Topcuoğlu E., Öztürk T., Yağcı A.

25th Balkan Stomatological Society (BaSS) Congress, Sarajevo, Bosnia And Herzegovina, 19 - 21 May 2022, vol.25, pp.276

  • Publication Type: Conference Paper / Summary Text
  • Volume: 25
  • City: Sarajevo
  • Country: Bosnia And Herzegovina
  • Page Numbers: pp.276
  • Erciyes University Affiliated: Yes


Background: The aim of this study was to show the treatment of a patient with unilateral posterior crossbite and polydiastema with rapid maxillary expansion and fixed orthodontic appliances.

Materials and Methods: A 17-year-old female patient presented with the complaint of spaces between her teeth. She was diagnosed with unilateral posterior crossbite on the right, spaced between the teeth (polydiastema) in the lower and upper dental arches, dental class I malocclusion, 1 mm overjet and overbite, 0.5 mm upper dental midline and 1 mm lower dental midline to the right. Skeletal class I malocclusion (ANB 1.7), normal vertical pattern (SN/GoGn 32.9), normal position but proclined upper incisors(U1-SN 112.1, U1-NA 3.4 mm), normal position and inclination lower incisors(IMPA 89.9, L1-NB 4.5 mm), a normal nasolabial angle and normal lips were found in cephalometric values. At the end of all evaluations, it was decided to apply fixed orthodontic appliances after rapid maxillary expansion with hyrax.

Results: Rapid maxillary expansion procedure with Hyrax expansion device 4 months, total treatment time 18 months. Stable class I occlusion was achieved at the end of the treatment, the overjet and overbite were 2mm, and the midlines were overlapping. In the final cephalometric evaluation, the positions of SNA, SNB, ANB, SN/GoGn, and upper incisors were in appropriate values, but the lower incisors were somewhat retroclined. Fixed lingual retainers were applied between the lower first premolars and between the upper lateral incisors for orthodontic reinforcement, and it was also recommended to wear essix clear appliances continuously in the lower and upper dental arches.

Conclusion: Unilateral crossbite and polydiastema problem are successfully treated with hyrax type expander and fixed orthodontic appliances. The results of the treatment are stable and good occlusion, acceptable orofacial functions and facial aesthetics