scholarly journals Dental arch size and shape after maxillary expansion in bilateral complete cleft palate: A comparison of three expander designs

2019 ◽  
Vol 90 (2) ◽  
pp. 233-238 ◽  
Author(s):  
Fernando Pugliese ◽  
Juan Martin Palomo ◽  
Louise Resti Calil ◽  
Arthur de Medeiros Alves ◽  
José Roberto Pereira Lauris ◽  
...  
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Procrustes Analysis ◽  
Size Analysis ◽  
Dental Arch ◽  
Maxillary Expansion ◽  
Size And Shape ◽  
T1 And T2 ◽  
Quad Helix ◽  
Arch Shape

ABSTRACT Objective: The objective of this study was to compare the effects on upper dental arch size and shape after maxillary expansion with Hyrax, Quad-helix, and a differential opening expander in bilateral cleft lip and palate (BCLP) patients. Materials and Methods: Seventy-five BCLP patients were divided into three groups: Hyrax (H), Quad-helix (QH), and Expander with differential opening (EDO). Digital models were obtained before (T1) and after 6 months (T2) of maxillary expansion. Twelve landmarks were placed by one investigator on T1 and T2 dental models of each group, and x,y coordinates for each landmark were collected. For dental arch size analysis, centroid size of each dental arch at T1 and T2 was calculated from raw coordinates and was used as the measure of size. Procrustes Analysis was performed for dental arch shape analysis. Analysis of variance was used to compare the groups for size and shape differences (P < .05). Results: There were no significant dental arch size differences among the expanders at T1 or T2. Differences in arch shape were found between all groups at T2. Intragroup arch shape showed a significant variation for the QH and EDO groups. while it remained stable in the H group. Conclusions: Both the QH and the EDO create dental arch shape changes with greater intercanine than intermolar increase. The H does not change the dental arch shape.

scholarly journals Transverse Expansion of Contracted Maxillary Dental Arch in Patients with Cleft Lip and Palate-Application of Surgically Assisted Maxillary Expansion-

2007 ◽  
Vol 17 (3) ◽  
pp. 206-212
Author(s):  
KAZUHIRO ONO ◽  
TADAHARU KOBAYASHI ◽  
CHIKARA SAITO ◽  
JUN-ICHI FUKUDA ◽  
RITSUO TAKAGI ◽  
...  
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Dental Arch ◽  
Maxillary Expansion ◽  
Transverse Expansion

scholarly journals Maxillary distraction osteogenesis for correction of maxillary retrognathia in cleft lip and palate patients: a case series

2019 ◽  
Vol 5 (6) ◽  
pp. 154
Author(s):  
Burçak Kaya ◽  
Secil Cubuk ◽  
Sıdıka Akdeniz ◽  
Burak Bayram
Keyword(s):  
Distraction Osteogenesis ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Treatment Protocol ◽  
Case Series ◽  
Dental Arch ◽  
Maxillary Expansion ◽  
Oronasal Fistula ◽  
Alveolar Bone Grafting ◽  
Maxillary Distraction

<p class="abstract">The treatment protocol of patients having maxillary retrognatia is presented in this case series. Maxillary expansion, secondary alveolar bone grafting and/or oronasal fistula closure were performed in 6 cleft lip and palate patients. Preoperative simulation of Le Fort I osteotomy and adaptation of maxillary distractors were realized with stereolytographic cranium models. Intraoral maxillary distraction was applied under general anesthesia. A single unit acrylic occlusal splint was ligated to maxillary dental arch and worked as a guide during entire activation and consolidation period of distraction osteogenesis. Rigid internal fixation plates were placed in the osteotomy sites at the end of consolidation period. The amount of maxillary advancement was between 5-14 mm.  Satisfying occlusal and skeletal relationships were obtained in all patients. Advancement of maxilla by distraction osteogenesis resulted in gradual formation of bone at the osteotomy line and enhanced treatment outcome in patients with cleft lip and palate.</p>

scholarly journals Cephalometric evaluation of rapid and slow maxillary expansion in patients with BCLP: Secondary data analysis from a randomized clinical trial

2019 ◽  
Vol 89 (4) ◽  
pp. 583-589 ◽  
Author(s):  
Leonardo Gregório ◽  
Arthur César de Medeiros Alves ◽  
Araci Malagodi de Almeida ◽  
Rodrigo Naveda ◽  
Guilherme Janson ◽  
...  
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Controlled Trial ◽  
Secondary Analysis ◽  
Secondary Data ◽  
Study Groups ◽  
Maxillary Expansion ◽  
Posterior Crossbite ◽  
Facial Pattern ◽  
Quad Helix

ABSTRACT Objective: To compare the dentoskeletal effects of rapid (RME) and slow (SME) maxillary expansion in patients with bilateral complete cleft lip and palate (BCLP). Materials and Methods: This was a secondary analysis of a previous randomized controlled trial (RCT). Forty-six patients (34 male, 12 female) with BCLP and posterior crossbite (mean age of 9.2 years) were randomly assigned to two study groups. Group RME comprised subjects treated with Haas/Hyrax expander. Group SME included patients treated with quad-helix appliance. Cone-beam computed tomography (CBCT) was performed before expansion (T1) and after appliance removal at the end of a 6-month retention period (T2) for a previous RCT that compared the transverse skeletal effects of RME and SME. CBCT-derived cephalometric images were generated and cephalometric analysis was performed using Dolphin Imaging Software (Chatsworth, Calif). Intergroup comparisons were performed using t tests (P &lt; .05). Results: Baseline forms were similar between groups. No significant differences between RME and SME groups were found. Conclusions: Rapid and slow maxillary expansion produced similar sagittal and vertical changes in patients with BCLP. Both Haas/Hyrax and quad-helix appliances can be used in patients with vertical facial pattern. Clinical relevance: RME and SME can be equally indicated in the treatment of maxillary arch constriction in patients with BCLP.

scholarly journals Analysis of the maxillary dental arch after rapid maxillary expansion in patients with unilateral complete cleft lip and palate

2016 ◽  
Vol 149 (5) ◽  
pp. 705-715 ◽  
Author(s):  
Priscila Vaz Ayub ◽  
Guilherme Janson ◽  
Bruno Frazão Gribel ◽  
Tulio Silva Lara ◽  
Daniela Gamba Garib
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Rapid Maxillary Expansion ◽  
Dental Arch ◽  
Maxillary Expansion

scholarly journals Transverse effect of Haas and Hyrax appliances on the upper dental arch in patients with unilateral complete cleft lip and palate: A comparative study

2014 ◽  
Vol 19 (2) ◽  
pp. 39-45 ◽  
Author(s):  
Anna Júlia de Oliveira Façanha ◽  
Tulio Silva Lara ◽  
Daniela Gamba Garib ◽  
Omar Gabriel da Silva Filho
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Rapid Maxillary Expansion ◽  
Dental Arch ◽  
Maxillary Expansion ◽  
Group I ◽  
Transverse Effect ◽  
3D Software ◽  
Deciduous Molars ◽  
Hyrax Appliance

Objective: The aim of the present study was to evaluate the transverse effect of rapid maxillary expansion in patients with unilateral complete cleft lip and palate while comparing the Haas and Hyrax appliances. Methods: The sample consisted of 48 patients divided into two groups: Group I - 25 patients treated with modified Haas appliance (mean age: 10 years 8 months); and Group II - 23 patients treated with Hyrax appliance (mean age: 10 years 6 months). Casts were taken during pre-expansion and after removal of the appliance at the end of the retention period. The models were scanned with the aid of the 3 Shape R700 3D scanner. Initial and final transverse distances were measured at cusp tips and cervical-palatal points of maxillary teeth by using the Ortho Analyzer(tm) 3D software. Results: The mean expansion obtained between cusp tips and cervical-palatal points for inter-canine width was 4.80 mm and 4.35 mm with the Haas appliance and 5.91 mm and 5.91 mm with the Hyrax appliance. As for first premolars or first deciduous molars, the values obtained were 6.46 mm and 5.90 mm in the Haas group and 7.11 mm and 6.65 mm in the Hyrax group. With regard to first molars, values were 6.11 mm and 5.24 mm in the Haas group and 7.55 mm and 6.31 mm in the Hyrax group. Conclusion: Rapid maxillary expansion significantly increased the transverse dimensions of the upper dental arch in patients with cleft palate, with no significant differences between the Hass and Hyrax expanders.

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