Dental Tribune Middle East & Africa Edition

DISCUSSION Theresultsrevealednogender differences between adult Emirati males and females in skeletal or dental relationship except for measurement SN-PP; females (10.7) subjects averaged a 2.3 de- grees higher SN-PP measurement compared to males (8.4) subjects. The cephalometric values from the Emirati study were com- pared to published Steiner (1952) and Eastman (MacAllister 1992) normative cephalometric values (Table2). Thecomparisondemon- strated similarity in antero-poste- rior cepahalometric angular measurements with both norma- tive values; no apparent differ- ences were found in angles SNA, SNB, or ANB. In contrast, measurements of the position of the dentition were dissimilar.Interincisalangleinthe Emirati sample averaged 118.6 and was substantially less than the Steiner(127.0)andEastman134.0) values. The Emirati sample also had more proclined upper (116.3) incisor position compared to the Eastman value (108.0), and Emi- ratilower(100.1)incisorswassub- stantially more proclined com- pared to both the Eastman (91.0) and the Steiner (93.0) values. The dentition was substantially more protrusive I the Emirati sample with U1-NA and L1-NB values more than 2 millimeters more an- terior than the Steiner norms; Li- APog value for Emiratis was about 6 millimeters more protrusive that the Eastman value. The findings of the present study are consistent with other published studies comparing Arab subjectswithnon-Arabsamples.In Saudi samples, Sarhan (1988), Hassan(2005), andAl-Jasser(2003 & 2005) also found greater procli- nation and protrusion of incisors compared to a Caucasian sample. Behbehani (2006) found Kuwaitis had more proclination and protru- sion of mandibular incisors. Han- dan (2001) found Jordanians 4 to 6 millimeters more protruded rela- tivetoA-PoganddescribedhisJor- danian sample as more bi-maxil- lary protrusive. Bishara (1990) de- scribedhisEgyptianboysashaving a tendency toward bimaxillary dental protrusion compared with Iowaboys;Egyptiangirlshadarel- atively more convex profile and a tendency toward mandibular den- tal protrusion. CONCLUSIONS Asampleof61adultEmiratina- tionals with Class I malocclusion wereanalyzedinordertoestablish and Emirati cephalometric norm. The sample was comprised of 30 males and 30 females with a mean age of about 24 years who had pre- sentedfororthodontictreatmentat one of the two Abu Dhabi national dental centers. Ethnicity was vali- dated based upon family name. Dolphin Imaging software was usedtoperformthecephalometric analyses. Only one gender differ- ence was demonstrated out of the 22 cephalometric analysis meas- urements used in the study; SN-PP mean for females (10.7) subjects averageda2.3degreehighermean value than the males (8.4.) The cephalometric study results were compared to published norms from Steiner and Eastman. Basedupontheconditionsof the present study, it may be con- cluded that adult Emirati males and females seeking orthodon- tictreatmentwithClassImaloc- clusionpresentsimilarcephalo- metric profiles with the excep- tion that measurement SN-PP may be steeper in females than males. Moreover, Emiratis are likely to present greater incisor proclination and protrusion than Caucasians and may be generallyconsideredasmorebi- maxillary protrusive. DENTALTRIBUNE Middle East & Africa Edition Practice Matters 9 AD Table 2: A comparison of lateral cephalometric values for an Emirati sample with Class I malocclusion with both Steiner and Eastman normative values. Ten measurements are compared and includes means and sample size (n). Note that Emiratis are more bimaxillary protrusive with incisors proclined and protrusive to a greater extent. measurement Emirati mean (n=61) Steiner means (n=74) Eastman mean (n=30) SNA 81.7 82.0 81.0 SNB 78.6 80.0 78.0 ANB 3.1 2.0 3.0 UI-NA mm 6.1 mm 4mm LI-NB mm 6.6 mm 4mm SN-GoGn 34.6 31.7 U1-L1 118.6 127.0 134.0 UI-PP 116.3 108.0 LI-GoGn 100.1 93.0 91.0 LI-APog mm 5.5 -0.9 2005 - BDS, Ajman University, Abu Dhabi , UAE 2010 - MSD in Orthodontics, Nicolas & Asp University College, Dubai, UAE 2010 - Specialist Certificate in Or- thodontics, Malmö University, Sweden Forfurtherinformationaboutthear- ticle,youmaycontactDr.Tayseeron: taalzain@gmail.com About the author