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Dental implant connection

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https://www.readbyqxmd.com/read/29313133/influence-of-subcrestal-implant-placement-compared-with-equicrestal-position-on-the-peri-implant-hard-and-soft-tissues-around-platform-switched-implants-a-systematic-review-and-meta-analysis
#1
REVIEW
Cristina Valles, Xavier Rodríguez-Ciurana, Marco Clementini, Mariana Baglivo, Blanca Paniagua, Jose Nart
AIM: The aim of this article is to systematically review the effect of subcrestal implant placement compared with equicrestal position on hard and soft tissues around dental implants with platform switch. MATERIAL AND METHODS: A manual and electronic search (National Library of Medicine and Cochrane Central Register of Controlled Trials) was performed for animal and human studies published up to December 2016. Primary outcome variable was marginal bone level (MBL) and secondary outcomes were crestal bone level (CBL), soft tissue dimensions (barrier epithelium, connective tissue, and peri-implant mucosa), and changes in the position of soft tissue margin...
January 8, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29310880/the-hemi-engaging-fixed-dental-implant-prosthesis-a-technique-for-improved-stability-and-handling
#2
Todd R Schoenbaum, Richard G Stevenson, Eric Balinghasay
Clinicians commonly contend that the screw-retained, implant-supported fixed dental prosthesis (FDP) should be fabricated with all nonengaging abutments to allow for the inherent nonparallelism of the implants and the inability of the abutment connections to draw together during insertion and removal. The problem with a fully nonengaging FDP is difficulty in handling and more strain on the abutment screws, ultimately leading to increased rates of breakage and loosening. The hemi-engaging FDP design regains much of the advantage afforded by the internal connection and improves prosthetic handing both clinically and in the laboratory...
January 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29302289/preload-loss-of-abutment-screws-after-dynamic-fatigue-in-single-implant-supported-restorations-a-systematic-review
#3
REVIEW
Beatriz Pardal-Peláez, Javier Montero
Background: To carry out a systematic literature review of the causes of preload loss of the abutment screws, of internal and external connection implants, tightened to different torque values and subjected to cyclic loading. Material and Methods: A systematic search was conducted in PubMed, EMBASE, and Cochrane Library databases with reference to in vitro studies in which internal and external connection implants were subjected to cyclic loads to determine the degree of loosening of the abutment screws after loading...
November 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29240199/late-dental-implant-failures-associated-with-retained-root-fragments-case-reports-with-histologic-and-sem-analysis
#4
Marc L Nevins, Laureen Langer, Peter Schupbach
Interest has recently developed in the purposeful retention of root fragments with their periodontal apparatus to support bone and soft tissue at immediate implant sites in the esthetic zone. This methodology is designed to avoid bone grafting, connective tissue grafts, and the use of membranes and may have short-term benefits in terms of tissue preservation. However, it is not completely without long-term risks. At times, implants may be unintentionally placed into edentulous sites where root fragments remain...
January 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29238725/the-accuracy-of-new-and-aged-mechanical-torque-devices-employed-in-five-dental-implant-systems
#5
Mehmet Ali Erdem, Burcin Karatasli, Onur Dinçer Kose, Taha Emre Kose, Erhan Çene, Serhan Aydın Aya, Abdulkadir Burak Cankaya
Purpose: Friction-style and spring-style torque wrenches are used to tighten implant abutments and prosthetic screws. The mechanical stability of these torque wrenches is crucial for the implant-abutment connection. The purposes of this study were to assess the performance of five brands (Straumann, Zimmer, Implant KA, Bredent, and Biohorizons) of wrench and to evaluate possible changes in applied torque values of aged wrenches. Materials and Methods: Five new and aged wrenches that had been used approximately 250 times in a 1-year period were tested...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29209690/prosthetic-rehabilitation-involving-the-use-of-implants-following-a-fibula-free-flap-reconstruction-in-the-treatment-of-osteosarcoma-of-the-maxilla-a-case-report
#6
E Brauner, A Quarato, F De Angelis, G Pompa, S Jamshir, V Valentini, S Di Carlo
INTRODUCTION: Osteosarcoma is an aggressive primary bone tumor composed of connective tissue cells directly producing osteoid and bone. Prosthetic rehabilitations in post-oncological patients after bone reconstruction are not substantially different than those of patients affected by severe atrophy of upper or lower jaw after bone reconstruction. The treatment for patients with a malignant neoplasia of the oral cavity requires multidisciplinary approach by a team of different specialists that follow the patient through the phases of diagnosis, therapy and oral rehabilitation...
November 2017: La Clinica Terapeutica
https://www.readbyqxmd.com/read/29202047/subgingival-microbiome-colonization-and-cytokine-production-during-early-dental-implant-healing
#7
Jeffrey B Payne, Paul G Johnson, Car Reen Kok, João C Gomes-Neto, Amanda E Ramer-Tait, Marian J Schmid, Robert W Hutkins
Little is known about longitudinal development of the peri-implant subgingival microbiome and cytokine production as a new sulcus forms after dental implant placement. Therefore, the purpose of this observational study was to evaluate simultaneous longitudinal changes in the oral microbiome and cytokine production in the developing peri-implant sulcus compared to control natural teeth. Four and 12 weeks after implant placement and abutment connection, a dental implant and a natural tooth were sampled in 25 patients for subgingival plaque and gingival crevicular fluid (GCF [around teeth] and peri-implant crevicular fluid [PICF] around implants)...
November 2017: MSphere
https://www.readbyqxmd.com/read/29190785/inclusion-of-periodontal-ligament-fibres-in-mandibular-finite-element-models-leads-to-an-increase-in-alveolar-bone-strains
#8
Steven W McCormack, Ulrich Witzel, Peter J Watson, Michael J Fagan, Flora Gröning
Alveolar bone remodelling is vital for the success of dental implants and orthodontic treatments. However, the underlying biomechanical mechanisms, in particular the function of the periodontal ligament (PDL) in bone loading and remodelling, are not well understood. The PDL is a soft fibrous connective tissue that joins the tooth root to the alveolar bone and plays a critical role in the transmission of loads from the tooth to the surrounding bone. However, due to its complex structure, small size and location within the tooth socket it is difficult to study in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/29166418/prosthetic-rehabilitation-of-a-patient-with-rare-and-severe-enamel-renal-syndrome
#9
Cedric Mauprivez, Jean-Francois Nguyen, Muriel de la Dure-Molla, Adrien Naveau
Dental rehabilitation of acute cases of enamel renal syndrome is challenging due to the absence of clinical reports. In the present case history report, examination of an 18-year-old patient revealed a complete lack of permanent teeth, as well as irregular and swollen bone and gingival morphology. Radiographs showed multiple impacted teeth in both arches. Creating a 1.5- to 2-cm interarch space was necessary for setting complete dentures. The ideal occlusal plane was chosen by combining two techniques (cephalometric radiograph and modification of the mandibular occlusal rim according to anatomical guidelines)...
November 22, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29140374/implant-abutment-connections-a-review-of-biologic-consequences-and-peri-implantitis-implications
#10
Yuya Sasada, David L Cochran
Clinicians very often have seen marginal bone loss around dental implants at the crest level early on after implant placement and uncovering. Early clinical publications had suggested that this bone loss occurred during the first year of loading. Thus, numerous attempts have been made to minimize or eliminate such bone loss. However, the timing and reason for this bone loss are not always apparent. The objective of this study was to review the evidence regarding marginal bone loss around dental implants from the standpoint of biologic consequences to help understand marginal bone changes around dental implants...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29081448/the-effective-design-of-zirconia-coping-on-titanium-base-in-dental-implant-superstructure
#11
Maiko Mieda, Ikiru Atsuta, Yasuyuki Matsushita, Takehiro Morita, Yasunori Ayukawa, Yoshihiro Tsukiyama, Yoshinori Sawae, Kiyoshi Koyano
Zirconia exhibits good tissue compatibility and nontoxicity, making it a widely used esthetic replacement material for implant abutments. To avoid abutment-fracture, the parts composed of zirconia with a bonded metal component connected to the implant can be used. The purpose of this study was to design titanium and zirconia components with high fracture resistance at the zirconia component's edge line. Three edge line designs of the titanium base and zirconia sleeve were made: chamfer, shoulder, and backtaper...
October 27, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/29067778/dentists-most-common-practices-when-selecting-an-implant-system
#12
Ahed Al-Wahadni, Mohamed S Barakat, Khladoon Abu Afifeh, Yusuf Khader
PURPOSE: To report a comprehensive description of dental implant system selection practices among dentists practicing implantology worldwide. MATERIALS AND METHODS: An online questionnaire was designed and sent to members of 15 dental implant organizations. The survey questions addressed: dental implant system selection criteria, implant design variables, dentists' perspective to implant quality stamps, and dentists' satisfaction with their implant system(s). Responses were compiled and analyzed to determine correlation of responses using the chi-squared test (level of significance α ≤ 0...
October 25, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29065610/hollow-abutment-screw-design-for-easy-retrieval-in-case-of-screw-fracture-in-dental-implant-system
#13
Bo Kyun Sim, Bongju Kim, Min Jeong Kim, Guk Hyun Jeong, Kyung Won Ju, Yoo Jin Shin, Man Yong Kim, Jong-Ho Lee
The prosthetic component of dental implant is attached on the abutment which is connected to the fixture with an abutment screw. The abutment screw fracture is not frequent; however, the retrieval of the fractured screw is not easy, and it poses complications. A retrieval kit was developed which utilizes screw removal drills to make a hole on the fractured screw that provides an engaging drill to unscrew it. To minimize this process, the abutment screw is modified with a prefabricated access hole for easy retrieval...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29064779/anatomic-customization-of-root-analog-dental-implants-with-cone-beam-ct-and-cad-cam-fabrication-a-cadaver-based-pilot-evaluation
#14
Zachary Presson Evans, Walter G Renne, Thierry R Bacro, Anthony S Mennito, Mark E Ludlow, Michael K Lecholop
Existing root-analog dental implant systems have no standardized protocols relative to retentive design, surface manipulation, or prosthetic attachment design relative to the site's unique anatomy. Existing systems historically made these design choices arbitrarily. For this report, strategies were developed which deliberately reference the adjacent anatomy, implant and restorable path of draw, and bone density for the purposes of implant and retentive design. For proof-of-concept, dentate arches from human cadavers were scanned with cone-beam computed tomography and digitally modeled...
October 24, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29064632/the-effects-of-platelet-derived-growth-factor-bb-on-human-dental-pulp-stem-cells-mediated-dentin-pulp-complex-regeneration
#15
Maolin Zhang, Fei Jiang, Xiaochen Zhang, Shaoyi Wang, Yuqin Jin, Wenjie Zhang, Xinquan Jiang
Dentin-pulp complex regeneration is a promising alternative treatment for the irreversible pulpitis caused by tooth trauma or dental caries. This process mainly relies on the recruitment of endogenous or the transplanted dental pulp stem cells (DPSCs) to guide dentin-pulp tissue formation. Platelet-derived growth factor (PDGF), a well-known potent mitogenic, angiogenic, and chemoattractive agent, has been widely used in tissue regeneration. However, the mechanisms underlying the therapeutic effects of PDGF on dentin-pulp complex regeneration are still unclear...
October 24, 2017: Stem Cells Translational Medicine
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
#16
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...
November 1, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
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
#17
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/29023618/reconstruction-of-atrophied-posterior-mandible-with-an-inlay-technique-and-allograft-block-technical-description-and-histologic-case-reports
#18
Vittorio Checchi, Annalisa Mazzoni, Giovanni Zucchelli, Lorenzo Breschi, Pietro Felice
This paper presents a technical description of the inlay technique performed with an allograft block in the reconstruction of a severely atrophic posterior mandible. It includes a histologic case series of five patients treated with the same grafting procedure and rehabilitated with dental implants 2 months after placement of the graft. The histologic analysis showed large amounts of newly formed bone in tight connection with the allograft and large marrow spaces with intense cellular activity and the presence of osteocytes...
November 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28989130/evaluation-of-the-sealing-capability-of-the-internal-conical-connections-of-implants-with-titanium-and-zirconia-abutments
#19
Damian L Black, Ilser Turkyilmaz, Wen Lien, Chol H Chong
AIM: The purpose of this in vitro investigation was to evaluate the sealing capability of the conical implant-abutment interfaces under different abutment screw torque values using titanium and zirconia abutments with Morse taper designs. MATERIALS AND METHODS: A total of 42 dental implants (n = 21 for titanium abutments and n = 21 for zirconia abutments) were inoculated internally with three bacteria. These assemblies were divided into four test groups (n = 10) based on screw fixation torques of 35 or 20 Ncm and placed in sterile broth; the remaining abutments were used as positive controls and torqued to 10 Ncm...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28979575/implantology-and-periodontal-disease-the-panacea-to-problem-solving
#20
Giovanni Matarese, Luca Ramaglia, Luca Fiorillo, Gabriele Cervino, Floriana Lauritano, Gaetano Isola
INTRODUCTION: The specialty of periodontology has changed dramatically in recent years. With the long-standing goal of retaining teeth in a functional and esthetical state, the periodontology has developed a high level of expertise in the regeneration of bone and connective tissues that support the teeth. However, periodontists have also joined maxillofacial surgeons as the primary providers of implant surgery. METHODS: The tremendous innovations of periodontists induced also by the marketplace resulted in predictable periodontal treatment outcomes for most patients by the implants led to a dramatically different marketplace in which many patients with periodontitis can be treated by the implants rather than the traditional periodontal treatment...
2017: Open Dentistry Journal
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