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Molar teeth

Laura Burgueño Torres, María Rosa Mourelle Martínez, Montserrat Diéguez Pérez, Joaquín M de Nova García
AIM: To analyse differences in the eruption of primary teeth between both sexes. MATERIALS AND METHODS: A cross-sectional study was performed in a sample of 1250 children aged between 3 and 42 months. The clinical emergence of teeth was taken to estimate average ages for primary teeth eruption. The t-test was used to analyse gender and arch differences. RESULTS: Eruption of primary teeth began at the same time in girls as in boys; although the eruptive process was longer in girls...
March 14, 2018: Acta Odontologica Scandinavica
Hussam Alfawaz, Abdullah Alqedairi, Abdulrahman K Alkhayyal, Abdulaziz A Almobarak, Mohannad F Alhusain, Jorge N R Martins
OBJECTIVES: The purpose of this study was to determine the prevalence of the C-shaped root canal configuration, location of the longitudinal groove, sex differences, and unilateral/bilateral presence in mandibular first and second molars in a Saudi population using cone beam computed tomography (CBCT). MATERIALS AND METHODS: CBCT images for the mandibular first and second molars of 487 patients (a total of 529 first molars and 681 s molars) were evaluated. The teeth were assessed for the presence of C-shaped root canals according to Fan criteria...
March 13, 2018: Clinical Oral Investigations
Prasad K Musale, Sneha S Kothare, Abhishek S Soni
This narrative aims at reviewing the available literature for mineral trioxide aggregate (MTA) pulpotomy to understand the procedure better and eventually improve the clinical and radiographic outcomes. An electronic search was conducted in PubMed, Cochrane, ScienceDirect and ClinicalKey databases with the following keywords: MTA pulpotomy, clinical outcomes, radiographic outcomes, primary teeth. No specific inclusion or exclusion criteria were applied as to what articles would be included in this review. The time period for the search began from 2001 with respect to MTA pulpotomy...
2018: Clinical, Cosmetic and Investigational Dentistry
In-Ja Kim, Heung-Soo Lee, Hyun-Jeong Ju, Ja-Young Na, Hyo-Won Oh
BACKGROUND: A recent study in Canada reported that vitamin D deficiency is associated with dental caries. Because Koreans have been reported to be deficient in vitamin D, we investigated the relationship between dental caries and reduced serum vitamin D levels in Korean children. The purpose of this study was to analyze the relationships between blood vitamin D [25(OH)D] concentrations and dental caries in the permanent dentition of Korean children. METHODS: Data were collected from the Korea National Health and Nutrition Examination Survey performed in 2008-2013...
March 13, 2018: BMC Oral Health
Yazan Hassona, Dina Taimeh, Lamis Rajab, Crispian Scully
OBJECTIVES: To describe the oro-facial manifestations and dental management in a girl with Sanjad Sakati syndrome. CLINICAL PRESENTATION AND INTERVENTION: Facial features included microcephaly, thin lips, beaked nose, low set ears, and a retrognathic mandible. Oral examination revealed oligodontia/hypodontia, small dental arches, high arched palate, and a deep overbite and increased overjet. Oral rehabilitation involved full coverage prosthetic crowns on upper central incisors, stainless steel crowns on lower molars, and removable partial prostheses to replace missing teeth...
March 13, 2018: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
Yuka Tanaka, Hiroshi Shiga
PURPOSE: To clarify whether the occlusal state affects the masticatory performance of elderly adults. METHODS: Elderly women were asked to chew a gummy jelly, and the amount of glucose extraction was measured as the parameter for masticatory performance. Subjects were divided into five groups depending on occlusal support on the habitual chewing side (G1: no occlusal support of posterior teeth, G2: occlusal support of first premolar, G3: occlusal support of premolars, G4: occlusal support from first premolar to first molar, and G5: occlusal support from first premolar to second molar)...
March 9, 2018: Journal of Prosthodontic Research
Priyam Jani, Chao Liu, Hua Zhang, Khaled Younes, M Douglas Benson, Chunlin Qin
OBJECTIVE: The bone morphogenetic proteins (BMPs) play crucial roles in tooth development. However, several BMPs retain expression in the dentin of the fully patterned and differentiated tooth. We hypothesized that BMP signaling therefore plays a role in the function of the differentiated odontoblast, the job of which is to lay down and mineralize the dentin matrix. DESIGN: We generated mice deficient in Bmp2 and 4 using a dentin matrix protein 1 (Dmp1) promoter-driven cre recombinase that was expressed in differentiated odontoblasts...
February 7, 2018: Archives of Oral Biology
Damla Tuncer Budanur, Noushin Zibandeh, Deniz Genç, Muazzez Gökalp, Kamber Kaşali, Tunç Akkoç, Elif Sepet
BACKGROUND/AIM: Ectoine is an amino acid that can preserve osmotic balance and has more preservative activity than other osmoregulators. There are no published reports on the osmoregulators' effects on viability or differentiation of dental stem cells. The aim of this study was to investigate the effect of Ectoine as a storage media on the viability and differentiation potential of human periodontal ligament mesenchymal stem cells (hPDLMSCs). MATERIALS AND METHODS: hPDLMSCs were obtained from impacted third molar teeth...
March 12, 2018: Dental Traumatology: Official Publication of International Association for Dental Traumatology
Renata Nunes Cabral, Jorge Faber, Simone Auxiliadora Morais Otero, Leandro Augusto Hilgert, Soraya Coelho Leal
OBJECTIVES: The aim of this study was to compare the caries-preventive effect and the retention rates of sealants prepared with a new modified and a high-viscosity glass-ionomer cement (GIC) in recently erupted first permanent molars.  MATERIALS AND METHODS: Fifty-six children (224 teeth) were included in a split-mouth randomised clinical trial. All children had their four first permanent molars sealed with either Clinpro XT Varnish (CXT) or Fuji IX GP FAST (FJ). FJ sealants were placed according to the ART protocol...
March 9, 2018: Clinical Oral Investigations
Ryan L Wong, Sarah Hiyari, Aline Yaghsezian, Mina Davar, Maísa Casarin, Yi-Ling Lin, Sotirios Tetradis, Paulo M Camargo, Flavia Q Pirih
BACKGROUND: Peri-implantitis is an inflammatory response to bacterial biofilm resulting in bone loss and can ultimately lead to implant failure. Due to the lack of predictable treatments available, a thorough understanding of peri-implantitis's pathogenesis is essential. The objective of this study is to evaluate and compare the response of acute induced peri-implantitis and periodontitis lesions after insult removal. METHODS: Implants were placed in one-month-old C57BL/6J male mice eight weeks post extraction of their left maxillary molars...
February 19, 2018: Journal of Periodontology
Matshediso Mothopi-Peri, C Peter Owen
PURPOSE: To compare the influence of abutment teeth guide planes and guiding surfaces on retention of a removable partial denture (RPD). MATERIALS AND METHODS: Extracted teeth embedded into a maxillary cast in the first premolar and second molar positions simulated two bounded saddles. Acrylic resin RPDs were made with no guide planes, then with guide planes, then with guiding surfaces added to directly contact the guide planes. The maximum loads on removal from the cast were recorded...
March 2018: International Journal of Prosthodontics
Aki Kitaoka, Ryo Akatsuka, Hiroaki Kato, Nobuhiro Yoda, Keiichi Sasaki
PURPOSE: This study aimed to prospectively evaluate the clinical performance of monolithic zirconia crowns made of yttria-stabilized tetragonal zirconia polycrystal. MATERIALS AND METHODS: A total of 26 crowns placed on premolar or molar teeth in 18 patients were evaluated at the time of crown placement and at 2 weeks, 6 months, 1 year, and 2 years after placement. RESULTS: Twenty-five crowns rated as satisfactory according to the California Dental Association quality evaluation system...
March 2018: International Journal of Prosthodontics
Junaid Malik, Jose Rodriguez, Michael Weisbloom, Haralampos Petridis
PURPOSE: To compare the accuracy (ie, precision and trueness) of full-arch impressions fabricated using either a conventional polyvinyl siloxane (PVS) material or one of two intraoral optical scanners. MATERIALS AND METHODS: Full-arch impressions of a reference model were obtained using addition silicone impression material (Aquasil Ultra; Dentsply Caulk) and two optical scanners (Trios, 3Shape, and CEREC Omnicam, Sirona). Surface matching software (Geomagic Control, 3D Systems) was used to superimpose the scans within groups to determine the mean deviations in precision and trueness (μm) between the scans, which were calculated for each group and compared statistically using one-way analysis of variance with post hoc Bonferroni (trueness) and Games-Howell (precision) tests (IBM SPSS ver 24, IBM UK)...
March 2018: International Journal of Prosthodontics
Franziska Haupt, M Hülsmann
OBJECTIVES: To assess the consistency of electronic determination of endodontic working length obtained from four identical electronic root canal length measurement devices (ERCLMD) from five different types of ERCLMD each under various in vitro conditions. MATERIALS AND METHODS: Eight extracted teeth, seven single-rooted teeth, and one molar were accessed. Root length was measured and instruments were inserted and fixed with the tip placed beyond and short of the apical constriction, in roots with an artificial perforation or an open apex...
March 7, 2018: Clinical Oral Investigations
Abrar Alanzi, Anfal Faridoun, Katerina Kavvadia, Aghareed Ghanim
BACKGROUND: Molar-incisor Hypomineralisation (MIH) is considered as a global dental problem. There is little knowledge of general dental practitioners (GDPs) and dental specialists (DSs) about this condition in different parts of the world, particularly in Gulf Cooperation Council (GCC) countries. Hence, this study has been carried out to assess the knowledge of GDPS and DSs in Kuwait about MIH condition, its clinical presentation and management. Findings would help national school oral health program (SOHP) to promote good oral healthcare...
March 7, 2018: BMC Oral Health
Carine Weber Pires, Djessica Pedrotti, Tathiane Larissa Lenzi, Fabio Zovico Maxnuck Soares, Patricia Klarmann Ziegelmann, Rachel de Oliveira Rocha
This study aimed to compare the longevity of different conventional restorative materials placed in posterior primary teeth. This systematic review was conducted following the PRISMA statement and registered in PROSPERO (CRD42016035775). A comprehensive electronic search without date or language restrictions was performed in PubMed/MEDLINE, Cochrane Central Register of Controlled Trials, Scopus, Turning Research Into Practice (TRIP) and Clinical Trials databases up to January 2017, selecting randomized clinical trials that assessed the longevity of at least two different conventional restorative materials performed in primary molars...
March 1, 2018: Brazilian Oral Research
J P Andrade, D Stona, H R Bittencourt, G A Borges, L H Burnett, A M Spohr
The aim was to evaluate, in vitro, the influence of different computer-aided design/computer-aided manufacturing (CAD/CAM) materials (IPS e.max CAD, Vita Enamic, and Lava Ultimate) and thicknesses (0.6 mm and 1.5 mm) on the fracture resistance of occlusal veneers. Sixty human third molars were prepared to simulate advanced erosion of the occlusal surface, and the teeth were randomly divided into six experimental groups (n=10) according to the material and thickness used to build the veneers. Ten sound teeth formed the control group...
March 7, 2018: Operative Dentistry
Amin Salem Milani, Mohammad Froughreyhani, Saeed Rahimi, Vahid Zand, Mohammad Asghari Jafarabadi
The aim of this study was to provide an evidence-based answer to the question: "Is 3.6-mL volume of an anesthetic agent more effective than 1.8-mL volume in providing anesthesia for mandibular molars?" Following formulation of research question and keyword selection, a comprehensive search of the following databases was conducted: Cochrane library, PubMed, Scopus, Google Scholar, ProQuest, and Three-phase eligibility appraisal and quality assessment of the studies were carried out by 2 independent reviewers...
2018: Anesthesia Progress
András Forster, Gábor Braunitzer, Máté Tóth, Balázs P Szabó, Márk Fráter
PURPOSE: Molar MOD (mesial-occlusal-distal) cavity preparation weakens relative cuspal stiffness by up to 63%, often resulting in cuspal fracture. This investigation inspects fracture resistance of MOD cavities restored using direct composite restoration. MATERIALS AND METHODS: 120 extracted, intact mandibular molars were selected. MOD cavities with different depth/wall thickness were prepared in 9 groups (n = 12): A: 3 mm/3.5 mm, B: 3 mm/2.5 mm, C: 3 mm/1.5 mm, D: 5 mm/3...
March 5, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Maite Cevallos Mijan, Soraya Coelho Leal, Ewald M Bronkhorst, Jo E Frencken
PURPOSE: To determine whether the frequency of microleakage at the margin of the tooth-restoration interface in primary molars restored with high-viscosity glass-ionomer cement (HVGIC) differs from that of primary molars restored with amalgam. MATERIALS AND METHODS: The HVGIC restorations were performed according to the ART method. A total of 19 naturally exfoliated primary molars (10 amalgam and 9 ART/HVGIC) with clinically assessed intact restorations fulfilled the inclusion criteria...
2018: Journal of Adhesive Dentistry
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