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Denise F Blake, Melissa Crowe, Daniel Lindsay, Annie Brouff, Simon J Mitchell, Neal W Pollock
INTRODUCTION: High concentration normobaric oxygen (O₂) is a priority in treating divers with suspected decompression illness. The effect of different O₂ mask configurations on tissue oxygenation when breathing with a demand valve was evaluated. METHODS: Sixteen divers had tissue oxygen partial pressure (PtcO₂) measured at six limb sites. Participants breathed O₂ from a demand valve using: an intraoral mask (IOM®) with and without a nose clip (NC), a pocket face mask and an oronasal mask...
December 24, 2018: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
Chang Heon Hwang, Myung Chul Lee
BACKGROUND: Esthetic reduction malarplasty is popular in East Asia, where a small and balanced facial profile is considered a desirable characteristic. Various surgical techniques have been applied; however, several complications can impact the bony structure and final esthetic appearance. We examined the outcomes of revision malarplasty with regard to strategic assessments to achieve facial balance and skeletal stability. METHODS: This retrospective study reviewed 97 patients who underwent revision malarplasty between December 2014 and November 2016...
November 13, 2018: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
John Zaki, Marwa Alnawawy, Nermin Yussif, Ahmed Elkhadem
BACKGROUND: Autogenous intraoral block grafting is the gold standard augmentation technique for moderate-to-severe horizontal ridge deficiency. However, the graft undergoes variable resorption during healing that might jeopardize the outcome of the procedure. Several studies hypothesized that covering the graft with a membrane decreases the amount of graft resorption, but this effect is not established in the literature. OBJECTIVE: The objective of this study is to assess the clinical value of covering intraoral block grafts with membranes in horizontal ridge augmentation regarding graft resorption (primary outcome), graft success, net bone gain, and complications (secondary outcomes)...
December 2018: Journal of Evidence-based Dental Practice
Alexis Goujat, Hazem Abouelleil, Pierre Colon, Christophe Jeannin, Nelly Pradelle, Dominique Seux, Brigitte Grosgogeat
STATEMENT OF PROBLEM: Different parameters can influence the adaptation of computer-assisted design and computer-assisted manufacturing (CAD-CAM) inlay/onlay restorations. However, systematic reviews to identify and discuss these parameters are lacking. PURPOSE: The purpose of this systematic review was to summarize the scientific literature investigating all parameters that can influence both the marginal and internal adaptation of CAD-CAM inlay/onlay restorations...
December 1, 2018: Journal of Prosthetic Dentistry
Huan Liu, Shizhu Bai, Xiaonan Yu, Yimin Zhao
For a patient with a unilateral orbital defect, an esthetic orbital prosthesis plays an essential role in enhancing quality of life. This technique describes the combined use of a facial scanner and an intraoral scanner to acquire the digital scan for the design and fabrication of an orbital prosthesis. The method results in an esthetic prosthesis with accurate skin texture reproduction.
November 30, 2018: Journal of Prosthetic Dentistry
Simona Portaro, Antonino Naro, Claudio Guarneri, Giuseppe Di Toro, Alfredo Manuli, Rocco Salvatore Calabrò
RATIONALE: Myotonic dystrophy type 1 (DM1) is an autosomal dominant disease caused by a cytosine, guanine, thymine (CTG) trinucleotide repeat expansion in the non-coding region of dystrophia myotonica protein kinase gene, causing a multisystem involvement. To date, few studies have been performed to evaluate skin features in DM1 patients, but none reported on the possible association between the disease and tongue hemangiomas. PATIENTS CONCERNS: We report a case of a 63-year-old woman affected by DM1 and presenting, at the intraoral examination, several swelling and buish lesions occurring on buccal and palatal mucosa, and in the anterior two-thirds and margins of the tongue...
November 2018: Medicine (Baltimore)
Parvathi Ravula, Srikanth Rangachari, Rammurti Susarla, Laxman Sambari, Srinivas Saraswathi Jammula
Background: High flow arteriovenous malformation (AVM) of the mandible is rare, but it can present as a life-threatening emergency with severe intraoral bleeding for the first time. The gold standard of treatment for an AVM of the mandible is selective embolisation combined with resection and subsequent reconstructions. With the advent of advanced multidisciplinary techniques aimed at definitive therapy, surgical resection and primary reconstruction can provide an ideal anatomical and functional cure...
May 2018: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
Nawakamon Suriyan, Lertrit Sarinnaphakorn, George R Deeb, Sompop Bencharit
STATEMENT OF PROBLEM: Conventional guided implant surgery promises clinical success through implant placement accuracy; however, it requires multiple drills along with surgical sleeves and sleeve adapters for the horizontal and vertical control of osteotomy drills. This results in cumbersome surgery, problems with patients having limited mouth opening, and restriction to specific drill or implant manufacturers. A protocol for using trephination drills to simplify guided surgery and accommodate multiple implant systems is introduced...
November 30, 2018: Journal of Prosthetic Dentistry
Valentina Lancellotta, Stefano Pagano, Luca Tagliaferri, Marco Piergentini, Alessandro Ricci, Sandro Montecchiani, Simonetta Saldi, Sara Chierchini, Stefano Cianetti, Vincenzo Valentini, György Kovács, Cynthia Aristei
This clinical report describes the use of a 3-dimensional (3D) printer to create an individual mold for delivering high-dose-rate interventional radiotherapy for hard palate cancer. The maxillary teeth and palate were scanned with an intraoral scanner (3Shape Trios 3). The scan was transformed into a mesh using the standard tessellation language (STL) format and aligned with Digital Imaging and Communications in Medicine (DICOM) computed tomography (CT) images using free Blue Sky Plan 4 planning software. A mold was generated by tracing a guideline around the gingival margins of the maxillary teeth and palate on the scan mesh in accordance with established parameters...
November 30, 2018: Journal of Prosthetic Dentistry
Rafał Obuchowicz, Karolina Nurzynska, Barbara Obuchowicz, Andrzej Urbanik, Adam Piórkowski
OBJECTIVES: Dental caries are caused by tooth demineralization due to bacterial plaque formation. However, the resulting lesions are often discrete and thus barely recognizable in intraoral radiography images. Therefore, more advanced detection techniques are in great demand among dentists and radiographers. This study was performed to evaluate the performance of texture feature maps in the recognition of discrete demineralization related to caries plaque formation. METHODS: Digital intraoral radiology image analysis protocols incorporating first-order features (FOF), co-occurrence matrices, gray tone difference matrices, run-length matrices (RLM), local binary patterns (LBP), and k-means clustering (CLU) were used to transform the digital intraoral radiology images of 10 patients with confirmed caries, which were retrospectively reviewed in a dental clinic...
November 9, 2018: Oral Radiology
Hayriye Cetmili, Melek Tassoker, Sevgi Sener
OBJECTIVE: The aim of the study was to compare intraoral radiographs and CBCT images for detection of horizontal periodontal bone loss, and to investigate the diagnostic effect of different voxel resolutions in CBCT imaging. METHODS: A total of 240 sites with horizontal bone loss were measured on the buccal, lingual, mesial, and distal surfaces of 60 posterior teeth in four maxillary and six mandibular bones obtained from cadavers (dry skulls). Direct measurements on the dry skulls were accepted as the gold standard values...
June 8, 2018: Oral Radiology
Eun-Jung Kwak, Nan-Ju Lee, Wonse Park, Kee-Deog Kim
Ultrasonography has recently been applied to the field of oral and maxillofacial surgery because of its noninvasiveness and ease of use. However, traditional transducers are not used in the intraoral area because of their large size. A novel intraoral transducer was introduced with size, volume, and axis modifications. This new transducer allows the surgeon to approach the intraoral region during dental procedures. This report describes a case of successful removal of a foreign body using the newly developed intraoral ultrasound probe...
January 15, 2018: Oral Radiology
Bruna Corrêa Massahud, João César Guimarães Henriques, Reinhilde Jacobs, Rafaela Rangel Rosa, Caio Vinícius Bardi Matai
OBJECTIVES: Secondary hyperparathyroidism (SHPT) is a disease that affects patients with chronic kidney disease, and is characterized by mineral disturbance and bone loss, known as renal osteodystrophy. The aim of this study was to assess the validity of using intraoral phosphor storage plates to take radiographs of the middle phalanges to evaluate bone loss resulting from SHPT during follow-up of these patients. METHODS: The sample consisted of 24 patients with chronic kidney disease, 12 with parathyroid hormone (PTH) levels ≥500 pg/ml, and 12 with PTH levels <500 pg/ml, who underwent hemodialysis weekly...
May 2018: Oral Radiology
Parth Mewar, Karen E González-Torres, T Matthew Jacks, Robert D Foss
An 11 month old Caucasian male presented with swelling of the right side of the nose and buccal vestibule of unknown duration. Radiographic images revealed a well-circumscribed, hypodense soft tissue mass with a peripheral hyperdense circumference involving the anterior aspect of the right maxilla. The lesion extended from the inferior aspect of the orbital rim superiorly to the maxillary bone inferiorly without invading any nearby structures. The lesion was completely resected via combined extraoral and intraoral approach...
November 27, 2018: Head and Neck Pathology
Wenjian Zhang, Shazia Rajani, Bing-Yan Wang
OBJECTIVES: Cone-beam computed tomography (CBCT) has been widely used in many fields of dentistry. However, little is known about the accuracy of CBCT for evaluation of periodontal status. The objective of this study was to compare and correlate periodontal assessments among CBCT, clinical attachment loss (CAL) measurement, and periapical (PA)/bitewing (BW) radiography. METHODS: Eighty patients (28 males, 52 females; age range, 19-84 years) from the University of Texas School of Dentistry at Houston were evaluated retrospectively...
September 2018: Oral Radiology
Georgiy A Polev, Ricardo L Carrau, Denis A Golbin, Klementina S Avdeeva, Nickolai S Grachev, Igor N Vorozhtsov, Nikolay V Lasunin, Vasily A Cherekaev, Juan Eugenio Salas Galicia
Ligation of the sphenopalatine and posterior nasal arteries is indicated for posterior epistaxis as initial treatment or when conservative measures fail. In some patients, a transnasal approach or its alternative transantral approach are not possible due to tumor filling the nasal corridor, pterygopalatine fossa, or maxillary sinus. Aim of this study was to evaluate feasibility of endoscopically assisted transoral approach for the ligation of the maxillary artery (MA). Six fresh cadaver specimens (12 sides), previously prepared with intravascular injections of colored latex, were dissected...
November 22, 2018: Journal of Craniofacial Surgery
Sean S Lee, So Ran Kwon, Marilyn Ward, Wendy Jenkins, Sonia Souza, Yiming Li
OBJECTIVES: To assess two professional tooth bleaching products: Philips Zoom WhiteSpeed (PZW) and Ultradent Opalescence Boost PF (UOB); and to assess bleaching maintenance after use of Philips Sonicare power toothbrush (SDC) or manual toothbrush (MTB). METHODS: There was a randomized, parallel clinical trial. Eligible subjects were 18-75 years, with VITA Classical shade (VCS) of A3 on anterior teeth. Subjects were randomized to bleaching with PZW or UOB. Tooth color and shade were assessed using VITA EasyShade (VES), VCS, and VITA Bleachedguide (VBG)...
November 26, 2018: Journal of Esthetic and Restorative Dentistry
Simon Graf, Sivabalan Vasudavan, Benedict Wilmes
The objective of this article was to illustrate the digital process in the custom fabrication of metallic mini-implant supported appliances. An implant-supported appliance was produced for a patient using a CAD-CAM procedure without a physical impression or a printed model. The work flow consisted of mini-implant insertion into the palate, recording an intraoral digital scan, digital design with incorporation of a scanned expansion mechanism, direct 3-dimensional metal printing via laser melting, laser welding of the hyrax mechanism, insertion, and activation of the appliance...
December 2018: American Journal of Orthodontics and Dentofacial Orthopedics
Soram Oh, Sehoon Kim, Ha Seon Lo, Joo-Young Choi, Hyun-Jung Kim, Gil-Joo Ryu, Sun-Young Kim, Kyoung-Kyu Choi, Duck-Su Kim, Ji-Hyun Jang
This case report describes an innovative virtual simulation method using a computer-aided rapid prototyping (CARP) model and a computer-aided design (CAD) program for autotransplantation of an immature third molar.A compromised left mandibular second molar (#18) was extracted and replaced by autotransplantation using an immature left mandibular third molar (#17). In order to minimize the surgical time and injury to the donor tooth, a virtual 3-dimensional (3D) rehearsal surgery was planned. Cone-beam computed tomographic images were taken to fabricate the 3D printing CARP model of the donor tooth and tentative extraction socket...
December 2018: Journal of Endodontics
Luigi Canullo, Andrea Di Domenico, Fabio Marinotti, Maria Menini, Paolo Pesce
PURPOSE: Transferring precise information to the dental laboratory is one of the key factors to achieving clinical success. The aim of the present study was to describe classical and digital work-flows used to rehabilitate an implant with a convergent collar in the aesthetic zone following the BOPT (biologically oriented preparation technique) approach and to report the three years follow-up outcomes of two patients rehabilitated following such procedures. MATERIALS AND METHODS: Two central incisors of two different patients were rehabilitated with a tissue-level implant with a convergent collar and, after a provisional and healing phase, one implant was "impressed" using a classical workflow and one using a digital one...
November 23, 2018: International Journal of Environmental Research and Public Health
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