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Biomedical subjects

M Dehen

Publications and source records attributed to M Dehen.

11 recordsLinked to original sources
PubMed1991

[Treatment of dental trauma in childhood with particular consideration of splint therapy].

Injuries to the periodontium as well as to the crowns and roots of teeth are the most common results of traumatic insults in childhood. The main problem in the fixation of luxated teeth is associated with the state of dentition and the anatomy of the deciduous and permanent teeth. In a clinical follow-up examination the quality of several splints for treating luxated teeth was evaluated. We observed that some acrylic cap splints showed marked mechanical faults and poor fit. Modification of the Construction technique could eliminate such problems.

Child↗
PubMed1991

[On differential indications for endosseous implants and autologous tooth transplants for single posterior tooth loss].

A therapeutic alternative in treating the loss of single teeth, the treatment with implant-borne crowns or autologue transplantation of teeth is gaining increasing importance in clinical dentistry. Both surgical techniques were demonstrated, and the authors tried to differentiate the ranges of indications for endosseous implants and autologue transplantation of teeth.

Adult↗
PubMed1990

[Evaluation of the hemostyptic properties of a collagen preparation].

In vitro tests were carried out to determine whether the haemostyptic properties of a collagen monomer were lost during the manufacturing process. An increased recalcification time and thromboplastin time as well as failure of the thrombocytes to adhere to the collagen fibres were observed. This indicates that blood coagulation can be attributed only to mechanical irritation of the blood corpuscles and not to the properties of the collagen molecules.

Collagen↗
PubMed1990

[Mechanical properties of collagen or gelatine-stabilized blood clots].

Mechanical properties of blood clots stabilized with collagen (Pentapharm) and a gelatine (Gelastypt-M) sponge were compared with the help of thrombelastography and volumetric tests. The collagen songe was distinctly inferior to gelatine in stabilizing the clot against retraction. It appears that gelatine is a better material for filling large osseous defects that are subjected to mechanical stress.

Animals↗
PubMed1989

Modified acrylic cap splint for dento-alveolar fractures.

A modified method of constructing an acrylic cap splint is introduced. The splint is made from wax and is then replaced by acrylic. The splint has a uniform thickness and is therefore suited for maintenance of a proper occlusion.

Alveolar Process↗
PubMed1989

[Integration of pyrolized bone graft material in major bone defects].

In a clinical post-treatment evaluation during the past 3 years the wound healing of bone defects after substitution with a pyrolized xenogenic bone graft was observed in 90 patients. In most cases we found that wound healing was impaired and that the material did not show any osteointegration. As a result, inflammatory reactions of the bone with loss or demarcation of the bone graft occurred. Although some authors have reported a stimulation of osteogenesis after implantation of pyrolized bone graft, we cannot confirm their view.

Alveolar Process↗
PubMed1989

[Insertion of collagen matrix into open bony defects].

The use of collagen as a bone substitute was examined in a clinical study involving 70 patients. In a standardized operation impacted mandibular third molars were removed simultaneously. Collagen fleece was implanted in one osseous defect while the other defect was packed with iodoform gauze. Postoperative pain, swelling and complications were analyzed. There were significant differences between the two methods. The use of collagen fleece to obturate bony defects following surgical removal of impacked molars appeared to be of no advantage. On the contrary, there was a considerably higher rate of postoperative bleeding and complications. This could probably be related to the poor stability of the implanted material.

Adult↗
PubMedDate not supplied

[Comparison of the mechanical properties of resorbable bone substitutes].

The mechanical properties of blood clots stabilized with collagen, gelatine and alginate sponges were compared with the oid of thrombelastography and volumetric tests. The collagen sponges were distinctly inferior to gelatine and alginate in stabilizing the clot against retraction. There was no evidence of any interaction between collagen and blood clot.

Alginates↗