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Randomized multicenter comparison of 2 IMZ and 4 TPS screw implants supporting bar-retained overdentures in 425 edentulous mandibles.

PURPOSE: Two treatment concepts for implant-supported bar retention of mandibular overdentures-2 intramobile cylinder (IMZ) implants and a Dolder bar and 4 titanium plasma-sprayed (TPS) screw implants and an angulated bar-were compared in a randomized controlled clinical trial with respect to postprosthetic efficacy and safety. MATERIALS AND METHODS: Four hundred twenty-five patients with edentulous mandibles were enrolled; 212 were randomized to TPS implants (control group) and 213 to IMZ implants (test group). Endpoints were occurrences of postprosthetic integration deficiency (ID), functio

Experimental spinal fusion using sintered bovine bone coated with type I collagen and recombinant human bone morphogenetic protein-2.

STUDY DESIGN: Posterolateral lumbar transverse process fusion using recombinant human bone morphogenetic protein (rhBMP)-2 carried by sintered bovine bone and Type I collagen complex was compared with fusion achieved using autogeneous bone graft or sintered bovine bone alone. OBJECTIVES: This study examined the efficacy of sintered bovine bone coated with Type I collagen as a carrier of rhBMP-2 for lumbar intertransverse process arthrodesis. SUMMARY OF BACKGROUND DATA: Posterolateral intertransverse process arthrodesis using osteoinductive growth factors is performed experimentally in the lu

The relationship of some histologic parameters, radiographic evaluations, and Periotest measurements of oral implants: an experimental animal study.

The objective of this study was to analyze the efficacy and correlation between clinical and histologic parameters used to evaluate oral implants. After extraction of the premolars and a healing time of 4 months in 16 Dutch goats, four Brånemark implants were placed in the maxillary left and right premolar regions. After a healing time of 6 months, followed by another 4 months with the permucosal abutments, the goats were sacrificed and the jaws were block-resected. Before histologic preparation, long-cone radiographs were made and Periotest scores of the implants were recorded. Bone level mea

Surgical- and implant-related factors and onset/progression of peri-implant diseases: An AO/AAP systematic review.

BACKGROUND: The objective of this systematic review was to shed light on the importance of surgical- and implant-related factors on the onset/progression of peri-implant diseases. This systematic review provides an evidence-based overview on the prevention of peri-implant diseases for the Academy of Osseointegration (AO)/American Academy of Periodontology (AAP) Consensus Conference held in August 14-16, 2024 in Oakbrook, IL, USA. METHODS: Systematic screening of electronic sources was performed to identify clinical studies reporting on the impact of surgical- and implant-related factors on pe…

Comparison between Three-Dimensional Printed Titanium and PEEK Cages for Cervical and Lumbar Interbody Fusion: A Prospective Controlled Trial.

OBJECTIVES: The three-dimensional printing titanium (3DPT) cage with excellent biomechanical properties and osseointegration capabilities has been initially used in spinal fusion, while the polyetheretherketone (PEEK) cage, a bioinert material device, has been a widely used for decades with relatively excellent clinical outcomes. This study was performed to investigate the early radiographic and clinical outcomes of 3DPT cage versus PEEK cage in patients undergoing anterior cervical discectomy and fusion (ACDF) and transforaminal lumbar interbody fusion (TLIF). METHODS: This prospective contr…

Excellent mid- to long-term survival of tantalum metal cones in a case series of revision knee arthroplasty with severe bony defects.

PURPOSE: Severe metaphyseal bone defects remain a challenge and represent a growing problem in revision total knee arthroplasty (RTKA). The … years postoperative. Standardised postoperative X-rays were analysed during the final FU visit for osseointegration of the cones, and any signs of implant loosening were assessed with the modified Knee Society Radiographic review criteria. Perioperative and postoperative complications, reoperations, as well as implant and cone re-revisions were analysed. Survivor …

Effect of mandibular residual ridge regularization on peri-implant wound healing when narrow diameter implants are used as overdenture retainers.

STATEMENT OF PROBLEM: Alveolar ridge regularization involves the smoothing and minimal reduction of rough alveolar bone ridge to achieve ade … umor necrosis factor-α (TNF-α) concentrations in peri-implant crevicular fluid were measured during osseointegration on days 7, 15, 30, 60, and 90 and after loading on day 180 after implant placement. Multilevel mixed-effects linear regression analysis and the Kaplan-Meier test were used to analyze the data (α=.05). RESULTS: The ISQ values showed significant diff …

Surface Characteristics and Bioactivity of Zirconia (Y-TZP) with Different Surface Treatments.

BACKGROUND: Zirconia being a bio-inert material needs to be surface treated to render it more bioactive and enhance its osseointegration potential. However, bioactivity studies focusing on the ability of sandblasting and ultraviolet photofunctionalization (UVP) surface treatments in inducing apatite precipitation using simulated body fluid (SBF) are lacking. AIM: The aim of the study was to comparatively evaluate the effect of two different surface treatments-sandblasting with 50 µm alumina and UVP with ultraviolet C (UVC) light on the bioactivity of zirconia. MATERIALS AND METHODS: A total …

Partial prosthetic exchange in the management of chronic prosthetic hip joint infection: a systematic review.

INTRODUCTION: The management of chronic prosthetic hip joint infection is complex, typically requiring prolonged antibiotic therapy in combination with complete prosthesis exchange, performed either in a single stage or in two stages. However, the removal of a well-osseointegrated prosthetic component carries significant surgical risks that may adversely affect the outcome of the therapeutic strategy. The partial exchange strategy, understood as the removal of a single prosthetic component while retaining the well-integrated one, has emerged as an alternative approach for the management of sel

Accuracy of complete arch implant scans recorded by using intraoral and extraoral photogrammetry systems and a noncalibrated splinting technique: A clinical study.

STATEMENT OF PROBLEM: Different implant scanning techniques can be used to capture the position of the implants being restored, including intraoral and extraoral photogrammetry (PG) systems and noncalibrated splinting methods. However, clinical studies that have analyzed the accuracy these implant scanning techniques are sparse. PURPOSE: The purpose of this clinical study was to assess the trueness and precision of complete arch implant scans captured by using 2 extraoral and an intraoral PG system and a noncalibrated splinting technique. MATERIAL AND METHODS: A patient with a maxillary eden

What Is the Cumulative Incidence of Femoral Stem Revision and Stem Complication in Cemented and Uncemented Hip Arthroplasty for Proximal Femoral Metastatic Bone Disease?

BACKGROUND: Hip arthroplasty is often indicated in metastatic bone lesions of the proximal femur, with or without pathologic fracture. Conventional knowledge is that cemented fixation is best, although uncemented fixation has potential advantages of shorter operative time, avoidance of the physiologic stress of cement, and the chance for osseointegration. However, both techniques are options that are employed, and there is no clear evidence to guide this choice. QUESTIONS/PURPOSES: In patients with proximal femoral metastatic bone lesions who were carefully selected either to receive cemented…

Коэффициент успеха зубоврачебных имплантантов у пациентов с аутоиммунными расстройствами: систематический анализ и мета-анализ.

АймАутоиммунные расстройства могут повлиять на метаболизм костей и заживление тканей, что может повлиять на исход зубного имплантата. Цель этого систематического обзора и метаанализа состояла в том, чтобы оценить выживаемость и успех пациентов с аутоиммунными заболеваниями с уделением особого внимания предельным потерям костей и кровотечению в ходе обследования (ПБ). seven базы данных (PubMed, MedLINE, Embase, Scopus, Web of Science, Cochrane Bibrary и CINAHL) проводились в соответствии с предпочтительными руководящими принципами, касающимися представления докладов по темам для системных обзор

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… These are essential for the integration of dental implants with bone and their long-term viability.[ 4 ] Osseointegration is the direct structural and functional bond that formed between the living bone and the implant surface of a load-bearing implant. … It is the leading determinant of implant stability and success.[ 5 ] For osseointegration to occur, a perfect biological interface must be developed, allowing bone biology to interact harmoniously with the implant surface. …

Modular diaphyseal anchor stems with locking screws in the hip revision with massive femoral defects.

INTRODUCTION: Complex femoral defects with insufficient isthmus (Paprosky III and IV) and Vancouver B3 periprosthetic fractures determines the fixation of the revision stems. The objective is to evaluate the results of the modular revision stems with diaphyseal anchor and distal block (Revitan Zimmer Biomet GmbH, Winterthur, Switzerland). Our hypothesis is that this procedure offers a stable primary fixation in cases of alteration of the femoral isthmus. MATERIAL AND METHODS: Retrospective cohort study of 38 patients, minimum follow-up of 12 months (12-94) with severe femoral defects treated

Comparison of Initial Implant Stability of Implants Placed Using Bicortical Fixation, Indirect Sinus Elevation, and Unicortical Fixation.

PURPOSE: The aim of this study was to determine if self-threading dental implants placed using stopper drills to bicortically engage both the alveolar crest and sinus floor (bicortical fixation) achieved primary and/or secondary stability comparable to that of short implants only engaging alveolar crest cortical bone (unicortical fixation) or implants engaging both the crest and sinus floor but via greenstick fracture and grafting (indirect sinus elevation). MATERIALS AND METHODS: Thirty-eight patients exhibiting 7 to 11 mm of bone coronal to the sinus floor as confirmed by preoperative CBCT

High Survivorship With Cementless Stems and Cortical Strut Allografts for Large Femoral Bone Defects in Revision THA.

BACKGROUND: Numerous studies have investigated the clinical and radiographic results of revision THAs with use of cementless stems and cortical strut allografts. However, to our knowledge, no long-term followup studies have evaluated patients undergoing revision THA with use of cortical strut allografts where the allografts provided the primary stability for extensively coated femoral stems in the presence of extensive femoral diaphyseal bone defects. QUESTION/PURPOSES: We performed this study to determine (1) validated outcomes scores; (2) radiographic signs of fixation and allograft healing

A clinical and radiographic case series of implants placed with the simplified minimally invasive antral membrane elevation technique in the posterior maxilla.

The aim of the present case series was to evaluate a simplified minimally invasive transalveolar sinus elevation technique utilizing calcium phosphosilicate (CPS) putty for hydraulic sinus membrane elevation. The simplified minimally invasive antral membrane elevation technique is based on the application of hydraulic pressure via a viscous bone graft that acts as an incompressible fluid. In this retrospective study, 21 patients (mean age: 48.5 ± 12 years) consecutively treated with the simplified minimally invasive transalveolar sinus elevation technique were evaluated. 28 tapered implants we

Clinical use of ridge-splitting combined with ridge expansion osteotomy, sandwich bone augmentation, and simultaneous implantation.

Our aim was to describe and evaluate the outcome of ridge-splitting and simultaneous implantation combined with ridge expansion osteotomy and sandwich-bone augmentation in the aesthetic zone. Thirty-one patients aged from 21-55 years who presented with narrow edentulous ridges (2.88∼5.08mm) were treated by ridge-splitting together with ridge expansion osteotomy and sandwich-bone augmentation to correct the osseous deficiency for simultaneous implantation. Bicon(®) implants were used. Calipers were used for biometric evaluation of the width of the ridge at both the first and second operations.

Immediately loaded platform-switched implants in the anterior mandible with fixed prostheses: a randomized, split-mouth, masked prospective trial.

BACKGROUND: Platform-switched implants have been demonstrated to maintain marginal bone-level stability after immediate loading. The present study evaluated crestal bone loss and soft tissue stability around ANKYLOS plus® implants (A-implants) and Certain® PREVAIL(TM) (B-implants). MATERIALS AND METHODS: Patients were identified to receive three A- or three B-implants on each side of their mandibles, with randomization. All implants were loaded immediately after their insertion and splinted with a cemented provisional prosthesis. Final prostheses were delivered 3 months after implantation. Pe

Analysis of bone formation after sinus augmentation using β-tricalcium phosphate.

Implant placement in the edentulous maxilla often represents a clinical challenge due to insufficient bone height after crestal bone resorption and maxillary sinus pneumatization. Several graft materials have been evaluated for augmenting the maxillary sinus to compensate for the lost vertical dimension. Allografts are readily available without the risk of disease transmission and the need for a second site surgery. The aim of this case series was to systematically evaluate the development and maturation of augmented bone in the maxillary sinus using beta-tricalcium phosphate. In 21 to 40 week

Cone beam computed tomographic evaluation of a maxillary alveolar ridge reconstruction with iliac crest graft and implants.

The present article discusses an atrophic maxilla reconstruction with iliac crest bone block and particulate grafts and dental implants. Onlay block grafts were used to restore bone volume of the anterior maxilla, whereas bilateral sinus floor augmentation was performed using a particulate graft. Ten months after the grafting surgery, 9 dental implants were placed to rehabilitate the case. Results of a 7-year follow-up were obtained clinically and by cone beam computed tomographic images.