Biomedical subjects

B Hohlweg-Majert

Publications and source records attributed to B Hohlweg-Majert.

3 recordsLinked to original sources

PubMed2005

Significance of osteoporosis in craniomaxillofacial surgery: a review of the literature.

Osteoporosis is a common problem in orthopedic surgery. The purpose of this review of the literature was to examine whether osteoporosis is also an important factor in patient treatment in the field of craniomaxillofacial surgery. Emphasis was given to the consequences of osteoporosis for the maxilla and mandible, the influence of osteoporosis on fracture treatment, the use of dental implants, the importance of soft tissues and the effect of osteoporosis therapies. It was found that osteoporosis does affect the bones of the skull. The effect of osteoporosis on treatment, however, is controversial and necessitates better ways of quantifying bone loss. Large inter-individual and site-specific differences in bone density, as well as other effects such as removal of teeth, periodontitis, implant insertion, augmentation procedures and altered loading with dystrophic consequences need to be considered in future studies. Special attention should be given to osteoporosis during fracture treatment.

Alveolar Bone Loss↗

PubMed2005

Navigational maxillofacial surgery using virtual models.

Ablative tumor surgery and orbital and midface reconstruction, as much as orthognathic surgery, requires detailed planning using computed tomography (CT) or magnetic resonance imaging (MRI). These techniques also allow simulation of complex surgeries preoperatively. Proper reconstruction depends on reliable information to choose the correct type of grafts and to predict the outcome. This study evaluates the benefit and indications of computer-assisted surgery in the treatment of 107 patients who underwent craniomaxillofacial surgery. Based on a CT or MRI data set, an optical navigation system was used for preoperative planning, intraoperative navigation, and postoperative control. Surgery could be preoperatively planned and intraoperatively navigated. Preoperatively, it required that soft and hard tissues were measured using the mirrored data set of the unaffected side; the size and location of the graft were chosen virtually. Intraoperatively contours of transplanted tissues were navigated to the preoperatively simulated reconstructive result. Computer-assisted treatment was successfully completed in all 107 cases. Preoperatively outlined safety margins could be exactly controlled during tumor resection. Reconstruction was designed and performed precisely as virtually planned. Image-guided treatment improves preoperative planning by visualizing the individual anatomy, outlining the intended reconstructive outcome, and by objectifying the effect of adjuvant therapy. Intraoperative navigation makes tumor and reconstructive surgery more reliable by showing the safety margins, saving vital structures, and leading the reconstruction to preoperatively planned objectives.

Adolescent↗

PubMed2003

[Epidemiological data of patients with sudden hearing loss -- a retrospective study over a period of three years].

In this retrospective study data of 257 patients (11- 6 years; 52 % male, 48 % female) admitted during the last three years for treatment of sudden unilateral hearing loss are statistically evaluated. No correlation with coexisting disease like hypertension, coronary heart disease, hypercholesteremia, arthropathy of the cervical spine, diabetes, thyroid disorders or nicotine abuse were evident. In 194 patients (75 %) total remission was achieved after rheological therapy. Patients additionally treated with steroids had a significant better outcome. Younger patients had higher remission rates. The best prognosis was found for patients with hearing loss in the lower frequency range. There were no differences in remission rates for patients with preexisting sensorineural hearing loss or chronic otitis media. Also patients suffering from recurrent episodes of sudden hearing loss had a similar outcome also.

Adolescent↗