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https://www.readbyqxmd.com/read/27883188/structural-organization-and-tooth-development-in-a-homo-aff-erectus-juvenile-mandible-from-the-early-pleistocene-site-of-garba-iv-at-melka-kunture-ethiopian-highlands
#1
Clément Zanolli, M Christopher Dean, Yared Assefa, Priscilla Bayle, José Braga, Silvana Condemi, Metasebia Endalamaw, Blade Engda Redae, Roberto Macchiarelli
OBJECTIVES: The immature partial mandible GAR IVE from the c. 1.7 Ma old Garba IV site at Melka Kunture (Upper Awash Basin, Ethiopia), the earliest human representative from a mountain-like environment, represents one of the oldest early Homo specimens bearing a mixed dentition. Following its first description (Condemi, ), we extended the analytical and comparative record of this specimen by providing unreported details about its inner morphology, tooth maturational pattern and age at death, crown size, and tooth tissue proportions...
November 24, 2016: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/27882250/apical-revascularization-after-delayed-tooth-replantation-an-unusual-case
#2
Marília Pacífico Lucisano, Paulo Nelson-Filho, Lea Assed Bezerra Silva, Raquel Assed Bezerra Silva, Fabricio Kitazono de Carvalho, Alexandra Mussolino de Queiroz
The aim of this paper is to present the clinical and radiological outcome of the treatment involving a delayed tooth replantation after an avulsed immature permanent incisor, with a follow-up of 1 year and 6 months. An 8-year-old boy was referred after dental trauma that occurred on the previous day. The permanent maxillary right central incisor (tooth 11) had been avulsed. The tooth was hand-held during endodontic therapy and an intracanal medication application with calcium hydroxide-based paste was performed...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27805884/root-canal-filling-after-revascularization-revitalization
#3
Hugo Plascencia, Álvaro Cruz, Mariana Díaz, Ana Laura Jiménez, Rodrigo Solís, Cesar Bernal
INTRODUCTION: Revascularization/revitalization therapy is considered an alternative procedure for management of teeth with an immature apex and necrotic pulp, mainly when root development is interrupted in the early phases of formation. However, this clinical treatment protocol should be considered a permanent procedure? METHOD: A maxillary central incisor with a previous and successful RR treatment was intentionally filled with a biocompatible material with the periapical tissues due to the patient's lack of adherence to the follow-up protocol...
2016: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/27797725/morphology-and-distribution-of-taste-papillae-and-oral-denticles-in-the-developing-oropharyngeal-cavity-of-the-bamboo-shark-chiloscyllium-punctatum
#4
Carla J L Atkinson, Kyle J Martin, Gareth J Fraser, Shaun P Collin
Gustation in sharks is not well understood, especially within species that ingest food items using suction. This study examines the morphological and immunohistochemical characterisation of taste papillae and oral denticles in the oropharynx of the brown-banded bamboo shark Chiloscyllium punctatum and compares their distribution during development. Taste papillae of the brown-banded bamboo shark Chiloscyllium punctatum are located throughout the oropharyngeal region and are most concentrated on the oral valves (2,125-3,483 per cm(2) in embryos; 89-111 per cm(2) in mature adults) close to the tooth territories...
October 26, 2016: Biology Open
https://www.readbyqxmd.com/read/27790270/vital-pulp-therapy-of-a-symptomatic-immature-permanent-molar-with-long-term-success
#5
Sedigheh Sabbagh, Alireza Sarraf Shirazi, Mohammad Jafar Eghbal
Vital pulp therapy (VPT) is the preferred conservative treatment for preservation of symptomatic pulps in immature permanent teeth. The present case report summarizes VPT of an immature permanent molar with irreversible pulpitis associated with apical periodontitis in a 9-year-old boy. Cervical pulpotomy was performed and radicular pulp stumps were covered with calcium-enriched mixture (CEM) cement; the tooth was then restored with stainless steel crown. After a 50-month follow-up period, the pulpotomized molar was clinically functional and asymptomatic...
2016: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/27790081/regenerative-dentistry-animal-model-for-regenerative-endodontology
#6
Nisarat Ruangsawasdi, Matthias Zehnder, Raphael Patcas, Chafik Ghayor, Franz E Weber
BACKGROUND: Ectopic tissue has been observed frequently in human root canal specimens when cell homing studies were performed at the dorsum of rodents. In contrast, pulp-like tissue formed when immature teeth were implanted on top of the rat calvaria. It was surmised, yet not tested, that the implantation site might affect tissue ingrowth. METHODS: Four root sections from human immature molars cleaned with 5% sodium hypochlorite (NaOCl) followed by 17% ethylenediaminetetraacetic acid (EDTA) were implanted per rat (n = 5)...
September 2016: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/27776880/guided-autotransplantation-of-teeth-a-novel-method-using-virtually-planned-3-dimensional-templates
#7
Georg D Strbac, Albrecht Schnappauf, Katharina Giannis, Michael H Bertl, Andreas Moritz, Christian Ulm
INTRODUCTION: The aim of this study was to introduce an innovative method for autotransplantation of teeth using 3-dimensional (3D) surgical templates for guided osteotomy preparation and donor tooth placement. METHODS: This report describes autotransplantation of immature premolars as treatment of an 11-year-old boy having suffered severe trauma with avulsion of permanent maxillary incisors. This approach uses modified methods from guided implant surgery by superimposition of Digital Imaging and Communications in Medicine files and 3D data sets of the jaws in order to predesign 3D printed templates with the aid of a fully digital workflow...
October 21, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27762658/effects-of-stem-cell-factor-on-cell-homing-during-functional-pulp-regeneration-in-human-immature-teeth
#8
Nisarat Ruangsawasdi, Matthias Zehnder, Raphael Patcas, Chafik Ghayor, Barbara Siegenthaler, Bebeka Gjoksi, Franz E Weber
Conventional root canal treatment in immature permanent teeth can lead to early tooth loss in children because root formation is discontinued. We investigated whether the stem cell factor (SCF) could facilitate cell homing in the pulpless immature root canal and promote regeneration of a functional pulp. In vitro, human mesenchymal stem cells (hMSCs) were exposed to SCF at various concentrations for assessing cell migration, proliferation, and differentiation toward odonto/osteoblasts by 3D-chemotaxis slides, WST-1 assay, and alkaline phosphatase activity, respectively...
November 22, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27701354/a-new-legskate-sinobatis-andamanensis-rajiformes-anacanthobatidae-%C3%A2-from-the-andaman-sea-northeastern-indian-ocean
#9
Peter R Last, Somchai Bussarawit
A new legskate, Sinobatis andamanensis sp. nov. is described from a small collection of specimens taken off Phuket (Thailand) during an exploratory survey of the Andaman Sea. It is the first species of Sinobatis and the only legskate known from the northern Indian Ocean. Sinobatis andamanensis sp. nov. has an especially long and narrowly pointed snout (preorbital length exceeding 23% TL) with an interorbital distance 7-9.5 in snout length (up to 6.7 in other Sinobatis species). Molecular data are unavailable for most members of the genus, but based on morphology it shares with S...
September 14, 2016: Zootaxa
https://www.readbyqxmd.com/read/27617375/regenerative-endodontic-treatment-versus-apical-plug-in-immature-teeth-three-year-follow-up
#10
Saeed Asgary, Mahta Fazlyab, Ali Nosrat
This report compares and evaluates the treatment outcomes of regenerative endodontic treatment and apical plug as two accepted treatment protocols in a pair of necrotic immature maxillary central incisors of a 12-year old female. The patient was referred complaining of a dull pain and swelling in her upper lip area. She had a history of trauma to the anterior maxilla two years earlier. Both teeth were clinically diagnosed with pulp necrosis and periapical radiographs revealed that separate periapical radiolucent lesions surrounded the immature apices of both teeth...
2016: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/27576211/regenerative-endodontic-procedures-for-traumatized-teeth-after-horizontal-root-fracture-avulsion-and-perforating-root-resorption
#11
Tarek Mohamed A Saoud, Sonali Mistry, Bill Kahler, Asgeir Sigurdsson, Louis M Lin
INTRODUCTION: Traumatic injury to the teeth can cause horizontal root fractures and inflammatory root resorptions (external and internal). Traditionally, traumatized teeth with horizontal root fractures resulting in pulp necrosis and inflammatory root resorptions are treated with conventional root canal therapy. METHODS: A 15-year-old boy had a history of traumatic injury to mature tooth #8 resulting in horizontal root fracture and pulp necrosis of the coronal fragment...
October 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27563191/mineral-trioxide-aggregate-apexification-a-novel-approach
#12
Aamir Rashid Purra, Fayaz Ahmed Ahangar, Sachin Chadgal, Riyaz Farooq
The treatment of choice for necrotic teeth with immature root is apexification, which is induction of apical closure to produce more favorable conditions for conventional root canal filling. The most commonly advocated medicament is calcium hydroxide although recently considerable interest has been expressed in the use of mineral trioxide aggregate (MTA). MTA offers the option of a two-visit apexification procedure so that the fragile tooth can be restored immediately. However, difficulty in placing the material in the wide apical area requires the use of an apical matrix...
July 2016: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/27554379/management-of-coronal-discolouration-following-a-regenerative-endodontic-procedure-in-a-maxillary-incisor
#13
Giselle D'Mello, Luke Moloney
Pulpal necrosis and infection in an immature anterior tooth subsequent to traumatic injury is a challenging situation. Regenerative endodontics, resulting in continued development of the tooth, provides a biological response to this clinical challenge. Regenerative endodontic procedures require disinfection of the infected root canal and sealing of the pulp canal space. Mineral trioxide aggregate (MTA) provides a good seal, is biocompatible, and allows the formation of a hard tissue to occur within the root canal...
August 24, 2016: Australian Dental Journal
https://www.readbyqxmd.com/read/27504409/effect-of-calcium-hydroxide-chlorhexidine-digluconate-and-camphorated-monochlorophenol-on-the-sealing-ability-of-biodentine-apical-plug
#14
Aastha Arora Srivastava, Harshit Srivastava, Ashwini B Prasad, Deepak Raisingani, Dileep Soni
INTRODUCTION: Teeth with immature apex are managed by establishing an apical plug using various materials and techniques. However, the use of previously placed intracanal medicament may affect the sealing ability of permanent filling material used as an apical plug. AIM: To evaluate the effect of removal of previously placed Calcium Hydroxide, Chlorhexidine Digluconate and Camphorated Monochlorophenol as an intracanal medicament on the sealing ability of the Biodentine as an apical plug...
June 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27494172/circadian-rhythm-regulates-development-of-enamel-in-mouse-mandibular-first-molar
#15
Jiang Tao, Yue Zhai, Hyun Park, Junli Han, Jianhui Dong, Ming Xie, Ting Gu, Keidren Lewi, Fang Ji, William Jia
Rhythmic incremental growth lines and the presence of melatonin receptors were discovered in tooth enamel, suggesting possible role of circadian rhythm. We therefore hypothesized that circadian rhythm may regulate enamel formation through melatonin receptors. To test this hypothesis, we examined expression of melatonin receptors (MTs) and amelogenin (AMELX), a maker of enamel formation, during tooth germ development in mouse. Using qRT-PCR and immunocytochemistry, we found that mRNA and protein levels of both MTs and AMELX in normal mandibular first molar tooth germs increased gradually after birth, peaked at 3 or 4 day postnatal, and then decreased...
2016: PloS One
https://www.readbyqxmd.com/read/27471541/single-visit-pulp-revascularization-of-a-nonvital-immature-permanent-tooth-using-biodentine
#16
Mohammad Mhd Nader Aldakak, Ismail Davut Capar, Mohammad Salem Rekab, Souad Abboud
UNLABELLED: An 11-year-old female patient was referred with a chief complaint of pain in the right mandibular second premolar. Clinical and radiographic examinations showed secondary caries under an old composite restoration, a negative response to a pulp test and an immature root with an open apex. After root canal cleaning and shaping, bleeding was invoked in the canal up to 2 mm short of the cemento-enamel junction (CEJ). After 10 min to allow clotting at this level, a plug of Biodentine was placed over the blood clot and the tooth was temporized with glass ionomer cement...
2016: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/27454457/high-frequency-pulsed-low-level-diode-laser-therapy-accelerates-wound-healing-of-tooth-extraction-socket-an-in-vivo-study
#17
Masahiro Noda, Akira Aoki, Koji Mizutani, Taichen Lin, Motohiro Komaki, Shunichi Shibata, Yuichi Izumi
BACKGROUND AND OBJECTIVE: This study aimed to evaluate the effects of high-frequency pulsed (HiFP) low-level laser therapy (LLLT) on early wound healing of tooth extraction sockets in rats. STUDY DESIGN/MATERIALS AND METHODS: Bilateral maxillary first molars were extracted from 6-week-old Sprague-Dawley rats. Sockets on the right were treated by HiFP low-level diode laser irradiation (904-910 nm); the left sides served as unirradiated controls. LLLT (0.28 W, 30 kHz, 200-ns pulse, 0...
July 25, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27427186/regenerative-endodontic-therapy-in-a-single-visit-using-platelet-rich-plasma-and-biodentine-in%C3%A2-necrotic-and-asymptomatic-immature-molar%C3%A2-teeth-a-report-of-3-cases
#18
Gamze Topçuoğlu, Hüseyin Sinan Topçuoğlu
This report describes 3 successful single-visit regenerative endodontic therapy cases using platelet-rich plasma (PRP) and Biodentine (Septodont, Saint Maurdes Fossés, France) for 3 immature mandibular molar teeth, all with necrotic pulp, in 2 children aged 8 years and 1 aged 9 years. Three teeth were separately diagnosed as having a necrotic pulp. After preparation of the access cavity under rubber dam isolation, the necrotic pulp was removed, and each canal was irrigated with 2.5% sodium hypochlorite, sterile saline, and 17% EDTA solutions...
September 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27413380/bone-formation-from-porcine-dental-germ-stem-cells-on-surface-modified-polybutylene-succinate-scaffolds
#19
Nergis Abay, Gorke Gurel Pekozer, Mustafa Ramazanoglu, Gamze Torun Kose
Designing and providing a scaffold are very important for the cells in tissue engineering. Polybutylene succinate (PBS) has high potential as a scaffold for bone regeneration due to its capacity in cell proliferation and differentiation. Also, stem cells from 3rd molar tooth germs were favoured in this study due to their developmentally and replicatively immature nature. In this study, porcine dental germ stem cells (pDGSCs) seeded PBS scaffolds were used to investigate the effects of surface modification with fibronectin or laminin on these scaffolds to improve cell attachment, proliferation, and osteogenic differentiation for tissue engineering applications...
2016: Stem Cells International
https://www.readbyqxmd.com/read/27398184/mta-apical-barrier-in-vitro-study-of-the-use-of-ultrasonic-vibration
#20
Begona Escribano-Escrivá, Pedro Micó-Muñoz, Alberto Manzano-Saiz, Teresa Giner-Lluesma, Nicolás Collado-Castellanos, Susana Muwaquet-Rodríguez
BACKGROUND: The apexification is the first alternative treatment on a permanent tooth when, after a tooth trauma and in the presence of immature apex trauma, pulp necrosis occurs. Many studies have demonstrated the efficacy of mineral trioxide aggregate (MTA) as apical sealing material of choice in these cases, but has a degree of filtration as all other materials. The objective of this study was to analyze the seal ability of MTA on the duct walls in immature teeth unirradicular apexes, using indirect vibration...
July 2016: Journal of Clinical and Experimental Dentistry
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