Guckes A D, Roberts M W, McCarthy G R
Department of Prosthodontics, University of North Carolina School of Dentistry, USA.
Pediatr Dent. 1998 Jul-Aug;20(4):278-80.
The objective of this study was to assess the pattern of permanent teeth present in a self-selected sample of 17 female and 35 male patients with ectodermal dysplasia presenting for treatment with dental implants.
Mean age of sample: 18.7 years, age range: 5.9 to 60.9 years. Panoramic radiographs were examined independently by two investigators to determine the permanent teeth present. None of the sample reported extractions of permanent teeth prior to presenting for implants.
Permanent teeth most likely to be present, reported as a percentage of the patient sample with that tooth, were: maxillary central incisors (42%), maxillary first molars (41%), mandibular first molars (39%), maxillary canines (22%), mandibular second molars (17%), maxillary second premolars (15%), and mandibular premolars (12%). Comparing dentition by quadrants, mandibular anterior teeth (canines and incisors) were least likely to be present.
Results support previous findings that the maxillary central incisors, maxillary first molars, mandibular first molars, and maxillary canines are the most conserved teeth in hypodontia. Successful use of osseointegrated implants in the anterior mandibles of most of these patients suggests that habilitation of the mandible with dental implant-supported prostheses is a reasonable option.
本研究的目的是评估17名女性和35名男性外胚层发育不良患者的自选样本中恒牙的情况，这些患者前来接受种植牙治疗。
样本的平均年龄为18.7岁，年龄范围为5.9至60.9岁。两位研究人员独立检查全景X光片，以确定恒牙情况。在前来接受种植牙治疗之前，样本中没有人报告过拔除恒牙。
最有可能存在的恒牙，按该牙齿在患者样本中所占百分比报告如下：上颌中切牙（42%）、上颌第一磨牙（41%）、下颌第一磨牙（39%）、上颌尖牙（22%）、下颌第二磨牙（17%）、上颌第二前磨牙（15%）和下颌前磨牙（12%）。按象限比较牙列，下颌前牙（尖牙和切牙）最不可能存在。
结果支持了先前的研究结果，即上颌中切牙、上颌第一磨牙、下颌第一磨牙和上颌尖牙是牙列缺损中最常保留的牙齿。在这些患者中的大多数人下颌前部成功使用骨整合种植体表明，用种植牙支持的假体修复下颌是一个合理的选择。
