The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Prince Kumar - One of the best experts on this subject based on the ideXlab platform.
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three dimensional analysis to compare parallelism of occlusal planes to the hamular notch Incisive Papilla plane in dentulous and edentulous subjects
European Journal of General Dentistry, 2013Co-Authors: Kishan Singh, N Lakshmi, Yoshaskam Agnihotri, Suraj Suvarna, Sukant Sahoo, Prince KumarAbstract:Purpose and Aim: The aim of this study was to evaluate the reliability of hamular notch-Incisive Papilla (HIP) plane as an anatomical landmark in establishing occlusal plane in edentulous subjects. Materials and Methods: Seventy subjects were selected from the South Indian population, of which 50 were dentulous and 20 were edentulous. Dental stone casts were fabricated for dentulous and edentulous subjects. Dental stone casts of the dentulous and edentulous subjects, along with occlusal rims were analyzed using the three-dimensional analyzing machines. The angles between the occlusal planes and HIP plane were determined using the reference coordinate system based on characteristic points in the dentition on the cusp tips in dentulous casts and on maxillary occlusal rim on edentulous casts. Results: The HIP plane tends to be parallel to the occlusal plane. There is no statistical difference between sexes. Conclusion: The HIP plane is parallel to the natural occlusal plane and can be used as a reference plane to re-establish the occlusal plane in edentulous patients.
Hiroyuki Ichikawa - One of the best experts on this subject based on the ideXlab platform.
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innervation of the human Incisive Papilla comparison with other oral regions
Cells Tissues Organs, 2018Co-Authors: Chiaki Endo, Tadasu Sato, Takehiro Yajima, Kaoru Igarashi, Hiroyuki IchikawaAbstract:: Immunohistochemistry for several neurochemical substances was performed on the human Incisive Papilla and other oral structures. Sodium channel alpha subunit 7 (SCN7A) protein-immunoreactive (IR) Schwann cells and protein gene product 9.5 (PGP 9.5)-IR nerve fibers made nerve plexuses beneath the epithelium of the palate, including the Incisive Papilla, tongue, and lip. SCN7A immunoreactivity could also be detected in lamellated and nonlamellated capsules of corpuscle endings. Lamellated SCN7A-IR corpuscle endings were mostly restricted to the mucous and cutaneous lips. These endings had thick and spiral-shaped PGP 9.5-IR axons without ramification. Nonlamellated SCN7A-IR corpuscle endings were most numerous in the Incisive Papilla among the oral regions. On the basis of axonal morphology, the nonlamellated endings were divided into simple and complex types. PGP 9.5-IR terminal axons in the simple type ran straight or meandered with slight ramification, whereas those in the complex type were densely entangled with abundant ramification. Substance P (SP)-, calcitonin gene-related peptide (CGRP)-, and transient receptor potential cation channel subfamily V member 2 (TRPV2)-IR varicose fibers were rarely seen beneath the epithelium of oral structures. The present study indicates that the human Incisive Papilla has many low-threshold mechanoreceptors with nonlamellated capsules. SP-, CGRP-, and TRPV2-containing nociceptors may be infrequent in the Incisive Papilla and other oral regions.
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Distribution of transient receptor potential melastatin-8-containing nerve fibers in rat oral and craniofacial structures
Annals of Anatomy-anatomischer Anzeiger, 2015Co-Authors: Takehiro Yajima, Tadasu Sato, Hiroshi Hosokawa, Teruyoshi Kondo, Masahiro Saito, Hidetoshi Shimauchi, Hiroyuki IchikawaAbstract:Abstract The transient receptor potential melastatin-8 (TRPM8) is a cold and menthol receptor located in the sensory ganglia. Immunohistochemistry for TRPM8 was performed on oral and craniofacial structures of the rat. TRPM8-immunoreactive (-IR) nerve fibers were detected in the oral mucous membrane. In the gingiva, TRPM8-IR nerve fibers were abundant beneath and within crestal and outer epithelia. Such nerve fibers were also common beneath and within taste buds in the Incisive Papilla. In addition, TRPM8-immunoreactivity was expressed by some taste bud cells in the Papilla. Lips, periodontal ligaments and salivary glands as well as masticatory muscles and temporomandibular joints were mostly devoid of TRPM8-IR nerve fibers. A double immunofluorescence study indicated different distribution patterns of nerve fibers containing TRPM8 and calcitonin gene-related peptide in oral and craniofacial tissues. Retrograde tracing method also indicated that TRPM8-IR nerve fibers in the gingiva and Incisive Papilla originate from small sensory neurons in the trigeminal ganglion. TRPM8 may be associated with cool, cold nociceptive (
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Parvalbumin- and calbindin D-28k-immunoreactive innervation of orofacial tissues in the rat
Experimental Neurology, 1997Co-Authors: Hiroyuki Ichikawa, Tomosada SugimotoAbstract:Abstract Parvalbumin- and calbindin D-28k-immunoreactive (-ir) innervation was examined in orofacial tissues of the rat. Labial and facial skins were devoid of the calcium-binding protein (CaBP)-ir nerve endings, while the infraorbital and mental nerves contained numerous parvalbumin-ir axons. Labial and gingival mucosae were also devoid of the CaBP-ir nerve endings. The buccal mucosa and Incisive Papilla contained both encapsulated and unencapsulated endings, while the hard palate mucosa excluding the Incisive Papilla contained only unencapsulated endings. Encapsulated endings were found just beneath the epithelium or attached to the cartilaginous core of the Incisive Papilla. Unencapsulated endings in the lamina propria were subdivided into two types: simple (unramified) and complex (ramified). Neurites of simple endings were straight, curved, or coiled, while those of complex endings exhibited a bush-like appearance due to the ramification. In addition, palatal rugae contained intraepithelial endings. The unencapsulated complex endings in palatal rugae coexpressed parvalbumin- and calbindin D-28k-irs, whereas other endings were immunoreactive for parvalbumin alone. The pterygopalatine ganglion contained calbindin D-28k-ir pericellular fibers but not the ir cell bodies. A subpopulation of trigeminal ganglion neurons coexpressed both CaBPs. CaBP-ir encapsulated and unencapsulated endings in the oral mucosa probably include low-threshold mechanoreceptors, while parvalbumin-ir intraepithelial endings in the palatal mucosa may be involved in nociception.
Kishan Singh - One of the best experts on this subject based on the ideXlab platform.
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three dimensional analysis to compare parallelism of occlusal planes to the hamular notch Incisive Papilla plane in dentulous and edentulous subjects
European Journal of General Dentistry, 2013Co-Authors: Kishan Singh, N Lakshmi, Yoshaskam Agnihotri, Suraj Suvarna, Sukant Sahoo, Prince KumarAbstract:Purpose and Aim: The aim of this study was to evaluate the reliability of hamular notch-Incisive Papilla (HIP) plane as an anatomical landmark in establishing occlusal plane in edentulous subjects. Materials and Methods: Seventy subjects were selected from the South Indian population, of which 50 were dentulous and 20 were edentulous. Dental stone casts were fabricated for dentulous and edentulous subjects. Dental stone casts of the dentulous and edentulous subjects, along with occlusal rims were analyzed using the three-dimensional analyzing machines. The angles between the occlusal planes and HIP plane were determined using the reference coordinate system based on characteristic points in the dentition on the cusp tips in dentulous casts and on maxillary occlusal rim on edentulous casts. Results: The HIP plane tends to be parallel to the occlusal plane. There is no statistical difference between sexes. Conclusion: The HIP plane is parallel to the natural occlusal plane and can be used as a reference plane to re-establish the occlusal plane in edentulous patients.
Jenchyan Wang - One of the best experts on this subject based on the ideXlab platform.
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three dimensional relationship of the maxillary anterior teeth to the Incisive Papilla in young adults
Kaohsiung Journal of Medical Sciences, 2007Co-Authors: Posung Fu, Chuncheng Hung, Jauming Hong, Jenchyan Wang, C C Tsai, Yimin WuAbstract:The use of the Incisive Papilla as an important guide for setting maxillary teeth has been applied in prosthetic dentistry. The purpose of this study was to estimate the relationship between maxillary anterior teeth and the Incisive Papilla of young adults with approximately optimal occlusion in Taiwan. Study casts of 100 young adults (50 males, 50 females; mean age, 22.4 years) were selected in this study. All of the marked points on maxillary casts were measured using a three-dimensional precise measuring device. The relative positions of maxillary teeth landmarks to Incisive Papilla were measured and analyzed using SAS software (JMP 4.02). Student's t test and Pearson's correlation test were used to test the statistical significance of any differences ( p p > 0.05). The intercanine line was 0.27 ± 1.30 mm posterior to the center of Incisive Papilla. There was no significant difference in gender ( p > 0.05). The horizontal distances of the mesiolabial incisal edge of the upper central incisor and the intercanine line to the center of the Incisive Papilla showed only weak correlation ( r
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three dimensional analysis of the occlusal plane related to the hamular Incisive Papilla occlusal plane in young adults
Journal of Oral Rehabilitation, 2007Co-Authors: Posung Fu, Chuncheng Hung, J M Hong, Jenchyan WangAbstract:: The planes which serve as references for cranium and face in dental clinical application included the occlusal plane, Frankfort plane, Camper's plane and hamular-Incisive-Papilla (HIP) plane. The HIP occlusal plane is a horizontal plane passing through the bilateral hamular notches and the Incisive Papilla (Dent Surv. 1975;51:60). The aim of this study was to estimate the relationship between the various occlusal planes and the HIP plane in Taiwanese young adults with approximately optimal occlusion. Study casts of 100 young adults (50 men and 50 women) were selected in this study. All market points on the maxillary casts were measured by a three-dimensional precise measuring device. The angular relationship between the four various occlusal planes and the HIP plane were investigated. The vertical distances between the cusp tips and incisal edges of maxillary teeth to the HIP plane were measured. Data were performed by the Statistic analysis software programme (JMP 4.02). The Student's t-test and Pearson's correlation test were used to test the statistical significance (P < 0.05). The results showed that the occlusal plane defined as the incisal edge of maxillary central incisor to mesiobuccal cusp tips of maxillary second molars had the smallest included angle with the HIP plane (2.61 +/- 0.81 degrees). The incisal edge of maxillary right central incisal to mesiopalatal cusp tips of maxillary first molars had the largest included angle with the HIP plane (7.72 +/- 1.60 degrees). The curve is drawn through the buccal cusp tips of maxillary teeth had better parallelism with the HIP plane.
Sebnem U Buyukkaplan - One of the best experts on this subject based on the ideXlab platform.
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investigation of vertical distance between Incisive Papilla and incisal edge of maxillary central incisors
European Journal of Dentistry, 2008Co-Authors: Ustun M Guldag, Fatih Sentut, Sebnem U BuyukkaplanAbstract:Objectives The aim of the present study was to determine the vertical distance between maxillary central incisors and Incisive Papilla.
