The effects of maxillary quad-helix appliance expansion on cephalometric measurements in growing orthodontic patients

Frank, Steven W.; Engel, Gary A.

doi:10.1016/0002-9416(82)90075-6

Cited by 58 publications

(43 citation statements)

References 8 publications

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“…He also stated that skeletal movement and segment rotation can occur easily with appliances as simple as removable Quad helix. Frank et al [7] using slow maxillary expansion (Quad helix) found 5.88 mm increase in intermolar width. Other studies also suggest that maxillary expansion using the Quad helix appliance represents a reasonable alternative to using conventional rapid maxillary expansion appliances among cleft patients [8].…”

Section: Discussionmentioning

confidence: 99%

Maxillary Expansion in Cleft Lip and Palate using Quad Helix and Rapid Palatal Expansion Screw

Vasant¹,

Menon

Kannan³

2009

Medical Journal Armed Forces India

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Background: Management of patients with cleft lip and palate (CLP) includes orthodontic treatment prior to bone grafting. Palatal expansion is done using slow or rapid palatal expansions (RPE). Controversy still exists regarding choice of expansion appliances used. This study was conducted to find out whether the Quad helix appliance represents a reasonable alternative to using conventional rapid maxillary expansion appliance among cleft lip and palate patients. Methods: Twenty cleft lip and palate patients had orthodontic study models taken prior to expansion and at the end of expansion. There pre and post treatment study models were analyzed for changes in intermolar width, molar tipping and molar rotation. Result: The difference in molar tipping, increase in intercanine and molar width between slow palatal expansion (SPE) and rapid palatal expansion (RPE) group was not statistically significant. A difference between the two groups was found in the ability to rotate molars. Conclusion: The clinical findings suggest that maxillary expansion using the Quad helix appliance represents a reasonable alternative to using conventional rapid maxillary expansion appliances among cleft patients. MJAFI 2009; 65 : 150-153

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Section: Discussionmentioning

confidence: 99%

Maxillary Expansion in Cleft Lip and Palate using Quad Helix and Rapid Palatal Expansion Screw

Vasant¹,

Menon

Kannan³

2009

Medical Journal Armed Forces India

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“…Bell and Lecompte 18 showed an increase in the intermolar width of 5.3 mm, whereas Frank and Engel 11 reported an increase of 5.88 mm with the quad-helix appliance. Ciambotti et al 15 in his comparative study of RME vs nitinol expansion, reported an increase in intermolar width of 4.76 mm in the RME group and 6.26 mm in the nitinol expansion group.…”

Section: Maxillary Dental Castsmentioning

confidence: 93%

NiTi Expansion in Operated Unilateral Cleft Palate Patients

Poornima¹

2011

JIOS

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Objective: To evaluate the efficacy of nickel-titanium expander for maxillary expansion and the skeletal and dental changes associated with the expander in operated cleft palate patients. Materials and methods:Ten male unilateral cleft lip and palate patients in the age group of 9 to 13 years with transverse maxillary deficiency and with no history of bone grafting procedure, were selected from the patients visiting the combined cleft lip and palate clinic/orthodontic clinic.Results: Orthopedic expansion of maxillary segments ranged from 2 to 5 mm, constituted 25% of total expansion. Maxillary Intermolar width measured at cuspal tips and palatal gingival margins (T-16, 26 and G-16, 26) increased by a mean of 8.6 mm (p < 0 .001) and 5.4 mm (p < 0 .001). Maxillary Inter premolar width measured at cuspal tips and palatal gingival margins (T-14, 24 and G-14, 24) increased by a mean of 5.6 mm (p < 0.001) and 4.7 mm (p < 0 .001). Maxillary intercanine width measured at cuspal tips and palatal gingival margins (T-13, 23 and G-13, 23) increased by a mean of 4.3 mm (p < 0.01) and 3.38 mm (p < 0.01). Postexpansion changes measured on the mandibular dental casts showed insignificant changes except in the intermolar area. Mandibular intermolar width measured at cuspal tips and lingual gingival margins (T-36, 46 and G-36, 46) increased by a mean of 0.6 mm (p < 0.05). The dental expansion constituted for 75% total expansion. Mandibular, occlusal plane angles increased by 2 to 3° resulting in increased TAFH. Conclusion:NiTi expansion in operated cleft patients, showed mainly orthodontic expansion. The significant change in the maxillary intermolar region is due to the direct placement of NiTi palatal expander to 16, 26.

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“…The majority of achieved expansion can be attributed to tooth and alveolar process tilt. The orthodontic to orthopaedic expansion ratio ranges from 6:1 to 10:1 [22][23][24]. Other authors report it to be 2:1 [25].…”

Section: Orthodontic Approachesmentioning

confidence: 97%