The effect of hard tissue surgical changes on soft tissue displacement: a pilot CBCT study

Koerich, Leonardo B.; Brunetto, Daniel Paludo; Ohira, Eduardo Terumi Blatt

doi:10.1590/2177-6709.22.5.039-046.oar

Cited by 5 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A previous study indicated that CBCT overcomes the limitations of 2D radiographs without exposing the patient to high levels of radiation, and allows the simultaneous evaluation of hard and soft tissues [28]. In recent years, the evaluation of soft tissue displacement using CBCT has become more common [17,18,[29][30][31][32][33][34][35].…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional evaluation of mid-facial soft tissue changes after expansion using micro-implant-supported maxillary skeletal expander

Nguyen

Shin

Giap

et al. 2020

Preprint

View full text Add to dashboard Cite

Background The aim of this study was to assess the mid-facial soft tissue changes induced by a micro-implant-supported maxillary skeletal expander in late adolescents and young adults by cone-beam computerized tomography and the correlations between hard and soft tissue changes after expansion with maxillary skeletal expander.Subjects and methods Twenty patients with maxillary transverse deficiency treated with maxillary skeletal expander were selected. Cone-beam computerized tomography images taken before and after expansion were superimposed to measure the changes in soft and hard tissue landmarks.Results Anterior nasal spine, posterior nasal spine, and alveolar bone width were significantly increased after expansion with maxillary skeletal expander (p < 0.05). The average lateral movement of the cheek points was 1.13 ± 0.33 mm (left) and 1.41 ± 0.39 mm (right), while that of the alar curvature points was 1.07 ± 0.72 mm (left) and 1.06 ± 0.68 (right) (p < 0.05). The average forward displacement of the cheek points was 0.42 ± 0.66 mm (left) and 0.60 ± 0.58 mm (right), whereas that of the alar curvature points was 0.80 ± 0.67 mm (left) and 0.68 ± 0.56 mm (right) side (p < 0.05). The average downward movement of the subnasale was 0.40 ± 0.37 mm (p < 0.05). The changes in cheek points and alar curvature points on both sides significantly correlated with hard-tissue changes (p < 0.05).Conclusions Maxillary expansion using maxillary skeletal expander resulted in significant lateral and forward movement of soft tissues of the cheek and alar curvature points on both sides and correlated with the maxillary suture opening at the anterior and posterior nasal spines.

show abstract

Section: Discussionmentioning

confidence: 99%

Three-dimensional evaluation of mid-facial soft tissue changes after expansion using micro-implant-supported maxillary skeletal expander

Nguyen

Shin

Giap

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…We found facial soft tissue changes in both the upper face and lower face regions with a mean of 0.77 ± 0.51 and 0.67 ± 0.38 mm respectively, while the mean deviation at the nasal region was 1.03 ± 0.14 mm. Previous studies of maxillary advancement and mandibular setback reported more soft-tissue movement in the central parts than in the lateral parts [25]. While Gjorup et al found that no changes occurred in the cheeks, they took into consideration that the influence of the muscles and soft tissue tension decreased as the distance from the area where the hard tissue changes increased [20].…”

Section: Soft Tissue Changesmentioning

confidence: 98%

Az arc lágyrészeinek háromdimenziós változásai skeletalis III. osztályú páciensek bimaxilláris műtétje után: prospektív vizsgálat

2021

View full text Add to dashboard Cite

Az ortognath műtétek tervezésénél a lágyrészek adaptációjának és kontúrjainak figyelembe vétele kiemelt fontosságú.Prospektív tanulmányunk célja a skeletalis III. osztályú páciensek bimaxilláris műtétje után, az arc különböző morfológiairégióiban bekövetkezett lágyrész-változások átfogó értékelésének elvégzése kézi háromdimenziós strukturált fényszkennerrel.Vizsgálati mintánk 12 olyan páciensből állt (6 férfi és 6 nő, átlagéletkoruk 22 ± 2,17 év), akiknek a skeletalisIII. osztályú eltérése átfogó kezelésük második lépéseként bimaxilláris osteotomiát igényelt. Háromdimenziós arcképeketkészítettünk egy héttel a műtét előtt (T0) és 6 hónappal a műtét után (T1) kézi 3D strukturált fényszkennerrel. A képekenlineáris és szögméréseket végeztünk és hasonlítottunk össze, illetve elkészítettük az arc 7 morfológiai régiójánakháromdimenziós deviációs elemzését. Statisztikailag szignifikáns növekedést találtunk az orr- és az orralap szélességében,az orrcsúcs szögében, a felső ajak magasságában és az alsó ajak szögében. Ezzel szemben az alsó ajak magasságaés az inter-labialis szög értéke szignifikánsan csökkent. A skleletalis III. osztályú betegek bimaxilláris műtétjeután különböző mértékű háromdimenziós lágyrész változásokat figyeltünk meg a faciális régiók többségében, melyekközül jelentősebbek voltak a középarc, az orr és a felső ajak változásai. Ezekkel a várható változásokkal a kezelésekmegtervezésénél számolni kell.

show abstract

“…The sample size was determined based on the findings of a previous study by Koerich and colleagues (109). The extent of skeletal movement achieved using the treatment plan was (3.87±1.6mm) for the maxillary advancement, and (3.46±1.34mm) for the mandibular setback.…”

Section: Subjectsmentioning

confidence: 99%

The application of the diagnostic 3-D imaging procedures in maxillofacial orthopedics

Alkhayer¹

View full text Add to dashboard Cite

CBCT/ CT Cone beam/ computed tomography CFAs Craniofacial anomalies OMSs Oral and maxillofacial surgeons AAOMS Association of oral and maxillofacial surgeons MCA Multiple congenital abnormalities CL/P Cleft lip and palate CO Central occlusion CR Central relation RME Rapid maxillary expansion 2D Two-dimensional 3D Three-dimensional 4D Four-dimensional MRI Magnetic resonance imaging TMJ Temporomandibular joint CMM Coordinate measurement machines LED Light emitting diode STL Stereolithography ICC Interclass correlation coefficient ADRL Average distances between the reciprocal landmarks BSSRO Bilateral sagittal split ramus osteotomy MSS Mandibular setback surgery Skeletal and dental consideration in the transverse dimensionMaxillary transverse deficiency may be one of the most pervasive skeletal problems in the craniofacial region (7). The transverse dimension is often interrelated with the sagittal and vertical dimensions. However, the transverse dimension relates primarily to the posterior occlusion, and any discrepancy is usually manifest as a unilateral or bilateral crossbite of the buccal occlusion. Conservative correction of the maxillary transverse deficiency 1.3.2.1 Unilateral posterior crossbite in cleft lip and palateMaxillary skeletal asymmetry in unilateral complete clefts of the lip and palate may also be reflected in a unilateral posterior crossbite, which may be expanded with a quad helix type of appliance or rapid maxillary expansion (RME) in the mixed dentition. The cleft maxilla does not have a midpalatal suture, instead, there is a midpalatal cleft covered with repaired and scarred palatal tissues limiting the rate and amount of expansion. The force provided by these appliances allows the soft tissue of the palate to stretch and adapt to the increasing maxillary width. This type premolars. This may be accomplished with a hyrax type appliance screw (Figure 3, A). The patient Surgical correction of the craniofacial deformities:According to the American Association of Oral and Maxillofacial Surgeons (AAOMS), orthognathic surgery is the surgical correction of abnormalities of the mandible, maxilla, or both.The underlying abnormality may be present at birth or may become evident as the patient grows IndicationsGiven the relationship between facial skeletal deformities and masticatory dysfunction as well as the limitations of non-surgical therapies to correct these discrepancies. The measurement of these discrepancies must consider dental compensations relating to the malocclusion and the underlying skeletal deformity. Orthognathic surgery should be considered medically appropriate in the following circumstances (11):A. Anteroposterior discrepancies: established norm=2mm 1. Maxillary/mandibular incisor relationship  Horizontal overjet of +5mm or more  Horizontal overjet of zero to a negative value 2. Maxillary/mandibular anteroposterior molar relationship discrepancy of 4mm or more (norm 0 to 1mm) 3. These values represent two or more standard deviation from published norms 1.6.2.2 Intraoral Scanning W...

show abstract

The effect of hard tissue surgical changes on soft tissue displacement: a pilot CBCT study

Cited by 5 publications

References 27 publications

Three-dimensional evaluation of mid-facial soft tissue changes after expansion using micro-implant-supported maxillary skeletal expander

Three-dimensional evaluation of mid-facial soft tissue changes after expansion using micro-implant-supported maxillary skeletal expander

Az arc lágyrészeinek háromdimenziós változásai skeletalis III. osztályú páciensek bimaxilláris műtétje után: prospektív vizsgálat

The application of the diagnostic 3-D imaging procedures in maxillofacial orthopedics

Contact Info

Product

Resources

About