eng Science and Education Publishing American Journal of Medical Sciences and Medicine 2327-6657 2014-01-20 2 1 13 15 10.12691/ajmsm-2-1-3 AJMSM2014213 article Mazen Almasri mazen_ajm@yahoo.com 1 Oral Maxillofacial Surgery, Umm Alqura Uni - Makka city, Saudi Arabia Objective: to study the prevalence of skeletal malocclusion (SMO) cases in the orthodontic and maxillofacial surgery unit of King Khalid university health center / Aseer central Hospital (KKUHC) in the southern Aseer region of Saudi Arabia (SSA) where no previous epidemiological data took place. Materials and methods: A retrospective chart review of all the cases visiting the orthodontic / maxillofacial surgery unit at KKUHC from September 2010 to August 2012 was reviewed. All the pertinent data were extracted and tabulated for investigation while incomplete records were eliminated. Results: A total of 364 completed charts were included in the study and all the pertinent data were extracted and tabulated. It was found that 42% of the cases had skeletal malocclusion (SMO) while 58% had dental maocclusion only. Class 3 SMO represented the majority of the cases scoring 49% of the records. The female to male ratio was 1:3.2, which is significantly lower than other recorded studies. Conclusion: SMO deformity was found to be a common presentation in the SSA health care center where class 3 comprised the majority unlike other areas in the country. http://pubs.sciepub.com/ajmsm/2/1/3/ajmsm-2-1-3.pdf prevalenceorthognathicskeletal malocclusionSaudi