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Peri-implant bone

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https://www.readbyqxmd.com/read/29158650/partial-humeral-replacement-for-peri-prosthetic-fractures-of-the-humerus
#1
Ruben Manohara, Colin R Howie
Introduction: Treating peri-prosthetic fractures of the humerus can be very challenging, especially when there is poor bone stock and in the presence of adjacent joint prostheses. We discuss the option of a partial humeral replacement as a salvage procedure for such cases with some technical comments. Methods: This paper presents a technique which utilises a custom- made cemented connector to incorporate the existing well functioning elbow or shoulder replacement with a commercially available partial humeral replacement (PHR) or to an existing prosthetic humeral stem...
November 2017: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29152286/bony-spicules-trapped-in-peri-implant-soft-tissue-a-common-unrecognized-finding
#2
Teeratida Sampatanukul, Pravej Serichetaphongse, Pichet Sampatanukul, Atiphan Pimkhaokham
According to the study, there were unexpected tiny bone spicules being inspected in peri-implant soft tissue. These displaced autogenous bone chips were probably presented when preparing implant sites. The displaced bone spicules seemed not induced significant inflammatory reactions; on contrary, defects of specimens and dissolving bone spicules pictures were demonstrated.
November 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29148260/peri-implant-parameters-and-c-reactive-protein-levels-among-patients-with-different-obesity-levels
#3
Fahim Vohra, Fahad Alkhudhairy, Abdulaziz A Al-Kheraif, Zohaib Akram, Fawad Javed
BACKGROUND: It is hypothesized that peri-implant conditions are worse with increasing severity of obesity, because systemic low-grade inflammatory marker (C-reactive protein [CRP]) is higher in severe form of obese individuals. PURPOSE: The aim of the cross-sectional retrospective study was to compare clinical and radiographic peri-implant inflammatory parameters in patients with different levels of obesity and correlate these parameters with CRP levels. MATERIALS AND METHODS: Eighty-four patients who participated in this study were divided into 4 groups: class I obese (group 1), class II obese (group 2), class III obese (group 3), and nonobese individuals (group 4) were included...
November 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29148235/assessment-of-interleukin-1%C3%AE-interleukin-6-and-tumor-necrosis-factor-%C3%AE-levels-in-the-peri-implant-sulcular-fluid-among-waterpipe-narghile-smokers-and-never-smokers-with-peri-implantitis
#4
Tariq Abduljabbar, Zohaib Akram, Fahim Vohra, Saman Warnakulasuriya, Fawad Javed
BACKGROUND: It is hypothesized that levels of interleukin (IL)-1β, IL-6 and tumor necrosis factor (TNF)-α are significantly higher in the peri-implant sulcular fluid (PISF) of waterpipe-smokers (WS) compared with never-smokers with peri-implantitis. PURPOSE: The aim of the present convenience sample case-control study was to compare the levels of IL-6, IL-1β, and TNF-α in the PISF of WS and never-smokers with peri-implantitis. MATERIALS AND METHODS: Demographic data was collected using a questionnaire...
November 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29147823/primary-peri-implant-oral-intra-epithelial-neoplasia-carcinoma-in-situ-a-case-report-considering-risk-factors-for-carcinogenesis
#5
Makoto Noguchi, Hiroaki Tsuno, Risa Ishizaka, Kumiko Fujiwara, Shuichi Imaue, Kei Tomihara, Takashi Minamisaka
BACKGROUND: Major risk factors for oral squamous cell carcinoma (SCC) are tobacco smoking, a betel quid chewing habit, and heavy alcohol consumption. However, around 15% of oral SCCs cannot be explained by these risk factors. Although oral SCC associated with dental implants is quite rare, there has been a recent gradual accumulation of reports about it. Here, we report a case of primary peri-implant oral intra-epithelial neoplasia/carcinoma in situ (OIN/CIS) in a woman without the major risk factors for oral SCC...
November 16, 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/29145529/volumetric-bone-measurement-around-dental-implants-using-3d-image-superimposition-a-methodological-and-clinical-pilot-study
#6
Eduardo Aydos Villarinho, André Correia, Alvaro Vigo, Nuno Viriato Ramos, Mário Augusto Pires Vaz, Rosemary Sadami Arai Shinkai
PURPOSE: This study describes the development of a methodology for using three-dimensional (3D) image superimposition to measure volumetric changes in bone level around dental implants in comparison with linear measures. MATERIALS AND METHODS: The sample was comprised of 46 dental implants of 6-mm length and 4.1-mm diameter placed in the posterior maxilla and posterior mandible in 20 patients. All implants received screw-retained single crowns. Radiographic images were taken using cone beam computed tomography (CBCT) and digital periapical radiography after implantation and after 12 and 24 months of functional loading (after crown installation)...
November 16, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29143462/evaluation-of-immediate-implants-augmented-with-autogenous-bone-melatonin-composite-graft-in-the-esthetic-zone-a-randomized-controlled-trial
#7
Hala H A Hazzaa, Naglaa Sh El-Kilani, Shadia Abd-Elhameed Elsayed, Phoebe M Abd El Massieh
PURPOSE: To evaluate the clinical and radiographic outcomes following the application of autogenous bone (ABG)/melatonin composite graft around immediate implants in the esthetic zone compared to ABG alone. MATERIALS AND METHODS: Twenty-six patients with two nonrestorable anterior/premolar teeth were randomly classified into two equal groups. Dental implants were immediately inserted either with ABG (control group) or ABG/melatonin (test group). Outcome measures were peri-implant sulcus depth (PD), gingival index (GI), and wound healing scores...
November 16, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29140374/implant-abutment-connections-a-review-of-biologic-consequences-and-peri-implantitis-implications
#8
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/29137395/lithium-chloride-inhibits-titanium-particle-induced-osteoclastogenesis-by-inhibiting-the-nf-%C3%AE%C2%BAb-pathway
#9
Xuanyang Hu, Zhirong Wang, Jiawei Shi, Xiaobin Guo, Liangliang Wang, Zichuan Ping, Yunxia Tao, Huilin Yang, Jun Zhou, Yaozeng Xu, Dechun Geng
Osteoclast over-activation and inflammation responses promote peri-implant osteolysis (PIO), which is the leading cause of aseptic artificial joint loosening. We examined the effect of lithium chloride (LiCl) on wear debris-induced osteoclastogenesis and inflammation. Fifty-Six C57BL/6J male mice were randomly distributed into four groups: sham control (sham, treated with phosphate buffered saline [PBS]), vehicle (treated with titanium/PBS), low-LiCl (L-LiCl, titanium: 50 mg/kg LiCl) and high-LiCl (H-LiCl, titanium: 200 mg/kg LiCl)...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29132335/topical-zoledronic-acid-decreases-micromotion-induced-bone-resorption-in-a-sheep-arthroplasty-model
#10
Thomas Jakobsen, Søren Kold, Juan Shiguetomi-Medina, Jorgen Baas, Kjeld Soballe, Ole Rahbek
BACKGROUND: Initial micromotion of a total hip replacement is associated with aseptic loosening. The use of bisphosphonates could be one way to reduce peri-implant bone resorption induced by micromotion. Bisphosphonates compounds are inhibitors of bone resorption. The aim of this study was to investigate whether local treatment with bisphosphonate would reduce bone resorption and fibrous tissue around an experimental implant subjected to micromotion. METHODS: One micromotion implant were inserted into each medial femoral condyle in ten sheep...
November 13, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29130804/is-metal-particle-release-associated-with-peri-implant-bone-destruction-an-emerging-concept
#11
T Fretwurst, K Nelson, D P Tarnow, H-L Wang, W V Giannobile
Peri-implant diseases affecting the surrounding structures of endosseous dental implants include peri-implant mucositis and peri-implantitis. The prevalence of peri-implantitis ranges between 15% and 20% after 10 y, highlighting the major challenge in clinical practice in the rehabilitation of dental implant patients. The widespread nature of peri-implant bone loss poses difficulties in the management of biological complications affecting the long-term success of osseointegrated implant reconstructions. Metal and titanium particles have been detected in peri-implant supporting tissues...
November 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29130485/sophocarpine-attenuates-wear-particle-induced-implant-loosening-by-inhibiting-osteoclastogenesis-and-bone-resorption-via-suppression-of-the-nf-%C3%AE%C2%BAb-signaling-pathway-in-a-rat-model
#12
Chen-He Zhou, Zhong-Li Shi, Jia-Hong Meng, Bin Hu, Chen-Chen Zhao, Yu-Te Yang, Wei Yu, Ze-Xin Chen, Boon Chin Heng, Virginia-Jeni Akila Parkman, Shuai Jiang, Han-Xiao Zhu, Hao-Bo Wu, Wei-Liang Shen, Shi-Gui Yan
BACKGROUND AND PURPOSE: Aseptic prosthesis loosening, caused by wear particles, is one of the most common causes of arthroplasty failure. Extensive and over-activated osteoclast formation and physiological functioning are regarded as the mechanism of prosthesis loosening. Therapeutic modalities based on inhibiting osteoclast formation and bone resorption have been confirmed to be an effective way of preventing aseptic prosthesis loosening. In this study, we have investigated the effects of sophocarpine (SPC, derived from Sophora flavescens) on preventing implant loosening and further explored the underlying mechanisms...
November 11, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29127889/nitric-oxide-and-arginase-levels-in-peri-implant-tissues-after-delayed-loading
#13
Ceren Gokmenoglu, Nurdan Ozmeric, Caglar Sungur, Raziye Sahin Bildik, Imge Erguder, Serenay Elgun
OBJECTIVE: Nitric oxide (NO) is synthesized from the conversion of L-arginine to L-citrulline by NO synthase (NOS). Arginase can compete with NOS for the common substrate L-arginine, and thus inhibit NO production. NO levels and arginase ezyme might affect the bone remodeling cycle around implants. The aim of this studywas to investigate NO and arginase levels in gingival crevicular fluid (GCF), peri-implant sulcular fluid (PISF), and saliva. MATERIALS AND METHODS: Twenty patients with one or more implants (Straumann(®); Institute Straumann AG, Basel, Switzerland) restored with fixed crown prostheses were included in the study...
October 23, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29126690/evaluation-of-peri-implant-bone-levels-and-soft-tissue-dimensions-around-zirconia-implants-a-three-year-follow-up-study
#14
K Kniha, K A Schlegel, H Kniha, A Modabber, F Hölzle, K Kniha
The aim of this study was to measure bone levels around zirconia implants during follow-up of up to 3 years. Additionally, the effect of clinical contact point positions on the papilla deficit was evaluated. Eighty-one patients with 105 zirconia implants were examined at the 3-year follow-up. Bone levels were measured on the date of implant placement and at 3 months, 1year, and 3 years thereafter. Distances between the first bone-implant contact and the contact point of the crowns and between the bone level at the adjacent tooth and the contact point of the crowns were assessed...
November 7, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29125652/mini-implants-and-narrow-diameter-implants-as-mandibular-overdenture-retainers-a-systematic-review-and-meta-analysis-of-clinical-and-radiographic-outcomes
#15
REVIEW
Raissa Machado Marcello-Machado, Fernanda Faot, Alessandra Julie Schuster, Gustavo G Nascimento, Altair Antoninha Del Bel Cury
This study reviews the clinical and radiographic outcomes of Mini-implants (MI) and Narrow Diameter Implants (NDI) as mandibular overdenture (MO) retainers. Six databases were consulted for clinical studies that evaluated implants with diameter ≤ 3.5 mm. Data on the MI and NDI for survival and success rate and peri-implant bone loss and were collected and submitted to meta-analysis. Thirty-six studies were included, 24 reporting MI performance and 12 describing NDI results. The MI group comprised data from 1 cross-sectional clinical study, 3 retrospective longitudinal (RL) clinical studies, 13 prospective longitudinal (PL) clinical studies and 7 randomized clinical trials (RCT) with follow-up periods ranging from 1 day to 7 years...
November 10, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29124995/peri-implant-soft-tissue-parameters-and-crestal-bone-levels-among-narghile-smokers-and-nonsmokers
#16
Tariq Abduljabbar, Nawaf Al-Hamoudi, Muath AlQunayan, Abdullah AlAhmari, Alwaleed AlMalki, Elham Gholamiazizi, Fahim Vohra
This retrospective convenient sample case-control study investigated the peri-implant soft-tissue inflammatory parameters and crestal bone loss (CBL) among narghile smokers (NS) (Group I) and nonsmoking controls (Group II). Demographic data were collected using a questionnaire. Peri-implant plaque index (PI), bleeding-on-probing (BOP) and pocket-depth (PD) were assessed; and peri-implant CBL was measured on standardized digital bite-wing radiographs. Sample-size was estimated and statistical analysis were done using Mann-Whitney U-test...
August 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/29104084/orthopaedic-implant-materials-drive-m1-macrophage-polarization-in-a-spleen-tyrosine-kinase-and-mitogen-activated-protein-kinase-dependent-manner
#17
Olwyn R Mahon, Sarah O'Hanlon, Clare C Cunningham, Geraldine M McCarthy, Christopher Hobbs, Valeria Nicolosi, Daniel J Kelly, Aisling Dunne
Total joint replacements (TJR) are costly procedures required to relieve pain and restore function in patients suffering from end-stage arthritis. Despite great progress in the development and durability of TJRs, the generation of prosthesis-associated wear particles over time leads to an inflammatory cascade which culminates in periprosthetic osteolysis. Studies suggest that wear particles drive the polarization/differentiation of immature macrophages towards a pro-inflammatory M1 phenotype rather than an anti-inflammatory M2 phenotype associated with normal bone and wound healing...
November 2, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29094012/managing-extremely-distal-periprosthetic-femoral-supracondylar-fractures-of-total-knee-replacements-a-new-philos-ophy
#18
Kevin J Donnelly, Adam Tucker, Angel Ruiz, Neville W Thompson
We report two cases where a proximal humeral locking plate was used for the fixation of an extremely distal, type III peri-prosthetic femoral fractures in relation to a total knee replacement (TKR). In each case there was concern regarding the fixation that could be achieved using the available anatomic distal femoral plates due to the size and bone quality of distal fragment. The design of the Proximal Humeral Internal Locking System (PHILOS) allows nine 3.5-mm locking screws to be placed over a small area in multiple directions...
October 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29093988/bone-level-implants-placed-in-the-anterior-maxilla-an-open-label-single-arm-observational-study
#19
EnFeng Gao, Wei-Hong Hei, Jong-Chul Park, KangMi Pang, Sun Kyung Kim, Bongju Kim, Soung-Min Kim, Jong-Ho Lee
Purpose: This study assessed marginal bone remodeling and soft tissue esthetics after the loading of single bone-level implants in the anterior maxilla. Methods: An open, single-arm observational clinical trial with 3 years of follow-up was performed, including 22 implants. The patients presented with a single tooth gap in the anterior maxilla (tooth positions 14-24), with natural or restored adjacent teeth. An implant was placed at least 8 weeks post-extraction and healed submerged for 6 weeks...
October 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/29092985/fixation-and-clinical-outcome-of-uncemented-peri-apatite-coated-versus-cemented-total-knee-arthroplasty-five-year-follow-up-of-a-randomised-controlled-trial-using-radiostereometric-analysis-rsa
#20
K T van Hamersveld, P J Marang-van de Mheen, R Tsonaka, E R Valstar, S Toksvig-Larsen
AIMS: The optimal method of tibial component fixation remains uncertain in total knee arthroplasty (TKA). Hydroxyapatite coatings have been applied to improve bone ingrowth in uncemented designs, but may only coat the directly accessible surface. As peri-apatite (PA) is solution deposited, this may increase the coverage of the implant surface and thereby fixation. We assessed the tibial component fixation of uncemented PA-coated TKAs versus cemented TKAs. PATIENTS AND METHODS: Patients were randomised to PA-coated or cemented TKAs...
November 2017: Bone & Joint Journal
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