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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