The Experts below are selected from a list of 72 Experts worldwide ranked by ideXlab platform
Hee Jin Kim - One of the best experts on this subject based on the ideXlab platform.
-
frontal branch of the superficial temporal artery anatomical study and clinical implications regarding injectable treatments
Surgical and Radiologic Anatomy, 2015Co-Authors: Jae Gi Lee, Hunmu Yang, Young Il Lee, Hyung Jin Lee, You Jin Choi, Hee Jin KimAbstract:Background The frontal branch of the superficial temporal artery (Fbr) is vulnerable to damage triggered by iatrogenic manipulation by both dermal filler and BoNT-A injection. The purpose of this study was to elucidate the branching pattern of Fbr and to determine its location and course on the lateral border of the frontal belly of the Occipitofrontalis Muscle (FB).
-
Frontal branch of the superficial temporal artery: anatomical study and clinical implications regarding injectable treatments
Surgical and Radiologic Anatomy, 2015Co-Authors: Jae Gi Lee, Hunmu Yang, Young Il Lee, Hyung Jin Lee, You Jin Choi, Hee Jin KimAbstract:Background The frontal branch of the superficial temporal artery (Fbr) is vulnerable to damage triggered by iatrogenic manipulation by both dermal filler and BoNT-A injection. The purpose of this study was to elucidate the branching pattern of Fbr and to determine its location and course on the lateral border of the frontal belly of the Occipitofrontalis Muscle (FB). Methods Sixty-four hemifaces from 38 Korean cadavers (26 males and 12 females; mean age 71.9 years) were dissected, and the location and course of the Fbr were identified with reference to the lateral border of the FB. Results The ramification of the frontal branch from the superficial temporal artery (STA) occurred 36.9 ± 14.24 mm (mean ± SD) superior and 17.2 ± 8.2 mm anterior to the posterior-most point of the tragus [i.e., tragion (Tg)]. The Fbr was observed as a single branch in 96.9 % of cases and reached its destination at a single point in 71.9 %. It reached the Fbr 14.8 ± 7.7 mm superior to the uppermost point of the eyebrow and 15.8 ± 9.1 mm from the lateral epicanthus. The Fbr bifurcated into superior and inferior branches before reaching the FB in 25.0 % of cases. In two cases (3 %), the Fbr ramified from the STA within 1 mm of the Tg. The diameter of the superior division of Fbr was 1.6 ± 0.5 mm at the lateral border of the FB and 1.8 ± 0.6 mm at other locations. Conclusion Physicians performing injection treatments such as botulinum toxin type A and dermal filler injection to the posterior frontal area should be aware of the various distributions of the Fbr.
Jorge M. Andrews - One of the best experts on this subject based on the ideXlab platform.
-
Frontal reconstruction with frontal musculocutaneous V-Y island flap.
Plastic and reconstructive surgery, 2007Co-Authors: Lorenzo S. Rocha, Geruza Rezende Paiva, Luiz C. De Oliveira, Joel Veiga Filho, Ivan Dunshee Abranches De Oliveira Santos, Jorge M. AndrewsAbstract:Background: Defects of the frontal region are mostly caused by the ablation of tumors. When the treatment of such a defect cannot be achieved by the approximation of its margins, some of the solutions may alter the form or the continuity of the frontal aesthetic unit. Methods: With the intent of reconstructing frontal defects with proper skin, a musculocutaneous island flap of the frontal belly of the Occipitofrontalis Muscle based on the supratrochlearis or the supraorbitalis vessels was planned for a V-Y application in a single procedure. It was used in 31 patients. Results: The treated frontal defects ranged from 1.5 per 1.5 cm to 4.5 per 5.5 cm and, depending on the depth of the resection, exposed periosteum, bone, or dura mater. All the vessels were identified and preserved and the flaps were viable and sufficient for the defects. Three cases presented 1 cm 2 of superficial skin necrosis with spontaneous healing that caused hypochromic scars. In eight patients the extirpation of the tumor compromised the rami temporales of the nervus facialis and caused postoperative asymmetry of the facial mimicking. All the followed patients presented normal sensitivity to touch stimuli on the flap skin and presented loss of sensitivity on the scalp distally to the flap and to the donor site. Conclusion: The frontal musculocutaneous island V-Y flap based on the supratrochlearis or the supraorbitalis vessels is safe and permits frontal reconstruction in a single procedure with proper maintenance of the aesthetic unit.
Eugene W. Roberts - One of the best experts on this subject based on the ideXlab platform.
-
Open Access The Aponeurotic Tension Model of Craniofacial Growth in Man
2016Co-Authors: Richard G Standerwick, Eugene W. RobertsAbstract:Abstract: Craniofacial growth is a scientific crossroad for the fundamental mechanisms of musculoskeletal physiology. Better understanding of growth and development will provide new insights into repair, regeneration and adaptation to ap-plied loads. Traditional craniofacial growth concepts are insufficient to explain the dynamics of airway/vocal tract devel-opment, cranial rotation, basicranial flexion and the role of the cranial base in expression of facial proportions. A testable hypothesis is needed to explore the physiological pressure propelling midface growth and the role of neural factors in ex-pression of musculoskeletal adaptation after the cessation of anterior cranial base growth. A novel model for craniofacial growth is proposed for: 1. brain growth and craniofacial adaptation up to the age of 20; 2. explaining growth force vectors; 3. defining the role of Muscle plasticity as a conduit for craniofacial growth forces; and 4. describing the effect of cranial rotation in the expression of facial form. Growth of the viscerocranium is believed to be influenced by the superficial musculoaponeurotic systems (SMAS) of the head through residual tension in the Occipitofrontalis Muscle as a result of cephalad brain growth and cranial rotation. The coordinated effects of the regional SMAS develop a craniofacial musculoaponeurotic system (CFMAS), which is believed to affect maxillary and mandibular development
-
The Aponeurotic Tension Model of Craniofacial Growth in Man Open Access
2013Co-Authors: Eugene W. RobertsAbstract:Abstract: Craniofacial growth is a scientific crossroad for the fundamental mechanisms of musculoskeletal physiology. Better understanding of growth and development will provide new insights into repair, regeneration and adaptation to applied loads. Traditional craniofacial growth concepts are insufficient to explain the dynamics of airway/vocal tract development, cranial rotation, basicranial flexion and the role of the cranial base in expression of facial proportions. A testable hypothesis is needed to explore the physiological pressure propelling midface growth and the role of neural factors in expression of musculoskeletal adaptation after the cessation of anterior cranial base growth. A novel model for craniofacial growth is proposed for: 1. brain growth and craniofacial adaptation up to the age of 20; 2. explaining growth force vectors; 3. defining the role of Muscle plasticity as a conduit for craniofacial growth forces; and 4. describing the effect of cranial rotation in the expression of facial form. Growth of the viscerocranium is believed to be influenced by the superficial musculoaponeurotic systems (SMAS) of the head through residual tension in the Occipitofrontalis Muscle as a result of cephalad brain growth and cranial rotation. The coordinated effects of the regional SMAS develop a craniofacial musculoaponeurotic system (CFMAS), which is believed to affect maxillary and mandibular development
Jae Gi Lee - One of the best experts on this subject based on the ideXlab platform.
-
frontal branch of the superficial temporal artery anatomical study and clinical implications regarding injectable treatments
Surgical and Radiologic Anatomy, 2015Co-Authors: Jae Gi Lee, Hunmu Yang, Young Il Lee, Hyung Jin Lee, You Jin Choi, Hee Jin KimAbstract:Background The frontal branch of the superficial temporal artery (Fbr) is vulnerable to damage triggered by iatrogenic manipulation by both dermal filler and BoNT-A injection. The purpose of this study was to elucidate the branching pattern of Fbr and to determine its location and course on the lateral border of the frontal belly of the Occipitofrontalis Muscle (FB).
-
Frontal branch of the superficial temporal artery: anatomical study and clinical implications regarding injectable treatments
Surgical and Radiologic Anatomy, 2015Co-Authors: Jae Gi Lee, Hunmu Yang, Young Il Lee, Hyung Jin Lee, You Jin Choi, Hee Jin KimAbstract:Background The frontal branch of the superficial temporal artery (Fbr) is vulnerable to damage triggered by iatrogenic manipulation by both dermal filler and BoNT-A injection. The purpose of this study was to elucidate the branching pattern of Fbr and to determine its location and course on the lateral border of the frontal belly of the Occipitofrontalis Muscle (FB). Methods Sixty-four hemifaces from 38 Korean cadavers (26 males and 12 females; mean age 71.9 years) were dissected, and the location and course of the Fbr were identified with reference to the lateral border of the FB. Results The ramification of the frontal branch from the superficial temporal artery (STA) occurred 36.9 ± 14.24 mm (mean ± SD) superior and 17.2 ± 8.2 mm anterior to the posterior-most point of the tragus [i.e., tragion (Tg)]. The Fbr was observed as a single branch in 96.9 % of cases and reached its destination at a single point in 71.9 %. It reached the Fbr 14.8 ± 7.7 mm superior to the uppermost point of the eyebrow and 15.8 ± 9.1 mm from the lateral epicanthus. The Fbr bifurcated into superior and inferior branches before reaching the FB in 25.0 % of cases. In two cases (3 %), the Fbr ramified from the STA within 1 mm of the Tg. The diameter of the superior division of Fbr was 1.6 ± 0.5 mm at the lateral border of the FB and 1.8 ± 0.6 mm at other locations. Conclusion Physicians performing injection treatments such as botulinum toxin type A and dermal filler injection to the posterior frontal area should be aware of the various distributions of the Fbr.
Rafael Tellez-segura - One of the best experts on this subject based on the ideXlab platform.
-
Involvement of mechanical stress in androgenetic alopecia
International journal of trichology, 2015Co-Authors: Rafael Tellez-seguraAbstract:Androgenetic alopecia (AGA) is a frequent disorder characterized by progressive hair miniaturization in a very similar pattern among all affected men. The pathogenesis is related to androgen-inducible overexpression of transforming growth factor β-1 from balding dermal papilla cells, which is involved in epithelial inhibition and perifollicular fibrosis. Recent research shows that hair follicle androgen sensitivity is regulated by Hic-5, an androgen receptor co-activator which may be activated by the mechanical stimulation. Moreover, the dermis of scalp susceptible to be affected by AGA is firmly bounded to the galea aponeurotica, so the physical force exerted by the Occipitofrontalis Muscle is transmitted to the scalp skin.To know whether mechanical stress supported by hair follicles is involved in AGA phenomenon.It is performed with a finite element analysis of a galea model and a schematic representation of AGA progression according to Hamilton-Norwood scale in order to establish the correlation between elastic deformation in scalp and clinical progression of male pattern baldness.The result was a highly significant correlation (r: -0.885, P < 0.001) that clearly identifies a mechanical factor in AGA development.All these data suggest that mechanical stress determines AGA patterning and a stretch-induced and androgen-mediated mechanotransduction in dermal papilla cells could be the primary mechanism in AGA pathogenesis.
