Modern trends in Class III orthognathic treatment: A time series analysis

Abstract

Objective: To examine the current trends in surgical-orthodontic treatment for patients with Class III malocclusion using time-series analysis. Materials and Methods: The records of 2994 consecutive patients who underwent orthognathic surgery from January 1, 2004, through December 31, 2015, at Seoul National University Dental Hospital, Seoul, Korea, were reviewed. Clinical data from each surgical and orthodontic treatment record included patient's sex, age at the time of surgery, malocclusion classification, type of orthognathic surgical procedure, place where the orthodontic treatment was performed, orthodontic treatment modality, and time elapsed for pre-and postoperative orthodontic treatment. Results: Out of the orthognathic surgery patients, 86% had Class III malocclusion. Among them, two-jaw surgeries have become by far the most common orthognathic surgical treatment these days. The age at the time of surgery and the number of new patients had seasonal variations, which demonstrated opposing patterns. There was neither positive nor negative correlation between preand postoperative orthodontic treatment time. Elapsed orthodontic treatment time for both before and after Class III orthognathic surgeries has been decreasing over the years. Conclusion: Results of the time series analysis might provide clinicians with some insights into current surgical and orthodontic management. (Angle Orthod. 2017;87:269-278)

Automated Identification of Cephalometric Landmarks: Part 2- Might It Be Better Than human?

“…The descriptive summary in Table 1 reflects and matches well with the current trend of patients seeking a university-affiliated dental healthcare institution that has a high proportion of orthodontic patients with severe skeletal discrepancies. 26 The cephalometric landmarks identified could potentially result in errors on both the x and y axes. There are several advantages when visualizing results with scattergrams and the 95% confidence ellipse that was a two-dimensional expansion of the Bland-Altman plot.…”

Extensive Surgical Procedures Result in Better Treatment Outcomes for Bisphosphonate-Related Osteonecrosis of the Jaw in Patients With Osteoporosis

“…For time-related variables, the median, rather than the mean, was computed because time-related variables were skewed in distribution. 25 To identify the risk factors and the recurrence pattern over time, we applied a survival analysis using the Cox proportional hazard model. To graphically reveal which factor is the most important for the treatment outcome, we depicted the conditional inference tree structure using the ctree package in the R Programming Language (R Foundation for Statistical Computing, Vienna, Austria).…”

Skeletal and dental effects of Class III orthopaedic treatment: a systematic review and meta‐analysis

“…Skeletal class III malocclusion is one of the most investigated topics in orthodontics . The skeletal and dental components of Class III malocclusions are usually established since early childhood and may worsen with growth .…”

“…The skeletal and dental components of Class III malocclusions are usually established since early childhood and may worsen with growth . In the majority of cases, without any treatment during childhood, orthognathic surgery is the only option to establish a correct occlusion . However, early interception of this malocclusion may represent an opportunity to avoid or reduce the risk of surgery .…”