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Schaller B.,University of Bern | Soong P.L.,University of Bern | Soong P.L.,National Dental Center Singapore | Zix J.,University of Bern | And 2 more authors.
British Journal of Oral and Maxillofacial Surgery | Year: 2013

The aim of this study was to evaluate the difference between a 5-day and a 1-day postoperative course of antibiotic on the incidence of infection after mandibular fractures involving the alveolus. Sixty-two patients with fractures of the mandible involving the dentoalveolar region were randomly assigned to 2 groups, both of which were given amoxicillin/clavulanic acid 1.2 g intravenously every 8 h from admission until 24 h postoperatively. The 5-day group were then given amoxicillin/clavulanic acid 625 mg orally every 8 h for another 4 days. The 1-day group was given an oral placebo at the same intervals. Follow-up appointments were 1, 2, 4, 6, 12 weeks and 6 months postoperatively. Development of an infection was the primary end point. Fifty-nine of the 62 patients completed this study. Six of the 30 patients in the 5-day group (20%) and 6 out of the 29 in the 1-day group (21%) developed local wound infections. Three of the 6 in the 1-day group developed purulent discharge and swelling. One patient in the 5-day group developed a rash on the trunk. There were no significant differences in the incidence of infection or side effects between the groups. In fractures of the mandible involving the alveolus, a 1-day postoperative course of antibiotic is as effective in preventing infective complications as a 5-day regimen. © 2013 The British Association of Oral and Maxillofacial Surgeons. Source


Seah T.E.,National Dental Center Singapore
Proceedings of Singapore Healthcare | Year: 2014

Patients with repaired cleft lip and palate often require orthognathic surgery and rhinoplasty to achieve better aesthetics and function. Conventionally, rhinoplasty is performed as a staged procedure after orthognathic surgery. An online search by the author through PubMed and Google Scholar revealed one article describing simultaneous Lefort I osteotomy and rhinoplasty for a bilateral cleft lip and palate patient. This paper reports on a case of simultaneous Lefort I osteotomy, mandibular bilateral saggital split, genioplasty and rhinoplasty for a repaired unilateral cleft lip and palate patient. It also touches on certain operative considerations for the surgeon performing this operation. Source


Chanchareonsook N.,National Dental Center Singapore | Junker R.,Radboud University Nijmegen | Jongpaiboonkit L.,Tissue Regeneration Systems, Inc. | Jansen J.A.,Radboud University Nijmegen
Tissue Engineering - Part B: Reviews | Year: 2014

Background: Despite significant surgical advances over the last decades, segmental mandibular bone repair remains a challenge. In light of this, tissue engineering might offer a next step in the evolution of mandibular reconstruction. Purpose: The purpose of the present report was to (1) systematically review preclinical in vivo as well as clinical literature regarding bone tissue engineering for mandibular continuity defects, and (2) to analyze their effectiveness. Materials and Methods: An electronic search in the databases of the National Library of Medicine and ISI Web of Knowledge was carried out. Only publications in English were considered, and the search was broadened to animals and humans. Furthermore, the reference lists of related review articles and publications selected for inclusion in this review were systematically screened. Results of histology data and amount of bone bridging were chosen as primary outcome variables. However, for human reports, clinical radiographic evidence was accepted for defined primary outcome variable. The biomechanical properties, scaffold degradation, and clinical wound healing were selected as co-outcome variables. Results: The electronic search in the databases of the National Library of Medicine and ISI Web of Knowledge resulted in the identification of 6727 and 5017 titles, respectively. Thereafter, title assessment and hand search resulted in 128 abstracts, 101 full-text articles, and 29 scientific papers reporting on animal experiments as well as 11 papers presenting human data on the subject of tissue-engineered reconstruction of mandibular continuity defects that could be included in the present review. Conclusions: It was concluded that (1) published preclinical in vivo as well as clinical data are limited, and (2) tissue-engineered approaches demonstrate some clinical potential as an alternative to autogenous bone grafting. © Mary Ann Liebert, Inc. Source


Chee H.K.,National Dental Center Singapore
Proceedings of Singapore Healthcare | Year: 2012

Wegener's Granulomatosis is a rare and potentially life-threatening vasculitic disease of unknown origin. The diagnosis of Wegener's Granulomatosis is made on the basis of clinical presentation, positivity for serum c-ANCA and histologic examination of the lesions. This report details a case of limited Wegener's Granulomatosis with hyperplastic gingivitis lesions presenting as an initial manifestation of Wegener's Granulomatosis. The resemblance of the affected gums to over-ripe strawberries is pathognomonic of this condition and is thus highlighted. Because of the rarity of Wegener's Granulomatosis presenting initially in the oral cavity, clinicians should be alerted to the characteristic appearance of "strawberry gingivitis". Source


Tan W.C.,National Dental Center Singapore | Krishnaswamy G.,Quantitative Medicine | Ong M.M.A.,National Dental Center Singapore | Lang N.P.,National Dental Center Singapore | And 3 more authors.
Journal of Clinical Periodontology | Year: 2014

Objectives To compare patient-reported outcome measures (PROMs) after different dental surgical procedures over a 1-week post-surgical period and in relation to duration of the surgery, and periosteal releasing incisions. To evaluate the prevalence of post-surgical complications. Material & Methods Four hundred and sixty-eight healthy dental patients requiring surgeries, such as crown lengthening (CL), open flap debridement (OFD) and implant installation (IMP) in the National Dental Centre, Singapore (2009-2011), were consecutively recruited. PROMs on bleeding, swelling, pain and bruising were obtained using Visual Analogue Scales (VAS) on days 0, 3, 5 and 7 post-operatively. Results On the day of surgery, the IMP procedure gave the lowest median VAS for all four PROM parameters. After a week, OFD still had a significantly higher VAS for swelling, pain and bruising. Patients who underwent procedures lasting more than 60 min. had higher VAS for all parameters except bleeding. After considering other important confounders, type of surgery procedure was no longer associated with the VAS score for any of the parameters. Time after surgery, male gender and shorter surgery duration reduced post-operative VAS for one or more of the parameters. Longer surgeon experience helps reduce VAS scores only for bleeding. Prevalence for tenderness to palpation was 11.6%, 8.9% and 12.2% for IMP, CL and OFD, respectively, 1-week post-operatively. Swelling and suppuration occurred rarely. Conclusions The median VAS scores for all PROM parameters were generally low and reduced to near zero over a week following all three surgical procedures tested. Time after surgery and shorter surgery duration were associated with lower VAS scores in all the PROM parameters in this cohort of patients. Surgery type was not associated significantly with VAS after adjustment with other important confounders. Low prevalences of post-surgical complications were reported. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. Source

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