武警医学
武警醫學
무경의학
Medical Journal of the Chinese People's Armed Police Forces
2015年
9期
929-932
,共4页
咬合%咬合力%咬合接触%咬肌%颞肌
咬閤%咬閤力%咬閤接觸%咬肌%顳肌
교합%교합력%교합접촉%교기%섭기
occlusion%bite force%occlusal contact%masseter muscle%temporal muscle
目的：研究单侧最大紧咬不同硬度物质对咬合力和咬肌、颞肌前束的肌电值的影响。方法在受试者一侧下颌第2前磨牙与第1磨牙上放置聚氯乙烯（polyvinyl chloride，PVC）软片，对侧同名牙放置面团期丙烯酸树脂（acrylic resin， AR），最大紧咬时制取丙烯酸树脂片为硬物；使用T－ScanⅢ咬合分析仪和Bio－Pak肌电图仪测量受试者在牙尖交错位（ intercus－pal position， ICP）和单侧咬合软硬物下双侧最大紧咬时的咬合力和咬肌（ masseter muscle， MA）、颞肌前束（ temporalis－anterior muscle， TA）的肌电值。结果（1）ICP最大紧咬时，双侧MA肌电值、双侧TA肌电值均无明显差异（P＞0．05）；（2）单侧最大紧咬时，咬合侧与咬合对侧MA肌电值无明显差异（P＞0．05）；而咬合侧TA肌电值分别为（147．75±31．37）μν、（145．70±35．08）μν，均明显大于咬合对侧（115．87±24．08）μν、（121．24±22．78）μν，差异均有统计学意义（P＜0．05）；（3）单侧最大紧咬时，MA肌电值与ICP最大紧咬时相比差异无明显统计学意义，咬合对侧TA肌电值（147．75±31．37）μν和（145．70±35．08）μν均明显小于ICP最大紧咬时的TA肌电值（136．88±29．54）μν，差异有统计学意义（P＜0．05）；（4）单侧咬合时，所有受试者（20／20例）均出现了咬合对侧接触现象。单侧最大紧咬时软物的咬合力为（9174．60±955．29） raw，明显大于硬物的咬合力（6156．70±979．27）raw，差异有统计学意义（P＜0．05）；但软物最大紧咬时的MA和TA肌电值分别与硬物比较差异无统计学意义。结论与硬物相比，软物对咬合力的影响相对较小，但不同硬度咬合物对咀嚼肌肌电值无明显影响。
目的：研究單側最大緊咬不同硬度物質對咬閤力和咬肌、顳肌前束的肌電值的影響。方法在受試者一側下頜第2前磨牙與第1磨牙上放置聚氯乙烯（polyvinyl chloride，PVC）軟片，對側同名牙放置麵糰期丙烯痠樹脂（acrylic resin， AR），最大緊咬時製取丙烯痠樹脂片為硬物；使用T－ScanⅢ咬閤分析儀和Bio－Pak肌電圖儀測量受試者在牙尖交錯位（ intercus－pal position， ICP）和單側咬閤軟硬物下雙側最大緊咬時的咬閤力和咬肌（ masseter muscle， MA）、顳肌前束（ temporalis－anterior muscle， TA）的肌電值。結果（1）ICP最大緊咬時，雙側MA肌電值、雙側TA肌電值均無明顯差異（P＞0．05）；（2）單側最大緊咬時，咬閤側與咬閤對側MA肌電值無明顯差異（P＞0．05）；而咬閤側TA肌電值分彆為（147．75±31．37）μν、（145．70±35．08）μν，均明顯大于咬閤對側（115．87±24．08）μν、（121．24±22．78）μν，差異均有統計學意義（P＜0．05）；（3）單側最大緊咬時，MA肌電值與ICP最大緊咬時相比差異無明顯統計學意義，咬閤對側TA肌電值（147．75±31．37）μν和（145．70±35．08）μν均明顯小于ICP最大緊咬時的TA肌電值（136．88±29．54）μν，差異有統計學意義（P＜0．05）；（4）單側咬閤時，所有受試者（20／20例）均齣現瞭咬閤對側接觸現象。單側最大緊咬時軟物的咬閤力為（9174．60±955．29） raw，明顯大于硬物的咬閤力（6156．70±979．27）raw，差異有統計學意義（P＜0．05）；但軟物最大緊咬時的MA和TA肌電值分彆與硬物比較差異無統計學意義。結論與硬物相比，軟物對咬閤力的影響相對較小，但不同硬度咬閤物對咀嚼肌肌電值無明顯影響。
목적：연구단측최대긴교불동경도물질대교합력화교기、섭기전속적기전치적영향。방법재수시자일측하합제2전마아여제1마아상방치취록을희（polyvinyl chloride，PVC）연편，대측동명아방치면단기병희산수지（acrylic resin， AR），최대긴교시제취병희산수지편위경물；사용T－ScanⅢ교합분석의화Bio－Pak기전도의측량수시자재아첨교착위（ intercus－pal position， ICP）화단측교합연경물하쌍측최대긴교시적교합력화교기（ masseter muscle， MA）、섭기전속（ temporalis－anterior muscle， TA）적기전치。결과（1）ICP최대긴교시，쌍측MA기전치、쌍측TA기전치균무명현차이（P＞0．05）；（2）단측최대긴교시，교합측여교합대측MA기전치무명현차이（P＞0．05）；이교합측TA기전치분별위（147．75±31．37）μν、（145．70±35．08）μν，균명현대우교합대측（115．87±24．08）μν、（121．24±22．78）μν，차이균유통계학의의（P＜0．05）；（3）단측최대긴교시，MA기전치여ICP최대긴교시상비차이무명현통계학의의，교합대측TA기전치（147．75±31．37）μν화（145．70±35．08）μν균명현소우ICP최대긴교시적TA기전치（136．88±29．54）μν，차이유통계학의의（P＜0．05）；（4）단측교합시，소유수시자（20／20례）균출현료교합대측접촉현상。단측최대긴교시연물적교합력위（9174．60±955．29） raw，명현대우경물적교합력（6156．70±979．27）raw，차이유통계학의의（P＜0．05）；단연물최대긴교시적MA화TA기전치분별여경물비교차이무통계학의의。결론여경물상비，연물대교합력적영향상대교소，단불동경도교합물대저작기기전치무명현영향。
Objective To investigate the influence of different hardness bolus on bite force and the functional characteristics of masseter and temporalis-anterior muscle during unilateral maxmal biting .Methods PVC film was placed on the surface of mandibular second premolar and the first molar on one side of the subject , the contralateral same teeth were placed in doughy acrylic .Then the a-crylic resin piece was made by maxmal biting .Using T -Scan Ⅲbite analyzer and Bio-Pak EMG the bilateral maximum bite force and masseter and temporalis-anterior muscle activity were measured under ICP and unilateral biting .Results (1) During ICP maxmal bit-ing,no differences was found in EMG activity between bilateral temporalis -anterior muscles or between bilateral masseters .(2) During unilateral maxmal bitting , bilateral side of masseter muscle activity had no obvious difference (P>0.05), but EMG activity of the temporalis-anterior muscle on the biting-side(147.75 ±31.37)μν,(145.70 ±35.08)μνwere higher than that of the contralateral side (115.87 ±24.08)μν,(121.24 ±22.78)μν(P<0.05).(3)During unilateral maxmal biting, masseter muscle activity had no obvi-ous statistically significance when compared with ICP maximal biting (P>0.05), but the contralateral temporalis-anterior muscle val-ues(147.75 ±31.37)μν and (145.70 ±35.08)μν were much smaller than that of ICP maxmal biting (136.88 ±29.54)μν, the difference was statistically significant (P<0.05).(4) Unlateral occlusion, all the subjects (20/20) had the contralateral occlusal contact phenomenon.The bite force of soft bolus (9174.60 ±955.29)raw was bigger than that of he hard bolus (6156.70 ±979.27) raw (P<0.05).But the masseter and temporalis-anterior muscle activity in soft bolus had no obvious difference when compared with hard bolus (P>0.05).Conclusions Compared with hard bolus, the bite force of soft bolus is relatively smaller than that of hard bo-lus, the influence of different hardness of occlusal bolus has no significant effect on masticatory muscle .
