diameter and relative amount of Muscle tissue (i.e. based on ratio of connective tissue area : Muscle tissue area) were significantly (P < 0.05) greater than in humans. In contrast, measurements of relative dermal thickness showed that humans have a greater average dermal thickness of the upper lip than chimpanzees. Taken together, these results suggest that both human and chimpanzee Orbicularis Oris Muscle upper fibers meet the specific functional demands associated with their divergent vocal and facial display repertoires, the development of human speech, and the use of the upper lip as a prehensile tool in chimpanzees.
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Anatomical basis for apparent subepithelial cleft lip: a histological and ultrasonographic survey of the Orbicularis Oris Muscle.
The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association, 2007Co-Authors: Carolyn Rogers, Seth M. Weinberg, Timothy D. Smith, Frederic W.-b. Deleyiannis, Mark P. Mooney, Mary L. MarazitaAbstract:Abstract Objective: To determine if there is an anatomic basis for subepithelial Orbicularis Oris Muscle defects by directly comparing ultrasonographic images of the upper lip with corresponding histological sections obtained from cadavers. Methods: Ultrasound was performed on the upper lips of previously frozen, unpreserved cadaver heads (n = 32), followed by dissection and sectioning of the upper lips. The ultrasound sequences were scored by a panel of raters, classifying the Orbicularis Oris Muscle as negative, positive, or unknown for the presence of an Orbicularis Oris discontinuity (subepithelial defect). Based on ultrasound, six lip specimens were chosen for histological sectioning, were stained with hematoxylin-eosin and Gomori trichrome stain, and were evaluated with light microscopy at low (8×) and intermediate (100×) magnification. Results: One cadaver was scored positive for an Orbicularis Oris Muscle discontinuity based on ultrasound; whereas, the remaining cadavers were scored negative. Of...
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Orbicularis Oris Muscle defects as an expanded phenotypic feature in nonsyndromic cleft lip with or without cleft palate.
American journal of medical genetics. Part A, 2007Co-Authors: Katherine Neiswanger, Seth M. Weinberg, Frederic W.-b. Deleyiannis, Carolyn R Rogers, Carla A Brandon, Margaret E Cooper, Kathleen M Bardi, Judith M Resick, A'delbert Bowen, Mark P. MooneyAbstract:Nonsyndromic cleft lip+/-cleft palate is a complex disease with a wide phenotypic spectrum; occult defects of the superior Orbicularis Oris Muscle may represent the mildest subclinical form of the lip portion of the phenotype. This study used high-resolution ultrasonography to compare the frequency of discontinuities in the OO Muscle in 525 unaffected relatives of individuals with nonsyndromic cleft lip+/-cleft palate versus 257 unaffected controls. OO Muscle discontinuities were observed in 54 (10.3%) of the non-cleft relatives, compared to 15 (5.8%) of the controls-a statistically significant increase (P=0.04). Male relatives had a significantly higher rate of discontinuities than male controls (12.0% vs. 3.2%; P=0.01); female relatives also had a higher rate of discontinuities than female controls, but the increase was not statistically significant (8.9% vs. 7.4%; P=0.56). These data confirm the hypothesis that subepithelial OO Muscle defects are a mild manifestation of the cleft lip phenotype. Identification of subepithelial OO Muscle defects may be important in a clinical setting, as a means of providing more accurate recurrence risk estimates to relatives in cleft families. Furthermore, the expansion of the cleft lip+/-cleft palate phenotypic spectrum should improve the power of genetic studies.
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Orbicularis Oris Muscle defects as an expanded phenotypic feature in nonsyndromic cleft lip with or without cleft palate.
American Journal of Medical Genetics Part A, 2007Co-Authors: Katherine Neiswanger, Carolyn Rogers, Seth M. Weinberg, Frederic W.-b. Deleyiannis, Carla A Brandon, Margaret E Cooper, Judith M Resick, A'delbert Bowen, Kathleen Bardi, Mark P. MooneyAbstract:Nonsyndromic cleft lip ± cleft palate is a complex disease with a wide phenotypic spectrum; occult defects of the superior Orbicularis Oris Muscle may represent the mildest subclinical form of the lip portion of the phenotype. This study used high-resolution ultrasonography to compare the frequency of discontinuities in the OO Muscle in 525 unaffected relatives of individuals with nonsyndromic cleft lip ± cleft palate versus 257 unaffected controls. OO Muscle discontinuities were observed in 54 (10.3%) of the non-cleft relatives, compared to 15 (5.8%) of the controls—a statistically significant increase (P = 0.04). Male relatives had a significantly higher rate of discontinuities than male controls (12.0% vs. 3.2%; P = 0.01); female relatives also had a higher rate of discontinuities than female controls, but the increase was not statistically significant (8.9% vs. 7.4%; P = 0.56). These data confirm the hypothesis that subepithelial OO Muscle defects are a mild manifestation of the cleft lip phenotype. Identification of subepithelial OO Muscle defects may be important in a clinical setting, as a means of providing more accurate recurrence risk estimates to relatives in cleft families. Furthermore, the expansion of the cleft lip ± cleft palate phenotypic spectrum should improve the power of genetic studies. © 2007 Wiley-Liss, Inc.
Hyun Nam Choi - One of the best experts on this subject based on the ideXlab platform.
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a new method for creating a definite philtrum by the flipping of an Orbicularis Oris Muscle flap in a patient with an indistinct philtrum
Archives of Plastic Surgery, 2013Co-Authors: Hyun Nam ChoiAbstract:The philtrum plays a key role in the appearance of the upper lip and nostril sill. Therefore, construction of the philtrum is crucial for attaining a natural appearance of the upper lip. We used a flipping myoplasty of the Orbicularis Oris Muscle on a patient with a flat philtrum in order to effectively reconstruct the philtral dimple and column. A 35-year-old female presented to our department with the complaint of a flat upper lip. A superficial layer of the Orbicularis Oris Muscle on the median aspect of the upper lip was vertically incised and elevated to a thickness of 2 mm. Both sides of the elevated Muscle flap were then folded to the lateral sides so that the border could be sutured onto the outer portion of the Orbicularis Oris Muscle. The patient was observed for one year postoperatively. Her philtrum deepened by 1.25 mm, with the central angle of her Cupid's bow improving from a preoperative measurement of 146° to 128° postoperatively. In a patient with an indistinct philtrum, a flipping Orbicularis Oris myoplasty was performed to attain a definite philtral column and a philtral dimple. Natural upper lip movement was maintained, and an aesthetically and functionally satisfactory reconstruction was achieved.