The evidence base for oral and maxillofacial surgery: 10-year analysis of two journals.

All articles published in the British Journal of Oral and Maxillofacial Surgery (BJOMS) and the International Journal of Oral and Maxillofacial Surgery (IJOMS) between January 1999 and December 2009 were classified by study design and evaluated to find the evidence base in oral and maxillofacial surgery (OMFS). Those in related specialties, and the impact factor of related dental journals were also compared. From a total of 3294 articles (1715 (52%) BJOMS; and 1579 (48%) IJOMS) most of the studies were observational or descriptive (36% BJOMS; and 31% IJOMS). Review articles constituted 5% in the British Journal and 6% in the International Journal. Analytical (non-controlled) studies made up 6% and 7% of the studies in the British Journal and the International Journal, respectively. There were 28 randomised controlled trials (RCT) (2%) in the British Journal and 40 (3%) in the International Journal. One meta-analysis was recorded in the International Journal, and one closed loop audit was recorded in the British Journal. Forty percent of the papers in both journals were non-clinical, scientific, or animal studies. The number of RCTs published in OMFS is low and is comparable with the related specialties of ear, nose, and throat (ENT) (1%) and plastic surgery (4%). Greater effort is required to carry out quality research if we are to provide the best possible evidence to patients for our interventions.