搜索结果: 1-13 共查到“口腔正畸学 Premolar extraction”相关记录13条 . 查询时间(0.281 秒)
Influence of First Premolar Extraction on Mandibular Third Molar Angulation
Premolar extractions Third molar angulations
2010/3/9
Objective: To compare the angular changes in the developing mandibular third molars in both first premolar extraction and nonextraction cases and to determine whether premolar extraction results in a ...
An Analysis Of Second Premolar Extraction Procedures
Analysis Second Premolar Extraction Procedures
2009/3/13
An Analysis Of Second Premolar Extraction Procedures.
The effect of mandibular first premolar extraction on third molar space
Premolar extraction Molar space Crowding
2009/1/23
Change in molar space is compared in 48 mandibular first premolar extraction cases and 46 non-extraction cases over a five year period. Significantly greater increase in molar space is found in extr...
Mandibular second premolar extraction — postretention evaluation of stability and relapse
Postretention Relapse Stability Serial extraction Second premolars
2009/1/14
The dental casts and cephalometric radiographs of 46 patients, treated with mandibular second premolar extraction and edgewise orthodontic mechanotherapy, were evaluated for changes over a minimum...
The effects of premolar-extraction: A long-term comparison of outcomes in“clear-cut”extraction and nonextraction Class II patients
Premolar extraction Nonextraction Profile Craniomandibular disorders Growth Relapse
2009/1/13
Discriminant analysis was used to assess the anatomical basis of the extraction/nonextraction decision in 238 former Saint Louis University Class II edgewise patients. The resulting discriminant s...
Early versus late treatment of crowded first premolar extraction cases：Postretention evaluation of stability and relapse
Postretention Relapse Stability Early orthodontic treatment Late orthodontic treatment
2009/1/7
The purpose of this study was to evaluate the differences in the long-term stability of orthodontically induced changes in arch form between patients who receive early orthodontic treatment (Hellm...
Comparison of soft tissue profile changes in serial extraction and late premolar extraction
Soft tissue profile Serial extraction First premolar extraction
2009/1/4
To assess soft tissue profile changes through time, a comparison was made of patients treated by serial extraction without subsequent orthodontic treatment (n=28), patients treated with serial ext...
An Occlusal and Cephalometric Analysis of Maxillary First and Second Premolar Extraction Effects
Premolar extractions Arch dimensions Incisor retraction
2008/12/26
The purpose of this study was to examine dimensional changes in the maxillary arch following the extractions of maxillary first or second premolars. Pre- and posttreatment records of 71 patients t...
The Effects of Commonly Prescribed Premolar Extraction Sequences on the Curvature of the Upper and Lower Lips
Lateral facial profile Premolar extractions Lip curvature Lip depth
2008/12/19
The potential for premolar extractions to produce adverse facial effects after orthodontic treatment is still controversial. Detailed documentation of the predictability, or otherwise, of various ...
Screw-type Implants Used as Anchorage for Lingual Orthodontic Mechanics: A Case of Bimaxillary Protrusion with Second Premolar Extraction
Lingual orthodontics Titanium screw Anchorage
2008/12/16
We present a case of bialveolar protrusion treated with second premolar extraction. The patient did not agree to placement of a visible labial appliance or to the use of a headgear. Therefore, a lin...
Lip Curve Changes in Females with Premolar Extraction or Nonextraction Treatment
Premolar extraction Nonextraction Soft tissue
2008/12/8
Changes in lip curvature resulting from treatment have been largely ignored in orthodontic literature. The focus instead has been primarily directed at retraction of the vermilion border and changes...
First or Second Premolar Extraction Effectson Facial Vertical Dimension
Vertical dimension Premolar extraction Wedge effect
2008/11/26
If the concept of mesial movement of molars to reduce the “wedge effect” and decrease facial vertical dimension (FVD) is valid, it is important to investigate the effect of first (P1) and second pre...
Incisal and Soft Tissue Effects of Maxillary Premolar Extraction in Class II Treatment
Class II Premolar extractions Lip changes
2008/11/7
Objective: This retrospective study was designed to show likely upper incisal and soft tissue lip changes accompanying Class II fixed appliance treatment with only two upper premolar extractions and t...