Universität zu Köln

Praeger, Thomas Michael, Brochhagen, Hans Georg, Mischkowski, Robert, Jost-Brinkmann, Paul-Georg and Mueller-Hartwich, Ralf (2014). Assessing bone volume for orthodontic miniplate fixation below the maxillary frontal process. J. Orofac. Orthop., 75 (5). S. 399 - 409. MUNICH: URBAN & VOGEL. ISSN 1615-6714

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Abstract

The maxillary bone below the frontal process is used for orthodontic anchorage; indications have included skeletally anchored protraction of the maxilla for treating Class III malocclusions or the intrusion of teeth in patients with a deep bite. This study was conducted to assess the condition of bone before cortically implanting miniplates in that area of the maxilla. A total of 51 thin-sliced computed tomography scans of 51 fully-dentate adult patients (mean age 24.0 +/- 8.1 years; 27 men and 24 women) obtained prior to third-molar osteotomy were evaluated. Study parameters included total bone thickness, thickness of the facial cortical plate, and width of the nasal maxillary buttress. All these parameters were measured at different vertical levels. The bone volume adjacent to the piriform aperture was most pronounced at the basal level and decreased progressively toward more cranial levels. The basal bone structure had a mean total thickness of 7.8 mm, facial cortical plate thickness of 1.9 mm, and nasal maxillary buttress width of 9.2 mm. At 16 mm cranial to the aperture base, these values fell to 5.6 mm, 1.3 mm, and 5.8 mm, respectively. These bone measurements suggest that screws 7 mm in length can be inserted at the base level of the piriform aperture and screws 5 mm long at the cranial end of the bone.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Praeger, Thomas Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Brochhagen, Hans Georg UNSPECIFIED UNSPECIFIED UNSPECIFIED Mischkowski, Robert UNSPECIFIED UNSPECIFIED UNSPECIFIED Jost-Brinkmann, Paul-Georg UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller-Hartwich, Ralf UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-430295
DOI:	10.1007/s00056-014-0234-8
Journal or Publication Title:	J. Orofac. Orthop.
Volume:	75
Number:	5
Page Range:	S. 399 - 409
Date:	2014
Publisher:	URBAN & VOGEL
Place of Publication:	MUNICH
ISSN:	1615-6714
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MANDIBULAR SYMPHYSIS; LINEAR MEASUREMENTS; FACEMASK THERAPY; SUCCESS RATE; MINISCREWS; ANCHORAGE; PROTRACTION; AUGMENTATION; IMPLANTS Multiple languages Dentistry, Oral Surgery & Medicine Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43029