29 results match your criteria m3s area

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In situ observations on the dentition and oral cavity of the Neanderthal skeleton from Altamura (Italy).

PLoS One 2020 2;15(12):e0241713. Epub 2020 Dec 2.

Department of Environmental Biology, Sapienza University of Rome, Roma, Italy.

The Neanderthal specimen from Lamalunga Cave, near Altamura (Apulia, Italy), was discovered during a speleological survey in 1993. The specimen is one of the most complete fossil hominins in Europe and its state of preservation is exceptional, although it is stuck in calcareous concretions and the bones are mostly covered by calcite depositions. Nevertheless, it is possible to carry out some observations on craniodental features that have not previously been described. Read More

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January 2021

Growth and development of the third permanent molar in Paranthropus robustus from Swartkrans, South Africa.

Sci Rep 2020 11 4;10(1):19053. Epub 2020 Nov 4.

UMR 7194 CNRS, Muséum National D'Histoire Naturelle, Musée de L'Homme, Paris, France.

Third permanent molars (M3s) are the last tooth to form but have not been used to estimate age at dental maturation in early fossil hominins because direct histological evidence for the timing of their growth has been lacking. We investigated an isolated maxillary M3 (SK 835) from the 1.5 to 1. Read More

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November 2020

Challenges and opportunities for telehealth in the management of chronic obstructive pulmonary disease: a qualitative case study in Greece.

BMC Med Inform Decis Mak 2020 09 10;20(1):216. Epub 2020 Sep 10.

Laboratory of Computer Science, Medical Informatics and Biomedical Imaging Technologies, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.

Background: Telehealth (TH) was introduced as a promising tool to support integrated care for the management of chronic obstructive pulmonary disease (COPD). It aims at improving self-management and providing remote support for continuous disease management. However, it is often not clear how TH-supported services fit into existing pathways for COPD management. Read More

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September 2020

Relationships between skeletal morphology and patterns of bilateral agenesis of third molars in Japanese orthodontic patients.

Odontology 2021 Jan 10;109(1):201-209. Epub 2020 Apr 10.

Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Life Dentistry At Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata, 951-8580, Japan.

The aim of this study was to reveal the correlations between bilateral agenesis of third molars (M3s) and skeletal morphology in Japanese male and female orthodontic patients. Sixty patients (30 males, 30 females), with bilateral agenesis of maxillary M3s and without agenesis of mandibular M3s (group U), and 60 patients (30 males, 30 females), with bilateral agenesis of mandibular M3s and without agenesis of maxillary M3s (group L), were selected as agenesis groups. Additionally, 60 patients (30 males, 30 females) with all four M3s were selected as the control group (group C). Read More

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January 2021

A systematic map and in-depth review of European telehealth interventions efficacy for chronic obstructive pulmonary disease.

Respir Med 2019 Oct - Nov;158:78-88. Epub 2019 Sep 9.

Department of Smart Interfaces and Modules, Philips Research, High Tech Campus 34, Eindhoven, 5656AE, the Netherlands. Electronic address:

Background: Evidence to support the implementation of telehealth (TH) interventions in the management of chronic obstructive pulmonary disease (COPD) varies throughout Europe. Despite more than ten years of TH research in COPD management, it is still not possible to define which TH interventions are beneficial to which patient group. Therefore, informing policymakers on TH implementation is complicated. Read More

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Prevalence and patterns of tooth agenesis among malocclusion classes in a Japanese orthodontic population.

J Oral Sci 2019 Nov 20;61(4):504-507. Epub 2019 Sep 20.

Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Life Dentistry at Niigata, The Nippon Dental University.

The purpose of the present study was to assess, in detail, the association between tooth agenesis (TA) and various sagittal skeletal malocclusion groups in a Japanese orthodontic population. One thousand and twenty patients were divided into skeletal Class I, II, or III malocclusion groups using the A point, nasion, and B point angle. TA was identified in each group using panoramic radiographs. Read More

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November 2019

Initial third molar development is delayed in jaws with short distal space: An early impaction sign?

Arch Oral Biol 2019 Oct 4;106:104475. Epub 2019 Jul 4.

College of Medicine, Department of Anatomy, Physiology & Pharmacology, 3B38 - 107 Wiggins Road, Health Sciences Building, University of Saskatoon, Saskatchewan, S7N 5E5, Canada. Electronic address:

Introduction: The multifactorial aetiology of third molar (M3) impaction remains puzzling. While short retromolar jaw space is a well-established risk factor in young adults, space alone does not explain how impaction develops. Here we investigated in children and adolescents a potential new factor, delayed M3 development. Read More

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October 2019

Trophic dynamics (Dissolved Inorganic Nitrogen-DIN and Dissolved Inorganic Phosphorus-DIP) in tropical urban estuarine systems during periods of high and low river discharge rates.

An Acad Bras Cienc 2019 May 23;91(2):e20180244. Epub 2019 May 23.

Departamento de Oceanografia/DOCEAN, Universidade Federal de Pernambuco/UFPE, Av. Arquitetura, s/n, 50740-550 Recife, PE, Brazil.

This paper focused on the use of the biogeochemical LOICZ (Land Ocean Interactions in the Coastal Zone) to investigate the dynamics of DIN and DIP nutrients among three highly urbanized tropical estuaries (Barra das Jangadas (BJ), Recife (RE) and Timbó (TB)), located in the northeastern region of Brazil. The input data were obtained through in situ measurements (2007) and governmental agency databases (2001-2007). The balances of the non-conservative elements showed that the RE and TB systems alternated between sources and sinks during the observation periods (0. Read More

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External root resorption in maxillary and mandibular second molars associated with impacted third molars: a cone-beam computed tomographic study.

Clin Oral Investig 2019 Dec 22;23(12):4195-4203. Epub 2019 Feb 22.

Guangdong Province Key Laboratory of Stomatology, Guangzhou, 510080, Guangdong, China.

Objective: To separately investigate the prevalence and risk factors of external root resorption (ERR) in maxillary and mandibular second molars (M2s) adjacent to impacted third molars (M3s).

Materials And Methods: CBCT scans involving 184 maxillary and 323 mandibular impacted M3s were included. Age, gender, the impaction status of M3, the presence, severity, and location of ERR in M2 were assessed. Read More

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December 2019

Correlation Between Lower Third Molar Impaction Types and Mandibular Angle and Condylar Fractures: A Retrospective Study.

J Oral Maxillofac Surg 2019 Mar 29;77(3):556-564. Epub 2018 Sep 29.

Dentist, Student Research Committee, Mashhad Dental School, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address:

Purpose: The purpose of this study was to investigate and determine the relations between mandibular third molar (M3) impaction types and mandibular angle and condylar fractures.

Materials And Methods: A retrospective study was conducted in patients with mandibular angle and condylar fractures referred to the Oral and Maxillofacial Surgery Department of the Shahid Kamyab Hospital (Mashhad, Iran) from 2013 to 2018. Data sources were patients' hospital documents and panoramic radiographs. Read More

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Permanent tooth emergence: Timing and sequence in a sample of Black Southern African children.

Am J Phys Anthropol 2018 12 3;167(4):827-839. Epub 2018 Oct 3.

Human Variation and Identification Unit, School of Anatomical Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.

Objectives: This study investigates mean age, sequence, and temporal trends of permanent tooth emergence in Black Southern African children and compares the findings with other population samples.

Materials And Methods: This community-based cross-sectional study involved 639 Black Southern African children between 5 and 20 years of age. Probit analysis was used to derive the mean age at emergence of the permanent teeth. Read More

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December 2018

Suidae from Kanapoi.

J Hum Evol 2020 03 21;140:102337. Epub 2017 Oct 21.

Departamento de Antropología, Universidad de Chile, Santiago, Chile; Institute of Cognitive and Evolutionary Anthropology, University of Oxford, Oxford, UK.

The whole collection of Suidae from Kanapoi is revised in the context of the systematics and evolution of Nyanzachoerus in the Pliocene of Eastern Africa. It contains only two species, Nyanzachoerus kanamensis and Notochoerus jaegeri. The size and morphology of their premolars overlap, but not those of their m3s. Read More

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American Association of Oral and Maxillofacial Surgeons' Anesthesia and Third Molar Extraction Benchmark Study: Rationale, Methods, and Initial Findings.

J Oral Maxillofac Surg 2016 May 10;74(5):903-10. Epub 2015 Dec 10.

AAOMS Senior Research Associate, Department of Oral and Maxillofacial Surgery, University of Washington School of Dentistry, Seattle, WA.

Purpose: Benchmark statistics are used in quality assurance/quality improvement processes. The purposes of the present report are to 1) review the rationale for a new specialty-specific benchmark study, 2) summarize the methods to create a practice-based research collaborative (P-BRC) designed for collecting data to create benchmarks, and 3) describe the characteristics of the P-BRC surgeon participants.

Materials And Methods: The study was designed as a prospective cohort study. Read More

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Impacted mandibular third molars and their influence on mandibular angle and condyle fractures--a retrospective study.

J Craniomaxillofac Surg 2014 Oct 15;42(7):1102-5. Epub 2014 Jan 15.

Department of Oral and Maxillofacial Surgery (Head: Prof. Rajasekhar Gaddipati), Mamata Dental College & Hospital, Giriprasad Nagar, Khammam, Andhra Pradesh 507002, India. Electronic address:

Background: Previous retrospective analyses prove that impacted mandibular third molars (M3s) increase the risk of angle fractures and decrease the risk of concomitant fractures to the condyle.

Study Design: A retrospective cohort was designed for patients reported to the Department of Oral and Maxillofacial Surgery from January 2011 till June 2013. The study variables are presence or absence of third molar, if it is present, their position, classified using the Pell and Gregory system; angulation, classified using Shiller's method. Read More

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October 2014

International surgical clerkship rotation: perceptions and academic performance.

Am J Surg 2013 Aug 26;206(2):280-6. Epub 2013 Feb 26.

Emory University School of Medicine, 1648 Pierce Dr NE, Atlanta, GA 30307, USA.

Background: Concerns about international training experiences in medical school curricula include the effect on student learning. We studied the educational effect of an international elective integrated into a traditional third-year (M3) surgical clerkship.

Methods: A 1-week surgical elective in Haiti was available to M3 students during the conventional 8-week surgical clerkship each year for the 4 academic years 2008 to 2011. Read More

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What has been the United Kingdom's experience with retention of third molars?

J Oral Maxillofac Surg 2012 Sep 3;70(9 Suppl 1):S48-57. Epub 2012 Jul 3.

Department of Oral Surgery, King's College London Dental Institute, London, United Kingdom.

Background: In 2000, the first National Institute of Clinical Excellence (NICE) guidelines related to third molar (M3) surgery, a commonly performed operation in the United Kingdom, were published. This followed research publications and professional guidelines in the 1990 s that advised against prophylactic surgery and provided specific therapeutic indications for M3 surgery. The aim of the present report was to summarize the available evidence on the effects of guidelines on M3 surgery within the United Kingdom. Read More

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September 2012

Impact of impacted mandibular third molars in mandibular angle and condylar fractures.

Int J Oral Maxillofac Surg 2010 Feb 18;39(2):136-9. Epub 2010 Jan 18.

Division of Oral and Maxillofacial Surgery, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu 608002, India.

Previous retrospective analyses prove that impacted mandibular third molars (M3s) increase the risk of angle fractures and decrease the risk of concomitant fractures to the condyle. The authors have attempted to verify these relationships and identify the underlying mechanism of injury. A retrospective cohort was designed for patients attending the Division of Oral and Maxillofacial Surgery from January 2001 till October 2008. Read More

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February 2010

Analysis of the alpha-1-antitrypsin deficient alleles M3S, MZ, and ZZ by biochemical and molecular methods: a family study.

Biochem Genet 2009 Feb 13;47(1-2):33-41. Epub 2008 Dec 13.

Department of Biochemistry, Faculty of Science, Süleyman Demirel University, Isparta, Turkey.

Deficiency of alpha-1-antitrypsin (alpha(1)-AT, a major protease inhibitor controlling tissue degradation) is a genetic disorder transmitted in a codominant autosomal form. It has more than 100 genetically determined variants. This study attempted to determine the degree of association between serum alpha(1)-AT levels and phenotypes and to provide a strategy for reliable laboratory evaluation of deficiencies. Read More

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February 2009

Interproximal wear facets and tooth associations in the Paşalar hominoid sample.

J Hum Evol 2008 Apr;54(4):480-93

Dil ve Tarih Cografya Enstitüsü, Palaoantropoloji, Ankara Universitesi, Sihhiye/Ankara, Turkey.

Interproximal wear facets were examined on hominoid teeth from the middle Miocene site at Paşalar, Turkey. The aim was to find matches between adjacent premolar and molar teeth from single individuals that were collected in the field as isolated teeth and use them to reconstruct tooth rows. These were then used to investigate: (1) the wear gradient on the molar teeth; (2) the dispersal of teeth from single mandibles and maxillae; (3) the size ratios among the molars; and (4) the number of individuals represented by the hominoid sample. Read More

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Safety assurance of assistive devices based on a two-level checking scheme.

Conf Proc IEEE Eng Med Biol Soc 2005;2005:6927-9

Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan, R.O.C.

The increasing number of physically challenged individuals has boosted the demand of powered wheelchairs. This paper is on the subject of a DSP (Digital Signal Processors) based assistive system, which is associated with a two-level checking scheme. The assistive system takes on the M3S (Multiple Master Multiple Slave) regulation for the assurance of safety. Read More

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October 2012

Dental morphometric variation between African and Asian colobines, with special reference to the other Old World monkeys.

Authors:
Ruliang Pan

J Morphol 2006 Sep;267(9):1087-98

School of Anatomical Sciences, University of Witwatersrand, Johannesburg, Parktown, Johannesburg 2193, South Africa.

In order to reveal differences between Asian and African colobines (nonhuman primates) in terms of dietary adaptation and evolutionary development, a large number of the species of the cercopithecoids (Old World monkeys) was analyzed with morphometric methods. In addition to the raw data and ratios, deviations of the colobines, predicted from allometric baselines derived from the cercopithecines, were analyzed by univariate and multivariate analyses. Some results indicated that there exists significant differentiation between colobines and cercopithecines; the latter exhibit a larger dental scale relative to body size, and the less developed front teeth of the colobines may be related to their fewer frequent incisal use, compared with those of the cercopithecines. Read More

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September 2006

The M3S-based electric wheelchair for the people with disabilities in Taiwan.

Disabil Rehabil 2005 Dec;27(24):1471-7

Department of Electronic Engineering, Hwa Hsia Institute of Technology, Taipei, Taiwan.

Purpose: This study aims to establish an electronic wheelchair system in Taiwan that conforms to multiple master-multiple slave (M3S) standards. The proposed system could enhance the safety and convenience of people with disabilities.

Material And Method: The M3S-based head-controlled electric wheelchair consists of three parts: (A) the input device, (B) the output device, and (C) the safety device. Read More

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December 2005

Panoramic radiographic findings as predictors of inferior alveolar nerve exposure following third molar extraction.

J Oral Maxillofac Surg 2005 Jan;63(1):3-7

Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Harvard School of Dental Medicine, Boston, MA 02114, USA.

Objectives: The aim of this study was to estimate the sensitivity and specificity of panoramic radiographic findings in relation to inferior alveolar nerve (IAN) exposure after mandibular third molar (M3) extraction.

Methods: The study used a retrospective cohort model. The primary predictor variable was the presence or absence of > or = 1 panoramic radiographic sign associated with an increased risk for IAN injury. Read More

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January 2005

Enamel thickness of deciduous and permanent molars in modern Homo sapiens.

Authors:
F E Grine

Am J Phys Anthropol 2005 Jan;126(1):14-31

Department of Anthropology, Stony Brook University, Stony Brook, New York 11794-4364, USA.

This study presents data on the enamel thickness of deciduous (dm2) and permanent (M1-M3) molars for a geographically diverse sample of modern humans. Measurements were recorded from sections through the mesial cusps of unworn teeth. Enamel is significantly thinner on deciduous than on permanent molars, and there is a distinct trend for enamel to increase in relative thickness from M1 to M3. Read More

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January 2005

Types, frequencies, and risk factors for complications after third molar extraction.

J Oral Maxillofac Surg 2003 Dec;61(12):1379-89

Department of Orthodontics, University of North Carolina, Chapel Hill, USA.

Objectives: The study objective was to identify the types, frequency, and risk factors for complications after third molar (M3) extractions.

Study Design: This retrospective cohort study consisted of patients who had 1 or more M3s removed between 1996 and 2001. Risk factors were grouped into demographic, general health, anatomic, and operative. Read More

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December 2003

M3S: the local network for electric wheelchairs and rehabilitation equipment.

Authors:
S Linnman

IEEE Trans Rehabil Eng 1996 Sep;4(3):188-92

Permobile Research and Development Laboratory, Akersberga, Sweden.

M3S is an open electric network standard for connecting rehabilitation equipment, especially electric modules in a wheelchair. It provides bidirectional communication at 250 kbaud via a CAN bus and extra safety lines for "Dead Man's Switch" and a TURN ON key. In an M3S system, the same input device may be used for controlling many different output devices in different operating modes. Read More

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September 1996

Expression of the entoconulid (sixth cusp) on mandibular molar teeth of an Australian aboriginal population.

Am J Phys Anthropol 1990 Jul;82(3):267-74

Department of Dentistry, University of Adelaide, South Australia.

The expression and genetic basis of the entoconulid (sixth cusp) on mandibular molars were examined in a geographically isolated group of aboriginals from Yuendumu in the Northern Territory of Australia. Four grades of trait expression, ranging from trace to small, medium, and large cusps, were defined on dental casts of 399 subjects. Frequencies of occurrence were among the highest reported in human populations. Read More

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Tooth size, spacing, and crowding in relation to eruption or impaction of third molars.

Authors:
C M Forsberg

Am J Orthod Dentofacial Orthop 1988 Jul;94(1):57-62

Department of Orthodontics, Karolinska Institutet, Huddinge, Sweden.

A study was conducted for the purpose of comparing mesiodistal tooth diameters, sum of tooth widths, and the degree of spacing or crowding in the dentitions of two groups of young adults. The subjects in the first group had complete dentitions including third molars (M3s). In the second group, all M3s had been extracted for failure to erupt. Read More

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Preliminary observations on the BK 8518 mandible from Baringo, Kenya.

Am J Phys Anthropol 1986 Jan;69(1):117-27

A newly discovered adult hominid mandible (BK 8518) from Baringo, Kenya, is described and assessed. The corpus, many of the tooth crowns, and most of the left ascending ramus are preserved. The teeth are heavily and asymmetrically worn. Read More

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January 1986
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