北京大学学报（医学版）
北京大學學報（醫學版）
북경대학학보（의학판）
JOURNAL OF BEIJING MEDICAL UNIVERSITY(HEALTH SCIENCES)
2015年
3期
514-520
,共7页
锥束计算机体层摄影术%错牙合%牙槽骨质丢失%双颌前突
錐束計算機體層攝影術%錯牙閤%牙槽骨質丟失%雙頜前突
추속계산궤체층섭영술%착아합%아조골질주실%쌍합전돌
Cone-beam computed tomography%Malocclusion%Alveolar bone loss%Bimaxillary protrusion
目的：：应用锥形束CT ( cone-beam computed tomography, CBCT)评价治疗前双颌前突患者前牙区牙槽骨缺损情况。方法：选取50名未经正畸治疗的患者,根据年龄分为成人组[30例,平均(22.9±4.2)岁]与青少年组[20例,平均(13.1±1.0)岁],其中成人组根据垂直骨面型分为低角组(9例)、均角组(11例)与高角组(10例),所有患者在相同参数条件下进行CBCT扫描,在其CBCT图像上诊断牙槽骨开窗与开裂的情况并分析其分布特征。结果：双颌前突患者发生牙槽骨缺损的人数比为94.00%。所有接受检验的牙齿牙槽骨缺损发生率为38.60%。牙槽骨缺损绝大多数发生在唇侧(98.66%)；牙槽骨开窗主要发生在上颌,而骨开裂主要发生在下颌。青少年组牙槽骨开裂(3.06%)及骨缺损(30.13%)发生率明显低于成人组的骨开裂(11.73%)及骨缺损(42.46%)发生率,P<0.05；而两组的牙槽骨开窗发生率差异无统计学意义(P>0.05)。低角组骨开窗(22.22%)的发生率低于均角组(33.84%)和高角组(37.50%),P<0.05。牙槽骨缺损发生率最低的牙位为上颌中切牙。结论：双颌前突患者在正畸治疗前即存在广泛的牙槽骨缺损,缺损的发生率受年龄、垂直骨面型等因素影响。
目的：：應用錐形束CT ( cone-beam computed tomography, CBCT)評價治療前雙頜前突患者前牙區牙槽骨缺損情況。方法：選取50名未經正畸治療的患者,根據年齡分為成人組[30例,平均(22.9±4.2)歲]與青少年組[20例,平均(13.1±1.0)歲],其中成人組根據垂直骨麵型分為低角組(9例)、均角組(11例)與高角組(10例),所有患者在相同參數條件下進行CBCT掃描,在其CBCT圖像上診斷牙槽骨開窗與開裂的情況併分析其分佈特徵。結果：雙頜前突患者髮生牙槽骨缺損的人數比為94.00%。所有接受檢驗的牙齒牙槽骨缺損髮生率為38.60%。牙槽骨缺損絕大多數髮生在脣側(98.66%)；牙槽骨開窗主要髮生在上頜,而骨開裂主要髮生在下頜。青少年組牙槽骨開裂(3.06%)及骨缺損(30.13%)髮生率明顯低于成人組的骨開裂(11.73%)及骨缺損(42.46%)髮生率,P<0.05；而兩組的牙槽骨開窗髮生率差異無統計學意義(P>0.05)。低角組骨開窗(22.22%)的髮生率低于均角組(33.84%)和高角組(37.50%),P<0.05。牙槽骨缺損髮生率最低的牙位為上頜中切牙。結論：雙頜前突患者在正畸治療前即存在廣汎的牙槽骨缺損,缺損的髮生率受年齡、垂直骨麵型等因素影響。
목적：：응용추형속CT ( cone-beam computed tomography, CBCT)평개치료전쌍합전돌환자전아구아조골결손정황。방법：선취50명미경정기치료적환자,근거년령분위성인조[30례,평균(22.9±4.2)세]여청소년조[20례,평균(13.1±1.0)세],기중성인조근거수직골면형분위저각조(9례)、균각조(11례)여고각조(10례),소유환자재상동삼수조건하진행CBCT소묘,재기CBCT도상상진단아조골개창여개렬적정황병분석기분포특정。결과：쌍합전돌환자발생아조골결손적인수비위94.00%。소유접수검험적아치아조골결손발생솔위38.60%。아조골결손절대다수발생재진측(98.66%)；아조골개창주요발생재상합,이골개렬주요발생재하합。청소년조아조골개렬(3.06%)급골결손(30.13%)발생솔명현저우성인조적골개렬(11.73%)급골결손(42.46%)발생솔,P<0.05；이량조적아조골개창발생솔차이무통계학의의(P>0.05)。저각조골개창(22.22%)적발생솔저우균각조(33.84%)화고각조(37.50%),P<0.05。아조골결손발생솔최저적아위위상합중절아。결론：쌍합전돌환자재정기치료전즉존재엄범적아조골결손,결손적발생솔수년령、수직골면형등인소영향。
Objective:To investigate the alveolar bone defects of anterior alveolar bone in patients with bimaxillary protrusion by using cone-beam computed tomography ( CBCT ) . Methods: The samples consisted of 50 patients with bimaxillary protrusion, who were assigned to the teenage group[20 cases, (13. 1 ± 1. 0) years] and adult group[30 cases, (22. 9 ± 4. 2) years] . The adult group included 9 hy-po-divergent, 11 normo-divergent and 10 hyper-divergent patients. The images were obtained by using NewTom VG CBCT and the alveolar defects were evaluated. Results:The ratio of the patients had alveo-lar bone defects was 94. 00%. Meanwhile, the defects were associated with 38. 60% of all the teeth. Most defects occurred on labial alveolar bone ( 98 . 66%); fenestration was found more in the maxillary alveolar region and dehiscence occurred more in the mandible. The dehiscences (3. 06%) and defects prevalence (30. 13%) of the teenage group were significant lower than those of the adult group (11. 73% vs. 42. 46%), P<0. 05; while there was no significance of the fenestrations prevalence between the two group (P>0. 05). The hypo-divergent group had lower fenestrations prevalence (22. 22%) than the normo-divergent (33. 84%) and hyper-divergent groups (37. 50%), P<0. 05. The upper central incisor had the lowest alveolar bone defect prevalence. Conclusion: Alveolar bone defects are common findings in patients with bimaxillary protrusion before orthodontic treatment. The prevalence of defects is affected by age and vertical-growth type.
