Journal article
Restricting facial bone growth with skeletal fixation: A preliminary study
American journal of orthodontics and dentofacial orthopedics, Vol.130(2), pp.218-223
2006
DOI: 10.1016/j.ajodo.2005.11.034
PMID: 16905067
Abstract
Introduction: Conventional orthodontic treatment of vertical or anterior maxillary excess by growth modification can be problematic in children because of the high levels of patient compliance required. The purpose of this preliminary study was to investigate the use of rigid skeletal fixation to modify facial bone growth without compliance.
Methods: Three 30-day old female pigs from the same litter were included in phase I. Pediatric miniplates were rigidly fixated with monocortical screws in the experimental pig to bridge the zygomaticomaxillary suture and both the frontonasal and nasomaxillary sutures, bilaterally. In the sham experimental pig, the same surgical protocol was followed, but miniplates were omitted (ie, screw placement only). In the control pig, surgery was not performed. All 3 pigs were housed and fed a normal diet under identical conditions postoperatively for 63 days; then they were killed, their right hemi-skulls were prepared for and underwent 3-dimensional coordinate landmark analysis, and en-bloc specimens from the zygomaticomaxillary, frontonasal, and nasomaxillary sutures of the left hemi-skulls underwent histologic analysis. Two 50-day-old female pigs from the same litter were used in phase II. The same experimental protocol was followed as before for the experimental pig and the sham experimental pig. Both pigs were fed a normal diet for 105 days; then they were killed, and their skulls were prepared for and underwent 3-dimensional coordinate landmark analysis.
Results: Rigid plating restricted zygomaticolacrimal suture length, maxillary bone length, nasal bone length, midfacial breadth, and frontal bone length by an average of −14% to −15% (range, −4% to −36%). No growth differences were noted between the animals in maxillary height, mid-premaxillary length, bregma-lambda length, palatal lengths, or mandibular length. Also, plating the sutures produced a clear depressed concavity in the infraorbital region, altered the alignment of the infraorbital plane lateral to the concavity, inhibited the anterior migration of the maxillary tuberosity, and resulted in raised folding on the bony surface adjacent to the zygomaticomaxillary suture.
Conclusions: Rigidly fixating frontonasomaxillary and zygomaticomaxillary sutures inhibits growth of facial bones and might provide a means of restricting excess growth without having to rely on patient compliance. In addition, these altered growth patterns in the plated pig model produced similar and potentially homologous infraorbital features shared by living humans in comparison with ancestral fossil forms.
Details
- Title: Subtitle
- Restricting facial bone growth with skeletal fixation: A preliminary study
- Creators
- Thomas E Southard - Professor and head, Department of Orthodontics, University of Iowa, Iowa CityRobert G Franciscus - Associate professor, Department of Anthropology, University of Iowa, Iowa CityKirk L Fridrich - Professor and head, Department of Oral and Maxillofacial Surgery, University of Iowa, Iowa CityMary Ann Nieves - Associate professor and director, Veterinary Teaching Hospital, Department of Veterinary Clinical Sciences, Iowa State University, AmesJohn C Keller - Dean, Graduate College, University of Iowa, Iowa CityNathan E Holton - Doctoral candidate, Department of Anthropology, University of Iowa, Iowa CityKenneth E Krizan - Research assistant, Dows Institute for Dental Research, University of Iowa, Iowa CitySteven B Reimer - Assistant professor, Veterinary Teaching Hospital, Department of Veterinary Clinical Sciences, Iowa State University, AmesSteven D Marshall - Adjunct associate professor, Department of Orthodontics, University of Iowa, Iowa City
- Resource Type
- Journal article
- Publication Details
- American journal of orthodontics and dentofacial orthopedics, Vol.130(2), pp.218-223
- DOI
- 10.1016/j.ajodo.2005.11.034
- PMID
- 16905067
- NLM abbreviation
- Am J Orthod Dentofacial Orthop
- ISSN
- 0889-5406
- eISSN
- 1097-6752
- Publisher
- Mosby, Inc
- Language
- English
- Date published
- 2006
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Orthodontics; Graduate College Admin and Gen; Anthropology; Anatomy and Cell Biology; President; Craniofacial Anomalies Research Center; Oral and Maxillofacial Surgery; Dental Research
- Record Identifier
- 9984065704002771
Metrics
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