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https://www.readbyqxmd.com/read/28894668/mucosal-perfusion-preservation-by-a-novel-shapeable-tissue-expander-for-oral-reconstruction
#1
Daria Barwinska, John Garner, Darrell D Davidson, Todd G Cook, George J Eckert, Sunil S Tholpady, Keith L March, Kinam Park, Clark T Barco
BACKGROUND: There are few methods for expanding oral mucosa, and these often cause complications such as tissue necrosis and expander eruption. This study examines mucosal blood perfusion following insertion of a novel shapeable hydrogel tissue expander (HTE). The canine model used subgingival insertion of HTE following tooth extraction and alveolar bone reduction. The primary goal of this study was to gain understanding of epithelial perfusion and reparative responses of gingival mucosa during HTE expansion...
August 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28732054/types-of-devices-used-in-ridge-split-procedure-for-alveolar-bone-expansion-a-systematic-review
#2
Nayansi Jha, Eun Ha Choi, Nagendra Kumar Kaushik, Jae Jun Ryu
The aim of this systematic review was to evaluate instrumentation procedures of the alveolar ridge expansion technique (ARST) with or without Guided Bone Regeneration (GBR) and to identify the most used instruments for successful outcome. An electronic as well as manual literature search was conducted in several databases including Medline, Embase, and Cochrane Central Register of Controlled Trials, for articles written in English up to September 2016. The question in focus was to identify the type of device for ridge expansion that is most frequently used and provides adequate bone expansion and implant success rate...
2017: PloS One
https://www.readbyqxmd.com/read/28693325/transparent-silk-fibroin-microspheres-from-controlled-droplet-dissolution-in-a-binary-solution
#3
Fernando Jativa, Xuehua Zhang
Silk is a natural polymer with a broad range of potential applications in textiles, advanced materials, biomedical devices, and drug delivery. The ability to control the morphology and assembly of silk fibroin is essential for the fabrication of silk-based structured materials. Here, we report an effective and simple approach based on droplet dissolution for weaving silk fibroin into spheres of several hundred micrometers in diameter. The spheres possess regular wrinkled microstructures on the surface and switchable transparency for visible light...
July 27, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28663017/the-application-of-a-delayed-expansion-technique-for-horizontal-alveolar-ridge-augmentation-in-dental-implantation
#4
X Li, P Xu, X Xu, S Liu
The aim of this study was to evaluate the application of delayed expansion of the alveolar ridge in dental implantation. This method avoids the need to harvest autogenous bone and the requirement to fix a block with screws, and could help prevent the uncontrolled fracture and avascular necrosis that may result from the traditional alveolar split. Eighteen patients and 43 implants were included in this retrospective study. The width of the alveolar ridge was measured before implantation, immediately after implantation, and after the final restoration...
June 26, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28623685/two-stage-ridge-split-at-narrow-alveolar-mandibular-bone-ridges
#5
Ivo Agabiti, Daniele Botticelli
PURPOSE: When the bone ridge is corticalized, the displacement of the buccal plate may result in an unintentional malfracture. The aim of this study was to report the results of a 2-stage atrophic alveolar ridge expansion performed with a sonic-air surgical instrument. MATERIALS AND METHODS: In this retrospective cohort study, the atrophic distal segments of the mandible were treated by a split-thickness flap approach and application of an alveolar ridge expansion performed in 2 surgical phases...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28610819/simulation-of-three-surgical-techniques-combined-with-two-different-bone-borne-forces-for-surgically-assisted-rapid-palatal-expansion-of-the-maxillofacial-complex-a-finite-element-analysis
#6
S C Möhlhenrich, A Modabber, K Kniha, F Peters, T Steiner, F Hölzle, U Fritz, S Raith
Surgically assisted rapid palatal expansion (SARPE) is a common treatment to correct transverse maxillary deficiencies. Finite element analysis was simulated for six designs of SARPE based on a computed tomography scan of a human skull: median osteotomy with palatal (type A) or alveolar ridge (type B) bone-borne force, additional lateral osteotomy with palatal (type C) or alveolar ridge (type D) bone-borne force, and additional pterygomaxillary separation with palatal (type E) or alveolar ridge (type F) bone-borne force...
October 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28538061/clinical-experience-of-treatment-of-facial-malformations-in-oto-palato-digital-syndrome-a-familial-patient
#7
Tomoe Kira-Koizumi, Nobuyuki Mitsukawa, Tadashi Morishita, Shinsuke Akita, Yoshitaka Kubota, Kaneshige Satoh
Oto-palato-digital syndrome type 1 (OPD1) is an X-linked recessive disorder comprising characteristic facial appearances and skeletal alterations. The authors report OPD1 in a mother and her 2 sons who had multiple common congenital anomalies. Both of the brothers were born with mild hearing impairment, frontal bossing with prominent supraorbital ridges, downslanting palpebral fissures, dental malocclusion, and palatal clefts. They underwent a series of aesthetic surgeries for their facial malformations with good cosmetic results...
June 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28486048/endometriosis-origin-from-primordial-germ-cells
#8
Zograb Makiyan
Endometriosis is defined by the presence of endometrial ectopia. Multiple hypotheses have been postulated to explain the etiology of endometriosis to understand various clinical evidences. The etiology of endometriosis is still unclear.The primary question to understanding the etiology of endometrial ectopia (endometriosis) is determining the origin of eutopic (normally cited) endometrium.According to the new theory, primordial germ cells migrate from hypoblast (yolk sac close to the allantois) to the gonadal ridges...
May 9, 2017: Organogenesis
https://www.readbyqxmd.com/read/28292657/migration-of-latent-fingermarks-on-non-porous-surfaces-observation-technique-and-nanoscale-variations
#9
K T Popov, V G Sears, B J Jones
Latent fingermark morphology was examined over a period of approximately two months. Variation in topography was observed with atomic force microscopy and the expansion of the fingermark occurred in the form of the development of an intermediate area surrounding the main fingermark ridge. On an example area of a fingermark on silicon, the intermediate region exists as a uniform 4nm thick deposit; on day 1 after deposition this region extends approximately 2μm from the edge of the main ridge deposit and expands to a maximum of ∼4μm by day 23...
March 6, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28284751/wrinkles-on-sepals-cuticular-ridges-form-when-cuticle-production-outpaces-epidermal-cell-expansion
#10
David R Smyth
No abstract text is available yet for this article.
April 3, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28246596/alveolar-ridge-split-technique-using-piezosurgery-with-specially-designed-tips
#11
Alessandro Moro, Giulio Gasparini, Enrico Foresta, Gianmarco Saponaro, Marco Falchi, Lorenzo Cardarelli, Paolo De Angelis, Mario Forcione, Umberto Garagiola, Giuseppe D'Amato, Sandro Pelo
The treatment of patients with atrophic ridge who need prosthetic rehabilitation is a common problem in oral and maxillofacial surgery. Among the various techniques introduced for the expansion of alveolar ridges with a horizontal bone deficit is the alveolar ridge split technique. The aim of this article is to give a description of some new tips that have been specifically designed for the treatment of atrophic ridges with transversal bone deficit. A two-step piezosurgical split technique is also described, based on specific osteotomies of the vestibular cortex and the use of a mandibular ramus graft as interpositional graft...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28214438/stepwise-dynamics-of-an-anionic-micellar-film-formation-of-crown-lenses
#12
Jongju Lee, Alex Nikolov, Darsh Wasan
We studied the stepwise thinning of a microscopic circular foam film formed from an anionic micellar solution of sodium dodecyl sulfate (SDS). The foam film formed from the SDS micellar solution thins in a stepwise manner by the formation and expansion of a dark spot(s) of one layer less than the film thickness. During the last stages of film thinning (e.g., a film with one micellar layer), the dark spot expansion occurs via two steps. Initially, a small dark circular spot inside a film of several microns in size is formed, which expands at a constant rate...
June 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28208057/vertical-alveolar-distraction-osteogenesis-of-the-atrophic-posterior-mandible-before-dental-implant-insertion
#13
MULTICENTER STUDY
Adi Rachmiel, Dekel Shilo, Dror Aizenbud, Omri Emodi
PURPOSE: Augmentation of deficient mandibular posterior alveolar ridges poses a great challenge because of extensive bone deficiency and the presence of the inferior alveolar nerve. This study sets its focus on vertical alveolar distraction osteogenesis (ADO) at the posterior mandible before dental implant placement. MATERIALS AND METHODS: The study included 21 sites in 18 patients with severe mandibular posterior alveolar ridge deficiency. A trapezoidal osteotomy was performed, and an extraosseous alveolar distraction device was fixed and activated after a 4-day latency period at a rate of 0...
June 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28095517/radiographic-evaluation-of-crestal-bone-level-in-split-crest-and-immediate-implant-placement-minimum-5-year-follow-up
#14
Giovanni B Bruschi, Paolo Capparé, Fabrizio Bravi, Nicola Grande, Enrico Gherlone, Giorgio Gastaldi, Roberto Crespi
PURPOSE: This study aimed to evaluate the radiographic bone level changes of implants positioned via the split-crest procedure both in the maxilla and mandible at a long-term follow-up. MATERIALS AND METHODS: Seventy-one patients were retrospectively enrolled in the study. The placement of 137 dental implants was performed in the edentulous premolar or molar region after a split-crest ridge expansion procedure. Implants followed a delayed loading protocol. Intraoral digital radiographs were performed at baseline, upon implant placement, at 70 days (following placement of the provisional prosthesis), and on a yearly basis during followup...
January 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28048965/the-developing-stability-of-posterior-mandibular-implants-associated-with-bone-expansion-and-conventional-drilling-techniques
#15
Yen Ting Lin, Adrienne Hong, Ying Chin Peng, Hsiang Hsi Hong
Clinical decisions regarding the stability and osseointegration of mandibular implants positioned using the bone expansion techniques are conflicting and limited. The objective was to evaluate the stability of implants placed using two surgical techniques, selected according to the initial width of the mandibular posterior edentulous ridge, with D3 bone density, during a 12-week period. Fifty-eight implants in 33 patients were evaluated. Thirty-two implants in 24 patients were positioned using the osteotome expansion technique, and twenty-six fixtures in 17 patients were installed using the conventional drilling technique...
January 3, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/27790575/the-effect-of-ridge-expansion-on-implant-stability-in-narrow-partially-edentulous-ridges-a-preliminary-clinical-study
#16
Latheef Saheb Shaik, Sridhar Meka, Vivekanand Sabanna Kattimani, Srinivas Pandi Chakravarthi, Naga Neelima Devi Kolli, Krishna Prasad Lingamaneni, Susmita Avvaru, Rahul Tiwari
INTRODUCTION: Currently, dental treatments with better aesthetic results and less treatment time is more acceptable by the patients. Inadequate amount of bone for implant placement at functionally and aesthetically most appropriate position is a common problem. AIM: To assess the effect of ridge expansion on implant stability in narrow partially edentulous ridges and to evaluate clinically and radiographically the success of dental implants, placed immediately following ridge expansion procedure...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27755447/lateral-ridge-splitting-expansion-with-immediate-placement-of-endosseous-dental-implant-using-piezoelectric-device-a-new-treatment-protocol
#17
Firas A Jamil, Sahar Shakir Al-Adili
Many treatment modalities have been introduced for correction of deficient alveolar ridge width. Bone expansion through the ridge split procedure is one of them. This technique was initiated in order to overcome many problems that usually associated with grafting procedures. The present study evaluated the effectiveness of piezoelectric device in performing ridge split using single-stage approach and assessed the outcomes during a period of about 4 months after surgery. A total of 23 patients aged in range between 18 and 60 years underwent ridge split procedure with immediate insertion of dental implants...
March 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27740654/extraction-socket-management-with-buccal-plate-expansion-preliminary-results-of-a-novel-technique
#18
Alberto Fernandez Ayora, Oscar González-Martín, Eric Rompen, Geoffrey Lecloux, France Lambert
The primary objective of this pilot study was to evaluate a new socket preservation technique involving the intentional expansion of the extraction socket buccal plate using a flapless internal corticotomy and biomaterials. A total of 11 patients requiring tooth extraction were enrolled in this study. The aim of this technique was to maintain or improve the hard and soft tissue contour of the ridge after tooth extraction. All surgical sites healed uneventfully. Significant alveolar bone dimension changes were observed in the coronal region of the ridge (-1...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27732624/mitochondrial-dna-analyses-indicate-high-diversity-expansive-population-growth-and-high-genetic-connectivity-of-vent-copepods-dirivultidae-across-different-oceans
#19
Sabine Gollner, Heiko Stuckas, Terue C Kihara, Stefan Laurent, Sahar Kodami, Pedro Martinez Arbizu
Communities in spatially fragmented deep-sea hydrothermal vents rich in polymetallic sulfides could soon face major disturbance events due to deep-sea mineral mining, such that unraveling patterns of gene flow between hydrothermal vent populations will be an important step in the development of conservation policies. Indeed, the time required by deep-sea populations to recover following habitat perturbations depends both on the direction of gene flow and the number of migrants available for re-colonization after disturbance...
2016: PloS One
https://www.readbyqxmd.com/read/27614891/review-cornification-morphogenesis-and-evolution-of-feathers
#20
REVIEW
Lorenzo Alibardi
Feathers are corneous microramifications of variable complexity derived from the morphogenesis of barb ridges. Histological and ultrastructural analyses on developing and regenerating feathers clarify the three-dimensional organization of cells in barb ridges. Feather cells derive from folds of the embryonic epithelium of feather germs from which barb/barbule cells and supportive cells organize in a branching structure. The following degeneration of supportive cells allows the separation of barbule cells which are made of corneous beta-proteins and of lower amounts of intermediate filament (IF)(alpha) keratins, histidine-rich proteins, and corneous proteins of the epidermal differentiation complex...
May 2017: Protoplasma
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