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Evaluation of obstructive sleep apnoea and sleep quality in patients with skeletal class III malocclusion
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Prediction of mandibular position after bilateral sagittal split ramus osteotomy via surgery first approach in patients with mandibular prognathism
(range, 17–31). Polysomnography was performed before treatment. Apnoea–hypopnoea index (AHI), lowest arterial oxygen saturation (LoSpO2 ), cumulative percentage time at SpO2 below 90% during the measurement (CT90), oxygen desaturation index (ODI), longest apnoea time (LAT) and sleep state were measured. Findings: Median and range of measurements was follows: AHI, 0.4/h (0–12.1/h); LoSpO2 , 92% (85–95%); CT90, 0 min (0–0.9 min); ODI, 0.2/h (0–21.6/h); LAT, 0 s (0–25.9 s); rapid eye movement (REM) 20.1% (0–34.1%); NREM, 79.9% (65.9–100%); S1, 6.8% (2.2–22.6%); S2, 60.8% (54.1–70%); S3, 7.9% (0.6–19.3%); S4, 2.4 (0–10.4). One patient was diagnosed with mild OSA. AHI during REM 1.8 (0–21) was higher than AHI during NREM 0.2 (0–9.7). Conclusions: We require attention to OSA in patients with Class III even without the symptoms of OSA and obstruction during REM sleep periods in perioperative orthognathic surgery.
H.K. Oh
http://dx.doi.org/10.1016/j.ijom.2017.02.1107
School of Dentistry, Chonnam National University, South Korea
Duration of orthognathic treatment
Objectives: To predict the mandibular position after bilateral sagittal split ramus osteotomy (BSSRO) via surgery-first approach and following postoperative orthodontic treatment, and to compare it with actual mandibular position in patients with mandibular prognathism. Methods: We evaluated 29 mandibular prognathic patients who underwent BSSRO using lateral cephalograms which were taken in preoperative, immediately after surgery and immediately after debonding. To predict mandibular position at post-treatment stage, we preoperatively measured the increase of vertical dimension on surgical occlusion and calculated mandibular forward movement due to the postoperative clockwise autorotation during postoperative orthodontic treatment. Results: Actual mandibular forward movement (2.1 mm) was significantly greater than preoperatively predicted forward movement (0.9 mm; P 10 mm) or greater vertical dimension increase (>2 mm), even though there was no statistical difference. Conclusions: This study suggested that postoperative mandibular rotational movement and additional relapse should be considered in surgery-first orthognathic surgery.
J. Paunonen ∗ , M. Helminen, T. Peltomäki
compared with preoperative position. Regarding rotational movement, both groups showed inward and inferior rotation 2 weeks after surgery. During retention time both groups rotated to its original condylar axis. However, at 6 months postoperatively, single-jaw group and double-jaw group still showed inward rotation compared with preoperative condylar axis. There is no statistical difference in two groups. Conclusions: This study suggests that, the postoperative condylar positional changes are similar between the single-jaw and doublejaw orthognathic surgery via SFA. http://dx.doi.org/10.1016/j.ijom.2017.02.1105
http://dx.doi.org/10.1016/j.ijom.2017.02.1106 Evaluation of obstructive sleep apnoea and sleep quality in patients with skeletal class III malocclusion K. Ooi ∗ , R. Jokaji, K. Ide, Y. Kobayashi, N. Noguchi, K. Katoh, H. Nakamura, S. Takamichi, M. Nakata, K. Kasahara, S. Kawashiri University of Kanazawa, Kanazawa, Japan Background: Maintenance of airway is most important perioperative management in orthognathic surgery. Obstructive sleep apnoea (OSA) of skeletal class III malocclusion is unknown, however OSA is severe risk of airway obstruction. Objective: The aim of this study was to evaluate OSA and sleep quality in patients with skeletal class III. Methods: Subjects in this study comprised 14 patients with skeletal class III who were treated orthognathic surgery at Kanazawa University Hospital, Kanazawa, Japan. They had no symptoms of OSA. The median age at the time of examination was 23 years
Tampere University Hospital, Tampere, Finland Background: One of the most important factors influencing patient’s post-treatment satisfaction in orthognathic treatment is the accuracy and comprehension of information patient has received. For adult patients it is important to know the total duration of the treatment and particularly how long orthodontic treatment takes. Objectives: The aim was to study the duration of orthognathic treatment conducted with conventional pre- and postsurgical orthodontic treatment phases. Methods: Study material comprised files of 185 patients who had undergone orthognathic treatment at the Oral and Maxillofacial Unit, Tampere University Hospital, Finland between 2007 and 2014. Data was obtained on gender and age, duration of presurgical treatment (until operation), duration of postsurgical treatment (from operation until fixed orthodontic appliances were removed), information about orthodontic tooth extractions and type of surgery. Pretreatment digital cephalograms were used to study severity of malocclusion. Findings: Average presurgical and postsurgical treatment durations were 26 months and 8 months, respectively. If orthodontic treatment included tooth extractions, duration of presurgical treatment was in the average 10 months longer (P < 0.001, linear regression). Age (range 17–70 years) or initial severity of malocclusion did not affect treatment time. Treatment duration was almost the same in each type of surgery (Le Fort I osteotomy 2.6 years, bilateral sagittal split osteotomy 2.8 years and bimaxillary osteotomy 2.8 years). Conclusions: Orthodontic extractions have clinically important impact on the duration of orthognathic treatment. Initial severity of malocclusion, type of surgery, age or gender of patients does not seem to have an impact on treatment time. http://dx.doi.org/10.1016/j.ijom.2017.02.1108
Prediction of mandibular position after bilateral sagittal split ramus osteotomy via surgery first approach in patients with mandibular prognathism
(range, 17–31). Polysomnography was performed before treatment. Apnoea–hypopnoea index (AHI), lowest arterial oxygen saturation (LoSpO2 ), cumulative percentage time at SpO2 below 90% during the measurement (CT90), oxygen desaturation index (ODI), longest apnoea time (LAT) and sleep state were measured. Findings: Median and range of measurements was follows: AHI, 0.4/h (0–12.1/h); LoSpO2 , 92% (85–95%); CT90, 0 min (0–0.9 min); ODI, 0.2/h (0–21.6/h); LAT, 0 s (0–25.9 s); rapid eye movement (REM) 20.1% (0–34.1%); NREM, 79.9% (65.9–100%); S1, 6.8% (2.2–22.6%); S2, 60.8% (54.1–70%); S3, 7.9% (0.6–19.3%); S4, 2.4 (0–10.4). One patient was diagnosed with mild OSA. AHI during REM 1.8 (0–21) was higher than AHI during NREM 0.2 (0–9.7). Conclusions: We require attention to OSA in patients with Class III even without the symptoms of OSA and obstruction during REM sleep periods in perioperative orthognathic surgery.
H.K. Oh
http://dx.doi.org/10.1016/j.ijom.2017.02.1107
School of Dentistry, Chonnam National University, South Korea
Duration of orthognathic treatment
Objectives: To predict the mandibular position after bilateral sagittal split ramus osteotomy (BSSRO) via surgery-first approach and following postoperative orthodontic treatment, and to compare it with actual mandibular position in patients with mandibular prognathism. Methods: We evaluated 29 mandibular prognathic patients who underwent BSSRO using lateral cephalograms which were taken in preoperative, immediately after surgery and immediately after debonding. To predict mandibular position at post-treatment stage, we preoperatively measured the increase of vertical dimension on surgical occlusion and calculated mandibular forward movement due to the postoperative clockwise autorotation during postoperative orthodontic treatment. Results: Actual mandibular forward movement (2.1 mm) was significantly greater than preoperatively predicted forward movement (0.9 mm; P 10 mm) or greater vertical dimension increase (>2 mm), even though there was no statistical difference. Conclusions: This study suggested that postoperative mandibular rotational movement and additional relapse should be considered in surgery-first orthognathic surgery.
J. Paunonen ∗ , M. Helminen, T. Peltomäki
compared with preoperative position. Regarding rotational movement, both groups showed inward and inferior rotation 2 weeks after surgery. During retention time both groups rotated to its original condylar axis. However, at 6 months postoperatively, single-jaw group and double-jaw group still showed inward rotation compared with preoperative condylar axis. There is no statistical difference in two groups. Conclusions: This study suggests that, the postoperative condylar positional changes are similar between the single-jaw and doublejaw orthognathic surgery via SFA. http://dx.doi.org/10.1016/j.ijom.2017.02.1105
http://dx.doi.org/10.1016/j.ijom.2017.02.1106 Evaluation of obstructive sleep apnoea and sleep quality in patients with skeletal class III malocclusion K. Ooi ∗ , R. Jokaji, K. Ide, Y. Kobayashi, N. Noguchi, K. Katoh, H. Nakamura, S. Takamichi, M. Nakata, K. Kasahara, S. Kawashiri University of Kanazawa, Kanazawa, Japan Background: Maintenance of airway is most important perioperative management in orthognathic surgery. Obstructive sleep apnoea (OSA) of skeletal class III malocclusion is unknown, however OSA is severe risk of airway obstruction. Objective: The aim of this study was to evaluate OSA and sleep quality in patients with skeletal class III. Methods: Subjects in this study comprised 14 patients with skeletal class III who were treated orthognathic surgery at Kanazawa University Hospital, Kanazawa, Japan. They had no symptoms of OSA. The median age at the time of examination was 23 years
Tampere University Hospital, Tampere, Finland Background: One of the most important factors influencing patient’s post-treatment satisfaction in orthognathic treatment is the accuracy and comprehension of information patient has received. For adult patients it is important to know the total duration of the treatment and particularly how long orthodontic treatment takes. Objectives: The aim was to study the duration of orthognathic treatment conducted with conventional pre- and postsurgical orthodontic treatment phases. Methods: Study material comprised files of 185 patients who had undergone orthognathic treatment at the Oral and Maxillofacial Unit, Tampere University Hospital, Finland between 2007 and 2014. Data was obtained on gender and age, duration of presurgical treatment (until operation), duration of postsurgical treatment (from operation until fixed orthodontic appliances were removed), information about orthodontic tooth extractions and type of surgery. Pretreatment digital cephalograms were used to study severity of malocclusion. Findings: Average presurgical and postsurgical treatment durations were 26 months and 8 months, respectively. If orthodontic treatment included tooth extractions, duration of presurgical treatment was in the average 10 months longer (P < 0.001, linear regression). Age (range 17–70 years) or initial severity of malocclusion did not affect treatment time. Treatment duration was almost the same in each type of surgery (Le Fort I osteotomy 2.6 years, bilateral sagittal split osteotomy 2.8 years and bimaxillary osteotomy 2.8 years). Conclusions: Orthodontic extractions have clinically important impact on the duration of orthognathic treatment. Initial severity of malocclusion, type of surgery, age or gender of patients does not seem to have an impact on treatment time. http://dx.doi.org/10.1016/j.ijom.2017.02.1108