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third molars

József Szalma, Edina Lempel
Coronectomy of lower impacted wisdom teeth is the partial removal of third molars, aiming to avoid inferior alveolar nerve injuries. The coronectomy procedure has several crucial points, such as the pulpal, periapical preoperative conditions of the tooth, the way of crown sectioning and decoronation, the wound closure and the length of patients' follow up. In addition it is important to identify and manage possible intraoperative or postoperative complications correctly. According to the literature, the complication rate of coronectomy is usually lower, than that of total teeth removal, furthermore considering inferior alveolar nerve injuries, coronectomy is significantly the safer procedure...
November 2017: Orvosi Hetilap
Farrokh Farhadi, Hosein Eslami, Alireza Majidi, Vahid Fakhrzadeh, Milad Ghanizadeh, Sahar KhademNeghad
Background and Aim: Wisdom teeth remains impacted in the jaw due to several reasons and surgery of impacted wisdom teeth is one of the most common surgeries in dental clinics. Pain, swelling and trismus are the common complications after this surgery which affect quality of life. In articles, various methods are introduced to control immediate inflammatory-response associated with third-molar surgery. The aim of this study is to evaluate the adjunctive effect of low-level laser Therapy on pain, swelling and trismus after surgical removal of impacted lower third molar...
September 30, 2017: Laser Therapy
Hiroya Tanaka, Hideo Iizuka, Yuriy V Pershin, Massimiliano Di Ventra
Ionic Coulomb blockade in nanopores is a phenomenon that shares some similarities but also differences with its electronic ounterpart. Here, we investigate extensively this phenomenon using all-atom molecular dynamics of ionic transport through nanopores of about one nanometer in diameter and up to several nanometers in length. Our goal is to better understand the role of atomic roughness and structure of the pore walls in facilitating ionic Coulomb blockade. Our numerical results reveal the following general trends...
November 13, 2017: Nanotechnology
Ana P Ayres, Jean J Bonvent, Borys Mogilevych, Luis E S Soares, Airton A Martin, Glaucia M Ambrosano, Fábio D Nascimento, Bart Van Meerbeek, Marcelo Giannini
This study investigated the effect of application of non-thermal atmospheric plasma (NTAP) on the topography and composition of the dentin surface, as well as the microtensile bond strength (μTBS) of a universal adhesive to NTAP-treated dentin. Exposed flat dentin surfaces from human third molars were either treated with NTAP for 10 and 30 s or untreated (control). The dentin-surface topography and chemical composition were characterized by atomic force microscopy (n = 3) and Raman confocal spectroscopy (n = 5), respectively...
November 11, 2017: European Journal of Oral Sciences
Romina Brignardello-Petersen
No abstract text is available yet for this article.
November 3, 2017: Journal of the American Dental Association
Tze-Ta Huang, Chen-Jung Chang, Ken-Chung Chen, Jen-Bang Lo, Meng-Yen Chen, Jehn-Shyun Huang
PURPOSE: We propose a 2-stage orthodontic lower third molar extraction procedure to reduce iatrogenic inferior alveolar nerve injury. We tested our hypothesis that there are factors that can predict both dislodgement of the root portion and limited traction distances. PATIENTS AND METHODS: Fifteen patients (mean age, 25.7 years; age range, 17 to 65 years) with 20 lower third molars were enrolled. Panoramic films and cone beam computed tomography were analyzed...
October 16, 2017: Journal of Oral and Maxillofacial Surgery
Yu-Cheng Guo, Guang Chu, Andreas Olze, Sven Schmidt, Ronald Schulz, Christian Ottow, Heidi Pfeiffer, Teng Chen, Andreas Schmeling
The purpose of the present study was to explore the potential application of radiographic visibility of the root pulp in lower third molars in a northern Chinese population, in order to determine if this methodology can be used to prove whether a person has surpassed the thresholds of 18 and 21 years of age. A total of 1300 orthopantomograms comprising equal numbers of females and males evenly distributed between the ages of 15 and 40 years were analyzed. The radiographic visibility of the root pulp of the lower third molars was assessed using the stages described by Olze et al...
November 9, 2017: International Journal of Legal Medicine
Juan F Yepes, Elizabeth Powers, Tim Downey, George J Eckert, Qing Tang, LaQuia Vinson, Gerardo Maupomé
PURPOSE: To (1) determine adherence to guidelines when prescribing panoramic radiographs (PR) for patients 18 y.o. and younger; and 2) compare PR prescriptions between general dentists (GPs) and pediatric dentists (PDs). METHODS: A retrospective analysis of insurance claims included codes for PRs and associated codes for two cities between 2008 and 2015. Chi-square tests ascertained the likelihood of a PR being associated within three days of routine exams. RESULTS: A total of 81,699 pediatric patients were seen by 2,077 GPs and 103 PDs...
July 15, 2017: Pediatric Dentistry
Penporn Luangchana, Suchaya Pornprasertsuk-Damrongsri, Jira Kitisubkanchana, Chanchai Wongchuensoontorn
OBJECTIVE: To determine the prevalence of the retromolar canal and its various patterns using cone beam computed tomography (CBCT). METHOD AND MATERIALS: CBCT images with the presence of mandibular third molars from August 2013 to May 2015 were retrospectively investigated. The presence of retromolar canal, its patterns, sides, as well as gender were evaluated by two observers. The pattern of retromolar canal was initially classified into three types: Type A, superior type; Type B, radicular-retromolar type; and Type C, dental type...
November 7, 2017: Quintessence International
Yasmin Sb de Lima Gomes, Larissa D Alexandrino, Cristiane de M Alencar, Eliane B Alves, Kelson Cf Faial, Cecy M Silva
AIM: Evaluate in situ the effect of nanohydroxyapatite paste (nano-HAP) before bleaching with hydrogen peroxide 35% (HP35%) by ion chromatography (IC) Knoop hardness number (KHN) and tristimulus colorimetry (TC). MATERIALS AND METHODS: A total of 60 fragments were obtained from third molars included (3 mm × 3 mm × 3 mm) and the specimens were divided into three groups (n = 20): Gas chromatography (CG) (negative control group) = no bleaching; HP35% (positive control group) = HP35% whitening (whiteness HP35%); nano-HAP = application for 10 minutes before bleaching treatment + HP35%...
November 1, 2017: Journal of Contemporary Dental Practice
Pradeep Raghav, Kanika Singh, C Munish Reddy, Divya Joshi, Shalu Jain
In orthodontic practice, impaction of maxillary permanent canines is a frequently encountered clinical problem. After the third molar, the canine is the most frequently impacted tooth. For functional occlusion, bringing the impacted canine into occlusion is important to achieve final esthetic in orthodontic practice. This article illustrates a distinct case in which the three permanent canines maintained their unerupted status till the age of 18 years. The three impacted canines were surgically exposed, attachment bonded, traction given with ballista spring for vertical and labial movement, and ideally positioned with fixed orthodontic mechanotherapy...
July 2017: International Journal of Clinical Pediatric Dentistry
Nelamakanahalli K Suma, Kukkalli K Shashibhushan, V V Subba Reddy
Objective: Cavity preparation is a surgical procedure that attempts to remove all infected dentin.(1) Bacteria left beneath the filling material is greatest threat to the pulp. To reduce the potential for residual caries development and sensitivity, an antibacterial solution with the ability to disinfect the prepared tooth surface would be of help.(2) So this study was conducted to evaluate and compare the effect of dentin disinfection with 2% chlorhexidine gluconate (Consepsis) and 0...
July 2017: International Journal of Clinical Pediatric Dentistry
Mário Rodrigues de Melo Filho, Sabina Pena Borges Pêgo, Claudio Marcelo Cardoso, Breno Amaral Rocha, Hercílio Martelli-Júnior, Isadora Luana Flores, Luis Antônio Nogueira Dos Santos, Livia Máris Ribeiro Paranaiba
An ameloblastic fibro-odontoma (AFO) is a rare mixed odontogenic tumor with histologic features of an ameloblastic fibroma in conjunction with the presence of dentin and enamel. It usually appears as a well-circumscribed radiolucency with radiopaque foci and slow growth and is commonly seen in children and young adults. A 13-year-old boy presented with an asymptomatic swelling in the posterior right region of the mandible and the right ascending ramus. The clinical, imaging, and histopathologic findings confirmed the diagnosis of an AFO...
November 2017: General Dentistry
Zhou-Xi Ye, Chi Yang
Extracting horizontal mandibular 3rd molars face considerable difficulty due to the large bone and adjacent tooth resistances. This study aims at evaluating the effectiveness of a novel method-mesiolingual root rotation to extract wisdom teeth of this type. In this study, 73 horizontal teeth extracted using piezosurgery were reviewed and classified based on impaction depth: position I, II, III refers to the highest portion of the crown on a level with upper 1/3, middle 1/3, lower 1/3 of the 2rd molar's root...
October 31, 2017: Scientific Reports
Hayaki Nakatani, Atsushi Mine, Mariko Matsumoto, Tomoshige Kabetani, Asuka Kawaguchi-Uemura, Mami Higashi, Yuko Tajiri, Dai Imai, Ryosuke Hagino, Takuya Minamino, Jiro Miura, Hirofumi Yatani
This study aimed to evaluate the effect of sulfinic acid sodium salt interposition after acid and sodium hypochlorite treatment (NC treatment) on dentin bonding durability using a mild type one-step self-etching adhesive. Fifteen human third molars were randomly assigned into three experimental groups according to dentin pretreatment before applying the one-step self-etching adhesive: Cont group, without pretreatment; NC group, pretreatment with phosphoric acid and sodium hypochlorite gel; and NC+AC group, additional treatment with sulfinic acid sodium salt followed by the same pretreatment of the NC group...
October 27, 2017: Dental Materials Journal
C Neboda, R P Anthonappa, N M King
AIM: This study sought to evaluate the tooth mineral density (TMD) for the different lesion types in hypomineralised first permanent molars (FPMs) and compare them to unaffected enamel in clinically sound FPMs. DESIGN: Eighteen FPMs with varying degrees of hypomineralised enamel were grouped into brown, yellow/creamy and white lesion types. Micro-CT was used to determine the TMD for each lesion type, and for unaffected enamel at different locations in the outer, middle, and inner-third of the enamel...
October 28, 2017: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
Yong Hur, Yumi Ogata
No abstract text is available yet for this article.
November 2017: Journal of the American Dental Association
Yi Huang, Yinqiu Yan, Jing Cao, Bingjie Xie, Xueling Xiao, Mengqi Luo, Ding Bai, Xianglong Han
OBJECTIVE: This study was designed to examine the relationship between third molar agenesis and skeletal morphology in the Chinese population. MATERIALS AND METHODS: A total of 1043 patients' records were analyzed with panoramic radiographs and cephalograms. Congenitally missing third molars were assessed with respect to gender, jaw, and side, and assessed in various types of facial morphology. Linear, angular, and proportional cephalometric measurements were analyzed and compared among the samples...
November 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
Liqun Gu, Chao Zhu, Kejia Chen, Xianchu Liu, Zhangui Tang
PURPOSE: The positional relationship between the mandibular canal and corresponding third molars is a key anatomic factor of inferior alveolar nerve (IAN) injury. The aim of the present study is to classify the anatomic three-dimensional relationship between the mandibular third molar and the mandibular canal on cone-beam computed tomography (CBCT) images. METHODS: This study used CBCT images to classify the positional relationship between the mandibular canal and corresponding third molars...
October 27, 2017: Surgical and Radiologic Anatomy: SRA
Rafael Gómez de Diego, Javier Montero, Nansi López-Valverde, José Ignacio de Nieves, Juan-Carlos Prados-Frutos, Antonio López-Valverde
BACKGROUND: The aim of this study was to determine the association between facial pattern according to Ricketts cephalometric analysis, and prevalence of third molar agenesis, taking subject age and gender as control variables. MATERIAL AND METHODS: An epidemiological survey was conducted based on a sample of 224 candidates for orthodontic treatment aged 12 to 24 (n=224). Third molar agenesis was recorded using Ricketts cephalometric analyses of lateral teleradiographs and panoramic radiographs...
September 2017: Journal of Clinical and Experimental Dentistry
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