Bone scintigraphy: an aid in deciding on the extent of bone resection in malignant oral tumors.

Purpose: The decision of whether to perform continuity-sparing or resecting surgery of the jaw in cases of malignant oral tumors is often difficult.

Patients And Methods: To aid in this decision, bone scintigraphy was evaluated retrospectively in 304 patients with a squamous cell carcinoma.

Results: One hundred forty-five patients showed no accumulation of the radionuclide, and none of them had infiltration by tumor histologically.

Prognostic significance of DNA ploidy in oral squamous cell carcinomas. A retrospective flow and image cytometric study with comparison of DNA ploidy in excisional biopsy specimens and resection specimens, primary, tumors, and lymph node metastases.

Deoxyribonucleic acid ploidy was determined in paraffin-embedded tumor tissue from 116 patients with primary oral squamous cell carcinomas (including 5 carcinomas of the lip and 14 of the tongue) by means of flow cytometry. One hundred six cases were suitable for evaluation (91%). Sixty-eight percent of the cases (n = 72) showed a nondiploid nuclear DNA content.

[Indications for 76 free surgical flaps for mandibular reconstruction].

Since 1985 76 revascularized osseous and osseocutaneous flaps collected from different donor sites were transferred. The overall rate of success amounted to 94.7%, 48.

A modification of the Sanvenero-Rosselli velopharyngoplasty.

A modification of the cranially-pedicled velopharyngoplasty is described. It consists of the preparation of two mucosal flaps on the dorsal side of the soft palate. They are pedicled on the velar rim and sutured to the free part of the pharyngeal flap between its origin and the recipient bed.

[Radioactive burden resulting from zirconia implants].

Due to its mechanical properties circonia is an interesting implantation material. However, it may contain a certain amount of radioactive isotopes. The measurement of alpha-emission reveals varying amounts of radiation.

[The accuracy of soft tissue profile prediction with the "Dentofacial Planner" in skeletal prognathism].

30 pre- and postoperative lateral cephalograms of patients with mandibular prognathism are used to evaluate the soft tissue profile prognosis given by the "dentofacial planner". As a result, the horizontal displacement of SLS (sulcus labrale superius) and Pg' (soft tissue pogion) in patients with a normal vertical dimension and additional LMF (labiomental fold) in persons with a marked overbite are calculated well. The horizontal changes of the other points analyzed as well as all vertical changes are not predicted satisfactorily in the momentary version 4.

[Computer-supported cleft lip and palate documentation].

In the interdisciplinary treatment of cleft lip and palate patients large data sets are compiled, the storage and management of which seems to be most appropriately done by a computer system. An efficient and PC-compatible system is introduced which features simplicity of use, clearness of structure and suitability for clinic and practice.

The importance of preoperative digital subtraction angiography in microsurgically reanastomosed tissue transfer.

The importance of preoperative digital subtraction angiography (DSA) in revascularized tissue transfer in the maxillofacial area is demonstrated on the basis of 53 flaps: In 7 cases DSA revealed results which influenced the therapeutic procedure. Compared to conventional methods of vascular diagnosis, DSA has considerable advantages.

[Predictability using the "Dentofacial Planner Version 4.22 A" of soft tissue changes following adult orthodontic treatment].

For the prediction of profile changes following orthodontic treatment the computer program "Dentofacial Planner" (DFP) which bases on cephalometric measurements is available. The object of this study is to analyse the precision of the DFP version 4.22 A (release Feb.

[Modified vise for shaping free reanastomosed bone grafts].

A modified vise allowing easy handling and safe performing of bone grafts is described. Experience has shown it to be a valuable tool for handling microsurgically reanastomosed bone grafts, because the essential nutritive zones, the vascular and soft tissue areas, are protected from mechanical damage. Thus, even multiple osteotomies can be safely and easily performed.

[Organ specific deposition of 45Ca labelled calcium phosphate ceramic material].

Research work using easily resorbable HA- und TCP-ceramics does not give any proof for pathologic deposition in different organs. Based on current information, there is no objection against the clinical use of HA-ceramics.

[Maxillofacial injuries in polytrauma. Results of a follow-up study].

Evaluation of the clinical charts of 86 patients with polytrauma, accompanied by fractures of the facial skull, and reexamination of 48 of these patients showed that with adequate therapy the concomitant lacerations do not influence the results of orofacial treatment. The complexity of the anatomical structures and of their functions necessitates early, differentiated, and interdisciplinary treatment. The special aspects and problems are presented and discussed.

[Application of granulate hydroxylapatite for mandibular augmentation].

The already known surgical interventions for absolute induction of extensive mandibular atrophy, cannot be suggested as routine standardized methods. Use of Hydroxylapatite-ceramic for restoration of the atrophic alveolar process, shows several advantages; among those, simplicity of the operation use of local anesthesia, as well as very low percentage of unsuccessful interventions are taken into consideration. The clinical results of 102 cases are shown and discussed.

[Augmentation of severely atrophied jaws with hydroxyapatite from a prosthodontics standpoint].

After 4 years of routine application of hydroxylapatite ridge augmentation 109 patients underwent a posttreatment examination. The quality of the alveolar ridge and the denture as well as the functional status of the craniomandibular system were evaluated in detail. For the maxilla good results were obtained in 80-90%, for the mandible in 70-80%.

[Role of microsurgically revascularized flaps in the treatment of radionecrosis of the mandible].

In spite of advances in radiation therapy of malignant tumours, osteoradionecrosis cannot always be prevented. This form of therapy causes problems particularly in reconstruction of the mandible. Seven cases are presented, and the advantages of microsurgically revascularized tissue transfer (over other methods of treatment) are pointed out and discussed.