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Biomedical subjects

A B Giannì

Publications and source records attributed to A B Giannì.

10 recordsLinked to original sources
PubMed2005

Anterior mandibular apical base augmentation in the surgical orthodontic treatment of mandibular retrusion.

The authors describe a surgical technique alternative to traditional pre-surgical orthodontics in order to increase the apical base in mandibular retrusion (class II, division I). This subapical osteotomy, optimizing inferior incisal axis without dental extractions and a long orthodontic treatment, associated to genioplasty permits to obtain an ideal labio-dento-mental morphology. This procedure avoids in some cases the need of a mandibular advancement and, if necessary, it reduces his entity with obvious advantages.

Chin↗
PubMed1995

Recovery of infraorbital nerve function after zygomaticomaxillary cheek pedicled flap.

The zygomaticomaxillary cheek pedicled flap (ZMCF) involves the intentional section of the infraorbital nerve to reflect the flap laterally in order to give access to the rhinopharynx, clivus and upper cervical spine. The aim of this trial was to examine the recovery of sensation of the infraorbital nerve, both quantitatively (touch sensation, localisation test, two-point discrimination) and qualitatively (sharp/blunt test, temperature sensation, pain sensitivity, dental sensitivity) in 7 patients, at least 12 months after surgery. In each patient, four cutaneous areas (lower eyelid, nose ala, upper lip, cheek) and the upper vestibulum were tested. Results of each test in all the examined areas were evaluated and compared with the data obtained on the nonoperated side (control side). Results of neurosensory tests indicated good recovery of sensation with little difference in comparison with the control side, showing that the functional consequence of ZMCF should actually be considered only as a transitory event.

Adolescent↗
PubMed1993

Maxillo-malar osteotomy as an approach to the clivus.

Among various approaches to the clivus and upper cervical spine, transmaxillary access gives the neurosurgeon optimal visibility. Maxillo-malar osteotomy permitting the reflection of the osteotomized segment pedicled to the cheek after a Weber-Fergusson type cutaneous incision is the method that for the authors gives the best visibility. A wide operating field from upper clivus to C4 can be obtained by performing a maxillo-malar osteotomy associated with a midline splitting of hard and soft palate. The authors have performed this kind of access in five cases for neurosurgical purposes. Healing was always uneventful and no complications were observed. Occlusion was always restored without intermaxillary fixation, facial scars were of good quality and the only drawback was the section of infraorbital nerve.

Cranial Fossa, Posterior↗
PubMedDate not supplied

[A new "light" maxillomandibular fixation system].

BACKGROUND: A new "light" maxillo-mandibular fixation system for treatment of mandibular fractures, based on use of special pins, is proposed. METHODS: Fifteen patients with non-displaced mandibular fractures (angle, body and symphysis), have been treated at the Department of Maxillofacial Surgery, S. Paolo University Hospital, Milan. The system is based on pins formed by a no. 1 metal wire and a bead. The free end of the pin is threaded around a tooth and then wound three or four times around the bead to fix it in place and, at the same time, separate it from the gingiva. One pin is usually positioned on each quadrant. Once the pins are in place they are tied to each other using a loop no. 0 to complete the maxillo-mandibular fixation. Particular attention was paid to maintain a correct individual occlusion. The time of maxillo-mandibular block was 10-15 days. RESULTS: Results were good with complete healing of all fractures, restoration of individual occlusion, minimal periodontal lesions and a good compliance for the treatment by the patients. CONCLUSIONS: It is suggested to use this system routinely because quick, economic, easy on periodontium and relatively comfortable for the patients. The contraindication include an unstable occlusion, the absence of a suitable pair of teeth on both sides of the jaws, avulsion or trauma or periodontopathy of one of the teeth needed for the fixation system.

Bone Nails↗
PubMedDate not supplied

[Digital panoramic radiography in patients with rigid internal fixations devices after maxillofacial surgery].

INTRODUCTION: Digital techniques have found promising applications in dental radiology in the recent past, namely with radiovisiography and digital panoramic radiography. These images present some features making them particularly interesting for alveolar bone studies. MATERIAL AND METHODS: Digital panoramic radiography with light-emitting phosphors was performed on 16 patients during postoperative follow-up. The patients were previously submitted to multiple maxillofacial osteosynthesis with rigid internal fixation devices (32 miniplates, 12 microplates, 14 screws). Digital images were always observed and printed with analogic-like and Xeroradiographic-like post-processing. RESULTS: Digital panoramic radiographs yielded clear and effective images of the maxillary and mandibular arches and of surgical osteosynthesis, as demonstrated by a retrospective evaluation performed by three independent observers on a blind basis (score 3: 60.42%), with no major interobserver differences (p = .7286). Xeroradiographic-like images were the most effective in depicting bone structures and osteosynthesis materials, thanks to their better detailing and typically lower overall contrast. Among the drawbacks of the digital technique, reduced cassette size may prevent the full view of the mandibular arch from the symphysis to both condylar regions. The edge effect, which is typical of Xeroradiographic images, may mask useful details within the trabecular bone close to metal implants. This effect was present in some of our cases, but it was seldom disturbing according to our retrospective evaluation (score 3: 53.40%), with good interobserver agreement (p = .1117). CONCLUSION: Digital panoramic radiography proves to be a useful tool to study metal implants after maxillofacial surgery as well as alveolar bone structure. The digital technique markedly reduces the radiation dose to the patient, which is very important for an X-ray examination that must be repeated several times, often in young subjects.

Adult↗