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A 15-Year Study of Osseointegrated Implants in the Treatment of the Edentulous Jaw
Published in Niall MH McLeod, Peter A Brennan, 50 Landmark Papers every Oral & Maxillofacial Surgeon Should Know, 2020
A two-stage surgical procedure was performed. For both the mandible and the maxilla, six titanium implants were placed. Locations with sufficient bone were identified by explorative drilling. The different steps of drilling and implant insertion were described in detail. Healing time was 3–4 months in the lower jaw and 5–6 months in the upper jaw. After the healing period, an abutment operation was performed. The prosthetic treatment started 2 weeks after placing the abutments. Screw-retained bridges with a gold framework and acrylic occlusal and incisal covering were placed.
Radiosurgical Techniques
Published in Jeffrey A Sherman, Oral Radiosurgery, 2020
The use of implants to replace missing teeth has become an accepted alternative to the construction of a fixed bridge. The tissue that grows into position around the healing cap of the implant often needs to be removed prior to placement of the implant abutment and crown as well. Radiosurgery can be used to effectively remove the soft tissue and create a trough for ease of crown cementation. Exposure of an implant should only be performed with high-frequency radiosurgery of 4 MHz. The lower-frequency instruments of 1.0–3.8 MHz have been shown to produce increased lateral heat to the surrounding tissue. Radiosurgical instruments equipped with a frequency of 4 MHz are recommended for soft tissue removal around implants for optimum safety and esthetic results.
3D analysis of rest seats in clinical environment
Published in J. Belinha, R.M. Natal Jorge, J.C. Reis Campos, Mário A.P. Vaz, João Manuel, R.S. Tavares, Biodental Engineering V, 2019
M. Pimenta, F. Araujo, T. Marques, P. Fonseca, A. Correia
The forces transmitted from the prosthesis to an abutment tooth are directed apically down the long axis of the tooth so that stress can be absorbed by the fibers of the periodontal ligament without damaging it or the supporting bone. (Phoenix, Cagna, and DeFreest 2008).
Carbon fiber-reinforced PEEK in implant dentistry: A scoping review on the finite element method
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2021
Júlio C. M. Souza, Sofia S. Pinho, Maria Pranto Braz, Filipe S. Silva, Bruno Henriques
Thus, dental implant systems are currently available within single- or multiple pieces depending on the materials and clinical applications (Mattila et al. 2009; Santiago et al. 2016). A screw component can be an extension from the titanium abutment for connection into the endosseous implant (two-pieces) or a third component to connect abutment (post through bolt) and the endosseous implant. The implant-abutment connection has been developed as external hexagonal, internal hexagonal, or Morse taper (Santiago et al. 2016; Nimbalkar et al. 2020). Among the current implant-abutment connections, Morse taper exhibit proper stress distribution from occlusal loading through the endosseous implant and surrounding bone (Santiago et al. 2016; Bataineh and Al Janaideh 2019; Nimbalkar et al. 2020). The selection of the implant abutment is a clinical step of major importance concerning aesthetics outcomes, corrosion resistance, elastic modulus, strength, biocompatibility, and peri-implant healthy state maintenance (Parmigiani-Izquierdo et al. 2017; Kaleli et al. 2018). Abutments can be manufactured as standard (straight or angled) or custom-made design (Schwitalla and Müller 2013; Najeeb et al. 2016; Schwitalla et al. 2016). Custom-made and angled abutments are indicated to balance the positioning of the implant systems regarding the maxilla-mandible relationship. Custom-made abutments provide accurate positioning and optimization of stress distribution (Schwitalla and Müller 2013; Najeeb et al. 2016; Schwitalla et al. 2016).
An open, randomised, multi-centre study, comparing straight and tapered apex implants design, in partially and totally edentulous maxillae
Published in Acta Odontologica Scandinavica, 2021
Carl-Johan Ivanoff, Jonas Lindhe, Stefan Ellner, Karl Johan Johansson, Peter Abrahamsson
For both groups there were only minor marginal bone loss as measured from loading to one-year follow-up. The results are in line with previous studies [19–21]. There was no statistically significant difference between the test and control implants. A finding indicating that the tapered apical design did not exert any deleterious effect on the marginal bone. The tapered apical design can facilitate implant placement between adjacent natural teeth with limited inter apical space or in areas where the insertion of a cylindrical implant would lead to perforation of the buccal bone plate. However, missing data were present in both groups on implant and subject level, four to five times higher in the test group. Missing data may not mean absence of disease. Hence, the results must be interpreted with caution. The stable marginal bone conditions may be due to the conical design of the abutment-implant connection. It has previously been shown that this type of connection exerts a favourable load transfer to the marginal bone and prevents leakage of bacteria in the abutment-implant zone [22,23].
Design optimization of implant geometrical characteristics enhancing primary stability using FEA of stress distribution around dental prosthesis
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2021
Sameh Elleuch, Hanen Jrad, Amir Kessentini, Mondher Wali, Fakhreddine Dammak
The boundary conditions were prescribed to the side edges of the model, to restrict the translational and rotational displacements, which also models the connection to the rest of mandibular bone according to (Lin et al. 2009). The dental implant is subjected to two simultaneous external loading, to simulate masticatory forces of 17 and 100 N, respectively, in lingual and axial directions (Lian et al. 2011; Uzcátegui et al. 2015; Zhang et al. 2016; Ueda et al. 2017). Perfectly bonded property is assumed between the implant and the bones: (osseointegrated contact between the implant and the bones), as depicted in Figure 1. The interfaces between the native teeth, the cortical and cancellous bones are treated as perfect bonding. The prosthesis–abutment interface is considered as bonded (Kong et al. 2008). The contact between the bones tissues and the implant is considered by contact elements and it is modeled as the frictional contact. The surface texture of the implants is considered in the analyses by including a Coulomb frictional interface with a coefficient of 0.28.