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F Boutault

Publications and source records attributed to F Boutault.

52 records · Page 3Linked to original sources
PubMed1989

Evaluation of gingival microcirculation by a laser-Doppler flowmeter. Preliminary results.

Up to now, only qualitative studies have been performed on gingival microcirculation whereas quantitative methods have been used in animal experiments, by the injection of microspheres for instance. The authors had the opportunity of using a Laser-Doppler Flowmeter (LDF) which had already served to explore the cutaneous microvascular blood flow. At first, it was necessary to modify an occlusal splint for good immobilisation of the probe on the gingival mucosa. Then they made a study on twenty healthy students with measurements of red cell velocity in superficial maxillary gingival mucosa. Each subject was tested twice at an interval of one-month. A statistical analysis shows very good reproducibility of the tests, especially for the pulsative velocity, despite a rather high variability between the subjects. The haemodynamic parameters (heart rate, systolic or diastolic blood pressure) do not seem to have a significant influence on the values obtained. The LDF is a very good instrument for the evaluation of gingival microvascular flow, as has been demonstrated for cutaneous microcirculation. A wide range of applications can be considered for this sensitive and harmless technique.

Adult↗
PubMed1989

[The value of miniature compression screws in maxillofacial surgery].

According to the well-known principle of compression, a new kind of screw has been developed. It is a development of the miniaturized Michelet-Champy osteosynthesis device which we have used for the last 10 years in maxillofacial surgery. These traction-screws were initially elaborated for rigid stabilization after sagittal ramus osteotomies such as Obwegeser-Dal Pont. Usually, three screws are inserted at each side, via a transjugal approach. It is then possible to remove the intermaxillary fixation device at the end of the surgical procedure. However, these screws are also useful in other cases: for other kinds of mandibular osteotomies (visor osteotomy for instance), in traumatology (oblique mandibular or condylar fractures) or for fixation of onlay bone grafts on the facial structures. When iliac bone grafts, which are essentially cancellous bone are used, it is possible to use a small metallic ring to avoid penetration of the head of the screw into the graft. The screws can be inserted by a cutaneous punctiform incision when it is impossible to pass the screwdriver through the buccal incision. In all cases, this material is particularly easy to insert, allows good fixation, permits a solid interosseous compression, and is particularly well tolerated. The main drawback is the difficulty of choosing the right length of the screws because only two lengths are available at the present time. Despite this problem, these mini traction-screws seem to be useful for maxillofacial surgeons.

Bone Screws↗
PubMed1988

[Modifications in the vertical position of the stomion in facial osteotomies and osseous genioplasties].

A retrospective statistical analysis is made on 45 patients who have undergone a facial osteotomy. The authors study the vertical changes of the stomion on pre- and post-operative lateral cephalograms. Considering the bad initial results, it has been necessary to create subdivisions on the surgical procedure and to work on homogeneous groups. The results of this study led to the following conclusions: the stomion follows the vertical displacement of the maxilla on an approximative ratio of 1/3, with rather great variations between the subjects; the functional osseous genioplasties, specially with vertical displacement, are not accompanied by significant vertical changes in the position of the stomion. Furthermore, it is obvious that it is necessary to use a "multivariable" method for a better prevision of the cutaneous changes after facial osteotomies, specially for the lips. Indeed, vertical soft tissue changes are the result of the interactions of many vertical and horizontal surgical squelettal displacements.

Adult↗
PubMed1987

[Transjugal osteosynthesis by compression miniscrew in sagittal ramus osteotomy].

The transjugal osteosynthesis technique of the Obwegeser-Dalpont type is used for treatment by sagittal osteotomy of ascending rami. The material used is a direct compression mini-screw derived from that described by Michelet-Champy. Principles underlying all types of osteosynthesis (rigidity, solidity, miniaturization, according to the authors) are discussed and advantages and inconveniences of their material compared with those of other existing procedures. Two clinical cases are presented as an illustration.

Adult↗
PubMed1987

[Evaluation of the mid-term results of trident osteotomy using orthodontic goniometry].

The authors study a series of twenty patients who underwent a "trident" maxillary osteotomy for transversal deficiency. They try to have a good evaluation of the exact value of the inter-molar distance after one year, in comparison with the expected value on the plaster casts before operation. Furthermore, they measure the axial modifications of the first molar, which consists in vestibulo or linguo version. For this study, they use a simple method which is called "orthodontic goniometry" and give a great precision. The transversal augmentation seems to be quite stable, with only fifteen per cent lost in the measured intermolar distance. But there are dental axial changes in eighty per cent of the patients. The most common modification consist in vestibular inclination, without damage for the result. But in thirty per cent of the cases, a palatal inclination is observed, with deterioration of the results. This is a good reason for maintaining a palatal contention during at least six months after surgery.

Adolescent↗
PubMed1986

[Modifications to the skin profile following facial osteotomy].

Soft tissue changes resulting of maxillary and/or mandibular osteotomies need to be evaluated with a great accuracy for a better prediction of the post-operative profile. As the aesthetic result seems to be most important for our patients, it is necessary to study the relations between the displacements of characteristic cutaneous points and hard structures below, osseous or dental. Then, a retrospective statistical computerized study was performed on 45 patients who underwent facial osteotomies at least three months before. The vertical and horizontal positions of 14 osseous or dental landmarks and 16 cutaneous points were recorded. Corresponding displacements were calculated for each of these, but only six cutaneous and 9 osseous displacements were selectionned for this study. A first correlation research was made, with determination of the lineary regression equations, when it was possible. Then a multivariate study was performed for each cutaneous point, with determination of multiple regression equations. Comparison between the two methods of prediction shows a S.D. over 2 mm for the simple regression versus a S.D. of about 1 mm for the multiple regression. On the other hand, it seems that it is possible to predict the horizontal displacements with the first method without important error. But the vertical displacements cannot be evaluated with good prediction, and particulary the stomion movements. It will be necessary to consider other parameters to obtain better correlation coefficient. But it is obvious that one can join together different groups of patients for a soft tissue changes study with the same results than after separation of those. In fact, the soft tissue reactions are the same although the surgical procedures are different.

Adolescent↗
PubMed1986

[Treatment of buccal mucosa lesions with the carbon dioxide laser].

The authors report their experience of the use of the CO2 laser in oral pathology, based on 109 patients treated in 136 sessions. The indications of this type of therapy are reviewed and details of the technic and results are given. The CO2 laser is specially useful in cases of dysplasia and cavernous hemangiomas; it guarantees the quality of the intervention, and avoids post-operative discomfort for the patients. Future prospects of this method are promising.

Cheek↗
PubMed1984

[Rational surgical treatment of mandibular retrognathism].

The authors expose their approach in the surgical treatment of mandibular retrognathism. They study the anomalies in the transverse, vertical and sagittal directions. They increase the transverse size of the maxilla by the mean of an original technique ("trident" osteotomy) recently described. Also they show several technical procedures about incisions, osteotomies and osteosynthesis.

Bone Screws↗
PubMed1984

[Value of the surgical treatment of subcondylar fractures. Apropos of a comparative study of 24 cases of luxation-fractures treated by to-and-fro osteosynthesis or by active protrusive mobilization].

Regarding the bad results of the orthopaedic treatment of subcondylar dislocated mandibular fractures, the authors present a comparative study of two series of twelve patients: one (group "A") with orthopaedic treatment; the other one (group "B") with surgical treatment by "up and down" pinning via a temporal approach. The results of surgical treatment seem to be better than those of orthopaedic treatment, as it can be seen in some other papers. The choice of the surgical technique of osteosynthesis and the indications are then discussed. It seems to be necessary to improve the specific instrumentation for wider indications an better results.

Adolescent↗
PubMed1981

[Surgical reduction of facial vertical axis excess (author's transl)].

A variation is proposed in the surgical technique employed to treat facial vertical axis excess (Long Face Syndrome). The conventional osteotomy used to treat Le Fort's fracture by means of wide horizontal incisions has been modified. The excessive height of the maxilla is treated by vertical incisions united by tunnels, osteotomy of the posterior wall of the maxillary sinus using the "egg-shell" technique, contention by Champy's plates, and genioplasty to correct the constantly exaggerated height of the mandibular symphysis.

Face↗
PubMed1976

[Permanent jaw constriction of extra-articular origin].

The authors describe a new case of permanent constriction of extra-articular osseous origin. They consider the classical distinction between constrictions due to traumatism and those due to malformation (O. Jacob's disease) debatable, for this malformation is usually secondary to traumatism. They also think that the osteoma responsible for constriction may be considered a localisation of neurogenic para-osteoarthropathies.

Adult↗