German Study comparing DO and BSSO results after 10 years. It seems like there were no significant differences and both are viable options for Class-2 Patients. I would like to know your opinion on this.
Most of the study is in German, however the abstract is in English. I will paste it here:
The aim of this retrospective study was to compare the long-term stability of the
mandible after a bilateral lengthening procedure, either by bilateral sagittal split
osteotomy (BSSO) or distraction osteogenesis using the "floating bone concept"(DO),
and, furthermore, to evaluate the stomatognathic function, the neurosensory function of
the inferior alveolar nerve and patient satisfaction after ca. 10 years.
40 patients who underwent mandibular advancement surgery at Campus Benjamin
Franklin, Charité - Universitätsmedizin Berlin, between 1996 and 2000 were evaluated
after an average period of 10 years (DO group: 9.25 ± 1.11 years, BSSO group: 10.8 ±
1.15 years); either group, BSSO or DO consisted of 20 patients. Of the 20 patients in
the DO group 14 were female and 6 were male, whereas the BSSO group consisted of
15 female and 5 male patients.
The long-term stability of the mandible was evaluated by analysing cephalometric
radiographs of the patients, which were taken preoperatively, postoperatively and at the
latest examination after long-term follow-up of 9.44 years. Using a questionnaire and
the Helkimo index, the function of the temporomandibular joint was examined
subjectively and objectively.
The neurosensory function of the inferior alveolar nerve
was subjectively assessed by questioning the patient and clinically examined by means
of the thermal sensitivity test, the pointed-blunt test and the two-point discrimination.
The subjective patient treatment satisfaction was assessed by subjective evaluation of
masticatory function, and by establishing subjective patient satisfaction with the
outcome of therapy.
Although the horizontal relapse appeared to be greater in the DO group than in the
BSSO group (P <0.05), the difference in relation to the amount of surgical advancement
of the mandible between the two groups was not significant (P > 0.05).
The position of the mandibular ramus had only changed slightly after advancement (less
than 1 ° in the BSSO patients and 2 º at the DO-patients).
The subjective and objective evaluation of sensory disturbance showed no statistically
significant difference between the DO group and the BSSO group. Regarding the
function of the temporomandibular joint and the mobility of the mandible, a significant
functional improvement could be achieved in both groups. The majority of patients in
both groups were satisfied with the treatment.
Source:
https://d-nb.info/107108867X/34
