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https://www.readbyqxmd.com/read/28748234/erosive-tooth-wear-among-different-tooth-types-and-surfaces-in-japanese-adults-15-to-89-years-old
#1
Yuichi Kitasako, Yoshiyuk Sasaki, Tomohiro Takagaki, Alireza Sadr, Junji Tagami
PURPOSE: To evaluate the prevalence of erosive tooth wear on buccal, incisal/occlusal and palatal/lingual surfaces in a wide age range of Japanese adults. MATERIALS AND METHODS: The study included a total of 1108 adults aged 15 to 89 years in Tokyo, Japan. The subjects were asked to complete a self-administered nutrition-related questionnaire. Two examiners evaluated tooth wear on the buccal, occlusal/incisal and palatal/lingual surfaces in a full-mouth recording, using a modified Smith and Knight tooth-wear index...
July 25, 2017: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/28748049/effect-of-different-nickel-titanium-rotary-files-on-dentinal-crack-formation-during-retreatment-procedure
#2
Mehmet Çitak, Taha Özyürek
Background. The aim of this study was to compare the dentinal defects caused by Reciproc, TF Adaptive and ProTaper Next NiTi rotary file systems during the retreatment procedure. Methods. A total of 150 mandibular incisors with straight and single root canals were included in the present study. All the root canals were prepared up to an apical diameter 0.40 mm using stainless steel files. Thirty teeth were randomly stored as the negative control group. A total of 120 specimens were obturated with gutta-percha and AH Plus sealer using vertical compaction technique...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/28746745/apical-stress-distribution-under-vertical-compaction-of-gutta-percha-and-occlusal-loads-in-canals-with-varying-apical-sizes-a-3-dimensional-finite-element-analysis
#3
K Yuan, C Niu, Q Xie, W Jiang, L Gao, R Ma, Z Huang
AIM: To investigate and compare the effects of two apical canal instrumentation protocols on apical stress distributions at the root apex under vertical compaction of gutta-percha and occlusal loads using finite element analysis. METHODOLOGY: Three finite element analysis models of a mandibular first premolar were reconstructed: an original canal model, a size 35, 0.04 taper apical enlargement model and a Lightspeed size 60 apical enlargement model. A 15 N compaction force was applied vertically to the gutta-percha 5 mm from the apex...
July 26, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28746492/relationship-between-dental-calcification-and-skeletal-maturation-in-a-peruvian-sample
#4
Rocío M Lecca-Morales, Marcos J Carruitero
Objective: the objective of the study was to determine the relationship between dental calcification stages and skeletal maturation in a Peruvian sample. Methods: panoramic, cephalometric and carpal radiographs of 78 patients (34 girls and 44 boys) between 7 and 17 years old (9.90 ± 2.5 years) were evaluated. Stages of tooth calcification of the mandibular canine, first premolar, second premolar, and second molar and the skeletal maturation with a hand-wrist and a cervical vertebrae method were assessed...
May 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/28746489/three-dimensional-evaluation-of-mandibular-anterior-dental-crowding-in-digital-dental-casts
#5
Luciana Quintanilha Pires Fernandes, Livia Kelly Ferraz Nunes, Luana Santos Alves, Felipe de Assis Carvalho Ribeiro, Jonas Capelli
Introduction: Digital dental models provide a more accurate and comprehensive assessment of orthodontic cases. Although this technique is quite promising, there are few three-dimensional measurements methods described in the literature. Objective: The aim of this study was to propose a method for assessing the degree of mandibular anterior dental crowding in the three planes of space, using digital dental models. Methods: Thirty dental casts were selected and scanned by Maestro 3D Dental Scanner and imported by Geomagic Qualify 2013 software...
May 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/28746488/mandibular-dental-arch-short-and-long-term-spontaneous-dentoalveolar-changes-after-slow-or-rapid-maxillary-expansion-a-systematic-review
#6
Arthur César de Medeiros Alves, Olga Benário Vieira Maranhão, Guilherme Janson, Daniela Gamba Garib
Objective: The aim of this systematic review was to analyze the short and long-term spontaneous dentoalveolar changes of the mandibular dental arch after slow (SME) or rapid (RME) maxillary expansion in the mixed and early permanent dentitions. Methods: An electronic search was performed in the following databases: PubMed/Medline, Cochrane Library, Scopus, Embase and Web of Science. Eligibility criteria for article selection included randomized controlled trials and prospective studies written in English, with no restriction of year of publication, involving patients who underwent SME or RME during the mixed or early permanent dentitions...
May 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/28744904/do-mandibular-complete-dentures-made-using-a-neutral-zone-technique-improve-speech-a-pilot-study
#7
Peter Rehmann, Anna Katharina Künkel, Daniel Weber, Ulrich Lotzmann, Bernd Wöstmann
OBJECTIVE: The aim of this study was to evaluate speech sound production (SSP) in older edentulous patients provided with two different types of mandibular complete dentures (MCDs; conventional vs neutral zone). BACKGROUND: Regarding the fact that complete dentures (CDs) affect SSP, it is unknown whether the set-up of the artificial teeth resulting from the neutral zone technique leads to a negative impact on SSP. MATERIALS AND METHODS: For 21 participants, a conventional MCD and a MCD using a modified neutral zone technique (neutral zone dentures) were fabricated...
July 26, 2017: Gerodontology
https://www.readbyqxmd.com/read/28743605/three-dimensional-analysis-of-the-pharyngeal-airway-space-and-hyoid-bone-position-after-orthognathic-surgery
#8
Amanda Lury Yamashita, Liogi Iwaki Filho, Pablo Cornélius Comelli Leite, Ricardo de Lima Navarro, Adilson Luiz Ramos, Isolde Terezinha Santos Previdelli, Matheus Henrique Dal Molin Ribeiro, Lilian Cristina Vessoni Iwaki
PURPOSE: The aim of this study was to evaluate changes in the pharyngeal airway space (PAS) and hyoid bone position after orthognathic surgery with cone-beam computed tomography (CBCT). MATERIAL AND METHODS: This study was conducted with the tomographic records of 30 patients with skeletal class II or III deformities submitted to two different types of orthognathic surgery: Group 1 (n = 15), maxillary advancement, and mandibular setback; and Group 2 (n = 15), maxillomandibular advancement...
July 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28743430/evaluation-of-the-root-canal-anatomy-of-maxillary-and-mandibular-premolars-in-a-selected-german-population-using-cone-beam-computed-tomographic-data
#9
Sebastian Bürklein, Ricarda Heck, Edgar Schäfer
INTRODUCTION: The aim of this study was to investigate the number of roots and the morphology of the root canals of maxillary and mandibular premolars in a selected German population. METHODS: Randomly selected full-size cone-beam computed tomographic images were collected from 700 patients (45% men and 55% women, average age = 50.21 years). This resulted in a total of 644 first and 512 second maxillary premolars as well as 1044 first and 871 second mandibular premolars...
July 22, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28741742/dental-and-skeletal-maturation-in-female-adolescents-with-temporomandibular-joint-osteoarthritis
#10
Jeong-Hyun Kang, Ill-Hyung Yang, Hong-Keun Hyun, Jeong-Yun Lee
BACKGROUND: Occurrence of temporomandibular disorders (TMDs) and temporomandibular joint (TMJ) osteoarthritis (OA) during adolescence may have interactions with mandibular and dental development. OBJECTIVE: To investigate relationships between occurrence of TMD and TMJ OA and extents of dental and skeletal development in juvenile female patients. METHOD: In total, 95 female adolescents (age range, 11-15 years) were selected. Among them, 15 subjects (control) had no signs of TMD, 39 TMD patients did not have OA (TMDnoOA), 17 TMD patients were at initial stage of TMJ OA (TMJOA), and 27 patients showed progressive stage of TMJ OA (TMJOA)...
July 25, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28741684/how-does-mandibular-bone-atrophy-influence-the-masticatory-function-ohrqol-and-satisfaction-in-overdenture-wearers-clinical-results-until-1-year-post-loading
#11
Raissa Micaella Marcello-Machado, Fernanda Faot, Alessandra Julie Schuster, Amália Machado Bielemann, Otacílio Luiz Chagas Júnior, Altair Antoninha Del Bel Cury
This longitudinal clinical study investigated the differences in the masticatory function (MF), satisfaction and oral health related quality of life (OHRQoL) between atrophic patients (AP) and non-atrophic patients (NAP) before and after rehabilitation with mandibular overdenture (MO). Twenty-six complete denture (CD) wearers were categorized into two groups, according to the mandibular bone atrophy (MBA) degree. MF was evaluated before and after 1, 3, 6 and 12 months of the MO loading via 2 standardized tests: i) MP, masticatory performance (MP_X50, MPB, ME 5...
July 25, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28741427/receptor-activator-of-nuclear-factor-kappa-b-ligand-rankl-induced-local-osteoporotic-canine-mandible-model-for-the-evaluation-of-peri-implant-bone-regeneration
#12
Chang Ah Ryum, Tae Hyung Cho, Soon Jung Hwang
The canine mandible is useful for studying bone regeneration after dental implant placement. However, it is limited in investigations of peri-implant osteogenesis under osteoporotic conditions due to the insignificant osteoporotic effect of ovariectomy. This study aimed to establish a local osteoporotic model without ovariectomy using receptor activator of nuclear factor kappa-B ligand (RANKL) in a canine mandible model. This new model was used to evaluate the effects of injectable β-tricalcium phosphate microsphere bone grafts (TCP) on peri-implant bone regeneration under osteoporotic conditions with combinations of human recombinant bone morphogenetic protein-2 (rhBMP-2)...
July 25, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28740970/anterior-mandibular-rehabilitation-causing-chronic-obstructive-sialadenitis-a-series-of-sialo-cbct-cases-and-literature-review
#13
Naama Keshet, Amir Laviv, Doron J Aframian, Chen Nadler
OBJECTIVE: The aim of this study was to assess and present, using sialo-cone beam computed tomography (sialo-CBCT) examination, cases of submandibular gland (SM) chronic obstructive sialadenitis (COS) caused by dental rehabilitation. DATA SOURCES: Clinical and radiographic data of all patients referred for SM sialo-CBCT imaging in the Oral and Maxillofacial Imaging Unit with recurrent SM swelling between January 2012 and July 2015 were reviewed. Cases with suggested iatrogenic cause were selected and described...
July 20, 2017: Quintessence International
https://www.readbyqxmd.com/read/28740786/virtual-surgical-planning-for-mandibular-distraction-in-infants-with-robin-sequence
#14
Cory M Resnick
Mandibular distraction osteogenesis (MDO) successfully relieves obstructive sleep apnea in many infants with Robin sequence. Preoperative virtual surgical planning and fabrication of three-dimensionally printed cutting guides may lead to further improvements in the MDO technique and decrease the risk for damage to adjacent structures such as developing teeth and the inferior alveolar nerve. This report presents an algorithm for virtual surgical planning and three-dimensionally printing of cutting guides for MDO in infants with RS...
June 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28739355/3-d-computed-tomography-measurement-of-mandibular-growth-after-costochondral-grafting-in-growing-children-with-temporomandibular-joint-ankylosis-and-jaw-deformity
#15
Jieyun Zhao, Dongmei He, Chi Yang, Chuan Lu, Yihui Hu, Dong Huang, Edward Ellis
OBJECTIVE: The aim of this study was to evaluate the long-term results after costochondral grafting (CCG) in growing children with temporomandibular joint ankylosis and jaw deformity by 3-dimensional computed tomography (CT) measurement. STUDY DESIGN: Patients with unilateral TMJ ankylosis and jaw deformity treated by CCG from 2010 to 2014 were evaluated. Their CT data within 1 week after operation and after at least 2 years of follow-up were analyzed using ProPlan CMF 1...
June 13, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28739094/automatic-repositioning-of-jaw-segments-for-three-dimensional-virtual-treatment-planning-of-orthognathic-surgery
#16
Rodrigo Mologni Gonçalves Dos Santos, José Mario De Martino, Luis Augusto Passeri, Romis Ribeiro de Faissol Attux, Francisco Haiter Neto
PURPOSE: To develop a computer-based method for automating the repositioning of jaw segments in the skull during three-dimensional virtual treatment planning of orthognathic surgery. The method speeds up the planning phase of the orthognathic procedure, releasing surgeons from laborious and time-consuming tasks. MATERIALS AND METHODS: The method finds the optimal positions for the maxilla, mandibular body, and bony chin in the skull. Minimization of cephalometric differences between measured and standard values is considered...
July 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28738372/advances-in-oral-appliances-for-obstructive-sleep-apnea
#17
Ofer Jacobowitz
Oral appliances that advance the mandible are widely used as alternatives to positive airway pressure (PAP) devices or as primary therapy for obstructive sleep apnea (OSA) in adults. Although PAP is more efficacious at lowering the polysomnographic indices of OSA, the clinical effectiveness of PAP and oral appliances is similar, and patients are more likely to adhere to oral appliance therapy than to PAP treatment. Clinical examination is used to determine the candidacy of oral appliances and to select a particular appliance for a given patient...
2017: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28738365/advances-in-box-surgery-for-obstructive-sleep-apnea-genioglossus-advancement-hyoid-suspension-and-maxillomandibular-advancement
#18
Yau Hong Goh, Winston Tan, Victor James Abdullah, Sung Wan Kim
Box surgery for obstructive sleep apnea (OSA) patients consists of mandibular surgery, including genioglossus advancement, hyoid suspension, and maxillomandibular advancement, as an airway reconstruction. This surgery was developed in the early 1980s. Thereafter, techniques were modified in each surgery for the enhancement of outcome and prevention of complications. However, the indication for surgery remains poorly defined due to the dynamicity of the upper airway, variability of the phenotype in OSA patients, and absence of a representative method for the obstruction site in the upper airway...
2017: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28738340/novel-positional-devices-for-the-treatment-of-positional-obstructive-sleep-apnea-and-how-this-relates-to-sleep-surgery
#19
Madeline J L Revesloot, Linda Benoist, Peter van Maanen, Nico de Vries
If untreated, obstructive sleep apnea (OSA) develops as a gradual progressive disease. In the early stage of the disease most patients with OSA are positional. The archetypical patient might progress from simple positional snoring via positional early-stage mild disease to less positional moderate and finally nonpositional severe OSA. At first, the apnea-hypopnea index (AHI) is high only in the supine position, and later is high in all sleeping positions. The phenomenon is reversible. After partial effective treatment, patients with severe OSA can reverse to less severe positional OSA or, in other words, the AHI drops more in the lateral position than in supine position...
2017: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28738322/pediatric-obstructive-sleep-apnea-where-do-we-stand
#20
Yu-Shu Huang, Christian Guilleminault
Pediatric obstructive sleep apnea (OSA) was initially described in 1976. In 1981, Dr. Guilleminault emphasized that pediatric OSA was different from the clinical presentation reported in adults. It was characterized by more disturbed nocturnal sleep than excessive daytime sleepiness, and presented more behavioral problems, particularly school problems, hyperactivity, nocturnal enuresis, sleep terrors, depression, insomnia, and psychiatric problems. The underlying causes of pediatric OSA are complex. Such factors as adenotonsillar hypertrophy, obesity, anatomical and neuromuscular factors, and hypotonic neuromuscular disease are also involved...
2017: Advances in Oto-rhino-laryngology
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