Research On Measurement And Analysis Of Anatomical Structures Related To Implant In Maxillary Posterior Region Of Cone Beam CT

[Objectives] This study intends to cone beam CT examination of normal people and patients with periodontitis. Collecting Maxillary posterior region the bottom of the maxillary sinus alveolar ridge height and width、maxillary lateral bone wall thickness、maxillary sinus mucosal thickness data; Judgment whether maxillary sinus mucosa thickening, observe whether maxillary bone interval. Comparison between data collected, statistical thickening of sinus mucosa and the incidence rate of sinus interval, in order to maxillary posterior region planted after surgery and maxillary sinus lift preoperative design provide clinical reference.[Methods] In January 2014 to January 2015 between came to my clinic, choosing complete dentition、no history of trauma、tumors and malformations of maxillofacial and operation treatment history, age between the ages of 30-88, the shooting of CBCT patients a total of 78 cases, In 39 normal cases,39 cases of patients with periodontitis. Use of CBCT software comes with a measuring ruler to measure the maxillary posterior region the bottom of the maxillary sinus alveolar ridge height and distance up 2 mm the width on the top of the alveolar ridg、distance from the bottom of the maxillary sinus low vertically up 5mm place the lateral bone wall thickness、the maxillary sinus mucosal thickness data; Judgment whether maxillary sinus mucosa thickening, Observe whether maxillary bone interval. Measurement, judgment and observation after using SPSS 17.0 statistical analysis.[Results]The first part:1. Normal people and patients with periodontitis of two experimental group on Maxillary posterior region alveolar ridge height respectively:Coronal:11.9mm,9.3mm; Sagittal:12.6mm,9.3mm.The two experimental group the second premolar, the first molar and the second molar height respectively:15.1mm、10.4mm、10.1mm; 11.6mm, 8.6mm,8.3mm.The two experimental group height respectively:11.9mm,9.3mm.2. The maxillary posterior region distance the alveolar ridge crest 2mm place the average width of normal people:13.4mm, for patients with periodontitis: 12.8mm.The two experimental group in the maxillary the second premolar, the first molar, the second molar width respectively:11.3mm,13.7mm,14.3mm.The second part:1. Distance from the bottom of the maxillary sinus low vertically up 5mm place the lateral bone wall average thickness of normal human:2.6mm. for patients with periodontitis:2.1mm.The two experimental group in the maxillary the second premolar, the first molar, the second molar thickness respectively:3.4mm、2.9mm、 1.7mm;2.9mm、2.1mm、1.4mm. The average thickness of periodontitis patients in different age groups respectively:1.8(30-39A)mm、2.2mm (40-59A)、2.1mm (60-88A), Men and women respectively:2.2mm、2.0mm.2. The number of maxillary sinus sinus interval for statistical unit, normal people and patients with periodontitis incidence respectively:47.4%、57.7%. Periodontitis patients with sinus intervals left and right, men and women and different age groups were compared not statistically significant. The normal human maxillary sinus the front、middle、rear sinus interval accounted for the proportion of:11%、74%、 15%;The direction of buccal palatal and near and far are sinus interval the proportion of respectively:90%、10%.3. The number of antral mucosa thickening of the maxillary sinus for statistical unit, Thickening rate respectively:39.7%、9.0%. Periodontitis patients with maxillary sinus mucosal thickening rate in different age groups respectively: 33.3%(30-39A)mm、62.0%(40-59A).68.8%(60-88A)[Conclusions] CBCT can effective application the maxillary posterior region dental implant surgery and maxillary sinus lifting operation preoperative examination, through the measurement and analysis of the experimental object CBCT image, we draw the following conclusions:1. Normal people and patients with periodontitis in CBCT coronal and sagittal images on the measurement of alveolar crest height in maxillary posterior region is the same; The alveolar ridge height from the second premolar to the second molar decreased; Normal people and patients with periodontitis height of alveolar ridge the former than the latter. Maxillary posterior region alveolar ridge width normal person is greater than the patients with periodontitis; And from the second premolar widened in turn to the second molar.2. Normal people and patients with periodontitis of maxillary sinus lateral bone wall thickness the former than the latter. And by the near to far gradually decreased. No difference in periodontitis patients with different age and gender groups between the lateral bone wall of the maxillary sinus bone thickness. Two experimental group the incidence of sinus interval there was no difference. The incidence of men and women, the age of periodontitis patients with maxillary sinus bone interval are independent, the incidence of left and right the same. The normal human bone interval the most common in the middle of maxillary sinus, And Buccal palatal to the travelling of the majority, and the direction of buccal palatal is in the majority. Between normal and periodontitis patients with maxillary sinus mucosal thickening rate of the former is higher than the latter; The incidence rate has nothing to do with the age of periodontitis patients with maxillary sinus mucosal thickening.