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Biomedical subjects

R H Kallal

Publications and source records attributed to R H Kallal.

7 recordsLinked to original sources
PubMed1995

Subjective evaluation of profile prediction using video imaging.

Video imaging has become a popular tool for predicting soft tissue profiles. However, it is important not to create false expectations with its use. The purpose of this study was to evaluate the clinical acceptability of video imaging for the prediction of soft tissue changes in mandibular advancement orthognathic surgery, and thus, to determine its suitability for patient presentation, education, and subsequent treatment planning. Simulated mandibular advancements were performed on 30 patients (21 women and 9 men) using the Dentofacial Planner Plus v1.5 software program. Two separate panels consisting of 25 laypersons and 25 dental professionals (17 orthodontists and 8 oral and maxillofacial surgeons) compared prediction images to actual posttreatment images. Overall profile predictions were found to be clinically acceptable by orthodontists and oral and maxillofacial surgeons in 87.8% of the cases and by laypersons in 95.6% of the cases. No significant differences were found among the individual facial regions graded by the dental professional panel. The results of this study suggest that video imaging is an acceptable tool for profile prediction.

Cephalometry↗
PubMed1995

The relationship between presurgical hyoid bone position and 1-year postsurgical change in mandibular position following mandibular advancement surgery.

The presurgical hyoid bone position and its relationship to changes in the position of the mandible 1 year following mandibular advancement surgery was studied. Thirty-eight adult patients with mandibular deficiency underwent surgical correction with a bilateral sagittal split ramus osteotomy procedure and rigid fixation. Lateral cephalometric radiographs taken presurgically, 1 week postsurgically, and approximately 1 year postsurgically were hand traced and digitized. Horizontal and vertical measurements, made from the landmarks hyoidale and pogonion to a vertical reference line perpendicular to sellanasion line + 7 degrees and passing through basion point, were used to determine the position of the hyoid bone and the mandible, respectively. The presurgical hyoid bone position and the amount of postsurgical change in position of the mandible were compared using the Pearson's correlation coefficient (r). Results of this study indicate that no statistically significant correlation exists between the presurgical hyoid bone position and the degree of mandibular change 1 year following mandibular advancement surgery (P < .05).

Adolescent↗
PubMed1982

The image intensifier in oral and maxillofacial surgery.

The mobile image intensifier has been found useful in the removal of foreign bodies from both intraoral and extraoral sites. The safety of the machine has been verified, and a technique for its application is described. Additional uses for the machine are stated.

Adult↗
PubMed1977

Cranial dislocation of mandibular condyle.

The ninth case of condylar dislocation into the middle cranial fossa is reported. The previously reported cases are reviewed and the clinical findings which they have in common are pointed out. Because difficulty in establishing the diagnosis seems to be the most serious aspect of this clinical entity, it is advised that films of the temporomandibular joint be taken more frequently. Finally, although treatment varied from physical therapy to intracranial condylectomy, our case of closed withdrawal of the condyle from the cranial fossa is the first case on record so treated.

Adolescent↗