Maxillary molar distalization with miniplates assessed on digital models: A prospective clinical trial

2007 ◽  
Vol 132 (3) ◽  
pp. 373-377 ◽  
Author(s):  
Marie A. Cornelis ◽  
Hugo J. De Clerck
2020 ◽  
pp. 105566562096618
Author(s):  
Khadega Ali Al Khateeb ◽  
Mai Aboul Fotouh ◽  
Fatma Abdelsayed ◽  
Fady Fahim

Objectives: The purpose of this study was to evaluate the short-term effect of series of preadjusted vacuum formed nasoalveolar molding VF NAM aligners on the morphology of nose, lip, and maxillary arch in infants with unilateral cleft lip and palate (UCLP). Design: Prospective clinical trial. Setting: Unilateral cleft lip and palate patients referred to outpatients’ clinic. Patients: Sixteen nonsyndromic infants with UCLP, less than 2 months of age were included from April 2017 to April 2018. Interventions: All infants received VF NAM therapy. Standardized digital frontal and basilar photographs and 3D digital models were taken before initiation of VF NAM therapy (T1) and after completion of VF NAM therapy (T2). Main Outcome Measure(s): Changes in morphology of the nose, lip, and maxillary arch. Results: Statistical analysis comparing T1 and T2 measurements was performed. Frontal and basilar photographic analysis showed a statistically significant reduction of columella displacement, interlabial gap distance, and nostril width at cleft side (CS), while the nasal height, nostril height at CS, nostril width at noncleft side (NCS), columella deviation angle, nasal tip protrusion, and nostril area at both CS and NCS increased significantly with VF NAM therapy. The nasal width, nostril height at NCS showed no significant change after presurgical VF NAM aligners therapy. The analysis of digital models demonstrated a statistically significant reduction of alveolar cleft width, anterior arch width, arch length, midline deviation, and palatal cleft width, while the posterior arch width and arch perimeter increased significantly with VF NAM therapy. Conclusion: Vacuum formed NAM therapy was effective in reducing the nasoalveolar deformities associated with infants with UCLP and improved the alveolar morphology and nasal symmetry.


Author(s):  
Gero Stefan Michael Kinzinger ◽  
Jan Hourfar ◽  
Jörg Alexander Lisson

Abstract Purpose Conventional anchorage with exclusively intraorally anchored appliances for non-compliance molar distalization combines a palatal acrylic button with periodontal anchorage. This type of anchorage is critically discussed because of the temporary hygienic impairment of the palate and the uncertain anchoring quality of the button. A purely dentally/periodontally anchored Pendulum K appliance was developed, which is exclusively anchored via four occlusal rests. The aims of this pilot study were to examine the suitability of the skeletonized Pendulum K for distalization of maxillary molars, and to investigate the quality of this alternative anchoring modality. Patients and methods In all, 10 patients received skeletonized Pendulum K appliances attached to all maxillary premolars for bilateral molar distalization. Supporting anchorage through an acrylic button adjacent to the anterior palate was not used. The pendulum springs were initially activated on both sides with a distalization force of 220 cN each and provided with uprighting and toe-in bends. The specific force/moment system was regularly reactivated intraorally by adjustment of the distal screw. Results The study demonstrates the suitability of the skeletonized Pendulum K appliance for the distalization of maxillary molars (3.28 ± 0.73 mm). Side effects on the molars were slight distal tipping (3.50 ± 2.51°/PP, 3.00 ± 1.41°/SN) and mesial inward rotation (average 2.75 ± 7.50° and 4.50 ± 12.77°). Significant anchorage loss occurred in the form of mesialization of the incisors by 1.40 ± 0.82 mm and of the first premolars by 2.28 ± 0.85 mm. Conclusion The skeletonized Pendulum K appliance allows compliance-free upper molar distalization. Exclusively dental/periodontal anchorage resulted in a lower percentage of molar distalization compared to a conventional anchoring preparation of the Pendulum K with a palatal acrylic button. Anchorage loss had a comparatively stronger effect on the anchoring premolars but less on the incisors. Typical side effects on the molars such as distal tipping and mesial inward rotation were remarkably low.


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