Atotal of 54 patients with cervical disc disease who underwent vertebral column autograft with the intervertebral disc were studied before and after surgery by flexion / extension cervical X − ray film and MR1 ,46 patients were operated on at one level and 8 patients were operated on at two levels . Postoperative X − ray film showed some movement in thc operated disc level in aU patients ( average postoperative follow up period was 27 months , ranging over a period of l year to 4 years lmonth ) . A significant decrease in motion in the extension position was observed postoperatively( Pく 0. 0001 ) , but there was no significant difference between the preoperative motion and postoperative motion in the flexion position . Our postoperative MRi examination showed no degenerative changes because a high intensity of implanted intervertebral disc tissue was preserved . However , because the observation peri 〔 ⊃ds were short , further follow up research is required to confirm the extent of the preservation of implanted tissues .
The authors describe the results of surglcal treatment for osslficati ()n of the posterior longitudina 凵 igament of the cervicaI spine , This series consisted of 50 patients who underwem anterior decompresg , ion with an 吐 erior cervical fusion using b〔 }ne grafts obtained from cervical vertebral bodies , and 5 patients who underwent expansive laminoplasty or Iaminectomy as a method of posterior decompression . Twelve out of 50 patients were operated for anterior cervical fusion at onc level , 29 at two levels跏 d g aUhree levels . The p 飢 ients werc ou [of hed within one day postoperatively with a soft collar lbr two months 」 n all patients 、 the symptonls improved postoperativeiy . Postoperative X − ray filins showed solid bone fusion in all patients with anterior cervical fusk)n at a mean f〔 }110w up timc of 2 ycars and nine months 〔 range 6 months k, 6years and one month) . Anterior angulation was found in olle out of nine patients (ll%) with thrce − lcvel fusions , Concerning the meIhod of operation . thc authors thlnk that と mterior decompression and fusk〕n shou ] d be applied to cases of o ∬ ification of up to three consecutive vertcbrac with cithcr one lcve 且fusk }n 〔 〕r 【 wo level l ' usi (ms . Poslerk }r decompression is applied in cases in which anteric 〕r dec 〔 }mpression is not indicative . If Ilecessary , a two − stage combined decompression is recomnlended ,
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