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https://www.readbyqxmd.com/read/28944375/influence-of-different-calcium-phosphates-on-an-experimental-adhesive-resin
#1
Isadora Martini Garcia, Vicente Castelo Branco Leitune, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
PURPOSE: To formulate adhesive resins with 2 wt% of hydroxyapatite (HAp), α-tricalcium phosphate (α-TCP), or octacalcium phosphate (OCP) and to compare these groups with an unfilled adhesive regarding the degree of conversion, polymerization rate, microshear bond strength and mineral deposition. MATERIALS AND METHODS: The experimental adhesive resin was formulated mixing 66.6 wt% bisphenol A glycol dimethacrylate (bis-GMA), 33.3 wt% 2-hydroxyethyl methacrylate (HEMA), and a photoinitiator system...
September 21, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28944361/cone-beam-computed-tomography-with-ultra-low-dose-protocols-for-pre-implant-radiographic-assessment-an-in-vitro-study
#2
Robert Liljeholm, Nils Kadesjö, Daniel Benchimol, Kristina Hellén-Halme, Xie-Qi Shi
PURPOSE: To evaluate the ultra-low dose scanning protocols of a newly developed CBCT for pre-implant radiographic assessment. MATERIALS AND METHODS: A total number of 32 CBCT scans were exposed at 90 kV using ProMax 3D's standard (GS) and three ultra-low dose scanning protocols: high, mid and low definition (UL-HD, UL-MD and UL-LD) on eight human dry skulls with simulated soft tissue. The mAs values and the voxel size were 96mAs/200 µm, 28mAs/150 µm, 22.4mAs/200 µm and 7...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/28944360/immediate-loading-of-fixed-prostheses-in-fully-edentulous-jaws-1-year-follow-up-from-a-single-cohort-retrospective-study
#3
Francesco Giordano, Marco Esposito
PURPOSE: To evaluate the clinical outcome of four to five implants immediately restored with metal-resin screw-retained cross-arch fixed prostheses in edentulous jaws 1 year after loading. MATERIALS AND METHODS: In total, 104 consecutive patients received four 11 × 4.5 mm implants with a torque superior to 35 Ncm. If one implant did not reach a torque superior to 35 Ncm a fifth implant was added. If two implants did not reach a torque superior to 35 Ncm, loading was postponed after 3 months...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/28944356/two-or-three-machined-vs-roughened-surface-dental-implants-loaded-immediately-supporting-total-fixed-prostheses-1-year-results-from-a-randomised-controlled-trial
#4
Gioacchino Cannizzaro, Giorgio Gastaldi, Enrico Gherlone, Raffaele Vinci, Ignazio Loi, Anna Trullenque-Eriksson, Marco Esposito
PURPOSE: To compare implants with machined vs roughened surfaces placed flapless in totally edentulous jaws and immediately restored with metal-resin screw-retained cross-arch prostheses. Mandibles were rehabilitated with two implants (Fixed-on-2 or Fo2) and maxillae with three implants (Fixed-on-3 or Fo3). MATERIALS AND METHODS: Forty edentulous or to be rendered edentulous patients (20 in the mandible and 20 in the maxilla) were randomised to the machined group (20 patients: 10 mandibles and 10 maxillae) and to the roughened group (20 patients: 10 mandibles and 10 maxillae) according to a parallel group design...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/28944354/single-vs-two-implant-retained-overdentures-for-edentulous-mandibles-a-systematic-review
#5
Ahmed Yaseen Alqutaibi, Marco Esposito, Radwan Algabri, Adnan Alfahad, Amal Kaddah, Mohammed Farouk, Ali Alsourori
PURPOSE: To compare prosthesis and implant failure, patient satisfaction, prosthetic complications and peri-implant marginal bone loss of mandibular overdentures (IOD) supported by a single or two implants. MATERIALS AND METHODS: Manual and electronic database (PubMed and Cochrane) searches were performed to identify randomised controlled trials, without language restriction, comparing single vs two implant supported mandibular overdentures. Two investigators extracted data independently...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/28943223/-the-mouth-of-patients-with-acromegaly
#6
Christine Cortet-Rudelli
Orofacial changes are frequent in acromegaly. Their evolution is slowly progressive. The lips (everted and thickened), the mandibular morphology (prognathism), the tongue (macroglossia), the soft palate and the uvula (increased and thickened), the parodontis (gingival hyperplasia, paradontitis), the teeth (increased interdental spaces, hypercementosis, increased dental mobility, multiple tooth loss) are concerned. Functional consequences are significant (obstructive sleep apnea syndrome, malocclusion, pain of the oral maxillofacial area, decrease of the quality of life)...
September 21, 2017: La Presse Médicale
https://www.readbyqxmd.com/read/28943183/quantitative-ultrasound-of-the-mandible-as-a-novel-screening-approach-for-osteoporosis
#7
Anna Beattie, Seán Cournane, Ciarán Finucane, J Bernard Walsh, Leo F A Stassen
This study used an axial transmission quantitative ultrasound (QUS) device to assess mandibular bone strength. The aim of the study was first to establish the precision and repeatability of the axial transmission QUS measurement for a range of mandibular anatomic sites, and second to investigate the ability of the modality to differentiate between osteoporotic subjects and a control group. Three groups of adult Caucasian women were recruited: (1) healthy premenopausal women (n = 26), (2) healthy postmenopausal women (n = 48), and (3) women with osteoporosis (n = 53)...
September 21, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28943181/clinical-study-of-splint-therapeutic-efficacy-for-the-relief-of-temporomandibular-joint-discomfort
#8
Yoko Hasegawa, Naoya Kakimoto, Seiki Tomita, Masanori Fujiwara, Reichi Ishikura, Hiromitsu Kishimoto, Kosuke Honda
PURPOSE: This study aimed to evaluate the relationship between displacement of the mandibular condyle/disc due to occlusal splint insertion with splint therapy and changes in discomfort of the temporomandibular joint (TMJ), and to clarify the relationships between the outcomes over time of temporomandibular discomfort and TMJ magnetic resonance imaging (MRI) findings at the initiation of splint therapy. MATERIALS AND METHODS: A total of 75 patients admitted to hospital with discomfort around the TMJ were evaluated...
August 24, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28943180/cad-cam-plates-versus-conventional-fixation-plates-for-primary-mandibular-reconstruction-a-biomechanical-in%C3%A2-vitro-analysis
#9
Carsten Rendenbach, Kay Sellenschloh, Lucca Gerbig, Michael M Morlock, Benedicta Beck-Broichsitter, Ralf Smeets, Max Heiland, Gerd Huber, Henning Hanken
BACKGROUND: CAD/CAM reconstruction plates have become a viable option for mandible reconstruction. The aim of this study was to determine whether CAD/CAM plates provide higher fatigue strength compared with conventional fixation systems. MATERIAL AND METHODS: 1.0 mm miniplates, 2.0 mm conventional locking plates (DePuy Synthes, Umkirch, Germany), and 2.0 mm CAD/CAM plates (Materialise, Leuven, Belgium/DePuy Synthes) were used to reconstruct a polyurethane mandible model (Synbone, Malans, CH) with cortical and cancellous bone equivalents...
September 1, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28942310/dental-and-temporomandibular-joint-pathology-of-the-north-american-brown-bear-ursus-arctos-horribilis-ursus-arctos-middendorffi-and-ursus-arctos-sitkensis
#10
J N Winer, B Arzi, S Döring, P H Kass, F J M Verstraete
Museum specimens (maxillae and mandibles) from 393 North American brown bears (Ursus arctos) from Alaska were examined macroscopically according to predefined criteria and 204 specimens were included in this study. The specimens were acquired between 1905 and 2012. There were 99 specimens (48.5%) from male animals, 87 (42.7%) from female animals and 18 (8.8%) from animals of unknown sex. The ages of the animals ranged from neonate to adult, with 92 adults (45.1%) and 112 young adults (54.9%) included and neonates/juveniles excluded from the study...
August 2017: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/28941510/issues-in-pediatric-craniofacial-trauma
#11
REVIEW
Srinivasa R Chandra, Karen S Zemplenyi
Pediatric maxillofacial fractures are rare owing to anatomic differences between juvenile and adult skulls. Children's bone is less calcified, allowing for "greenstick fractures." The overall ratio of cranial to facial volume decreases with age. In children, tooth buds comprise the majority of mandibular volume. The most common pediatric craniomaxillofacial fractures for children ages 0 to 18 years old are mandible, nasal bone, and maxilla and zygoma. Growth potential must be considered when addressing pediatric trauma and often a less-is-more approach is best when considering open versus closed treatment...
November 2017: Facial Plastic Surgery Clinics of North America
https://www.readbyqxmd.com/read/28941509/current-management-of-subcondylar-fractures-of-the-mandible-including-endoscopic-repair
#12
REVIEW
Alexis M Strohl, Robert M Kellman
Treatment of subcondylar fractures has been the subject of debate for many years. Options for treatment include physical therapy, elastic maxillomandibular fixation, and open repair. Proper imaging and clinical evaluation are imperative when deciding on the best management option. In the past, most subcondylar fractures were treated with a closed approach. Recent data support open repair, when feasible. Studies show increased interincisal opening, lateral excursion, and protrusion with less mandibular shortening, jaw deviation, and pain...
November 2017: Facial Plastic Surgery Clinics of North America
https://www.readbyqxmd.com/read/28941508/updates-in-management-of-craniomaxillofacial-gunshot-wounds-and-reconstruction-of-the-mandible
#13
REVIEW
Baber Khatib, Savannah Gelesko, Melissa Amundson, Allen Cheng, Ashish Patel, Tuan Bui, Eric J Dierks, R Bryan Bell
This article includes updates in the management of mandibular trauma and reconstruction as they relate to maxillomandibular fixation screws, custom hardware, virtual surgical planning, and protocols for use of computer-aided surgery and navigation when managing composite defects from gunshot injuries to the face.
November 2017: Facial Plastic Surgery Clinics of North America
https://www.readbyqxmd.com/read/28941376/is-the-three-dimensional-strut-plate-an-adequate-fixation-technique-for-mandibular-symphysis-fractures
#14
Andrew T Meram, Sergio Olate, Celso F Palmieri
PURPOSE: We present a series of cases of mandibular symphysis fractures treated at our institution with a 3-dimensional strut plate. The aim of the present study was to confirm the stability of this fixation technique and discuss its advantages, disadvantages, and potential complications. PATIENTS AND METHODS: We designed and implemented a retrospective cohort study of patients who underwent surgery by the same surgeon at our institution from July 2012 to April 2014 for a mandible fracture with a symphysis component...
September 1, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28941281/in-vitro-fracture-strength-and-patterns-in-root-filled-teeth-restored-with-different-base-materials
#15
Theo Chan, Selen Küçükkaya Eren, Rebecca Wong, Peter Parashos
BACKGROUND: There is little research on the effects of an intermediate base on the fracture strength of root filled teeth. This study compared the fracture strengths and patterns of root filled teeth restored with intermediate bases of GIC, ZPC, DCRC and Biodentine(®) under resin composite. METHODS: Standardised cavities were prepared in 100 extracted human maxillary and mandibular premolars, and root canal treatment was performed. The teeth were stratified and randomly allocated to five groups (n = 20): 1...
September 23, 2017: Australian Dental Journal
https://www.readbyqxmd.com/read/28941152/cost-minimization-analysis-of-a-long-term-randomized-clinical-trial-of-patients-treated-with-immediately-loaded-implant-supported-fixed-prosthesis
#16
Sara A Alfadda, Jill E Furzer
PURPOSE: To document the long-term costs from a randomized controlled clinical trial (RCT) on edentulous patients treated with mandibular 4-implant-supported fixed prosthesis and two loading protocols. METHODS: Taking the perspective of the individual patient, costs associated with treatment, complications, and patients' time from 18 patients who received an immediate-loading protocol and 21 patients treated with a conventional loading protocol were compared over 10 years of observation...
September 21, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28940891/untouched-canal-areas-and-debris-accumulation-after-root-canal-preparation-with-rotary-and-adaptive-systems
#17
Rosa Maria Vianna Lopes, Fernanda Cunha Marins, Felipe Gonçalves Belladonna, Erick Miranda Souza, Gustavo De-Deus, Ricardo Tadeu Lopes, Emmanuel João Nogueira Leal Silva
This study assessed the percentage of untouched canal areas and the amount of debris accumulation after canal preparation with ProTaper Next (PTN) and Twisted File Adaptive (TFA) systems using micro-computed tomographic (micro-CT) imaging. Twenty isthmus-containing mesial roots of mandibular molars were anatomically matched through micro-CT evaluation and randomly assigned to one of the two experimental groups (n = 10), according to the system used for canal preparation: PTN (X1 and X2 files using rotary motion) and TFA (SM1 and SM2 files using adaptive motion)...
September 20, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28940680/correlation-between-direction-and-severity-of-temporomandibular-joint-disc-displacement-and-reduction-ability-during-mouth-opening
#18
Monika Litko, Marcin Berger, Jacek Szkutnik, Ingrid Różyło-Kalinowska
BACKGROUND: The most common temporomandibular joint (TMJ) internal derangement is an abnormal relationship of the disc with respect to the mandibular condyle, articular eminence, and glenoid fossa - disc displacement. OBJECTIVE: The aim of our study is to analyse the correlation between partial/complete disc displacement in the intercuspal position (IP) and its reduction in the open mouth position (OMP) in both oblique-sagittal and coronal plane on magnetic resonance imaging (MRI) in patients with temporomandibular disorders...
September 23, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28940563/influence-of-different-sized-files-on-the-accuracy-of-two-electronic-apex-locators
#19
Fernando A Orosco, Guilherme F da Silva, Paulo H Weckwerth, Maria Thereza M Lopes, Alan M R Garcia, Marco Antônio H Duarte, Ivaldo G de Moraes
The aim of this study was to evaluate the impact of different file sizes on the accuracy of two electronic apex locators (EALs). Thirty extracted human single-rooted permanent mandibular incisors were used. A #10 K-file was inserted in the root canal until its end could be observed (using a light microscope) through the apical foramen. One millimetre was subtracted to establish working length (WL). Electronic readings were performed using MiniApex Locator or Root ZX II, from #10 K-file to #130 K-file. Statistical analysis was performed by two-way anova and Tukey test (P ≤ 0...
September 20, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28939844/upper-airway-asymmetry-in-skeletal-class-iii-malocclusions-with-mandibular-deviation
#20
De-Hua Zheng, Xu-Xia Wang, Dan Ma, Yuan Zhou, Jun Zhang
The purpose of this study was to investigate the relationship between bilateral differences of upper airway and mandibular morphologic patterns in subjects with skeletal Class III mandibular deviation. 47 skeletal Class III (ANB < 0°) adult patients with and without mandibular deviation were divided into 2 groups. Bilateral differences of minimum cross-sectional area, mean cross-sectional area, volume of subdivisions (nasopharynx, palatopharynx, glossopharynx, hypopharynx) were assessed paired t test...
September 22, 2017: Scientific Reports
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