Werner BÄHR

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One hundred and five patients were investigated for functional and aesthetic impairments following treatment of orbital trauma through subciliary, mid-lower eyelid, or infraorbital incisions. The progress of impairments with time was assessed, and the merits and shortcomings of each of the three approaches were established. The results showed that(More)
The soft tissue covering most of the midfacial skeleton is relatively thin. On account of this plates and screws of the 2 mm systems used in the osteosynthesis of this region can bulge and/or be palpable through the thin integument. This shortcoming has prompted the need to develop smaller systems. The present study was designed to investigate whether these(More)
  • W Bähr
  • Journal of cranio-maxillo-facial surgery…
  • 1989
The effects of pre-tapping on the AO miniscrew-midface bone interface were investigated in 140 methacrylate-fixed human cadaver specimens. An adequate contact was found in all 40 self-tapped and in 68 out of 100 pre-tapped samples. Since inadequate contact was found in the remaining 32 specimens from the pre-tapped group, it was concluded that the(More)
The most frequently tested biodegradable osteosynthesis materials have up to now largely consisted of poly-L-lactide (PLLA). The PLLA polymers appear to have sufficient mechanical strength for fracture treatment in the midface, but their degradation does not seem to be uniform enough to allow their clinical use. During the degradation process the(More)
In most cases, surgical management of craniofacial fractures involves correction of occlusion. This requires nasal intubation. In the case of frontobasal fractures with simultaneous cerebrospinal fluid (CSF) fistula, nasal intubation is thought to increase the risk of meningitis. An analysis of the records of 160 patients with frontobasal fractures and CSF(More)
PURPOSE Microvascularized fibula transplants have become established in reconstruction of the mandible. However, because of the limited diameter of the fibula compared with the height of the mandible, the vertical distance between the reconstructed segment and the occlusal plane can be substantially large. This is a particular problem in nonatrophic or(More)
  • W Bähr
  • Journal of oral and maxillofacial surgery…
  • 1992
The so-called emergency screws are designed for use in a drill hole where the conventional screw has failed following a stripped bone thread. It is not known, however, if these screws are as well anchored in bone as cortical screws, nor is it known how well they secure contact to the previously damaged screw bed. On the basis of torque measurements in(More)
With the assistance of computed tomography, the bone volume in the symphysis was assessed on 28 historic mandibles with mixed dentition, before the eruption of the canines. The quantification gave an average bone volume of 1.0 cm3, and the values fitted a normal distribution curve. Assuming that there were no appreciable differences in size between the(More)
  • W Bähr
  • Journal of cranio-maxillo-facial surgery…
  • 1998
When vascularized fibula grafts are used in mandibular reconstruction, it is often necessary to divide the graft into segments so as to follow the mandibular curvature. The periosteal blood supply to the segments is usually sufficient. It is unclear, however, how short the segments can be without compromising the blood supply. The present study sought to(More)
  • W Bähr
  • International journal of oral and maxillofacial…
  • 1990
Better contact between AO miniscrews and the bone and greater resistance against torque are achieved in the human midface if the thread is not pretapped. This was demonstrated by 60 methacrylate fixed human midfacial bone sections and by 100 torque measurements. It is concluded that pretapping is not to be recommended in the thin bone of the midface.