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Suguru Kimoto, Yasuhiko Kawai, Atsuko Gunji, Hisatomo Kondo, Taro Nomura, Tomohiko Murakami, Akito Tsuboi, Guang Hong, Shunsuke Minakuchi, Yusuke Sato, Gaku Ohwada, Tetsuya Suzuki, Katsuhiko Kimoto, Noriyuki Hoshi, Makiko Saita, Yoshikazu Yoneyama, Yohei Sato, Masakazu Morokuma, Joji Okazaki, Takeshi Maeda, Kenichiro Nakai, Tetsuo Ichikawa, Kan Nagao, Keiko Fujimoto, Hiroshi Murata, Tadafumi Kurogi, Kazuhiro Yoshida, Masahiro Nishimura, Yasuhiro Nishi, Mamoru Murakami, Toshio Hosoi, Taizo Hamada
BACKGROUND: Denture adhesives, characterized as medical products in 1935 by the American Dental Association, have been considered useful adjuncts for improving denture retention and stability. However, many dentists in Japan are hesitant to acknowledge denture adhesives in daily practice because of the stereotype that dentures should be inherently stable, without the aid of adhesives. The aim of this study is to verify the efficacy of denture adhesives to establish guidelines for Japanese users...
October 18, 2016: Trials
Sho Kayumi, Yoshiyuki Takayama, Atsuro Yokoyama, Nana Ueda
BACKGROUND: The purpose of this study was to investigate the influence of occlusal forces (the contractile force of masticatory muscles) exerted during occlusal adjustment on the distribution of the forces among teeth, implants, and temporomandibular joints (TMJs) in intercuspal clenching in cases with bilateral missing molars and premolars by using finite element analysis. METHODS: A three-dimensional finite element model of the mandible with eight implants in the premolar and molar regions was constructed...
December 2015: Int J Implant Dent
Rachel Gomes Cardoso, Laércio Almeida de Melo, Gustavo Augusto Seabra Barbosa, Patrícia Dos Santos Calderon, Adriano Rocha Germano, Wilson Mestriner, Adriana da Fonte Porto Carreiro
The aim of this non-randomized controlled clinical trial was to evaluate the oral health-related quality of life and masticatory efficiency of patients rehabilitated with mandibular two-implant overdentures with immediate loading or conventional dentures. Fifty completely edentulous patients wearing bimaxillary conventional dentures, for at least one year, were recruited. The patients were then assigned to either two treatment groups: mandibular overdentures supported by two implants with bar-clip system and a maxillary conventional denture (n = 25), and new maxillary and mandibular conventional complete dentures (n = 25)...
October 10, 2016: Brazilian Oral Research
Francielle A Mendes, Tânia de F Borges, Luiz C Gonçalves, Terezinha Rc de Oliveira, Célio J do Prado, Flávio D das Neves
The aim of this study is to evaluate the effects of replacing poorly fitting dentures on patient's masticatory function, satisfaction and oral health-related quality of life. Fourteen patients with conventional maxillary complete dentures and mandibular overdentures retained by two implants bar clip system had their dentures replaced. The laboratory tests for the analysis of masticatory performance were conducted using an "Optocal" food simulator test. Questionnaires were used to evaluate patient satisfaction with dentures and impact of oral health on quality of life...
September 2016: Acta Odontológica Latinoamericana: AOL
S Kang, C Zhang, T Ohno, M Azuma
The PD-1/B7-H1 pathway regulates immune responses and maintains homeostasis. Here, we identified a unique expression of B7 homolog 1 (B7-H1) on masticatory mucosae in the oral cavity. B7-H1 was physiologically expressed on the dorsal surface of the tongue, gingiva, and hard palate. Other squamous epithelia and other structures of the epithelia did not express B7-H1 in the steady state. Physiological B7-H1 expression on masticatory mucosae was limited on prickle cells, and its expression on basal keratinocytes (KCs) was strictly regulated...
October 12, 2016: Mucosal Immunology
Cláudia Maria de Felício, Franciele Voltarelli da Silva Dias, Gislaine Aparecida Folha, Leila Azevedo de Almeida, Jaqueline Freitas de Souza, Wilma Terezinha Anselmo-Lima, Luciana Vitaliano Voi Trawitzki, Fabiana Cardoso Pereira Valera
OBJECTIVES: The purposes of this study were (1) to identify possible differences in muscular and orofacial functions between children with obstructive sleep apnea (OSA) and with primary snoring (PS); (2) to examine the standardized difference between normal values of myofunctional scores and those of subjects with OSA or PS; and (3) to identify the features associated with OSA. METHODS: Participants were 39 children (mean age 8 ± 1.2 years) of which, 27 had a diagnosis of OSA and 12 had PS...
November 2016: International Journal of Pediatric Otorhinolaryngology
Isabelle Breton-Torres, Manon Serre, Patrick Jammet, Jacques Yachouh
INTRODUCTION: The temporomandibular joint is highly adaptive and masticatory apparatus disorders (MAD) can occur when its ability to adapt is overwhelmed. Occlusal etiologies were long pinpointed as the sole culprits. However, a consensus now exists which minimizes their involvement. It is recognized that the etiology of MAD is multifactorial, combining occlusal problems, parafunctions, postural anomalies, orofacial dyspraxia and stress. MATERIALS AND METHODS: In this article, the authors review the role of physiotherapy in managing these pathologies...
September 2016: L' Orthodontie Française
Daniela D Pompeo, Henrique D Rosário, Beatriz Mv Lopes, Paulo F Cesar, Luiz Renato Paranhos
CONTEXT: Bracket debonding is a common problem during orthodontic treatment. This type of failure is associated to masticatory forces, poor adhesion, and the need for repositioning the piece. AIMS: The objective of this work was to compare the shear bond strength of debonded brackets that were reconditioned using different protocols (alumina blasting versus hydrofluoric etching). SETTINGS AND DESIGN: This was an in vitro experimental study with 45 stainless steel orthodontic brackets...
July 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
Poornima Patel, Faisal Idrees, Vilas Newaskar, Deepak Agrawal
BACKGROUND: Internal derangement of the temporomandibular joint (TMJ) is one of the most common forms of temporomandibular disorders. The minimally invasive treatments such as arthrocentesis as well as arthroscopic lysis and lavage are often used as a first-line surgical treatment or in conjunction with nonsurgical modalities with low morbidity and high efficacy. Sodium hyaluronate (SH) has been proposed as an alternative therapeutic agent with similar therapeutic effects. OBJECTIVE: A prospective study was carried out for evaluation of efficacy of TMJ arthrocentesis with and without injection of SH in management of internal derangements...
October 6, 2016: Oral and Maxillofacial Surgery
Keyong Yuan, Chenguang Niu, Qian Xie, Wenxin Jiang, Li Gao, Zhengwei Huang, Rui Ma
Minimally invasive endodontics emphasizes preservation of a maximal amount of healthy tooth tissue. However, whether the tooth structure preserved by minimally invasive endodontics can maintain higher fracture resistance is unclear. This study aimed to compare the biomechanics on teeth after minimally invasive (MI) preparation and straight-line (SL) preparation using finite element analysis. Six finite element analysis models of a mandibular first molar were constructed and divided into two groups (MI and SL)...
October 5, 2016: European Journal of Oral Sciences
Man-Kyo Chung, Jennifer Park, Jamila Asgar, Jin Y Ro
BACKGROUND: Chronic pain in masticatory muscles is a major medical problem. Although mechanisms underlying persistent pain in masticatory muscles are not fully understood, sensitization of nociceptive primary afferents following muscle inflammation or injury contributes to muscle hyperalgesia. It is well known that craniofacial muscle injury or inflammation induces regulation of multiple genes in trigeminal ganglia, which is associated with muscle hyperalgesia. However, overall transcriptional profiles within trigeminal ganglia following masseter inflammation have not yet been determined...
2016: Molecular Pain
M de-Pedro-Herráez, J Mesa-Jiménez, C Fernández-de-Las-Peñas, J-L de-la-Hoz-Aizpurua
Myogenic temporomandibular disorders (MTMD) frequently coexist with other clinical conditions in the same individual. In the last decades, several authors have analyzed these comorbidities looking for the origin of this overlapping. _Objetives: The aim of this study was to perform a comparative anaylisis between a group of patients with MTMD and a control group of dental patients without dysfunctional pathology to assess whether there are significant differences in the presence of systemic medical comorbidities between the two groups...
October 1, 2016: Medicina Oral, Patología Oral y Cirugía Bucal
Renu Parmar, Vijay Reddy, Satheesh Kumar Reddy, Deepti Reddy
INTRODUCTION: A wide variety of factors affect the success of orthodontic miniscrews in clinical situations, including thickness of the soft tissues. Our objectives were to assess area-related and sex-related differences in the soft tissue thicknesses of the buccal attached gingiva of the maxilla and the mandible, and the palatal masticatory mucosa at common orthodontic miniscrew placement sites, and to prescribe a guideline for miniscrew selection for a predictable clinical outcome. METHODS: The sample consisted of 32 randomly selected adults in the age group of 20 to 25 years...
October 2016: American Journal of Orthodontics and Dentofacial Orthopedics
Ute Ulrike Botzenhart, Constantin Wegenstein, Teodor Todorov, Christiane Kunert-Keil
The most widespread animal model to investigate Duchenne muscular dystrophy is the mdx-mouse. In contrast to humans, phases of muscle degeneration are replaced by regeneration processes; hence there is only a restricted time slot for research. The aim of the study was to investigate if an intramuscular injection of BTX-A is able to break down muscle regeneration and has direct implications on the gene expression of myosin heavy chains in the corresponding treated and untreated muscles. Therefore, paralysis of the right masseter muscle was induced in adult healthy and dystrophic mice by a specific intramuscular injection of BTX-A...
2016: BioMed Research International
Nicolai Jansson
OBJECTIVE: To report the outcome of conservative management of unilateral fractures of the mandibular rami in horses. STUDY DESIGN: Retrospective case series. ANIMALS: 24 client-owned horses with unilateral mandibular fractures METHODS: Medical records (January 2000-January 2014) of horses with unilateral mandibular ramus fractures were retrieved. Only conservatively managed horses with follow-up information were included. Follow-up information on clinical outcome was retrieved from the medical records (n=11) or obtained by telephone interviews with the owners or trainers (n=13)...
September 29, 2016: Veterinary Surgery: VS
Celso Roberto Passeri, Jacira Alves Caracik de Camargo Andrade, Karla Thaíza Tomal, Eduardo Marcucci Pracucho, Livia Paschoalino de Campos, Silvia Helena de Carvalho Sales-Peres
Background: Obesity and metabolic syndrome can be labeled as worldwide outbreak; thus, both have led to serious public health problem. Oral health can be worsened by both, obesity and metabolic syndrome. Tooth loss harms masticatory function, essential status to whom will be submitted to bariatric surgery. Aim: Assess masticatory function of obese candidates to bariatric surgery, who belong to distinct socioeconomic class range, in order to recognize hazard factors and the bias of socioeconomic factor in this context...
2016: Arquivos Brasileiros de Cirurgia Digestiva: ABCD, Brazilian Archives of Digestive Surgery
Mohammed Assayed Mousa, Edward Lynch, Mohd G Sghaireen, Abdalwhab M A Zwiri, Osama A Baraka
PURPOSE: To evaluate the influence of time on masticatory efficiency and muscular activity during mastication of different types of test foods in participants fitted with a lower bilateral free-end saddle removable partial denture (RPD) with wide or narrow teeth. METHODS: Thirty-six participants consented to undergo evaluation of their masticatory efficiency and recording of their muscular activity, while they wore an RPD with a unified bilateral design, during mastication of different types of test foods...
September 29, 2016: International Dental Journal
Ken Oda, Manabu Kanazawa, Shin Takeshita, Shunsuke Minakuchi
STATEMENT OF PROBLEM: The rotational movement of an implant overdenture (IOD) has a negative effect on the perceived masticatory ability of the denture wearer. However, the influence of implant number on the movement of IODs has not been investigated. PURPOSE: The purpose of this in vitro study was to evaluate the denture movement of mandibular IODs anchored by different numbers of implants. MATERIAL AND METHODS: An edentulous mandibular test model with artificial mucosa and 5 experimental overdentures (N=5) was fabricated...
September 24, 2016: Journal of Prosthetic Dentistry
QiaoDong Huang, XiaoMing Liu, JinSheng Chen, CunJu Bao, DongYang Liu, ZeZang Fang, XiaoYu Liang, ZhenHe Lu, Li Wan
BACKGROUND: Trigeminal neuralgia (TN) is a pain appearing in the ophthalmic (V1), maxillary (V2), and mandibular (V3) trigeminal branches. Pharmacologic treatment is the first line for TN; however, many patients prefer to receive minimally invasive treatment rather than medicine because of intolerable side effects. Thermocoagulation radiofrequency (TRF) is a minimally invasive treatment that has been shown to effectively treat the maxillary (V2) and mandibular (V3) divisions, but the safety of TRF treatment of the ophthalmic (V1) division has been controversial...
September 2016: Pain Physician
Polliane M Carvalho, Paula M Castelo, Guy H Carpenter, Maria Beatriz D Gavião
This study aimed to investigate masticatory function and taste and their possible relationship with salivary flow in young adults with good oral health. The study also examined whether anthropometric measurements and gender could influence the variables studied. A total of 171 subjects were selected (125 females, 46 males). Masticatory performance was evaluated with the sieve method, and perceived masticatory ability was measured using the visual analogue scale. Taste was evaluated using the drop test with four different flavors in three different concentrations, and unstimulated and stimulated saliva flows were measured...
2016: Journal of Oral Science
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