CAJ | 학술논문

目的：采用锥形束CT（CBCT）研究替牙期儿童的下颌骨发育情况，探讨该时期下颌骨整体发育的趋势。方法：对140例6～12周岁替牙期儿童拍摄CBCT图像，使用DolphinImaging11.0软件进行下颌骨三维重建，测量分析包括下颌骨长度、下颌骨宽度等15项线距和6项角度。结果：6～8周岁替牙早期组60例与9～12周岁替牙晚期组80例进行横向比较，发现替牙晚期组数值较替牙早期组增加，其中左侧下颌骨长度（CoL-Gn）[（7.29±0.7）mm]、右侧下颌骨长度（CoR-Gn）[（8.00±0.9）mm]、髁突间距（CoL-CoR）[（3.29±0.8） mm]、喙突间距（CorL-CorR）[（4.76±0.7）mm]、乙状切迹间距（SgL-SgR）[（5.11±0.6）mm]、下颌角间距（GoL-GoR）[（4.83±0.7）mm]、颏孔间距（Mf0L-Mf0R）[（1.65±0.4）mm]、颏孔近颊点间距（Mf1L-Mf1R）[（1.16±0.4）mm]、颏孔远颊点间距（Mf2L-Mf2R）[（2.39±0.4）mm]、颏孔远舌点间距（Mf2’L-Mf2’R）[（1.42±0.6）mm]、左侧下颌体长度（GoL-Gn）[（5.80±0.8）mm]、右侧下颌体长度（GoR-Gn）[（6.95±0.7）mm]、左侧下颌支高度（CoL-GoL）[（4.40±0.5）mm]、右侧下颌支高度（CoR-GoR）[（4.33±0.6）mm]、左侧下颌角（CoL-GoL-Gn）[（3.75±0.4）°]、右侧下颌角（CoR-GoR-Gn）[（5.18±0.3）°]、髁突开张度（CoL-Gn-CoR）[（0.62±0.28）°]、喙突开张度（CorL-Gn-CorR）[（0.68±0.3）°]、乙状切迹开张度（SgL-Gn-SgR）[（0.59±0.27）°]，差异均有统计学意义（P＜0.05）。颏孔近舌点间距（Mf1’L-Mf1’R）几乎不变，下颌角开张度增加（0.32±0.4）°，差异无统计学意义（P＞0.05）。结论：替牙晚期下颌骨各部分长宽高均有所增加（除颏孔近舌点间宽度），不同部位骨组织的增加量不同，下颌骨水平向宽度变化由前至后呈增大趋势，颏孔近中部位下颌骨宽度的增加主要由下颌骨外侧面增生新骨引起，下颌骨整体发育趋势为向下向前向外增大。目的：採用錐形束CT（CBCT）研究替牙期兒童的下頜骨髮育情況，探討該時期下頜骨整體髮育的趨勢。方法：對140例6～12週歲替牙期兒童拍攝CBCT圖像，使用DolphinImaging11.0軟件進行下頜骨三維重建，測量分析包括下頜骨長度、下頜骨寬度等15項線距和6項角度。結果：6～8週歲替牙早期組60例與9～12週歲替牙晚期組80例進行橫嚮比較，髮現替牙晚期組數值較替牙早期組增加，其中左側下頜骨長度（CoL-Gn）[（7.29±0.7）mm]、右側下頜骨長度（CoR-Gn）[（8.00±0.9）mm]、髁突間距（CoL-CoR）[（3.29±0.8） mm]、喙突間距（CorL-CorR）[（4.76±0.7）mm]、乙狀切跡間距（SgL-SgR）[（5.11±0.6）mm]、下頜角間距（GoL-GoR）[（4.83±0.7）mm]、頦孔間距（Mf0L-Mf0R）[（1.65±0.4）mm]、頦孔近頰點間距（Mf1L-Mf1R）[（1.16±0.4）mm]、頦孔遠頰點間距（Mf2L-Mf2R）[（2.39±0.4）mm]、頦孔遠舌點間距（Mf2’L-Mf2’R）[（1.42±0.6）mm]、左側下頜體長度（GoL-Gn）[（5.80±0.8）mm]、右側下頜體長度（GoR-Gn）[（6.95±0.7）mm]、左側下頜支高度（CoL-GoL）[（4.40±0.5）mm]、右側下頜支高度（CoR-GoR）[（4.33±0.6）mm]、左側下頜角（CoL-GoL-Gn）[（3.75±0.4）°]、右側下頜角（CoR-GoR-Gn）[（5.18±0.3）°]、髁突開張度（CoL-Gn-CoR）[（0.62±0.28）°]、喙突開張度（CorL-Gn-CorR）[（0.68±0.3）°]、乙狀切跡開張度（SgL-Gn-SgR）[（0.59±0.27）°]，差異均有統計學意義（P＜0.05）。頦孔近舌點間距（Mf1’L-Mf1’R）幾乎不變，下頜角開張度增加（0.32±0.4）°，差異無統計學意義（P＞0.05）。結論：替牙晚期下頜骨各部分長寬高均有所增加（除頦孔近舌點間寬度），不同部位骨組織的增加量不同，下頜骨水平嚮寬度變化由前至後呈增大趨勢，頦孔近中部位下頜骨寬度的增加主要由下頜骨外側麵增生新骨引起，下頜骨整體髮育趨勢為嚮下嚮前嚮外增大。
목적：채용추형속CT（CBCT）연구체아기인동적하합골발육정황，탐토해시기하합골정체발육적추세。방법：대140례6～12주세체아기인동박섭CBCT도상，사용DolphinImaging11.0연건진행하합골삼유중건，측량분석포괄하합골장도、하합골관도등15항선거화6항각도。결과：6～8주세체아조기조60례여9～12주세체아만기조80례진행횡향비교，발현체아만기조수치교체아조기조증가，기중좌측하합골장도（CoL-Gn）[（7.29±0.7）mm]、우측하합골장도（CoR-Gn）[（8.00±0.9）mm]、과돌간거（CoL-CoR）[（3.29±0.8） mm]、훼돌간거（CorL-CorR）[（4.76±0.7）mm]、을상절적간거（SgL-SgR）[（5.11±0.6）mm]、하합각간거（GoL-GoR）[（4.83±0.7）mm]、해공간거（Mf0L-Mf0R）[（1.65±0.4）mm]、해공근협점간거（Mf1L-Mf1R）[（1.16±0.4）mm]、해공원협점간거（Mf2L-Mf2R）[（2.39±0.4）mm]、해공원설점간거（Mf2’L-Mf2’R）[（1.42±0.6）mm]、좌측하합체장도（GoL-Gn）[（5.80±0.8）mm]、우측하합체장도（GoR-Gn）[（6.95±0.7）mm]、좌측하합지고도（CoL-GoL）[（4.40±0.5）mm]、우측하합지고도（CoR-GoR）[（4.33±0.6）mm]、좌측하합각（CoL-GoL-Gn）[（3.75±0.4）°]、우측하합각（CoR-GoR-Gn）[（5.18±0.3）°]、과돌개장도（CoL-Gn-CoR）[（0.62±0.28）°]、훼돌개장도（CorL-Gn-CorR）[（0.68±0.3）°]、을상절적개장도（SgL-Gn-SgR）[（0.59±0.27）°]，차이균유통계학의의（P＜0.05）。해공근설점간거（Mf1’L-Mf1’R）궤호불변，하합각개장도증가（0.32±0.4）°，차이무통계학의의（P＞0.05）。결론：체아만기하합골각부분장관고균유소증가（제해공근설점간관도），불동부위골조직적증가량불동，하합골수평향관도변화유전지후정증대추세，해공근중부위하합골관도적증가주요유하합골외측면증생신골인기，하합골정체발육추세위향하향전향외증대。
dren with mixed dentition by Cone Beam Computed Tomography and discuss the whole trend of mandibular growth.Methods: Cone Beam Computed Tomography scans were performed in 140 subjects from 6 to 12 years old with mixed dentition. CT images were constructed into 3D model using medical image processing software Dolphin Imaging 11.0. Fifteen linear and six angular measurements including mandibular length, mandibular width, etc, were positioned through MPR method and analyzed by SPSS 17.0.Results: Transverse comparison in 6~8 years old for early age group of 60 cases with 9~12 years old for late age group of 80 cases, the measured values were signiifcantly increased in the late age group, including the left mandibular length [(7.29±0.7) mm], the right mandibular length [(8.00±0.9) mm], the condyle spacing [(3.29±0.8) mm], coronoid spacing [(4.76±0.7) mm], sigmoid notch spacing [(5.11±0.6) mm], mandibular angle spacing [(4.83±0.7) mm], mental foramen spac-ing [(1.65±0.4) mm], mental foramen mesial buccal point spacing [(1.16±0.4) mm], mental foramen distal buc-cal point spacing [(2.39±0.4) mm], mental foramen distal tongue point spacing [(1.42±0.6) mm], the left corpus length [(5.80±0.8) mm], the right corpus length [(6.95±0.7) mm], the left ramus height [(4.40±0.5) mm], the Objective: To analyze the three-dimensional characteristics of mandibular growth of the chil-right ramus height [(4.33±0.6) mm], left mandibular angle [(3.75±0.4) o], right mandibular angle [(5.18±0.3) o], condylar strength [(0.62±0.28) o], coracoid strength [(0.68±0.3) o] and sigmoid notch strength [(0.59±0.27) o] signiifcantly (P<0.05). The inner side of mental foramen mesial almost unchanged and mandibular angle strength increased [(0.32±0.4) o], both had no signiifcant difference (P>0.05).Conclusion: Mandibular dimensions are in-creased in the late age group (except mental foramen mesial tongue point width), the increase in different parts of mandibular are different. The change of mandibular width from the former show a trend of increase, mandibular width of mental foramen area in nearly increase is mainly caused by bone hyperplasia in the outside of mandibu-lar. The trend of mandibular growth is downward, forward and outward.