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Hung KF, Lin KP. Bio-Inspired Dark Adaptive Nighttime Object Detection. Biomimetics (Basel) 2024; 9:158. [PMID: 38534843 DOI: 10.3390/biomimetics9030158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/26/2024] [Accepted: 02/28/2024] [Indexed: 03/28/2024] Open
Abstract
Nighttime object detection is challenging due to dim, uneven lighting. The IIHS research conducted in 2022 shows that pedestrian anti-collision systems are less effective at night. Common solutions utilize costly sensors, such as thermal imaging and LiDAR, aiming for highly accurate detection. Conversely, this study employs a low-cost 2D image approach to address the problem by drawing inspiration from biological dark adaptation mechanisms, simulating functions like pupils and photoreceptor cells. Instead of relying on extensive machine learning with day-to-night image conversions, it focuses on image fusion and gamma correction to train deep neural networks for dark adaptation. This research also involves creating a simulated environment ranging from 0 lux to high brightness, testing the limits of object detection, and offering a high dynamic range testing method. Results indicate that the dark adaptation model developed in this study improves the mean average precision (mAP) by 1.5-6% compared to traditional models. Our model is capable of functioning in both twilight and night, showcasing academic novelty. Future developments could include using virtual light in specific image areas or integrating with smart car lighting to enhance detection accuracy, thereby improving safety for pedestrians and drivers.
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Affiliation(s)
- Kuo-Feng Hung
- Electrical Engineering Department, Chung Yuan Christian University, Taoyuan City 320314, Taiwan
| | - Kang-Ping Lin
- Electrical Engineering Department, Chung Yuan Christian University, Taoyuan City 320314, Taiwan
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Wu YJ, Su TR, Chang CI, Chen CR, Hung KF, Liu C. (+)-Bornyl p-Coumarate Extracted from Stem of Piper betle Induced Apoptosis and Autophagy in Melanoma Cells. Int J Mol Sci 2020; 21:ijms21103737. [PMID: 32466337 PMCID: PMC7279146 DOI: 10.3390/ijms21103737] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/11/2020] [Accepted: 05/19/2020] [Indexed: 12/27/2022] Open
Abstract
(+)-Bornyl p-coumarate is an active substance that is abundant in the Piper betle stem and has been shown to possess bioactivity against bacteria and a strong antioxidative effect. In the current study, we examined the actions of (+)-bornyl p-coumarate against A2058 and A375 melanoma cells. The inhibition effects of (+)-bornyl p-coumarate on these cell lines were assessed by 3-(4,5-Dimethylthiazol-2-yl)-2,5- diphenyltetrazolium bromide (MTT) assay and the underlying mechanisms were identified by immunostaining, flow cytometry and western blotting of proteins associated with apoptosis and autophagy. Our results demonstrated that (+)-bornyl p-coumarate inhibited melanoma cell proliferation and caused loss of mitochondrial membrane potential, demonstrating treatment induced apoptosis. In addition, western blotting revealed that the process is mediated by caspase-dependent pathways, release of cytochrome C, activation of pro-apoptotic proteins (Bax, Bad and caspase-3/-9) and suppression of anti-apoptotic proteins (Bcl-2, Bcl-xl and Mcl-1). Also, the upregulated expressions of p-PERK, p-eIF2α, ATF4 and CCAAT/enhancer-binding protein (C/EBP)-homologous protein (CHOP) after treatment indicated that (+)-bornyl p-coumarate caused apoptosis via endoplasmic reticulum (ER) stress. Moreover, increased expressions of beclin-1, Atg3, Atg5, p62, LC3-I and LC3-II proteins and suppression by autophagic inhibitor 3-methyladenine (3-MA), indicated that (+)-bornyl p-coumarate triggered autophagy in the melanoma cells. In conclusion, our findings demonstrated that (+)-bornyl p-coumarate suppressed human melanoma cell growth and should be further investigated with regards to its potential use as a chemotherapy drug for the treatment of human melanoma.
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Affiliation(s)
- Yu-Jen Wu
- Department of Beauty Science, Meiho University, Pingtung 91202, Taiwan;
- Department of Food and Nutrition, Meiho University, Pingtung 91202, Taiwan
| | - Tzu-Rong Su
- Antai Medical Care Corporation, Antai Tian-Sheng Memorial Hospital, Pingtung 92842, Taiwan;
| | - Chi-I Chang
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan;
| | - Chiy-Rong Chen
- Department of Life Science, National Taitung University, Taitung 95002, Taiwan;
| | - Kuo-Feng Hung
- Yu Jun Biotechnology Co., Ltd., Kaoshiung 91363, Taiwan;
| | - Cheng Liu
- Department of Dental Technology, Shu-Zen Junior College of Medicine and Management, Kaoshiung 82144, Taiwan
- Department of Health Beauty, Shu-Zen Junior College of Medicine and Management, Kaoshiung 82144, Taiwan
- Correspondence: ; Tel.: +886-8-779-9821 (ext. 8398)
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Song YC, Hung KF, Liang KL, Chiang JH, Huang HC, Lee HJ, Wu MY, Yu SJ, Lo HY, Ho TY, Yen HR. Adjunctive Chinese herbal medicine therapy for nasopharyngeal carcinoma: Clinical evidence and experimental validation. Head Neck 2019; 41:2860-2872. [PMID: 30985039 DOI: 10.1002/hed.25766] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/13/2019] [Accepted: 03/25/2019] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND To investigate the benefits of adjunctive Chinese herbal medicine (CHM) for patients with nasopharyngeal carcinoma (NPC). METHODS We included all patients diagnosed with NPC during 1997-2009 and followed until 2011 in Taiwan. We used 1:1 frequency matching by age, sex, comorbidity, conventional treatment, and index year to compare the CHM users and non-CHM users (n = 2542 each). The prescribed CHM was further investigated with regard to its cytotoxicity. RESULTS Compared with non-CHM users, adjunctive CHM users had a lower hazard ratio of mortality risk, and a better survival probability. Gan-Lu-Yin (GLY) was the most commonly prescribed CHM, and it reduced cell viability, inhibited tumor proliferation, and induced apoptosis through the poly (ADP-ribose) polymerase and caspase-3-dependent pathway in human NPC TW01 cells. Oral administration of GLY retarded NPC-TW01 tumor growth in the xenograft nude mouse model. CONCLUSION Real-world data and laboratory experiments implied that adjunctive CHM might be beneficial for NPC patients.
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Affiliation(s)
- Ying-Chyi Song
- Research Center for Chinese Herbal Medicine, China Medical University, Taichung, Taiwan.,Chinese Medicine Research Center, China Medical University, Taichung, Taiwan.,Research Center for Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Kuo-Feng Hung
- Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Kai-Li Liang
- Department of Otolaryngology, Taichung Veterans General Hospital, Taichung, Taiwan.,School of Medicine, Chung Shan Medical University, Taichung, Taiwan.,Faculty of Medicine, National Yang-Ming Medical University, Taipei, Taiwan
| | - Jen-Huai Chiang
- Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan
| | - Hui-Chi Huang
- Research Center for Chinese Herbal Medicine, China Medical University, Taichung, Taiwan.,Chinese Medicine Research Center, China Medical University, Taichung, Taiwan.,Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Hui-Ju Lee
- Research Center for Chinese Herbal Medicine, China Medical University, Taichung, Taiwan.,Chinese Medicine Research Center, China Medical University, Taichung, Taiwan.,Research Center for Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Mei-Yao Wu
- Research Center for Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Sheng-Jie Yu
- Research Center for Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Hsin-Yi Lo
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Tin-Yun Ho
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Hung-Rong Yen
- Research Center for Chinese Herbal Medicine, China Medical University, Taichung, Taiwan.,Chinese Medicine Research Center, China Medical University, Taichung, Taiwan.,Research Center for Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan.,School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan.,Department of Biotechnology, Asia University, Taichung, Taiwan
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Hung KF, Ai QY, Fan SC, Wang F, Huang W, Wu YQ. Measurement of the zygomatic region for the optimal placement of quad zygomatic implants. Clin Implant Dent Relat Res 2017; 19:841-848. [PMID: 28766912 DOI: 10.1111/cid.12524] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Revised: 07/01/2017] [Accepted: 07/09/2017] [Indexed: 02/05/2023]
Abstract
BACKGROUND The zygomatic implant is suggested to be placed in zygomatic areas with the largest thickness, but regions to obtain the largest bone-to-implant contact (BIC) were unknown. PURPOSE To identify the zygomatic regions for placing quad zygomatic implants that obtain the largest BIC. MATERIALS AND METHODS The zygomatic thicknesses of 300 zygomata were measured at total 12 points on the superior, middle, and inferior areas on the 3-dimensional reconstruction images. In 50 edentulous maxillae, the zygomatic BICs of virtually placed implants were measured and the incidence of the intrusion into the infratemporal fossa calculated at each point. RESULTS The largest thickness in the superior, middle, and inferior regions were at Point A1 (8.01 ± 2.10 mm), Point B1 (7.02 ± 1.73 mm), and Point C0 (6.65 ± 1.66 mm), respectively. The virtually placed implants at Point A3 (16.70 ± 4.18 mm) and Point B1 (12.07 ± 3.84 mm) had the highest BICs while retaining the minimum incidence of the intrusion complications. CONCLUSION To obtain the largest BICs and avoid the intrusion complications, results suggested that the postero-superior region (Point A3 ) and the center of zygoma (Point B1 ) were the optimal places for the placement of quad zygomatic implants.
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Affiliation(s)
- Kuo-Feng Hung
- Department of Oral-Maxillofacial Implantology, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 200011, China
| | - Qi-Yong Ai
- Department of Imaging and Interventional Radiology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, S.A.R. China
| | - Sheng-Chi Fan
- Department of Oral-Maxillofacial Implantology, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 200011, China
| | - Feng Wang
- Department of Oral-Maxillofacial Implantology, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 200011, China
| | - Wei Huang
- Department of Oral-Maxillofacial Implantology, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 200011, China
| | - Yi-Qun Wu
- Department of Oral-Maxillofacial Implantology, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 200011, China
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Hung KF, Hsu CP, Chiang JH, Lin HJ, Kuo YT, Sun MF, Yen HR. Complementary Chinese herbal medicine therapy improves survival of patients with gastric cancer in Taiwan: A nationwide retrospective matched-cohort study. J Ethnopharmacol 2017; 199:168-174. [PMID: 28163114 DOI: 10.1016/j.jep.2017.02.004] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 02/01/2017] [Accepted: 02/01/2017] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Many patients with gastric cancer seek traditional medicine consultations in Asian countries. This study aimed to investigate the prescription of Chinese herbal medicine (CHM) and its benefits for the patients with gastric cancer in Taiwan. METHODS From the Registry for Catastrophic Illness Patients Database, we included all patients with gastric cancer whose age at diagnosis was ≥18 from 1997 to 2010 in Taiwan. We used 1:1 frequency matching by age, sex, Charlson comorbidity score, treatment and index year to compare the CHM users and non-CHM users. We used the Cox regression model to compare the hazard ratios (HR) for the risk of mortality and the Kaplan-Meier curve for the survival time. RESULTS There was a total of 1333 patients in the CHM-cohort and 44786 patients in the non-CHM cohort. After matching, we compared 962 newly diagnosed CHM users and 962 non-CHM users. Adjusted HRs (aHR) were higher among patients of above 60-year-old group, with a Charlson Comorbidity Index score ≥2 before the index date, and those who need surgery combined with chemotherapy or radiotherapy. CHM users had a lower HR of mortality risk (adjusted HR: 0.55, 95% CI: 0.48-0.62). Compared to the non-CHM users, the aHR among CHM-users is 0.37 (95% CI:0.2-0.67) for those who used CHM more than 180 days annually. The Kaplan-Meier curve revealed that the survival probability was higher for complementary CHM-users. Bai-Hua-She-She-Cao (Herba Hedyotidis Diffusae) was the most commonly used single herb and Xiang-Sha-Liu-Jun-Zi-Tang was the most commonly used herbal formula among CHM prescriptions. CONCLUSIONS Complementary CHM improves the overall survival among patients with gastric cancer in Taiwan. Further ethnopharmacological investigations and clinical trials are required to validate the efficacy and safety.
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Affiliation(s)
- Kuo-Feng Hung
- Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Ching-Ping Hsu
- Department of Family Physicians, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Jen-Huai Chiang
- Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan; Research Center for Chinese Medicine & Acupuncture, China Medical University, Taichung, Taiwan
| | - Hung-Jen Lin
- Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan; School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Yi-Ting Kuo
- Graduate Institute of Chinese Medicine, School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Department of Chinese Medicine, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan
| | - Mao-Feng Sun
- Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan; Graduate Institute of Chinese Medicine, School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Hung-Rong Yen
- Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan; Research Center for Chinese Medicine & Acupuncture, China Medical University, Taichung, Taiwan; Graduate Institute of Chinese Medicine, School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Research Center for Chinese Herbal Medicine, China Medical University, Taichung, Taiwan; Research Center for Traditional Chinese Medicine, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.
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Ho KY, Huang HH, Hung KF, Chen JC, Chai CY, Chen WT, Tsai SM, Chien CY, Wang HM, Wu YJ. Cholesteatoma growth and proliferation: relevance with serpin B3. Laryngoscope 2013; 122:2818-23. [PMID: 23239141 DOI: 10.1002/lary.23547] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2012] [Indexed: 11/06/2022]
Abstract
OBJECTIVES/HYPOTHESIS The mechanisms of cholesteatoma proliferation and growth remain unclear. The objective of this study is to discover the potential mechanisms of the proliferation and growth of cholesteatoma by direct experimental assessments on cholesteatoma tissues from patients. STUDY DESIGN Retrospective study by the comparisons between cholesteatoma tissues and retroauricular skin tissues from the patients. METHODS Two-dimensional gel electrophoresis, LC-MS/MS analysis and immunohistochemistry were performed to investigate specific protein expression in cholesteatoma tissues compared with retroauricular skin tissues collected from the patients. Western blotting analysis was conducted to verify the regulation of specific proteins found by 2-DE, and to determine the changes of associated potential modulators in cholesteatoma proliferation and growth. RESULTS Twelve serpin B3 isoforms were found by 2-DE and identified by LC-MS/MS analysis, which is coherent with the results exhibited by immunohistochemistry and western blot. Up-regulation of STAT3 and down-regulations of cathepsin K and cathepsin L were represented using western blot. CONCLUSIONS The data in this study suggested serpin B3, STAT3, cathepsin K, and cathepsin L are associated with the proliferation and growth of cholesteatoma, and these proteins may be influential factors in cholesteatoma growth.
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Affiliation(s)
- Kuen-Yao Ho
- Department of Otolaryngology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Taiwan
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Chang SC, Lo LJ, Hung KF, Chen KT, Chen YR, Noordhoff MS. Maxillary growth after palatal denudation: an animal experiment. Changgeng Yi Xue Za Zhi 1999; 22:378-85. [PMID: 10584408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
BACKGROUND Palate surgery at an early age may cause retardation of maxillary growth. The second intention healing of the raw bone surface created on the palate is considered to be the cause of the growth retardation. The animal experiment in this study was designed to evaluate this effect. METHODS Four-week-old Sprague-Dawley rats were divided into 3 groups. In the first group, a strip of mucoperiosteum was excised on both sides of the hard palate. A second group of rats received a sham surgery in which bilateral mucoperiosteal flaps were raised and redraped. The third group served as controls with no surgery. Flap elevation with and without excision was performed under an operative microscope to facilitate the delicate manipulation of tissue and to avoid injury to the underlying bone. The animals were killed 11 weeks later and the skulls were prepared for measurements, which included the palatal inter-molar width, maxillary height, and maxillary length. RESULTS The results revealed statistically significant decreases in palatal width and maxillary length in the experimental group (excision of mucoperiosteum). No differences were observed in the vertical height of the maxilla. CONCLUSION This study confirms that surgically created bone denudation of the palate causes maxillary growth disturbances.
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Affiliation(s)
- S C Chang
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Taipei, Taiwan, R.O.C
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Polley JW, Hung KF, Figueroa A, Lakars T, Heiberger H. Alternative techniques in rigid fixation of the craniomaxillofacial skeleton. J Craniofac Surg 1998; 9:249-53. [PMID: 9693558 DOI: 10.1097/00001665-199805000-00014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Rigid fixation techniques in pediatric craniofacial surgery have enhanced our clinical results by offering greater stabilization and control of bone grafts and osteotomized free segments of the craniofacial skeleton. A potential disadvantage of rigid fixation techniques in the growing craniofacial skeleton includes possible long-term growth restrictions, which have been demonstrated in various animal models. Our goal was to evaluate alternative fixation techniques in the growing craniofacial skeleton of the rabbit to study how altering fixation techniques affects craniofacial development. Eighty New Zealand White rabbits were used in this study. Rabbits were divided into eight groups of 10 each, and seven variant fixation techniques were used to stabilize the frontal bones after bifrontal craniectomies. In all groups except Group 1, the animals underwent a bifrontal craniectomy with orthotopic replacement of the frontal bones. Fixation for each group was as follows: Group 2, wire; Group 3, full microplate; Group 4, suture; Group 5, microplate removal at 4 weeks; Group 6, anterior plate; Group 7, posterior plate; Group 8, soft plate. It was demonstrated that long-term effects on craniofacial development in this animal model are significantly influenced by the type and location of rigid fixation hardware. Significant differences in growth of the craniofacial skeleton for the different fixation groups are presented and discussed.
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Affiliation(s)
- J W Polley
- Heckton Institute, Cook County Hospital, Chicago, IL USA
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Abstract
Many surgeons have favored using the pharyngeal flap as the primary treatment for the velopharyngeal insufficiency associated with submucous cleft palate. However, the increasing number of reports of sleep apnea and airway compromise as a result pharyngeal flap surgery support the need to eliminate any unnecessary pharyngeal flap surgery. From 1988 to 1993, 35 Chinese submucous cleft palate patients with velopharyngeal insufficiency received surgery. A Furlow palatoplasty was used in 30 patients (3 to 26 years old). The follow-up duration was 9 months to 5 1/2 years. These patients were selected after a thorough study for velopharyngeal insufficiency including intraoral examination, perceptual speech assessment, videonasopharyngoscopy, and/or multiview videofluoroscopy. The criteria for selection included age, intraoral finding of an obviously anterior inserted levator palatine muscle, size of velopharyngeal gap, pattern of velopharyngeal closure, degree of lateral pharyngeal wall movement, and response to biofeedback speech therapy. In general, younger patients with circular or sagittal pattern closure, a velopharyngeal gap less than 5 mm, or good response to biofeedback speech therapy were considered to be the best candidates for a Furlow palatoplasty. The 5 patients who did not fulfill these criteria and whose velopharyngeal function failed to improve on preoperative biofeedback therapy were treated by pharyngeal flap operation. Twenty-nine patients (96.7 percent) achieved competent velopharyngeal function after the Furlow palatoplasty. The procedure corrected the velopharyngeal insufficiency in 3 patients older than 20 years with a velopharyngeal gap of less than 2 mm. The only patient with an unsatisfactory result was a 26-year old woman who had very prominent action of the musculus uvulae before the surgery. The results show that a Furlow palatoplasty can satisfactorily correct velopharyngeal insufficiency in carefully selected submucous cleft palate patients and thus avoid the serious complications of pharyngeal flap surgery.
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Affiliation(s)
- P K Chen
- Craniofacial Center, Chang Gung Memorial Hospital, Taipei, Taiwan
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Abstract
Rigid microfixation has enhanced the immediate results in pediatric craniomaxillofacial surgery. The effects of rigid fixation on the development of the craniofacial skeleton, however, remain uncertain. The long-term effects of rigid microfixation on the growing craniofacial skeleton in the rabbit model were evaluated in this study. Bifrontal craniectomies were preformed in 9-day-old rabbits. The frontal bones were replaced orthotopically and fixed both anteriorly and posteriorly with either wire osteosynthesis or titanium microplates and screws. The animals were allowed to grow to craniofacial maturity, and craniofacial development was evaluated with both cephalometric and craniometric analyses. All data were statistically analyzed through analysis of variance. Regional adverse growth effects on the craniofacial skeleton with the use of both wire and rigid fixation were observed. The adverse effects were greatest with the use of rigid fixation.
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Affiliation(s)
- J W Polley
- Division of Plastic and Reconstructive Surgery, Cook County Hospital, Illinois, USA
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Polley JW, Cohen M, Hung KF, Franz FP. Form-fitting fixation. J Craniofac Surg 1994; 5:195-200. [PMID: 7803593 DOI: 10.1097/00001665-199407000-00012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Use of rigid fixation systems in craniomaxillofacial surgery has significantly improved clinical results. We describe the technical application of utilizing rigid fixation systems in the actual process of reshaping bone flaps and grafts. We call the use of this technique form-fitting fixation, and describe its application in a wide variety of craniofacial reconstructions.
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Affiliation(s)
- J W Polley
- University of Illinois Hospital, Chicago, Illinois
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Hung KF, Liu YT, Tsai YC. Clinical experience of free forearm flap in head and neck surgery. Changgeng Yi Xue Za Zhi 1990; 13:24-30. [PMID: 2379102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The radial forearm flap can be safely used in intraoral reconstruction. From 1988 to 1989 ten patients received this kind of operation without a flap loss. The radial forearm flap has the advantage of easy dissection without adding too much operation time and cost to the patient. The thin flap is ideal for the intraoral reconstruction and minimizes the need for bulky myocutaneous flaps which are commonly used now.
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Affiliation(s)
- K F Hung
- Department of Plastic Surgery, Chang Gung Memorial Hospital, Taipei, Taiwan, R.O.C
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