Navigation Links
Computer imaging assists with facial reconstructive surgery

A new calibration technique that involves measuring the distance between the upper ear and chin in photographs could help facial plastic surgeons use computer imaging software to achieve aesthetic harmony in their patients, according to a report in the March/April issue of Archives of Facial Plastic Surgery, one of the JAMA/Archives journals.

“The importance of balanced facial proportions has been studied for centuries by architects, artists, physicians and dentists,?the authors write as background information in the article. It is essential for plastic surgeons to accurately analyze the face before surgery so that afterward, prominent facial features such as the chin and nose are balanced in relation to the structures around them. “Even a well-executed surgery will result in a poor aesthetic result if inaccurate analysis leads to an improper decision (e.g., an excessively large chin implant).?

Travis T. Tollefson, M.D., and Jonathan M. Sykes, M.D., of the University of California, Davis, Medical Center, Sacramento performed a photograph analysis and medical record review of 14 patients (average age 32, 12 females and two males) who underwent combined rhinoplasty (nose surgery) and chin correction at an academic medical center between 1999 and 2004. Six of the patients received implants in their chins, while eight underwent a procedure known as osseous genioplasty, involving surgery on the chin bone. Preoperative and postoperative photographs were analyzed and the distance from the porion (the top of the external ear canal) to the pupil and to the pogonion (the most prominent point on the chin) was measured. These measurements were used to develop a standard scale so that patients?before and after photographs could be compared, even if they were not the same size.

Additionally, the following established measures were analyzed:

  • Cervicomental angle: the intersection of a line drawn next to the neck and a line drawn from the bo ttom of the chin through the point where the neck and the jaw connect
  • Mentocervical angle: the intersection of a line drawn from the tip of the nose to the chin and a line drawn next to the neck
  • Facial convexity angle: the intersection of a line drawn from the forehand to the chin and a line drawn from the bottom of the nose to the chin

In all patients, the porion to pogonion distance and the ratio of the distance between the pupil and the pogonion and the distance between the porion and the pogonion increased, the cervicomental angle decreased, the mentocervical angle decreased and the facial convexity angle increased after surgery. These changes brought the patients closer to the normal range for these measurements and angles.

“Surgery for facial disharmony requires artistic judgment and objective evaluation,?the authors conclude. “For surgeons who use computer imaging software, analysis of profile photographs is the most valuable tool. Even when preoperative and postoperative photographs are of different sizes, relative distance comparisons are possible with a new calibration technique using the constant facial landmarks, the porion and the pupil. The porion-pogonion distance is a simple reproducible measurement that can be used along with established soft tissue measurements as a guide for profile facial analysis.?
'"/>

Source:JAMA and Archives Journals


Related biology news :

1. Computers to be used to find blueprint for new influenza drug
2. Large-scale Computer Simulations Reveal New Insights Into Antibiotic Resistance
3. Computers close in on protein structure prediction
4. Computer modeling reveals hidden conversations within cells
5. Computer models aid understanding of antibody-dependent enhancement in spread of dengue fever
6. Computer-chemistry yields new insight into a puzzle of cell division
7. Computers to save unique type of American red squirrel
8. Computer simulation hints at new HIV drug target
9. Computer scientist sorts out confusable drug names
10. Computer-based games enhance mental function in patients with Alzheimers
11. Computer scientists unravel language of surgery

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/24/2017)... , March 24, 2017 The Controller General ... Controller Mr. Abdulla Algeen have received the prestigious international IAIR ... Continue Reading ... ... picture) and Deputy Controller Abdulla Algeen (small picture on the right) have ...
(Date:3/23/2017)... Research and Markets has announced the addition of the ... to 2025" report to their offering. ... The Global Vehicle Anti-Theft System Market ... the next decade to reach approximately $14.21 billion by 2025. ... for all the given segments on global as well as regional ...
(Date:3/22/2017)... March 21, 2017 Vigilant Solutions , ... law enforcement agencies, announced today the appointment of retired ... of public safety business development. Mr. Sheridan ... experience, including a focus on the aviation transportation sector, ... recent position, Mr. Sheridan served as the Aviation Liaison ...
Breaking Biology News(10 mins):
(Date:4/25/2017)... April 25, 2017 Providence ... licensed its novel immune-modulating technology to an undisclosed global ... allergy. Tregitopes, pronounced T·rej·itopes, are a ... by EpiVax CEO Annie De Groot ... immunoglobulin G, an autoimmune disease therapy, Tregitopes are ...
(Date:4/25/2017)... SEATTLE, WA (PRWEB) , ... April 25, 2017 , ... ... technology division of Quorum, will be featured in multiple sessions at this week’s ... range from emerging trends to best practices in clinical research. , "We are excited ...
(Date:4/21/2017)... ... April 21, 2017 , ... The ... 10 categories with over 30 nominees and well as the first-year award for ... award and the event was hosted by CompanyWeek and Manufacturers Edge, among other ...
(Date:4/21/2017)... and BELLINGHAM, Washington, USA (PRWEB) , ... April ... ... technologies for sensing, imaging, and related applications were the focus of researchers, engineers, ... Commercial Sensing 2017 in Anaheim. , Sponsored by SPIE, the international ...
Breaking Biology Technology: