Arch perimeter changes on rapid palatal expansion

Adkins, Michael D.; Nanda, Ram S.; Currier, G. Fräns

doi:10.1016/s0889-5406(05)80051-4

Cited by 259 publications

(198 citation statements)

References 6 publications

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“…These are technical problems such as loosening or breakage of the expander and biological problems such as pain, 2 nonopening of the midpalatal suture, 3 dental tipping, 4 root resorption of the anchor teeth, 5 gingival recession, 6 widening of the nasal root and nasal bridge, 7 swelling and reddening, 8 and occurrence of nasal septum asymmetries. 8 Root resorption occurs because of individual biologic and genetic predisposition and the effect of mechanical factors.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and comparison of root resorption between tooth-borne and tooth-tissue borne rapid maxillary expansion appliances: A CBCT study

Di̇ndaroğlu

Doğan

2015

The Angle Orthodontist

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Objective: To compare volumetric root resorption after rapid maxillary expansion (RME) between tooth-borne and tissue-borne appliances using CBCT. Repair in resorption cavities after 6 months of fixed retention was also compared. Materials and Methods: A sample of 33 subjects were randomly divided into two groups: Hyrax (n 5 16) and Haas (n 5 17). CBCT scans were taken 6 months before expansion, immediately after expansion, and 6 months after fixed retention. Mimics Innovation V 16.0 software was used for segmentation and volumetric measurement of 198 teeth. Bland-Altman plots, independent samples t test, repeated measures analysis of variance, and the Friedman test were used for statistical analysis. Results: Differences in root resorption after RME and repair after retention were not significant between the hyrax and Haas appliances or between male and female. Significant differences were found between preexpansion and postexpansion root volumes in the first premolars and molarseven in unattached second premolars. When the percentage of root volume loss is considered, no significant difference was found between the first premolar, second premolar, and first molar. Volumetric changes after 6 months of retention were not statistically significant.

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Section: Introductionmentioning

confidence: 99%

Evaluation and comparison of root resorption between tooth-borne and tooth-tissue borne rapid maxillary expansion appliances: A CBCT study

Di̇ndaroğlu

Doğan

2015

The Angle Orthodontist

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“…[14][15][16] Lagravere et al 17 stated that most crossbite studies suffer from problems such as small sample size, bias, confounding variables, deficient statistical methods, lack of method analysis and long-term data, blinding in measurements, and deficient controls. 7,[14][15][16][17][18][19][20][21] Since RME studies used fixed appliances post expansion, the effects of pure expansion alone on arch dimensions remain unanswered. [18][19][20][21] Huynh et al 22 demonstrated 84% long-term success in treating early mixed dentition UPXB and bilateral posterior crossbite with their data referring successful and unsuccessful cases.…”

Section: Introductionmentioning

confidence: 99%

“…7,[14][15][16][17][18][19][20][21] Since RME studies used fixed appliances post expansion, the effects of pure expansion alone on arch dimensions remain unanswered. [18][19][20][21] Huynh et al 22 demonstrated 84% long-term success in treating early mixed dentition UPXB and bilateral posterior crossbite with their data referring successful and unsuccessful cases. There are no data on arch dimensions after successful early treatment of UPXB.…”

Section: Introductionmentioning

confidence: 99%

Arch dimension changes from successful slow maxillary expansion of unilateral posterior crossbite

Wong¹,

Sinclair²,

Keim³

et al. 2011

The Angle Orthodontist

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Objective: To evaluate the long-term effects of successful slow maxillary expansion without fixed appliances or retainers in the mixed dentition on patients with unilateral crossbites, using Haastype, hyrax, or quad helix appliances. Materials and Methods: Serial dental casts of 110 patients were evaluated at three time points: preexpansion (T1) (mean age 7 years/7 months), postexpansion (T2) (mean age 8 years/ 8 months), and approximately 4 years later in the permanent dentition (T3) (mean age 12 years/ 9 months). Maxillary and mandibular intercanine and intermolar widths, arch length, and perimeter and molar angulation were measured at all three time intervals with the Michigan published growth norms serving as a control. Results: Successful treatment by slow maxillary expansion (SME) produced similarly favorable expansion by all three expanders in all measurements for both arches. Maxillary arch widths were narrower than controls pretreatment (T1) and wider than controls immediately post treatment (T2). Long-term (T3) maxillary intermolar width was the same as controls, with intercanine width significantly wider than controls. Maxillary intercanine and intermolar width increased from T1 to T3, by 4.5 mm and 3.5 mm, respectively, with 98% of intercanine and 80% of intermolar expansion remaining at T3. Maxillary arch circumference increased by 1 mm from T1 to T3. Mandibular width did not change significantly. Conclusion: Maxillary arch dimensions in early mixed dentition in patients with unilateral posterior crossbite showed good stability 4 years post treatment in the permanent dentition. (Angle Orthod. 2011;81:616-623.)

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“…Distraction osteogenesis produces the regenerate bone thereby adding to the innate basal bone hence potentially greater stability than previous expansion methods [6,7]. The transverse maxillary distraction has been suggested to increase 0.7 mm of arch length gain for every 1.0 mm of rapid maxillary expansion [8]. The technique of transverse mandibular distraction osteogenesis was pioneered by Guererro [9].…”

Section: Discussionmentioning

confidence: 99%