TAP CHI NGHIEN COOJ Y HOC
TV LE VA PHAN B 6 NHAY CAM NGA RANG (y NGU'ai TRU'O'NG THANH TAI THANH P H 6 Hd CHI MINH
Hoang Oao Bao T r a m ^ , Trdn Ngoc Phipomg Thao' 'Trudng Dai hpc Y Dwgc TpHCM. ^Binh viin Ring Ham l\/lit TpHCtil Nhay cam nga li tinh trang pho biin va xuat hi$n ngay eang nhieu a iua tuoi tri. Nghiin cOu mdtacS ngang tien hinh tren 871 nguai tw 18 den 79 tuoi, nhim xac dinh ty IS. mirc dg vi phan b6 nhay cim ng^
rang a nguai truang thanh tai thanh phi Ho Chi Mmh Khim lim sing va chSn doin nhay cam nga ring bing kich thich co xif (50g) vi kich thich thai hai (40 - 65p.s.i. 22 ± ^C). dinh gii theo thang aim 0 - 3 Kit qua cho thay 85,8% nguai co rang nhay cim vai It nhat mgt tmng hai kich thich, trong 06. 47,4%
nh$y cam nga a muc (J5 trung blnh. khac bi$t co y nghia thong ki giO-a cac nhom tuoi (p < 0,001) va giOa cac nhom nghi nghiip (p < 0,05), khdng cd khac biit co y nghTa khi xit theo gidi hoic theo khu vgc ngi va ngoai thanh. s6 rang nhay cam nga trung binh ting theo tuoi. Ty li nhay cam ngi a tung rang thay doi tir 10% din 61%. cao nhat a vung rang coi nho va rang cii ldn thw nhat him dudi vi him trin. thap nhat a vung rang cwa va rang coi lan thw hai ham tren. Nhay cam nga rang li mpt tinh trang pho bien tai thanh pho H6 Chi Minh, gin mpt nOa nguoi trwang thinh cd nhay cam nga a miic dp trung binh. Ty Ip nhay cam ngi cao nhat a Iwa tuoi 40 - 49 Ring thwang nhay cam nga nhat la ring coi nhd vi rang coi ldn thii nhit ham dwdi va ham tren
Tir khoa: nh^y cam nga, ty If, miic dp, phan bd
I. O A T V A N B^
Nhay cam ngd Id mdt tinh trang pho bien vd xudt hidn ngdy cdng nhieu d liia tuoi tre.
Tinh trang ndy thudng Id k i t qua cfla qua trinh mdn men rdng do tac dpng an mdn hoa hpc, mdi mdn do t i l p xflc khdp cdn, co mdn do ma xdt vdi cdc y l u to ngoai lai. hay Id b l mat chdn rang do tgt nudu hodc do can thiep d i l u tri nha chu.
Nhay cam ngd d u a c dinh nghTa la can dau nhdi dien ra rat nhanh tai nhu'ng vflng nga bi 1$, dudi tdc ddng cfla cdc dang kich thich nhu dp lyc, nhidt, bay hai, cp xdt, tham thau, hda chat, md khdng do bdnh ly ndo khdc cua rdng [ 1 , 2] Cac trieu chfl'ng dau va mat t h I m
0/3 chllien he. Ho^ngP^o Bao TrSm, truOng Oai hqc Y duac TP Ho Chi Minh
Email hoangdaobaotram@gmail com Ng^ynh$n 09/01/2015 Ngayduucchap thuin- 31/5/2015
my CO the la nhu'ng ly do d i n bdc sy de dugc chan doan vd d i l u tri trong giai doan sdm.
Tuy nhien,' do hidn t u a n g mdt chat cua mo rdng xudt hien mpt each kin dao vd didn tiln chdm, cdc y l u to nguy c a khd nhdn bilt ddn den nhu'ng han c h i trong cdc k i t qua d i l u tra ldm sdng
Nhieu nghien cfl'u trdn t h l gidi dd duac thyc hidn d l ddnh gid tinh trang nhay cam ngd rang Phdn tdn cdc nghidn ciiu duac tiln hdnh tai cdc bdnh vidn, phdng nha khoa. trong quan dpi, hodc tren mdt nhdm benh nhdn co bdnh nha chu. Tai Viet Nam, mdt so khao s^t v l tinh trang nhay cam ngd rang da duac bdo cdo. nhu nghien c i i u cfla Tdng Minh Son, Dodn Ho Didp vd cdng s y [3 - 5]. Tuy nhidn, cdc nghidn cfl'u ndy hau h i t d u a c thuc hi$n trdn mpt nhdm ddi tup'ng nhu sinh vidn, edn bp nhdn vldn cua mdt dan vi, c a quan. Do dd, cdc s6 lidu thu thdp d u c c cd tinh ddc thfl cua
TCNCYH 94 (2)-2015
• TAP CHl NGHIEN CO'U Y HQC mdu nghidn c i i u . Vide khao sdt ve tinh trang
s i i c khde rdng mipng d cdng ddng, trong dd cd nhay cam ngd rang vd cdc y l u t l lidn quan giflp xdc dtnh md hinh bdnh tdt vd xdy d y n g c h i l n luo'c bao vd vd chdm soc siic khoe rdng mi§ng phu hp'p trong dieu kidn hidn nay.
Nghidn c i i u ndy dup'c thuc hidn nhdm. Xdc djnh ty Id, m i i c dd va phdn bd nhgy cam ngd rang d ngudi trudng thdnh tgi thdnh pho Ho Chi Minh
II. D 6 | TU'Q'NG VA PHU'ONG PHAP
1 . o 6 i t y o n g
DSn so ehgn miu: ngudi ddn tfl- 18 tuoi trd ldn sinh song tai ndi thdnh/ngoai thdnh thdnh phd Ho Chi Minh
Tieu chi chpn miu: ngudi tfl' 18 tuoi c u trfl tai thanh phd Hd Chi Minh lien tuc tfl' 24 thang trd len, siic khde todn thdn vd tdm than on dinh, ddng y tham gia nghidn ciiu. cdn t i i 20 rdng khdng thudc tieu chi rdng bj loai khdi mdu.
Tieu chi loai tru-: ngudi khdng co kha ndng t u tra ldi cdu hdi hodc dang d i l u tn tdm ly. phu nfl' CO thai hodc nudi con bdng sQ'a mg, dang d i l u tri nhay cam ngd hodc dflng thuoc khdng vidm, giam dau trong vdng 2 tudn, cd tram rang, p h i u thudt nha chu. chinh nha trong vdng 3 thdng; doi vdi rdng nghien cfl'u:
rang sdu, niit, be/vd. cd m i l n g tram vflng co rdng hogc lidn quan den mat ngodi, rang chet tuy, rdng bpc mdo/try cau hodc mang cdc phan tua cua phuc hlnh
2. Phu'O'ng phap
Nghien c i i u md ta cdt ngang, dp dung phuang phdp chpn mdu ngdu nhidn phan tang n h i l u cum, l i y mdu xdc suat ty Id vdi kfch thudc.
Ap dung cdng thfl'c tinh c d mdu: n = [z\^.
a/2)P(1 - P)]/d'
z tn so t l i phdn phoi chuan a = 0.05
d: sai so cho phep (0,05) p = 0,5
Ta cd: n = 385
Ap dung hd so t h i l t k l mdu bdng 2; cdng them 10% d y phdng mat mdu, c d mdu nghidn cfl'u xdc dinh bdng: 385 x 2 x 110% = 847 ngudi. Xdt theo ty le vd mat dp ddn so d nOl thdnh va ngoai thdnh, chon n g l u nhidn 30 cum d ndi thdnh vd 8 cum d ngoai thdnh; vdi kfch thudc m l i cum Id 20 ± 5
Phuxyng phSp thu thap so lieu: khdm ldm sdng, chan dodn phan bidt va chan dodn xdc djnh nhgy cam ngd. vdi hai loai kich thich:
kich thich cp xdt bdng thdm trdm vdi lyc tuang d u a n g 50g; kich thich thoi hai sfl' dyng dau xit hai cfla ghe nha khoa (40 - 65p,s.i, 22 ± 2°C), vdi khoang cdeh 1cm theo hudng vudng gdc vdi be mdt co rang mdt ngodi, trong 1 gidy, cdc rang Idn cdn d u a c each ly bdng ngdn tay ngudi khdm Vide kham d u a c thuc hien tren td'ng rdng, theo thd t u tren cung hdm, khoang cdeh nghi giOa cdc rdng Id 5 gidy. Kich thich cp xdt d u a c t i l n hdnh trudc cho ca hai hdm, sau khi hoan thdnh tidp tuc dp dung kich thich thoi hai theo cung thii t u cdc rdng. Muc dd nhay cam ngd d u a c ddnh gid theo thang d i l m 0 - 3 .
Mfl'c dp nhay cam ngd theo phuang phdp cp xdt/thoi hai:
0 = khdng cam thay khd chiu hay dau.
1 = c6 cam thay khd chiu, nhung khong nhilu 2 = cam thay khd chiu hay dau nhieu khi bi kich thich.
3 = cam thay khd chiu va dau nhieu khi bi kich thich, cam gidc ndy keo ddi sau khi kich thich da d u p c loai bo.
Vide khdm duac thyc hien bdi 3 bdc s? dd d u a c huan luygn vd dinh chuan. Luc co xdt d u a c chuan hda b i n g t h i l t bi do lyc Yeaple,
TAP CHi NGHIEN CCTU Y HQC dp lyc hoi d u a c xdc dinh bdng dp sudt ke Cac b i l n sd ghi nhan va md ta trong bdo cdo nay bao gdm:
- Ngudl nhay cam nga, ngudi co it nhdt mpt rdng nhay cam vdi kich thich cp xdt vd/
hodc kich thich thoi hai. Miic dd nhay cam nga cua mdt ngudi la m i i c do cao nhdt duac ghi nhan trdn cdc rdng Ty Id nhay cam ngd duac phdn tich tiieo mdt sd ddc d i l m nhu gidl, ndi thdnh va ngoai thanh. trinh dp hpc vdn, nghe nghiep.
Rdng nhgy cam ngd: rdng nhay cam vdi kich thich cp xat vd/ho^c kich thich thoi hoi. TO" b i l n s6 ndy, xac djnh so rdng nhgy cam ngd cfla mdi ca t h l va sd rdng nhgy cam ngd trung binh d cac nhdm tuoi, ty le vd ddc d i l m phdn b l tren cac rdng cua ham tren vd hdm dudi
3. Xfl" ly s 6 lieu: sd lieu d u a c phan tich bdng phdn m i m Stata 10
4. Oao dipc nghien cu>u
o l tai duo'c Chfl'ng nhdn c h i p thuan cua Hoi dong dgo dfl'c trong nghien cfl'u y sinn hpc. Dgi hoc Y Duo'c Thdnh pho Hd Chi Minh.
s6 10/HDDD, ngdy 16/5/2012
III. K^T QUA
Nghien cfl'u khao sdt ty Id nhay cam ngd rang d ngudi trudng thdnh tat thanh pho H 6 Chi Mmh. thyc hien tfl' thang 6 ndm 2013 d i n thang 6 ndm 2014. Mau nghien cfl'u gom 871 ngudl, tuoi tfl' 18 d i n 79 (35,9 ± 12,4). Trong do. ty le nam vd nfl" t u a n g i i n g la 39,7% vd 60,3%, ndi thdnh vd ngoai thdnh Id 71,8% va 28.2%
Ty le, miPc do va phan bo nhay c a m nga tren cac ddi tu>gmg n g h i e n ci>u
K i t qua ghi nhdn trong 871 ngudi, 747 ngudi cd rdng nhgy cam vdi it nhat mdt trong hai kich thich, c h i l m ty le 85.8% Khi xet theo gidi. ty le nhay cam ngd d nam Id 84,7%, d nu- la 86,5%, khdng co khac biet cd y nghta thdng ke (p > 0,05). Ty le nhay cam ngd d ndi tfidnh Id 84,5%, d ngoai thdnh Id 89%, khdng cd khac biet co y nghla t h i n g ke (p > 0,05).
Xet ve muc dp nhay cam ngd. trong 747 ngudi cd nhgy cam nga rang, 243 ngudi cd nhay cam d m i i c do nhe, chidm 28%, 413 ngudl nhay cam ngd d mu'c dd trung binh, c h i l m 47,4%, vd 91 ngudi nhgy cam ngd d mfl'c dd nhieu, c h i l m 10,4% ( b i l u d l 1)
Bidu d o 1. Ty le cac mipc do nhay cam nga rang (%)
Khi xdt theo tuoi, ty le nhay cam nga thdp nhdt d nhdm 18 den 29 (73.5%), cao nhdt d nhdm 40 d i n 49 (94,9%), khac biet cd y nghTa t h i n g kd giO'a cdc nhdm tuoi (p < 0,001) (bang 1).
TCNCYH 94 (2) - 2015
• TAP CHi NGHIEN Cl>U Y HQC Bang 1. Ty le nhgy cam nga rang (%) d cac nhdm tudi
Tudi (n)
Nhay cam n g ^ Khong nhay cam nga
1 8 - 2 9 t 332 73,5 26,5
30 - 39t 249 93,2 6,8
40 - 49t 156 94,9 5,1
50 - 79t 134 91,8 8,2
M l u 871 85,8 14,2
Khi xet theo trinh 66 hoc van, I<h6ng c6 l<hac biet CO y nghla th6ng ke ve ty le nhay cam ngS gii>a cac nhom 36i tifffng co trinh do hoc van khac nhau (p > 0,05).
D6i voi yeu t6 nghe nghiep, ket qua nghien cuu ghi nhan co khSc biet co y nghTa thong k6 ve ty le nhay cam ng^ rang giO'a cac nhom nghe nghiep (p < 0,05), cao nhit o nhom 66\ tucng huu tri vS noi tro (92,6%)
Ty le va phan bd nhay cam nga tren cdc rang
18-29 30-39 40-49 50-79 Tuoi
Bieu 66 2. S6 rang nhay cam nga trung binh 6- cac nhom tu6i
Bieu do 2 m6 ta so rang nhay cam nga trung binh a cac nhom tuoi Trong do, s6 rang nhay cam nga a nhom tuoi 18 - 29 \i 5,7 ± 5,7 rSng, tang din theo tuoi, o nhom tir 50 tuoi trd I6n, so rang nhay cam ngi la 10,1 ± 5,6 rang, khac biSt co y nghTa thing kS (p < 0,01)
Bieu do 3 mo ta ty IS rSng chi nh^y cam v&i mot trong hai loai kich thich va rang nhay cam vdi ca hai loai kich thich duac sCr dung trong nghign cuu. hJhin chung, rang nhay cam vd'i ca hai logi kich thich chiem ty le cao nhat, ty le rang chi nhay cam vdi kich thich th6i hoi thap hon, va rang chi nhay cam vdi kich thich cp xat chi^m ty l# rat thap. Ty le rang nhay cam nga bao gom rang nhay cam vdi mot trong hai, hoac ca hai loai kich thich. Nhin chung, ty ie nhay cam nga a ham duoi cao hon ham tren, bin trai cao hon ben phai Ty le nSy thay doi tir 10% toi 61%, khac biet CO j nghTa ve ty le nh?y cam nga giiia cic rang Xet theo nhom rang, ty le nhay cam nga cao nhat a vung rang coi nho va rang cdi ldn thu nhat i> ham duoi va ham tren, thap nhit 6 viing rang cCra va rang coi I6n thir hai ham trSn.
TCNCYH 94 (2) - 2015 19
TAP CHI NGHIEN CIPU Y HOC •
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80 60 40 20 0 % •
20 40 60 80
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B i l u d6 3. Phan bd ty le nhay cam nga d rang ham tren va ham d u ^ i H chl nhay cam vdi co xat
|--| chi nhay cam vdi thoi hai nhay cam vdi co xdt va thoi hai
IV. BAN LUAN
Nghien ciJu khao sat tinh trang nhay cam ngd rang d ngudi tnj'dng thdnh. K i t qua cho thdy trong 871 ngudi du'ae khao sdt, 747 ngudi cd rang d u a c chan dodn nhay cam khi kham bdng kich thich thoi hai vd/hoac kich thich cp xat, c h i l m ty Id 85,8%,.trong do 47,4% ngu'di cd rdng nhay cam nga d mfl-c do trung blnh. Ty le nay cao han so vdi k i t qua cfla cdc nghidn cfl'u tren t h l gidi [6]. Trong nghien cfl'u cua Tanni vd cong s u thyc hien trdn 295 ngu'di f u l l tiJ 20 d i n 60, ty Id nhay cam nga la 42,4% d benh nhdn khdm tai khu nha khoa Idm sang tong quat va 60,3% d bdnh nhan khdm tai khu bdnh ly nha chu [7].
d nghien cfl'u cfla Rees va cdng su- khao sat trdn 226 ngudi tuoi tfl' 12 d i n 82, ty le nhay cam ngd Id 67,6% [8], Trong nghidn cfl'u cua Tdng Minh San, khao sat tinh trang nhay cam ngd rdng trdn 155 nhan vidn cdng ty Bao h i l m Nhan tho tai Hd Ndi, ty Id ngudi co nhay cam
ngd rang Id 47,29% [4]. Mdt dd tdi khac thirc hidn tai khoa Rang Hdm Mat. Dai hoc Y Duoc Thdnh phd Hd Chi Minh. khao sat tinh trang nhay cam ngd rdng trdn 100 ngudi tudi Kf 18 d i n 28, k i t qua ghi nhan 47% co nhay cam nga vdi kich thich ludng hai hodc kich thich lanh [5]
Khi xet y l u td gidi, ty le nhay cam nga a n(y cao han d nam, tuy nhidn khdc bidt khdng cd y nghTa t h i n g kd. Trong n h i l u nghidn dsu.
ty Id nhay cam ngd d nfl' cao han d nam. song h i l m khi khdc bidt cd y nghTa [5,9]. Nghien CU'U ndy cung ghi nhdn khdng co khdc biet cd y nghla t h i n g kd v l ty Id nhay cam nga giiJa ndi thdnh va ngoai thdnh. Xet v l n g h l nghiep, ty Id nhay cam ngd cao nhdt d nhdm doi tuang khdng di ldm, huu tri va noi fro (92,6%), khdc biet cd y nghTa t h i n g ke giira cdc nhdm nghe nghidp. Tuy nhidn. khdng thay khac biet cd y nghTa t h i n g kd v l ty le nhay
TCNCYH 94 (2)-2015
• TiflkP CHi NGHIEN CU'U Y H p C cam ngd giu'a cdc nhdm doi t u a n g cd trinh dg
hpc vdn khdc nhau. Phdn tich m d rpng ve mdt s6 y l u t l n h u c h l dp dinh dudng, thdi quen dn udng, ve smh rang midng cd t h l giflp dua ra nhu'ng nhdn dinh ve c a c h l benh sinh, y l u t l nguy ca, y l u td khdi phdt lien quan den tinh trang nhay cam nga trdn cdc nhdm doi tup'ng.
Khi xet theo tuoi, ty 1^ nhpy cam nga thdp nhdt d nhdm 18 d i n 29 (73,5%). cao nhdt d nhdm 40 d i n 49 (94.9%), khdc bidt cd y nghTa thong kd giO'a cdc nhdm tuoi (bang 1). K i t qua nay t u a n g ddng vdi k i t qua cua n h i l u nghidn CU'U tren t h l gidi [8; 9], Cf Viet Nam, nghidn cfl'u tren 2392 can bp, cdng nhan cdng ty than Thong Nhdt, thi xd Cam Pha, tinh Quang Ninh, Tdng Minh San cung ghi nhan ty Id nhay cam ngd rang cao nhat d Ifl'a tuoi tren 40 (50,23%) [3]. Ty Id nhay cam ngd tdng theo mfl'c dd mat c h i t cua md rang ddn den cdc hidn tuang mdn men rdng, tut n u d u , lo ngd vflng co rang vd chdn rdng Ben canh dd, lat cd nhu'ng ca c h l lam giam mfl'c do Id cdc I n g ngd. nhu ca c h l ldng dong tinh the Idm bit cdc ong ngd m d , hay hien t u a n g tao ngd thu" phdt vd xa hda ngd rdng do phan fl'ng bao vd hodc qud trinh tich tuoi.
Khi xet so rdng nhay cam nga, k i t qua cho thdy sd rdng nhay cam ngd trung blnh tang theo tuoi vd khac bidt cd # nghTa thong ke giu'a cdc nhdm tuoi. So rdng nhay cam ngd thap nhdt d nhdm 1 8 - 2 9 tuoi (5,7 + 5.7 rdng), cao nhdt d nhdm 50 d i n 79 tuoi {10,1 + 5,6 rdng) (bieu do 1) Trong nghien cfl'u cfla Tanni va cdng s u , so rang nhay cam d u a c ghi nhdn tu-1 d i n 10 (3,05 ± 2,23) d benh nhdn d i l u tri nha khoa tong qudt vd tfl- 1 d i n 17 (4,05 ± 3.05) a bdnh nhdn nha chu [7],
Nhay cam ngd cd the thdy d bat ky rang ndo, nhdm rdng nhay cam cung thay doi tuy theo nghidn cfl'u vd ddn so nghidn cu'u, vdi cac kieu hinh phdn bo bdnh khdc nhau. Trong
nghidn cfl'u ndy. khi xdt ty le cac rdng cd nhgy cam vdi it n h i t mdt trong hai kich thich, ty Id ghi nhdn d u c c cao n h i t d cac rang coi nho vd rdng c l i Idn thu- nhat d ca hai hdm, tu' 32 d i n 6 1 % . Trong khi dd, cac rdng cu'a vd rdng c l i Idn thfl' hai hdm trdn cd ty Id nhay cam thap nhdt, tfl' 10 d i n 12% ( b i l u d l 3) Ket qua ndy tu'ong dong vdi k i t qua cfla n h i l u nghien cfl'u tren the gidi, Nghidn cfl'u cua Chabanski vd cpng SLf ghi nhdn nhay cam nga thudng gdp nhdt d rdng coi nhd hdm trdn. t i l p theo Id rdng c l i Idn thfl' nhdt ham tren, rang eu-a it nhay cam n h i t [10] Nghien ciiu cua T i n g Mmh Son cung ghi nhdn vi tri rdng co ty Id nhay cam n h i l u nhat Id nhdm rdng coi nhd, ddc biet Id rang coi nhd thfl- nhdt (31.78%) [3].
Ben canh dd, nghien cfl'u cua Gillam vd cpng SU l$i ghi nhdn nhgy cam ngd thu'dng gap nhdt d rdng nanh vd cdc rdng coi nhd [11] Mdt so tdc gia ghi nhdn moi lien quan giu'a tdc dgng tich luy cfla hidn tu'cng u l n rang vd mat lien tuc be mdt rang khu trfl d vflng c6 rdng do phd hfly cdu trflc du'di bd mat Theo thuydt ndy, tinh trang mat chdt d vflng CO rdng b i l u hidn da dang ve hlnh thdi, song cd lidn quan ddn hidn t y a n g uon cfla md rdng, la y l u to khdi phdt ddn d i n nfl't ran men rdng vflng co. Trong cdc chu ky hoat ddng chiJc ndng cua bg rdng, cac rdng coi nho vd rdng c l i Idn t h i j nhdt Id cdc rang chiu phdn b l luc quan trong. Hien tuang u l n Idp lai anh hydng d i n men rdng d u d i tac dgng cfla cdc luc cua hoat d6ng khdp cdn lech tdm gdy mdi va di>t doan cdc tru men vung co rdng. chu y l u d mdt ngoai. Hidn lug'ng u l n do lu'c nen vd keo, tap trung g i n tiep noi men - xe mdng, tao f i l m ndng cho cdc tdc ddng dn mdn do a - xit Sau ran nfl't b l mdt, cdc nguydn nhdn gdy mdn rang khdc t i l p tuc tdc ddng vd hinh thdnh ton thuang co rang, Cdc t i n thu-ang m i t chat d vflng CO rdng chinh Id nhO'ng yeu t l nguy ca
TAP CHi NGHIEN CLFU Y HQC •
tryc t i l p ddn d i n tinh trgng nhay cam ngd rdng. K i t qua nghidn cfl'u dd cho b i l t ty le va mfl'c dg nhay cam ngd d ngudi trudng thanh tai thdnh pho Hd Chi Minh, cd xdt d i n mdt s l y l u t l nhu tuoi, gidt, trinh dd hoc vdn, nghd nghidp; dong thdi md ta d u a c phdn b l ty Id nhay cam ngd tren cdc rdng,
V. K^T LUAN
Nghien cfl'u khao sat ty' Id vd phdn b l nhay cam ngd rang d ngudi trudng thdnh tai Thdnh p h i H i Chi Minh. K i t qua nghien cuu cho thdy nhay cam ngd rdng Id mgt tinh trang pho b i l n tai thdnh pho Ho Chi Mmh. gan mdt nu'a ngudi trudng thdnh cd nhay cam nga d mu'c dd trung blnh. Ty id nhgy cam ngd cao nhdt d Ida tuoi 40 - 49. Rdng thudng nhay cam nga nhat Id rdng c l i nhd vd rdng c l i Idn thfl' nhdt hdm d y d i vd ham trdn.
Lo'i cam cn
Nghien cfl'u thudc de tdi cap Bg Y td, ITnh vuc Y hgc d y phong, 'Ty Id vd cdc ydu to nguy ca mdc chfl'ng nhay cam ngd rdng d mgt vflng sinh thdi (thdnh pho vd ndng thdn)" (2012 - 2014).
Trdn trong cdm an Trydng Dai hgc Y Dug-c thdnh p h i H i Chi IVIinh, bdnh vidn RSng Ham Mat thdnh p h i Ho Chi Minh, vidn Y t l cdng cdng thdnh pho Ho Chi Minh vd cdc dan vj y t l vd ca s d tai dja phyang dd hd tn?. p h l i hap va tgo d i l u kidn thudn lo'i cho chflng toi trong qua trinh trien khai d l tai.
TAI LiEU THAM KHAO
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TCNCYH 94 (2) - 2015
• TAP CH( NGHIEN Cl>U Y H p C
Summary
PREVALENCE AND DISTRIBUTION OF DENTINE HYPERSENSITIVITY IN ADULTS AT HOCHIMINH CITY
Dentine hypersensitivity is in the increase in the young population.This cross - sectional study was conducted on 871 subjects from 18 to 79 years old to evaluate the prevalence, severity and distribution of dentine hypersensitivity in adults at HCM city Dentine hypersensitivity was clinically diagnosed by applying tactile stimuli (50g) and air blast (40 - 65p.s.i, 22 ± 2''C), and was rated using the 0 - 3 scale 747 persons were diagnosed as having dentine hypersensitivity, giving a prevalence figure of 85 8%» including 47.4% who responded to the test stimuli with moderate degree. The difference was significant between different ages (p < 0 001) and profession groups {p < 0.05), but not significant between male and female or between urban and rural area The average number of hypersensitive teeth increases by age 10 to 61 percent responded to air blast and/or to tactile stimuli The distribution of dentine hypersensitivity in tooth types revealed that lower and upper premolars and the first molars were most commonly affected, upper incisors and second molars were the least. Dentine hypersensitivity was common in Hochiminh city, half of the adult population had at least one moderate sensitive tooth. Most commonly affected were individuals between the ages of 40 - 49 and the lower and upper premolars and the first molars Keywords: dentine hypersensitivity, prevalence, severity, distribution