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Effect of St. John's Wort and Olive Oils on the Postoperative Complications

Effect of St. John's Wort Oil and Olive Oil on the Postoperative Complications After Impacted Third Molar Surgery: Randomized, Double-blind Clinical Trial

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04373421
Enrollment
90
Registered
2020-05-04
Start date
2018-08-15
Completion date
2020-06-01
Last updated
2021-11-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Impacted Third Molar Tooth

Brief summary

Surgical removal of impacted third molars is one of the most frequent procedures carried out in the oral and maxillofacial surgery clinics. There are a varying range of postoperative complications including pain, edema and swelling. Antibiotics, analgesics and mouthwashes are usually prescribed for the treatment of these complications. Patients undergoing impacted third molar surgery are frequently prescribed chlorhexidine mouthwashes with/without benzydamine hydrochloride. However, to preclude the adverse effects of these chemical agents, there has been a search for plant-derived alternatives with anti-inflammatory, antibacterial and analgesic properties as part of the oral care routine following surgical removal of impacted third molars. However, there is no study investigating the comparison of different essential oils in the literature. Thus, this multicenter study was aimed to evaluate the effects of St. John's wort oil and virgin olive oil on the postoperative complications and compared with chlorhexidine gluconate plus benzydamine hydrochloride mouthwash after the removal of impacted wisdom teeth.This study was aimed to evaluate the effects of St. John's wort oil, virgin olive oil, and chlorhexidine gluconate plus benzydamine hydrochloride on the postoperative complications after the removal of impacted wisdom teeth.

Interventions

DRUGChlorhexidine Gluconate 0.12 % Mouthwash + benzydamine hydrochloride

After anesthesia, the horizontal incision was made with no. 15 scalpel blade and a full thickness mucoperiosteal flap was raised. In all surgical procedures, bone removal and/or tooth sectioning were performed under abundant irrigation. Following the extraction, granulation tissues were removed, and post extraction cavity was irrigated with sterile 0.9% saline solution. After the bleeding was controlled, the mucoperiosteal flap was repositioned by 3.0 silk sutures. The patients were postoperatively prescribed paracetamol (Parol® 500 mg, Atabay Chemical Industry, Istanbul, Turkey) to use when required with a maximum of 4 doses per day. Patients were instructed to maintain a soft diet, and refrain from mouth washing, brushing and flossing during the first 24 hour. They were also instructed to rinse their mouth with 15 ml of mouthwash for 30 seconds, 3 times a day, and continue until the 7th postoperative day.

After anesthesia, the horizontal incision was made with no. 15 scalpel blade and a full thickness mucoperiosteal flap was raised. In all surgical procedures, bone removal and/or tooth sectioning were performed under abundant irrigation. Following the extraction, granulation tissues were removed, and post extraction cavity was irrigated with sterile 0.9% saline solution. After the bleeding was controlled, the mucoperiosteal flap was repositioned by 3.0 silk sutures. The patients were postoperatively prescribed paracetamol (Parol® 500 mg, Atabay Chemical Industry, Istanbul, Turkey) to use when required with a maximum of 4 doses per day. Patients were instructed to maintain a soft diet, and refrain from mouth washing, brushing and flossing during the first 24 hour. They were also instructed to rinse their mouth with 15 ml of mouthwash for 30 seconds, 3 times a day, and continue until the 7th postoperative day.

PROCEDUREVirgin olive oil

After anesthesia, the horizontal incision was made with no. 15 scalpel blade and a full thickness mucoperiosteal flap was raised. In all surgical procedures, bone removal and/or tooth sectioning were performed under abundant irrigation. Following the extraction, granulation tissues were removed, and post extraction cavity was irrigated with sterile 0.9% saline solution. After the bleeding was controlled, the mucoperiosteal flap was repositioned by 3.0 silk sutures. The patients were postoperatively prescribed paracetamol (Parol® 500 mg, Atabay Chemical Industry, Istanbul, Turkey) to use when required with a maximum of 4 doses per day. Patients were instructed to maintain a soft diet, and refrain from mouth washing, brushing and flossing during the first 24 hour. They were also instructed to rinse their mouth with 15 ml of mouthwash for 30 seconds, 3 times a day, and continue until the 7th postoperative day.

Sponsors

Yuzuncu Yil University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Caregiver, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 40 Years
Healthy volunteers
No

Inclusion criteria

* be 18-40 years old * has unilateral mandibular impacted third molars with similar angulation position according to Winter's classification (mesio-angular) and similar impaction degree according to Pell & Gregory's classification (class II, Level B). * absence of any systemic disease * absence of pregnancy/lactating state,

Exclusion criteria

* Patients with smoking habits, drug abuse, history of pericoronitis associated with the lower third molar * not regularly coming to the controls

Design outcomes

Primary

MeasureTime frameDescription
Postoperative PainPostoperatif 1st dayTo record the level of pain, patients were instructed to rate it on a 100-mm visual analog scale (VAS) was used wherein 0 indicated no pain and 100 indicated the worst pain imaginable.
Postoperative Jaw FunctionPostoperatif 1st dayFor the assessment of difficulty during jaw function, patients were asked to rate it on a 100-mm VAS, wherein 0 indicated no limitation and 100 indicated severe limitation.
Postoperative SwellingPostoperative 1st dayFacial swelling was assessed using a thread and millimeter ruler and averaged the following five measurements: Distance I (from the angle of the mandible to labial commissure); Distance II (from the angle of the mandible to the nasal border); Distance III (from the angle of the mandible to the external corner of the eye); Distance IV (from the angle of the mandible to tragus) and Distance V (from the angle of the mandible to soft pogonion). For evaluation of changes in the abovementioned distances during the postoperative period, the percentage of facial swelling was calculated by subtracting the preoperative measurements from the postoperative measurements then divided by the preoperative measurements and multiplied by 100.
Postoperative TrismusPostoperative 1st dayFor evaluation of trismus, the percentage of difference in maximum mouth opening during the postoperative period (B) was calculated by subtracting the preoperative measurement (A) from the postoperative measurement then dividing by the preoperative measurement (A) and multiplying by 100 (percentage of difference = \[B - A\]/B × 100).

Countries

Turkey (Türkiye)

Participant flow

Participants by arm

ArmCount
Chlorhexidine Gluconate Plus Benzydamine Hydrochloride
Chlorhexidine is one of the most commonly used medications after tooth extraction. It exhibits a wide spectrum of antiseptic, bactericidal and bacteriostatic effects. The most common side effect of chlorhexidine is oral discoloration, taste changes and allergic responses. Furthermore, it has been reported that chlorhexidine has cytotoxic effect on gingival fibroblasts, epithelial cells, neutrophils and red blood cells; also shows incremental trend in genotoxicity as the duration of usage is increased. Benzydamine hydrochloride is a nonsteroidal anti-inflammatory drug that elicits anti-inflammatory, analgesic, anesthetic and antimicrobial effects. It is often used in addition to the topical application of chlorhexidine.. However, side effects such as urticaria, erythema, pruritus, photosensitivity, bronchospasm and renal problems can be observed associated with the use of benzydamine.
26
St. John's Wort Oil
St. John's Wort (Hypericum perforatum) is a European medicinal plant with a history of more than 2000 years which possessing a variety of important constituents including phloroglucinols (hyperforin and adhyperforin), naphthodianthrones (hypericin and pseudohypericin), xanthones, essential oil, biflavones (biapigenin and amentoflavone), flavonol derivatives and phenolic compounds. The important components of St. John's Wort such as hypericin and hyperforin exert anti-inflammatory, antimicrobial, anticancer effects as well as stimulating tissue growth and differentiation. Hypericin exhibits anti-inflammatory effects by inhibiting the production of interleukin-12; whereas hyperforin reveals this effect by inhibiting the mechanisms of cyclooxygenase 1, 5-lipoxygenase and prostaglandin E2. St. John's Wort oil is extracted by maceration of the hypericum herb in carrier oil, such as virgin olive oil.
26
Virgin Olive Oil
The olive oil, a product extracted from the fruit of Olea europaea, exerts also antioxidant and anti-inflammatory effects due to its important contents including oleic acids, phenolic acids, secoiridoids and flavonoids. The oral application of olive oil has been shown to have protective anti-inflammatory effects and accelerated epithelial healing.
29
Total81

Baseline characteristics

CharacteristicChlorhexidine Gluconate Plus Benzydamine HydrochlorideSt. John's Wort OilVirgin Olive OilTotal
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
Between 18 and 65 years
26 Participants26 Participants29 Participants81 Participants
Race and Ethnicity Not Collected0 Participants
Sex: Female, Male
Female
19 Participants21 Participants23 Participants63 Participants
Sex: Female, Male
Male
7 Participants5 Participants6 Participants18 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 260 / 260 / 29
other
Total, other adverse events
0 / 260 / 260 / 29
serious
Total, serious adverse events
0 / 260 / 260 / 29

Outcome results

Primary

Postoperative Jaw Function

For the assessment of difficulty during jaw function, patients were asked to rate it on a 100-mm VAS, wherein 0 indicated no limitation and 100 indicated severe limitation.

Time frame: Postoperatif 3rd day

Population: The inclusion criteria were being 18-40 years old, have asymptomatic unilateral mandibular impacted third molars with similar angulation positions according to Winter's classification (mesioangular), and having similar impaction degree according to Pell and Gregory's classification (class II, level B).

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Jaw Function47.8 score on a scaleStandard Deviation 28.1
St. John's Wort OilPostoperative Jaw Function42.5 score on a scaleStandard Deviation 24.5
Virgin Olive OilPostoperative Jaw Function47.2 score on a scaleStandard Deviation 20.5
Primary

Postoperative Jaw Function

For the assessment of difficulty during jaw function, patients were asked to rate it on a 100-mm VAS, wherein 0 indicated no limitation and 100 indicated severe limitation.

Time frame: Postoperatif 5th day

Population: The inclusion criteria were being 18-40 years old, have asymptomatic unilateral mandibular impacted third molars with similar angulation positions according to Winter's classification (mesioangular), and having similar impaction degree according to Pell and Gregory's classification (class II, level B).

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Jaw Function29.5 score on a scaleStandard Deviation 19.8
St. John's Wort OilPostoperative Jaw Function26.1 score on a scaleStandard Deviation 20.1
Virgin Olive OilPostoperative Jaw Function28.6 score on a scaleStandard Deviation 21.7
Primary

Postoperative Jaw Function

For the assessment of difficulty during jaw function, patients were asked to rate it on a 100-mm VAS, wherein 0 indicated no limitation and 100 indicated severe limitation.

Time frame: Postoperatif 4th day

Population: The inclusion criteria were being 18-40 years old, have asymptomatic unilateral mandibular impacted third molars with similar angulation positions according to Winter's classification (mesioangular), and having similar impaction degree according to Pell and Gregory's classification (class II, level B).

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Jaw Function44.4 score on a scaleStandard Deviation 25.3
St. John's Wort OilPostoperative Jaw Function36.6 score on a scaleStandard Deviation 22.5
Virgin Olive OilPostoperative Jaw Function35.1 score on a scaleStandard Deviation 20.4
Primary

Postoperative Jaw Function

For the assessment of difficulty during jaw function, patients were asked to rate it on a 100-mm VAS, wherein 0 indicated no limitation and 100 indicated severe limitation.

Time frame: Postoperatif 6th day

Population: The inclusion criteria were being 18-40 years old, have asymptomatic unilateral mandibular impacted third molars with similar angulation positions according to Winter's classification (mesioangular), and having similar impaction degree according to Pell and Gregory's classification (class II, level B).

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Jaw Function19.5 score on a scaleStandard Deviation 14.9
St. John's Wort OilPostoperative Jaw Function21.4 score on a scaleStandard Deviation 19.1
Virgin Olive OilPostoperative Jaw Function20.6 score on a scaleStandard Deviation 17.6
Primary

Postoperative Jaw Function

For the assessment of difficulty during jaw function, patients were asked to rate it on a 100-mm VAS, wherein 0 indicated no limitation and 100 indicated severe limitation.

Time frame: Postoperatif 1st day

Population: The inclusion criteria were being 18-40 years old, ave asymptomatic unilateral mandibular impacted third molars with similar angulation positions according to Winter's classification (mesioangular), and having similar impaction degree according to Pell and Gregory's classification (class II, level B). Patients with smoking habits, drug abuse, and history of pericoronitis associated with the lower third molar were excluded from the study.

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Jaw Function61.5 score on a scaleStandard Deviation 23.6
St. John's Wort OilPostoperative Jaw Function63.9 score on a scaleStandard Deviation 24.7
Virgin Olive OilPostoperative Jaw Function65.9 score on a scaleStandard Deviation 25.6
Primary

Postoperative Jaw Function

For the assessment of difficulty during jaw function, patients were asked to rate it on a 100-mm VAS, wherein 0 indicated no limitation and 100 indicated severe limitation.

Time frame: Postoperatif 2nd day

Population: The inclusion criteria were being 18-40 years old, have asymptomatic unilateral mandibular impacted third molars with similar angulation positions according to Winter's classification (mesioangular), and having similar impaction degree according to Pell and Gregory's classification (class II, level B).

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Jaw Function55.8 score on a scaleStandard Deviation 25.4
St. John's Wort OilPostoperative Jaw Function51.9 score on a scaleStandard Deviation 25.1
Virgin Olive OilPostoperative Jaw Function62.0 score on a scaleStandard Deviation 25.1
Primary

Postoperative Jaw Function

For the assessment of difficulty during jaw function, patients were asked to rate it on a 100-mm VAS, wherein 0 indicated no limitation and 100 indicated severe limitation.

Time frame: Postoperatif 7th day

Population: The inclusion criteria were being 18-40 years old, ave asymptomatic unilateral mandibular impacted third molars with similar angulation positions according to Winter's classification (mesioangular), and having similar impaction degree according to Pell and Gregory's classification (class II, level B). Patients with smoking habits, drug abuse, and history of pericoronitis associated with the lower third molar were excluded from the study.

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Jaw Function11.5 score on a scaleStandard Deviation 11
St. John's Wort OilPostoperative Jaw Function13.9 score on a scaleStandard Deviation 18
Virgin Olive OilPostoperative Jaw Function13.8 score on a scaleStandard Deviation 15.4
Primary

Postoperative Pain

To record the level of pain, patients were instructed to rate it on a 100-mm visual analog scale (VAS) was used wherein 0 indicated no pain and 100 indicated the worst pain imaginable.

Time frame: Postoperatif 1st day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Pain51.4 score on a scaleStandard Deviation 21.9
St. John's Wort OilPostoperative Pain56.3 score on a scaleStandard Deviation 24.1
Virgin Olive OilPostoperative Pain60.9 score on a scaleStandard Deviation 25.1
Primary

Postoperative Pain

To record the level of pain, patients were instructed to rate it on a 100-mm visual analog scales (VAS) was used wherein 0 indicated no pain and 100 indicated the worst pain imaginable.

Time frame: Postoperatif 2nd day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Pain44.5 score on a scaleStandard Deviation 25.4
St. John's Wort OilPostoperative Pain44.1 score on a scaleStandard Deviation 23.4
Virgin Olive OilPostoperative Pain55.8 score on a scaleStandard Deviation 25.6
Primary

Postoperative Pain

To record the level of pain, patients were instructed to rate it on a 100-mm visual analog scales (VAS) was used wherein 0 indicated no pain and 100 indicated the worst pain imaginable..

Time frame: Postoperatif 3rd day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Pain36.2 score on a scaleStandard Deviation 28.7
St. John's Wort OilPostoperative Pain31.6 score on a scaleStandard Deviation 22.6
Virgin Olive OilPostoperative Pain40.6 score on a scaleStandard Deviation 21.9
Primary

Postoperative Pain

To record the level of pain, patients were instructed to rate it on a 100-mm visual analog scales (VAS) was used wherein 0 indicated no pain and 100 indicated the worst pain imaginable.

Time frame: Postoperatif 4th day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Pain33.6 score on a scaleStandard Deviation 27.7
St. John's Wort OilPostoperative Pain30.3 score on a scaleStandard Deviation 22.4
Virgin Olive OilPostoperative Pain30.4 score on a scaleStandard Deviation 9.2
Primary

Postoperative Pain

To record the level of pain, patients were instructed to rate it on a 100-mm visual analog scales (VAS) was used wherein 0 indicated no pain and 100 indicated the worst pain imaginable.

Time frame: Postoperatif 5th day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Pain22.0 score on a scaleStandard Deviation 23.7
St. John's Wort OilPostoperative Pain17.7 score on a scaleStandard Deviation 16
Virgin Olive OilPostoperative Pain26.3 score on a scaleStandard Deviation 23.6
Primary

Postoperative Pain

To record the level of pain, patients were instructed to rate it on a 100-mm visual analog scales (VAS) was used wherein 0 indicated no pain and 100 indicated the worst pain imaginable.

Time frame: Postoperatif 6th day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Pain16.3 score on a scaleStandard Deviation 16.8
St. John's Wort OilPostoperative Pain15.5 score on a scaleStandard Deviation 18.6
Virgin Olive OilPostoperative Pain19.0 score on a scaleStandard Deviation 17.6
Primary

Postoperative Pain

To record the level of pain, patients were instructed to rate it on a 100-mm visual analog scales (VAS) was used wherein 0 indicated no pain and 100 indicated the worst pain imaginable.

Time frame: Postoperatif 7th day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Pain10.5 score on a scaleStandard Deviation 15.5
St. John's Wort OilPostoperative Pain10.7 score on a scaleStandard Deviation 18.5
Virgin Olive OilPostoperative Pain9.6 score on a scaleStandard Deviation 11.2
Primary

Postoperative Swelling

Facial swelling was assessed using a thread and millimeter ruler and averaged the following five measurements: Distance I (from the angle of the mandible to labial commissure); Distance II (from the angle of the mandible to the nasal border); Distance III (from the angle of the mandible to the external corner of the eye); Distance IV (from the angle of the mandible to tragus) and Distance V (from the angle of the mandible to soft pogonion). For evaluation of changes in the abovementioned distances during the postoperative period, the percentage of facial swelling was calculated by subtracting the preoperative measurements from the postoperative measurements then divided by the preoperative measurements and multiplied by 100.

Time frame: Postoperative 7th day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Swelling2.66 percent changeStandard Deviation 7.13
St. John's Wort OilPostoperative Swelling1.58 percent changeStandard Deviation 4.22
Virgin Olive OilPostoperative Swelling2.30 percent changeStandard Deviation 3.65
Primary

Postoperative Swelling

Facial swelling was assessed using a thread and millimeter ruler and averaged the following five measurements: Distance I (from the angle of the mandible to labial commissure); Distance II (from the angle of the mandible to the nasal border); Distance III (from the angle of the mandible to the external corner of the eye); Distance IV (from the angle of the mandible to tragus) and Distance V (from the angle of the mandible to soft pogonion). For evaluation of changes in the abovementioned distances during the postoperative period, the percentage of facial swelling was calculated by subtracting the preoperative measurements from the postoperative measurements then divided by the preoperative measurements and multiplied by 100.

Time frame: Postoperative 1st day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Swelling4.93 percent changeStandard Deviation 7.6
St. John's Wort OilPostoperative Swelling3.90 percent changeStandard Deviation 5.66
Virgin Olive OilPostoperative Swelling4.96 percent changeStandard Deviation 5.37
Primary

Postoperative Swelling

Facial swelling was assessed using a thread and millimeter ruler and averaged the following five measurements: Distance I (from the angle of the mandible to labial commissure); Distance II (from the angle of the mandible to the nasal border); Distance III (from the angle of the mandible to the external corner of the eye); Distance IV (from the angle of the mandible to tragus) and Distance V (from the angle of the mandible to soft pogonion). For evaluation of changes in the abovementioned distances during the postoperative period, the percentage of facial swelling was calculated by subtracting the preoperative measurements from the postoperative measurements then divided by the preoperative measurements and multiplied by 100.

Time frame: Postoperative 3rd day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Swelling4.09 percentage of swellingStandard Deviation 7.18
St. John's Wort OilPostoperative Swelling3.24 percentage of swellingStandard Deviation 4.88
Virgin Olive OilPostoperative Swelling4.22 percentage of swellingStandard Deviation 4.43
Primary

Postoperative Trismus

For evaluation of trismus, the percentage of difference in maximum mouth opening during the postoperative period (B) was calculated by subtracting the preoperative measurement (A) from the postoperative measurement then dividing by the preoperative measurement (A) and multiplying by 100 (percentage of difference = \[B - A\]/B × 100).

Time frame: Postoperative 1st day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Trismus30.1 percent changeStandard Deviation 8.7
St. John's Wort OilPostoperative Trismus28.7 percent changeStandard Deviation 9.7
Virgin Olive OilPostoperative Trismus28.1 percent changeStandard Deviation 7.8
Primary

Postoperative Trismus

For evaluation of trismus, the percentage of difference in maximum mouth opening during the postoperative period (B) was calculated by subtracting the preoperative measurement (A) from the postoperative measurement then dividing by the preoperative measurement (A) and multiplying by 100 (percentage of difference = \[B - A\]/B × 100).

Time frame: Postoperative 7th day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Trismus38.7 percent changeStandard Deviation 6.8
St. John's Wort OilPostoperative Trismus38.3 percent changeStandard Deviation 8.3
Virgin Olive OilPostoperative Trismus36.7 percent changeStandard Deviation 8.7
Primary

Postoperative Trismus

For evaluation of trismus, the percentage of difference in maximum mouth opening during the postoperative period (B) was calculated by subtracting the preoperative measurement (A) from the postoperative measurement then dividing by the preoperative measurement (A) and multiplying by 100 (percentage of difference = \[B - A\]/B × 100).

Time frame: Postoperative 3rd day

ArmMeasureValue (MEAN)Dispersion
Chlorhexidine Gluconate Plus Benzydamine HydrochloridePostoperative Trismus33.8 percent changeStandard Deviation 8.7
St. John's Wort OilPostoperative Trismus32.4 percent changeStandard Deviation 9.1
Virgin Olive OilPostoperative Trismus31.6 percent changeStandard Deviation 6.7

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026