Background: The demand for beauty is increasing in society as everyone is looking for cosmetic improvement, including gummy smile correction. Object: This study aims to evaluate the efficacy of a combination of a clinical tooth crowns lengthening surgery following by a BTX-A injection in gummy smile treatment upon based on clinical assessment and photography Method: An uncontrolled longitudinal study was implemented at the Faculty of Odonto-Stomatology (FOS) of the University of Medicine and Pharmacy at Ho Chi Minh City (UMPH), Viet Nam, from August 2020 to May 2021. Twenty patients (19 females and one male) at a mean age of 24 years old who came for gummy smile chief complaint were included in the study. Subjects were operated to lengthen the clinical crown following an additional botulinum toxin A injection two months post-surgery. All the participants answered the smile esthetic satisfactory questions and were photographed at the time before treatment (T0), two months after clinical crown lengthening surgery (T1), two weeks (T2), and two months (T3) follow-up visits after BTX-A injection. The gingival exposure (GE) and clinical crown length (CCL) were measured at each time point for analysis.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
20
* Clinical dental crown lengthening surgery protocol: a clinical crown lengthening surgery was performed. * Post-operation protocol Patients were all prescribed antibiotics , anti-inflammation, analgesic, and an antiseptic mouthwash. Patients were instructed for oral hygiene and recalls. * Botulinum Toxin A injection One hundred units (U) of botulinum toxin A (BTX-A) were diluted with 2.5ml of sterile saline solution without shaking. 1 mm syringe with a 30-gauge needle was used to get 0.25ml BTX-A for four-point injection, or 0.6ml in case injection of 6 points. Cold compress was applied extraoral 5 mins at injection site before injection. After local anesthesia, the doctor administered slowly 2,5 U of diluted BTX-A at each point until white cellulite appeared. Patients were recalled two weeks (T2), and two months (T3) after injection.
Faculty of Odontostomatology - University of Medicine and Pharmacy at Ho Chi Minh City
Ho Chi Minh City, Vietnam
Gingival exposure
The outcome is measured in millimeters based on photos of subjects included
Time frame: At the time before treatment (T0)
Gingival exposure
The outcome is measured in millimeters based on photos of subjects included
Time frame: Two months after clinical crown lengthening surgery (T1)
Gingival exposure
The outcome is measured in millimeters based on photos of subjects included
Time frame: Two weeks after Botulinum toxin A injection (T2)
Gingival exposure
The outcome is measured in millimeters based on photos of subjects included
Time frame: Two months after Botulinum toxin A injection (T2)
Clinical crown length
The clinical crown length is measured in millimeters using digital caliper and periodontal probe
Time frame: At the time before treatment (T0)
Clinical crown length
The clinical crown length is measured in millimeters using digital caliper and periodontal probe
Time frame: Two months after clinical crown lengthening surgery (T1)
Clinical crown length
The clinical crown length is measured in millimeters using digital caliper and periodontal probe
Time frame: Two weeks after Botulinum toxin A injection (T2)
Clinical crown length
The clinical crown length is measured in millimeters using digital caliper and periodontal probe
Time frame: Two months after Botulinum toxin A injection (T2)
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