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A Comparison of Mixed Dentition Dental Development in Cleft Patients Treated With and Without the Latham-type Appliance

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Purpose: The purpose of this study was to retrospectively evaluate the Latham-type appliance's effect on the development and eruption of posterior teeth during the mixed dentition stage before palatal expansion and secondary alveolar bone graft(s). Methods: The charts of complete cleft lip and palate (CLP) patients treated with and without the Latham-type appliance were screened using the following inclusion criteria: nonsyndromic; CLP; and available panoramic radiographs and clinical photographs in the mixed dentition prior to palatal expansion and secondary alveolar bone grafts. Surgical repair for Latham-type appliance patients followed the Latham-Millard protocol. The differences in outcomes were analyzed using Fisher's exact tests. Results: The sample consisted of 65 patients treated with the appliance (Latham group) and 36 subjects who were not (non-Latham group). Similar incidences were found between the non-Latham group and the Latham group for maxillary second premolar agenesis (11 percent versus 10 percent) and enamel defects in the maxillary arch (17 percent versus 14 percent). The incidence of ectopic permanent maxillary first molars was higher in the Latham group than in the non-Latham group (28 percent versus one percent, P=0.01). Conclusions: A higher incidence of ectopic permanent maxillary first molars was found in patients treated with the Latham-type appliance.
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Keywords: CLEFT LIP AND PALATE; DENTAL DEVELOPMENT; LATHAM APPLIANCE

Document Type: Research Article

Affiliations: 1: President in training, in the Department of Dentistry, Boston Children's Hospital and Harvard School of Dental Medicine, Boston, Mass., USA 2: Associate professor, Department of Orthodontics, The University of Iowa, Iowa City, Iowa, USA;, Email: [email protected] 3: Instructor, in the Department of Dentistry, Boston Children's Hospital and Harvard School of Dental Medicine, Boston, Mass., USA 4: Emeritus Chief of Dentistry, in the Department of Dentistry, Boston Children's Hospital and Harvard School of Dental Medicine, Boston, Mass., USA

Publication date: January 1, 2017

More about this publication?
  • Pediatric Dentistry is the official publication of the American Academy of Pediatric Dentistry, the American Board of Pediatric Dentistry and the College of Diplomates of the American Board of Pediatric Dentistry. It is published bi-monthly and is internationally recognized as the leading journal in the area of pediatric dentistry. The journal promotes the practice, education and research specifically related to the specialty of pediatric dentistry. This peer-reviewed journal features scientific articles, case reports and abstracts of current pediatric dental research.
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