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Two-stage implant systems result in gaps and cavities between implant and abutment that can act as a trap for bacteria and thus possibly cause inflammatory reactions in the peri-implant soft tissues. These gaps between the components are inevitable, and their clinical significance has so far been mostly neglected by both manufacturers and clinicians. The(More)
Insufficient bone volume can be a significant problem when placing dental implants. This clinical study was designed to evaluate bone regeneration potential at dehisced dental implant sites. Nineteen titanium dental implants with exposed threads were studied. To create a secluded space for bone formation, an expanded polytetrafluoroethylene (e-PTFE)(More)
This study presents data related to 136 patients who were treated with 300 implants in the edentulous mandible anterior to the mental foramina. Two implant systems were used: the titanium plasma-sprayed screw implant (TPS) and the intramobile cylinder implant (IMZ) in three different modifications. The longest observation time was 11 years, with a mean of(More)
The aim of our research project was to achieve an improvement in the integration of enossal dental implants in the region of peri-implantary soft tissue. Improvement in the adhesion of the gingiva of the surface of enossal implants was to be achieved by modification of the titanium surface. The effect of different modifications on the biocompatibility of(More)
  • E-J Richter
  • The International journal of oral & maxillofacial…
  • 1995
Vertical forces applied to dental implants during oral functions have not been quantified precisely. The key problem has been the lack of suitable measuring devices. This article introduces a new technique for placing a transducer directly in the implant without any increase in vertical dimension. Results were compared to loads applied to teeth. Implants in(More)
  • E-J Richter
  • The International journal of oral & maxillofacial…
  • 1998
To date, transverse and vertical forces applied eccentrically to the axis of dental implants in the molar area during oral function have not been quantified. A specially designed load cell placed directly in the implant allowed for measurements of bending moments. Results of both load directions were compared to each other and to the loads applied(More)
OBJECTIVES To investigate the potential influence of standard dental materials on dental MRI (dMRI) by estimating the magnetic susceptibility with the help of the MRI-based geometric distortion method and to classify the materials from the standpoint of dMRI. METHODS A series of standard dental materials was studied on a 1.5 T MRI system using spin echo(More)
Within a period of 36 months 103 Dicor glass ceramic crowns have been inserted. Total loss of function occurred in 8 of the restored teeth in the form of loss, partial or total fracture of the crown. In 15 cases a partial loss of function was observed due to esthetic damage, abrasions or cement washouts. Before treatment 73 teeth had been sensitive on(More)
A discussion of loads applied to implants must include the clinical consideration that not only rigid implant types are used, such as the Tübingen immediate implant and the TPS screw implant without shock absorber, but also systems with inherent resilience integrated in the implant design, such as the IMC and Flexiroot implants. The common goal of all of(More)
Natural teeth and dental implants have differing degrees of mobility thus causing a potential biomechanical problem when connected by fixed bridgework. The clinical follow-up often discloses marginal bone loss around an implant neck probably due to high stress factors. An implant with a built-in compliance resembling the tooth mobility could be advantageous(More)