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Applied mechanics study of a modified sagital split osteotomy
1094
Poster
follicular cyst of the mandibular ramus for which only a 1.5 cm mucosal incision was made. Superficial bone was removed with calibrated drill without mandibular nerve injury. The guidance provides surgeons with safety and reliability.
infection (8), screw loosening (6) plate exposed or palpable (8) or sensitivity to cold (11). Eighteen (6.1%) asymptomatic plates were removed from the contralateral side. Removal of asymptomatic miniplates has adverse economic effects.
doi:10.1016/j.ijom.2007.09.052
doi:10.1016/j.ijom.2007.09.054
Orthognathic Surgery P52 Applied mechanics study of a modified sagital split osteotomy E. Puricelli*, M. F. de Paris, D. Ponzoni, J. J. da Cunha Filho, C. F. R. Cardoso, G. L. Martins Department of Surgery and Orthopaedics School of Dentistry, Federal University of Rio Grande do Sul Porto Alegre, RS, Brazil Puricelli suggested a modification on SSO. The design stability was studied by finite elements. Three groups of resin mandible prototypes were compared by CT scans: without osteotomy (control), Obwegeser Dal Pont SSO (test I) and Puricelli’s SSO (test II). A software compared magnitude of displacement and Von Mises tension distribution. In Test I, maximum stress was seen in the plate region with value greater than those of Test II and Control groups. In Test II, maximum stress was in the same region as in Control group but was lower. The results suggest better stability for modified SSO. doi:10.1016/j.ijom.2007.09.053
P53 Reasons for mini-plate removal following bilateral sagittal split osteotomy M. Kuhlefelt*, H.A. Thoren, C. Lindqvist, P.O. Laine Department for Oral and Maxillofacial Surg., HUS, PO Box 263, Kasarmink. 11-13, 00290 HUS, Helsinki, Finland Osteosynthesis using mini-plates is common practise in maxillofacial surgery. In some situations the plates have to be removed. Our aim was to identify the reasons for mini-plate removal after bilateral sagittal split osteotomy operations. 147 patients (86 women, 61 men, mean age 35.3 years) were operated on during 1997–2003. The mean follow-up time was 2 years. 294 mini-plates were inserted and 55 (18.7%) were removed because of
P54 Lefort II osteotomy for nasomaxillary hypoplasia P. Hegde*, K. M. Cariappa MCODS, Manipal, 2A,50/51,9 Main,14 Cross, BTM 2nd Stage, Bangalore, India Nasomaxillary Hypoplasia clinically presents itself as a deformity with hypoplasia or retrusion of the nasal bones and the maxilla. This is manifested as a deficient projection of the nose. Henderson and Jackson presented a landmark paper regarding Lefort 2 osteotomy for the treatment of this condition. We present a case of a 20-yearold girl with nasomaxillary hypoplasia treated with Lefort 2 procedure in our unit. doi:10.1016/j.ijom.2007.09.055
Others P55 Ludwig’s angina with mediastinitis – a case report A. Premanand Desai*, S. Karkun, S. K. Roy Chowdhury Oral & Maxillofacial Surgery Army Dental Centre (R & R) Delhi Cantt 110010, India Background: Deep neck infections are a rare but potentially fatal complication that can progress rapidly from a toothache to a life-threatening infection. Methods: This poster reviews a case of a 41-year-old serving soldier seemingly innocuous toothache which rapidly progressed to Ludwig’s angina and mediastinitis. Results: Uneventful recovery. Conclusion: While a life-threatening deep neck infection is an uncommon complication of tooth abscess. The surgeon should be able to recognize the signs and symptoms. The basics of infection management include prompt airway management, evaluation by CECT for major infections, incision and drainage of abscessed cavities and early and appropriate antimicrobial therapy guided by c & s results. doi:10.1016/j.ijom.2007.09.056
P56 Maxillary sinus – a room with a view! A. Kataria*, D. Das, N. Iyer, J. Nagaraj M M College of Dental Sciences & Research, M M University, Mullana, Ambala District, Haryana, India The importance of a detailed knowledge of anatomy & physiology of the maxillary sinus cannot be overstressed for a maxillo-facial surgeon. Contemporary studies describe it from a holistic bird’s-eye-view as a cavity contained in maxillary bone with an opening into the lateral nasal wall. With sinus surgery rapidly shifting from open (external) to a largely key- hole (endoscopic) approach, this poster demonstrates the need and fulfillment of describing its anatomy from the view point of a sinus inhabitant. doi:10.1016/j.ijom.2007.09.057
P57 Carbon dioxide lasers in maxillofacial surgery – our experience A. Asha*, S. Girish Rao Department of Oral and Maxillofacial Surgery, R.V. Dental College and Hospital, Bangalore, India Lasers have revolutionized every surgical specialty; none more so than the maxillofacial region. The use of lasers in maxillofacial surgery ranges from cosmetic resurfacing and hair removal to ablative oncosurgery. The carbon dioxide (CO2) laser is an excellent tool in the armamentarium of the maxillofacial surgeon. It can be used for resurfacing, coagulation of small vessels, pre-prosthetic surgery, excision of pathology, implant uncovering among other procedures with minimal morbidity and complications and a significant reduction in post-operative pain and inflammation. The paper presented is a collage of procedures routinely undertaken with CO2 laser with a discussion of actual and potential complications. doi:10.1016/j.ijom.2007.09.058
P58 MYIASIS N. Deenadayalan*, B. Saravana Kumar Adhiparasakthi Dental College & Hospital, Melmaruvathur 603319, India A mentally retarded patient from a low socio-economic status reported with
Poster
follicular cyst of the mandibular ramus for which only a 1.5 cm mucosal incision was made. Superficial bone was removed with calibrated drill without mandibular nerve injury. The guidance provides surgeons with safety and reliability.
infection (8), screw loosening (6) plate exposed or palpable (8) or sensitivity to cold (11). Eighteen (6.1%) asymptomatic plates were removed from the contralateral side. Removal of asymptomatic miniplates has adverse economic effects.
doi:10.1016/j.ijom.2007.09.052
doi:10.1016/j.ijom.2007.09.054
Orthognathic Surgery P52 Applied mechanics study of a modified sagital split osteotomy E. Puricelli*, M. F. de Paris, D. Ponzoni, J. J. da Cunha Filho, C. F. R. Cardoso, G. L. Martins Department of Surgery and Orthopaedics School of Dentistry, Federal University of Rio Grande do Sul Porto Alegre, RS, Brazil Puricelli suggested a modification on SSO. The design stability was studied by finite elements. Three groups of resin mandible prototypes were compared by CT scans: without osteotomy (control), Obwegeser Dal Pont SSO (test I) and Puricelli’s SSO (test II). A software compared magnitude of displacement and Von Mises tension distribution. In Test I, maximum stress was seen in the plate region with value greater than those of Test II and Control groups. In Test II, maximum stress was in the same region as in Control group but was lower. The results suggest better stability for modified SSO. doi:10.1016/j.ijom.2007.09.053
P53 Reasons for mini-plate removal following bilateral sagittal split osteotomy M. Kuhlefelt*, H.A. Thoren, C. Lindqvist, P.O. Laine Department for Oral and Maxillofacial Surg., HUS, PO Box 263, Kasarmink. 11-13, 00290 HUS, Helsinki, Finland Osteosynthesis using mini-plates is common practise in maxillofacial surgery. In some situations the plates have to be removed. Our aim was to identify the reasons for mini-plate removal after bilateral sagittal split osteotomy operations. 147 patients (86 women, 61 men, mean age 35.3 years) were operated on during 1997–2003. The mean follow-up time was 2 years. 294 mini-plates were inserted and 55 (18.7%) were removed because of
P54 Lefort II osteotomy for nasomaxillary hypoplasia P. Hegde*, K. M. Cariappa MCODS, Manipal, 2A,50/51,9 Main,14 Cross, BTM 2nd Stage, Bangalore, India Nasomaxillary Hypoplasia clinically presents itself as a deformity with hypoplasia or retrusion of the nasal bones and the maxilla. This is manifested as a deficient projection of the nose. Henderson and Jackson presented a landmark paper regarding Lefort 2 osteotomy for the treatment of this condition. We present a case of a 20-yearold girl with nasomaxillary hypoplasia treated with Lefort 2 procedure in our unit. doi:10.1016/j.ijom.2007.09.055
Others P55 Ludwig’s angina with mediastinitis – a case report A. Premanand Desai*, S. Karkun, S. K. Roy Chowdhury Oral & Maxillofacial Surgery Army Dental Centre (R & R) Delhi Cantt 110010, India Background: Deep neck infections are a rare but potentially fatal complication that can progress rapidly from a toothache to a life-threatening infection. Methods: This poster reviews a case of a 41-year-old serving soldier seemingly innocuous toothache which rapidly progressed to Ludwig’s angina and mediastinitis. Results: Uneventful recovery. Conclusion: While a life-threatening deep neck infection is an uncommon complication of tooth abscess. The surgeon should be able to recognize the signs and symptoms. The basics of infection management include prompt airway management, evaluation by CECT for major infections, incision and drainage of abscessed cavities and early and appropriate antimicrobial therapy guided by c & s results. doi:10.1016/j.ijom.2007.09.056
P56 Maxillary sinus – a room with a view! A. Kataria*, D. Das, N. Iyer, J. Nagaraj M M College of Dental Sciences & Research, M M University, Mullana, Ambala District, Haryana, India The importance of a detailed knowledge of anatomy & physiology of the maxillary sinus cannot be overstressed for a maxillo-facial surgeon. Contemporary studies describe it from a holistic bird’s-eye-view as a cavity contained in maxillary bone with an opening into the lateral nasal wall. With sinus surgery rapidly shifting from open (external) to a largely key- hole (endoscopic) approach, this poster demonstrates the need and fulfillment of describing its anatomy from the view point of a sinus inhabitant. doi:10.1016/j.ijom.2007.09.057
P57 Carbon dioxide lasers in maxillofacial surgery – our experience A. Asha*, S. Girish Rao Department of Oral and Maxillofacial Surgery, R.V. Dental College and Hospital, Bangalore, India Lasers have revolutionized every surgical specialty; none more so than the maxillofacial region. The use of lasers in maxillofacial surgery ranges from cosmetic resurfacing and hair removal to ablative oncosurgery. The carbon dioxide (CO2) laser is an excellent tool in the armamentarium of the maxillofacial surgeon. It can be used for resurfacing, coagulation of small vessels, pre-prosthetic surgery, excision of pathology, implant uncovering among other procedures with minimal morbidity and complications and a significant reduction in post-operative pain and inflammation. The paper presented is a collage of procedures routinely undertaken with CO2 laser with a discussion of actual and potential complications. doi:10.1016/j.ijom.2007.09.058
P58 MYIASIS N. Deenadayalan*, B. Saravana Kumar Adhiparasakthi Dental College & Hospital, Melmaruvathur 603319, India A mentally retarded patient from a low socio-economic status reported with