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Dental implant

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https://www.readbyqxmd.com/read/29053657/histological-differences-in-the-adherence-of-connective-tissue-to-laser-treated-abutments-and-standard-abutments-for-dental-implants-an-experimental-pilot-study-in-humans
#1
M Blázquez-Hinarejos, R Ayuso-Montero, J-M Álvarez-López, M-C Manzanares-Céspedes, J López-López
BACKGROUND: The goal of the current study is to assess the difference in connective tissue adherence to laser microtextured versus machined titanium abutments. MATERIAL AND METHODS: Six patients were selected and each of them received 2 implants, one combined with a laser treated abutment and one with a machined abutment. After three months, the abutments were retrieved together with their surrounding gingival tissue for histological analysis. Qualitative and quantitative evaluation of microscopical images was performed to assess the presence or absence of adherence between the soft tissues and the abutment, and the percentage of soft tissue adhered to the two different surfaces...
October 20, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29053645/comparison-of-peri-implant-bone-loss-between-conventional-drilling-with-irrigation-versus-low-speed-drilling-without-irrigation
#2
H Pellicer-Chover, D Peñarrocha-Oltra, A Aloy-Prosper, J- Sanchis-Gonzalez, M A Peñarrocha-Diago, M Peñarrocha-Diago
BACKGROUND: To compare the technique of high speed drilling with irrigation and low speed drilling without irrigation in order to evaluate the success rate and peri-implant bone loss at 12 months of follow-up. MATERIAL AND METHODS: A randomized, controlled, parallel-group clinical trial was carried out in patients requiring dental implants to rehabilitate their unitary edentulism. Patients were recruited from the Oral Surgery Unit of the University of Valencia (Spain) between September 2014 and August 2015...
October 20, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29050958/metal-artefact-reduction-for-accurate-tumour-delineation-in-radiotherapy
#3
David Gergely Kovacs, Laura A Rechner, Ane L Appelt, Anne K Berthelsen, Junia C Costa, Jeppe Friborg, Gitte F Persson, Jens Peter Bangsgaard, Lena Specht, Marianne C Aznar
BACKGROUND AND PURPOSE: Two techniques for metal artefact reduction for computed tomography were studied in order to identify their impact on tumour delineation in radiotherapy. MATERIALS AND METHODS: Using specially designed phantoms containing metal implants (dental, spine and hip) as well as patient images, we investigated the impact of two methods for metal artefact reduction on (A) the size and severity of metal artefacts and the accuracy of Hounsfield Unit (HU) representation, (B) the visual impact of metal artefacts on image quality and (C) delineation accuracy...
October 16, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29049951/the-mechanics-of-dental-occlusion-and-disclusion
#4
Thomas R Katona, George J Eckert
BACKGROUND: The mechanical environment associated with occluding teeth is the foundation for a wide range of research topics, clinical practice and dogma, product development and marketing, and medico-legal issues. The purpose of this study was to experimentally examine the relationships between occlusal factors and their impact on the associated contact forces. METHODS: Matching pairs of 0°, 20°, 33° and 40° cusp first molar denture teeth were placed into Class I, II and III molar relationships...
October 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29049874/balancing-bacteria-osteoblasts-competition-through-selective-physical-puncture-and-biofunctionalization-of-zno-polydopamine-arginine-glycine-aspartic-acid-cysteine-nanorods
#5
Jun Li, Lei Tan, Xiangmei Liu, Zhenduo Cui, Xianjin Yang, Kelvin Wai Kwok Yeung, Paul K Chu, Shuilin Wu
Bacterial infection and lack of bone tissue integration are two major concerns of orthopedic implants. In addition, osteoinductivity often decreases and toxicity may arise when antibacterial agents are introduced to increase the antibacterial ability. Here hybrid ZnO/polydopamine (PDA)/arginine-glycine-aspartic acid-cysteine (RGDC) nanorod (NR) arrays are designed and prepared on titanium (Ti) implants to not only enhance the osteoinductivity but also effectively kill bacteria simultaneously, which are ascribed to the selective physical puncture and the biofunctionalization of ZnO/PDA/RGDC nanorods during the competition between bacteria and osteoblasts, that is, owing to the much larger size of osteoblasts than bacteria, the hybrid NRs can puncture bacteria but not damage osteoblasts...
October 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/29045800/survival-and-complications-of-single-dental-implants-in-the-edentulous-mandible-following-immediate-or-delayed-loading-a-randomized-controlled-clinical-trial
#6
M Kern, W Att, E Fritzer, S Kappel, R G Luthardt, T Mundt, D R Reissmann, M Rädel, M Stiesch, S Wolfart, N Passia
It was the aim of this 24-mo randomized controlled clinical trial to investigate whether the survival of a single median implant placed in the edentulous mandible to retain a complete denture is not compromised by immediate loading. Secondary outcomes were differences in prosthetic complications between the loading principles. Each of the 158 patients who received an implant was randomly assigned to the immediate loading group ( n = 81) or the delayed loading group ( n = 77). Recall visits were performed 1 mo after implant placement (for only the delayed loading group) and 1, 4, 12, and 24 mo after implant loading...
October 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29044894/immediate-implant-placement-and-provisionalization-following-tumor-resective-surgery-in-the-midfacial-region-a-case-series
#7
Nelson Fernandes, Jacobus van den Heever, Leanne Sykes
Surgical and prosthodontic restoration of the midfacial region following tumor resection has always posed a considerable challenge, as this area serves crucial functional and esthetic roles. Being diagnosed and subsequently treated for facial tumors can have an immense psychosocial impact on a patient, as the resulting defects are often disfiguring, and lead to an inability to masticate, swallow, and speak clearly. Provision of an immediate facial and dental prosthesis at the time of surgery can limit these side effects and help reduce mental duress on these patients and their families, as well as aid in the process of rehabilitation...
October 18, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29044525/susceptibility-of-different-mouse-strains-to-peri-implantitis
#8
S Hiyari, A Naghibi, R Wong, R Sadreshkevary, L Yi-Ling, S Tetradis, P M Camargo, F Q Pirih
BACKGROUND AND OBJECTIVE: Peri-implantitis (PI) is an inflammatory condition that affects the tissues surrounding dental implants. Although the pathogenesis of PI is not fully understood, evidence suggests that the etiology is multifactorial and may include a genetic component. The aim of this study was to investigate the role of genetics in the development of peri-implantitis. MATERIAL AND METHODS: Four-week-old C57BL/6J, C3H/HeJ and A/J male mice had their left maxillary molars extracted...
October 17, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29042741/management-of-broken-dental-implant-abutment-in-a-patient-with-bruxism-a-rare-case-report-and-review-of-literature
#9
Saad Al-Almaie
This rare case report describes prosthodontic complications resulting from a dental implant was placed surgically more distally in the area of the missing mandibular first molar with a cantilever effect and a crest width of >12 mm in a 59-year-old patient who had a history of bruxism. Fracture of abutment is a common complication in implant was placed in area with high occlusal forces. Inability to remove the broken abutment may most often end up in discarding the implant. Adding one more dental implant mesially to the previously placed implant, improvisation of technique to remove the broken abutment without sacrificing the osseointegrated dental implant, fabrication with cemented custom-made abutment to replace the broken abutment for the first implant, and the use of the two implants to replace a single molar restoration proved reliable and logical treatment solutions to avoid these prosthodontic complications...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29042724/evaluation-of-bond-strength-between-grooved-titanium-alloy-implant-abutments-and-provisional-veneering-materials-after-surface-treatment-of-the-abutments-an-in-vitro-study
#10
Gowtham Venkat, Murugesan Krishnan, Suganya Srinivasan, Muthukumar Balasubramanian
INTRODUCTION: Titanium has become the material of choice with greater applications in dental implants. The success of the dental implant does not only depend on the integration of the implant to the bone but also on the function and longevity of the superstructure. The clinical condition that demands long-term interim prosthesis is challenging owing to the decreased bond between the abutment and the veneering material. Hence, various surface treatments are done on the abutments to increase the bond strength...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29042114/extending-the-service-life-of-existing-dental-restorations-with-esthetic-and-functional-limitations
#11
Malin Strasding, Vincent Fehmer, Bjarni E Pjetursson, Irena Sailer
Adhesive cementation is a useful procedure not only for cementing restorations onto teeth but also for attaching new ceramic restorations to existing restorations to improve their esthetics and/or function. This clinical report presents a technique for modifying an existing nonsatisfactory implant-supported fixed dental prosthesis by means of adhesively cemented veneers and onlays bonded to the pre-existing metal-ceramic surface with resin cement. This modification may avoid the replacement of the fixed dental prosthesis, reducing both treatment costs and time while fulfilling the patient's demands...
October 14, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29040148/long-term-effects-of-bone-morphogenetic-protein-2-loaded-calcium-phosphate-on-maxillary-sinus-lift-surgery-for-delayed-and-simultaneous-dental-implantation
#12
Yuefeng Ding, Xuejuan Wang
Maxillary sinus lift surgery (MSLS) is considered to be a useful treatment method for patients with atrophic alveolar bone. Choosing a suitable surgical procedure to simultaneously decrease graft absorption and obtain long-term survival of dental implants is still a challenge. In this study, 20 patients received MSLS with graft of bone morphogenetic protein 2 (BMP2)-loaded calcium phosphate. Dental implants were placed simultaneously in 10 patients receiving MSLS (1-stage group), and in 10 patients receiving dental implants with a 3 to 6 months delay (2-stage group)...
October 16, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29034598/a-prospective-randomized-controlled-trial-of-the-two-window-technique-without-membrane-versus-the-solo-window-technique-with-membrane-over-the-osteotomy-window-for-maxillary-sinus-augmentation
#13
Huajie Yu, Danqing He, Lixin Qiu
BACKGROUND: Maturation of the grafted volume after lateral sinus elevation is crucial for the long-term survival of dental implants. PURPOSE: To compare endo-sinus histomorphometric bone formation between the solo- and two-window maxillary sinus augmentation techniques with or without membrane coverage for the rehabilitation of multiple missing posterior teeth. MATERIALS AND METHODS: Patients with severely atrophic posterior maxillae were randomized to receive lateral sinus floor elevation via the solo-window technique with membrane coverage (Control Group) or the two-window technique without coverage (Test Group)...
October 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29034574/morphometric-and-histologic-characterization-of-alveolar-bone-from-hypertensive-patients
#14
André Luís da Silva Fabris, Gabriel Mulinari-Santos, Jaqueline Suemi Hassumi, Alexandre Rodrigues Freire, Leonardo Perez Faverani, Reinhard Gruber, Roberta Okamoto
BACKGROUND: Hypertension is considered a risk factor in implant dentistry but the underlying reasons remain unclear. It may be that hypertension has a negative impact on the local bone quality. PURPOSE: Here we evaluated the structural and histological parameters of bone collected from hypertensive patients treated by antagonists of the renin-angiotensin system, and of bone collected from normotensive patients. MATERIAL AND METHODS: A total of 30 patients were referred for rehabilitation with dental implants to be placed in the posterior mandible...
October 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29033526/complexity-of-comprehensive-care-treatments-in-undergraduate-dental-programs-the-benefits-of-observing-and-assisting-experienced-faculty-members
#15
Moataz Elgezawi, Khalid Hassan, Adel Alagl, Ahmad M Al-Thobity, Basel Al-Mutairi, Thamir Al-Houtan, Shazia Sadaf
OBJECTIVE: To improve the confidence of the final year dental students in completing occlusal and oral rehabilitation of patients, with complexities beyond their scope, based on full analysis of the biomechanical and esthetic considerations of each case. MATERIAL & METHODS: Two comprehensive patient situations presenting with special difficulties including extensive, reduced vertical dimension of occlusion, limited interocclusal space and maxillary alveolar bone for implant insertion necessitating bone augmentation and a sinus lift surgery was managed by two students at our institute...
October 2017: Saudi Dental Journal
https://www.readbyqxmd.com/read/29032854/intrasinusal-locking-technique-a-novel-use-of-the-ring-block-technique-at-sinus-perforations-for-simultaneous-implant-placement
#16
A Sindel, M M Özarslan, Ö Özalp
Ten patients who underwent sinus lift surgery with simultaneous implant placement using the intrasinusal locking technique were evaluated retrospectively. All patients were scheduled for sinus floor elevation procedures with simultaneous implant placement. Schneiderian membrane perforation occurred during the lifting procedure, and conventional methods failed to repair the perforation. Therefore, an autogenous bone ring was placed at the base of the maxillary sinus and was locked to the alveolar crest with a dental implant...
October 9, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29032313/influence-of-platform-diameter-in-the-reliability-and-failure-mode-of-extra-short-dental-implants
#17
Dimorvan Bordin, Edmara T P Bergamo, Estevam A Bonfante, Vinicius P Fardin, Paulo G Coelho
PURPOSE: To evaluate the influence of implant diameter in the reliability and failure mode of extra-short dental implants. MATERIALS AND METHODS: Sixty-three extra-short implants (5mm-length) were allocated into three groups according to platform diameter: Ø4.0-mm, Ø5.0-mm, and Ø6.0-mm (21 per group). Identical abutments were torqued to the implants and standardized crowns cemented. Three samples of each group were subjected to single-load to failure (SLF) to allow the design of the step-stress profiles, and the remaining 18 were subjected to step-stress accelerated life-testing (SSALT) in water...
September 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29030280/mobilization-of-malpositioned-dental-implant-using-segmental-osteotomy-a-case-report
#18
Mahdi Gholami
By increasing the number of replaced tooth with dental implants, the number of poorly positioned implants is also increased. In this article we present our experience about a 48-year-old female who was referred to our department for resolving prosthetic problem regarding two malpositioned implants inserted in the upper jaw. The interocclusal space was insufficient and the two adjacent implants had excessive buccal angulation. To overcome these problems, segmental osteotomy of the alveolar bone containing two implants has been done...
October 10, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29030276/dental-occlusal-surface-supported-titanium-guide-to-assist-cutting-and-drilling-in-mandibular-bilateral-sagittal-split-osteotomy
#19
Charles Savoldelli, Clair Vandersteen, Olivier Dassonville, Joseph Santini
INTRODUCTION: Cutting and drilling guides manufactured using computer-aided design/computer-aided manufacturing (CAD/CAM) technologies have attracted increasing interest in orthognathic surgery, particularly in complex cases. The development of these guides requires virtual surgery planning and three-dimensional modelling before they can be printed in titanium, polyamide, or resin. We report the use of a personalized titanium device to assist bilateral sagittal split osteotomy (BSSO) with or without genioplasty combined with individual implants for repositioning and fixation...
October 10, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29029850/surface-characteristics-of-dental-implants-a-review
#20
REVIEW
F Rupp, L Liang, J Geis-Gerstorfer, L Scheideler, F Hüttig
OBJECTIVES: During the last decades, several changes of paradigm have modified our view on how biomaterials' surface characteristics influence the bioresponse. After becoming aware of the role of a certain microroughness for improved cellular contact and osseointegration of dental titanium implants, the likewise important role of surface energy and wettability was increasingly strengthened. Very recently, synergistic effects of nanoscaled topographical features and hydrophilicity at the implant/bone interface have been reported...
October 10, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
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