Short-term skeletal and dental changes following bone-borne versus tooth-borne surgically assisted rapid maxillary expansion: a randomized clinical trial study.
OBJECTIVE
To evaluate and compare the short-term (post-retention) skeletal and dental changes following bone-borne and tooth-borne surgically assisted rapid maxillary expansion (SARME) using cone beam computed tomography (CBCT).


METHODS
In this randomized clinical study, 30 patients with transverse maxillary deficiency underwent either tooth-borne (n = 15) or bone-borne (n = 15) SARME. Before treatment and immediately after the consolidation period, CBCT was obtained and the nasal floor width, interdental root distance, palatal bone width and interdental cusp distance were measured at first premolar and first molar regions of maxilla.


RESULTS
Twenty eight patients completed the study protocol. In both tooth-borne (n = 13) and bone-borne (n = 15) groups the highest degree of expansion occurred in the dental arch, followed by palatal bone, and nasal floor (V-shaped widening in coronal dimension). The amount and pattern of expansion was comparable between anterior and posterior maxillary regions in each group (parallel posteroanterior expansion) and between the two groups.


CONCLUSIONS
Dental and skeletal effects of tooth-borne and bone-borne devices were comparable. The overall complication rate was negligible. Selection of an expansion device should be based on each individual patient's requirements. Future long-term clinical trial studies to evaluate the stability and relapse of these two techniques are recommended.
Department of Oral and Maxillofacial Surgery (Head: Mohammad Zandi, DDS, MSc.), Hamedan University of Medical Sciences, Hamedan, Iran.
Mohammad
M
Zandi
Department of Orthodontics (Head: Amirfarhang Miresmaeili, DDS, MSc.), Hamedan University of Medical Sciences, Shahid Fahmideh Street, Hamedan, Iran. Electronic address: amirfarhang@yahoo.com.
Amirfarhang
A
Miresmaeili
Department of Oral and Maxillofacial Surgery (Head: Mohammad Zandi, DDS, MSc.), Hamedan University of Medical Sciences, Hamedan, Iran.
Ali
A
Heidari
D000293:Adolescent; D000328:Adult; D001641:Bicuspid / Q000000981:diagnostic imaging; D002508:Cephalometry / Q000379:methods; D054893:Cone-Beam Computed Tomography / Q000379:methods; D003724:Dental Arch / Q000000981:diagnostic imaging; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008437:Maxilla / Q000002:abnormalities / Q000000981:diagnostic imaging / Q000601:surgery*; D063166:Maxillary Osteotomy / Q000379:methods; D008963:Molar / Q000000981:diagnostic imaging; D009296:Nasal Cavity / Q000000981:diagnostic imaging; D016382:Orthodontic Appliance Design; D019857:Osteogenesis, Distraction / Q000295:instrumentation*; D010155:Palatal Expansion Technique / Q000295:instrumentation*; D021362:Palate, Hard / Q000000981:diagnostic imaging; D011446:Prospective Studies; D019227:Tooth Apex / Q000000981:diagnostic imaging; D019228:Tooth Crown / Q000000981:diagnostic imaging; D055815:Young Adult
Bone-borne; Cone beam computed tomography; Rapid maxillary expansion; Tooth-borne