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Biomedical subjects

N Hardt

Publications and source records attributed to N Hardt.

At least 37 records · Page 2Linked to original sources
PubMed1995

[Effect and sequelae of supernumerary tooth in the premaxilla].

Although uncommon, anterior maxillary supernumerary teeth (mesiodentes) are the most frequent supernumerary teeth. A disturbed or delayed eruption of the adjacent permanent incisors may be due to a mesiodens and should lead to a further radiographic examination. In some cases the exact radiographic location of the mesiodens may prove difficult. The surgical removal of mesiodentes is especially difficult in extreme cranial displacement. The records of 90 patients with 113 mesiodentes are discussed with special reference to their degree of retention, topographical location, width of pericoronal space and surgical removal, and incidence of retention and malposition of the adjacent permanent incisors, respectively.

Adolescent↗
PubMed1995

[The resistance spectrum and antibiotic therapy in progressive infections in the mouth, jaw and face areas].

Assessing the surgically treated progressive abscesses of the head and neck from 1991 to 1993 at our clinic of maxillofacial surgery, a surprising percentage of the microbiologically isolated germs showed resistance against the recommended antibiotics of first choice. The location of the abscesses, the microbiological spectrum and the clinical course are analysed and compared with the literature. Preventing possible severe complication of progressive abscesses of the head and the neck an additional parenteral antibiotic therapy in high doses combined with the surgical treatment is recommended. Common dentoalveolar infections without progressive tendency are sufficiently treated surgically without administration of antibiotics.

Abscess↗
PubMed1994

[Temporomandibular joint fractures in children. A clinical and radiological follow-up in 30 patients].

Disturbances of facial growth, occlusion and temporomandibular joint function respectively are all possible sequelae of condylar fractures in children. In this study 30 children (age at accident from 9 months to 14 years, mean 6 years and 9 months) were reexamined who had sustained conservatively treated condylar fractures. Dysfunction and disturbances within the stomathognathic system were assessed by a clinical and radiographic examination. The mean interval between the accident and the follow-up study was 4 years and 11 months. The maximal interincisive distance was always better than 35 mm. The "en face" analysis revealed 6 cases with an inclined occlusion plane referring to the horizontal plane. Only 3 patients, all with bilateral condylar fractures, showed a restricted mandibular mobility. Remodelling of the condylar head was very good in 77% of the cases. In the frontal plane, 21% of the unilateral cases and 33% of the bilateral cases respectively had a persistent medial inclination of the condyle. The measured difference in length of the processus articularis showed the highest correlation to the previous condylar fracture. The radiological evaluation after Ricketts (1960) and Mulick (1965) to assess facial asymmetry revealed six cases (20%) with a relevant angle difference of more than 5 degrees.

Adolescent↗
PubMed1994

[Results of various reconstructive procedures in defects of the fronto-facial area].

Small calvarial defects may be recontoured by Gore-Tex membranes or by micro burr hole covering plates in combination with bone dust. In extended defects the best primary and secondary results are obtained with splitted calvarium grafts due to their stabilizing and esthetic features. Micromeshes prevent contour disturbances in the contact zone of the transplants.

Bone Transplantation↗
PubMed1993

The treatment of mandibular fractures in children.

92 children with mandibular fracture were treated at our hospital between 1980 and 1989. Distribution and treatment of the fractures focus on a new classification based upon the stage of the dentition, site of the fracture and displacement of the tooth-bearing part of the mandible. The treatment rationale includes intermaxillary fixation by specially designed mini-arch bars with acrylic resin stiffening in cases with undisplaced fractures in the early stages of the dentition. With the help of this technique, invasive procedures for fracture immobilization become less common. The indication for miniplate osteosynthesis is limited to displaced or multiple fractures of the tooth-bearing part of the mandible. The combination of miniplates and monomaxillary splinting with mini-arch bars allows a shorter duration of intermaxillary fixation and hence early functional treatment of additional condylar fractures. Correctly applied miniplates neither injure the tooth germs nor lead to growth disturbances of the mandible. The classification and treatment of mandibular fractures in children are discussed.

Bone Plates↗
PubMed1991

[Reconstruction of extremely atrophic maxilla. Operation technique and results].

A ridge augmentation procedures for extremely atrophied upper jaws is presented. Compared with the use of a bone graft alone, the permanent integration of a titanium mesh reduces the loss of vertical dimension by resorption to a minimum. This is confirmed by the results of three reconstructed ridges that were followed up for four years. The indications and the technical procedure are discussed in detail.

Adult↗