Unveiling the Effects of Orthognathic Surgery & Twin Block Appliance on Pharyngeal Airways, Hyoid Bone & Tongue Position.
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2017, Vol 16, Issue 10
Abstract
Objective: The purpose of the Study was to determine and compare changes after orthognathic surgery & Twin Block Appliance in upper and lower pharyngeal airways (ULPA), Hyoid Bone & Tongue Position. Methods : 50 Lateral Cephalograms were evaluated for 11 Parameters (8 for ULPA dimensions , 2 for Hyoid Bone Position & 1 for Tongue Position) - the sample was subdivided into 5 Groups of 10 Lateral Cephalograms each – Group I being Lateral Cephalograms of subjects with Skeletal Class I relation as Control Group , Group II consisted of Lateral Cephalograms of patients before Orthognathic Surgery , Group III consisted of Lateral Cephalograms of patients after Orthognathic Surgery, Group IV consisted of Lateral Cephalograms of patients before Twin Block Appliance therapy & Group V consisted of Lateral Cephalograms of patients After Twin Block Appliance therapy . Independent samples t – test was used for statistical analysis, and a P – value < .05 was considered statistically significant. Results: There was increase in Nasopharynx (U2, P < 0.047) & hypopharynx (L1, P < 0.044) airway dimension , hyoid bone was placed posteriorly (H1 , P <.032) in Group V compared to Group IV . There was increase in Nasopharynx dimension (U2, P < 0.42) , Hyoid Bone was placed superiorly (H2 , P < 0.02) in Group V compared to Group I. There was increase in Nasopharynx (U1 - P < 0.002 , U2 - P < 0.001) & Hypopharynx dimension (L1 , P < 0.007) in Group III compared to Group I. . There was increase in Nasopharynx (U1 - P < 0.001 , U2 - P < 0.004) & Hypopharynx dimension (L1 , P < 0.015) & Hyoid bone was placed inferiorly in Group III compared to Group V. In group III , Patients who underwent Mandibular Advancement Surgery , Hyoid Bone was placed Superiorly (H2 , P < 0.023) when compared to patients who underwent Mandibular Setback Surgery. Tongue position changes were not statistically significant when compared between different groups. Conclusion: Orthognathic Surgery (both Mandibular Advancement & Reduction) & Twin Block appliance bring about significant changes in ULPA dimensions & Hyoid Bone position.
Authors and Affiliations
Dr. Vadhvani Atit kumar Choithram
Keywords
Related Articles
- EP ID EP243537
- DOI 10.9790/0853-1610040816
- Views 34
- Downloads 0
Prevalence of Diabetes Mellitus And Risk Factors Among The Employees of N.P.D.C.L.Warangal
Introduction: Diabetes mellitus, a lifelong disease is achieving pandemic proportions. Even in India its prevalence is on the rise making our country the diabetic capital or the world. Many studies have found that sedent...
“Observations of Serum Magnesium Levels in Major Burns”
To observe the Serum magnesium levels in 25 cases of major burns. 25 cases of Major burn of varying degree from different ages & sex admitted in Burn ward of Rajendra Institute of Medical Sciences, Ranchi were taken up f...
Restoring Esthetic and Functional Harmony in A Severely Worn Out Dentition with Full Mouth Rehabilitation.
Tooth wear is attributed to several factors many of which often remain unidentified. Most of the problems arise from age related occlusal wear, loss of posterior support due to loss of teeth, periodontal and endodontic i...
Increased TG/HDL Ratio, A Surrogate Marker of Insulin Resistance In PCOS Women
Background: Insulin resistance (IR) is an important clinical and biochemical determinant, not only for diabetes but also of many other clinical states including polycystic ovarian syndrome. TG/HDL ratio has been a simple...
Roleof diffusion weighted MRI in differentiating benign versus malignant female pelvic masses and its pathological correlation
Uterine and adnexal masses have been a leading cause of morbidity and mortality in women worldwide.The role of MRI in gynaecological conditions has evolved during the past two decades, determining whether a clinically di...