Development of a system for craniofacial analysis from monitor-displayed digital images.

Objectives: To develop a program for clinical craniofacial analysis directly on monitor-displayed digital images.

Methods: The program was developed in VisualBasic (Microsoft, Redwood WA, USA), using Access (Microsoft) database, for landmark identification analysis and data storage. It runs on Windows95 (Microsoft).

Tirilazad inhibits surgically induced edema and interleukin-1 production. An experimental study in rats.

The aim of this study was to evaluate the anti-inflammatory effect of tirilazad mesylate on edema and interleukin-1 (IL-1) levels in serum following standardized surgical procedures. Four groups, each containing eight rats, were randomized for treatment as follows: A) no medication, B) low-dose tirilazad, C) high-dose tirilazad, and D) corticosteroids. The animals were examined by nuclear magnetic resonance imaging (NMRI) 24 and 72 hours after surgery and the NMRI data were used in the determination of soft tissue edema.

In vitro analysis of the accuracy of subtraction radiography and computed tomography scanning for determination of bone graft volume.

Purpose: This study evaluated the accuracy of digital subtraction radiography (DSR) and three-dimensional computed tomography (3D CT) for determination of bone graft volume in the maxillofacial region.

Materials And Methods: Standardized bone defects were made on the top of the alveolar ridge in 10 dry pig mandibles. To resemble the clinical situation, a bone block was harvested from the symphyseal region of the mandible and fixed in the defect.

Volumetry of bone grafts by three-dimensional computed tomographic reconstruction: an animal study in the minipig.

Objectives: To evaluate the accuracy of 3D-CT reconstruction for determination of bone graft volume in an animal model.

Materials And Methods: Eight minipigs had bone graft reconstruction of an alveolar ridge defect. The true volume of the graft (VOL I) was determined by Archimedes principle before reconstruction.

Comparison of the reliability of craniofacial anatomic landmarks based on cephalometric radiographs and three-dimensional CT scans.

Objective: Conventional cephalometry is an inexpensive and well-established method for evaluating patients with dentofacial deformities. However, patients with major deformities, and in particular asymmetric cases are difficult to evaluate by conventional cephalometry. Both two- and three-dimensional computed tomography (CT) have been proposed to alleviate some of these difficulties.

A comparison of three-dimensional computed tomography scans and stereolithographic models for evaluation of craniofacial anomalies.

Purpose: This article describes the use of stereolithographic (SL) models as an adjunct to treatment planning in patients with Apert's syndrome, scaphocephaly, brachycephaly, and turricephaly.

Patients And Methods: Four syndrome patients had computed tomography (CT) scans done presurgically, and one of these patients was additionally scanned postoperatively. SL models and three-dimensional (3D) CT image reconstructions were produced from the CT data, and linear measurements were compared between the two modalities.