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Evaluation of the influence of mandibular condylar contour, height, and asymmetry in subjects with myalgia presenting with or without clicking among south coastal Karnataka population - A descriptive cross-sectional study.

J Indian Prosthodont Soc 2021 Jan-Mar;21(1):81-87

Department of Prosthodontics and Crown and Bridge, Nitte (Deemed to be University), AB Shetty Memorial Institute of Dental Sciences, Mangalore, Karnataka, India.

Aim: The purpose was to evaluate the morphological variations of the condyle in patients presenting with myalgia associated with and without clicking of temporomandibular joint (TMJ) and its possible effect on the contour and height.

Setting And Design: Cross sectional study.

Material And Methods: A total of 60 patients comprising of 20 patients with myalgia, 20 patients with myalgia associated with clicking of TMJ, and a control group of 20 patients without any signs and symptoms of temporomandibular disorder were selected for purpose of the study. Read More

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[Three-dimensional morphological changes in the temporomandibular joints of patients with anterior disc displacement with reduction].

Hua Xi Kou Qiang Yi Xue Za Zhi 2021 Apr;39(2):203-208

Key Laboratory for Biomechanical Engineering of Sichuan Province, Sichuan University, Chengdu 610065, China.

Objectives: To investigate the differences in the temporomandibular joints (TMJs) between patients with anterior disc displacement with reduction (ADDwR) and asymptomatic subjects by using 3D morphometric measurements.

Methods: A total of 15 patients with ADDwR and 10 asymptomatic subjects were enrolled. Then, 3D models of the maxilla and mandible were reconstructed using MIMICS 20. Read More

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Comparative Numerical Analysis between Two Types of Orthodontic Wire for the Lingual Technique, Using the Finite Element Method.

Appl Bionics Biomech 2021 25;2021:6658039. Epub 2021 Mar 25.

Instituto Politécnico Nacional, Escuela Superior de Ingeniería Mecánica y Eléctrica, Sección de Estudios de Posgrado e Investigación, Unidad Profesional Adolfo López Mateos "Zacatenco", Avenida Instituto Politécnico Nacional s/n, Edificio 5, 2do. Piso, Col. Lindavista, C.P. 07320 Ciudad de México, Mexico.

In the lingual orthodontic technique, there are two paradigms regarding the type of wire used. Regardless of the material or gauge, some orthodontists choose to use the straight wire and resin and bond it to the surface of the tooth; they call it compensations. Other orthodontists prefer to bend the wire, giving it a mushroom shape. Read More

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An experimental intraradicular biofilm model in the pig for evaluating irrigation techniques.

BMC Oral Health 2021 Apr 7;21(1):177. Epub 2021 Apr 7.

Division of Operative Dentistry, Department of Ecological Dentistry, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aobaku, Sendai, Miyagi, 980-8575, Japan.

Background: We established an in vivo intraradicular biofilm model of apical periodontitis in pigs in which we compared the efficacy of different irrigant activation techniques for biofilm removal.

Methods: Twenty roots from the deciduous mandibular second premolar of 5 male pigs were used. After pulpectomy, canals were left open for 2 weeks and then sealed for 4 weeks to enable the development of an intracanal biofilm. Read More

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Atypical presentation of lateral periodontal cyst associated with impacted teeth: two case reports.

BMC Oral Health 2021 Apr 7;21(1):178. Epub 2021 Apr 7.

Oral Medicine and Maxillofacial Pathology Unit, Division of Oral and Maxillofacial Surgery, Department of Surgery, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, 1205, Geneva, Switzerland.

Background: Lateral periodontal cyst (LPC) is an uncommon form of developmental odontogenic cyst. LPC can be suspected when there is a round, well-circumscribed radiolucency, usually of small diameter, along the lateral surface of vital erupted teeth, predominantly in the mandibular premolar region. Histopathological analysis allows LPC to be diagnosed based on its characteristic features such as a thin cuboidal to stratified squamous non-keratinizing epithelium containing epithelial plaques and glycogen-rich clear cells. Read More

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Comparison of tooth movement and biological response resulting from different force magnitudes combined with osteoperforation in rabbits.

J Appl Oral Sci 2021 2;29:e20200734. Epub 2021 Apr 2.

Zhejiang University School of Medicine, Sir Run Run Shaw Hospital, Department of Dentistry, Center of Orthodontics, Hangzhou, China.

Objective: To compare tooth movement rate and histological responses with three different force magnitude designs under osteoperforation in rabbit models.

Methodology: 48 rabbits were divided into three groups: Group A, Group B, and Group C, with traction force of 50 g, 100 g, 150 g, respectively. Osteoperforation was performed at the mesial of the right mandibular first premolar, the left side was not affected. Read More

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Temporomandibular Joint Osseous Morphology of Class I and Class II Malocclusions in the Normal Skeletal Pattern: A Cone-Beam Computed Tomography Study.

Diagnostics (Basel) 2021 Mar 18;11(3). Epub 2021 Mar 18.

Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.

(1) Background-The aim of the present study was to evaluate the correlation between the temporomandibular joint (TMJ) osseous morphology of normal skeletal pattern individuals with different dental malocclusions by using cone-beam computed tomography (CBCT). (2) Methods-The CBCT images of bilateral TMJs in 67 subjects with skeletal class I and average mandibular angle (26 males and 41 females, age range 20-49 years) were evaluated in this study. The subjects were divided into class I, class II division 1, and class II division 2 according to the molar relationship and retroclination of the maxillary incisors. Read More

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Evaluation of masticatory function in patients with cleft lip and/or palate.

Eur J Oral Sci 2021 Mar 30:e12781. Epub 2021 Mar 30.

Orthodontic Division, Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy.

The aim of this study was to evaluate the masticatory pattern in children with cleft lip and/or palate (CL/P) through investigation of the prevalence of reverse sequencing chewing cycles. The study group included 18 patients with CL/P (mean age: 7.4 yr, SD: 1. Read More

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[Evaluations of the morphology and position of condyle and fossa of adolescent temporomandibular joint with Class Ⅱsubdivision malocclusions].

Shanghai Kou Qiang Yi Xue 2020 Dec;29(6):656-660

Department 1 of Orthodontics, Affiliated Stomatological Hospital of Soochow University, Suzhou Stomatological Hospital. Suzhou 215008, Jiangsu Province, China.

Purpose: To evaluate the morphology and position of condyle and fossa and joint space of adolescent temporomandibular joint with Class Ⅱ subdivision malocclusion, in order to provide a reference for diagnosis before treatment.

Methods: The study sample consisted of 30 adolescent patients with Class Ⅱ subdivision malocclusions(9 males, 21 females, mean age 12.5 years) as the experimental group and 30 adolescent patients with Class Ⅰ malocclusions (11 males, 19 females, mean age 12 years) as the control group treated from June 2018 to December 2019 in Suzhou Stomatological Hospital. Read More

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December 2020

Trueness and precision of artificial teeth in CAD-CAM milled complete dentures with custom disks.

J Prosthet Dent 2021 Mar 24. Epub 2021 Mar 24.

Professor, Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.

Statement Of Problem: Insufficient information is available regarding the trueness and precision of artificial teeth in computer-aided design and computer-aided manufacturing (CAD-CAM) milled complete dentures fabricated from custom disks, including prefabricated teeth.

Purpose: The purpose of this in vitro study was to determine the trueness and precision of the position of the artificial teeth arranged in CAD-CAM milled complete dentures manufactured by using a custom disk method and to compare the trueness and precision of different tooth types and the occlusal surface and entire surface of the teeth.

Material And Methods: The milling data were designed by using a CAD software program. Read More

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Comparison of postoperative morbidity between piezoelectric surgery and conventional rotary instruments in mandibular third molar surgery: a split-mouth clinical study.

Med Oral Patol Oral Cir Bucal 2021 Mar 27. Epub 2021 Mar 27.

Pamukkale University Faculty of Dentistry Department of Periodontology Kınıklı Campus 20160 Denizli, Turkey

Background: The extraction of impacted third molar teeth is a common procedure in maxillofacial surgery. The aim of this study was to compare of piezoelectric surgical technique with the one with conventional rotary instruments in terms of edema, trismus and pain, in mandibular third molar surgery.

Material And Methods: 20 individuals with symmetrically impacted lower mandibular third molars and 40 teeth were included in the study. Read More

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Finite element analysis of endocrown and post-core abutments for removable partial dentures with different framework materials.

Int J Prosthodont 2021 Mar 27. Epub 2021 Mar 27.

Purpose: To evaluate the stress distribution in endocrowns and post-and-core crowns used as abutments for a Kennedy Class I removable partial denture constructed with different framework materials.

Materials And Methods: 3D models of a Kennedy Class I mandible were constructed. Cobalt-chromium (Co-Cr) and polyether ether ketone (PEEK) frameworks were simulated for Models 1 and 2. Read More

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Delayed diagnosis of cranial neuropathies from perineural spread of skin cancer.

Taiwan J Ophthalmol 2021 Jan-Mar;11(1):86-88. Epub 2020 Nov 19.

Department of Ophthalmology, Emory University School of Medicine, Atlanta, Georgia, USA.

Perineural spread (PNS) to cranial nerves (CNs) by cutaneous malignancies is difficult to diagnose given the indolent course and often late or absent findings on brain imaging. A 68-year-old white man with multiple cranial neuropathies secondary to PNS by squamous cell carcinoma had negative high-quality neuroimaging for 5.25 years. Read More

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November 2020

Clear Cell Odontogenic Carcinoma of the Mandible Harboring Rearrangement: Report of a Massive Jaw Tumor and Review of Diagnostic Considerations.

Case Rep Dent 2021 9;2021:5558019. Epub 2021 Mar 9.

Department of Diagnostic Sciences, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.

Clear cell odontogenic carcinoma (CCOC) is a low-grade malignant neoplasm that affects the jaws. We report an 18 cm massive case of mandibular CCOC in a 43-year-old female. The tumor was composed of nests and cords of round to polygonal monomorphic clear cells separated by prominent stromal hyalinization. Read More

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Radiotherapy of extraosseous nasopharyngeal chordoma: A case report and literature review.

Authors:
Chi-Yuan Yeh

Mol Clin Oncol 2021 Apr 26;14(4):84. Epub 2021 Feb 26.

Department of Radiation Oncology, Tungs' Taichung Metroharbor Hospital, Taichung 43503, Taiwan, R.O.C.

Chordomas are slow-growing aggressive tumors that account for 1-4% of all bone tumors. The anatomical distribution of chordomas includes 50-60% in the sacrococcygeal region, 25-30% in the skull base and 15% in the mobile spine. Virchow was the first to describe and term these tumors as 'ecchordosis physaliphora' in 1857, and Muller established their notochordal origin in 1895. Read More

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Effectiveness of functional orthodontic appliances in obstructive sleep apnea treatment in children: literature review.

Braz J Otorhinolaryngol 2021 Mar 14. Epub 2021 Mar 14.

Universidade Federal de São Paulo (Unifesp), Departamento de Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, São Paulo, SP, Brazil.

Introduction: Obstructive sleep apnea syndrome is a common condition in childhood and if left untreated can result in many health problems. An accurate diagnosis of the etiology is crucial for obstructive sleep apnea treatment success. Functional orthodontic appliances that stimulate mandibular growth by forward mandibular positioning are an alternative therapeutic option in growing patients. Read More

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Two species of Talitridae (Crustacea, Amphipoda) from Kenya.

Zootaxa 2021 Feb 15;4927(3):zootaxa.4927.3.2. Epub 2021 Feb 15.

Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China National Museums of Kenya, Museum Hill, P.O. Box 40658-00100, Nairobi, Kenya University of Chinese Academy of Sciences, Beijing 100049, China.

Two species of the family Talitridae Rafinesque, 1815 are described from English Point Beach, Mkomani, Mombasa, Kenya. One new species Floresorchestia mkomani Bichang'a Hou, sp. nov. Read More

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February 2021

A new species of Sparsorythus Sroka amp; Soldán, 2008 (Ephemeroptera: Tricorythidae) from Eastern Ghats of Southern India.

Zootaxa 2021 Jan 21;4915(2):zootaxa.4915.2.3. Epub 2021 Jan 21.

PG Research department of Zoology, The American College, Madurai-625002, India.

A new mayfly species, Sparsorythus sivaramakrishnani sp. nov. from the stream of Pullian cholai, Thuraiyur, Namakkal district, Tamil Nadu, India is described based on male and female nymphs. Read More

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January 2021

Evaluation of anatomic variations of mandibular lingual concavities from cone beam computed tomography scans in a Malaysian population.

J Prosthet Dent 2021 Mar 19. Epub 2021 Mar 19.

Private practice, Mangalore, India.

Statement Of Problem: Lingual plate perforation can be life-threatening when vital structures are damaged during implant placement. Knowledge of the anatomy of lingual concavities is imperative for safe implant surgery.

Purpose: The purpose of this clinical study was to determine the prevalence of type of posterior mandibular ridge morphology in a Malaysian population and to evaluate the buccolingual width of the alveolar ridge (Wb and Wc); alveolar ridge height (Vcb); and concavity angle, length, and depth for both left and right first and second molars in different age groups and sexes by using cone beam computed tomography (CBCT). Read More

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Sialocoele associated with the molar salivary gland in a British Shorthair cat.

JFMS Open Rep 2021 Jan-Jun;7(1):2055116921990307. Epub 2021 Feb 23.

Soft Tissue Surgery, Willows Veterinary Centre and Referral Service, Solihull, UK.

Case Summary: A 16-year-old neutered female British Shorthair cat presented with a 5-year history of swelling lateral to the left mandible that intermittently discharged viscous, clear fluid from a small defect in the skin. CT, ultrasonography, physical characteristics and cytology of the fluid were suggestive of sialocoele. CT showed a large, cavitary, fluid-filled mass lateral to the left mandible. Read More

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February 2021

A Cross-Sectional Study on Ultrasonographic Measurements of Parotid Glands in Type 2 Diabetes Mellitus.

Int J Dent 2021 2;2021:5583412. Epub 2021 Mar 2.

Department of Medicine, Bangalore Medical College and Research Institute, Bangalore 560001, India.

Background: Diabetes mellitus is a metabolic disease which is seen increasing globally and is diagnosed and monitored on basis of invasive blood investigations. Salivary glands are affected in diabetes mellitus. The objective of this study was to assess ultrasonographic measurements of parotid glands and correlate with the glycosylated hemoglobin levels in type 2 diabetic mellitus and duration of type 2 diabetic mellitus and treatment regimens. Read More

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A case report of surgical resection of secretory carcinoma in the maxillary and ethmoid sinus.

Int J Surg Case Rep 2021 Mar 13;81:105750. Epub 2021 Mar 13.

Department of Surgery, Division of Otolaryngology Head & Neck Surgery, Dalhousie University, Halifax, Nova Scotia, Canada. Electronic address:

Introduction: Secretory Carcinoma is a recently discovered head and neck tumour. Surgical resection is generally the first line of treatment with neck dissection, radiation, and chemotherapy decided based on clinical, radiological, and histological parameters. We present a case of a Secretory Carcinoma presenting in the maxillary and ethmoid sinuses. Read More

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Nodular Pseudogout of the Skull Base Arising From the Temporomandibular Joint.

J Craniofac Surg 2021 Mar 17. Epub 2021 Mar 17.

Department of Plastic and Reconstructive Surgery, Saitama Medical Center, Jichi Medical University Department of Plastic and Reconstructive Surgery, Jichi Medical University Department of Neurosurgery, Saitama Medical Center, Jichi Medical University, Tochigi 329-0498, Japan.

Abstract: The authors report a case of a rare, large, nodular pseudogout which developed from the temporomandibular joint (TMJ).An 83-year-old female was referred to the hospital with swelling on her left cheek. Imaging studies revealed a large calcified mass surrounding the left mandibular condyle, partially destroying the adjoining bone and extending to the skull base. Read More

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Quantitative Morphometric Analysis of Anatomical Landmarks Involved in Bilateral Sagittal Split Osteotomy in Different Skeletal Malocclusions Using Cone-Beam Computed Tomography.

J Craniofac Surg 2021 Mar 17. Epub 2021 Mar 17.

Department of Maxillofacial Surgery, School of Dentistry, Guilan University of Medical Sciences Dental Sciences Research Center, Department of Maxillofacial Radiology, School of Dentistry Guilan University of Medical Sciences Research and Technology, Guilan University of Medical Sciences, Rasht, Iran.

Background: To assess and compare the anatomical landmarks involved in bilateral sagittal split osteotomy (BSSO) in different skeletal malocclusions quantitatively using cone-beam computed tomography (CBCT).

Methods: This retrospective study evaluated 63 CBCT scans of the three malocclusion classes (n = 21). Twenty-one quantitative variables were measured and compared between different malocclusion classes. Read More

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Endoscopic-assisted microvascular decompression for trigeminal neuralgia secondary to vertebrobasilar dolichoectasia: A case report.

Int J Surg Case Rep 2021 Mar 11;81:105749. Epub 2021 Mar 11.

Department of Neurosurgery I, Viet Duc University Hospital, Hanoi, Viet Nam. Electronic address:

Introduction And Importance: Trigeminal neuralgia (TN) secondary to vertebrobasilar dolichoectasia (VBD) was a rare condition. This paper reported a successful endoscopic-assisted microvascular decompression (MVD) for TN secondary to VBD.

Case Presentation: A 53-year-old male with a history of myocardial infarction and heart failure complained of left refractory facial pain three years prior to admission. Read More

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Biomechanical evaluation of a customized 3D-printed polyetheretherketone condylar prosthesis.

Exp Ther Med 2021 Apr 11;21(4):348. Epub 2021 Feb 11.

Department of Oral and Maxillofacial Surgery, School of Stomatology, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China.

The present study aimed to evaluate the biomechanical behavior of a custom 3D-printed polyetheretherketone (PEEK) condylar prosthesis using finite element analysis and mechanical testing. The Mimics software was used to create a 3D model of the mandible, which was then imported into Geomagic Studio software to perform osteotomy of the lesion area. A customized PEEK condyle prosthesis was then designed and the finite element model of the PEEK condyle prosthesis, mandible and fixation screw was established. Read More

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Smart Mandibular Advancement Device for Intraoral Monitoring of Cardiorespiratory Parameters and Sleeping Postures.

IEEE Trans Biomed Circuits Syst 2021 Mar 12;PP. Epub 2021 Mar 12.

Obstructive sleep apnea (OSA), as a highly prevalent sleep disorder, causes several serious health complaints. It has been proved that using intraoral mandibular advancement devices (MADs) during sleep is an efficient treatment for OSA. However, due to limited number of sleep study laboratories, effectiveness of MAD therapy is not regularly monitored. Read More

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Actinomycotic Osteomyelitis of the Mandible - A Rare Case Report.

Ann Maxillofac Surg 2020 Jul-Dec;10(2):525-528. Epub 2020 Jun 23.

Department of Oral and Maxillofacial Surgery, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Medical Sciences (Deemed to be University), Wardha, Maharashtra, India.

Actinomycetes are a relatively sporadic cause of infection of the head-and-neck region and their appearance is usually uncharacteristic, and hence pose a challenge for the diagnosis. The present article intends to exhibit this rarity afflicting mandible and highlight its management. The present report describes a case of a 55-year-old countryside female who presented with pain and swelling affecting the left side of the mandible. Read More

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The optimal orthodontic displacement of clear aligner for mild, moderate and severe periodontal conditions: an in vitro study in a periodontally compromised individual using the finite element model.

Authors:
Yanning Ma Song Li

BMC Oral Health 2021 Mar 10;21(1):109. Epub 2021 Mar 10.

Department of Orthodontics, School of Stomatology, Capital Medical University, No. 4, Tian Tan Xi Li, Beijing, 100050, China.

Background: Pathologic tooth migration (PTM) is a common complication of mild to severe periodontitis and proper orthodontic treatment is helpful to alleviate periodontal diseases. The goal of this study is to explore an optimal orthodontic displacement of clear aligner using a three-dimensional (3D) finite element model (FEM).

Methods: The cone beam computed tomography (CBCT) data of a patient received invisible orthodontics without diabetes and other systemic diseases were collected. Read More

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Hemifacial Microsomia Caused by First and Second Brachial Arch Syndrome Treated with Orthodontic Approach: A Case Report.

J Contemp Dent Pract 2020 Oct 1;21(10):1189-1195. Epub 2020 Oct 1.

Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan, Phone: +81-88-6337356, e-mail:

Aim And Objective: To present a growing patient with unilateral mandibular hypoplasia and microtia involved in the first and second branchial arch syndrome (FSBAS) treated with functional appliance.

Background: The FSBAS comprises several developmental facial hypoplasia in ear and maxillofacial bones, resulting in hemifacial microsomia. Treatment for hemifacial microsomia varies greatly depending on the grade of mandibular deformities. Read More

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October 2020