Impact of the Distance of Maxillary Advancement on Horizontal Relapse After Orthognathic Surgery

Abstract

Our data suggest positive correlation between amount of maxillary advancement and horizontal relapse as well as a positive correlation between history of cleft and horizontal relapse. Bone grafting of the maxillary osteotomy sites has a protective effect on the relapse.

Relapse rate after surgical treatment of maxillary hypoplasia in non-growing cleft patients: a systematic review and meta-analysis

“…This rate was much higher than the rates for LFI with rigid fixation with interpositional bone grafting. The results of this review are in agreement with the conclusions drawn by Fahradyan et al through a multiple linear regression analysis, who reported that bone grafting at maxillary osteotomy sites has a positive effect on relapse 36 .…”

“…The characteristics of the selected studies are presented in Table 1. Collectively, these 24 studies included 570 eligible patients: group A (15 studies, 405 eligible patients 4,14,15,18,21,[36][37][38][39][40][41][42][43][44][45] ); group B (10 studies, 126 eligible patients 14,18,21,26,35,[46][47][48][49][50] ); and group C (two studies, 39 eligible patients 30,33 ). Three of the studies were included in both group A and group B 14,18,21 .…”

“…Relationship between horizontal maxillary advancement and the relapse rate in LFI with rigid fixation It is still difficult to elucidate the correlation between maxillary advancement and the relapse rate. In selected studies, Hirano and Suzuki 43 , Heliövaara et al 44 , Thongdee and Samman 41 , Chua et al 18 , and Fahradyan et al 36 reported a positive correlation between maxillary advancement and the relapse rate. Posnick and Taylor 45 and Cheung et al 4 reported no definite correlation, and the rest of the studies did not mention any correlation at all.…”

“…Most authors are of the opinion that interpositional bone grafting has a positive effect on relapse 4,18,36,[38][39][40][42][43][44][45] . In the study conducted by Cheung et al, the mean horizontal maxillary relapse rate was 66% for LFI with rigid fixation without interpositional bone grafting 15 .…”

Orthognathic Surgery in Cleft Lip and Palate Patients

“…After orthognathic surgery, cleft patients have a higher than normal risk of relapse due to factors such as different soft tissue-bone relations and complex mobilization vectors. Fahradyan et al [59] reported that, in comparison to class III malocclusion patients without clefts, more relapse was encountered in those with Orthognathic Surgery in Cleft Lip and Palate Patients DOI: http://dx.doi.org/10.5772/intechopen.89556 clefts (1.25 mm or more on average), and there was a significant positive correlation between larger clefts and horizontal relapse. In their study, the mean relapse rate was similar among different types of clefts, and in the case of each 1 mm increase in maxillary advancement, horizontal relapse increased by 0.3 mm on average [59].…”