PubMed HealthSearch

Biomedical subjects

G Iannetti

Publications and source records attributed to G Iannetti.

At least 19 recordsLinked to original sources

Surgical strategies in the treatment of symptomatic osteomas of the orbital walls.

We present a series of 19 surgically treated osteomas involving the orbital walls. Eight were localized at the junction of the frontal sinus and orbital roof, three were frontoethmoidal, two were of the orbital roof, one of the lateral wall, one of the orbital floor, and four involved all the walls of the orbit and were termed panorbital. All tumors at the junction of the frontal sinus and the orbital roof as well as those originating from the orbital roof proper were removed by frontal craniotomy. In the three that were frontoethmoidal, osteotomies were performed. Lateral and inferior orbitotomies were done when the corresponding orbital walls were affected. The four panorbital osteomas required large frontotemporal craniotomies in association with superolateral orbitotomy and zygomatic and/or malar osteotomy, when necessary. Satisfactory cosmetic and functional results were obtained in all but two cases of panorbital osteomas, in which the neurological deficit worsened after surgery. We discuss the choice of the various approaches described, with reference to the relevant literature.

Adult

Syndromes associated with simple calvarial and complex craniofacial anomalies.

Central nervous system (CNS) development is a complex process of predetermined events that must occur in an ordered sequence to ensure normal ontogenesis. Various critical steps take place in a relatively short time (from the first few days to the first months of gestation). Both genetic and environmental insults may produce morphological defects. Early defects often result in nonviable embryos; later, complex craniofacial anomalies, mainly associated with brain damage, may be observed. The pathogenesis of congenital malformations is heterogeneous; sporadic cases are reported as well as recessive or dominant inheritance and chromosomal aberrations. Some of these syndromes have been identified as contiguous gene syndromes; the role of critical chromosomal regions and homeobox genes is discussed. Furthermore, these conditions present difficulties in regard to early diagnosis, surgical repair, and social impact.

Brain Diseases

[Magnetic resonance in condylo-meniscal incoordination pathology of the temporomandibular joint. Indications, diagnostic accuracy and optimization of study techniques].

Up to 28% of the population is affected with pathologic conditions involving the temporo-mandibular joint (TMJ), most of them related to uncoordinated disk motion. To date, these pathologies have been evaluated by means of different diagnostic tools, the latest of which is MR imaging. The authors examined with low-field (0.2 T) MR imaging 15 normal volunteers and 20 patients suffering from temporo-mandibular joint disk dysfunction. The study was aimed at comparing the results obtained with low-field MR imaging with literature data on the subject. A standard technique employing low-field MR imaging was also assessed on normal subjects for the management of the patients with TMJ pathologies. The pathological TMJs were then evaluated, each of them examined with arthroscopy and/or surgery. MR imaging was capable of identifying the meniscus in all cases, together with its morphology, signal, location, and movements during opening and closure of the mouth. Disk dislocation were always correctly identified. The point of re-capture in the cases with spontaneous reduction was easily ascertained. The simultaneous imaging of both the right and the left TMJs allowed the joints to be compared at the same degree of mouth opening, so that motion asymmetries were easily detected. High agreement was observed between MR, arthroscopic and surgical findings. Our experience points to MR imaging as the examination of choice in the evaluation of TMJ diseases. The best results are obtained when both joints are simultaneously imaged, on the sagittal and coronal planes, during opening and closure of the mouth, and possibly in a cine-animation display format.

Arthroscopy

A new condyle.

Explore the source record for details and available documents.

Ankylosis

Condylar hyperplasia: cephalometric study, treatment planning, and surgical correction (our experience).

We have studied and treated 12 selected cases of condylar hyperplasia. All of our cases showed no clinical or instrumental sign of still active hyperplastic growth of the mandibular condyle. The cephalometric studies demonstrated in all cases a pathologic vertical growth of the maxilla interesting the posterior segments on the same side of the hyperplastic condyle. We decided not to perform a condylectomy because we did not expect the condyle to grow any further. The treatment consisted of Le Fort I osteotomies and sagittal split osteotomies sometimes in combination with genioplasty and mandibular remodeling. The mandibular physiologic movements were preserved in all cases.

Adolescent

[Diagnosis and therapeutic programming of mandibular symphysis dysmorphisms in patients with dento-osseous malformations].

Alterations in chin position in dentoskeletal dysmorphias are considering with a review of the literature on the prognosis of surgical treatment in dysmorphias of the chin symphysis. The treatment protocol then presented offers the possibility of programming the restoration of the correct physiological relationship between the bone bases and the correction of the aesthetic defects produced by dysmorphias of the chin symphysis on a single pre-operative graph. The problem in such programming lies in the extensive changes necessary to the bone and skin parameters during the functional operation that are difficult to foresee and quantify preoperatively.

Chin

Five-year follow-up of Le Fort I osteotomies.

The outcome of a five-year radiographic follow-up study of 150 patients with maxillo-mandibular malformations who had undergone Le Fort I osteotomy of the maxilla is reported. A superimposition technique made possible an exact evaluation of the adjustments effected. The results confirm the validity of a study conducted in 1977 and the five-year stability of the maxilla. The importance of the relationship between the Frankfort plane, occlusal plane and the osteotomy line is emphasized. In operations in which Le Fort I osteotomy of the maxilla is combined with a sagittal osteotomy of the mandible the maxilla undergoes minute displacements in the weeks following surgery, which can easily be predicted and allowed for at the planning stage. The long-term stability of the maxilla is assured.

Adolescent

The use of lyophilized dura in reconstruction of the orbital floor.

The results and experiences with the use of lyophilised human dura in 52 cases are reported. Experimental work carried out on rabbits demonstrate that human lyodura is replaced by a layer of connective tissue. Both, the results of animal experiments as well as those experienced in 52 clinical cases suggest that lyodura is an excellent material for the reconstruction of defects of the orbital floor.

Adolescent

Acid-base equilibrium in Menière's disease.

57 patients suffering from Meiere's disease have been examined: metabolic alkalosis has been found in 39 and metabolic acidosis in 4. Electrolytes (Na, K and Cl) were normal. Among the 31 subjects in the control series a slight metabolic alkalosis qas detected only twice. Follow-up of several patients, from one to three years, resulted in a realization of a parallel between metabolic disturbance and Meniere symptoms. A provocation test, by sodium bicarbonate oral administration, has beem attempted twice: in both instances alkalosis did increase strongly but, only once, vertigo was elicited. Meniere patients found in alkalosis were given acidifying drugs to normalize their acid-base equilibrium. Such treatment proved effective in preventing acute cochleo-vestibular crises and in improving tinnitus and deafness (in the fluctuating stage). On the interruption of treatment symptoms reappeared. The physiological-pathological significance of metabolic alkalosis in Meniere's disease still remains unclear and, consequently, this can be considered merely a predisposing factor in endolymphatic hydrops.

Acid-Base Equilibrium