CONDYLAR POSITION IN ORTHOGNATHIC SURGERY IN A GROUP OF PATIENTS PRESENTING TEMPOROMANDIBULAR DISORDERS

The primary functional aim of orthognathic surgery is to achieve correct condyle position within the mandibular fossa and in relation to the articular discs. During orthognathic surgery for temporomandibular disorders, condylar position was functionally assessed by means of electromyography-kinesiography and surgical reference baseplates before and after the operation. The initial results were partially encouraging: muscular dysfunction resolved, whereas articular dysfunction persisted in some cases

MAXILLARY EXPANSION AND STABILITY IN THE ORTHONTIC-SURGICAL TREATMENT OF SKELETAL ANTERIOR OPEN BITE

Objective: Aim of this study is to analyze retrospectively the stability of the surgical/orthodontic treatment of skeletal open bite in relation to the skeletal classification and treatment proposed. The role of surgical maxillary expansion is analyzed in relation to long-term stability. Materials & Methods: Twenty patients presenting anterior skeletal open bite were undergone Le Fort I osteotomy alone (6 pts), bimaxillary surgery (12 pts) or bilateral sagittal split mandibular osteotomy (2 pts). Bipartition of the maxilla was carried out in five cases, and a midline osteotomy of the palate with a V -shaped anterior osteotomy was performed in one more case. Rigid internal fixation was used. Follow-up was from 1 to 10 years (mean 4 years). Records analyzed were pre-, post-surgical and follow-up cephalometric radiographs and dental models. Results: Eighty-five percent (17/20) of the patients had stable clinical and cephalometric results. Three patients experienced dental or skeletal relapse: in these patients the relapse was related to a recurrence in the palatal transverse dimension, which was expanded during orthodontic alignment. Transverse dimension of the maxilla was more stable in pts who underwent to a maxillary partition. Conclusions: Stability of surgical treatment of skeletal open bite seems to be related to a proper diagnosis and a surgical plan which must pay attention to the management of maxillary transverse diameter

Impact of alfalfa mosaic virus subgroup I and II isolates on terpene secondary metabolism of Lavandula vera D.C., Lavandula x alardii and eigth cultivars of L. hybrida Rev.

Lavandula vera D.C., Lavandula X alardii and eight different L. hybrida Rev. cultivars cultivated at the Herb Garden of Casola Valsenio (Italy) were found naturally infected by Alfalfa mosaic virus (AMV). The viral disease, consisting of a \u201cyellow mosaic\u201d on leaves and stems, was identified by means of electron microscopy, RT-PCR-RFLP and PAS-ELISA assays. Four of the AMV isolates were molecular characterized by determining the nucleotid and aminoacid sequences of the coat protein. Phylogenetic relationships suggested that three of them belonged to subgroup I (from cvs. Ordinario and Grosso, Lavandula X alardii), while the isolate from cv. Sumiens showed molecular features of subgroup II. These results confirm the spread in Italy of AMV isolates belonging to subgroup I; the \u201cSumiens\u201d isolate of subgroup II has been probably introduced with infected vegetative propagation material. By means of GC/GC-MS, the influence of the \u201cyellow disease\u201d on essential oil biosynthesis and quality was verified. The infection of Lavandula plants by AMV (of the two subgroups) was found to decrease essential oil secretion. Changes in the relative composition regarded the linalool-linalyl acetate ratio, the overall increase in terpenic esters and in some cases an increased sesquiterpenic abundance. The importance of the phytopathological status of essential oil bearing crops is outlined