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Sinus augmentation

Lasse Skibsbye, Thomas Jespersen, Torsten Christ, Mary M Maleckar, Jonas van den Brink, Pasi Tavi, Jussi T Koivumäki
BACKGROUND: Refractoriness of cardiac cells limits maximum frequency of electrical activity and protects the heart from tonic contractions. Short refractory periods support major arrhythmogenic substrates and augmentation of refractoriness is therefore seen as a main mechanism of antiarrhythmic drugs. Cardiomyocyte excitability depends on availability of sodium channels, which involves both time- and voltage-dependent recovery from inactivation. This study therefore aims to characterise how sodium channel inactivation affects refractoriness in human atria...
October 20, 2016: Journal of Molecular and Cellular Cardiology
Ramiro Chavez-Montoya, Osvaldo Araujo-Ramírez, Irma Yolanda Castillo-López, Luis Humberto Govea-Camacho
BACKGROUND: Silent sinus or imploding antrum syndrome is a very rare condition, consisting of a usually asymptomatic spontaneous collapse of the sinus walls and floor of the orbit. It is associated with negative pressures, and when this occurs, it presents with manifestations such as enophthalmos, hypoglobus, and tilt flow orbital floor. As its incidence is very low, it is frequently missed as a diagnosis, and in fact there are currently fewer than 150 cases reported in the literature...
October 20, 2016: Cirugia y Cirujanos
Delfo D'Alessandro, Giuseppe Perale, Mario Milazzo, Stefania Moscato, Cesare Stefanini, Gianni Pertici, Serena Danti
The ideal scaffold for bone regeneration is required to be highly porous, non-immunogenic, biostable until the new tissue formation, bioresorbable and osteoconductive. This study aimed at investigating the process of new bone formation in patients treated with granular SmartBone(®) for sinus augmentation, providing an extensive histologic analysis. Five biopsies were collected at 4-9 months post SmartBone(®) implantation and processed for histochemistry and immunohistochemistry. Histomorphometric analysis was performed...
October 18, 2016: International Journal of Pharmaceutics
Sebastian Stefanski, Börje Svensson, Andreas Thor
PURPOSE: Various augmentation procedures involving the maxillary sinus, using bone substitutes or bone, have been used to enhance bone support for dental implants. The aim of this study was to retrospectively evaluate the status of implants in patients who had undergone a maxillary sinus lift and immediate implant placement without the addition of graft material. MATERIALS AND METHODS: Nineteen patients who had required bone augmentation of their maxillary sinus floor were evaluated in this study...
October 20, 2016: Clinical Oral Implants Research
Abib Agbetoba, Amber Luong, Jin Keat Siow, Brent Senior, Claudio Callejas, Kornel Szczygielski, Martin J Citardi
BACKGROUND: Endoscopic sinus surgery represents a cornerstone in the professional development of otorhinolaryngology trainees. Mastery of these surgical skills requires an understanding of paranasal sinus and skull-base anatomy. The frontal sinus is associated with a wide range of variation and complex anatomical configuration, and thus represents an important challenge for all trainees performing endoscopic sinus surgery. METHODS: Forty-five otorhinolaryngology trainees and 20 medical school students from 5 academic institutions were enrolled and randomized into 1 of 2 groups...
October 18, 2016: International Forum of Allergy & Rhinology
Takahiro Kaneko, Satoshi Nakamura, Shunsuke Hino, Norio Horie, Tetsuo Shimoyama
BACKGROUND: Sinus lift is a bone augmentation procedure that improves the alveolar crest height in an atrophic posterior maxilla. However, the regenerated bone volume can vary and generally has a tendency to decrease after sinus operation. This article describes nongrafted maxillary sinus lift using a bioresorbable unsintered hydroxyapatite combined with poly L-lactide (HA/PLLA) mesh plate device and dental implant placement in an atrophic posterior maxilla, after which continuous bone gain was observed around the implant apex during a postoperative follow-up period of 3 years...
December 2016: Int J Implant Dent
Tsuneji Okada, Toru Kanai, Noriko Tachikawa, Motohiro Munakata, Shohei Kasugai
BACKGROUND: The long-term stability of maxillary sinus floor augmentation with β-TCP remains largely unknown. We report the long-term assessment of volumetric changes in maxillary sinus floor augmentation with β-TCP by cone-beam computed tomography (CBCT). METHODS: The subjects included 30 patients who underwent maxillary sinus floor augmentation using β-TCP and 58 implant placement for unilateral maxillary defect, simultaneously. Volumetric changes in β-TCP and the height of peri-implant bone were analyzed by CBCT...
December 2016: Int J Implant Dent
Daisuke Ueno, Takashi Kurokawa, Katsuichiro Maruo, Tsuneaki Watanabe, Jayanetti Asiri Jayawardena
INTRODUCTION: Perforation of the Schneiderian membrane is the most common complication in sinus floor augmentation (SFA). When volume of grafting is qualified to prevent enlargement of the membrane perforation, lack of bone volume may occur in optimal site. CASE PRESENTATION: SFA was performed in sites #24 to 26 in a 63-year-old male. However, a 10-mm size perforation of the Schneiderian membrane occurred in site #26. Although the sinus cavity was grafted with deproteinized bovine bone mineral (DBBM) after repair of membrane perforation, insufficient bone formation was observed on palatal and distal aspects of site #26 at 5 months after SFA...
December 2015: Int J Implant Dent
Rakshith Hegde, Krishna Prasad, Kaiwan Khurshed Shroff
Implants have a predictable outcome and are the foremost treatment modality for prosthetic rehabilitation of edentulous patients. Due to loss of bone after extraction and pneumatization of maxillary sinus, there is insufficient bone volume for implant placement. The direct maxillary sinus lift procedure has been performed with different grafting materials (autogenous bone grafts, alloplasts, allografts, and xenografts) and without grafting material, having new bone formation around the implant. There is no evidence to prove the need for grafting material in all direct sinus lift procedures, hence the need for this review...
October 2016: Journal of Indian Prosthodontic Society
Marco Antonio Alarcón, Karla Tatiana Diaz, Luisiana Aranda, Emilio Alfredo Cafferata, Clovis Mariano Faggion, Alberto Monje
PURPOSE: The use of biologic agents is emerging in bone regeneration procedures due to their ability to increase cellular events in wound healing and therefore to obtain more predictable outcomes. Hence, the aim of the present study was to critically evaluate the methodology of systematic reviews investigating biologic agents in promoting bone formation and implant site development. MATERIALS AND METHODS: A literature search for systematic reviews with and without meta-analyses was performed in Medline, Embase, and the Cochrane database, as well as in journals with high impact factors in periodontics and implant dentistry...
October 14, 2016: International Journal of Oral & Maxillofacial Implants
Jorge Soliz, Rose Tam, Richard Kinkead
Perinatal exposure to adverse experiences disrupts brain development, including the brainstem network that regulates breathing. At adulthood, rats previously subjected to stress (in the form of neonatal maternal separation; NMS) display features reported in patients suffering from sleep disordered breathing, including an increased hypoxic ventilatory response and hypertension. This effect is also sex-specific (males only). Based on these observations, we hypothesized that NMS augments the carotid body's O2-chemosensitivity...
2016: Frontiers in Physiology
T L M R Dos Anjos, R S de Molon, P R F Paim, E Marcantonio, E Marcantonio, R S Faeda
The aim of this study was to compare implant stability after maxillary sinus floor augmentation using small- or large-sized particles of Bio-Oss. Ten partially edentulous patients requiring bilateral maxillary sinus floor augmentation were enrolled. The subjects were assigned randomly to one of two experimental groups: maxillary sinus was filled with 0.25-1mm particle size (small particles) and the contralateral side was filled with 1-2mm particle size (large particles). After 8 months, a total of 25 implants were placed in the two maxillary sinuses...
September 27, 2016: International Journal of Oral and Maxillofacial Surgery
Jamil Alayan, Cedryck Vaquette, Siamak Saifzadeh, Dietmar Hutmacher, Saso Ivanovski
OBJECTIVE: To assess the impact of a hydrophilic implant surface (SLActive(®) ) placed into augmented maxillary sinuses on bone-to-implant contact (BIC) and surrounding tissue composition when compared to a hydrophobic surface (SLA(®) ). MATERIAL AND METHODS: Four sheep underwent bilateral sinus augmentation. Each sinus received anorganic bovine bone mineral + autogenous bone (ABBM + AB). Sixteen implants were subsequently placed 12 weeks postgrafting with each sinus receiving a control (SLA(®) ) and test implant (SLActive(®) )...
September 29, 2016: Clinical Oral Implants Research
Damir Jelusic, Matthias L Zirk, Tim Fienitz, Darije Plancak, Ivan Puhar, Daniel Rothamel
OBJECTIVES: To compare a monophasic (100% ß-TCP) and a biphasic (60% HA and 40% ß-TCP) bone substitute material (BSM) regarding biocompatibility, osteoconductivity and implant stability using histological, radiological and resonance frequency analysis. MATERIAL AND METHODS: Sixty-seven sinus floor elevations were performed in 60 patients. One patient group (monophasic bone substitute [MBS], 30 patients, 32 sinuses) was augmented by the use of the monophasic material (Bioresorb(®) , Sybron Implant Solutions, Bremen, Germany), while the second group (biphasic bone substitute (BBS), 30 patients, 35 sinuses) received a biphasic material (Maxresorb(®) , Botiss Biomaterials, Berlin, Germany)...
September 29, 2016: Clinical Oral Implants Research
Fang Wang, Qiong Li, Zuolin Wang
BACKGROUND: To compare the effects of Bio-Oss in combination with concentrated growth factors (CGFs) and bone marrow-derived mesenchymal stem cells (BMSCs) on bone regeneration for maxillary sinus floor augmentation in beagle dogs. METHODS: Six beagle dogs received bilateral maxillary sinus floor augmentation. Venous blood drawn from dogs was collected and centrifugated to obtain CGFs. BMSCs derived from canine bone marrow was cultured using density gradient centrifugation...
September 28, 2016: Journal of Oral Pathology & Medicine
Alberto Maria Saibene, Carlotta Pipolo, Alberto Maccari, Paolo Lozza, Matteo Chiapasco, Alberto Scotti, Roberto Borloni, Giovanni Felisati
INTRODUCTION: Sinonasal anatomical anomalies and inflammatory conditions may reduce success rates of maxillary sinus elevation (MSE) procedures used to allow implant placement in the atrophic posterior maxilla. Approaches combining endoscopic sinus surgery (ESS) and MSE were firstly proposed by our group and have already been described in the literature. This article aims to re-evaluate the procedure in a larger sample of patients comparing results and indications with the pertaining literature...
October 2016: Implant Dentistry
Ryan R Kroll, J Gordon Boyd, David M Maslove
BACKGROUND: As the sensing capabilities of wearable devices improve, there is increasing interest in their application in medical settings. Capabilities such as heart rate monitoring may be useful in hospitalized patients as a means of enhancing routine monitoring or as part of an early warning system to detect clinical deterioration. OBJECTIVE: To evaluate the accuracy of heart rate monitoring by a personal fitness tracker (PFT) among hospital inpatients. METHODS: We conducted a prospective observational study of 50 stable patients in the intensive care unit who each completed 24 hours of heart rate monitoring using a wrist-worn PFT...
2016: Journal of Medical Internet Research
Agurne Uribarri, Eneritz Bilbao, Xabier Marichalar-Mendia, Rafael Martínez-Conde, José M Aguirre, Fernando Verdugo
BACKGROUND: Susceptible individuals may be more prone to bone loss after augmentation procedures. PURPOSE: Identify plausible clinical and biological factors influencing apical and marginal bone remodeling at implants placed in augmented sinuses, in patients with and without history of periodontitis. MATERIALS AND METHODS: This prospective cross-sectional clinical study analyzed implant bone levels in a group of 104 patients with and without history of periodontitis undergoing 139 sinus augmentation procedures...
September 15, 2016: Clinical Implant Dentistry and related Research
Francesco Pieri, Ernesto Caselli, Caterina Forlivesi, Giuseppe Corinaldesi
PURPOSE: To retrospectively compare short implants (6 to 8 mm) (short group) to standard-length implants (≥ 11 mm) inserted in combination with a lateral sinus elevation procedure (sinus group), supporting partial fixed prostheses in the atrophic posterior maxilla. MATERIALS AND METHODS: Records of 118 patients treated with fluoride-modified implants in the atrophic posterior maxilla between January 2009 and December 2011 were screened in two private practices...
September 2016: International Journal of Oral & Maxillofacial Implants
Shaimaa Nasr, Dagmar E Slot, Samah Bahaa, Christof E Dörfer, Karim M Fawzy El-Sayed
PURPOSE: The aim of the present study was to systematically assess the current evidence on the effect of nongrafted compared to graft-assisted maxillary sinus floor elevation on implant survival/failure, endosinus bone gain, crestal bone loss, and bone density around dental implants. MATERIALS AND METHODS: MEDLINE-PubMed, Cochrane-CENTRAL, and EMBASE databases were searched up to November 2015 for randomized controlled trials (RCTs) and controlled clinical trials-(CCTs), evaluating dental implants placed in combination with maxillary sinus elevation without and with bone grafting...
July 2, 2016: Journal of Cranio-maxillo-facial Surgery
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