The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform
Francilin F - One of the best experts on this subject based on the ideXlab platform.
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Correlation between Natural Tooth Shade and Scleral Shade using Vita Toothguide 3D-Master Shade Guide and Digital Photography
2020Co-Authors: Francilin FAbstract:INTRODUCTION: Prosthodontists have always been faced with the challenge of harmonizing tooth shade with facial appearance in patients undergoing full mouth restorations. The knowledge of human tooth shade and its distribution are very important to the understanding of shade matching in aesthetic dentistry. In prosthetic applications, shade selection of an artificial teeth is based mainly on visual comparison of the remaining teeth. Attempt has been made to find out the association of tooth shade with colour of skin, hairs, iris etc. with the aid of commercially available shade matching systems to improve the quality of shade matching. Traditionally, shade selection has been performed visually with the aid of a shade guide. The ability to perceive color differences varies from person to person, and experience in shade matching may also be of importance. Digital imaging has potential use in dental shade determination. Various shade matching software’s are also available to analyze the digital images to aid in shade matching. AIM OF THE STUDY: The aim of the study is to find the correlation between natural tooth shade and scleral shade using vita tooth guide 3d-master shade guide and digital photography MATERIALS AND METHODS: 100 subjects, were selected based on the predetermined inclusion and exclusion criteria, randomly chosen. They are subjected to thorough history and clinical examination as per the structured case proforma sheet designed for the study. Patients tooth shade will be assessed using vita 3d-master shade guide and photography will be taken. Then patients scleral shade will be assessed using vita 3d master shade guide and photographs will be taken using DSLR camera and the digital images obtained are analyzed using photoshop software and L, a, b values are obtained. RESULTS: In this study it is found that there is moderately strong correlation between the value of tooth shade and scleral shade obtained. The correlation strength of chroma of tooth shade and scleral shade is weak. The hue of tooth shade and scleral shade is strongly correlating. The hue, chroma, value of tooth and scleral shade was assessed by visual shade matching method using vita3d master shade guide. Digital images acquired in digital photography was assessed using photoshop software and L, a, b values are calculated. The correlation strength of lightness (L) value of tooth and sclera is very strong and the a, b values were found to be moderately strong. CONCLUSION: On the basis of results obtained it is concluded that there is a correlation between the tooth shade and scleral shade of the study population. The hue, value of tooth shade and scleral shade showed a strong correlation whereas they differed in the intensity. The chroma (intensity) of scleral shade was lesser when compared to tooth shade. This may be due to the presence of conjunctiva, subconjunctival space and Tenons Capsule outside the sclera. The values of CIELAB obtained by digital photography ha shown a strong association between the tooth and scleral shade. Hence, scleral shade can be used as a guide in tooth shade selection in completely edentulous patients and vice versa
Northwestern University - One of the best experts on this subject based on the ideXlab platform.
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Walsh & Hoyt: Orbital Inflammatory Syndrome
Spencer S. Eccles Health Sciences Library University of Utah, 2005Co-Authors: Nicholas J Volpe, Northwestern UniversityAbstract:Inflammatory conditions involving the orbit, including abscesses and the nonspecific condition called idiopathic inflammatory pseudotumor or idiopathic orbital inflammatory syndrome, may also cause anterior compression of the proximal optic nerve and secondary disc swelling that can be confused with primary optic nerve tumors. Associated posterior scleritis may also cause disc swelling. Affected patients usually experience acute or subacute visual loss, pain, proptosis, and congestion associated with the optic disc swelling, possibly with retinal vein occlusion. The presence of an orbital process is rarely in question. Infrequently, meningiomas of the orbital apex produce a similar clinical picture. CT scanning and MR scanning usually show thickening and enhancement of normal tissues or a mass lesion. Ultrasound can be very helpful in the identification of posterior scleritis and thickening of Tenons Capsule and the sclera. The pain and rapid evolution of symptoms generally distinguish orbital inflammatory disease from the more indolent course characteristic of most orbital tumors. Most of these patients respond rapidly to systemic steroid treatment
Nicholas J Volpe - One of the best experts on this subject based on the ideXlab platform.
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Walsh & Hoyt: Orbital Inflammatory Syndrome
Spencer S. Eccles Health Sciences Library University of Utah, 2005Co-Authors: Nicholas J Volpe, Northwestern UniversityAbstract:Inflammatory conditions involving the orbit, including abscesses and the nonspecific condition called idiopathic inflammatory pseudotumor or idiopathic orbital inflammatory syndrome, may also cause anterior compression of the proximal optic nerve and secondary disc swelling that can be confused with primary optic nerve tumors. Associated posterior scleritis may also cause disc swelling. Affected patients usually experience acute or subacute visual loss, pain, proptosis, and congestion associated with the optic disc swelling, possibly with retinal vein occlusion. The presence of an orbital process is rarely in question. Infrequently, meningiomas of the orbital apex produce a similar clinical picture. CT scanning and MR scanning usually show thickening and enhancement of normal tissues or a mass lesion. Ultrasound can be very helpful in the identification of posterior scleritis and thickening of Tenons Capsule and the sclera. The pain and rapid evolution of symptoms generally distinguish orbital inflammatory disease from the more indolent course characteristic of most orbital tumors. Most of these patients respond rapidly to systemic steroid treatment
Qian-yan Kang - One of the best experts on this subject based on the ideXlab platform.
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Clinical observation of double incision combined surgery of single-stab trabeculectomy and phacoemulsification
Press of International Journal of Ophthalmology (IJO PRESS), 2014Co-Authors: Si-wei Liu, Qun Wang, Qian-yan KangAbstract:AIM:To observe the effects of double incision combined surgery of single-stab trabeculectomy and phacoemulsification.METHODS: Totally 28 cases(30 eyes)with glaucoma and cataract undertook the modified combined surgery of single-stab trabeculectomy and phacoemulsification. After traditional phacoemulsification, cut the bulbar conjunctiva and Tenons Capsule from the 11 o'clock to 1 o'clock, then puncture into the anterior chamber in 2mm behind the corneal limbus with 3mm tunnel knife, shaping a 3mm wide, 1/3-1/4 thickness scleral tunnel. Getting into the trabecular tunnel, bite off 3 pieces of trabecular tissue about 1mm×1mm size. The changes in the imtraocular pressure(IOP)and the visual acuity before and after the surgery as well as filtering bleb(OCT confirmed)and complications were carefully observed in 3-6mo postoperatively.RESULTS: The postoperative visual acuity in 1wk postoperatively less than 0.1 was found in 3 eyes, from 0.1 to 0.3 was found in 6 eyes,from 0.3 to 0.6 in 13 eyes,from 0.6 to 0.8 in 8 eyes.One eye had malignant glaucoma, and 8 eyes had cornea edema and slightly fibrin exudation in the pupil area; In all cases maintained function conjunctival blebs of filtering, OCT confirmed this.IOP remained normal in 28 eyes in 3-6mo follow up, IOP of 2 other eyes could be controlled by anti-glaucoma eye drops.CONCLUSION:Double incision combined surgery of single-stab trabeculectomy and phacoemulsification is effective and safe,reduces the postoperative complications and is worthy of promotion
Si-wei Liu - One of the best experts on this subject based on the ideXlab platform.
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Clinical observation of double incision combined surgery of single-stab trabeculectomy and phacoemulsification
Press of International Journal of Ophthalmology (IJO PRESS), 2014Co-Authors: Si-wei Liu, Qun Wang, Qian-yan KangAbstract:AIM:To observe the effects of double incision combined surgery of single-stab trabeculectomy and phacoemulsification.METHODS: Totally 28 cases(30 eyes)with glaucoma and cataract undertook the modified combined surgery of single-stab trabeculectomy and phacoemulsification. After traditional phacoemulsification, cut the bulbar conjunctiva and Tenons Capsule from the 11 o'clock to 1 o'clock, then puncture into the anterior chamber in 2mm behind the corneal limbus with 3mm tunnel knife, shaping a 3mm wide, 1/3-1/4 thickness scleral tunnel. Getting into the trabecular tunnel, bite off 3 pieces of trabecular tissue about 1mm×1mm size. The changes in the imtraocular pressure(IOP)and the visual acuity before and after the surgery as well as filtering bleb(OCT confirmed)and complications were carefully observed in 3-6mo postoperatively.RESULTS: The postoperative visual acuity in 1wk postoperatively less than 0.1 was found in 3 eyes, from 0.1 to 0.3 was found in 6 eyes,from 0.3 to 0.6 in 13 eyes,from 0.6 to 0.8 in 8 eyes.One eye had malignant glaucoma, and 8 eyes had cornea edema and slightly fibrin exudation in the pupil area; In all cases maintained function conjunctival blebs of filtering, OCT confirmed this.IOP remained normal in 28 eyes in 3-6mo follow up, IOP of 2 other eyes could be controlled by anti-glaucoma eye drops.CONCLUSION:Double incision combined surgery of single-stab trabeculectomy and phacoemulsification is effective and safe,reduces the postoperative complications and is worthy of promotion
