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Biomedical subjects

A A Heggie

Publications and source records attributed to A A Heggie.

At least 19 recordsLinked to original sources
PubMed2000

Use of a resorbable fixation system in orthognathic surgery.

We present our early experience with the use of a resorbable plating system in orthognathic surgery. Thirty-one patients who have finished growing and who had dentofacial deformities that were not part of syndromes were treated by routine orthognathic repositioning procedures: maxillary (n = 8) and mandibular (n = 9) osteotomies, or bimaxillary procedures (n = 14). All skeletal fragments were fixed with resorbable plates and screws. The follow-up period ranged from 2-8 months (mean 5). All the patients recovered normally except for one who developed a localized buccal space infection. In the early postoperative period, six patients had mild mobility of the maxilla, but stability was within normal limits at six weeks postoperatively. We conclude that, though technique has an important influence on success, LactoSorb is a good fixative for maxillo-mandibular repositioning.

Absorbable Implants↗
PubMed1999

Juvenile ossifying fibroma of the midface.

Juvenile ossifying fibroma is an unusual maxillofacial fibro-osseous lesion characterized by cell-rich osteoid strands. A 7-year-old girl presenting with a massive juvenile ossifying fibroma of the maxilla resulting in facial deformity, orbital displacement, and extension into the anterior skull base is discussed. The importance of combining clinical, radiographic, and histopathological findings for the diagnosis and management of the tumor is discussed.

Child↗
PubMed1998

Rhinoplasty in achieving total facial harmony.

Surgical alteration of the nose has challenged surgeons for decades and rhinoplasty is often described as one of the most difficult aesthetic procedures to master. As in the case of planning the orthognathic patient, there is a blend of aesthetic and functional goals. While patients may primarily present for cosmetic reasons, the maintenance of functional nasal airways in the pursuit of an improvement in facial balance is essential. It is the purpose of this paper to present the assessment and management of common nasal deformities, some of which are integrated within simultaneous orthognathic surgery.

Esthetics↗
PubMed1998

The use of bone grafts and substitutes in the craniomaxillofacial region.

Craniomaxillofacial defects arise from congenital abnormalities or are acquired following trauma or ablative surgery. Various bone grafting techniques have been developed for application in the facial skeleton to assist in the reconstruction of small alveolar deficiencies to more complex, extensive bony defects. Autogenous grafts from different sites vary in volume, stability and contour characteristics. The introduction of allogeneic grafts has further increased the possibilities for hard tissue replacement as have alloplastic substitutes which have been used successfully. Recent advances in bone regeneration in the maxillofacial region using distraction osteogenesis and the recent advent of cell culture techniques have introduced new therapeutic approaches that will provide the foundation for a significant shift in the approach to reconstructive surgery of the facial skeleton.

Biomedical Engineering↗
PubMed1996

Concepts in the management of temporomandibular ankylosis.

Temporomandibular ankylosis is a relatively rare condition in the western world and is usually due to trauma or infection. There is a potential for significant growth disturbance in the growing patient and active treatment must be undertaken at an early stage. Aggressive resection of the ankylosis with or without coronoidectomies is performed followed by growth centre transplantation and active postoperative physiotherapy. In the adult patient, a large-gap arthroplasty must be created followed by an interpositional tissue transfer such as a temporalis flap or an alloplastic reconstruction.

Ankylosis↗
PubMed1993

The modified Le Fort III osteotomy in the correction of mid-facial deficiency. Case reports.

Maxillary hypoplasia is a common diagnosis in the spectrum of dentofacial deformities and is usually corrected by a Le Fort I maxillary advancement osteotomy. The modified Le Fort III osteotomy enables correction of mid-face hypoplasia where the maxillary hypoplasia is associated with infraorbital and zygomatic deficiency. This procedure is described and illustrated in two case reports. It is considered to be a superior technique to the maxillary osteotomy and onlay procedure and is recommended for use in selected patients.

Adolescent↗
PubMed1990

A review of the management of anterior open bite malocclusion.

Anterior openbite (AOB) malocclusion is considered one of the most demanding challenges for the orthodontist, as occlusal correction is difficult, facial aesthetics may be unsatisfactory and the incidence of relapse is high. A retrospective cephalometric study of 19 consecutively treated AOB patients is presented. The follow-up ranged from 12 to 48 months. Several case reports are included to demonstrate a contemporary approach combining orthodontic treatment and orthognathic surgery. The results indicate that overbite was maintained with good vertical skeletal stability. Anteroposterior position was less stable. Posterior facial height was maintained or decreased, and there was no evidence of postsurgical maxillary incisor movement. It is concluded that occlusal stability and clinical success may be anticipated when certain criteria are adhered to in all phases of treatment, and that a coordinated surgical-orthodontic treatment approach currently offers the best chance of attaining occlusal stability, improved function and satisfactory aesthetics.

Adolescent↗
PubMed1985

An example of the use of quantitation in histological diagnosis by a comparison of normal human cheek mucosa and cheek mucosa affected by lichen planus.

As an example of the use of quantitation in histological diagnosis the features of normal human cheek mucosa (NHCM) and non-ulcerative lichen planus of the cheek mucosa (LPCM) have been systematically studied and quantified in order to establish normal and pathological features which are constant. The technique enabled the quantitative verification of previously held concepts relating to NHCM and LPCM. A number of interesting features which have been given little attention in past literature were also noted. It is proposed that a reliable quantifiable range of characteristic histological features should be established for use in diagnosis where possible rather than relying on the subjective approach currently employed.

Basement Membrane↗