Objective To evaluate the effect of sensory disturbance after the sagittal split ramus osteotomy (SSRO）on quality of life. Methods From September2004 to September 2005, 21 patients undergoing SSRO were studied by using questionnaires. There were 12 males and 9 females, aging 1927 years(mean 22.6 years).The patients were followed up at 4 weeks and 24 weeks after operation. The subjective questionnaire was completed by patient to evaluate the degree of living quality descending. Results At 4 weeks,19(90.48%) patients’ living quality descended because of postoperative sensory disturbance. Among them, 7(33.33%) patients had severe descending of living quality. The average effecting time of living accounted for total time 26.9%(about 6.5 h/d). At 24 weeks, 12(6316%) patients’ living quality descended because of postoperative sensory disturbance, 7(36.84%) patients could achieve preoperative living quality. The average effecting time of living accounted for total time 15.5%(about 3.7 h/d). Conclusion Most patients have descending of living quality after SSRO because of sensory disturbance. However, this condition can be improved during the followup and more than 1/3 patients canachieve their preoperative living quality.
Objective To explore the indication, advantage and disadvantage of modified or classical technique of intraoral sagittal split ramus osteotomy (SSRO) for correction of mandibular prognathism. Methods From January 1997 to January 2005, 95 patients suffering from mandibular prognathism or accompanied by other deformities were treated with modified or classical technique of intraoral SSRO. Of 95 cases, there were 34 males and 61 females, aging 15 to 44 years, including 53 cases of single mandibular prognathism, 28 cases accompanied with mandibular deviation, 11 cases accompanied with maxillaryretrognathism, 2 cases accompanied with glossacele and 1 case accompanied with malar protrution. X-ray cephalometry showed: sella-nasion-A point(SNA) 80-83°, sella-nasion-B point(SNB) 80-84°, A point-nasion-B point(ANB)-3-1°.Fortythree cases were corrected by modified SSRO and 52 cases by classical SSRO. Results The face appearance and dental articulation of all the patients were improved greatly. In patients by classical SSRO, disorder of local sensibility occurred in 9 cases, mandibular fracture during the cleavage ofthe ascending ramus in 1 case, significant bleeding in 1 case, postoperative infection in 1 case and postoperative relapse in 3 cases. In patients by modifiedSSRO, disorder of local sensibility occurred in 2 cases and postoperative relapse in 1 case; no mandibular fracture, significant bleeding, postoperative infection and other complications occurred. With a follow-up of 3 months to 7 years, X-ray cephalometry showed SNA 81-83°, SNB 78-81°and ANB 1-4°. 〖WTHZ〗Conclusion Modified SSRO is an ideal method of correcting mandibular prognathism, especially severer mandibularprognathism accompanied by mandible deviation deformity.